CN110336312B - VSC power control method and device - Google Patents
VSC power control method and device Download PDFInfo
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- CN110336312B CN110336312B CN201910600386.2A CN201910600386A CN110336312B CN 110336312 B CN110336312 B CN 110336312B CN 201910600386 A CN201910600386 A CN 201910600386A CN 110336312 B CN110336312 B CN 110336312B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—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 a high-tension dc link
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- 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]
Abstract
The invention relates to a VSC power control method and a device, which detect the DC voltage of VSC, and when the DC voltage of VSC is in the set overvoltage range, control the DC reference value in the VSC power control to change along with the change of the DC voltage of VSC and to be positive correlation change; the obtained direct current reference value is differed from the actual VSC direct current bus current, and the active current reference value of the VSC is output after PI regulation; and performing VSC power control according to the obtained active current reference value and reactive current reference value. Then, when a fault that causes the direct voltage of the VSC to rise occurs, the direct current reference value in the power control of the VSC is correspondingly increased, and then the active current reference value of the VSC is increased, and the output active power of the VSC is increased, so that the power surplus of the VSC is reduced, and the suppression of the direct voltage rise of the VSC is facilitated.
Description
Technical Field
The invention relates to a VSC power control method and device.
Background
The conventional extra-high voltage direct current transmission system usually uses a phase-change type converter LCC, but the phase-change type converter LCC cannot avoid system transmission power interruption caused by phase-change failure. Therefore, the hybrid dc transmission system is more and more widely used, and generally, the inverter station uses a voltage source converter VSC or a combination of an LCC and a VSC. The VSC of the voltage source converter has no commutation failure, and active power and reactive power can be independently controlled without configuring an alternating current filter. The combination of LCC and VSC can to some extent prevent commutation failure and suppress system power interruption due to commutation failure. However, whether a conventional dc transmission system including VSCs or a hybrid dc transmission system including VSCs, for example: high-end LCC mixes direct current transmission system with the cascaded extra-high voltage of a plurality of VSC of low-end in the contravariant station, when taking place to lead to the trouble that VSC direct current voltage rose, for example contravariant station high-end LCC commutation fails, and the increase of polar current can lead to VSC submodule piece electric capacity voltage to rise, and VSC's direct current voltage also can rise correspondingly. However, the existing VSC power control method cannot effectively suppress the increase of the capacitance voltage of the VSC sub-module, that is, the VSC direct-current voltage.
Disclosure of Invention
The invention aims to provide a VSC power control method, which is used for solving the problem that the existing VSC power control mode cannot effectively inhibit the increase of the capacitor voltage of a VSC sub-module. The invention also provides a VSC power control device, which is used for solving the problem that the existing VSC power control mode cannot effectively inhibit the increase of the capacitance voltage of the VSC sub-module.
In order to achieve the above object, an aspect of the present invention includes a VSC power control method including the steps of:
(1) When a fault that the direct current voltage of the VSC is increased occurs, detecting the direct current voltage of the VSC, and when the direct current voltage of the VSC is within a set overvoltage range, controlling a direct current reference value in VSC power control to change along with the change of the direct current voltage of the VSC, wherein the change of the direct current voltage of the VSC is in positive correlation with the change of the direct current reference value in VSC power control;
(2) The obtained direct current reference value is differed from the actual VSC direct current bus current, and the active current reference value of the VSC is output after PI regulation;
(3) And performing VSC power control according to the obtained active current reference value and reactive current reference value.
When the trouble that takes place to make the direct current voltage of VSC rise, can lead to VSC submodule piece capacitance voltage to rise, the direct current voltage of VSC rises, then, direct current reference value in the VSC power control just correspondingly increases, and then the active current reference value of VSC just increases, and VSC output active power will increase to reduce the power surplus of VSC, be favorable to restraining VSC submodule piece voltage to rise, restrain VSC's direct current voltage promptly and rise. Therefore, the active current reference value of the VSC is dynamically adjusted according to the VSC direct voltage, and then the active power of the VSC is dynamically adjusted, so that the surplus of the VSC power caused by fault is reduced, and the increase of the VSC direct voltage can be effectively inhibited.
Further, in order to improve the control reliability, in the step (1), when the direct-current voltage of the VSC is less than or equal to the lower limit value of the set overvoltage range, controlling a direct-current reference value in the VSC power control as the input direct-current reference value; and when the direct current voltage of the VSC is greater than or equal to the upper limit value of the set overvoltage range, controlling the direct current reference value in the VSC power control to be the maximum direct current set reference value.
Further, in order to improve the control reliability, in step (1), the dc current reference value in the VSC power control is linearly changed with a change in the dc voltage of the VSC.
