CN104134968A - Protection method and system for unified power flow controller - Google Patents
Protection method and system for unified power flow controller Download PDFInfo
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- CN104134968A CN104134968A CN201410382299.1A CN201410382299A CN104134968A CN 104134968 A CN104134968 A CN 104134968A CN 201410382299 A CN201410382299 A CN 201410382299A CN 104134968 A CN104134968 A CN 104134968A
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Abstract
The invention provides a protection method and system for a unified power flow controller. The partitioning and layering method is adopted and includes the steps that the unified power flow controller is firstly partitioned according to the number of current converters; partition protection is carried out on each current converter area according to an alternating current protection area, a converter valve protection area and a direct current pole protection area; meanwhile, layered protection is carried out on the converter valve areas according to a converter valve layer and a valve element layer. The protection system is characterized in that according to the characteristic that a series connection side transformer is connected into a line in series, a PT is additionally arranged on the line to enable a series connection transformer primary winding to be arranged between the PT and a CT of an original line, a series connection transformer line side winding is brought into a line protection range, and meanwhile the additionally-arranged line PT is adopted for line protection. The protection method and system are simple and reliable, all areas of a UPFC device are covered, UPFC protection is matched with original alternating current system protection, the protected ranges are intersected, it is guaranteed that protected dead zones do not exist, and the motion reliability of the integral system is improved.
Description
Technical field
The invention belongs to flexible transmission field in electric power system, be specifically related to a kind of guard method and system of THE UPFC.
Background technology
Along with the use of the interconnected and various new equipments of large-scale power system, making generating, transmit electricity scale and complexity more economical, that also increased more efficiently electric power system simultaneously; Add a large amount of distributed generation system access electrical networks, make traditional fixing trend being transmitted to power distribution network by power transmission network occur reverse; The continuous growth of customer charge needs trend control device to improve existing power delivery ability; Just between flourish intelligent grid and electricity market, complicated Power Exchange needs tide optimization frequently to control.
THE UPFC, claim again UPFC (Unified Power Flow Controller), it is the best tidal current controller of versatility so far, the simplest UPFC is connected by direct current common port by two identical voltage source converters, can be regarded as a STATCOM (STATCOM) and a Static Series Synchronous Compensator (SSSC) formation in parallel, only by changing control law, just can be respectively or simultaneously and realize rapidly the different control functions such as shunt compensation, series compensation and phase shift, improve the performance of electric power system.
As shown in Figure 1, in figure, 1 is shunt transformer to the basic structure of UPFC, and 2 is back-to-back voltage source converter, and 3 is series transformer, and 4 is controlled alternating current circuit.UPFC comprises side converter in parallel, series side converter, side transformer in parallel, series side transformer, side transformer service entrance switch in parallel, series side transformer by-pass switch etc.; It can be realized and exchange grid-connected point voltage or Reactive Power Control, line scan pickup coil side voltage control, phase shifting control, impedance Control, the directly multi-objective coordinated control such as trend control; Due to its structure, to compare other flexible transmission device more complicated, needs detailed and reliable protection strategy to guarantee the safety of its equipment and electric power system, improves the efficiency of THE UPFC; For the UPFC that adopts different topology converter, its protection strategy is also different.
At present, domestic have to carry out the access of UPFC is affected to the research of aspect to harmonics, but also have pertinent literature to report relevant UPFC protection strategy and defencive function configuration.Appoint virtuous " THE UPFC and the impact on relaying protection thereof " (North China Electric Power University's Master's thesis, 2005,12), mainly studied the impact of UPFC harmonic wave on relaying protection, analyzed under symmetrical and unbalanced fault condition, the impact that UPFC adjusts the distance and protects, has proposed to reduce the corresponding adjustment Tactics and measures that UPFC takes relaying protection impact; " impact of THE UPFC and the protection of adjusting the distance thereof " (North China Electric Power University's Master's thesis of Zhang Yong; 2005; 1); analyzed under stable state and fault condition UPFC to the impedor impact of circuit distance protection; by off-line simulation program, carry out the adjust the distance simulation study of protection impact of UPFC, proposed corresponding adjustment strategy and method that distance protection should be taked.
