• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    high voltage dc power system and subsea receiving end assembly it is a method (600) and high voltage dc (hv dc) power system (100) supplied, the system includes a plurality of modules (110) connected in electrical series and divided into at least two groups (111, 113) each operating independently with respect to electrical ground (112) and a plurality of power converter modules (118) electrically coupled to the plurality of se modules (110), the plurality of re power converter modules including a fast earth fault detection and control device (500), the plurality of modules power converter modules that include a receiving end front-end dc-dc converter controller (1100) and an output current damping control (1106).
    公开号:BR102014017323B1
    申请号:R102014017323-4
    申请日:2014-07-14
    公开日:2021-09-14
    发明作者:Dong Dong；Di Zhang；Luis Jose Garces；Maja Harfman Todorovic；Rixin Lai；Song Chi
    申请人:General Electric Company；
    IPC主号:
    专利说明:

    FIELD OF INVENTION
    [001] This description refers to power distribution systems and, more particularly, to systems and methods for control and protection of a high voltage direct current (DC HV) transmission and distribution system. BACKGROUND OF THE INVENTION
    [002] As oil and gas fields in shallow waters dry up, producers are accessing offshore fields in deeper waters with oil facilities that operate far below the sea surface. Typical equipment for such subsea oil production and recovery includes gas compressors and multiple pumps for multiple functions. Electric variable speed drive (VSD) and motor systems are one way to power such equipment directly under deep water. Therefore, the distribution of electrical energy from a remote dry land utility grid or power generation is important to ensure reliable oil and gas production and processing in subsea locations. Typically, the transmission power requirement is approximately one hundred megawatts for medium to large oil/gas fields.
    [003] For applications where most of the power is transmitted over long distances to offshore locations, alternating current (AC) transmission faces technical challenges, which become more significant when the transmission distance is greater than one hundred kilometers. The significant reactive power drawn from subsea distributed cable capacitors restricts the power distribution capacity as well as increases the cost of the system.
    [004] Direct current (DC) transmission is more efficient over longer distances than AC transmission. Medium voltage (MV) or high voltage (HV) DC transmission typically requires electronic power converters that are capable of converting between AC to HV and DC to HV. In conventional converter topologies, each converter switch is designed to handle high voltages, which can range from tens of kilovolts to hundreds of kilovolts depending on application needs. Such switches are typically arranged with series connections of various semiconductor devices, such as insulated gate bipolar transistors (IGBTs) and thyristors. Another method is to use switches within low voltage regime modules and achieve the high voltages needed by connecting as many modules in series as needed by the application. Due to the special subsea application, receiving end converters need to be designed on a modular basis, which is easy to transport, marinize, install and retrieve. DESCRIPTION OF THE INVENTION
    [005] In one embodiment, a high voltage DC power system includes a plurality of transmit end modules (SE) coupled in electrical series and divided into at least two groups each operating independently with respect to ground and a plurality of receiving end power converter (RE) modules electrically coupled to the plurality of SE modules, the plurality of RE power converter modules including a fast ground fault detection and control device, the plurality of RE power converter modules, which include a receive-end front-end DC-DC converter controller and an output current dampening control.
    [006] In another embodiment, a method of protecting and controlling the high voltage (DC of HV) DC power system includes coupling a plurality of loads to a receiving end (RE) power distribution system, the RE power distribution system, configured as a plurality of monopoly distribution systems, configured to operate independently with respect to a ground, each of the plurality of loads coupled to a branch of the RE power distribution system through a respective load distribution cable and a corresponding load energy conversion module RE. The method additionally includes detecting a ground fault in a branch, closing a bypass switch across the conductors of the load distribution cable connected with the branch to bypass the branch load current, decreasing current activity in a branch system. connected monopole distribution, open a ground fault isolation switch, when the monopole distribution system current is approximately zero, increase the current in the connected monopole distribution system to supply other loads in the monopole distribution system, while the branch affected by the ground fault is isolated.