Further, in order to improve the reliability of obtaining the reactive current reference value, in step (3), the process of obtaining the reactive current reference value is as follows: and calculating a difference value between the VSC reactive power reference value and the VSC reactive power actual value, and outputting the reactive current reference value after the obtained difference value is subjected to PI regulation.
Further, in order to improve the control reliability, in step (3), the control process of performing VSC power control according to the obtained active current reference value and reactive current reference value is implemented as follows: inputting the active current reference value and the reactive current reference value into the inner loop current control, and generating VSC control pulses by combining the VSC active current actual value, the VSC reactive current actual value, the VSC network side active voltage actual value and the VSC network side reactive voltage actual value.
The invention also provides a VSC power control device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein a process implemented by the processor when executing the computer program comprises the steps of:
(1) When a fault that the direct current voltage of the VSC is increased occurs, detecting the direct current voltage of the VSC, and when the direct current voltage of the VSC is within a set overvoltage range, controlling the direct current reference value in the VSC power control to change along with the change of the direct current voltage of the VSC, wherein the change of the direct current voltage of the VSC is in positive correlation with the change of the direct current reference value in the VSC power control;
(2) The obtained direct current reference value is differed from the actual VSC direct current bus current, and the active current reference value of the VSC is output after PI regulation;
(3) And performing VSC power control according to the obtained active current reference value and reactive current reference value.
When the trouble that takes place to make the direct current voltage of VSC rise, can lead to VSC submodule piece capacitance voltage to rise, the direct current voltage of VSC rises, then, direct current reference value in the VSC power control just correspondingly increases, and then the active current reference value of VSC just increases, and VSC output active power will increase to reduce the power surplus of VSC, be favorable to restraining VSC submodule piece voltage to rise, restrain VSC's direct current voltage promptly and rise. Therefore, according to the active current reference value of VSC direct current voltage dynamic adjustment VSC, and then the active power of dynamic adjustment VSC has reduced the surplus of VSC power that leads to because of the fault to can effectively restrain the VSC direct current voltage and rise.
Further, in order to improve the control reliability, in the step (1), when the direct-current voltage of the VSC is less than or equal to the lower limit value of the set overvoltage range, controlling a direct-current reference value in the VSC power control as the input direct-current reference value; and when the direct current voltage of the VSC is greater than or equal to the upper limit value of the set overvoltage range, controlling the direct current reference value in the VSC power control to be the maximum direct current set reference value.
Further, in order to improve the control reliability, in step (1), the dc current reference value in the VSC power control is linearly changed with a change in the dc voltage of the VSC.
Further, in order to improve the reliability of obtaining the reactive current reference value, in step (3), the process of obtaining the reactive current reference value is as follows: and calculating a difference value between the VSC reactive power reference value and the VSC reactive power actual value, and outputting the reactive current reference value after the obtained difference value is subjected to PI regulation.
Further, in order to improve the control reliability, in step (3), the control process of performing VSC power control according to the obtained active current reference value and reactive current reference value is implemented as follows: inputting the active current reference value and the reactive current reference value into the inner loop current control, and generating VSC control pulses by combining the VSC active current actual value, the VSC reactive current actual value, the VSC network side active voltage actual value and the VSC network side reactive voltage actual value.
Drawings
Fig. 1 is a topology diagram of a hybrid dc power transmission system provided by the present invention;
FIG. 2 is a schematic diagram of a VSC power control method provided by the present invention;
fig. 3 is a functional diagram of the VSC overvoltage leakage current provided by the invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the present embodiment provides a hybrid dc power transmission system, which is an extra-high voltage hybrid dc power transmission system. The rectification station of the hybrid direct-current transmission system is the same as the conventional extra-high voltage hybrid direct-current transmission system and comprises two LCC valve banks, wherein each LCC valve bank is composed of two LCCs (power grid phase conversion converters); the high-end valve bank of the inverter station is an LCC valve bank which comprises two LCCs, and the low end of the inverter station is connected with three VSCs (voltage source converters) in parallel. In fig. 1, the dc side of the VSC is connected in parallel with the controllable lightning arrester, the ACF is an ac filter, and the DCF is a dc filter. Of course, this embodiment only illustrates the VSC power control method provided by the present invention through the hybrid dc power transmission system shown in fig. 1. The present invention is mainly directed to a VSC power control method, and is not limited to a hybrid dc power transmission system to which the power control method is specifically applied, that is, the present invention is not limited to the specific structure of the hybrid dc power transmission system shown in fig. 1, and the VSC power control method provided by the present invention is applicable to a dc power transmission system as long as VSCs are involved therein, regardless of the modification of the dc power transmission system.
