CN102074959B - Thyristor valve-controlled controlled shunt reactor device - Google Patents
Thyristor valve-controlled controlled shunt reactor device Download PDFInfo
- Publication number
- CN102074959B CN102074959B CN201010614288.3A CN201010614288A CN102074959B CN 102074959 B CN102074959 B CN 102074959B CN 201010614288 A CN201010614288 A CN 201010614288A CN 102074959 B CN102074959 B CN 102074959B
- Authority
- CN
- China
- Prior art keywords
- thyristor valve
- reactor
- controlled
- parallel reactors
- controllable parallel
- 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.)
- Active
Links
Classifications
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
Abstract
The invention relates to the field of reactive compensation of electrical power systems and provides a thyristor valve-controlled controlled shunt reactor device. The body of the thyristor valve-controlled controlled shunt reactor device has a transformer structure, and can be designed into a high short circuit impedance form or a form that a common transformer is externally connected with a reactor according to the requirements. Reactive output and adjustment of capacity are realized by controlling the connection condition of the thyristor valve. As the partial pressure of an auxiliary reactor and an energy taking reactor provides the energy-taking and turning-on voltage for the thyristor valve, so a current zero-crossing switching mode or a phase control mode is adopted by the control mode of the thyristor valve so as to meet different requirements of a system on reactive compensation; when the current zero-crossing switching mode of the thyristor valve is adopted, a process of capacity classification adjustment is finished by the current zero-crossing switching mode of the thyristor valve; and when the phase control mode of the thyristor valve is adopted, quick and smooth adjustment of reactive power output is realized by controlling the conduction angle of the thyristor valve.
Description
Technical field
The invention belongs to power system reactive power compensation field, particularly relate to a kind of thyristor valve-controlled controlled shunt reactor device.
Background technology
According to National Renewable Energy development plan, the Northwest will along west of a river Corridor Building ten million multikilowatt wind power base, it is away from load center, and in the grid-connected situation of large-scale wind power, the high-efficiency and economic of wind-powered electricity generation sends the two large technical barriers having become restriction the Northwest Wind Power Development with the safe and stable operation of electrical network.Wind power generation has the feature of intermittence, fluctuation and randomness.Output of wind electric field changes greatly, wind power fluctuation makes reactive power fluctuation on the 750kV passway for transmitting electricity of northwest frequent, reactive power/voltage control difficulty also result in Voltage-stabilizing Problems, adds the difficulty of Northwest Grid management and running, over-voltage and reactive power compensation particularly thorny.
Huge capacitive charge power, violent power flow changing and the limited insulation margin of UHV transmission line proposes higher requirement to the Reactive-power control of system, Overvoltage suppressing, there is the problem that contradiction between over-voltage and Reactive-power control is difficult to coordinate.
Controllable parallel reactors is as the effective means improving system regulation flexibility, effectively can solve 750kV wind-powered electricity generation and send passage and UHV transmission line reactive power compensation and voltage-controlled problem, improve voltage stability level and transient state operational limit, reduce circuit transport loss, balance reactive power distribution, and effectively can alleviate the pressure of management and running, be the important tool realizing 750kV and the operation of UHV transmission passage high-efficiency and economic.
Controllable parallel reactors mainly comprises controllable magnetic control shunt reactor (Magnetically Controlled Shunt Reactor, MCSR), stagewise controllable parallel reactors (Stepped Controlled Shunt Reactor, and thyristor control transformer (Thyristor Controlled Transformer, TCT) type controllable parallel reactors three kinds of versions SCSR).Wherein, stagewise controllable parallel reactors has the plurality of advantages such as control mode is simple, governing response speed is fast, security of operation is stable.
At present, in China 750kV transmission system and system for ultra-high voltage transmission, controlled parallel reactor device is not also had to come into operation.Also the thyristor valve-controlled controlled shunt reactor device not having the present invention to propose both at home and abroad drops into superhigh pressure and extra-high voltage grid application.
Summary of the invention
The object of the invention is: a kind of thyristor valve-controlled controlled shunt reactor device is provided, solve China 750kV wind-powered electricity generation and send passage and the contradiction between UHV transmission line reactive power compensation and over-voltage, improve voltage stability level and transient state operational limit, reduce circuit transport loss, balance reactive power distribution, alleviate the pressure of management and running, and coordinate neutral reactor to limit secondary arc current.
