CN204118755U - 6 pulsation TCT formula controllable parallel reactors - Google Patents
6 pulsation TCT formula controllable parallel reactors Download PDFInfo
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- CN204118755U CN204118755U CN201420684965.2U CN201420684965U CN204118755U CN 204118755 U CN204118755 U CN 204118755U CN 201420684965 U CN201420684965 U CN 201420684965U CN 204118755 U CN204118755 U CN 204118755U
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- 230000010349 pulsation Effects 0.000 title claims abstract description 21
- 238000004804 winding Methods 0.000 claims abstract description 98
- 230000001447 compensatory effect Effects 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims description 9
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 4
- 230000001052 transient effect Effects 0.000 claims description 4
- 230000002441 reversible effect Effects 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 21
- 230000000694 effects Effects 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 description 9
- 239000012141 concentrate Substances 0.000 description 5
- 230000004044 response Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 230000001932 seasonal effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model provides a kind of 6 pulsation TCT formula controllable parallel reactors, and the first side winding of described reactor is the three-phase windings of star connection, Y connection, is connected in parallel in electric power system; The controlled winding of secondary side winding is the three-phase windings of star connection, Y connection, and the outgoing line side of every phase winding connects thyristor controlled series compensation, by the phase control mode of three-phase thyristor valve group, and regulation output capacity; The compensative winding of secondary side winding is the three-phase windings of delta connection, connects filter unit, reduces the harmonic current content of inflow system.Compared with prior art, the one 6 that the utility model provides is pulsed TCT formula controllable parallel reactors, can be arranged on ultra-high/extra-high voltage and exchange switchyard in the middle of long transmission line, play the effect of reactive power/voltage control as dynamic reactive compensation device.
Description
Technical field
The utility model relates to a kind of controllable parallel reactors, is specifically related to a kind of 6 pulsation TCT formula controllable parallel reactors.
Background technology
Controllable parallel reactors to solve in ultra-high/extra-high voltage transmission system reactive power/voltage control and over-voltage to one of key technology means of contradiction between the different demand of shunt reactor.Different according to technology path, controllable parallel reactors can be divided into transformer type controllable parallel reactors and the large class of magnet controlled controllable parallel reactors two.Transformer type controllable parallel reactors is different according to low-pressure side thyristor valve regulative mode, comprise classification adjustable type controllable parallel reactors and thyristor control transformer (Thyristor Controlled Transformer is called for short TCT) formula controllable parallel reactors.
The engineer applied of all existing supergrid of current classification adjustable type and magnet controlled controllable parallel reactors, classification adjustable type controllable parallel reactors principle is simple, fast response time, but be applied to ultra-high/extra-high voltage transmission system, consider the factors such as cost, its hierarchy capacity should not be arranged too much, is therefore more suitable for being applied to power flow changing violent but have the ultra-high/extra-high voltage transmission system of seasonality or daily load characteristic; Magnet controlled controllable parallel reactors can realize output capacity continuously, smooth adjustment, but response speed is relatively slow; TCT formula controllable parallel reactors has the advantage of classification adjustable type fast response time and magnet controlled capacity smooth adjustment concurrently, both can be used as the contradiction between the solution reactive power compensation of lines in parallel reactor and Overvoltage suppressing, can be used as again bus shunt reactor control system reactive voltage, concentrate in the ultra-high/extra-high voltage AC transmission system of access on a large scale at wind-powered electricity generation and apply unique advantage, concentrate at the violent but water power with seasonal feature of power flow changing and send AC transmission system outside and also have application prospect.Therefore need to provide a kind of being applicable to be arranged on the switchyard in the middle of ultra-high/extra-high voltage interchange long transmission line, replace SVC to play the TCT formula controllable parallel reactors of reactive power/voltage control effect as dynamic reactive compensation device.
