CN205178486U - Poor high voltage filter capacitor device of doube bridge - Google Patents
Poor high voltage filter capacitor device of doube bridge Download PDFInfo
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- CN205178486U CN205178486U CN201520834969.9U CN201520834969U CN205178486U CN 205178486 U CN205178486 U CN 205178486U CN 201520834969 U CN201520834969 U CN 201520834969U CN 205178486 U CN205178486 U CN 205178486U
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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
- Y02E40/50—Arrangements for eliminating or reducing asymmetry in polyphase networks
Abstract
The utility model discloses a poor high voltage filter capacitor device of doube bridge, characterized by: including being the height that a style of calligraphy is connected in proper order, the low -voltage capacitor tower, single phase alternating current filter capacitor group, a current transformer, the pipe generating line, post insulators and steel rack, it is high, the low -voltage capacitor tower adopts the differential line of single bridge respectively, be that single phase alternating current filter capacitor group arranges according to the requirement of two electric bridges, be equipped with four condenser bridge arms on every electric bridge, intermediate potential department at every electric bridge is connected with the current transformer who is used for unbalance current to detect, capacitor bank flows past each current transformer under normal condition balanced current becomes more and more zero, whole electric bridge is arranged on base post insulators. The utility model discloses permit through being divided into two capacitor bank's no. 1 mutually, effectively reducing by a component population among the bridge connection and make the setting value improve at double under the unchangeable circumstances of overvoltage multiple at the holding element to it improves to make uneven reliability of protection shown.
Description
Technical field
The utility model relates to high voltage dc transmission technology, is specially a kind of Double-bridge difference high-voltage alternating filter capacitor device.
Background technology
Along with the fast development of ± 800 kilovolts and ± 1100 kilovolt high voltage DC engineerings, ac filter capacitor device presents the feature of electric pressure more and more higher (750kV ~ 1000kV), single-phase capacity increasing (being greater than 150Mvar), not only constantly better a record on the order of magnitude, and consider the height of Large-scale High-Pressure ac filter Capacitor banks application level technically.
Single phase alternating current (A.C.) filter capacitor device capacity is large, and capacitor number of units (can reach more than 200 ~ 300) is just many, and capacitor element just more (can reach 1 ~ 20,000).For single-phase Internal fuse ac filter Capacitor banks; protective device will tell 1 ~ 2 element fault in 1 ~ 20,000 element, and the requirement whether resolution can meet protection reliability will determine the security perimeter whether Capacitor banks can be set up Accident prevention and spread.How setting up the unbalance protection of high sensitivity, high reliability, is one of Large-scale High-Pressure ac filter Capacitor banks safety problem that must solve.
In extra-high voltage direct-current engineering, ac filter capacitor device all adopts neutral-point solid ground mode; single bridge differential line improves unbalance protection reliability most effectual way; all adopt this mode of connection at the following ac filter capacitor device of 500kV grade, apply relatively extensive.
So-called single bridge difference (single H type) wiring ac filter Capacitor banks is exactly that single-phase electricity container group is arranged to four capacitor brachium pontis (C1, C2, C3, C4) by the requirement of an electric bridge, and balanced balanced current that single-phase electricity container group flows through current transformer TA is in normal state gone to zero (see figure 1).
For more than 500kV grade large-scale ac filter Capacitor banks, capacitor unit number is a lot, and the probability broken down in symmetric position be can not ignore.According to the viewpoint of IEEEC37.99-2000 " IEEE Shunt Capacitor Unit protection directive/guide ", the requirement of two-part protection is exactly before tripping operation, set up one-level report to the police, once define Internal fuse action, action is in warning, so that scheme of arrangement maintenance.The phenomenon broken down in symmetric position has not only fundamentally been stopped in two-part protection, has blocked " leak " that unbalance protection is born, and makes safe precaution measure become passive passive into positive.Two-part unbalance protection generally adopts at present in the filtering capacitor group of DC engineering.
Initial unbalance value is main relevant with the temperature characterisitic of capacitor with the manufacture deviation of capacitor.Although the manufacture deviation of capacitor by improving in the trim of Capacitor banks inside, finally can be subject to the restriction of certainty of measurement.The capacitance deviation produced by capacitor temperature characteristic depends primarily on distribution and the change in Capacitor banks temperature field.When setting value cannot escape initial unbalance value, just mean uneven change can frequent malfunction, reduce Capacitor banks effective run time, increase maintenance cost, even can have a strong impact on the normal operation of ac filter Capacitor banks.
When being not difficult to find when bridge difference carries out the calculating of two-part protection seting routinely to large-scale ac filter Capacitor banks: even if capacitance deviation is down to minimum, protection seting value still cannot be verified by initial unbalance.
In the various factors of analyzing influence setting value size, improving element allows overvoltage multiple that output signal no doubt can be made to increase, but this exchanges for cost with the more margin of safety of sacrificial capacitors, be in fact allow ac filter Capacitor banks continue to run under harsher state.Obviously can not go to emit security risk like this for more than 500kV grade large-scale ac filter Capacitor banks, be necessary to solve this technical problem.
Summary of the invention
Technical problem to be solved in the utility model is for prior art above shortcomings; there is provided one effectively can improve high-voltage alternating filtering capacitor group unbalance protection setting value, thus improve the Double-bridge difference high-voltage alternating filter capacitor device of capacitor reliability.
In order to realize technical problem to be solved, the utility model adopts following technical scheme:
A kind of Double-bridge difference high-voltage alternating filter capacitor device, comprise the height be linked in sequence in yi word pattern, secondary capacitor tower, single phase alternating current (A.C.) filtering capacitor group, current transformer, pipe bus, post insulator and steel stand, high, secondary capacitor tower adopts single bridge differential line respectively, namely single phase alternating current (A.C.) filtering capacitor group is arranged by the requirement of two electric bridges, each electric bridge is provided with four capacitor brachium pontis, the current transformer detected for unsymmetrical current is connected with at the intermediate potential place of each electric bridge, the balanced balanced current that Capacitor banks flows through each current transformer in normal state goes to zero, whole bridge arrangement is on pedestal column insulator.
Described two electric bridge series/parallel are between high pressure end of incoming cables HV and low-pressure line-outgoing end LV.
Described high-voltage capacitor tower is connected by pipe bus with secondary capacitor tower.
Preferably two electric bridges are Double-bridge difference structure, i.e. double H-type bridge difference structure wiring capacitance device group.
Described pedestal column insulator is provided with steel stand, and capacitor arrangement is on steel stand.
It is outside that described current transformer is arranged in steel stand.
So-called double H-type bridge difference structure wiring capacitance device group is exactly that any single phase alternating current (A.C.) filter capacitor group is arranged to four capacitor C brachium pontis separately by the requirement of two electric bridges (vertical or horizontal), Capacitor banks is made to flow through current transformer TA1 in normal state, the unsymmetrical current of TA2 goes to zero, like this, the utility model is when holding element allows overvoltage multiple constant, by single phase alternating current (A.C.) filter capacitor group is divided into two, two bridges (double H-type) are made into by original bridge shape (single H type) wiring, by the component population effectively reduced in a Gratz connection, setting value is significantly improved, in other words conj.or perhaps initial unbalance value is reduced at double.Obviously, not only effectively improve the setting value of unbalance protection by reducing monitoring range, thus the reliability of unbalance protection is significantly improved.
When two Double-bridge differences (i.e. double H-type) are for cascaded structure, Double-bridge difference structure is longitudinally;
When two Double-bridge differences (i.e. double H-type) are for parallel-connection structure, Double-bridge difference structure is laterally;
Longitudinal Double-bridge difference can improve setting value; Horizontal Double-bridge difference can reduce initial unbalance value.
When the scale of ac filter Capacitor banks is enough large, can single phase alternating current (A.C.) filtering capacitor component become electric bridge more more than Double-bridge difference, but cost can higher, structure can be more complicated.
The utility model has the advantages that:
1, unbalance protection reliability is high, safe and reliable, protect not easily malfunction.No matter be adopt longitudinal Double-bridge difference, or horizontal Double-bridge difference, protection safety factor can be significantly improved.Safety factor is higher, and capacitor runs more safe and reliable, protection more not easily malfunction, and during operation, mistrip probability is low, reduces product maintenance and maintenance.
2, Double-bridge difference wiring is relatively simple, and the risk in installation process is little; Integral arrangement is compact, takes up an area little.
3, the single-phase capacity configuration of high-voltage alternating filter capacitor device can be improved further, reduce extra-high voltage project input cost.
4, the needs of ac filter capacitance unbalance protection reliability in the higher DC engineering of electric pressure can be met.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of single bridge difference in prior art (single H type) wiring single phase alternating current (A.C.) filtering capacitor group.
Fig. 2 is the schematic diagram of the utility model Double-bridge difference (double H-type) wiring single phase alternating current (A.C.) filtering capacitor group (longitudinal Double-bridge difference).
Fig. 3 is the schematic diagram of the utility model Double-bridge difference (double H-type) wiring single phase alternating current (A.C.) filtering capacitor group (horizontal Double-bridge difference).
Fig. 4 is the structure chart of longitudinal Double-bridge difference (double H-type) wiring ac filter Capacitor banks in Fig. 2.
Fig. 5 is the left side view of Fig. 4.
Fig. 6 is the structure chart of longitudinal Double-bridge difference (double H-type) wiring ac filter Capacitor banks in Fig. 3.
Fig. 7 is the left side view of Fig. 6.
In figure: 1-inner fuse capacitor 2-connects low-pressure line-outgoing end C1, C2, C3, C4, C5, C6, C7, C8-capacitor brachium pontis TA1, TA2-current transformer of the high pressure end of incoming cables LV-Capacitor banks of wire 3-pedestal column insulator 4-steel stand 5-pipe bus 6-current transformer 7-interlayer post insulator 8-earth terminal C-inner fuse capacitor TA-current transformer HV-Capacitor banks.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail.
Embodiment is nonlimiting examples of the present utility model below.
Embodiment 1:
Shown in Fig. 4,5 is the view of TAL750-151552/592-1QW type single phase alternating current (A.C.) filter capacitor device, the schematic diagram of longitudinal Double-bridge difference (double H-type) wiring single phase alternating current (A.C.) filtering capacitor group in this capacitor device corresponding diagram 2, it can be implemented by mode below.
In the present embodiment, single phase alternating current (A.C.) filtering capacitor component is that two Capacitor stack are arranged, i.e. high-pressure tower and lower pressure column, an electric bridge arranged by each tower, and each tower is placed on pedestal column insulator 3.
Two towers are respectively furnished with 8 layer capacitor unit, every layer capacitor unit divides two rows to lie on one's side to be arranged on hot galvanizing shaped steel stand 4.Upper 4 layer capacitor unit on front side of high-pressure tower form the C1 of electric bridge, and lower 4 layer capacitors form the C3 of electric bridge; Upper 4 layer capacitors of rear side form the C2 of electric bridge, and lower 4 layer capacitors form the C4 of electric bridge.Upper 4 layer capacitor unit on front side of lower pressure column form the C5 of electric bridge, and lower 4 layer capacitors form the C7 of electric bridge; Upper 4 layer capacitors of rear side form the C6 of electric bridge, and lower 4 layer capacitors form the C8 of electric bridge.Post insulator 7 is provided with between every 1 layer capacitor stand.
High-pressure tower top is power supply high pressure end of incoming cables HV, forms two branch roads arrive downwards at the bottom of tower by the capacitor connection in series-parallel of both sides, front and back, connects unsymmetrical current detection current instrument transformer TA1 form an electric bridge at the intermediate potential place of two branch roads.High-pressure tower bottom is connected to lower pressure column top by pipe bus 5, lower pressure column forms two branch roads by the capacitor connection in series-parallel of both sides, front and back equally and arrives downwards at the bottom of tower and connect into low-pressure line-outgoing end LV, connects unsymmetrical current detection current instrument transformer TA2 form another electric bridge at the intermediate potential place of two branch roads.
The both sides of each steel stand 4 respectively have one for overhauling time earth terminal 8.Current transformer TA1, TA2 are arranged in the outside (simple for structure, arrange clear, easy to maintenance) of each tower.
Embodiment 2:
Shown in Fig. 6,7 is the view of TAL750-151552/592-1QW type single phase alternating current (A.C.) filter capacitor device, and the schematic diagram of horizontal Double-bridge difference (double H-type) wiring capacitance device group in this capacitor device corresponding diagram 3, it can be implemented by mode below.
In the present embodiment, single phase alternating current (A.C.) filtering capacitor component is that two Capacitor stack are arranged, i.e. Qian Ta and Hou Ta, an electric bridge arranged by each tower, and each tower is placed on pedestal column insulator 3.
Two towers are respectively furnished with 8 layer capacitor unit, every layer capacitor unit divides two rows to lie on one's side to be arranged on hot galvanizing shaped steel stand 4.Upper 4 layer capacitor unit on front side of front tower form the C1 of electric bridge, and lower 4 layer capacitors form the C3 of electric bridge; Upper 4 layer capacitors of rear side form the C2 of electric bridge, and lower 4 layer capacitors form the C4 of electric bridge.Upper 4 layer capacitor unit on front side of rear tower form the C5 of electric bridge, and lower 4 layer capacitors form the C7 of electric bridge; Upper 4 layer capacitors of rear side form the C6 of electric bridge, and lower 4 layer capacitors form the C8 of electric bridge.Post insulator 7 is provided with between every 1 layer capacitor stand.
Forward and backward tower top end is power supply high pressure end of incoming cables HV, form two branch roads by the capacitor connection in series-parallel of both sides, front and back to arrive downwards at the bottom of tower and connect into low-pressure line-outgoing end LV, connect unsymmetrical current detection current instrument transformer TA1, TA2 at the intermediate potential place of two branch roads respectively and form two electric bridges.
The both sides of each steel stand 4 respectively have one for overhauling time earth terminal 8.Current transformer TA1, TA2 are arranged in the outside of each tower.
Above-described embodiment, be only the specific case further described the purpose of this utility model, technical scheme and beneficial effect, the utility model is not defined in this.All make within scope of disclosure of the present utility model any amendment, equivalent replacement, improvement etc., be all included within protection range of the present utility model.
Claims (6)
1. a Double-bridge difference high-voltage alternating filter capacitor device, it is characterized in that: comprise the height be linked in sequence in yi word pattern, secondary capacitor tower, single phase alternating current (A.C.) filtering capacitor group, current transformer, pipe bus, post insulator and steel stand, high, secondary capacitor tower adopts single bridge differential line respectively, namely single phase alternating current (A.C.) filtering capacitor group is arranged by the requirement of two electric bridges, each electric bridge is provided with four capacitor brachium pontis, the current transformer detected for unsymmetrical current is connected with at the intermediate potential place of each electric bridge, the balanced balanced current that Capacitor banks flows through each current transformer in normal state goes to zero, whole bridge arrangement is on pedestal column insulator,
Described high-voltage capacitor tower is connected by pipe bus with secondary capacitor tower;
Described pedestal column insulator is provided with steel stand, and capacitor arrangement is on steel stand;
It is outside that described current transformer is arranged in steel stand.
2. Double-bridge difference high-voltage alternating filter capacitor device according to claim 1, is characterized in that: described two electric bridges are connected between high pressure end of incoming cables HV and low-pressure line-outgoing end LV.
3. Double-bridge difference high-voltage alternating filter capacitor device according to claim 1, is characterized in that: described two electric bridges are connected in parallel between high pressure end of incoming cables HV and low-pressure line-outgoing end LV.
4. Double-bridge difference high-voltage alternating filter capacitor device according to claim 1, is characterized in that: described two electric bridges are Double-bridge difference structure, i.e. double H-type bridge difference structure wiring capacitance device group.
5. Double-bridge difference high-voltage alternating filter capacitor device according to claim 4, it is characterized in that: to be any single phase alternating current (A.C.) filter capacitor group be arranged to four capacitor C brachium pontis by the requirement that two electric bridges are vertical or horizontal to described double H-type bridge difference structure wiring capacitance device group separately, the balanced balanced current that Capacitor banks flows through current transformer TA1, TA2 is in normal state gone to zero, when holding element allows overvoltage multiple constant, by single phase alternating current (A.C.) filter capacitor group is divided into two, make dual H-bridge type into by original single H Gratz connection.
6. Double-bridge difference high-voltage alternating filter capacitor device according to claim 1, is characterized in that: when described Double-bridge difference is cascaded structure, and Double-bridge difference structure is longitudinally; When double H-type bridge difference is parallel-connection structure, Double-bridge difference structure is laterally; Longitudinal Double-bridge difference can improve setting value; Horizontal Double-bridge difference can reduce initial unbalance value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520834969.9U CN205178486U (en) | 2015-10-27 | 2015-10-27 | Poor high voltage filter capacitor device of doube bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520834969.9U CN205178486U (en) | 2015-10-27 | 2015-10-27 | Poor high voltage filter capacitor device of doube bridge |
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| CN205178486U true CN205178486U (en) | 2016-04-20 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707102A (en) * | 2016-12-09 | 2017-05-24 | 中国西电电气股份有限公司 | Capacitor bank main wiring structure and fault judgment method |
| CN113702780A (en) * | 2021-08-20 | 2021-11-26 | 中国南方电网有限责任公司超高压输电公司大理局 | BP neural network-based high-voltage capacitor online monitoring method and device |
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2015
- 2015-10-27 CN CN201520834969.9U patent/CN205178486U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707102A (en) * | 2016-12-09 | 2017-05-24 | 中国西电电气股份有限公司 | Capacitor bank main wiring structure and fault judgment method |
| CN113702780A (en) * | 2021-08-20 | 2021-11-26 | 中国南方电网有限责任公司超高压输电公司大理局 | BP neural network-based high-voltage capacitor online monitoring method and device |
| CN113702780B (en) * | 2021-08-20 | 2024-01-19 | 中国南方电网有限责任公司超高压输电公司大理局 | BP neural network-based high-voltage power supply online monitoring method and device |
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