As shown in fig. 2, the VSC power control method mainly includes dc voltage control, dc current control, reactive power control, and inner loop current control, and accordingly, these controls can be expressed as software controllers, that is, a dc voltage controller, a dc current controller, a reactive power controller, and an inner loop current controller.
The purpose of the dc voltage controller and the dc current controller is to generate and output an active current reference value of the VSC, i.e., a d-axis current reference value idref (hereinafter referred to as the d-axis current reference value idref) of the valve side current of the VSC, and to select which control mode of the dc voltage controller and the dc current controller is to be used by the current mode selector. Generally, when a system is normal, the d-axis current reference value idref is output by using the direct current voltage controller, and when a fault that the direct current voltage of the VSC is increased occurs in the system, such as a fault that the phase commutation of the high-end LCC of the inverter station fails, the d-axis current reference value idref is output by using the direct current controller. The invention is characterized in that the dc current controller is adopted when a fault occurs, and is not limited to the control mode adopted when the system is normal, and a dc voltage controller can be adopted, other control modes can be adopted, and a dc current controller can be adopted on the premise of meeting the requirement of normal operation.
The direct current controller is provided with an overvoltage current leakage function, and outputs an adjusted direct current reference value (also called as a VSC direct current instruction value) Idcord after passing through the overvoltage current leakage function according to a direct current voltage UdcVSC of the VSC and a direct current reference value (namely, an input direct current reference value or a direct current initial reference value) Idcref calculated and output by superior control, namely the Idcref is input of the overvoltage current leakage function, and the Idcord is output of the overvoltage current leakage function. The overpressure and leakage functions are as follows: setting an overvoltage range, wherein the lower limit value of the overvoltage range is the rated dc voltage UdcN of the VSC, the upper limit value of the overvoltage range is Udcu, and Udcu is the minimum dc voltage of the VSC overvoltage leakage function corresponding to Idcmax, of course, the lower limit value and the upper limit value of the overvoltage range can be specifically set according to practical situations, when the dc voltage udcvcc of the VSC is within the overvoltage range, the control dc reference value Idcord changes with the change of the dc voltage udcc VSC of the VSC, and the change of the dc voltage udcc VSC of the VSC is positively correlated with the change of the dc reference value Idcord, and in order to improve the control reliability, the dc reference value Idcord linearly changes with the change of the dc voltage udcc VSC of the VSC, as shown in fig. 3, for example: when the direct current voltage UdcVSC of the VSC is gradually increased, the direct current reference value Idcord, namely the output Idcord of the overvoltage current leakage function is linearly increased; when the direct current voltage UdcVSC of the VSC is smaller than or equal to the lower limit value of the overvoltage range, namely the rated direct current voltage UdcN of the VSC, controlling the direct current reference value Idcord to be the input direct current reference value Idcref; and when the direct current voltage UdcVSC of the VSC is greater than or equal to the upper limit value Udcu of the overvoltage range, controlling the direct current reference value Idcord to be a maximum direct current setting reference value, wherein the maximum direct current setting reference value is the maximum direct current Idcmax allowed by the VSC. Therefore, the overpressure and relief function has the following characteristics: when the direct-current voltage UdcVSC of the VSC is smaller than or equal to the rated direct-current voltage UdcN of the VSC, the output of the overvoltage current leakage function is equal to the input Idcref; when the direct-current voltage UdcVSC of the VSC is gradually increased, the output Idcord of the overvoltage current leakage function is linearly increased; when the direct-current voltage UdcVSC of the VSC is greater than or equal to Udcu, the output Idcord of the overvoltage bleeder function is limited to Idcmax.
As shown in fig. 2, the dc reference value Idcord is different from the VSC dc actual value IdcVSC, and the d-axis current reference value idref is output after PI regulation. As shown in fig. 2, the reactive power controller is configured to output a reactive current reference value, i.e., a VSC valve side current q-axis current reference value iqref (hereinafter, referred to as q-axis current reference value iqref), specifically: and calculating a difference value between the VSC reactive power reference value Qref and the VSC reactive power actual value Q, and outputting a Q-axis current reference value iqref after the obtained difference value is subjected to PI regulation.
Then, the d-axis current reference value idref and the q-axis current reference value iqref are input to the inner-loop current controller, and a VSC control pulse is generated to control the VSC, such as generating a VSC modulation wave Vabc first and then generating a VSC control pulse from the VSC modulation wave Vabc, in combination with the VSC active current actual value (i.e., the VSC valve side current d-axis current actual value id), the VSC reactive current actual value (i.e., the VSC valve side current q-axis current actual value iq), the VSC network side active voltage actual value (i.e., the VSC network side voltage d-axis voltage actual value Ud), and the VSC network side reactive voltage actual value (i.e., the VSC network side voltage q-axis voltage actual value Uq).