Summary of the invention
In order to meet the needs of prior art, the utility model provides a kind of 6 pulsation TCT formula controllable parallel reactors, and described reactor comprises first side winding and secondary side winding, and described first side winding is the three-phase windings of star connection, Y connection, is connected in parallel in electric power system; Described secondary side winding comprises controlled winding and compensative winding; Described controlled winding is the three-phase windings of star connection, Y connection, and the outgoing line side of every phase winding connects thyristor controlled series compensation; Described compensative winding is the three-phase windings of delta connection, and the outgoing line side of every phase winding connects filter unit;
By regulating the trigger delay angle size of thyristor in thyristor controlled series compensation, change the output capacity of described reactor;
Described filter unit, for the harmonic current produced in the thyristor controlled series compensation work that filtering controlled winding connects.
Preferably, described thyristor controlled series compensation comprises two thyristors of reverse parallel connection; The trigger delay angle controlled range of described thyristor is 90 °≤α≤180 °;
Preferably, the two ends of a described thyristor controlled series compensation bypass breaker in parallel; Trigger described bypass breaker to close when described thyristor controlled series compensation breaks down, by the current transfer in thyristor controlled series compensation on bypass breaker, prevent from damaging thyristor controlled series compensation;
In the transient process of electric power system generation single phase ground fault, trigger bypass breaker close, prevent from faulted phase voltage from falling causing thyristor controlled series compensation cannot triggered as normal;
When described reactor is connected in parallel in the electric power system of stable operation, closed described bypass breaker, thyristor controlled series compensation does not pass through operating current thus reduces the running wastage of reactor;
Preferably, described filter unit comprises Shunt Capacitor Unit, passive filter and active filter;
Described Shunt Capacitor Unit and passive filter, the harmonic current that controlled winding described in filtering exports, provides reactive power compensation to described reactor, to reduce the harmonic component that described reactor exports, expands the output capacity scope of described reactor;
Described active filter, the harmonic current that controlled winding described in filtering exports, to reduce the harmonic component that described reactor exports;
Preferably, described first side winding is connected ground connection after lightning arrester with the head end of phase winding every in secondary side winding, for protective winding and thyristor controlled series compensation under over-voltage condition;
Preferably, ground connection after the three-phase neutral-point solid ground of described first side winding or linked reactor; The three-phase neutral-point solid ground of described controlled winding.
Compared with immediate prior art, excellent effect of the present utility model is:
1, in technical solutions of the utility model, compensative winding connects Shunt Capacitor Unit or filter, can reduce the harmonic component that reactor exports, and expands reactive power compensation scope;
2, in technical solutions of the utility model, the two ends of thyristor controlled series compensation are parallel with bypass breaker, can need maintenance at system jam, thyristor or close bypass breaker when there is overvoltage; Transmitting system or DC transmission system are concentrated for regular wind-powered electricity generation, can when carrying steady load, closed bypass breaker, circuit breaker bears long-term electric current, effectively reduces the loss of thyristor valve and cooling system;
4, the one 6 that the utility model provides is pulsed TCT formula controllable parallel reactors, have the advantage of classification adjustable type controllable parallel reactors fast response time and magnet controlled controllable parallel reactors capacity smooth adjustment concurrently, concentrate in the ultra-high/extra-high voltage AC transmission system of access on a large scale at wind-powered electricity generation and apply unique advantage, concentrate at the violent but water power with seasonal feature of power flow changing and send AC transmission system outside and also have application prospect; The regulating characteristics of the TCT formula controllable parallel reactors that the utility model provides is similar to SVC, is particularly suitable for being arranged on ultra-high/extra-high voltage and exchanges the middle switchyard of long transmission line, replace SVC to play the effect of reactive power/voltage control as dynamic reactive compensation device.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is further illustrated.
Fig. 1: 6 pulsation TCT formula controllable parallel reactors structure charts;
Fig. 2: 6 pulsation TCT formula controllable parallel reactors structure charts in the utility model embodiment.
Embodiment
Be described below in detail embodiment of the present utility model, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
TCT formula controllable parallel reactors is parallel to electric power system, the on-line control of reactor is realized by the trigger angle controlling thyristor, can realize output capacity continuously, smooth adjustment, and have employed power electronic device, fast response time, both can be used as bus shunt reactor, also can be used as lines in parallel reactor, realize the application of ultra-high/extra-high voltage transmission system reactive power/voltage control, solve the contradiction between reactive power compensation and Overvoltage suppressing.
Can produce 5 in the course of work due to 6 pulsation TCT formula controllable parallel reactors as shown in Figure 1,7 ..., 6k ± 1 subharmonic, if do not take measures to be limited it, harm can be brought to electric power system, even cannot put into operation,
As in Fig. 1, the three-phase windings of primary side adopts delta connection, and secondary side winding is three-phase and four-line star structure.The controlled range of IGBT group delay angle is 90 °≤α≤180 °.Secondary side three-phase windings neutral point links together, often independent mutually, mutual deviation 180 ° between three-phase current.
Current waveform half-wave symmetry in secondary side winding, not containing even-order harmonic and DC component in electric current, the subharmonic currents such as 3,5,7 are all passed to primary side.First side winding triangle connects, 3 times and 3 integral frequency harmonizing wave form circulation in winding inside, therefore, flow into 5,7 subharmonic currents of system larger, total harmonic distortion factor reaches more than 6%.For the TCT formula controllable parallel reactors that three-phase and four-line star structure connects, administer the method for harmonic wave mainly at primary side parallel filter.But filter and system equivalent impedance are in parallel, and its parameter is subject to the impact of extraneous factor and changes, and may cause filter off-resonance state, filter effect is deteriorated and easily occurs the harmful effect such as resonance overvoltage, mains by harmonics amplification.
Therefore, the applicable prerequisite of TCT formula controllable parallel reactors is that the harmonic wave of its injected system must be less than national harmonic standard.The one 6 that the utility model provides is pulsed TCT formula controllable parallel reactors, effectively limits the harmonic content of injected system during the work of TCT formula controllable parallel reactors, reduces the harmonic pollution to system, Loss reducing and noise.
One, as shown in Figure 2, in the present embodiment, 6 pulsation TCT formula controllable parallel reactors comprise first side winding and secondary side winding; First side winding is connected in parallel in electric power system, the output capacity of secondary side winding adjustment reactor and filtering harmonic wave.
1, first side winding:
First side winding is the three-phase windings of star connection, Y connection, comprises A phase winding, B phase winding and C phase winding; Three-phase neutral-point solid ground or ground connection after connecting the less reactor of reactance value.
Meanwhile, ground connection after the head end connection lightning arrester of every phase winding, for the protective winding when there is overvoltage fault.
2, secondary side winding:
Comprise controlled winding and compensative winding; Controlled winding is the three-phase windings of star connection, Y connection, and the outgoing line side of every phase winding connects thyristor controlled series compensation; Compensative winding is the three-phase windings of delta connection.
(1) controlled winding
Controlled winding connects thyristor controlled series compensation; The three-phase neutral-point solid ground of controlled winding, by regulating the size of IGBT group delay angle in thyristor controlled series compensation, changes the output capacity of reactor.
Meanwhile, ground connection after the head end connection lightning arrester of every phase winding, for the protection thyristor controlled series compensation when there is overvoltage fault.
1.: thyristor controlled series compensation
Thyristor controlled series compensation comprises two thyristors of reverse parallel connection; The trigger delay angle controlled range of thyristor is 90 °≤α≤180 °;
In the present embodiment, the control mode of thyristor controlled series compensation comprises three phase controls and individual-phase control;
Three phase controls: the size referring to the trigger delay angle simultaneously adjusting thyristor controlled series compensation in three-phase windings, to change the output capacity of reactor;
Individual-phase control: the trigger delay angle referring to arbitrary middle thyristor controlled series compensation mutually of adjustment three-phase windings separately, to change the output capacity of reactor.
In the present embodiment, thyristor adopts water-cooled mode to dispel the heat.
2.: bypass breaker
A two ends bypass breaker in parallel of thyristor controlled series compensation;
A, trigger bypass breaker when thyristor controlled series compensation breaks down and close, by the current transfer in thyristor controlled series compensation on bypass breaker, prevent from damaging thyristor controlled series compensation, simultaneously can prevent fault coverage from expanding;
B, in the transient process of electric power system generation single phase ground fault time trigger bypass breaker close, prevent from faulted phase voltage from falling causing thyristor controlled series compensation cannot triggered as normal, the output capacity of reactor is adjusted to maximum, suppresses secondary arc current and overvoltage;
C, when the power system stability of reactor parallel connection runs, closed bypass breaker, thyristor controlled series compensation does not flow through operating current thus reduces the running wastage of reactor.