    [007] In yet another embodiment, a subsea receiving end (RE) assembly of a high voltage DC power system includes a plurality of electrically coupled receiving end (RE) series-coupled power converter (RE) branches. has load segment distribution protection devices connected, each RE power converter module supplies a respective load with three-phase alternating current (AC) power for each load segment, each load segment includes a fault detection system. fast grounding, which includes a first current sensor configured to measure load current entering a load distribution cable, a second current sensor configured to measure load current entering a power converter module RE to downstream of the load distribution cable, a ground fault detector configured to compare a residual common-mode current measured by the first and second sensor es current up to a threshold and generate a ground fault command and a load isolation device, configured to isolate a ground fault of the HV DC power system based on the generated ground fault command. BRIEF DESCRIPTION OF THE DRAWINGS
    [008] Figures 1 to 13 show exemplary embodiments of the method and apparatus described in this document.
    [009] Figure 1 is a schematic block diagram of a modular stacking direct current (DC of HV) high voltage direct current (DC of MS) system based on a bipolar current source and a control plane. transmitting end.
    [0010] Figure 2 is a schematic block diagram of another embodiment of a modular stacking direct current (DC of MS) high voltage direct current (HC of HV) system based on a bipolar current source and a plane of transmitting end control.
    [0011] Figure 3 is a schematic block diagram of a transmit end control system such as the first controller or the second controller shown in Figures 1 and 2 in accordance with an exemplary embodiment of the present disclosure.
    [0012] Figure 4 is a schematic diagram of an equivalent circuit of a transmitting end system, configured as two independent current sources.
    [0013] Figure 5 is a schematic block diagram of a ground fault detection and isolation system for a bipolar current source based on modular stacked DC systems.
    [0014] Figure 6 is a flowchart of a method of detecting and isolating a ground fault in the system.
    [0015] Figure 7 is a schematic block diagram of a portion of the system shown in Figures 1 and 2 illustrating a ground fault location.
    [0016] Figure 8 is a graph of a residual common mode current of the GF detector shown in Figure 5 at the input of a distribution cable.
    [0017] Figure 9 is a graph of a residual common mode current of the GF detector shown in Figure 5 at the input of the receiving end module.
    [0018] Figure 10 is a graph that illustrates the effects of a transient ground fault in the system.
    [0019] Figure 11 is a schematic diagram of a receiver-end front-end DC-DC converter and controller with an additional output current dampening control circuit.
    [0020] Figure 12 is a graph of a resonant current that may be present in a branch of the system shown in Figure 1.
    [0021] Figure 13 is a 1300 graph of an overcurrent current as a result of a current spike due to a shedding of loads from other neighboring loads.
    [0022] Although specific functions of various embodiments may be shown in some Figures and not others, this is for convenience only. Any function of any Figure may be referenced and/or claimed in combination with any function of any other Figure.
    [0023] Unless otherwise indicated, the Figures provided herein are intended to illustrate functions of embodiments of the disclosure. It is believed that these functions can be applied to a wide variety of systems, which comprise one or more revelation realizations. As such, the Figures are not intended to include all conventional functions known to those skilled in the art to be required to practice the embodiments disclosed herein. DESCRIPTION OF ACHIEVEMENTS OF THE INVENTION
    [0024] The following detailed description illustrates embodiments of the invention for the purpose of exemplifying and not limiting. The invention is considered to have general applications to the realization of control and protection of power systems in various applications.
    [0025] Specifically, the disclosure of this invention includes the architecture of the bipolar system, the control of the transmit end power conversion upper station for bipolar operation, the control of receiver end power converter modules with current resonance damping, the distribution substation diversion protection structure and the fast earth fault detection and isolation capabilities.
    [0026] The following description refers to the attached Figures, in which, in the absence of a contrary representation, the same numbers in different figures represent similar elements.
    [0027] All MS DC transmit end modules previously mentioned in the patents are controlled as a single current source. The system is only prepared to operate when the complete system is built, thus prolonging the commissioning and construction time. Any failure can jeopardize the entire system operation and reduce system reliability. System flexibility is restricted due to single operating mode. The high impedance ground plane, as shown in the previously mentioned patent, results in the case that submarine cables need full or even higher voltage isolation capability to maintain transient ground fault. Additionally, the ground fault is not easy to detect due to the limited ground fault current.
