WO2022095545A1 - 分布式串联补偿器的控制方法、装置及计算机可读介质 - Google Patents

分布式串联补偿器的控制方法、装置及计算机可读介质 Download PDF

Info

Publication number
WO2022095545A1
WO2022095545A1 PCT/CN2021/113298 CN2021113298W WO2022095545A1 WO 2022095545 A1 WO2022095545 A1 WO 2022095545A1 CN 2021113298 W CN2021113298 W CN 2021113298W WO 2022095545 A1 WO2022095545 A1 WO 2022095545A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
level
module
voltage
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2021/113298
Other languages
English (en)
French (fr)
Inventor
潘磊
林艺哲
任铁强
董云龙
卢宇
马秀达
吴飞翔
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NR Electric Co Ltd
NR Engineering Co Ltd
Original Assignee
NR Electric Co Ltd
NR Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202011212971.4A external-priority patent/CN112491077B/zh
Priority claimed from CN202011212914.6A external-priority patent/CN112491076B/zh
Application filed by NR Electric Co Ltd, NR Engineering Co Ltd filed Critical NR Electric Co Ltd
Publication of WO2022095545A1 publication Critical patent/WO2022095545A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for AC mains or AC distribution networks
    • H02J3/36—Arrangements for transfer of electric power between AC networks via high-voltage DC [HVDC] links; Arrangements for transfer of electric power between generators and networks via HVDC links
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]