Then, when the system has a fault which raises the direct current voltage of the VSC, such as a fault of phase commutation failure of a high-end LCC of an inverter station, the polar current is increased, which causes the capacitance voltage of a VSC sub-module to rise, the direct current voltage of the VSC rises, the overvoltage bleeder function detects that the direct current voltage of the VSC is higher, the direct current reference value Idcord is increased, the direct current controller increases the d-axis current reference value idref, the active power output by the VSC will increase, thereby reducing the power surplus of the VSC, and being beneficial to inhibiting the voltage rise of the VSC sub-module, namely, the direct current voltage of the VSC rises.
In the above embodiment, the control modes when the dc voltage udccvsc of the VSC is less than or equal to the rated dc voltage UdcN of the VSC and when the dc voltage udccvsc of the VSC is greater than or equal to Udcu are given, but this is only a specific embodiment, and as another embodiment, when the dc voltage udccvsc of the VSC is in these two ranges, another value-given mode may be adopted or another control mode different from the above control process may be directly adopted.
In addition, since the reactive power controller and the inner loop current controller belong to the conventional control function of the VSC, the q-axis current reference value iqref is not limited to be obtained by using the reactive power controller shown in fig. 2, and may be obtained by using other control processes; further, the VSC control pulses are not limited to being generated by the inner loop current controller shown in fig. 2, and may be obtained by another control process.
The specific embodiments are given above, but the present invention is not limited to the described embodiments. The basic idea of the present invention lies in the above basic scheme, and it is obvious to those skilled in the art that no creative effort is needed to design various modified models, formulas and parameters according to the teaching of the present invention. Variations, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit of the invention, and still fall within the scope of the invention.
The VSC power control method described above may also be stored as a computer program in a memory in the VSC power control device and executed by a processor in the VSC power control device.
Claims (8)
1. A VSC power control method, comprising the steps of:
(1) When a fault that the direct current voltage of the VSC is increased occurs, detecting the direct current voltage of the VSC, and when the direct current voltage of the VSC is within a set overvoltage range, controlling the direct current reference value in the VSC power control to change along with the change of the direct current voltage of the VSC, wherein the change of the direct current voltage of the VSC is in positive correlation with the change of the direct current reference value in the VSC power control;
(2) The obtained direct current reference value is differed from the actual VSC direct current bus current, and the active current reference value of the VSC is output after PI regulation;
(3) Performing VSC power control according to the obtained active current reference value and reactive current reference value, wherein the reactive current reference value is obtained in the following process: and calculating a difference value between the VSC reactive power reference value and the VSC reactive power actual value, and outputting the reactive current reference value after the obtained difference value is subjected to PI regulation.
2. A VSC power control method according to claim 1, characterised in that in step (1), when the dc voltage of the VSC is less than or equal to the lower limit value of the set overvoltage range, the dc current reference value in the VSC power control is controlled to be the input dc current reference value; and when the direct current voltage of the VSC is greater than or equal to the upper limit value of the set overvoltage range, controlling the direct current reference value in the VSC power control to be the maximum direct current set reference value.
3. A VSC power control method according to claim 1 or 2, characterised in that in step (1) the dc current reference in the VSC power control varies linearly with the variation of the dc voltage of the VSC.
4. A VSC power control method according to claim 1 or 2, characterized in that in step (3), the control procedure for performing VSC power control based on the obtained active current reference value and reactive current reference value is: inputting the active current reference value and the reactive current reference value into the inner loop current control, and generating VSC control pulses by combining the VSC active current actual value, the VSC reactive current actual value, the VSC network side active voltage actual value and the VSC network side reactive voltage actual value.
5. A VSC power control apparatus comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein a process implemented by the processor when executing the computer program comprises the steps of:
(1) When a fault that the direct current voltage of the VSC is increased occurs, detecting the direct current voltage of the VSC, and when the direct current voltage of the VSC is within a set overvoltage range, controlling the direct current reference value in the VSC power control to change along with the change of the direct current voltage of the VSC, wherein the change of the direct current voltage of the VSC is in positive correlation with the change of the direct current reference value in the VSC power control;
(2) The obtained direct current reference value is differed from the actual VSC direct current bus current, and the active current reference value of the VSC is output after PI regulation;
(3) Performing VSC power control according to the obtained active current reference value and reactive current reference value, wherein the reactive current reference value is obtained in the following process: and calculating a difference value between the VSC reactive power reference value and the VSC reactive power actual value, and outputting the reactive current reference value after the obtained difference value is subjected to PI regulation.
6. A VSC power control device according to claim 5, characterized in that in step (1), when the DC voltage of the VSC is less than or equal to the lower limit value of the set overvoltage range, the DC reference value in the VSC power control is controlled to be the input DC reference value; and when the direct current voltage of the VSC is greater than or equal to the upper limit value of the set overvoltage range, controlling the direct current reference value in the VSC power control to be the maximum direct current set reference value.
7. A VSC power control arrangement according to claim 5 or 6, characterized in that in step (1), the DC reference in the VSC power control varies linearly with the variation of the DC voltage of the VSC.
8. A VSC power control device according to claim 5 or 6, characterized in that in step (3), the control procedure for VSC power control according to the obtained active and reactive current reference values is: and inputting the active current reference value and the reactive current reference value into inner-loop current control, and generating VSC control pulse by combining the actual VSC active current value, the actual VSC reactive current value, the actual VSC network side active voltage value and the actual VSC network side reactive voltage value.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995022848A1 (en) * | 1994-02-17 | 1995-08-24 | Asea Brown Boveri Ab | Converter assembly for power transmission by means of high-voltage direct current |
| CN103368170A (en) * | 2013-06-26 | 2013-10-23 | 许继集团有限公司 | Converter and control method of multi-end soft direct current power transmission system |
| CN105720598A (en) * | 2016-03-09 | 2016-06-29 | 全球能源互联网研究院 | Calculation method for fixed DC voltage controller parameter of voltage source converter |
| CN105896585A (en) * | 2016-04-28 | 2016-08-24 | 南方电网科学研究院有限责任公司 | AC side fault ride-through control method for hybrid multi-terminal DC transmission system |
| CN105958523A (en) * | 2016-06-01 | 2016-09-21 | 许继电气股份有限公司 | Parallel connection three-terminal direct current power transmission system and power coordination control method of the same |
| CN108321829A (en) * | 2018-01-05 | 2018-07-24 | 南京南瑞继保电气有限公司 | Tape jam passes through the Hybrid HVDC system failure processing unit and method of function |
| CN108988373A (en) * | 2018-06-21 | 2018-12-11 | 中国电力科学研究院有限公司 | A kind of method and system for being controlled Hybrid HVDC system receiving end AC fault |
| CN109617113A (en) * | 2018-12-19 | 2019-04-12 | 南京南瑞继保电气有限公司 | The device and method mutually converted for dc power and AC power control target |
-
2019
- 2019-07-04 CN CN201910600386.2A patent/CN110336312B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995022848A1 (en) * | 1994-02-17 | 1995-08-24 | Asea Brown Boveri Ab | Converter assembly for power transmission by means of high-voltage direct current |
| CN103368170A (en) * | 2013-06-26 | 2013-10-23 | 许继集团有限公司 | Converter and control method of multi-end soft direct current power transmission system |
| CN105720598A (en) * | 2016-03-09 | 2016-06-29 | 全球能源互联网研究院 | Calculation method for fixed DC voltage controller parameter of voltage source converter |
| CN105896585A (en) * | 2016-04-28 | 2016-08-24 | 南方电网科学研究院有限责任公司 | AC side fault ride-through control method for hybrid multi-terminal DC transmission system |
| CN105958523A (en) * | 2016-06-01 | 2016-09-21 | 许继电气股份有限公司 | Parallel connection three-terminal direct current power transmission system and power coordination control method of the same |
| CN108321829A (en) * | 2018-01-05 | 2018-07-24 | 南京南瑞继保电气有限公司 | Tape jam passes through the Hybrid HVDC system failure processing unit and method of function |
| CN108988373A (en) * | 2018-06-21 | 2018-12-11 | 中国电力科学研究院有限公司 | A kind of method and system for being controlled Hybrid HVDC system receiving end AC fault |
| CN109617113A (en) * | 2018-12-19 | 2019-04-12 | 南京南瑞继保电气有限公司 | The device and method mutually converted for dc power and AC power control target |
Non-Patent Citations (3)
| Title |
|---|
| LCC与VSC级联的特高压混合直流输电系统控制策略;彭忠等;《电力系统保护与控制》;20211001;第49卷(第19期);第162-172页 * |
| VSC-HVDC系统新型广义直流电压控制策略;张静等;《电力系统自动化》;20081110;第32卷(第21期);第46-50页 * |
| 一种适用于柔性直流配电网的电压控制策略;季一润等;《中国电机工程学报》;20160120;第36卷(第2期);第335-341页 * |
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