    [0028] In the simple realization of the disclosure of this invention, the architecture of the bipolar modular stacking system and the transmitting end control are proposed with greater flexibility of operating modes, such as bipolar and monopole modes. The system can tolerate single transmission cable failure. Substation structure and fast but accurate earth fault protection solution are proposed, which provide a traversal capability during a earth fault event. An active current damping controller is proposed for the receiving end modules for healthy distribution system operation.
    [0029] Figure 1 is a schematic block diagram of a modular stacking direct current (DC of HV) high voltage direct current (DC of MS) system based on a 100 bipolar current source and a control plane of transmitting end. In the exemplary embodiment, system 100 includes a transmitting end 102 and a receiving end 104. The transmitting end 102 and receiving end 104 are electrically coupled through the use of a first cable 106 that has a first polarity and a second cable 108 that has a second opposite polarity. In the exemplary embodiment, transmitting end 102 is positioned above the surface of a body of water, and receiving end 104 is positioned proximate to the floor of the water body and therefore typically operates in a submerged pressure environment.
    [0030] Transmitter end 102 includes a generator 109 and a plurality of transmit end modules 110 configured in electrical series. Modules 110 are electrically divided into, in the example in Figure 1, two groups 111 and 113 by a ground 112. In the example illustrated in Figure 2, modules 110 are electrically divided into two groups by a low-resistance conduit 202, such as , but not limited to a wire or a cable.
    [0031] The transmitting end 102 includes two sets of identical unipolar 12-pulse inverter/rectifier systems through the use of modules 110. They operate independently with respect to ground. The polarities of cables 106 and 108 are opposite. During normal operation, the current flowing through the ground is negligible due to symmetrical operation. The use of a bipolar system in place of a unipolar system includes, for example, when a fault occurs, with earth return electrodes installed at each end of the system, approximately half of the rated power can continue to flow through the use of earth. as a return path, when operating in monopolar mode.
    [0032] The transmit end modules are divided into two groups by the location of the ground electrode and are controlled separately through the use of a first controller 114 and a second controller 116. The first controller 114 and the second controller 116 regulate the two groups of transmit-end converters 110 as two identical current sources. Such control also ensures that the ground current is always approximately zero. The voltage levels of the output terminal thereof depend on the loading conditions of the receiving end 104. The voltages of groups 111 and 113 automatically adjust according to the load condition. Therefore, system 100 does not necessarily require a symmetrical loading of the receiving end 104. Figure 2 shows an alternative way of using a low-insulated metallic return wire to conduct current rather than seawater or ground. The system illustrated in Figure 2 is most viable when it is difficult to build a grounding system in an underwater area.
    [0033] The receiving end 104 includes a plurality of receiving end modules 118, electrically coupled in a series configuration. In various embodiments, each receiving end module 118 supplies a single load, such as, but not limited to, a motor 120. In addition, the receiving end units 118 include a first-stage DC-DC converter and a DC-AC inverter. second stage (neither of the two shown in Figures 1 and 2).
    [0034] Figure 3 is a schematic block diagram of a transmit end control system 300, such as a first controller 114 or a second controller 116 (shown in Figures 1 and 2) in accordance with an exemplary embodiment of the present revelation. In the exemplary embodiment, the transmit end control system 300 includes two sets of voltage and current measurement systems 302 and 304. The two voltage sensors 306 and 308 measure the voltage between cables 106 and 108 and the ground, respectively. Interleaving techniques between transmit end (SE) modules in each group 111 and 113 are implemented to reduce link current ripple. The output current of the group 111 converters and the group 113 converters can be further interleaved to completely cancel the ground current.
    [0035] Figure 4 is a schematic diagram of an equivalent circuit of transmit end system 102 configured as two independent current sources 402 and 404. System 100 is a bipolar MS DC subsea system installation, initially commissioned as a bipolar system, however it can be operated in a monopole mode. Therefore, the system can operate as soon as only half of the system is built, thus it cuts the commissioning time in half. Below monopole mode, two subsea cables can be used as a return and transmission path, or two cables can be arranged in parallel as the transmission path and seawater or metallic wire is used as the return path.