Definitions

  • the present application relates to flexible AC power transmission technology, and in particular, to a control method, device and computer-readable medium for a distributed series compensator.
  • each small-capacity compensator can be made lightweight and directly distributed on the power line to realize the power flow control function and effect similar to the static synchronous series compensator, which can provide more flexibility for smart grid. , More advanced control methods, effectively improve the power supply capacity and safety and stability of the power system.
  • the distributed series compensator has the characteristics of small size and light weight; a large number of distributed sub-units ensure the redundancy of the equipment, thereby improving the reliability of the device; at the same time, the distributed series compensator devices can be distributed in the transmission line. On or substation, occupying a small area.
  • distributed series compensator distributed static synchronous series compensator
  • the control and protection systems of the two projects are relatively simple, and both use the module local control mode.
  • the control method is inflexible, and the power flow Adjustment performance is poor.
  • Some domestic universities and research institutes have developed a variety of distributed series compensators (distributed series reactors, distributed static synchronous series compensators, distributed power flow controllers, etc.), mainly in topology, simulation modeling and system. Research is carried out on the control strategy, and there are no literatures and patents on the smooth start and stop of the distributed series compensator.
  • the series-side commutator unit or static series compensator of the existing unified power flow controller can be charged by the parallel voltage source to complete the smooth start, or the series-side commutator unit can be operated by the voltage difference generated after the series transformer is injected into the line. Charging and starting; however, these two methods are not suitable for distributed series compensators that are distributed, cannot add parallel-side auxiliary power, and do not include series transformers.
  • the common distributed series compensator structure is shown in Figure 1, including N-level unit modules, each level of unit module includes three unit modules respectively connected to the three-phase AC line, and the N-level unit modules are connected in series in sequence.
  • the unit module includes a first-type bypass device, an energy acquisition unit, a commutation unit and a control unit.
  • the general startup method and shutdown method are: when starting, after the unit module control power supply is completed to obtain energy, all the unit modules are put into charging, and after the module charging is completed, the converter unit and control unit of the module are unlocked.
  • the DC voltage of the module is kept constant; the converter unit of the unit module is directly blocked and the bypass device of the unit module is bypassed when the unit is out of operation.
  • the line current will also change greatly at the moment when all the unit modules are put in and out, and during the charging process of the unit modules, which has a great impact on the flow of the AC system.
  • the purpose of this application is to provide a control method and device for a distributed series compensator, so as to effectively suppress the DC overvoltage and overcurrent when the unit module is switched on and off, reduce the current disturbance of the AC line during startup and shutdown, and achieve distributed
  • the smooth start and stop of the series compensator improves the stability and reliability of the system.
  • the present application provides a method for controlling a distributed series compensator.
  • the distributed series compensator includes N-level unit modules, and each level includes three unit modules respectively connected to three-phase AC lines, and N-level unit modules The groups are connected in series in sequence, and N is a natural number;
  • the unit module includes a first-type bypass device, an energy acquisition unit, a commutation unit and a control unit;
  • control method includes:
  • the commutation unit of the N-level unit module is gradually put into operation in stages and unlocked after reaching the set first voltage threshold, including:
  • the first type of bypass equipment that separates the unit modules of this level
  • the first type of bypass device that separates the unit module of this level, charges the commutator unit of the unit module of this level, controls the DC voltage of the unit module of this level to charge to the first voltage threshold, unlocks The commutating unit, continuing to charge the commutating unit of the unit module at the current level, and controlling the charging of the DC voltage of the unit module at the current level to the third voltage threshold is defined as one operation round;
  • the third voltage threshold is greater than the first voltage threshold and less than the second voltage threshold.
  • the commutation unit of the N-level unit module is gradually put into operation in stages and unlocked after reaching the set first voltage threshold, comprising: :
  • the power supply of the control unit After receiving the start command, the power supply of the control unit is charged through the energy acquisition unit;
  • the first type of bypass equipment that separates the unit modules of the current level to start charging the commutator units of the unit modules of the current level is sequentially performed on the unit modules of each level, and the operation interval of the unit modules of each level is a preset time threshold;
  • the faulty unit module is skipped during the startup process; if a unit module fails during the startup process, the faulty unit module automatically exits, Does not affect the startup of other unit modules.
  • control method after each level of unit module unlocks the converter unit, the control method further includes:
  • the third voltage threshold is greater than the first voltage threshold and less than the second voltage threshold.
  • the first type of bypass device is a mechanical switch or a fast switch composed of power electronic devices.
  • the first voltage threshold is greater than the minimum DC voltage at which the converter unit can be successfully unlocked; the second voltage threshold is not greater than the nominal DC voltage at which the converter unit can operate normally.
  • the distributed series compensator further includes a second type of bypass device, and the second type of bypass device is connected in parallel with the branches after all the N-level unit modules are connected in series;
  • control method further includes:
  • the second type of bypass device is a fast mechanical bypass switch, and the closing time of the fast mechanical switch is shorter than the closing time.
  • the distributed series compensator further includes a second type of bypass device, and the second type of bypass device is connected in parallel with the branches after all the N-level unit modules are connected in series;
  • control method further includes:
  • control method further includes:
  • the failed unit module automatically exits without affecting the shutdown of other unit modules.
  • a control device for a distributed series compensator wherein the distributed series compensator includes N-level unit modules, and each level includes three unit modules respectively connected to three-phase alternating current.
  • N-level unit modules are connected in series in sequence, and N is a natural number;
  • the unit module includes a first-type bypass device, an energy acquisition unit, a commutation unit and a control unit;
  • control device includes:
  • a first control module configured to gradually put into the commutation unit of the N-level unit module in stages after receiving the start command and unlock the commutator unit after reaching the set first voltage threshold;
  • the second control module is configured to gradually reduce the AC voltage output by the N-level unit module until it is zero and then exit the unit module after receiving the shutdown command.
  • the first control module includes:
  • the charging control sub-module is used to charge the power supply of all unit module control units through the energy obtaining unit after receiving the start command;
  • Hierarchical promoter modules are used to perform the following operations on each level of unit modules in sequence:
  • the first type of bypass equipment that separates the unit modules of this level
  • the DC voltage of the current-level unit module is controlled by separating the first-type bypass device of the current-level unit module and charging the converter unit of the current-level unit module.
  • One operation round is defined as charging to the first voltage threshold, unlocking the converter unit, and continuing to charge the converter unit of the unit module at this level to control the DC voltage of the unit module at this level to charge to the third voltage threshold;
  • the first control module includes:
  • the charging control sub-module is used to charge the power supply of the control unit through the energy acquisition unit after receiving the start command;
  • the hierarchical starter sub-module is used to sequentially perform the operation of starting the charging of the converter unit of the current unit module by the first-type bypass device that separates the unit module of the current level for the unit modules of each level, and the operation interval of the unit module of each level is the preset time threshold; when the DC voltage of the unit module of this level is charged to the set first voltage threshold, unlock the commutator unit of the unit module of this level, continue to charge the converter unit of the unit module of this level, and control the The DC voltage of the unit module of this stage is charged to the set second voltage threshold.
  • each level of unit module unlocks the commutator unit, it first controls the DC voltage of the unit module at this level to charge to a third voltage threshold, and then controls the unit at this level to charge the DC voltage to a third voltage threshold.
  • the DC voltage of the module is charged to a second voltage threshold; the third voltage threshold is greater than the first voltage threshold and less than the second voltage threshold.
  • the first voltage threshold is greater than the minimum DC voltage at which the converter unit can be successfully unlocked; the second voltage threshold is not greater than the nominal DC voltage at which the converter unit can operate normally.
  • the distributed series compensator further includes a second type of bypass device, and the second type of bypass device is connected in parallel with the branches after all the N-level unit modules are connected in series;
  • the charging control sub-module after receiving the start command, the charging control sub-module first separates the second type of bypass device, and then charges the power supply of the control unit through the energy acquisition unit.
  • the second control module includes:
  • the step-down control sub-module is used to gradually reduce the AC voltage output by the unit modules at all levels after receiving the shutdown command;
  • the shutdown control sub-module is used for closing the first-type bypass devices of all the unit modules after the AC voltage output by all the unit modules drops to zero to complete the shutdown process.
  • the distributed series compensator further includes a second type of bypass device, and the second type of bypass device is connected in parallel with the branches after all the N-level unit modules are connected in series;
  • outage control sub-module is further configured as:
  • the first-type bypass devices and the second-type bypass devices of all the unit modules are closed at the same time to complete the shutdown process.
  • the present application can realize the smooth start and stop of the distributed series compensator: at start-up, the converter units of each unit module are gradually put into operation in stages, and when a certain converter unit can be successfully unlocked, the minimum direct current is reached. After the voltage is applied, the converter unit is unlocked, so as to avoid the current and power shock to the AC grid when multiple unit modules are suddenly connected to the line, and at the same time, it can avoid the large fluctuation of line power caused by the unit module being connected to the line for a long time and a capacitor; , and the third voltage threshold is also used for step-down unlocking during startup to avoid overvoltage shock to the unit module when unlocking with the nominal DC voltage; during shutdown, firstly control the unit module to gradually reduce the voltage of each unit. After the AC voltage output by the module becomes zero, then exit each unit module to avoid the impact on the AC power grid caused by the direct outage of the distributor series compensator.
  • the stability and reliability of the distributed series compensator can be improved.
  • FIG. 1 is a structural diagram of a distributed series compensator according to a first embodiment of the present application
  • FIG. 2A is a schematic flowchart of a control method for a distributed series compensator according to the first embodiment of the present application
  • 2B is a computer-executed flowchart of a control method for a distributed series compensator according to the first embodiment of the present application
  • FIG. 3 is a computer-executed flowchart of a method for controlling a distributed series compensator according to a second embodiment of the present application
  • FIG. 4 is a computer-executed flowchart of a method for controlling a distributed series compensator according to a third embodiment of the present application
  • FIG. 6 is a computer-executed flowchart of a method for controlling a distributed series compensator according to a fourth embodiment of the present application.
  • FIG. 8 is a computer-executed flowchart of a control method for a distributed series compensator according to a sixth embodiment of the present application.
  • 9A is a schematic flowchart of a control method for a distributed series compensator according to a seventh embodiment of the present application.
  • FIG. 10 is a computer-executed flowchart of a method for controlling a distributed series compensator according to an eighth embodiment of the present application.
  • FIG. 12 is a schematic diagram of a control device of a distributed series compensator according to the first exemplary embodiment of the present application.
  • FIG. 13 is a schematic diagram of a control device of a distributed series compensator according to the second exemplary embodiment of the present application.
  • the distributed series compensator includes N-level unit modules, and each level includes three unit modules that are respectively connected to the three-phase AC line, and the N-level unit modules are connected to the line in series in sequence, and N is a natural number;
  • the above-mentioned unit module includes a first-type bypass device, an energy acquisition unit, a commutation unit and a control unit.
  • FIG. 2A is a schematic diagram of a start-up method of a distributed series compensator provided by the first embodiment of the present application.
  • the provided control method includes the following steps:
  • S121 The first type of bypass device that separates the unit modules of this level
  • S122 Charge the commutation unit of the unit module of the current level until the DC voltage of the unit module of the current level is charged to the first voltage threshold;
  • S124 Continue to charge the commutator unit of the unit module at the current level, and control the DC voltage of the unit module at the current level to charge to the second voltage threshold.
  • the computer execution flow of the above control method includes the following steps:
  • step (a1) After receiving the start command, charge the power supply of the control unit through the energy obtaining unit, and enter step (a2) after charging;
  • step (a2) Separate the first-level bypass device of the first-level unit module, charge the converter unit of the first-level unit module, and charge the DC voltage of the first-level unit module to the set first voltage threshold Then enter step (a3);
  • step (a4) Separate the first type of bypass device of the second-level unit module, charge the commutation unit of the second-level unit module, and charge the DC voltage of the second-level unit module to the set first voltage threshold Then enter step (a5);
  • step (a5) unlocking the commutator unit of the second-level unit module, and entering step (a6) after the DC voltage of the second-level unit module is charged to the set second voltage threshold;
  • step (a6) sequentially charge the DC voltage of the third-level to the Nth-level unit modules to the set second voltage threshold, and enter step (a7);
  • FIG. 3 is a computer-executed flowchart of a control method for a distributed series compensator according to a second embodiment of the present application.
  • S220 Perform the operation of starting the charging of the commutator unit of the unit module of the current level by the first-type bypass device that separates the unit module of the level of the unit module in sequence, and the operation interval of the unit module of each level is a preset time threshold At the same time, when the DC voltage of the unit module of this level is charged to the set first voltage threshold, unlock the commutator unit of the unit module of this level, continue to charge the converter unit of the unit module of this level, and control the unit of this level. The DC voltage of the module is charged to the set second voltage threshold.
  • each level of unit module unlocks the commutator unit, it first controls the DC voltage of the unit module at this level to charge to a set third voltage threshold, and then controls the DC voltage of the unit module at this level to gradually charge to a level of The set second voltage threshold; the third voltage threshold is greater than the first voltage threshold and less than the second voltage threshold.
  • the computer execution flow of the above control method includes the following steps:
  • step (a1) After receiving the start command, charge the power supply of the control unit through the energy obtaining unit, and enter step (a2) after charging;
  • step (a2) separate the first-level bypass equipment of the first-level unit module, charge the commutation unit of the first-level unit module, and enter step (a3) after the set delay T; After the DC voltage of the first-level unit module is charged to the set first voltage threshold, unlock the commutation unit of the first-level unit module, and control the DC voltage of the first-level unit module to the set second voltage threshold;
  • step (a3) separate the first-class bypass equipment of the second-stage unit module, charge the commutation unit of the second-stage unit module, and enter step (a4) after the set delay T; After the DC voltage of the second-level unit module is charged to the set first voltage threshold, the commutation unit of the second-level unit module is unlocked, and the DC voltage of the second-level unit module is controlled to the set second voltage threshold;
  • step (a4) According to the above steps (a2) and (a3) and the set delay T, separate the first type of bypass equipment from the third stage to the Nth stage unit module in turn; and sequentially separate the third stage to the Nth stage
  • the DC voltage of the level unit module is charged to the set second voltage threshold, and the process proceeds to step (a5);
  • the first voltage threshold is greater than the minimum DC voltage at which the converter unit can be successfully unlocked; the second voltage threshold is not greater than the nominal DC voltage at which the converter unit can operate normally.
  • FIG. 4 is a computer-executed flowchart of a control method for a distributed series compensator according to a third embodiment of the present application.
  • the provided control method includes the following steps:
  • the distributed series compensator according to the second embodiment of the present application further includes a second type of bypass device.
  • the second type of bypass device is connected in parallel with the branches after all N-level unit modules are connected in series.
  • the first type of bypass device is a mechanical switch or a fast switch composed of power electronic devices, and the closing time is less than 10ms;
  • the second type of bypass device is a fast mechanical bypass switch, and its closing time is faster than the closing time.
  • the gate time is about 40ms.
  • FIG. 6 is a computer-executed flowchart of a control method for a distributed series compensator according to a fourth embodiment of the present application.
  • step (a1) The steps are: after receiving the start command, separate the second type of bypass device, charge the power supply of the control unit through the energy obtaining unit, and enter step (a2) after the charging is completed.
  • FIG. 7 is a computer-executed flowchart of a control method for a distributed series compensator according to a fifth embodiment of the present application.
  • step (a1) The steps are: after receiving the start command, separate the second type of bypass device, charge the power supply of the control unit through the energy obtaining unit, and enter step (a2) after the charging is completed.
  • step (b1 ) is: after the AC voltage output by all the unit modules drops to zero, the first-type bypass equipment and the second-type bypass equipment of all the unit modules are closed at the same time to complete the shutdown process.
  • FIG. 9A is a schematic flowchart of a control method for a distributed series compensator according to a seventh embodiment of the present application
  • FIG. 9B is a computer-executed flowchart of a control method for a distributed series compensator according to the seventh embodiment of the present application.
  • a third voltage threshold may also be added, and the third voltage threshold is greater than the first voltage threshold and less than the second voltage threshold.
  • the control method implemented according to the seventh example of the present application includes the following steps:
  • S320 Perform the operations of steps S321 to S325 on the unit modules at all levels in sequence:
  • S321 The first type of bypass device that separates the unit modules of this level
  • S322 Charge the commutation unit of the unit module of this level until the DC voltage of the unit module of this level is charged to the first voltage threshold;
  • S324 Charge the commutation unit of the unit module of this level, and control the DC voltage of the unit module of this level to charge to a third voltage threshold;
  • S325 Continue to charge the commutator unit of the unit module of this level, and control the DC voltage of the unit module of this level to charge to the second voltage threshold.
  • the third voltage threshold is greater than the first voltage threshold and less than the second voltage threshold.
  • the computer execution flow of the control method shown in FIG. 9A includes the following steps:
  • step (a1) After receiving the start command, charge the power supply of the control unit through the energy obtaining unit, and enter step (a2) after charging;
  • step (a3) Unlock the converter unit of the first-level unit module, control to charge the DC voltage of the first-level unit module to the set third voltage threshold, and then control to gradually charge the DC voltage of the first-level unit module To the set second voltage threshold, enter step (a4);
  • step (a4) Separate the first type of bypass device of the second-level unit module, charge the commutation unit of the second-level unit module, and charge the DC voltage of the second-level unit module to the set first voltage threshold Then enter step (a5);
  • step (a5) Unlock the converter unit of the second-level unit module, control to charge the DC voltage of the first-level unit module to the set third voltage threshold, and then control to gradually charge the DC voltage of the second-level unit module To the set second voltage threshold, enter step (a6);
  • step (a6) sequentially charge the DC voltage of the third-level to the Nth-level unit modules to the set second voltage threshold, and enter step (a7);
  • FIG. 10 is a computer-executed flowchart of a control method for a distributed series compensator according to an eighth embodiment of the present application.
  • the computer execution process of the control method implemented according to the eighth example of the present application includes the following steps:
  • step (a1) After receiving the start command, charge the power supply of the control unit through the energy obtaining unit, and enter step (a2) after charging;
  • (a2) separate the first-class bypass device of the first-stage unit module, and charge the commutation unit of the first-stage unit module.
  • the commutation unit of the first-level unit module is unlocked, and the DC voltage of the first-level unit module is controlled to be charged to the set third voltage threshold, Then control to gradually charge the DC voltage of the first-level unit module to the set second voltage threshold;
  • step (a3) Separate the first type of bypass equipment of the second-stage unit module to charge the commutation unit of the second-stage unit module, and after the set delay T, enter step (a4), at the same time of the first After the DC voltage of the second-level unit module is charged to the set first voltage threshold, the commutator unit of the second-level unit module is unlocked, and the DC voltage of the second-level unit module is controlled to be charged to the set third voltage threshold , and then control to gradually charge the DC voltage of the first-level unit module to the set second voltage threshold;
  • step (a4) According to the above steps (a2) and (a3) and the set delay T, separate the first type of bypass equipment from the third stage to the Nth stage unit module in turn; and sequentially separate the third stage to the Nth stage
  • the DC voltage of the level unit module is gradually charged to the set second voltage threshold, and the process proceeds to step (a5);
  • the aforementioned delay T between the first bypass devices separating different-level unit modules is greater than the time for the unit modules to be charged to the first voltage threshold.
  • the third voltage threshold is greater than the first voltage threshold and less than the second voltage threshold.
  • FIG. 11 is a computer-executed flowchart of a control method for a distributed series compensator according to the ninth embodiment of the present application.
  • S420 Perform the following operations on the unit modules of each level in sequence: first perform the operation rounds of the unit modules at the current level, and then while the operation rounds of the unit modules at the next level are performed, the commutation units of the unit modules at the current level continue to operate.
  • the charging controls the DC voltage of the unit module of this level to be charged to the second voltage threshold.
  • the third voltage threshold is greater than the first voltage threshold and less than the second voltage threshold.
  • the computer execution process of the control method implemented according to the ninth example of the present application includes the following steps:
  • step (a1) After receiving the start command, charge the power supply of the control unit through the energy obtaining unit, and enter step (a2) after charging;
  • step (a2) Separate the first-level bypass device of the first-level unit module, charge the converter unit of the first-level unit module, and charge the DC voltage of the first-level unit module to the set first voltage threshold Then enter step (a3);
  • step (a3) Unlock the commutator unit of the first-level unit module, control to charge the DC voltage of the first-level unit module to the set third voltage threshold, enter step (a4), and control the first-level unit module to charge at the same time.
  • the DC voltage of the group is gradually charged to the set second voltage threshold;
  • step (a4) Separate the first type of bypass device of the second-level unit module, charge the commutation unit of the second-level unit module, and charge the DC voltage of the second-level unit module to the set first voltage threshold Then enter step (a5);
  • step (a5) Unlock the commutator unit of the second-level unit module, control to charge the DC voltage of the first-level unit module to the set third voltage threshold, enter step (a6), and control the second-level unit module at the same time.
  • the DC voltage of the group is gradually charged to the set second voltage threshold;
  • step (a6) sequentially charge the DC voltage of the third-level to the Nth-level unit modules to the set second voltage threshold, and enter step (a7);
  • the first voltage threshold, the second voltage threshold, the third voltage threshold and the fixed delay T for different projects and different distributed unit modules, the voltage thresholds are different, and the fixed delay T is also different, This is a well-known technology and will not be repeated here.
  • FIG. 12 is a schematic diagram of a control device of a distributed series compensator according to the first exemplary embodiment of the present application.
  • the present application also provides a control device for a distributed series compensator.
  • the control device for the start-up phase of the distributed series compensator, includes a charging control module 10 and a hierarchical start-up module 20, wherein:
  • the charging control module is used to charge the power supply of all unit module control units through the energy acquisition unit after receiving the start command;
  • the hierarchical startup module is used to perform the following operations on the unit modules at all levels in sequence:
  • the first type of bypass equipment that separates the unit modules of this level
  • the first voltage threshold is greater than the minimum DC voltage at which the converter unit can be successfully unlocked; the second voltage threshold is not greater than the nominal DC voltage at which the converter unit can operate normally.
  • each level of unit module unlocks the commutator unit, firstly controls the DC voltage of the unit module at this level to charge to a third voltage threshold, and then controls the DC voltage of the unit module at this level The voltage is charged to a second voltage threshold; the third voltage threshold is greater than the first voltage threshold and less than the second voltage threshold.
  • the DC voltage of the first type of bypass device that separates the unit module of this level and controls the commutation unit of the unit module of this level to charge the DC voltage of the unit module of this level is charged to the second level.
  • a voltage threshold, unlocking the commutator unit, continuing to charge the commutator unit of the unit module at this level, and controlling the DC voltage of the unit module at this level to charge to the third voltage threshold are defined as one operation round. Perform the following operations on the unit modules of each level in turn: first perform the operation rounds of the unit modules of the current level, and then while the operation rounds of the unit modules of the next level are performed, the converter unit of the unit module of this level continues to charge control.
  • the DC voltage of the unit module of this stage is charged to a second voltage threshold; the third voltage threshold is greater than the first voltage threshold and less than the second voltage threshold.
  • the first-type bypass device that separates the unit modules of the current-level unit modules is sequentially performed to start charging the converter units of the unit modules of the current-level unit modules.
  • the operation interval of the unit module is a preset time threshold; when the DC voltage of the unit module of this level is charged to the set first voltage threshold, the commutation unit of the unit module of this level is unlocked, and the operation of the unit module of this level is continued.
  • the converter unit is charged, and the DC voltage of the unit module of this level is controlled to be charged to the set second voltage threshold.
  • the distributed series compensator when the distributed series compensator further includes a second type of bypass device, the second type of bypass device is connected in parallel with the branches after all the N-level unit modules are connected in series.
  • the charging control module after receiving the start command, first separates the second type of bypass device, and then charges the power supply of the control unit through the energy obtaining unit.
  • FIG. 13 is a schematic diagram of a control device of a distributed series compensator according to the second exemplary embodiment of the present application.
  • the control device includes: a step-down control module 30 and a shutdown control module 40 . in:
  • the step-down control module is used to gradually reduce the AC voltage output by the unit modules at all levels after receiving the shutdown command;
  • the shutdown control module is used to close the first-class bypass equipment of all unit modules after the output AC voltage of all unit modules drops to zero to complete the shutdown process.
  • the distributed series compensator further includes a second type of bypass device
  • the second type of bypass device is connected in parallel with the branches after all the N-level unit modules are connected in series.
  • the shutdown control module closes the first-type bypass equipment and the second-type bypass equipment of all the unit modules at the same time after the AC voltage output by all the unit modules drops to zero to complete the shutdown process.
  • the integrated unit/module if implemented in the form of a software program module and sold or used as a stand-alone product, may be stored in a computer readable memory.
  • the memory includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.
  • the present invention describes an embodiment that includes a single distributed series compensator, but the present application is not limited to series compensator systems of this structure, and is applicable to distributed compensators including series-connected transformers or including parallel compensating devices. Any method involving graded starting, or charging at the module level and unlocking at the voltage level falls within the scope of this application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

本申请提供一种分布式串联补偿器的控制方法、装置及计算机可读介质，所述分布式串联补偿器包括N级单元模组，每级包括三个单元模组分别对应接入三相交流线路，N级单元模组依次串联接入线路，N为自然数；所述单元模组包括第一类旁路设备、取能单元、换流单元和控制单元；其中，所述控制方法包括：收到启动命令后，分级逐步投入所述N级单元模组的换流单元并达到设定的第一电压阈值后解锁所述换流单元；和/或，收到停运命令后，逐渐降低所述N级单元模组输出的交流电压直至为零后退出所述单元模组。此方法可以有效减少分布式串联补偿器启动和停运时对交流电网产生的扰动，防止单元模组的直流过电压，实现分布式串联补偿器的平稳起动和停运。

Description

分布式串联补偿器的控制方法、装置及计算机可读介质 技术领域
本申请涉及柔性交流输电技术，具体涉及一种分布式串联补偿器的控制方法、装置及计算机可读介质。
背景技术
随着大型电力系统的互联以及各种新设备的使用，在使发电、输电更经济、更高效的同时也增加了电力系统的规模和复杂度；再加上大量的分布式发电系统接入电网，使传统的固定由输电网向配电网传送的潮流发生逆向；用户负荷的不断增长需要潮流控制手段提高现有的功率输送能力；正在蓬勃发展的智能电网和电力市场间复杂的功率交换需要频繁的潮流优化控制。
分布式串联补偿器，可以将每个小容量的补偿器制作轻巧得直接分布式地悬挂于电力线路上，实现和静止同步串联补偿器相近的电网潮流控制功能和效果，可为智能电网提供更灵活、更先进的控制手段，有效提高电力系统的供电能力和安全稳定性。分布式串联补偿器具有体积小、重量轻等特点；大量分布式的子单元保障了设备的冗余性，进而提升了装置的可靠性；同时，分布式串联补偿器装置可分散部署在输电线路上或者变电站，占地小。
目前国外已有两个分布式串联补偿器的示范工程(分布式静止同步串联补偿器)项目，两个项目的控制保护系统比较简单，均采用模块就地控制的模式，控制方式不灵活，潮流调节的性能较差。国内有部分高校和科研院所开展了多种分布式串联补偿器(分布式串联电抗器、分布式静止同步串联补偿器、分布式潮流控制器等)，主要在拓扑结构、仿真建模和系统控制策略上开展研究，尚未有关于分布式串联补偿器的平滑启动和停运的文献和专利。
现有统一潮流控制器的串联侧换流单元或静止串联补偿器可以通过并联的电压源进行充电后完成平滑启动，也可以通过串联变压器注入线路后产生的电压差对串联侧的换流单元进行充电和启动；但这两种方法并不适用于分散布置、无法增加并联侧辅助电源，且不包含串联变压器的分布式串联补偿器。
常见的分布式串联补偿器结构如附图1所示，包含N级单元模组，每级单元模组包括三个单元模组分别对应接入三相交流线路，N级单元模组依次串联接入线路；所述单元模组包括第一类旁路设备、取能单元、换流单元和控制单元。一般的启动方式和停运方式为：启动时，在单元模组控制电源完成取能后，将所有单元模组全部投入充电，模组充电完成后然后再解锁模组的换流单元、控制单元模块的直流电压维持恒定；停运时直接闭锁单元模组的换流单元、并旁路单元模组的旁路设备。这种启动和停运方式，在所有单元模组投入和退出瞬间、以及单元模组充电的过程线路电流也会有很大的变化，对交流系统的潮流产生很大影响。
为了解决以上启动和停运方式的不足，减少启动和停运对交流系统的扰动，充分发挥分布式串联补偿器潮流优化的特点，推动分布式潮流控制器应用的快速发展，需要一种更稳定、更适合工程应用的启动和停运方式。
发明内容
本申请旨在提供一种分布式串联补偿器的控制方法及装置，以有效抑制单元模组投退时的直流过电压和过电流，减小启动和停运时交流线路的电流扰动，实现分布式串联补偿器的平稳启动和停运，提高系统的稳定性和可靠性。
本申请提供一种分布式串联补偿器的法控制方法，所述分布式串联补偿器包括N级单元模组，每级包括三个单元模组分别对应接入三相交流线路，N级单元模组依次串联接入线路，N为自然数；所述单元模组包括第一类旁路设备、取能单元、换流单元和控制单元；
其中，所述控制方法包括：
收到启动命令后，分级逐步投入所述N级单元模组的换流单元并达到设定的第一电压阈值后解锁所述换流单元；和/或
收到停运命令后，逐渐降低所述N级单元模组输出的交流电压直至为零后退出所述单元模组。
根据本申请的一些实施例，所述收到启动命令后，分级逐步投入所述N级单元模组的换流单元并达到设定的第一电压阈值后解锁所述换流单元，包括：
收到启动命令后，通过所述取能单元给所有单元模组控制单元的电源充电；
依次对各级单元模组执行如下操作：
分开本级单元模组的第一类旁路设备；
对本级单元模组的换流单元充电，直至本级单元模组的直流电压充电至第一电压阈值；
解锁换流单元；
继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至第二电压阈值。
根据本申请的一些实施例，将分开本级单元模组的第一类旁路设备、对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第一电压阈值、解锁换流单元、继续对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第三电压阈值定义为一个操作轮次；
依次对各级单元模组执行如下操作：先执行本级单元模组的操作轮次，然后在进行下一级单元模组操作轮次的同时，本级单元模组的换流单元继续充电控制本级单元模组的直流电压充电至第二电压阈值；
所述第三电压阈值大于第一电压阈值小于第二电压阈值。
根据本申请的一些实施例，其中，所述收到启动命令后，分级逐步投入所述N级单元模组的换流单元并达到设定的第一电压阈值后解锁所述换流单元，包括：
收到启动命令后，通过取能单元给控制单元的电源充电；
对各级单元模组依次执行分开本级单元模组的第一类旁路设备对本级单元模组的换流单元开始充电的操作，每级单元模组的操作间隔为预设时间阈值；
当本级单元模组的直流电压充电至设定的第一电压阈值后，解锁本级单元模组的换流单元，继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至设定的第二电压阈值。
根据本申请的一些实施例，如有部分单元模组存在故障，则启动过程中跳过故障的单元模组；如有单元模组在启动过程中发生了故障，则故障单元模组自主退出、不影响其它单元模组的启动。
根据本申请的一些实施例，每级单元模组解锁换流单元后，所述控制方法还包括：
先控制本级所述单元模组的直流电压充电至第三电压阈值，再控制本级所述单元模组的直流电压充电至第二电压阈值；
所述第三电压阈值大于第一电压阈值小于第二电压阈值。
根据本申请的一些实施例，所述第一类旁路设备为机械开关或由电力电子器件构成的快速开关。
根据本申请的一些实施例，所述第一电压阈值大于所述换流单元能成功解锁的最小直流电压；所述第二电压阈值不大于所述换流单元可正常运行的标称直流电压。
根据本申请的一些实施例，所述分布式串联补偿器还包括第二类旁路设备，第二类旁路设备与所有N级单元模组串联连接后的支路并联连接；
其中，所述收到启动命令后，通过取能单元给控制单元的电源充电之前，所述控制方法还包括：
分开所述第二类旁路设备。
根据本申请的一些实施例，所述第二类旁路设备为快速机械旁路开关，所述快速机械开关的合闸时间比分闸时间短。
根据本申请的一些实施例，所述收到停运命令后，逐渐降低所述N级单元模组输出的交流电压直至为零后退出所述单元模组，包括：
收到所述停运命令后，逐渐降低各级所述单元模组输出的交流电压；
所有所述单元模组输出的交流电压降至零后，合闸所有所述单元模组的所述第一类旁路设备，完成停运过程。
根据本申请的一些实施例，所述分布式串联补偿器还包括第二类旁路设备，第二类旁路设备与所有N级单元模组串联连接后的支路并联连接；
其中，所有所述单元模组输出的交流电压降至零后，所述控制方法还包括：
同时合闸所有所述单元模组的所述第一类旁路设备和所述第二类旁路设备，完成停运过程。
根据本申请的一些实施例，所述收到停运命令后，所述控制方法还包括：
如所述单元模组在停运过程中发生故障，则故障的所述单元模组自动退出、不影响其它所述单元模组的停运。
根据本申请的第二方面，还提供一种分布式串联补偿器的控制装置，所述分布式串联补偿器包括N级单元模组，每级包括三个单元模组分别对应接入三相交流线路，N级单元模组依次串联接入线路，N为自然数；所述单元模组包括第一类旁路设备、取能单元、换流单元和控制单元；
其中，所述控制装置包括：
第一控制模块，用于收到启动命令后，分级逐步投入所述N级单元模组的换流单元并达到设定的第一电压阈值后解锁所述换流单元；和/或
第二控制模块，用于收到停运命令后，逐渐降低所述N级单元模组输出的交流电压直至为零后退出所述单元模组。
根据本申请的一些实施例，所述第一控制模块，包括：
充电控制子模块，用于收到所述启动命令后，通过所述取能单元给所有单元模组控制单元的电源充电；
分级启动子模块，用于依次对各级单元模组执行如下操作：
分开本级单元模组的第一类旁路设备；
对本级单元模组的换流单元充电，直至本级单元模组的直流电压充电至第一电压阈值；
解锁换流单元；
继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至第二电压阈值。
根据本申请的一些实施例，所述分级启动子模块中，将分开本级单元模组的第一类旁路设备、对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第一电压阈值、解锁换流单元、继续对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第三电压阈值定义为一个操作轮次；
依次对各级单元模组执行如下操作：先执行本级单元模组的操作轮次，然后在进行下一级单元模组操作轮次的同时，本级单元模组的换流单元继续充电控制本级单元模组的直流电压充电至第二电压阈值；所述第三电压阈值大于第一电压阈值小于第二电压阈值。
根据本申请的一些实施例，所述第一控制模块，包括：
充电控制子模块，用于收到启动命令后，通过取能单元给控制单元的电源充电；
分级启动子模块，用于对各级单元模组依次执行分开本级单元模组的第一类旁路设备对本级单元模组的换流单元开始充电的操作，每级单元模组的操作间隔为预设时间阈值；当本级单元模组的直流电压充电至设定的第一电压阈值后，解锁本级单元模组的换流单元，继续 对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至设定的第二电压阈值。
根据本申请的一些实施例，其中所述分级启动子模块中，每级单元模组解锁换流单元后，先控制本级单元模组的直流电压充电至第三电压阈值，再控制本级单元模组的直流电压充电至第二电压阈值；所述第三电压阈值大于第一电压阈值小于第二电压阈值。
根据本申请的一些实施例，所述第一电压阈值大于所述换流单元能成功解锁的最小直流电压；所述第二电压阈值不大于所述换流单元可正常运行的标称直流电压。
根据本申请的一些实施例，所述分布式串联补偿器还包括第二类旁路设备，第二类旁路设备与所有N级单元模组串联连接后的支路并联连接；
其中，所述充电控制子模块，收到启动命令后，先分开第二类旁路设备，再通过取能单元给控制单元的电源充电。
根据本申请的一些实施例，所述第二控制模块包括：
降压控制子模块，用于收到所述停运命令后，逐渐降低各级所述单元模组输出的交流电压；
停运控制子模块，用于所有所述单元模组输出的交流电压降至零后，合闸所有所述单元模组的所述第一类旁路设备，完成停运过程。
根据本申请的一些实施例，所述分布式串联补偿器还包括第二类旁路设备，第二类旁路设备与所有N级单元模组串联连接后的支路并联连接；
其中，所述停运控制子模块还被配置为：
所有所述单元模组输出的交流电压降至零后，同时合闸所有所述单元模组的所述第一类旁路设备和所述第二类旁路设备，完成停运过程。
根据本申请的另一方面，还提供一种计算机可读介质，其上存储有计算机程序，其中，所述程序被处理器执行时实现上述的控制方法。
采用上述方案后，本申请可以实现分布式串联补偿器的平稳启动和停运：在启动时，分级逐步投入各单元模组的换流单元、并在到达一定换流单元能成功解锁的最小直流电压后开始解锁换流单元，从而可以避免多个单元模块突然接入线路时对交流电网的电流和功率突击、同时可避免单元模组长时间串入线路一个电容造成线路功率的大幅波动；此外，在启动时还采用第三电压阈值进行降压解锁，避免采用标称直流电压解锁时可能对单元模组产生过电压冲击；在停运时，先通过单元模组的控制，逐渐降低各单元模组输出的交流电压变为零后，再退出各单元模组，避免分布器串联补偿器直接停运造成的对交流电网的冲击。采用上述启动和停运方案，可以提高分布式串联补偿器的稳定性和可靠性。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图，而并不超出本申请要求保护的范围。
图1是根据本申请第一实施例的分布式串联补偿器的结构图；
图2A是根据本申请第一实施例的分布式串联补偿器的控制方法流程示意图；
图2B是根据本申请第一实施例的分布式串联补偿器的控制方法计算机执行流程图；
图3是根据本申请第二实施例的分布式串联补偿器的控制方法计算机执行流程图；
图4是根据本申请第三实施例的分布式串联补偿器的控制方法计算机执行流程图；
图5是根据本申请第二实施例的分布式串联补偿器的结构图；
图6是根据本申请第四实施例的分布式串联补偿器的控制方法计算机执行流程图；
图7是根据本申请第五实施例的分布式串联补偿器的控制方法计算机执行流程图；
图8是根据本申请第六实施例的分布式串联补偿器的控制方法计算机执行流程图；
图9A是根据本申请第七实施例的分布式串联补偿器的控制方法流程示意图；
图9B是根据本申请第七实施例的分布式串联补偿器的控制方法计算机执行流程图；
图10是根据本申请第八实施例的分布式串联补偿器的控制方法计算机执行流程图；
图11是根据本申请第九实施例的分布式串联补偿器的控制方法计算机执行流程图；
图12是根据本申请第一示例实施例的分布式串联补偿器的控制装置示意图；
图13是根据本申请第二示例实施例的分布式串联补偿器的控制装置示意图。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
应当理解，本申请的权利要求、说明书及附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序。本申请的说明书和权利要求书中使用的术语“包括”和“包含”指示所描述特征、整体、步骤、操作、元素和/或组件的存在，但并不排除一个或多个其它特征、整体、步骤、操作、元素、组件和/或其集合的存在或添加。
图1是根据本申请第一实施例的分布式串联补偿器的结构图；
如图1所示，分布式串联补偿器包括N级单元模组，每级包括三个单元模组分别对应接入三相交流线路，N级单元模组依次串联接入线路，N为自然数；上述单元模组包括第一类旁路设备、取能单元、换流单元和控制单元。
图2A所示是本申请第一实施例提供的一种分布式串联补偿器的启动方法示意图。
参见图2A，针对图1中的分布式串联补偿器的启动阶段，根据本申请的第一实施例，提供的控制方法包括如下步骤：
S110：收到启动命令后，通过取能单元给所有单元模组控制单元的电源充电；
S120：依次对各级单元模组执行步骤S121至S124的操作：
S121：分开本级单元模组的第一类旁路设备；
S122：对本级单元模组的换流单元充电，直至本级单元模组的直流电压充电至第一电压阈值；
S123：解锁换流单元；
S124：继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至第二电压阈值。
如图2B所示，上述控制方法的计算机执行流程包括如下步骤：
(a1)收到启动命令后，通过取能单元给控制单元的电源充电，充电结束后进入步骤(a2)；
(a2)分开第一级单元模组的第一类旁路设备，对第一级单元模组的换流单元进行充电，第一级单元模组的直流电压充电至设定的第一电压阈值后进入步骤(a3)；
(a3)解锁第一级单元模组的换流单元，第一级单元模组的直流电压充电至设定的第二电压阈值后进入步骤(a4)；
(a4)分开第二级单元模组的第一类旁路设备，对第二级单元模组的换流单元进行充电，第二级单元模组的直流电压充电至设定的第一电压阈值后进入步骤(a5)；
(a5)解锁第二级单元模组的换流单元，第二级单元模组的直流电压充电至设定的第二电压阈值后进入步骤(a6)；
(a6)按上述步骤(a2)和步骤(a3)依次将第三级至第N级单元模组的直流电压充电至设定的第二电压阈值，进入步骤(a7)；
(a7)线路稳定运行后，分布式串联补偿器进入正常的运行方式，完成启动过程。
图3是根据本申请第二实施例的分布式串联补偿器的控制方法计算机执行流程图。
针对图1中的分布式串联补偿器的启动阶段，根据本申请的第二实施例，提供的控制方法包括如下步骤：
S210：收到启动命令后，通过取能单元给控制单元的电源充电。
S220：对各级单元模组依次执行分开本级单元模组的第一类旁路设备对本级单元模组的换流单元开始充电的操作，每级单元模组的操作间隔为预设时间阈值；同时，当本级单元模组的直流电压充电至设定的第一电压阈值后，解锁本级单元模组的换流单元，继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至设定的第二电压阈值。
优选的实施例中，每级单元模组解锁换流单元后，先控制本级单元模组的直流电压充电至设定的第三电压阈值，然后控制本级单元模组的直流电压逐渐充电至设定的第二电压阈值；所述第三电压阈值大于第一电压阈值小于第二电压阈值。
参见图3，上述控制方法的计算机执行流程包括如下步骤：
(a1)收到启动命令后，通过取能单元给控制单元的电源充电，充电结束后进入步骤(a2)；
(a2)分开第一级单元模组的第一类旁路设备，对第一级单元模组的换流单元进行充电，经过设定的延迟T之后，进入步骤(a3)；同时，在一级单元模组的直流电压充电至设定的第一电压阈值后，解锁第一级单元模组的换流单元，控制第一级单元模组的直流电压至设定的第二电压阈值；
(a3)分开第二级单元模组的第一类旁路设备，对第二级单元模组的换流单元进行充电，经过设定的延迟T之后，进入步骤(a4)；同时，在第二级单元模组的直流电压充电至设定的第一电压阈值后，解锁第二级单元模组的换流单元，控制第二级单元模组的直流电压至设定的第二电压阈值；
(a4)按上述步骤(a2)和步骤(a3)和设定的延迟T，依次分开第三级至第N级单元模组的第一类旁路设备；并依次将第三级至第N级单元模组的直流电压充电至设定的第二电压阈值，进入步骤(a5)；
(a5)在第一级至第N级单元模组的直流电压达到设定的第二电压阈值后，所述分布式串联补偿器完成起动过程，进入正常的运行方式。
根据本申请示例实施例，上述控制方法中，第一电压阈值大于上述换流单元能成功解锁的最小直流电压；第二电压阈值不大于上述换流单元可正常运行的标称直流电压。
图4是根据本申请第三实施例的分布式串联补偿器的控制方法计算机执行流程图。
针对图1中的分布式串联补偿器的停运阶段，根据本申请的第三实施例，提供的控制方法包括如下步骤：
(b1)收到停运命令后，逐渐降低各级单元模组输出的交流电压；
(b2)所有单元模组输出的交流电压降至零后，合闸所有单元模组的第一类旁路设备，完成停运过程。
图5是根据本申请第二实施例的分布式串联补偿器的结构图。
参见图5，根据本申请第二实施的分布式串联补偿器还包括第二类旁路设备。第二类旁路设备与所有N级单元模组串联连接后的支路并联连接。其中，第一类旁路设备为机械开关或由电力电子器件构成的快速开关，合闸时间小于10ms；第二类旁路设备为快速机械旁路开关，其合闸时间比分闸时间快，合闸时间约为40ms左右。
图6是根据本申请第四实施例的分布式串联补偿器的控制方法计算机执行流程图。
参见图6，针对图5中所示的分布式串联补偿器的启动阶段，根据本申请第四实施例的控制方法，与图2B中所示的控制方法大致过程相同，区别在于步骤(a1)为：收到启动命令后，分开第二类旁路设备，通过取能单元给控制单元的电源充电，充电结束后进入步骤(a2)。
图7是根据本申请第五实施例的分布式串联补偿器的控制方法计算机执行流程图。
参见图7，针对图5中所示的分布式串联补偿器的启动阶段，根据本申请第五实施例的控制方法，与图3中所示的控制方法大致过程相同，区别在于步骤(a1)为：收到启动命令 后，分开第二类旁路设备，通过取能单元给控制单元的电源充电，充电结束后进入步骤(a2)。
图8是根据本申请第六实施例的分布式串联补偿器的控制方法计算机执行流程图。
参见图8，针对图5中所示的分布式串联补偿器的停运阶段，根据本申请第六实施例的控制方法，与图4中所示的控制方法大致过程相同，区别在于步骤(b1)为：所有单元模组输出的交流电压降至零后，同时合闸所有单元模组的第一类旁路设备和合闸第二类旁路设备，完成停运过程。
图9A是根据本申请第七实施例的分布式串联补偿器的控制方法流程示意图；图9B是根据本申请第七实施例的分布式串联补偿器的控制方法计算机执行流程图。
针对图1所示的分布式串联补偿器的启动阶段，还可增加第三电压阈值，第三电压阈值大于第一电压阈值小于第二电压阈值。增加第三电压阈值后，根据本申请第七示例实施的控制方法，参见图9A，包括如下步骤：
S310：收到启动命令后，通过取能单元给所有单元模组控制单元的电源充电；
S320：依次对各级单元模组执行步骤S321至S325的操作：
S321：分开本级单元模组的第一类旁路设备；
S322：对本级单元模组的换流单元充电，直至本级单元模组的直流电压充电至第一电压阈值；
S323：解锁换流单元；
S324：对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至第三电压阈值；
S325：继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至第二电压阈值。其中，第三电压阈值大于第一电压阈值小于第二电压阈值。
如图9B所示，图9A中所示的控制方法的计算机执行流程包括如下步骤：
(a1)收到启动命令后，通过取能单元给控制单元的电源充电，充电结束后进入步骤(a2)；
(a2)分开第一级单元模组的第一类旁路设备，对第一级单元模组的换流单元进行充电，第一级单元模组的直流电压充电至设定的第一电压阈值后进入步骤(a3)；
(a3)解锁第一级单元模组的换流单元，控制将第一级单元模组的直流电压充电至设定的第三电压阈值，然后控制将第一级单元模组的直流电压逐渐充电至设定的第二电压阈值，进入步骤(a4)；
(a4)分开第二级单元模组的第一类旁路设备，对第二级单元模组的换流单元进行充电，第二级单元模组的直流电压充电至设定的第一电压阈值后进入步骤(a5)；
(a5)解锁第二级单元模组的换流单元，控制将第一级单元模组的直流电压充电至设定的第三电压阈值，然后控制将第二级单元模组的直流电压逐渐充电至设定的第二电压阈值，进入步骤(a6)；
(a6)按上述步骤(a2)和步骤(a3)依次将第三级至第N级单元模组的直流电压充电至设定的第二电压阈值，进入步骤(a7)；
(a7)线路稳定运行后，分布式串联补偿器进入正常的运行方式，完成起动过程。
图10是根据本申请第八实施例的分布式串联补偿器的控制方法计算机执行流程图。
参见图10，针对图1所示的分布式串联补偿器的启动阶段，增加第三电压阈值后，根据本申请第八示例实施的控制方法计算机执行过程包括如下步骤：
(a1)收到启动命令后，通过取能单元给控制单元的电源充电，充电结束后进入步骤(a2)；
(a2)分开第一级单元模组的第一类旁路设备，对第一级单元模组的换流单元进行充电，经过设定的延迟T之后，进入步骤(a3)的同时，在一级单元模组的直流电压充电至设定的第一电压阈值后，解锁第一级单元模组的换流单元，控制第一级单元模组的直流电压充电至设定的第三电压阈值，然后控制将第一级单元模组的直流电压逐渐充电至设定的第二电压阈值；
(a3)分开第二级单元模组的第一类旁路设备，对第二级单元模组的换流单元进行充电，经过设定的延迟T之后，进入步骤(a4)的同时，在第二级单元模组的直流电压充电至设定的第一电压阈值后，解锁第二级单元模组的换流单元，控制第二级单元模组的直流电压充电至设定的第三电压阈值，然后控制将第一级单元模组的直流电压逐渐充电至设定的第二电压阈值；
(a4)按上述步骤(a2)和步骤(a3)和设定的延迟T，依次分开第三级至第N级单元模组的第一类旁路设备；并依次将第三级至第N级单元模组的直流电压逐渐充电至设定的第二电压阈值，进入步骤(a5)；
(a5)在第一级至第N级单元模组的直流电压达到设定的第二电压阈值后，所述分布式串联补偿器完成起动过程，进入正常的运行方式。
前述分开不同级单元模组第一旁路设备之间的延迟T，大于单元模组充电至第一电压阈值的时间。第三电压阈值大于第一电压阈值小于第二电压阈值。
图11是根据本申请第九实施例的分布式串联补偿器的控制方法计算机执行流程图。
针对图1所示的分布式串联补偿器的启动阶段，增加第三电压阈值后，根据本申请第九示例实施的控制方法中，可以将分开本级单元模组的第一类旁路设备、对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第一电压阈值、解锁换流单元、继续对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第三电压阈值定义为一个操作轮次。则，根据第九示例实施的控制方法包括如下步骤：
S410：收到启动命令后，通过取能单元给所有单元模组控制单元的电源充电；
S420：依次对各级单元模组执行如下操作：先执行本级单元模组的操作轮次，然后在进行下一级单元模组操作轮次的同时，本级单元模组的换流单元继续充电控制本级单元模组的直流电压充电至第二电压阈值。其中，第三电压阈值大于第一电压阈值小于第二电压阈值。
参见图11，根据本申请第九示例实施的控制方法计算机执行过程包括如下步骤：
(a1)收到启动命令后，通过取能单元给控制单元的电源充电，充电结束后进入步骤(a2)；
(a2)分开第一级单元模组的第一类旁路设备，对第一级单元模组的换流单元进行充电，第一级单元模组的直流电压充电至设定的第一电压阈值后进入步骤(a3)；
(a3)解锁第一级单元模组的换流单元，控制将第一级单元模组的直流电压充电至设定的第三电压阈值，进入步骤(a4)，同时控制将第一级单元模组的直流电压逐渐充电至设定的第二电压阈值；
(a4)分开第二级单元模组的第一类旁路设备，对第二级单元模组的换流单元进行充电，第二级单元模组的直流电压充电至设定的第一电压阈值后进入步骤(a5)；
(a5)解锁第二级单元模组的换流单元，控制将第一级单元模组的直流电压充电至设定的第三电压阈值，进入步骤(a6)，同时控制将第二级单元模组的直流电压逐渐充电至设定的第二电压阈值；
(a6)按上述步骤(a2)和步骤(a3)依次将第三级至第N级单元模组的直流电压充电至设定的第二电压阈值，进入步骤(a7)；
(a7)线路稳定运行后，分布式串联补偿器进入正常的运行方式，完成起动过程。
在本实例中所有的启动阶段的控制方法均是对于所有单元模组均正常的情况进行的描述，如有部分单元模组存在故障，本控制方法则跳过故障的单元模组或者跳过对故障的单元模组设置的启动延迟T；不对故障的单元模组进行启动操作，或者保留对故障的单元模组设置的启动延迟T、但不对故障的单元模组进行启动操作(即无论是否有单元模组发生故障，正常的单元模组都会在收到启动命令后的固定延迟开始启动)。如有单元模组在启动或停运的过程中发生了故障，则单元模组自主退出、不影响其它单元模组的启动和停运。
在本实施例中，所述第一电压阈值、第二电压阈值、第三电压阈值和固定延迟T，对于不同的工程、不同的分布式单元模组，电压阈值不同、固定延迟T也不同，此为公知技术， 不再赘述。
图12是根据本申请第一示例实施例的分布式串联补偿器的控制装置示意图。
本申请还提供一种分布式串联补偿器的控制装置。参见图12，针对分布式串联补偿器的启动阶段，根据本申请第一示例实施例的控制装置包括充电控制模块10和分级启动模块20，其中：
充电控制模块，用于收到启动命令后，通过取能单元给所有单元模组控制单元的电源充电；
分级启动模块，用于依次对各级单元模组执行如下操作：
分开本级单元模组的第一类旁路设备；
对本级单元模组的换流单元充电，直至本级单元模组的直流电压充电至第一电压阈值；
解锁换流单元；
继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至第二电压阈值。
优选的实施例中，所述第一电压阈值大于所述换流单元能成功解锁的最小直流电压；所述第二电压阈值不大于所述换流单元可正常运行的标称直流电压。
在其他实施例中，所述分级启动模块中，每级单元模组解锁换流单元后，先控制本级单元模组的直流电压充电至第三电压阈值，再控制本级单元模组的直流电压充电至第二电压阈值；所述第三电压阈值大于第一电压阈值小于第二电压阈值。
在其他实施例中，所述分级启动模块中，将分开本级单元模组的第一类旁路设备、对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第一电压阈值、解锁换流单元、继续对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第三电压阈值定义为一个操作轮次。依次对各级单元模组执行如下操作：先执行本级单元模组的操作轮次，然后在进行下一级单元模组操作轮次的同时，本级单元模组的换流单元继续充电控制本级单元模组的直流电压充电至第二电压阈值；所述第三电压阈值大于第一电压阈值小于第二电压阈值。
在其他实施例中，所述分级启动模块中，对各级单元模组依次执行分开本级单元模组的第一类旁路设备对本级单元模组的换流单元开始充电的操作，每级单元模组的操作间隔为预设时间阈值；当本级单元模组的直流电压充电至设定的第一电压阈值后，解锁本级单元模组的换流单元，继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至设定的第二电压阈值。
根据本申请的其他实施例，当分布式串联补偿器还包括第二类旁路设备，第二类旁路设备与所有N级单元模组串联连接后的支路并联连接。所述充电控制模块，收到启动命令后，先分开第二类旁路设备，再通过取能单元给控制单元的电源充电。
图13是根据本申请第二示例实施例的分布式串联补偿器的控制装置示意图。
参见图13，针对分布式串联补偿器的停运阶段，根据本申请第二示例实施例的控制装置包括：降压控制模块30和停运控制模块40。其中：
降压控制模块，用于收到停运命令后，逐渐降低各级单元模组输出的交流电压；
停运控制模块，用于所有单元模组输出的交流电压降至零后，合闸所有单元模组的第一类旁路设备，完成停运过程。
在其他实施例中，当所述分布式串联补偿器还包括第二类旁路设备，第二类旁路设备与所有N级单元模组串联连接后的支路并联连接。所述停运控制模块，在所有单元模组输出的交流电压降至零后，同时合闸所有单元模组的第一类旁路设备和合闸第二类旁路设备，完成停运过程。
应该理解，上述的装置实施例仅是示意性的。例如，上述实施例中所述单元/模块的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式。例如，多个单元、模块或组 件可以结合，或者可以集成到另一个系统，或一些特征可以忽略或不执行。所述集成的单元/模块如果以软件程序模块的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储器中。存储器包括：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
本发明以包含单个分布式串联补偿器来介绍实施方案，但本申请不限于该结构的串联补偿器系统，对包含串联联结变压器或包含并联补偿设备器分布式补偿器都适用。任何牵涉到分级起动，或者分模组级充电、分电压级解锁的方法，都属于本申请范围之内。
最后应该说明的是：结合上述实施例仅说明本发明的技术方案而非对其限制。所属领域的普通技术人员应当理解到：本领域技术人员可以对本发明的具体实施方式进行修改或者等同替换，但这些修改或变更均在申请待批的专利要求保护范围之内。

Claims (23)

  1. 一种分布式串联补偿器的控制方法，所述分布式串联补偿器包括N级单元模组，每级包括三个单元模组分别对应接入三相交流线路，N级单元模组依次串联接入线路，N为自然数；所述单元模组包括第一类旁路设备、取能单元、换流单元和控制单元；
    其中，所述控制方法包括：
    收到启动命令后，分级逐步投入所述N级单元模组的换流单元并达到设定的第一电压阈值后解锁所述换流单元；和/或
    收到停运命令后，逐渐降低所述N级单元模组输出的交流电压直至为零后退出所述单元模组。
  2. 根据权利要求1所述的控制方法，其中，所述收到启动命令后，分级逐步投入所述N级单元模组的换流单元并达到设定的第一电压阈值后解锁所述换流单元，包括：
    收到启动命令后，通过所述取能单元给所有单元模组控制单元的电源充电；
    依次对各级单元模组执行如下操作：
    分开本级单元模组的第一类旁路设备；
    对本级单元模组的换流单元充电，直至本级单元模组的直流电压充电至第一电压阈值；
    解锁换流单元；
    继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至第二电压阈值。
  3. 根据权利要求2所述的控制方法，其中，将分开本级单元模组的第一类旁路设备、对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第一电压阈值、解锁换流单元、继续对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第三电压阈值定义为一个操作轮次；
    依次对各级单元模组执行如下操作：先执行本级单元模组的操作轮次，然后在进行下一级单元模组操作轮次的同时，本级单元模组的换流单元继续充电控制本级单元模组的直流电压充电至第二电压阈值；
    所述第三电压阈值大于第一电压阈值小于第二电压阈值。
  4. 根据权利要求1所述的控制方法，其中，所述收到启动命令后，分级逐步投入所述N级单元模组的换流单元并达到设定的第一电压阈值后解锁所述换流单元，包括：
    收到启动命令后，通过取能单元给控制单元的电源充电；
    对各级单元模组依次执行分开本级单元模组的第一类旁路设备对本级单元模组的换流单元开始充电的操作，每级单元模组的操作间隔为预设时间阈值；
    当本级单元模组的直流电压充电至设定的第一电压阈值后，解锁本级单元模组的换流单元，继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至设定的第二电压阈值。
  5. 根据权利要求2或4所述的控制方法，其中，如有部分单元模组存在故障，则启动过程中跳过故障的单元模组；如有单元模组在启动过程中发生了故障，则故障单元模组自主退出、不影响其它单元模组的启动。
  6. 根据权利要求2或4所述的控制方法，其中，每级单元模组解锁换流单元后，所述控制方法还包括：
    先控制本级所述单元模组的直流电压充电至第三电压阈值，再控制本级所述单元模组的直流电压充电至第二电压阈值；
    所述第三电压阈值大于第一电压阈值小于第二电压阈值。
  7. 根据权利要求2或4所述的控制方法，其中，所述第一类旁路设备为机械开关或由电力电子器件构成的快速开关。
  8. 根据权利要求2或4所述的控制方法，其中，所述第一电压阈值大于所述换流单元能 成功解锁的最小直流电压；所述第二电压阈值不大于所述换流单元可正常运行的标称直流电压。
  9. 根据权利要求2或4所述的控制方法，其中，所述分布式串联补偿器还包括第二类旁路设备，第二类旁路设备与所有N级单元模组串联连接后的支路并联连接；
    其中，所述收到启动命令后，通过取能单元给控制单元的电源充电之前，所述控制方法还包括：
    分开所述第二类旁路设备。
  10. 根据权利要求9所述的控制方法，其中，所述第二类旁路设备为快速机械旁路开关，所述快速机械开关的合闸时间比分闸时间短。
  11. 根据权利要求1所述的控制方法，其中，所述收到停运命令后，逐渐降低所述N级单元模组输出的交流电压直至为零后退出所述单元模组，包括：
    收到所述停运命令后，逐渐降低各级所述单元模组输出的交流电压；
    所有所述单元模组输出的交流电压降至零后，合闸所有所述单元模组的所述第一类旁路设备，完成停运过程。
  12. 根据权利要求11所述的控制方法，其中，所述分布式串联补偿器还包括第二类旁路设备，第二类旁路设备与所有N级单元模组串联连接后的支路并联连接；
    其中，所有所述单元模组输出的交流电压降至零后，所述控制方法还包括：
    同时合闸所有所述单元模组的所述第一类旁路设备和所述第二类旁路设备，完成停运过程。
  13. 根据权利要求11所述的控制方法，其中，所述收到停运命令后，所述控制方法还包括：
    如所述单元模组在停运过程中发生故障，则故障的所述单元模组自动退出、不影响其它所述单元模组的停运。
  14. 一种分布式串联补偿器的控制装置，所述分布式串联补偿器包括N级单元模组，每级包括三个单元模组分别对应接入三相交流线路，N级单元模组依次串联接入线路，N为自然数；所述单元模组包括第一类旁路设备、取能单元、换流单元和控制单元；
    其中，所述控制装置包括：
    第一控制模块，用于收到启动命令后，分级逐步投入所述N级单元模组的换流单元并达到设定的第一电压阈值后解锁所述换流单元；和/或
    第二控制模块，用于收到停运命令后，逐渐降低所述N级单元模组输出的交流电压直至为零后退出所述单元模组。
  15. 根据权利要求14所述的控制装置，其中，所述第一控制模块，包括：
    充电控制子模块，用于收到所述启动命令后，通过所述取能单元给所有单元模组控制单元的电源充电；
    分级启动子模块，用于依次对各级单元模组执行如下操作：
    分开本级单元模组的第一类旁路设备；
    对本级单元模组的换流单元充电，直至本级单元模组的直流电压充电至第一电压阈值；
    解锁换流单元；
    继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至第二电压阈值。
  16. 根据权利要求15所述的控制装置，其中，所述分级启动子模块中，将分开本级单元模组的第一类旁路设备、对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第一电压阈值、解锁换流单元、继续对本级单元模组的换流单元充电控制本级单元模组的直流电压充电至第三电压阈值定义为一个操作轮次；
    依次对各级单元模组执行如下操作：先执行本级单元模组的操作轮次，然后在进行下一 级单元模组操作轮次的同时，本级单元模组的换流单元继续充电控制本级单元模组的直流电压充电至第二电压阈值；所述第三电压阈值大于第一电压阈值小于第二电压阈值。
  17. 根据权利要求14所述的控制装置，其中，所述第一控制模块，包括：
    充电控制子模块，用于收到启动命令后通过取能单元给控制单元的电源充电；
    分级启动子模块，用于对各级单元模组依次执行分开本级单元模组的第一类旁路设备对本级单元模组的换流单元开始充电的操作，每级单元模组的操作间隔为预设时间阈值；当本级单元模组的直流电压充电至设定的第一电压阈值后，解锁本级单元模组的换流单元，继续对本级单元模组的换流单元充电，控制本级单元模组的直流电压充电至设定的第二电压阈值。
  18. 根据权利要求15或17所述的控制装置，其中所述分级启动子模块中，每级单元模组解锁换流单元后，先控制本级单元模组的直流电压充电至第三电压阈值，再控制本级单元模组的直流电压充电至第二电压阈值；所述第三电压阈值大于第一电压阈值小于第二电压阈值。
  19. 根据权利要求15或17所述的控制装置，其中，所述第一电压阈值大于所述换流单元能成功解锁的最小直流电压；所述第二电压阈值不大于所述换流单元可正常运行的标称直流电压。
  20. 根据权利要求15或17所述的控制装置，其中，所述分布式串联补偿器还包括第二类旁路设备，第二类旁路设备与所有N级单元模组串联连接后的支路并联连接；
    其中，所述充电控制子模块，收到启动命令后，先分开第二类旁路设备，再通过取能单元给控制单元的电源充电。
  21. 根据权利要求14所述的控制装置，其中，所述第二控制模块包括：
    降压控制子模块，用于收到所述停运命令后，逐渐降低各级所述单元模组输出的交流电压；
    停运控制子模块，用于所有所述单元模组输出的交流电压降至零后，合闸所有所述单元模组的所述第一类旁路设备，完成停运过程。
  22. 根据权利要求21所述的控制装置，其中，所述分布式串联补偿器还包括第二类旁路设备，第二类旁路设备与所有N级单元模组串联连接后的支路并联连接；
    其中，所述停运控制子模块还被配置为：
    所有所述单元模组输出的交流电压降至零后，同时合闸所有所述单元模组的所述第一类旁路设备和所述第二类旁路设备，完成停运过程。
  23. 一种计算机可读介质，其上存储有计算机程序，其中，所述程序被处理器执行时实现权利要求1-13中任一所述的控制方法。
PCT/CN2021/113298 2020-11-03 2021-08-18 分布式串联补偿器的控制方法、装置及计算机可读介质 Ceased WO2022095545A1 (zh)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN202011212971.4 2020-11-03
CN202011212971.4A CN112491077B (zh) 2020-11-03 2020-11-03 一种分布式串联补偿器的控制方法及装置
CN202011212914.6 2020-11-03
CN202011212914.6A CN112491076B (zh) 2020-11-03 2020-11-03 分布式串联补偿器的启动和停运方法、装置及存储介质

Publications (1)

Publication Number Publication Date
WO2022095545A1 true WO2022095545A1 (zh) 2022-05-12

Family

ID=81457499

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/113298 Ceased WO2022095545A1 (zh) 2020-11-03 2021-08-18 分布式串联补偿器的控制方法、装置及计算机可读介质

Country Status (1)

Country Link
WO (1) WO2022095545A1 (zh)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105553248A (zh) * 2016-01-28 2016-05-04 中国科学院等离子体物理研究所 一种用于多台大功率变流器串联运行的启动方法
WO2017138998A1 (en) * 2016-02-11 2017-08-17 Smart Wires Inc. System and method for distributed grid control with sub-cyclic local response capability
CN107910870A (zh) * 2017-11-24 2018-04-13 许继电气股份有限公司 一种分布式静止串联补偿器的投退控制方法及装置
CN110299711A (zh) * 2019-05-28 2019-10-01 中电普瑞科技有限公司 一种静止同步串联补偿系统及方法
CN112491077A (zh) * 2020-11-03 2021-03-12 南京南瑞继保电气有限公司 一种分布式串联补偿器的控制方法及装置
CN112491076A (zh) * 2020-11-03 2021-03-12 南京南瑞继保电气有限公司 分布式串联补偿器的启动和停运方法、装置及存储介质

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105553248A (zh) * 2016-01-28 2016-05-04 中国科学院等离子体物理研究所 一种用于多台大功率变流器串联运行的启动方法
WO2017138998A1 (en) * 2016-02-11 2017-08-17 Smart Wires Inc. System and method for distributed grid control with sub-cyclic local response capability
CN107910870A (zh) * 2017-11-24 2018-04-13 许继电气股份有限公司 一种分布式静止串联补偿器的投退控制方法及装置
CN110299711A (zh) * 2019-05-28 2019-10-01 中电普瑞科技有限公司 一种静止同步串联补偿系统及方法
CN112491077A (zh) * 2020-11-03 2021-03-12 南京南瑞继保电气有限公司 一种分布式串联补偿器的控制方法及装置
CN112491076A (zh) * 2020-11-03 2021-03-12 南京南瑞继保电气有限公司 分布式串联补偿器的启动和停运方法、装置及存储介质

Similar Documents

Publication Publication Date Title
CN107862405B (zh) 计及微网作为黑启动电源的电力系统网架重构优化方法
AU2023214327A1 (en) Systems and methods for integrated microgrid management system in electric power systems
CN112491076B (zh) 分布式串联补偿器的启动和停运方法、装置及存储介质
CN111697591B (zh) 蜂巢状多站融合配电网系统及其运行控制方法
CN103280799A (zh) 一种统一潮流控制器的起停方法
CN112271727A (zh) 含柔性软开关的韧性配电网的故障恢复方法
CN107681700B (zh) 一种交直流混合微电网运行模式转换方法
CN107910887B (zh) 一种考虑高压直流输电系统参与的黑启动方法
CN110334862A (zh) 考虑恢复时间的电力系统分区优化算法
CN115549067A (zh) 一种考虑区域划分、恢复路径及供电顺序协同的配电网顺序恢复优化方法
CN113098062A (zh) 微电网黑启动的控制方法、装置、电子设备和存储介质
CN110429643B (zh) 用于集散式光伏直流汇集系统的级间协同启动系统及方法
CN112491077B (zh) 一种分布式串联补偿器的控制方法及装置
Li et al. A converter-based battery energy storage system emulator for the controller testing of a microgrid with dynamic boundaries and multiple source locations
CN108155641B (zh) 考虑直流输电系统启动顺序和恢复过程的系统恢复方法
CN118449137A (zh) 一种多类型电源协同的配网灾后主动恢复方法及系统
CN111668862B (zh) 一种储能系统黑启动顺控方法
CN113162026B (zh) 一种基于vsc的交直流混合配电网故障恢复方法和系统
Pradhan et al. Coordinated control strategy for a DC microgrid with low bandwidth communication
CN110994601A (zh) 一种基于储能系统的配电网黑启动方法
WO2022095545A1 (zh) 分布式串联补偿器的控制方法、装置及计算机可读介质
Chen et al. A multi-objective optimization method of blackstart restoration utilizing HVDC links
CN109599893B (zh) 一种考虑光伏和储能的负荷恢复算法
Li et al. A module-based hierarchical microgrid with a bottom-up building architecture for rural electrification
CN106340899A (zh) 一种以减少用户停电损失目标的动态孤岛划分方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21888244

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21888244

Country of ref document: EP

Kind code of ref document: A1