(electrician is electric in the people's such as Wang Ruxi " containing the adaptive distance protection research of THE UPFC circuit "; 2011; 8; 18～22); impact by UPFC under analysis of failure state on measurement impedance; propose adaptive guard and two kinds of solutions of phase fault adaptive guard of ground short circuit, overcome the impact of traditional distance protection possibility tripping when the rear end circuit generation line fault containing UPFC device, made distance protection can correctly reflect each short trouble.
The impact of UPFC on circuit distance protection only considered in the analysis of above-mentioned document, there is no to consider impact such as line differential protection and direction component etc. on other, do not relate to coordinating of the protection of UPFC equipment of itself and the protection of original AC system and UPFC autoprotection; Above-mentioned document is adjusted the distance protection while affecting analyzing UPFC, the side in parallel of UPFC is considered to and is connected on circuit, can make like this UPFC become complicated to the impact of route protection, and during practical engineering application, consider convenience and the reasonability of its wiring, can be by side joint in parallel to the bus of alternating current circuit, as the Yi Ge branch of ac bus, it affects on harmonics that meeting is less and to control effect the same; On the other hand, above-mentioned document keeps the sampled point of former protection constant after UPFC access, so also can make the fixed value adjusting of protection become complicated, is not suitable for engineering application, need to be optimized protection sampled point.
In order to give full play to the feature of THE UPFC tide optimization; protect the safety of its equipment and electric power system; promote the fast development of THE UPFC application, need a kind of more reliable, less on harmonics impact, THE UPFC guard method and system of being more suitable for engineering application.
Summary of the invention
Object of the present invention; be to provide a kind of protection collocation method and system of THE UPFC; simple and practical; reliability is high; can protect the safety of THE UPFC main equipment and electric power system; the impact of the access that simultaneously can reduce THE UPFC on original AC system protection, is suitable for engineering application.
In order to achieve the above object, solution of the present invention is:
A guard method for THE UPFC, this guard method is protected side converter in parallel and series side converter subregion according to converter quantity; Described side converter unit protection district in parallel and series side converter unit protection district protect according to harmonics district, converter valve protection zone and direct current utmost point protection zone subregion; Layered protection is carried out by converter valve layer and valve cell layer in described converter valve protection zone;
The guard method of above-mentioned THE UPFC, for the THE UPFC that adopts modular multilevel structure converter, the protection of described converter valve district is carried out layered protection by submodule floor, brachium pontis valve floor and converter valve floor.
A protection system for THE UPFC, this protection system consists of N converter unit protection subsystem, and N equals the total number of converter of THE UPFC, and N is natural number, and N is greater than 1; Described converter unit protection subsystem comprises side converter unit protection subsystem in parallel and series side converter unit protection subsystem two classes;
The protection system of above-mentioned THE UPFC, its side converter unit protection subsystem in parallel and series side converter unit protection subsystem include exchanging area protected location, converter valve district protected location and direct current polar region protected location; Described converter valve district protected location comprises converter valve floor protection subelement and converter valve elementary layer protection subelement;
The protection system of above-mentioned THE UPFC increases a voltage transformer pt of configuration on the circuit of series transformer series connection access, makes the line side winding of series transformer between this PT and former line current instrument transformer CT;
The protection system of above-mentioned THE UPFC, the PT that the voltage transformer pt on the described circuit newly increasing is used as former AC system route protection module samples; By the module of described AC line protection, the transformer wire trackside winding part of protecting former circuit and sealing in circuit; Keep the protection range of former AC system bus protection module constant, intersect with the protection range of former AC system route protection module, guarantee unprotect dead band, region, alternating current circuit.
The protection system of above-mentioned THE UPFC, for the THE UPFC that adopts modular multilevel structure converter, described converter valve district protected location comprises submodule floor protection subelement, brachium pontis valve floor protection subelement and converter valve floor protection subelement;
The exchanging area protected location of above-mentioned side converter unit protection subsystem in parallel includes but not limited to: alternating voltage abnormal protection module, AC system frequency abnormal protection module and shunt transformer protection subelement;
The converter valve district protected location of above-mentioned side converter unit protection subsystem in parallel includes but not limited to: converter ac bus differential protection module, converter overcurrent protection module, converter reactor differential protection module and valve differential protection module;
The direct current polar region protected location of above-mentioned side converter unit protection subsystem in parallel includes but not limited to: overcurrent protection module that direct voltage abnormal protection module and direct current are under-voltage.
The exchanging area protected location of above-mentioned series side converter unit protection subsystem includes but not limited to: line voltage distribution abnormal protection module and series transformer protection subelement;
The converter valve district protected location of above-mentioned series side converter unit protection subsystem includes but not limited to: converter ac bus differential protection module, converter overcurrent protection module, converter reactor differential protection module, valve differential protection module;
The direct current polar region protected location of above-mentioned series side converter unit protection subsystem includes but not limited to: overcurrent protection module that direct voltage abnormal protection module and direct current are under-voltage.
Above-mentioned protection system is applicable to the structure that UPFC sidepiece in parallel is tapped into AC system bus.
Adopt after such scheme, the guard method of THE UPFC of the present invention and system can be protected the safety of THE UPFC main equipment and electric power system, better bring into play the advantage of THE UPFC optimization system trend; Its method is simple and reliable, has covered the All Ranges of THE UPFC equipment, and THE UPFC autoprotection and the protection of original AC system are cooperatively interacted, and protection range intersects, and guarantees unprotect dead band, is applicable to engineering application.THE UPFC is a kind of flexible AC transmission equipment of compound, multi-control target, its complex structure, the present invention considers from the reasonability angle of practical engineering application, the actual meeting of side system in parallel is also connected on the bus of circuit, rather than be directly attempted by circuit, reduced like this impact of UPFC access on route protection; And by being carried out Sub-region and hierarchical control, make its protection configuration more clear, simple; In addition, the present invention is by increasing on the line a voltage measurement point of configuration, reduced the impact that the access of THE UPFC causes original AC system protection.The present invention is equally applicable to the protection configuration of flow controller (IPFC) between Static Series Synchronous Compensator (SSSC), line and CSC (convertible static compensator).
Accompanying drawing explanation
Fig. 1 is the basic structure isoboles of THE UPFC;
Fig. 2 is the THE UPFC basic structure isoboles of optimizing after the side mode of connection in parallel;
Fig. 3 is the structure chart of THE UPFC protection zone configuration in the present invention;
Fig. 4 is the structure chart that in the present invention, THE UPFC matches with former AC system protection.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is elaborated.
As shown in Figure 1,1 is that shunt transformer, 2 is that voltage source converter, 3 is that series transformer, 4 is alternating current circuit equivalent reactance to the basic structure isoboles of THE UPFC.Press structure shown in Fig. 1, the wiring of side in parallel while being unfavorable for engineering application, and this connection is larger on the impact of AC line protection; For ease of engineering application, the side joint in parallel of THE UPFC can be entered to ac bus, reduce the impact on route protection, as shown in Figure 2, structural equivalents shown in this structure and Fig. 1, controls effect the same.
The present invention is based on structure shown in Fig. 2; a kind of guard method and system of THE UPFC are provided; as shown in Figure 3; by the first subregion of THE UPFC, layering and zoning is protected again; this collocation method has covered the All Ranges of UPFC equipment; cooperatively interact with original harmonics, protection range intersects simultaneously, guarantees unprotect dead band.
A guard method for THE UPFC, this guard method is protected side converter in parallel and series side converter subregion according to converter quantity; Described side converter unit protection in parallel district protects according to harmonics district 1, converter valve protection zone 2 and direct current utmost point protection zone 3 subregions; Described series side converter unit protection district protects according to harmonics district 4, converter valve protection zone 5 and direct current utmost point protection zone 6 subregions; The protection 2 of described side converter valve in parallel district and series side converter valve district protection 5 are all carried out layered protection by converter valve floor and valve cell floor;
The guard method of aforesaid THE UPFC; for the THE UPFC that adopts modular multilevel structure converter, the protection 2 of described side converter valve in parallel district and series side converter valve district protection 5 are all carried out layered protection by submodule floor, brachium pontis valve floor and converter valve floor.
A protection system for THE UPFC, this protection system consists of N converter unit protection subsystem, and N equals the total number of converter of THE UPFC, and N is natural number, and N is greater than 1; Described converter unit protection subsystem comprises side converter unit protection subsystem in parallel and series side converter unit protection subsystem two classes;
The protection system of aforesaid THE UPFC, its side converter unit protection subsystem in parallel and series side converter unit protection subsystem include exchanging area protected location, converter valve district protected location and direct current polar region protected location; Described converter valve district protected location comprises converter valve floor protection subelement and converter valve elementary layer protection subelement;
As shown in Figure 4, the protection system of aforesaid THE UPFC increases a voltage transformer 3 of configuration on the circuit of series transformer series connection access, makes the line side winding of series transformer between this voltage transformer 3 and former line current instrument transformer 1; 2 is the voltage transformer of installing on bus, by former route protection module samples is used;
The protection system of aforesaid THE UPFC, the voltage transformer that the voltage transformer 3 on the described circuit newly increasing is used as former AC system route protection module samples; By the module of described AC line protection, the transformer wire trackside winding part of protecting former circuit and sealing in circuit; Keep the protection range of former AC system bus protection module constant, intersect with the protection range of former AC system route protection module, guarantee unprotect dead band, region, alternating current circuit.
The protection system of aforesaid THE UPFC, for the THE UPFC that adopts modular multilevel structure converter, described converter valve district protected location comprises submodule floor protection subelement, brachium pontis valve floor protection subelement and converter valve floor protection subelement;
The exchanging area protected location of aforesaid side converter unit protection subsystem in parallel includes but not limited to: alternating voltage abnormal protection module, AC system frequency abnormal protection module and shunt transformer protection subelement;
The converter valve district protected location of aforesaid side converter unit protection subsystem in parallel includes but not limited to: converter ac bus differential protection module, converter overcurrent protection module, converter reactor differential protection module and valve differential protection module;
The direct current polar region protected location of aforesaid side converter unit protection subsystem in parallel includes but not limited to: overcurrent protection module that direct voltage abnormal protection module and direct current are under-voltage.
The exchanging area protected location of aforesaid series side converter unit protection subsystem includes but not limited to: line voltage distribution abnormal protection module and series transformer protection subelement;
The converter valve district protected location of aforesaid series side converter unit protection subsystem includes but not limited to: converter ac bus differential protection module, converter overcurrent protection module, converter reactor differential protection module, valve differential protection module;
The direct current polar region protected location of aforesaid series side converter unit protection subsystem includes but not limited to: overcurrent protection module that direct voltage abnormal protection module and direct current are under-voltage.
The present invention be take some basic defencive functions of being applicable to THE UPFC and is introduced embodiment as example; but guard method of the present invention and system are not limited to above-mentioned defencive function, for the defencive function that comprises other or do not adopt flow controller between the THE UPFC, Static Series Synchronous Compensator, line of above-mentioned part defencive function and guard method and the system of convertible static compensator are all suitable for.Any involve to adopt by converter carry out subregion, carry out again within the THE UPFC guard method of layering and zoning and system all belong to the scope of the invention.
Finally should be noted that: in conjunction with above-described embodiment, only illustrate that technical scheme of the present invention is not intended to limit.Those of ordinary skill in the field are to be understood that: those skilled in the art can modify or be equal to replacement the specific embodiment of the present invention, but within the claimed scope of patent that these modifications or change are all awaited the reply in application.