    [0036] The bipolar plane of system 100 essentially operates as two parallel monopoles. Any system failure can only jeopardize half the total load. The other half of the system can maintain operation as monopole mode. Due to the nature of two independent power distribution operations, system 100 can still remain active even when one of the subsea transmission cables breaks. The flexibility and reliability of the system are thus significantly improved.
    [0037] Additionally, system 100 allows to reduce an insulating force of transmission and distribution cables and connectors, which can always be guaranteed less than half of the total AC voltage, even in case of ground faults. This reduces the dielectric stress on cables and connectors.
    [0038] Figure 5 is a schematic block diagram of a ground fault detection and isolation system 500 for DC systems in modular stacking based on bipolar current sources such as system 100. Isolation or ground fault in cables and connectors is one of the most significant component failure modes in such a DC HV system due to the harsh environment. Fast ground fault detection, accurate positioning of the fault location and a simple way of fault clearance are important. The ground fault detection and isolation (GF) system 500 for system 100 is illustrated through the use of four receiving end modules 118. Each branch 502 includes a load 120 supplied by a respective receiving end module 118. Each branch is supplied by an input distribution cable 504 and an output distribution cable 506. At each end of the cables 504 and 506 a ground fault detector is electrically coupled to the branch 502. For example, a supply side 508 of cables 504 and 506 include a supply side ground fault detector 510 and a load side 512 of cables 504 and 506 include a load side earth fault detector 514. Additionally, each branch 502 includes a switch. ground fault isolation on a supply side of each ground fault detector 510 and 514. Specifically, ground fault detectors 510 are connected with an isolation switch 516 and ground fault detectors 514 are connected with a switch of insulation 518. Each branch also includes a branch bypass switch 519. As shown in an exploded view 520 of ground fault detectors 510, each ground fault detector 510 includes a current sensing circuit 522 that includes a low pass filter 524 and a comparator 526. The comparator receives a signal 528 representative of the current flowing through cables 504 and 506 at the supply side 508 and a threshold signal representing a predetermined amount current flow that would be apparent in a ground-fault condition. In various embodiments, current sensor circuit 522 includes current sensors 532, such as, but not limited to, residual Hall effect current sensors to detect current flowing through cables 504 and 506.
    [0039] Residual Hall-effect current sensors are deployed at the distribution cable input and at the input of the VSD module 118 and each load branch 502. The GF detectors 510 and 514 compare the residual common-mode current with the threshold 530 to determine the occurrence of a ground fault. The GF 510 and 514 detectors are able to identify ground fault locations directly and control local isolation breakers 516 or 518 to isolate the defective portion of the affected branch 502 of the entire system 100. Upon detecting a ground fault, the GF detectors 510 and 514 simultaneously transmit a trip signal 533 to bypass switch 519 to bypass current around the affected branch 502 and transmit a fault signal 534 to transmitting end 102, which then decreases output current activity on the defective side of the monopole system. Once the link current drops below a predetermined threshold, the GF detectors 510 and 514 open the wired isolating breaker 516 or 518 and let the transmitting end 102 increase the current activity again.
    [0040] Figure 6 is a flowchart of a method 600 of detecting and isolating a ground fault in system 100. The complete chain of detection, positioning and isolation of the GF can be achieved independently. The loss of production due to earth fault can thus be minimized within a very short time span. The defective branch, or portion of a branch, can be detected and isolated quickly, ensuring the continuous operation of the rest of the system. In the exemplary embodiment, method 600 includes detecting 602 the ground fault, simultaneously closing 604 the branch bypass switch and transmitting a ground fault signal to a respective transmitting end controller 114 or 116, decreasing the 606 activity of the current in the monopole affected by the respective transmitting end controller 114 or 116, opening 608 the connected isolation breaker when the current in the branch decreases to a predetermined value, and increasing the activity 610 of the current in the affected monopole back to a normal operating level for the existing charge on the monopole.
    [0041] Figure 7 is a schematic block diagram of a portion of system 100 illustrating the location of ground fault 702 in a wet-mate connector between the distribution cable 504 and one of the modules of the plurality of receiving end modules 118, as indicated.
