CN108493954B - Micro-inrush current auxiliary closing system for parallel capacitor - Google Patents
Micro-inrush current auxiliary closing system for parallel capacitor Download PDFInfo
- Publication number
- CN108493954B CN108493954B CN201810422267.8A CN201810422267A CN108493954B CN 108493954 B CN108493954 B CN 108493954B CN 201810422267 A CN201810422267 A CN 201810422267A CN 108493954 B CN108493954 B CN 108493954B
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- China
- Prior art keywords
- spark gap
- capacitor
- circuit breaker
- controller
- gap gpa
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- 239000003990 capacitor Substances 0.000 title claims abstract description 35
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000006378 damage Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1864—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein the stepless control of reactive power is obtained by at least one reactive element connected in series with a semiconductor switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/06—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage using spark-gap arresters
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention relates to a micro-inrush current auxiliary closing system of a parallel capacitor, which comprises a spark gap GPA, a transformer T and a controller ZK; the wire inlet end of the spark gap GPA is connected with the wire inlet end of the circuit breaker K, the wire outlet end of the spark gap GPA is connected with the wire outlet end of the circuit breaker K, the trigger electrode of the spark gap GPA is connected with the first output end A end of the controller ZK, and the cathode of the spark gap GPA is connected with the second output end B end of the controller ZK; the input end of the transformer T is connected with the wire inlet end of the spark gap GPA, and the output end of the transformer T is connected with the input end C end of the controller ZK. The invention has the advantages of simple structure, safety, reliability and the like, is conducted before the breaker contact is not closed and pre-discharge in the parallel compensation device, can reduce the closing inrush current of the capacitor C to about 2.1 times of rated current, has the conducting precision of us level, and effectively solves the influence of the closing inrush current on the operation of a power grid and equipment.
Description
Technical Field
The invention relates to the technical field of closing inrush current inhibition, in particular to a micro-inrush current auxiliary closing system of a parallel capacitor.
Background
When the parallel capacitor is put in, the problems of switching-on surge, amplifying higher harmonic waves and the like can be generated, and great negative influence is brought to the operation of a power grid and equipment. At present, three main methods for inhibiting the closing inrush current of the parallel capacitor are as follows: (1) the switching-on inrush current is restrained by a series reactor method; (2) the switching inrush current is restrained by a series resistor method; (3) and the switching-on inrush current is restrained by a time-sharing phase-splitting method of the circuit breaker. All three methods have obvious disadvantages: (1) defects of the series reactor method: a. the switching-on inrush current can only be limited to 5-6 times of rated current, and the switching-on inrush current still has great harm to a power grid; b. the reactor is connected into the loop in series for a long time, so that the electric energy loss is relatively large; (2) the disadvantage of the series resistor approach: the primary switching-on surge impact is changed into the secondary switching-on surge impact, and the damage of the switching-on surge to the power grid and equipment is not reduced; (3) a, the current power operation regulations prohibit the time-sharing phase-splitting operation which can lead to non-full-phase operation; b. the switching-on precision requirement of the circuit breaker is high (ms level); c. the pre-discharge cannot be solved.
Disclosure of Invention
The invention aims to provide a parallel capacitor micro-inrush current auxiliary closing system which reduces the closing inrush current generated when a parallel capacitor is put into operation to about 2.1 times of rated current, and can effectively solve the influence of the capacitor closing inrush current on a power grid and equipment operation by controlling a spark gap GPA in a time-sharing split phase to conduct before a breaker contact is not closed and pre-discharge in a parallel compensation device, wherein the closing accuracy is in a us level.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the micro-inrush current auxiliary switching-on system of the parallel capacitor comprises a spark gap GPA for assisting the switching-on of a breaker K, a transformer T for transmitting a system voltage signal to a controller ZK and the controller ZK; the wire inlet end of the spark gap GPA is connected with the wire inlet end of the circuit breaker K, the wire outlet end of the spark gap GPA is connected with the wire outlet end of the circuit breaker K, the trigger electrode of the spark gap GPA is connected with the first output end A end of the controller ZK, and the cathode of the spark gap GPA is connected with the second output end B end of the controller ZK; the input end of the transformer T is connected with the wire inlet end of the spark gap GPA, and the output end of the transformer T is connected with the input end C end of the controller ZK; after receiving a switching-on command of the breaker K, the controller ZK controls the spark gap GPA to be conducted in a time-sharing and phase-splitting mode.
And the wire inlet end of the circuit breaker K is connected with a power transmission line in a power grid in parallel, the wire outlet end of the circuit breaker K is connected with the wire inlet end of the capacitor C, the wire outlet end of the capacitor C is grounded, and the circuit breaker K and the capacitor C jointly form a parallel compensation device.
The parallel compensation device is an existing reactive compensation device in a power grid and comprises a breaker K for controlling the switching of a capacitor C and the capacitor C for providing reactive compensation, wherein the capacitor C is connected in a Y mode and a delta mode.
According to the technical scheme, the beneficial effects of the invention are as follows: the invention has the advantages of simple structure, safety, reliability and the like, is conducted before the breaker contact is not closed and pre-discharge in the parallel compensation device, can reduce the closing inrush current of the capacitor C to about 2.1 times of rated current, has the conducting precision of us level, and effectively solves the influence of the closing inrush current on the operation of a power grid and equipment.
Drawings
Fig. 1 is an electrical schematic of the present invention.
Detailed Description
As shown in fig. 1, a shunt capacitor micro-inrush current auxiliary switching-on system comprises a spark gap GPA for assisting the switching-on of a circuit breaker K, a transformer T for transmitting a system voltage signal to a controller ZK, and the controller ZK; the wire inlet end of the spark gap GPA is connected with the wire inlet end of the circuit breaker K, the wire outlet end of the spark gap GPA is connected with the wire outlet end of the circuit breaker K, the trigger electrode of the spark gap GPA is connected with the first output end A end of the controller ZK, and the cathode of the spark gap GPA is connected with the second output end B end of the controller ZK; the input end of the transformer T is connected with the wire inlet end of the spark gap GPA, and the output end of the transformer T is connected with the input end C end of the controller ZK; after receiving a switching-on command of the breaker K, the controller ZK controls the spark gap GPA to be conducted in a time-sharing and phase-splitting mode.
As shown in fig. 1, the wire inlet end of the circuit breaker K is connected in parallel with a power transmission line in a power grid, the wire outlet end of the circuit breaker K is connected with the wire inlet end of the capacitor C, the wire outlet end of the capacitor C is grounded, and the circuit breaker K and the capacitor C together form a parallel compensation device 1. The parallel compensation device 1 is an existing reactive compensation device in a power grid and comprises a circuit breaker K for controlling the switching of a capacitor C and the capacitor C for providing reactive compensation, wherein the capacitor C has two connection methods of Y type and delta type.
The working principle of the invention is as follows: after receiving a closing command of a breaker K in the parallel compensation device 1, the controller ZK controls the spark gap GPA to be conducted before the contact of the breaker K in the parallel compensation device 1 is not closed and pre-discharge through time-sharing split phase, so that the influence of capacitor closing inrush current on the operation of a power grid and equipment is effectively solved.
In summary, the parallel compensation device 1 has the advantages of simple structure, safety, reliability and the like, the circuit breaker contacts are not closed in the parallel compensation device 1 and are conducted before pre-discharge, the closing inrush current of the capacitor C can be reduced to about 2.1 times of rated current, the conduction precision is in the us level, and the influence of the closing inrush current on the operation of a power grid and equipment is effectively solved.
Claims (2)
1. The utility model provides a shunt capacitor micro-surge current auxiliary closing system which characterized in that: the device comprises a spark gap GPA for assisting the closing of a circuit breaker K, a transformer T for transmitting a system voltage signal to a controller ZK and the controller ZK; the wire inlet end of the spark gap GPA is connected with the wire inlet end of the circuit breaker K, the wire outlet end of the spark gap GPA is connected with the wire outlet end of the circuit breaker K, the trigger electrode of the spark gap GPA is connected with the first output end A end of the controller ZK, and the cathode of the spark gap GPA is connected with the second output end B end of the controller ZK; the input end of the transformer T is connected with the wire inlet end of the spark gap GPA, and the output end of the transformer T is connected with the input end C end of the controller ZK; after receiving a closing command of the circuit breaker K, the controller ZK controls the spark gap GPA to be conducted before the contact of the circuit breaker K is not closed and pre-discharge through time-sharing split phase;
the wire inlet end of the circuit breaker K is connected with a power transmission line in a power grid in parallel, the wire outlet end of the circuit breaker K is connected with the wire inlet end of the capacitor C, the wire outlet end of the capacitor C is grounded, and the circuit breaker K and the capacitor C jointly form a parallel compensation device (1).
2. The shunt capacitor micro-inrush current auxiliary closing system of claim 1, wherein: the parallel compensation device (1) is an existing reactive compensation device in a power grid and comprises a breaker K for controlling the switching of a capacitor C and the capacitor C for providing reactive compensation, wherein the capacitor C has two connection methods of Y type and delta type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810422267.8A CN108493954B (en) | 2018-05-04 | 2018-05-04 | Micro-inrush current auxiliary closing system for parallel capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810422267.8A CN108493954B (en) | 2018-05-04 | 2018-05-04 | Micro-inrush current auxiliary closing system for parallel capacitor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108493954A CN108493954A (en) | 2018-09-04 |
| CN108493954B true CN108493954B (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810422267.8A Active CN108493954B (en) | 2018-05-04 | 2018-05-04 | Micro-inrush current auxiliary closing system for parallel capacitor |
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| CN (1) | CN108493954B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994551A (en) * | 2019-11-26 | 2020-04-10 | 国网宁夏电力有限公司电力科学研究院 | Excitation inrush current suppression device and method for transformer |
| CN111541230B (en) * | 2020-04-20 | 2022-04-19 | 国网新疆电力有限公司塔城供电公司 | Inrush current overvoltage treatment device and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201656456U (en) * | 2010-03-12 | 2010-11-24 | 华东电力试验研究院有限公司 | Supergrid short-circuit current limiting device |
| CN103746385A (en) * | 2013-12-18 | 2014-04-23 | 国网河南省电力公司平顶山供电公司 | Series-connected capacitor compensation device and method used for power distribution network |
| CN104242136A (en) * | 2014-09-09 | 2014-12-24 | 李品德 | Power distribution device set with inrush current inhibition function and control method of power distribution device set |
| CN206807013U (en) * | 2017-02-17 | 2017-12-26 | 天津富瑞福莱科技发展有限公司 | A kind of electric capacitor no-flashy-flow switching circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009012114B4 (en) * | 2009-03-06 | 2016-04-21 | Maschinenfabrik Reinhausen Gmbh | Controlled cut-off spark gap and electrical system with a controlled cut-off spark gap |
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2018
- 2018-05-04 CN CN201810422267.8A patent/CN108493954B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201656456U (en) * | 2010-03-12 | 2010-11-24 | 华东电力试验研究院有限公司 | Supergrid short-circuit current limiting device |
| CN103746385A (en) * | 2013-12-18 | 2014-04-23 | 国网河南省电力公司平顶山供电公司 | Series-connected capacitor compensation device and method used for power distribution network |
| CN104242136A (en) * | 2014-09-09 | 2014-12-24 | 李品德 | Power distribution device set with inrush current inhibition function and control method of power distribution device set |
| CN206807013U (en) * | 2017-02-17 | 2017-12-26 | 天津富瑞福莱科技发展有限公司 | A kind of electric capacitor no-flashy-flow switching circuit |
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| Publication number | Publication date |
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| CN108493954A (en) | 2018-09-04 |
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