The invention provides a kind of thyristor valve-controlled controlled shunt reactor device, its body adopts transformer device structure, high short-circuit impedance form can be adopted according to demand, namely by strengthening the leakage reactance of transformer, transformer and reactor are closed in one, or adopt the form of common transformer external reactor again.Three-phase high-voltage side winding is connected into " Y " type, directly receives on high-voltage fence, through reactor ground connection after neutral point short circuit.Three-phase low-voltage side winding head end is drawn through sleeve pipe respectively, the direct ground connection of low-pressure side winding ends, configures thyristor valve, auxiliary reactor, getting can reactor according to the situation of low-pressure side winding.
The output that this controllable parallel reactors is idle and the adjustment of capacity are realized by the conducting situation controlling thyristor valve.The control mode of thyristor valve can adopt current over-zero switching or phase control two kinds of modes, meets the different requirements that System Reactive Power compensates.
When adopting thyristor valve current over-zero switching mode, due to auxiliary reactor and the dividing potential drop effect of getting energy reactor, energy and turning-on voltage can be got for thyristor valve provides, thus make capacity classification adjustment process rely on the mode of thyristor valve current over-zero switching to complete, to system without impact completely; When system generation transient fault, control corresponding thyristor valve conducting or close bypass breaker to make output reach rapidly maximum output capacity, effectively suppress power-frequency overvoltage and switching overvoltage.
When adopting the mode of thyristor valve phase control, equally due to auxiliary reactor and the dividing potential drop effect of getting energy reactor, by controlling the angle of flow of thyristor valve, realize the smooth adjustment of output reactive power; When system generation transient fault, control the angle of flow of thyristor valve or close bypass breaker and make output reach rapidly maximum output capacity, effectively suppressing power-frequency overvoltage and switching overvoltage.
The novelty of technology:
Northwest 750kV wind-powered electricity generation Transmission Corridor and 1000kV system for ultra-high voltage transmission have that electric pressure is high, charge idle large, over-voltage and the problem such as reactive power compensation is particularly thorny, reactive power/voltage control difficulty is large, also do not have controlled parallel reactor device to come into operation at present.Thyristor valve-controlled controlled shunt reactor device provided by the invention is applicable to reactive voltage and fluctuates 750kV wind-powered electricity generation Transmission Corridor and 1000kV transmission system frequently.In addition, in extra-high voltage transmission (500kV and 330kV transmission system), do not have thyristor valve-controlled controlled shunt reactor device provided by the invention to drop into application at present yet.
The creativeness of technology:
(1) thyristor valve controlled type controllable parallel reactors provided by the invention has been connected and has been got energy reactor on thyristor valve.In normal operation, can the dividing potential drop effect of reactor owing to getting, can thyristor valve provide get can and turning-on voltage.The controlled parallel reactor device put into operation both at home and abroad at present there is no and adopts this kind of version.
(2) control mode of thyristor valve can adopt current over-zero switching or phase control according to demand.When adopting thyristor valve current over-zero switching mode, capacity classification adjustment process relies on thyristor valve current over-zero switching to complete completely, and fast response time, to system without impact; When adopting thyristor valve phase control mode, by controlling the angle of flow of thyristor valve, realize quick, the smooth adjustment of output reactive power.Whole capacity regulating process does not need circuit breaker to participate in, and is suitable for the frequent occasion regulated.
(3) unique 1 the stagewise controllable parallel reactors put into operation with current home and abroad---compared with the 500kV stagewise controlled parallel reactor device of Xinzhou: the thyristor valve of the thyristor valve-controlled controlled shunt reactor device proposed requires can select to adopt operating passing zero or phase control two kinds of modes according to the difference that System Reactive Power compensates; Capacity regulating process relies on control the realization of thyristor valve conducting situation completely, response speed can reach 10ms, avoid the moment capacity occurred in the capacity classification adjustment process of Xinzhou device and fall phenomenon, solve and adopt circuit breaker can not realize the problem that capacity frequently regulates.
The practicality of technology:
(1) thyristor valve-controlled controlled shunt reactor device proposed, to match with body short impedance realize idle output and adjustment by controlling thyristor valve.According to the different demands of reactive power compensation, the control mode of thyristor valve can adopt current over-zero switching or phase control:
1., when adopting thyristor valve current over-zero switching mode, capacity classification adjustment process relies on thyristor valve current over-zero switching to complete completely, and fast response time, to system without impact;
2., when adopting thyristor valve phase control mode, by controlling the angle of flow of thyristor valve, quick, the smooth adjustment of output reactive power is realized.
(2) northwest 750kV passway for transmitting electricity and system for ultra-high voltage transmission reactive power fluctuation are frequently, and reactive power/voltage control difficulty requires very high to the adjustment frequency of controllable parallel reactors.The thyristor valve-controlled controlled shunt reactor device proposed, is suitable for frequent adjustment, is specially adapted to northwest 750kV passway for transmitting electricity and system for ultra-high voltage transmission, has good Practical prospect.