    [0042] Figure 8 is a graph 800 of the residual common-mode current from the GF 510 detector at the input of distribution cable 504. The graph 800 includes an 802 x axis graduated in time units (seconds) and a y axis 804 graduated in current units (kA). A dash 806 illustrates the current detected by the GF detector 510 at the input of the distribution cable.
    [0043] Figure 9 is a graph 900 of a residual common-mode current from a GF detector 514 at the input of a receiving end module 118. The graph 900 includes a geometric axis x 902 graduated in unit of time (seconds) and a 904 y axis graduated in units of current (kA). A dash 906 illustrates the current sensed by the GF detector 514 at the input of the receiving end module 118. Comparing the residual common mode current from the two adjacent GF detectors 510 and 514 shows that the location of the fault is in the distribution cable. An 806 trace shows a peak at approximately 900 A and at approximately the same time the 906 trace shows a peak at only 43 A.
    [0044] Figure 10 is a graph 1000 that illustrates the effects of a transient ground fault on system 100. Graph 1000 shows an upper plot 1002 and a lower plot 1004 where the upper plot 1002 shows the output power of four modules of receiving end 118 representing two 11 MW compressor loads and two 2.5 MW pump loads. Lower plot 1004 shows the transmit end and receive end link current. Since the ground fault occurs at t=12 seconds, the affected transmit-end controller decreases the inrush current to approximately zero, just after receiving the fault signal from the connected GF detector. The GF detector opens the isolation circuit breaker as soon as the current decreases to a predetermined or minimum value. Then the link current is controlled back to normal value. Unaffected 118 Receiver End Modules return to a normal state after the ground fault detection and isolation process.
    [0045] Figure 11 is a schematic diagram of a 1101 receive-end front-end CC-DC converter and 1100 controller with an additional 1102 output current dampening control circuit. , the receiving end current is rich in current peaks and oscillations due to the various impedance resonances of the transmission and distribution cables and the low bandwidth control of the transmitting end. At least some known transient events, such as sudden load shedding, can easily trigger receiver-end current overpass or surge. These abnormal current behaviors can activate the protection function on any of the 118 receiving end modules as well as lead to further energy losses. The 1100 receive-end front-end DC-DC converter controller includes a 1102 balance regulator circuit, an 1104 power regulator circuit, and an additional 1106 output current dampening control circuit, which has a circuit. receiver end current measuring device 1108. Circuit 1108 includes a high-pass filter (HPF) that reduces an AC component of the current signal. The other frequency information flows through the regulator (Hi) and generates the corresponding active cycle signal (dter). The output of current damping control circuit 1106 automatically adjusts the terminal voltage to damp current surge and surge. As the snubber loop only handles non-dc current, it will not affect the 1104 power regulator circuit.
    [0046] The 1102 balance regulator circuit is configured to balance the current through each upper capacitor, VdcP and a lower capacitor, VdcN. Ideally, VdcP and VdcN will be the same, however there may be some differences between components or between capacitors, which results in a voltage difference. To overcome this difference, balance regulator circuit 1102 controls the two capacitor voltages to be the same.
    [0047] The 1104 power regulator circuit is configured to generate an active cycle control signal for each phase of pulse width modulators 1110 and 1112. A reference voltage Vdc_ref is compared to the measurement AC voltage Vdc, which it generates an error signal input to the Hv controller to generate the PWM duty cycle. To increase an Hv controller response, a 1114 forward power loop is used.
    [0048] The 1114 forward power loop receives a P power signal and the measured Vdc. The energy, P is the power consumption of the supply side, which is divided by the Vdc, which generates a corresponding current reference 1116. The current reference 1116 is scaled by a predetermined gain factor, G. The controller voltage signal Hv and the scaled current reference are combined to generate the duty cycle ddc. The 1114 Direct Power Loop helps correct a sudden change on the supply side, which can create a sudden change in energy. The sudden change in power can suddenly change the active cycle too fast for the Hv controller to maintain an appropriate output.
    [0049] Figure 12 is a 1200 graph of the resonant current. The 1200 graph includes a 1202 x axis graduated in time units (seconds) and a 1204 y axis graduated in current units. A dash 1206 illustrates the current from the receiving end module 118 without a circuit 1106 and a dash 1208 illustrates the current with the circuit 1106.
    [0050] Figure 13 is a 1300 graph of the surge current as a result of a current spike due to shedding loads from other neighboring loads. The 1300 graph includes a 1302 x axis graduated in time units (seconds) and a 1304 y axis graduated in current units. A dash 1306 illustrates the current from the receiving end module 118 without the circuit 1106 and the dash 1208 illustrates the current with the circuit 1106.
    [0051] The above described embodiments of a method and a control and protection system of a subsea power transmission and distribution system provide a reliable and cost-effective means of providing an action earth fault detection and isolation system fast, redundant, fault tolerant and reliable using a bipolar topology and current dampening system. More specifically, the bipolar topology described in this document makes it easy to supply electrical energy from a surface location to a precise subsea location. As a result, the methods and systems described in this document make it easier to operate remote equipment in a cost-effective and reliable manner.
    [0052] This written description uses examples to reveal the invention, to include the best mode and also enable any person skilled in the art to practice the invention, which includes making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they have structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.
    权利要求:
    Claims (5)
    [0001]
    1. HIGH VOLTAGE DC POWER SYSTEM (100) comprising:- a plurality of transmit end modules (110) coupled in electrical series and divided into at least two groups (111, 113), each operating from independently from an electrical ground (112); and - a plurality of receiving end power converter modules (118) electrically coupled to the plurality of transmitting end modules (110), the plurality of receiving end power converter modules (118) including a control and sensing device ground fault (500), the plurality of receiver end power converter modules (118) including a receiver end front-end DC-DC converter controller (1100) and a current dampening control. output (1106), the system (100) comprising a bipolar configuration, having a ground and two opposite polarity transmission cables (504, 506) supplying the receiving end power converter modules (118) from the transmit end modules (110), the output current being the current between the receiving end power converter modules (118) and the transmit end modules (110), the sis subject (100) being characterized by the fast ground fault detection and control device (500) comprising: a first current sensor (532) configured to measure the load current entering a load distribution cable; a second sensor current gauge (532) configured to measure load current entering a receiving end power converter module (118) downstream of the load distribution cable; a ground fault detector (526) configured to compare a residual common mode current measured by the first and second current sensors to a threshold and generate a ground fault command; and a load isolation device (516, 519) configured to isolate a high voltage DC power system ground fault based on the generated ground fault command.
    [0002]
    2. SYSTEM according to claim 1, characterized in that the high voltage DC power system comprises a bipolar configuration, which has a low impedance metallic wire return and two opposite polarity transmission cables (504, 506), which supply the receiving end power converter modules (118) from the transmitting end modules (110).
    [0003]
    3. SYSTEM according to claim 1, characterized in that the high voltage DC power system comprises a monopolar configuration, which has two electrical parallel transmission cables supplying the receiving end power converter modules (118) from the transmitter end modules (110) and at least one low impedance metallic wire return and a ground.
    [0004]
    4. SYSTEM according to claim 1, characterized in that the output current damping control comprises a receiving end current measurement loop (1108) comprising:- a high pass filter configured to eliminate a direct current component of the current ; and - a regulator (Hi) configured to generate a corresponding duty cycle (dter) signal, configured to modify the duty cycle of a first stage DC-DC converter (1101) of the receiving end power converter modules (118) .
    [0005]
    A SYSTEM according to claim 1, characterized in that the receiving end front-end CC-DC converter controller (1110) comprises a current reference circuit (1116) configured to generate a current based reference signal. at a ratio of electrical energy per converter, a voltage across the converter output, and a reference voltage.
    类似技术:
    公开号 | 公开日 | 专利标题
    BR102014017323B1|2021-09-14|HIGH VOLTAGE DC POWER SYSTEM
    CN107800376B|2021-08-17|Safety switch for photovoltaic system
    US9178349B2|2015-11-03|Method and system for architecture, control, and protection systems of modular stacked direct current subsea power system
    US8467160B2|2013-06-18|Bipolar DC to AC power converter with DC ground fault interrupt
    US9270119B2|2016-02-23|High voltage direct current transmission and distribution system
    US10483865B2|2019-11-19|Converters for wind turbine generators
    US10615587B2|2020-04-07|Bipolar DC power transmission scheme
    RU2664711C2|2018-08-23|Protection in transition mode for multi-terminal hdvc network
    BR102015020363A2|2016-03-01|electrical system and method of operating an electrical system
    Niaki et al.2015|A novel fault detection method for VSC-HVDC transmission system of offshore wind farm
    US8643985B2|2014-02-04|Photovoltaic bipolar to monopolar source circuit converter with frequency selective grounding
    CN103823160B|2016-04-13|Power distribution network adaptive earthing selection method and device
    GB2512632A|2014-10-08|Electrical component failure protection circuit
    Jayamaha et al.2018|Ground fault analysis and grounding design considerations in DC microgrids
    BR112013022224B1|2020-02-11|SYSTEM FOR THE OPERATION OF AN ELECTRICAL MACHINE AND METHOD FOR THE PROTECTION OF AN OPERATION CONTROL UNIT
    WO2014131768A1|2014-09-04|Rotor earth fault protection for an electrical variable speed doubly fed induction machine
    US20210351741A1|2021-11-11|Safety Switch for Photovoltaic Systems
    CN202957571U|2013-05-29|Electric leakage detection circuit for single-phase power supply of isolated neutral system
    CN213275752U|2021-05-25|Connection system for voltage absence detector
    CN111566886B|2021-10-19|Method of operating a converter station, converter station and HVDC transmission system
    CN107422229B|2019-08-16|Transmission system fault detection method and device, computer storage medium and equipment
    CN105529945B|2018-05-29|single-phase photovoltaic inverter
    CN103066554B|2015-02-25|Single-phase source leakage detection circuit for isolated neutral system
    BR102013032167A2|2015-12-08|"power transmission system and method"
    US20220014013A1|2022-01-13|Power Electronic Converter with a Ground Fault Detection Unit that Shares a Common Ground with both DC Ports and AC Ports
    同族专利:
    公开号 | 公开日
    BR102014017323A2|2015-11-17|
    US20150015066A1|2015-01-15|
    EP2827158A2|2015-01-21|
    MY170061A|2019-07-02|
    CN104297627A|2015-01-21|
    EP2827158B1|2016-12-14|
    SG10201403893WA|2015-02-27|
    US9496702B2|2016-11-15|
    EP2827158A3|2015-04-08|
    AU2014203750A1|2015-01-29|
    AU2014203750B2|2017-09-14|
    CN104297627B|2019-01-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3530362A|1968-03-04|1970-09-22|Alexei Nikolaevich Filimonov|Converter substation for direct current power transmission|
    JPS5231067B2|1973-11-02|1977-08-12|
    US4639846A|1985-08-16|1987-01-27|Bbc Brown, Boveri & Company, Limited|Method and compensating device for compensating current oscillations|
    SE520851C2|1997-03-24|2003-09-02|Abb Ab|Installation for transmission of electrical power via direct voltage mains for high voltage direct current|
    US6552598B2|2001-07-20|2003-04-22|Vitaly Gelman|Semiconductor high voltage electrical energy transmission switching system and method|
    WO2007028350A1|2005-09-09|2007-03-15|Siemens Akitengesellschaft|Device for electron energy transfer|
    WO2007073256A1|2005-12-21|2007-06-28|Abb Technology Ltd|Hvdc system|
    CN101401294B|2006-03-17|2013-04-17|英捷电力技术有限公司|Variable speed wind turbine having an exciter machine and a power converter not connected to the grid|
    CN101479909B|2006-06-28|2011-12-21|Abb技术有限公司|Modular HVDC converter|
    DE602006014603D1|2006-09-25|2010-07-08|Siemens Ag|ROUTING DEVICE FOR A LOWER SEA ELECTRONIC MODULE|
    US7633770B2|2006-12-08|2009-12-15|General Electric Company|Collection and transmission system|
    US7851943B2|2006-12-08|2010-12-14|General Electric Company|Direct current power transmission and distribution system|
    EP2071694B1|2007-12-11|2019-02-20|General Electric Company|MVDC power transmission system for sub-sea loads|