Claims (12)
1. a guard method for THE UPFC, is characterized in that, described guard method is protected side converter in parallel and series side converter subregion according to converter quantity; Described side converter unit protection district in parallel and series side converter unit protection district protect according to harmonics district, converter valve protection zone and direct current utmost point protection zone subregion; Layered protection is carried out by converter valve layer and valve cell layer in described converter valve protection zone.
2. the guard method of THE UPFC as claimed in claim 1; it is characterized in that; for the THE UPFC that adopts modular multilevel structure converter, the protection of described converter valve district is carried out layered protection by submodule floor, brachium pontis valve floor and converter valve floor.
3. a protection system for THE UPFC, is characterized in that, described protection system consists of N converter unit protection subsystem, and N equals the total number of converter of THE UPFC, and N is natural number, and N is greater than 1; Described converter unit protection subsystem comprises side converter unit protection subsystem in parallel and series side converter unit protection subsystem two classes.
4. the protection system of a kind of THE UPFC as claimed in claim 3, it is characterized in that, described side converter unit protection subsystem in parallel and series side converter unit protection subsystem include exchanging area protected location, converter valve district protected location and direct current polar region protected location; Described converter valve district protected location comprises converter valve floor protection subelement and converter valve elementary layer protection subelement.
5. the protection system of a kind of THE UPFC as claimed in claim 3; it is characterized in that; on the circuit of series transformer series connection access, increase a voltage transformer pt of configuration, make the line side winding of series transformer between this PT and former line current instrument transformer CT.
6. the protection system of a kind of THE UPFC as claimed in claim 5, is characterized in that, described protection system is used the voltage transformer pt on the described circuit newly increasing PT as former AC system route protection module samples; By the module of described AC line protection, the transformer wire trackside winding part of protecting former circuit and sealing in circuit; Keep the protection range of former AC system bus protection module constant, intersect with the protection range of former AC system route protection module, guarantee unprotect dead band, region, alternating current circuit.
7. the protection system of a kind of THE UPFC as claimed in claim 4; it is characterized in that; for the THE UPFC that adopts modular multilevel structure converter, described converter valve district protected location comprises submodule floor protection subelement, brachium pontis valve floor protection subelement and converter valve floor protection subelement.
8. the protection system of THE UPFC as claimed in claim 4; it is characterized in that, the exchanging area protected location of described side converter unit protection subsystem in parallel includes but not limited to: alternating voltage abnormal protection module, AC system frequency abnormal protection module and shunt transformer protection subelement.
9. the protection system of THE UPFC as claimed in claim 4; it is characterized in that, the converter valve district protected location of described side in parallel or series side converter unit protection subsystem includes but not limited to: converter ac bus differential protection module, converter overcurrent protection module, converter reactor differential protection module and valve differential protection module.
10. the protection system of THE UPFC as claimed in claim 4; it is characterized in that, the direct current polar region protected location of described side in parallel or series side converter unit protection subsystem includes but not limited to: overcurrent protection module that direct voltage abnormal protection module and direct current are under-voltage.
The protection system of 11. THE UPFC as claimed in claim 4, is characterized in that, the exchanging area protected location of described series side converter unit protection subsystem includes but not limited to: line voltage distribution abnormal protection module and series transformer protection subelement.
The protection system of 12. a kind of THE UPFC as claimed in claim 3, is characterized in that, described protection system is applicable to the structure that UPFC sidepiece in parallel is tapped into AC system bus.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105186840A (en) * | 2015-08-31 | 2015-12-23 | 国家电网公司 | Harmonic suppression method based on submodule capacitor voltage reduction for unified power flow controller (UPFC) |
| CN105207208A (en) * | 2015-09-21 | 2015-12-30 | 山东科汇电力自动化股份有限公司 | Circuit achieving power flow control and small current ground fault active compensation arc suppression simultaneously |
| CN105552916A (en) * | 2015-12-17 | 2016-05-04 | 江苏省电力公司电力经济技术研究院 | UPFC (unified power flow controller) system-level control method with circuit power out-of-limit control function |
| CN106207996A (en) * | 2016-08-24 | 2016-12-07 | 国网江苏省电力公司电力科学研究院 | THE UPFC series transformer charge initiation test relaying configuration method |
| CN106549383A (en) * | 2016-10-31 | 2017-03-29 | 全球能源互联网研究院 | A kind of control system and THE UPFC of THE UPFC |
| CN106786428A (en) * | 2017-02-28 | 2017-05-31 | 全球能源互联网研究院 | A kind of transmission line distance protecting method and device containing SSSC |
| CN106911132A (en) * | 2017-04-27 | 2017-06-30 | 武汉理工大学 | The electro-magnetic transient Mathematical Modeling of the Distributed Power Flow controller based on MMC, control system and modeling method |
| CN107086549A (en) * | 2017-05-22 | 2017-08-22 | 华北电力大学 | The segment protection method of distance I of UPFC line attachment single-phase grounding faults |
| CN107104420A (en) * | 2017-05-22 | 2017-08-29 | 华北电力大学 | The segment protection method of circuit distance I accessed suitable for THE UPFC |
| CN107994584A (en) * | 2017-11-28 | 2018-05-04 | 国网江苏省电力有限公司经济技术研究院 | A kind of major loop wiring construction of compensator |
| CN108321775A (en) * | 2018-01-30 | 2018-07-24 | 国网上海市电力公司 | The mating protection method of UPFC devices and electric system |
| CN108365597A (en) * | 2018-01-29 | 2018-08-03 | 中国电力科学研究院有限公司 | Series transformer turn-to-turn fault diagnostic method and system after a kind of thyristor bypass switch quick-make |
| CN109066586A (en) * | 2018-09-19 | 2018-12-21 | 南京南瑞继保电气有限公司 | A kind of series transformer pilot zero sequence differential protection method and device of magnetic balance |
| CN109066694A (en) * | 2018-09-29 | 2018-12-21 | 东南大学 | Multiple target tide optimization method containing the electric system of flow controller between line |
| CN109193581A (en) * | 2018-09-18 | 2019-01-11 | 国网天津市电力公司 | Consider the transmission line distance protecting method of static synchronous series compensator access |
| WO2020057608A1 (en) * | 2018-09-21 | 2020-03-26 | 全球能源互联网研究院有限公司 | Current transformer and static synchronous series compensator |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102170110A (en) * | 2011-03-16 | 2011-08-31 | 中国电力科学研究院 | Method for protecting modularized multi-level transverter valve |
| CN102437572A (en) * | 2011-12-21 | 2012-05-02 | 武汉理工大学 | Power flow control system |
| US20130147275A1 (en) * | 2010-08-31 | 2013-06-13 | Sma Solar Technology Ag | Inverter with an ac interface for the connection of ac modules |
-
2014
- 2014-08-05 CN CN201410382299.1A patent/CN104134968B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130147275A1 (en) * | 2010-08-31 | 2013-06-13 | Sma Solar Technology Ag | Inverter with an ac interface for the connection of ac modules |
| CN102170110A (en) * | 2011-03-16 | 2011-08-31 | 中国电力科学研究院 | Method for protecting modularized multi-level transverter valve |
| CN102437572A (en) * | 2011-12-21 | 2012-05-02 | 武汉理工大学 | Power flow control system |
Non-Patent Citations (2)
| Title |
|---|
| 孙海顺等: "基于多CPU的UPFC控制与保护***设计", 《电力自动化设备》 * |
| 文博等: "高压直流输电控制保护***功能及应用", 《湖北电力》 * |
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| CN105186840A (en) * | 2015-08-31 | 2015-12-23 | 国家电网公司 | Harmonic suppression method based on submodule capacitor voltage reduction for unified power flow controller (UPFC) |
| CN105186840B (en) * | 2015-08-31 | 2017-07-14 | 国家电网公司 | UPFC harmonic suppressing methods based on reduction submodule capacitor voltage |
| CN105207208A (en) * | 2015-09-21 | 2015-12-30 | 山东科汇电力自动化股份有限公司 | Circuit achieving power flow control and small current ground fault active compensation arc suppression simultaneously |
| CN105207208B (en) * | 2015-09-21 | 2018-07-06 | 山东科汇电力自动化股份有限公司 | Realize power flowcontrol and the circuit of small current grounding fault active compensation extinguishing arc simultaneously |
| CN105552916B (en) * | 2015-12-17 | 2018-04-10 | 江苏省电力公司电力经济技术研究院 | A kind of system-level control methods of UPFC with the out-of-limit control function of line power |
| CN105552916A (en) * | 2015-12-17 | 2016-05-04 | 江苏省电力公司电力经济技术研究院 | UPFC (unified power flow controller) system-level control method with circuit power out-of-limit control function |
| CN106207996A (en) * | 2016-08-24 | 2016-12-07 | 国网江苏省电力公司电力科学研究院 | THE UPFC series transformer charge initiation test relaying configuration method |
| CN106549383A (en) * | 2016-10-31 | 2017-03-29 | 全球能源互联网研究院 | A kind of control system and THE UPFC of THE UPFC |
| CN106549383B (en) * | 2016-10-31 | 2019-07-02 | 全球能源互联网研究院有限公司 | A kind of control system and THE UPFC of THE UPFC |
| CN106786428B (en) * | 2017-02-28 | 2019-03-22 | 全球能源互联网研究院 | A kind of transmission line distance protecting method and device containing SSSC |
| CN106786428A (en) * | 2017-02-28 | 2017-05-31 | 全球能源互联网研究院 | A kind of transmission line distance protecting method and device containing SSSC |
| CN106911132A (en) * | 2017-04-27 | 2017-06-30 | 武汉理工大学 | The electro-magnetic transient Mathematical Modeling of the Distributed Power Flow controller based on MMC, control system and modeling method |
| CN106911132B (en) * | 2017-04-27 | 2019-07-02 | 武汉理工大学 | The control system and modeling method of Distributed Power Flow controller based on MMC |
| CN107086549A (en) * | 2017-05-22 | 2017-08-22 | 华北电力大学 | The segment protection method of distance I of UPFC line attachment single-phase grounding faults |
| CN107104420A (en) * | 2017-05-22 | 2017-08-29 | 华北电力大学 | The segment protection method of circuit distance I accessed suitable for THE UPFC |
| CN107994584A (en) * | 2017-11-28 | 2018-05-04 | 国网江苏省电力有限公司经济技术研究院 | A kind of major loop wiring construction of compensator |
| CN108365597A (en) * | 2018-01-29 | 2018-08-03 | 中国电力科学研究院有限公司 | Series transformer turn-to-turn fault diagnostic method and system after a kind of thyristor bypass switch quick-make |
| CN108365597B (en) * | 2018-01-29 | 2021-11-26 | 中国电力科学研究院有限公司 | Interturn fault diagnosis method and system for series transformer after thyristor bypass switch is quickly closed |
| CN108321775A (en) * | 2018-01-30 | 2018-07-24 | 国网上海市电力公司 | The mating protection method of UPFC devices and electric system |
| CN109193581A (en) * | 2018-09-18 | 2019-01-11 | 国网天津市电力公司 | Consider the transmission line distance protecting method of static synchronous series compensator access |
| CN109066586A (en) * | 2018-09-19 | 2018-12-21 | 南京南瑞继保电气有限公司 | A kind of series transformer pilot zero sequence differential protection method and device of magnetic balance |
| WO2020057608A1 (en) * | 2018-09-21 | 2020-03-26 | 全球能源互联网研究院有限公司 | Current transformer and static synchronous series compensator |
| CN109066694A (en) * | 2018-09-29 | 2018-12-21 | 东南大学 | Multiple target tide optimization method containing the electric system of flow controller between line |
| CN109066694B (en) * | 2018-09-29 | 2019-12-10 | 东南大学 | multi-objective power flow optimization method for power system containing inter-line power flow controller |
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