CN101552466B - An arc-suppression coil grounding device for medium voltage network - Google Patents
An arc-suppression coil grounding device for medium voltage network Download PDFInfo
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- CN101552466B CN101552466B CN2009101034038A CN200910103403A CN101552466B CN 101552466 B CN101552466 B CN 101552466B CN 2009101034038 A CN2009101034038 A CN 2009101034038A CN 200910103403 A CN200910103403 A CN 200910103403A CN 101552466 B CN101552466 B CN 101552466B
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Abstract
The invention relates to an arc-suppression coil grounding device for medium voltage network, which principally includes a non-adjustable arc suppression coil (1), a single-phase high-voltage switch (2), an active dynamic idle work and harmonic compensation means (3), and a controller (6), wherein, the non-adjustable arc-suppression coil (1) is connected in series with the single-phase high-voltage switch (2) and is connected between the system neutral point and earth, the active dynamic idle work and harmonic compensation means (3) is also connected between the system neutral point and earth.The controller (6) is used to determine single-phase ground fault, and detect the fault capacitive current, for controlling the single-phase high-voltage switch (2) and the active dynamic idle work a nd harmonic compensation means (3). The device is matched with the active dynamic idle work and harmonic compensation means through the non-adjustable arc suppression coil (1), and can accurately compensate the single-phase ground capacity current.
Description
Technical field
The present invention relates to a kind of grounding through arc device that is used for medium voltage network.
Background technology
Medium voltage network is widely used from the motion tracking grounding through arc at present, maximum is turn-adjusting, and its adopts classification switching, can not the fine compensation unbalanced earth fault capacitance current, particularly the high frequency capacitance electric current can not be compensated, still the arc grounding overvoltage might be produced when therefore single-phase earthing taking place.For automatic turn-adjusting arc suppression coil, in order as far as possible accurately to compensate unbalanced earth fault capacitance current, can increase the on load tap changer gear or increase electronics fling-cut switch quantity, above method can partly be improved the shortcoming of traditional arc suppression coil, but the complexity and the unreliability of system have been increased, simultaneously because the long-term connecting system of arc suppression coil, the loss when having increased normal operation; In addition tradition take off humorous degree from the motion tracking arc suppression coil can not be too high, the neutral point unbalance voltage when therefore having strengthened normal operation.
Summary of the invention
The objective of the invention is to propose a kind of can fine compensation single phase ground fault capacitance current, loss is little, the neutral point grounding through arc device that do not enlarge the neutral point unbalance voltage.
For reaching the above object, the present invention adopts following technical scheme:
A kind of grounding through arc device that is used for medium voltage network comprises:
Nonadjustable arc suppression coil, single-phase high voltage switch are serially connected between electric power system neutral point and the ground, are used for preliminary bucking-out system capacitance current; Active dynamic reactive and harmonic compensation device are connected between electric power system neutral point and the ground, are used for dynamic bucking-out system capacitance current; Controller is used to differentiate single phase ground fault and detection failure capacitance current, and single-phase high voltage switch and active dynamic reactive and harmonic compensation device are controlled.Described active dynamic reactive and harmonic compensation device are chain static synchronous compensator.
As improvement of the present invention: be in series with impedance between described neutral point and active dynamic reactive and the harmonic compensation device.
In order to make the better fine compensation single phase ground fault of controller capacitance current, be serially connected with current transformer between described neutral point and active dynamic reactive and the harmonic compensation device, the output signal of described current transformer is imported described controller.
The invention has the beneficial effects as follows:
(1) matches with active dynamic reactive and harmonic compensation device by nonadjustable arc suppression coil, make the present invention can compensate unbalanced earth fault capacitance current accurately, after earth fault disappears, the single-phase high voltage switch disconnects arc suppression coil, whole arc suppression coil system is all out of service, be equivalent to isolated neutral system, reduced the loss of system.Can not produce simultaneously conventional from the motion tracking arc suppression coil owing to taking off the not high disadvantage of amplifying the neutral point unbalance voltage of humorous degree.
(2) be in series with impedance between neutral point and active dynamic reactive and the harmonic compensation device, the purpose that can reach energy snubber and reduce to disturb.
(3) be serially connected with current transformer between neutral point and active dynamic reactive and the harmonic compensation device, the output signal of described current transformer is imported described controller, and controller can carry out the accurate more compensation that detects to the single phase ground fault capacitance current by controlling active dynamic reactive and harmonic compensation device like this.
Description of drawings
Fig. 1 is a structure chart of the present invention.
Among the figure: part 1 is an arc suppression coil, and part 2 is the single-phase high voltage switch, and part 3 is active dynamic reactive and harmonic compensation device, and part 4 is impedance, and part 5 is a current transformer, and part 6 is a controller.
Embodiment
The present invention will be further described below in conjunction with accompanying drawing:
A kind of grounding through arc device that is used for medium voltage network comprises:
Nonadjustable arc suppression coil 1, single-phase high voltage switch 2 are used for preliminary bucking-out system capacitance current, are serially connected between electric power system neutral point and the ground; Active dynamic reactive and harmonic compensation device 3 are used for dynamic bucking-out system capacitance current (comprising the high frequency capacitance electric current), are connected between electric power system neutral point and the ground; Controller 6 is differentiated single phase ground fault and fault capacitance current by the residual voltage and each the distribution loop zero sequence capacitance current that detect input, and single-phase high voltage switch 2 and active dynamic reactive and harmonic compensation device 3 are controlled.
Active dynamic reactive and harmonic compensation device 3 have the gamut fan-out capability idle from specified capacitive reactive power to specified perception, nonadjustable arc suppression coil 1 capacity can be made as 2/3 of system's desired volume, the capacity of active dynamic reactive and harmonic compensation device 3 is made as 1/3 of system's desired volume.Can certainly make active dynamic reactive and harmonic compensation device 3 match according to other ratio, satisfy the needs of system with nonadjustable arc suppression coil 1.By to the switching of nonadjustable arc suppression coil 1 and cooperating of chain static synchronous compensator, can obtain 0 ~ 100% perceptual idle output.Described active dynamic reactive and harmonic compensation device 3 are chain static synchronous compensator.Can not self-regulating arc suppression coil when described nonadjustable arc suppression coil 1 is meant and moves in system, actual can be in system's taps (being that no-load is switched) that the back switches of stopping transport according to several grades of the development plan of system designs, system enlarges and original compensation capacity when not enough like this, can increase compensation capacity by the link unit that switches tap and increase chain static synchronous compensator, can reduce the investment that System Expansion is transformed so greatly.Be in series with impedance between described neutral point and active dynamic reactive and the harmonic compensation device 3, can reach energy snubber like this and reduce the effect of disturbing.Described neutral point and adjustable active dynamic reactive and harmonic compensation device 3 are serially connected with current transformer 5, the output signal of described current transformer 5 is imported described controller 6, and controller 6 can compensate more accurately to the single phase ground fault capacitance current like this.Described single-phase high voltage switch 2 can be single-phase high voltage vacuum contactor or single-phase high voltage vacuum circuit-breaker, can certainly adopt the single-phase high voltage switch of other types, and this all drops within protection scope of the present invention.
Claims (10)
1. grounding through arc device that is used for medium voltage network, it is characterized in that: described grounding through arc device comprises:
Be serially connected in nonadjustable arc suppression coil (1) and single-phase high voltage switch (2) between electric power system neutral point and the ground, be used for preliminary bucking-out system capacitance current;
Be serially connected in active dynamic reactive and harmonic compensation device (3) between electric power system neutral point and the ground, be used for dynamic bucking-out system capacitance current;
Controller (6) is used to differentiate single phase ground fault, and the detection failure capacitance current is controlled single-phase high voltage switch (2) and active dynamic reactive and harmonic compensation device (3).
2. the grounding through arc device that is used for medium voltage network according to claim 1 is characterized in that: be in series with impedance (4) between described neutral point and active dynamic reactive and the harmonic compensation device (3).
3. the grounding through arc device that is used for medium voltage network according to claim 1 and 2, it is characterized in that: be serially connected with current transformer (5) between described neutral point and active dynamic reactive and the harmonic compensation device (3), the output signal of described current transformer (5) is imported described controller (6).
4. the grounding through arc device that is used for medium voltage network according to claim 1 and 2 is characterized in that: described active dynamic reactive and harmonic compensation device (3) are chain static synchronous compensator.
5. the grounding through arc device that is used for medium voltage network according to claim 3 is characterized in that: described active dynamic reactive and harmonic compensation device (3) are chain static synchronous compensator.
6. the grounding through arc device that is used for medium voltage network according to claim 1 and 2, it is characterized in that: described nonadjustable arc suppression coil (1) capacity is 2/3 of system's desired volume, and the capacity of described active dynamic reactive and harmonic compensation device (3) is 1/3 of system's desired volume.
7. the grounding through arc device that is used for medium voltage network according to claim 3, it is characterized in that: described nonadjustable arc suppression coil (1) capacity is 2/3 of system's desired volume, and the capacity of described active dynamic reactive and harmonic compensation device (3) is 1/3 of system's desired volume.
8. the grounding through arc device that is used for medium voltage network according to claim 1 and 2 is characterized in that: described single-phase high voltage switch (2) is the single-phase high voltage vacuum contactor.
9. the grounding through arc device that is used for medium voltage network according to claim 3 is characterized in that: described single-phase high voltage switch (2) is the single-phase high voltage vacuum contactor.
10. according to the arbitrary described grounding through arc device that is used for medium voltage network of claim 1 to 2, it is characterized in that: described single-phase high voltage switch (2) is the single-phase high voltage vacuum circuit-breaker.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101034038A CN101552466B (en) | 2009-03-18 | 2009-03-18 | An arc-suppression coil grounding device for medium voltage network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101034038A CN101552466B (en) | 2009-03-18 | 2009-03-18 | An arc-suppression coil grounding device for medium voltage network |
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| CN101552466A CN101552466A (en) | 2009-10-07 |
| CN101552466B true CN101552466B (en) | 2011-05-18 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103441501B (en) * | 2013-08-30 | 2015-07-22 | 株洲变流技术国家工程研究中心有限公司 | Method for achieving arc suppression coil function by using high-voltage cascading type SVG |
| CN106602540A (en) * | 2016-12-06 | 2017-04-26 | 国网山东省电力公司莱芜供电公司 | Active voltage arc-extinction method applicable to single-phase earth fault of medium voltage distribution network |
| CN108982960B (en) * | 2018-08-13 | 2019-11-08 | 西安科技大学 | A kind of capacitance current of distribution network measurement method and device |
| CN109873413B (en) * | 2019-04-02 | 2020-04-24 | 云南电网有限责任公司电力科学研究院 | Method for completely compensating grounding current by matching controllable current source with arc suppression coil |
| CN109950886B (en) * | 2019-04-02 | 2020-04-24 | 云南电网有限责任公司电力科学研究院 | Control method for controllable current source grounding full compensation with inductance compensation |
| CN109768538B (en) * | 2019-04-02 | 2020-02-07 | 云南电网有限责任公司电力科学研究院 | Full compensation method and circuit for grounding of parallel controllable current source of arc suppression coil |
| CN110112752A (en) * | 2019-06-14 | 2019-08-09 | 河北旭辉电气股份有限公司 | A kind of dynamic reactive and extinguishing arc comprehensive compensation method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201004554Y (en) * | 2007-01-26 | 2008-01-09 | 保定博为科技有限公司 | Automatic tracking grounding compensation device control for capacitance adjusting arc extinguishment coil |
| CN101212138A (en) * | 2006-12-25 | 2008-07-02 | 万达集团股份有限公司 | Capacitance-adjustable automatic compensating arc extinguishing coil |
| CN201204451Y (en) * | 2008-07-01 | 2009-03-04 | 乐山一拉得电网自动化有限公司 | Intelligent arc-suppression coil plant |
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2009
- 2009-03-18 CN CN2009101034038A patent/CN101552466B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101212138A (en) * | 2006-12-25 | 2008-07-02 | 万达集团股份有限公司 | Capacitance-adjustable automatic compensating arc extinguishing coil |
| CN201004554Y (en) * | 2007-01-26 | 2008-01-09 | 保定博为科技有限公司 | Automatic tracking grounding compensation device control for capacitance adjusting arc extinguishment coil |
| CN201204451Y (en) * | 2008-07-01 | 2009-03-04 | 乐山一拉得电网自动化有限公司 | Intelligent arc-suppression coil plant |
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