    US8692408B2|2008-12-03|2014-04-08|General Electric Company|Modular stacked subsea power system architectures|
    US8018083B2|2010-08-05|2011-09-13|General Electric Company|HVDC connection of wind turbine|
    US8624431B2|2011-02-26|2014-01-07|General Electric Company|System and method for power sharing of front-end converters without communication link in a modular-stacked DC transmission system|
    US8743514B2|2011-04-25|2014-06-03|General Electric Company|HVDC power transmission with cable fault ride-through capability|CN104953609A|2014-03-27|2015-09-30|通用电气公司|DC power transmission system and method|
    US10196871B2|2014-09-30|2019-02-05|Hydril USA Distribution LLC|Sil rated system for blowout preventer control|
    US10876369B2|2014-09-30|2020-12-29|Hydril USA Distribution LLC|High pressure blowout preventer system|
    BR112017004973A2|2014-09-30|2018-03-06|Hydril Usa Distrib Llc|control system for a subsea overflow safety system, redundant control system and method for controlling a safety system|
    US10048673B2|2014-10-17|2018-08-14|Hydril Usa Distribution, Llc|High pressure blowout preventer system|
    US9989975B2|2014-11-11|2018-06-05|Hydril Usa Distribution, Llc|Flow isolation for blowout preventer hydraulic control systems|
    US9759018B2|2014-12-12|2017-09-12|Hydril USA Distribution LLC|System and method of alignment for hydraulic coupling|
    US9528340B2|2014-12-17|2016-12-27|Hydrill USA Distribution LLC|Solenoid valve housings for blowout preventer|
    WO2016100663A1|2014-12-17|2016-06-23|Hydril USA Distribution LLC|Power and communications hub for interface between control pod, auxiliary subsea systems, and surface controls|
    EP3070799B1|2015-03-16|2018-11-21|General Electric Technology GmbH|Start-up of hvdc networks|
    GB2537850B|2015-04-28|2019-09-11|General Electric Technology Gmbh|Bipolar DC power transmission scheme|
    GB2537851B|2015-04-28|2017-08-09|General Electric Technology Gmbh|Bipolar DC power transmission scheme|
    CN104820159A|2015-04-30|2015-08-05|国家电网公司|Direct-current bipolar short-circuit fault identification method of flexible direct-current power transmission system|
    US9828824B2|2015-05-01|2017-11-28|Hydril Usa Distribution, Llc|Hydraulic re-configurable and subsea repairable control system for deepwater blow-out preventers|
    US9863997B2|2015-06-19|2018-01-09|Honeywell International Inc.|Devices, methods, and systems for localizing a fault on a live cable|
    GB2541026B|2015-08-07|2019-07-31|Ge Aviat Systems Ltd|Systems, methods and devices for bipolar high voltage direct current ground fault detection|
    GB2541451B|2015-08-20|2018-11-28|Ge Aviat Systems Ltd|Systems, methods, and devices for bipolar high voltage direct current electrical power distribution|
    CA2947465A1|2015-11-18|2017-05-18|General Electric Company|A system and method for fault ride through|
    US10177651B2|2016-12-20|2019-01-08|Mercury Magnetics, Inc.|System for controlling inrush current to eliminate inrush overcurrent to electrical equipment|
    WO2019219217A1|2018-05-18|2019-11-21|Siemens Aktiengesellschaft|Monitoring of a high-voltage dc transmission|
    CN110752580B|2018-07-23|2021-06-01|中国科学院沈阳自动化研究所|Connection box power supply system and method for submarine observation network|
    CN111313440B|2020-02-11|2021-11-26|南方电网科学研究院有限责任公司|Method and device for protecting unbalanced grounding electrode line of multi-terminal direct current transmission system|
    CN112731051B|2020-12-18|2021-10-08|武汉大学|Single-ended fault positioning method and system for high-voltage direct-current transmission line of hybrid network|
    法律状态:
    2015-11-17| B03A| Publication of a patent application or of a certificate of addition of invention [chapter 3.1 patent gazette]|
    2018-11-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-03-03| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-06-29| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-09-14| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 14/07/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/941,657|US9496702B2|2013-07-15|2013-07-15|Method and system for control and protection of direct current subsea power systems|
    US13/941,657|2013-07-15|
    [返回顶部]