The advantage of technical solution of the present invention is:
1. thyristor valve controlled type controllable parallel reactors is particularly suitable for the frequent ultra-high/extra-high voltage transmission system regulated, and effectively can solve the contradiction between over-voltage and reactive power compensation, and coordinates neutral reactor to limit secondary arc current;
2. capacity regulating process can select the mode adopting thyristor valve current over-zero switching or phase control.When selecting the mode of thyristor valve operating passing zero, regulative mode is simple, and response is rapid, to system without impact.When selecting thyristor valve phase control mode, by controlling the angle of flow of thyristor valve, realize quick, the smooth adjustment of output reactive power;
3. whole steady-state adjustment process does not have circuit breaker to participate in, and rely on thyristor valve to complete completely, frequent adjustment does not affect the useful life of circuit breaker.Transient state controls to be realized by thyristor valve or circuit breaker, and response rapidly, can effectively limit power-frequency overvoltage and switching overvoltage, suppresses secondary arc current.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is a kind of exemplar schematic winding diagram of thyristor valve-controlled controlled shunt reactor device;
Fig. 2 is the single-phase main wiring diagram of the thyristor valve-controlled controlled shunt reactor device low-pressure side equipment shown in Fig. 1.
Embodiment
Thyristor valve controlled type controllable parallel reactors can be used as circuit controllable parallel reactors and bus controllable parallel reactors two kinds of working methods.During as circuit controllable parallel reactors, the capacitive charge power of Absorbable rod transmission line, restriction power-frequency overvoltage and switching overvoltage, suppress secondary arc current, improves circuit conveying capacity and the stability of a system; During as bus controllable parallel reactors, idle by regulation output, guarantee the stable of busbar voltage.
Figure 1 show a kind of exemplar schematic winding diagram of thyristor valve-controlled controlled shunt reactor device, thyristor valve controlled type controllable parallel reactors body adopts transformer device structure, three-phase high-voltage side winding is connected into " Y " type, directly receives on high-voltage fence, through reactor ground connection after neutral point short circuit.Three-phase low-voltage side winding head end is drawn through sleeve pipe respectively, the direct ground connection of low-pressure side winding ends, low pressure winding head end be connected thyristor valve, auxiliary reactor, circuit breaker series reactor between end.
According to the demand that System Reactive Power compensates, the adjustment for installed capacity can adopt the mode of thyristor valve operating passing zero or phase control to realize.Current over-zero switching and phase control two kinds of different modes are adopted to set forth the corresponding course of work respectively for thyristor valve below.
(1) thyristor valve adopts current over-zero switching mode
The classification of installed capacity regulates the mode adopting thyristor valve current over-zero switching, can divide multistage, determines thyristor valve quantity according to point progression.Accompanying drawing 1 and accompanying drawing 2 all for decile 4 level capacity (25%, 50%, 75%, 100%4 capacity level), three-phase key wiring diagram when showing decile 4 level capacity and single-phase main wiring diagram.For setting forth conveniently, for 4 level capacities shown in accompanying drawing 2, operation principle is described.Device divides 25%, 50%, 75%, 100% 4 capacity level.In figure, b end is controlled reactor low-pressure side head end, and y holds controlled reactor low-pressure side end.Xb1, Xb2, Xb3 are auxiliary reactor; Tk1, Tk2, Tk3 are respectively 100% capacity level thyristor controlled series compensation, 75% capacity level thyristor controlled series compensation, 50% capacity level thyristor controlled series compensation; GW1, GW2, GW3 are respectively 100% capacity level isolating switch, 75% capacity level isolating switch, 50% capacity level isolating switch.Xb11, Xb12, for getting energy reactor, are in series with thyristor valve Tk1 and Tk2 respectively.The 100% capacity level bypass breaker D in parallel at thyristor valve Tk1 two ends.
In course of normal operation, when thyristor valve Tk1 conducting, control thyristor valve Tk2, Tk3 locking, plant running is in 100% capacity level; When thyristor valve Tk2 conducting, control thyristor valve Tk1, Tk3 locking, plant running is in 75% capacity level; When thyristor valve Tk3 conducting, control thyristor valve Tk1, Tk2 locking, plant running is in 50% capacity level; When the whole locking of thyristor valve Tk1, Tk2, Tk3, plant running is in 25% capacity level.Installed capacity and thyristor valve control corresponding relation as shown in table 1:
Table 1 switching volume controlled table
Wherein, ×---represent and disconnect, zero---represents conducting.
The classification adjustment process of installed capacity is realized by the mode controlling respective thyristor valve current over-zero switching, and lower mask body sets forth the handoff procedure of capacity:
1. when capacity switches from small to large, the dividing potential drop due to auxiliary reactor act as larger capacity thyristor valve provide get can and turning-on voltage, therefore thyristor valve can adopt the mode of current over-zero switching complete capacity classification regulate;
2., when capacity switches from big to small, what larger capacity level thyristor valve was connected get can the dividing potential drop effect of reactor, can for comparatively low capacity level thyristor valve provide get can and turning-on voltage.Switch to example by 100% capacity level to 75% capacity level with device in Fig. 2, the dividing potential drop of Xb11 act as thyristor valve Tk2 provide get can and turning-on voltage.Thus make handoff procedure rely on the mode of thyristor valve current over-zero switching to complete completely;
3. when system jam, thyristor valve Tk1 is open-minded, makes controllable parallel reactors reach rapidly 100% output capacity.When there is close-in fault in controllable parallel reactors body high-pressure side, valve-based electronics unit (VBE) cannot effectively be got can, corresponding valve group can not trigger open-minded, now by closing the mode of bypass breaker D, output capacity is adjusted to 100%, effectively suppresses power-frequency overvoltage and switching overvoltage;
4. because device is pure inductive element substantially, the current zero-crossing point flowing through thyristor valve overlaps substantially with thyristor valve both end voltage peak point, and the peak point therefore by detecting thyristor valve both end voltage determines the zero crossing of electric current.
(2) thyristor valve adopts phase control mode
When thyristor valve adopts the mode of phase control, due to auxiliary reactor and larger capacity level thyristor valve connect that get can the dividing potential drop effect of reactor, therefore by controlling the angle of flow of thyristor valve Tk1, Tk2, Tk3, realizing controllable parallel reactors and exporting idle continuous, smooth adjustment; When system jam, control the Trigger Angle of corresponding thyristor valve, make controllable parallel reactors reach rapidly 100% output capacity.When there is close-in fault in controllable parallel reactors body high-pressure side, valve-based electronics unit (VBE) cannot effectively be got can, corresponding valve group can not trigger open-minded, now by closing the mode of bypass breaker D, output capacity is adjusted to 100%, effectively suppresses power-frequency overvoltage and switching overvoltage.
Thyristor valve controlled type controllable parallel reactors, its whole steady-state adjustment process does not have circuit breaker to participate in, and rely on thyristor valve to complete completely, frequent adjustment does not affect the useful life of circuit breaker.Transient state controls to be realized by thyristor valve or circuit breaker, and response rapidly, can effectively limit power-frequency overvoltage and switching overvoltage, suppresses secondary arc current.
According to specific exemplary embodiment, invention has been described herein.It will be apparent under not departing from the scope of the present invention, carrying out suitable replacement to one skilled in the art or revise.Exemplary embodiment is only illustrative, instead of the restriction to scope of the present invention, and scope of the present invention is defined by appended claim.
Claims (1)
1. a thyristor valve controlled type controllable parallel reactors, it is characterized in that reactor body adopts transformer device structure, the concrete way of realization of described controllable parallel reactors body adopts high short-circuit impedance form to form, namely by strengthening the leakage reactance of transformer, transformer and reactor are closed in one, or adopt common transformer more external reactor form form;
The main circuit of controllable parallel reactors comprise controllable parallel reactors body, the installing of controllable parallel reactors low-pressure side thyristor valve, auxiliary reactor and get can reactor, described controllable parallel reactors high-pressure side winding three-phase is connected into " Y " type, directly receive on high-voltage fence, through reactor ground connection after neutral point short circuit; Three-phase low-voltage side winding head end connects thyristor valve, auxiliary reactor respectively and gets energy reactor, the direct ground connection of low-pressure side winding ends after sleeve pipe is drawn;
The reactive capability of controllable parallel reactors regulates the mode adopting thyristor valve current over-zero switching or phase control;
When described controllable parallel reactors adopts thyristor valve current over-zero switching mode, due to auxiliary reactor and the dividing potential drop effect of getting energy reactor, energy and turning-on voltage is got for respective thyristor valve provides, thus make capacity classification adjustment process rely on the mode of thyristor valve current over-zero switching to complete, to system without impact completely; When system generation transient fault, control corresponding thyristor valve or close bypass breaker to make output reach rapidly maximum output capacity, effectively suppress power-frequency overvoltage and switching overvoltage;
When controllable parallel reactors adopts the mode of thyristor valve phase control, due to auxiliary reactor and the dividing potential drop effect of getting energy reactor, getting energy and turning-on voltage for respective thyristor valve provides, by controlling the angle of flow of thyristor valve, realizing level and smooth, the quick adjustment of output reactive power; When system generation transient fault, control the angle of flow of thyristor valve or close bypass breaker and make output reach rapidly maximum output capacity, thus effectively suppressing power-frequency overvoltage and switching overvoltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010614288.3A CN102074959B (en) | 2010-12-30 | 2010-12-30 | Thyristor valve-controlled controlled shunt reactor device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010614288.3A CN102074959B (en) | 2010-12-30 | 2010-12-30 | Thyristor valve-controlled controlled shunt reactor device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102074959A CN102074959A (en) | 2011-05-25 |
| CN102074959B true CN102074959B (en) | 2015-03-25 |
Family
ID=44033358
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010614288.3A Active CN102074959B (en) | 2010-12-30 | 2010-12-30 | Thyristor valve-controlled controlled shunt reactor device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102074959B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2670269C1 (en) * | 2017-12-27 | 2018-10-22 | Акционерное общество "Энергетический институт им. Г.М. Кржижановского" | Reactor group switched by thyristors |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6114841A (en) * | 1996-06-17 | 2000-09-05 | Asea Brown Boveri Ab | Method and device for compensation of reactive power |
| CN2822028Y (en) * | 2005-09-09 | 2006-09-27 | 西安西电变压器有限责任公司 | AC step controllable parallel reactor device |
| RU2392717C1 (en) * | 2009-03-18 | 2010-06-20 | Александр Михайлович Брянцев | High-voltage overhead line with connected shunting reactors |
-
2010
- 2010-12-30 CN CN201010614288.3A patent/CN102074959B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6114841A (en) * | 1996-06-17 | 2000-09-05 | Asea Brown Boveri Ab | Method and device for compensation of reactive power |
| CN2822028Y (en) * | 2005-09-09 | 2006-09-27 | 西安西电变压器有限责任公司 | AC step controllable parallel reactor device |
| RU2392717C1 (en) * | 2009-03-18 | 2010-06-20 | Александр Михайлович Брянцев | High-voltage overhead line with connected shunting reactors |
Non-Patent Citations (1)
| Title |
|---|
| 分级可控并联电抗器的控制策略及保护配置;廖敏等;《电力系统自动化》;20100810;第34卷(第15期);第56-58页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102074959A (en) | 2011-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107069679B (en) | A kind of symmetrical bipolar MMC DC side monopolar grounding fault passes through and restoration methods | |
| CN102709942B (en) | Wind power station LVRT (low voltage ride through) device and control method thereof | |
| CN102832612B (en) | Hybrid power quality conditioner for direct current power system | |
| Sood | HVDC transmission | |
| Dai et al. | Characteristic analysis of reactive power compensation device at HVDC converter station | |
| CN110932538A (en) | Shutdown control method suitable for LCC-MMC hybrid cascade direct-current power transmission system | |
| CN103094912A (en) | 750 kV magnetic-control type controllable paralleling reactor excitation system and achieving method thereof | |
| Guo et al. | An overview of series-connected power electronic converter with function extension strategies in the context of high-penetration of power electronics and renewables | |
| Jiang et al. | A review of series voltage source converter with fault current limiting function | |
| CN102074961B (en) | Leveled controllable parallel reactor device configured by series public reactor | |
| CN102074962B (en) | Combination switch type step controllable shunt reactor | |
| CN110165676A (en) | The compound direct current flow controller for having failure current limit and cut-out function | |
| CN102074960A (en) | Thyristor valve control type controllable shunt reactor device adopting valve series type configuration | |
| CN102074958B (en) | Thyristor valve controlled type controllable paralleling reactor device configured with parallel valve branches | |
| CN102074959B (en) | Thyristor valve-controlled controlled shunt reactor device | |
| CN105703376A (en) | Mixed type unified power flow controller | |
| CN102237687B (en) | Multicolumn independent control compound switch type stepped controlled shunt reactor device | |
| CN102263413B (en) | Multicolumn body independently controls thyristor valve-controlled controlled shunt reactor device | |
| Yousuf et al. | HVDC and facts in power system | |
| CN104022514B (en) | Classification is adjustable high voltage reactor and Static Var Compensator optimistic coordinated control method | |
| CN107332260A (en) | A kind of three-phase commutation system for being used to improve stability of power system | |
| CN103094906A (en) | 750 kV magnetic-control type controllable highly resistance circuit based on compensation winding energy-getting excitation | |
| CN101494382B (en) | Large-capacity stillness wattless occurrence apparatus | |
| Thallam et al. | Reactive Power Compensation | |
| CN2884648Y (en) | Main loop of high voltage static/dynamic reactive power compensator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |