CN203278252U - Dynamic reactive power compensation equipment suitable for multi-direct-current feed-in power grid - Google Patents
Dynamic reactive power compensation equipment suitable for multi-direct-current feed-in power grid Download PDFInfo
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- CN203278252U CN203278252U CN 201320294538 CN201320294538U CN203278252U CN 203278252 U CN203278252 U CN 203278252U CN 201320294538 CN201320294538 CN 201320294538 CN 201320294538 U CN201320294538 U CN 201320294538U CN 203278252 U CN203278252 U CN 203278252U
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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
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- 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 discloses dynamic reactive power compensation equipment suitable for a multi-direct-current feed-in power grid. The equipment comprises electric reactors, capacitors, thyristor valves and bypass circuit breakers. Each thyristor valve is connected in parallel with each bypass circuit breaker and then a high voltage terminal is connected with a low voltage terminal of the electric reactor. The thyristor valve is connected in parallel with the bypass circuit breaker and then a low voltage terminal is connected with a high voltage terminal of the capacitor. Low voltage terminals of three phases of the capacitors are directly connected. High voltage sides of the three phases of the electric reactors are connected with a bus in a transformer substation through an isolation disconnecting link and a circuit breaker. Position signals of the bypass circuit breakers, the isolation disconnecting link and the circuit breaker, state signals of the thyristor valves, each current measuring signal and each voltage measuring signal access a control protection system. Thyristor valve, bypass circuit breaker and breaker control commands are emitted by the control protection system. By using the equipment of the utility model, reliability of dynamic reactive power compensation equipment operation can be greatly increased; operation maintenance workload is reduced; a water cooling device does not need to be adopted; dynamic reactive power compensation engineering cost is greatly reduced; the original capacitance compensation device of an established transformer substation can be fully used. Operation of the equipment of the utility model is simple and control is convenient.
Description
Technical field
The utility model is a kind of dynamic reactive compensation device that is applicable to the multi-infeed DC electrical network, belongs to the innovative technology of the dynamic reactive compensation device that is applicable to the multi-infeed DC electrical network.
Background technology
Concentrate the large electrical network of drop point for alternating current-direct current mixed running, many times high-capacity direct currents, the fault of receiving end AC system may cause direct current while commutation failure many times, producing complicated alternating current-direct current influences each other, this class electrical network is subjected to end load intensive, the induction motor ratio is higher, load center area shortage power supply support, and the dynamic reactive of response is not enough fast, the dynamic electric voltage stable problem is outstanding, threatens system safety.Dynamic passive compensation can quick adjustment System Reactive Power power, strengthens the enabling capabilities of system's dynamic electric voltage, is one of important measures of maintaining such power grid security.Static passive compensation device (Static Var Compensator, SVC) and STATCOM (Static Synchronous Compensator, STATCOM) are two kinds of important device the most ripe in dynamic passive compensation.These two kinds of devices have obtained certain application in China's electrical network, to keeping the system busbar voltage stabilization, improving power system transient stability effect is preferably arranged.But these two kinds devices just must adopt water cooling equipment as long as capacity acquires a certain degree, not only invest high, reliability reduces, the operation maintenance workload is larger, and installs also more difficultly in built transformer station, be not suitable for using on a large scale.
Summary of the invention
The purpose of this utility model is to consider the problems referred to above and a kind of dynamic reactive compensation device reliability of operation that can greatly improve is provided, and reduces the dynamic reactive compensation device that is applicable to the multi-infeed DC electrical network and the control method thereof of operation maintenance workload.The utility model does not need to adopt water cooling equipment, significantly reduces the project cost of dynamic reactive compensation device, can also take full advantage of the original Electric capacity compensation device of built transformer station.The utility model is simple to operate, and it is convenient to control.
the technical solution of the utility model is: the dynamic reactive compensation device that is applicable to the multi-infeed DC electrical network of the present utility model includes reactor La, Lb, Lc, capacitor Ca, Cb, Cc, thyristor valve SVa, SVb, SVc, bypass breaker Ba, Bb, Bc, the thyristor valve SVa high-pressure side that parallel connection is connected with bypass breaker Ba is connected with the low-pressure end of reactor La, and the thyristor valve SVa low-pressure end that parallel connection is connected with bypass breaker Ba is connected with the high-pressure side of capacitor Ca, the thyristor valve SVb high-pressure side that parallel connection is connected with bypass breaker Bb is connected with the low-pressure end of reactor Lb, and the thyristor valve SVb low-pressure end that parallel connection is connected with bypass breaker Bb is connected with the high-pressure side of capacitor Cb, the thyristor valve SVc high-pressure side that parallel connection is connected with bypass breaker Bc is connected with the low-pressure end of reactor Lc, and the thyristor valve SVc low-pressure end that parallel connection is connected with bypass breaker Bc is connected with the high-pressure side of capacitor Cc, and the low-pressure end of capacitor Ca, Cb, Cc directly connects, reactor La, Lb, the high-pressure side of Lc is connected by the interior bus of isolation switch K and circuit breaker Q F and Substation Station, and isolation switch K, circuit breaker Q F, bypass breaker Ba, Bb, the position signalling of Bc and current signal Ia, Ib, Ic and voltage signal Ua, Ub, Uc, Uca, Ucb, Ucc, Ula, Ulb, Ulc access control protection system CP, thyristor valve SVa, SVb, the voltage signal UA of the status signal of SVc and upper level bus, UB, the control signal input of UC access control protection system CP, control control signal output and the thyristor valve SVa of protection system CP, SVb, the SVc connection reaches and bypass breaker Ba, Bb, Bc connects and is connected with circuit breaker Q F, control protection system CP and send thyristor valve SVa, SVb, the triggering signal of SVc conducting or locking and send bypass breaker Ba, Bb, deciliter order of Bc and the trip signal of circuit breaker Q F.
The utility model is owing to adopting the triggering moment of the most approaching zero the moment of thyristor valve both end voltage as thyristor valve, can realize that each capacitor branch road is level and smooth, real-time switching, can realize completing the input of capacitor branch road in 20ms, be not subjected to the impact of capacitor two ends residual voltage, can not impact electrical network.In addition, no matter the capacitor residual voltage is any value, the capacitor branch road all can be in real time, drop into without impacting.Have a good application prospect.The utility model is that a kind of design is ingenious, function admirable, the convenient and practical dynamic reactive compensation device that is applicable to the multi-infeed DC electrical network.
Description of drawings
Fig. 1 is the structural representation of dynamic reactive compensation device of the present utility model.
Fig. 2 is the structural representation that dynamic reactive compensation device of the present utility model is applied to 500kV transformer station.
Fig. 3 is the structural representation that dynamic reactive compensation device of the present utility model is applied to 220kV transformer station.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model patent is further described.Embodiment:
the structural representation of the utility model dynamic reactive compensation device as shown in Figure 1, the dynamic reactive compensation device that is applicable to the multi-infeed DC electrical network of the present utility model, include reactor La, Lb, Lc, capacitor Ca, Cb, Cc, thyristor valve SVa, SVb, SVc, bypass breaker Ba, Bb, Bc, the thyristor valve SVa high-pressure side that parallel connection is connected with bypass breaker Ba is connected with the low-pressure end of reactor La, and the thyristor valve SVa low-pressure end that parallel connection is connected with bypass breaker Ba is connected with the high-pressure side of capacitor Ca, the thyristor valve SVb high-pressure side that parallel connection is connected with bypass breaker Bb is connected with the low-pressure end of reactor Lb, and the thyristor valve SVb low-pressure end that parallel connection is connected with bypass breaker Bb is connected with the high-pressure side of capacitor Cb, the thyristor valve SVc high-pressure side that parallel connection is connected with bypass breaker Bc is connected with the low-pressure end of reactor Lc, and the thyristor valve SVc low-pressure end that parallel connection is connected with bypass breaker Bc is connected with the high-pressure side of capacitor Cc, and the low-pressure end of capacitor Ca, Cb, Cc directly connects, reactor La, Lb, the high-pressure side of Lc is connected by the interior bus of isolation switch K and circuit breaker Q F and Substation Station, and isolation switch K, circuit breaker Q F, bypass breaker Ba, Bb, the position signalling of Bc and current signal Ia, Ib, Ic and voltage signal Ua, Ub, Uc, Uca, Ucb, Ucc, Ula, Ulb, Ulc access control protection system CP, thyristor valve SVa, SVb, the voltage signal UA of the status signal of SVc and upper level bus, UB, the control signal input of UC access control protection system CP, control control signal output and the thyristor valve SVa of protection system CP, SVb, the SVc connection reaches and bypass breaker Ba, Bb, Bc connects and is connected with circuit breaker Q F, control protection system CP and send thyristor valve SVa, SVb, the triggering signal of SVc conducting or locking and send bypass breaker Ba, Bb, deciliter order of Bc and the trip signal of circuit breaker Q F.In the present embodiment, the bus in Substation Station is 35kV or 10kV, and the high-pressure side of reactor La, Lb, Lc is connected with the interior 35kV of Substation Station or 10kV bus by isolation switch K and circuit breaker Q F.
The utility model is applicable to the control method of the dynamic reactive compensation device of multi-infeed DC electrical network; above-mentioned when monitoring access point busbar voltage and higher level's busbar voltage and fall amplitude and speed and surpass set point; control the trigger command that protection system CP sends thyristor valve SVa, SVb, SVc, the triggering method of thyristor valve SVa, SVb, SVc is:
1) control protection system CP Real-time Collection thyristor valve SVa, high side voltage Ula, Ulb, Ulc and thyristor valve SVa, the SVb of SVb, SVc, SVc low-pressure side voltage U ca, Ucb, Ucc, thyristor valve both end voltage Ula-Uca, Ulb-Ucb, Ulc-Ucc and thyristor valve low-pressure side voltage U ca, Ucb, Ucc are consisted of as reactor and capacitor the foundation that branch road drops into the moment;
2) as thyristor valve SVa, SVb, SVc not during conducting, thyristor valve high side voltage Ula, Ulb, Ulc equal respectively busbar voltage Ua, Ub, Uc, and thyristor valve low-pressure side voltage U ca, Ucb, Ucc are the residual voltage on capacitor;
3) when capacitor Ca, Cb, the upper residual voltage of Cc less than system voltage, and thyristor valve SVa, SVb, when there is zero crossing in the SVc both end voltage, with the zero crossing of thyristor valve both end voltage Ula-Uca, Ulb-Ucb, Ulc-Ucc as the triggering of thyristor valve constantly;
4) when capacitor Ca, Cb, the upper residual voltage of Cc during greater than the system voltage peak value, there is not zero crossing in the thyristor valve both end voltage, select the most approaching zero the moment of thyristor valve both end voltage Ula-Uca, Ulb-Ucb, Ulc-Ucc as the triggering of thyristor valve constantly, as thyristor valve both end voltage Ula-Uca, Ulb-Ucb, Ulc-Ucc greater than zero the time, with high side voltage Ula, the Ulb of thyristor valve SVa, SVb, SVc, Ulc negative peak as triggering constantly; Thyristor valve both end voltage Ula-Uca, Ulb-Ucb, Ulc-Ucc less than zero the time, with high side voltage Ula, the Ulb of thyristor valve SVa, SVb, SVc, Ulc positive peak as triggering constantly;
Send the trigger command while of thyristor valve SVa, SVb, SVc at control protection system CP; control the close commands that protection system CP sends corresponding bypass breaker Ba, Bb, Bc; after determining bypass breaker Ba, Bb, Bc closure, the trigger command of cancelling thyristor valve SVa, SVb, SVc.
Fig. 2 is that dynamic reactive compensation device of the present utility model is applied to the 500kV embodiment of transformer station.The utility model dynamic reactive compensation device is connected on the 35kV side of the 500kV 500kV of transformer station main transformer, in the present embodiment, dynamic reactive compensation device is connected on the 35kV bus in Substation Station, and the high-pressure side of reactor La, Lb, Lc is connected with 35k bus in Substation Station by isolation switch K and circuit breaker Q F.
Fig. 3 is that dynamic reactive compensation device of the present utility model is applied to the 220kV embodiment of transformer station.The utility model dynamic reactive compensation device is connected on the 10kV side of the 220kV 220kV of transformer station main transformer, in the present embodiment, dynamic reactive compensation device is connected on the 10kV bus in Substation Station, and the high-pressure side of reactor La, Lb, Lc is connected with 10kV bus in Substation Station by isolation switch K and circuit breaker Q F.
Claims (1)
1. a dynamic reactive compensation device that is applicable to the multi-infeed DC electrical network, is characterized in that including reactor La, Lb, Lc, capacitor Ca, Cb, Cc, thyristor valve SVa, SVb, SVc, bypass breaker Ba, Bb, Bc, the thyristor valve SVa high-pressure side that parallel connection is connected with bypass breaker Ba is connected with the low-pressure end of reactor La, and the thyristor valve SVa low-pressure end that parallel connection is connected with bypass breaker Ba is connected with the high-pressure side of capacitor Ca, the thyristor valve SVb high-pressure side that parallel connection is connected with bypass breaker Bb is connected with the low-pressure end of reactor Lb, and the thyristor valve SVb low-pressure end that parallel connection is connected with bypass breaker Bb is connected with the high-pressure side of capacitor Cb, the thyristor valve SVc high-pressure side that parallel connection is connected with bypass breaker Bc is connected with the low-pressure end of reactor Lc, and the thyristor valve SVc low-pressure end that parallel connection is connected with bypass breaker Bc is connected with the high-pressure side of capacitor Cc, and the low-pressure end of capacitor Ca, Cb, Cc directly connects, reactor La, Lb, the high-pressure side of Lc is connected by the interior bus of isolation switch K and circuit breaker Q F and Substation Station, and isolation switch K, circuit breaker Q F, bypass breaker Ba, Bb, the position signalling of Bc and current signal Ia, Ib, Ic and voltage signal Ua, Ub, Uc, Uca, Ucb, Ucc, Ula, Ulb, Ulc access control protection system CP, thyristor valve SVa, SVb, the voltage signal UA of the status signal of SVc and upper level bus, UB, the control signal input of UC access control protection system CP, control control signal output and the thyristor valve SVa of protection system CP, SVb, the SVc connection reaches and bypass breaker Ba, Bb, Bc connects and is connected with circuit breaker Q F, control protection system CP and send thyristor valve SVa, SVb, the triggering signal of SVc conducting or locking and send bypass breaker Ba, Bb, deciliter order of Bc and the trip signal of circuit breaker Q F.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320294538 CN203278252U (en) | 2013-05-27 | 2013-05-27 | Dynamic reactive power compensation equipment suitable for multi-direct-current feed-in power grid |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320294538 CN203278252U (en) | 2013-05-27 | 2013-05-27 | Dynamic reactive power compensation equipment suitable for multi-direct-current feed-in power grid |
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| CN203278252U true CN203278252U (en) | 2013-11-06 |
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| CN 201320294538 Expired - Lifetime CN203278252U (en) | 2013-05-27 | 2013-05-27 | Dynamic reactive power compensation equipment suitable for multi-direct-current feed-in power grid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326373A (en) * | 2013-05-27 | 2013-09-25 | 华南理工大学 | Dynamic reactive power compensation device suitable for multiple-direct-current feed-in grid and control method of dynamic reactive power compensation device |
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2013
- 2013-05-27 CN CN 201320294538 patent/CN203278252U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103326373A (en) * | 2013-05-27 | 2013-09-25 | 华南理工大学 | Dynamic reactive power compensation device suitable for multiple-direct-current feed-in grid and control method of dynamic reactive power compensation device |
| CN103326373B (en) * | 2013-05-27 | 2015-07-22 | 华南理工大学 | Dynamic reactive power compensation device suitable for multiple-direct-current feed-in grid and control method of dynamic reactive power compensation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Juanjuan Inventor after: Fu Chuang Inventor before: Wang Juanjuan Inventor before: Fu Chuang |
|
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |
|
| CX01 | Expiry of patent term |