(2) compensative winding
The outgoing line side of compensative winding connects filter unit, and for the harmonic current produced in the thyristor controlled series compensation work that filtering controlled winding connects, filter unit comprises Shunt Capacitor Unit, passive filter and active filter; Technical staff selects any one in connection Capacitor banks, passive filter and active filter according to actual condition.
1.: adopt the reactive power compensation scope that can expand reactor when passive filter or Shunt Capacitor Unit, reactive power compensation is provided to reactor, thus expand the output capacity scope of reactor, the harmonic current that filtering controlled winding exports, to reduce the harmonic component that reactor exports;
2.: also can adopt the harmonic component that can reduce the output of reactor during active filter, system power quality is improved.
Meanwhile, ground connection after the head end connection lightning arrester of every phase winding, for the protective winding when there is overvoltage fault.
3, the 6 pulsation TCT formula controllable parallel reactors that the utility model provides are in its stable state control procedure, by changing the Trigger Angle of thyristor controlled series compensation, realize the smooth adjustment of reactor output capacity, the TCT formula controllable parallel reactors of three winding structure and the similar of double-winding structure, when not having filter to put into operation, can 5 be produced, 7, 6k ± 1 subharmonic current, current total harmonic distortion rate reaches more than 6%, but based on each winding ampere-turn equilibrium principle, by being connected to the filter branch of compensative winding outlet, effectively reduce the harmonic content injecting first side winding electric current, decrease harmonic current in the loss of a winding and heating.
Two, 6 courses of work of pulsing TCT formula controllable parallel reactors that the utility model provides are:
When electric power system normally works, according to system voltage and reactive requirement, regulate the Trigger Angle of thyristor valve, change the capacity that reactor exports, carry out reactive power/voltage control.
When system jam, regulate thyristor valve trigger angle, control the closed of bypass breaker simultaneously, make 6 pulsation TCT formula controllable parallel reactors capacity be adjusted to rapidly maximum, suppress secondary arc current and overvoltage, improve reclosing success rate.After system transient modelling process terminates, open bypass breaker, recover thyristor valve work, 6 pulsation TCT formula controllable parallel reactors are returned to stable state control procedure.
Regulate reactive power owing to having quick and smooth, this 6 pulsation TCT formula controllable parallel reactors can be used as controllable parallel reactors or SVC application:
(1), time as controllable parallel reactors, the intermediate switching station, particularly new forms of energy that are applicable to ultra-high/extra-high voltage transmission of electricity long transmission line concentrate access on a large scale;
(2) when applying as SVC, in ultra-high/extra-high voltage transmission of electricity long transmission line intermediate switching station and direct current transportation sending end, receiving end AC Substation, promote the conveying capacity of AC transmission system, improve that direct current transportation is sent, receiving end Network Voltage Stability, shorten the recovery time of direct current transportation commutation failure.Installing TCR type SVC in ultra-high/extra-high voltage transmission of electricity long transmission line intermediate switching station etc. needs the occasion of extra installing transformer can substitute TCR type SVC with this 6 pulsation TCT formula controllable parallel reactors.
(3) 6 pulsation TCT formula controllable parallel reactors are applied in northwest wind-powered electricity generation when concentrating transmitting system:
The statistics of transmitting system is concentrated according to current northwest wind-powered electricity generation, wind power system about drops into 1600 ~ 1700 hours every year, in this period, system voltage can fluctuate with wind-powered electricity generation capacity output, by the output capacity regulating the trigger angle of thyristor to control 6 pulsation TCT formula controllable parallel reactors, thus systems stabilisation voltage, all the other time generator operations are stablized, the change of transmission line transmission capacity is little, 6 pulsation TCT formula controllable parallel reactors can be used as fixing shunt reactor and use, and effectively reduce the operating loss of 6 pulsation TCT formula controllable parallel reactors.
(4) in like manner, be applied in direct current system by 6 pulsation TCT formula controllable parallel reactors, when direct current system stable operation, 6 pulsation TCT formula controllable parallel reactors also can use as fixing shunt reactor.
Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the application's protection.
Claims (6)
1. 6 pulsation TCT formula controllable parallel reactors, described reactor comprises first side winding and secondary side winding, it is characterized in that, described first side winding is the three-phase windings of star connection, Y connection, is connected in parallel in electric power system; Described secondary side winding comprises controlled winding and compensative winding; Described controlled winding is the three-phase windings of star connection, Y connection, and the outgoing line side of every phase winding connects thyristor controlled series compensation; Described compensative winding is the three-phase windings of delta connection, and the outgoing line side of every phase winding connects filter unit;
By regulating the trigger delay angle size of thyristor in thyristor controlled series compensation, change the output capacity of described reactor;
Described filter unit, for the harmonic current produced in the thyristor controlled series compensation work that filtering controlled winding connects.
2. reactor as claimed in claim 1, it is characterized in that, described thyristor controlled series compensation comprises two thyristors of reverse parallel connection; The trigger delay angle controlled range of described thyristor is 90 °≤α≤180 °.
3. reactor as claimed in claim 1, is characterized in that, a two ends bypass breaker in parallel of described thyristor controlled series compensation; Trigger described bypass breaker to close when described thyristor controlled series compensation breaks down, by the current transfer in thyristor controlled series compensation on bypass breaker, prevent from damaging thyristor controlled series compensation;
In the transient process of electric power system generation single phase ground fault, trigger bypass breaker close, prevent from faulted phase voltage from falling causing thyristor controlled series compensation cannot triggered as normal;
Described reactor is connected in parallel in the electric power system of stable operation, closed described bypass breaker, and thyristor controlled series compensation does not pass through operating current thus reduces the running wastage of reactor.
4. reactor as claimed in claim 1, it is characterized in that, described filter unit comprises Shunt Capacitor Unit, passive filter and active filter;
Described Shunt Capacitor Unit and passive filter, the harmonic current that controlled winding described in filtering exports, provides reactive power compensation to described reactor, to reduce the harmonic component that described reactor exports, expands the output capacity scope of described reactor;
Described active filter, the harmonic current that controlled winding described in filtering exports, to reduce the harmonic component that described reactor exports.
5. reactor as claimed in claim 1, it is characterized in that, described first side winding is connected ground connection after lightning arrester with the head end of phase winding every in secondary side winding, for protective winding and thyristor controlled series compensation under over-voltage condition.
6. reactor as claimed in claim 1, is characterized in that, ground connection after the three-phase neutral-point solid ground of described first side winding or linked reactor; The three-phase neutral-point solid ground of described controlled winding.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420684965.2U CN204118755U (en) | 2014-11-14 | 2014-11-14 | 6 pulsation TCT formula controllable parallel reactors |
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| CN201420684965.2U CN204118755U (en) | 2014-11-14 | 2014-11-14 | 6 pulsation TCT formula controllable parallel reactors |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319790A (en) * | 2014-11-14 | 2015-01-28 | 国家电网公司 | Six-pulse TCT-type controllable paralleling reactor |
| CN104777379A (en) * | 2015-03-31 | 2015-07-15 | 华北电力大学 | Dynamic characteristic test system for single-phase controllable shunt reactor |
-
2014
- 2014-11-14 CN CN201420684965.2U patent/CN204118755U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104319790A (en) * | 2014-11-14 | 2015-01-28 | 国家电网公司 | Six-pulse TCT-type controllable paralleling reactor |
| CN104777379A (en) * | 2015-03-31 | 2015-07-15 | 华北电力大学 | Dynamic characteristic test system for single-phase controllable shunt reactor |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170601 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: China Electric Prime Technology Co., Ltd. Patentee after: State Grid Corporation of China Co-patentee after: State Grid Fujian Electric Power Co., Ltd. Co-patentee after: Electric Power Research Institute, State Grid Fujian Electric Power Co., Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: State Grid Smart Grid Institute Patentee before: State Grid Corporation of China Co-patentee before: China Electric Prime Technology Co., Ltd. Co-patentee before: State Grid Fujian Electric Power Co., Ltd. Co-patentee before: Electric Power Research Institute, State Grid Fujian Electric Power Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150121 Termination date: 20181114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |