CN102969695A - Grounding forecasting method in neutral-point low-resistance grounding mode - Google Patents
Grounding forecasting method in neutral-point low-resistance grounding mode Download PDFInfo
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- CN102969695A CN102969695A CN2012104176494A CN201210417649A CN102969695A CN 102969695 A CN102969695 A CN 102969695A CN 2012104176494 A CN2012104176494 A CN 2012104176494A CN 201210417649 A CN201210417649 A CN 201210417649A CN 102969695 A CN102969695 A CN 102969695A
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Abstract
The invention discloses a grounding forecasting method in a neutral-point low-resistance grounding mode. In a transformer neutral point grounding through a low resistor Ro mode, one phase is grounded to form a single-phase short circuit. A distribution automation system provided with a zero-sequence over-current protection module and a grounding forecasting module is installed on a distribution line. When a total zero-sequence current reaches a primary current setting value of zero-sequence over-current protection, the zero-sequence over-current protection module acts, and a grounding current is cut off; and when the total zero-sequence current generated in the line reaches a grounding forecasting primary setting current range value Io.yg, the grounding forecasting module acts and emits grounding forecasting signals. Switches in the line are provided with monitor terminals, the monitor terminals monitor the switches through which zero-sequence currents flow and the switches through which the zero-sequence currents do not flow and transmit information to the distribution automation system, and accordingly, grounding areas can be determined. According to the grounding forecasting method, grounding forecasts can be detected before the action of the zero-sequence over-current protection module, grounding faults are eliminated, and outlet switch tripping due to the action of the zero-sequence over-current protection module caused by fault expanding is prevented.
Description
Technical field
Ground connection advance notice method when the present invention relates to the Neutral Point Through Low Resistance mode in the 10KV underground cable system.
Background technology
Urban distribution network is to eliminate earth fault behind a large amount of use underground cables, adopts transformer neutral point to solve through the low resistance grounding mode.But form single-phase short circuit during a phase ground connection, and wire capacitance current is over the ground arranged, the electric current of this moment reaches hundreds of to thousands of peaces, therefore will install the zero sequence excess current protection, makes the outlet switch tripping operation, cuts off earth short circuit current.According to the technical journal " for electricity consumption " that urban electricity supply Professional Committee of CSEE sponsors, the 3rd phase in 1997, king's one word work " Urban Distribution Network Neutral Grounding lecture "; " for electricity consumption ", the 1st phase in 2000, Xue Jin, Chen Qinsheng work " to the introduction of France, Germany and Britain's part electrical network investigation ", all point out: cable system adopts the ring network power supply mode, is equipped with automation equipment, improves power supply reliability.In addition, the domestic power distribution automation that embarked is namely installed block switch on the line, and circuit is divided into several sections.Each switch is installed monitor terminal, can detect zero-sequence current with three current transformer zero sequence pass filter wiring or with zero sequence current mutual inductor.Switch ends is equipped with threephase potential transformer, is used for measuring voltage and the used storage battery of switch charged.Cable electric capacity over the ground is distributed, represents with lumped capacitance.Transformer station's installing electrical power distribution automatization system is realized the power distribution automation function.Therefore; in order to improve power supply reliability; except realizing power distribution automation, guaranteeing the zero sequence excess current protection correct operation; should not detect the ground connection advance notice before the action in the zero sequence excess current protection; eliminate earth fault; prevent that earth fault from enlarging, cause zero sequence excess current protection action to make the outlet switch tripping operation.
Summary of the invention
The present invention is directed to existing shortcoming and propose, provide a kind of and can before earth fault current reach zero sequence excess current protection action, not send the ground connection anticipating signal, thus the ground connection advance notice method during the Neutral Point Through Low Resistance mode of advanced processing earth fault.
It is as follows that the present invention solves the problems of the technologies described above the technical scheme that adopts:
Ground connection advance notice method during a kind of Neutral Point Through Low Resistance mode, in the 10KV underground cable system, transformer neutral point is through small resistor R
oDuring earthing mode; one forms single-phase short circuit with joining; wherein: be equiped with electrical power distribution automatization system on the circuit; has respectively zero sequence excess current protection module and ground connection advance notice module on the monitor terminal of described electrical power distribution automatization system; if during certain phase ground connection; Earth Phase produces short circuit current, and two-phase is load current in addition, and three-phase current unbalance produces zero-sequence current I
o, each switch produces capacitance current over the ground simultaneously, and system is the total capacitance electric current I over the ground
C, two kinds of electric currents mix the total zero-sequence current of generation
When the total zero-sequence current that produces in the circuit reaches zero sequence excess current protection primary current setting value, zero sequence excess current protection action, thus the outlet switch of ground path is tripped, cut off earth current; The total zero-sequence current that produces in circuit reaches a setting current value range of ground connection advance notice JDYG I
OygThe time, the ground connection anticipating signal is sent in ground connection advance notice action, and wherein, each switch all is equipped with monitor terminal in the circuit, and described monitor terminal is measured total zero-sequence current I
The O ∑And the monitoring switch that flows through of zero-sequence current and the switch that do not flow through, information is sent to described electrical power distribution automatization system, know the ground connection section thereby declare.
1, a phase ground connection single-phase short circuit, single-phase short circuit current
Two-phase is load current in addition, and three-phase current unbalance produces zero-sequence current I
oAnd each switch has capacitance current, the total capacitance electric current I over the ground during a phase ground connection
CThese two kinds of electric currents mix, and form total zero-sequence current
I
The O ∑Can reach hundreds of to thousands of peaces.I
The O ∑The switch that flows through and the switch that does not flow through are sent to electrical power distribution automatization system with information, know the ground connection section thereby can declare.
2, relay coordination:
Total zero-sequence current I
The O ∑Flow through the zero sequence excess current protection, if I
The O ∑〉=I
Odz(I
OdzSetting current for the zero sequence excess current protection), zero sequence excess current protection action this moment.But during on-the-spot the use, the relay coordination electric current does not generally calculate, but according to the rules requirement, small resistor can be worked two hours by 90A.Therefore, making setting current of zero sequence excess current protection is 90A, the 0.6S tripping operation.
3, ground connection advance notice:
During ground connection often with a transition resistance R
GdIf, R
GdReach certain value, make I
The O ∑〉=I
OdzThereby, make zero sequence excess current protection action, make the outlet switch tripping operation.If R
GdLarge again, make I
The O ∑＜I
Odz, zero sequence excess current protection is failure to actuate, but this moment ground connection.Therefore, ground connection advance notice setting current once is 30A, like this ground connection advance notice setting current I
Oyg: 30A＜I
Oyg＜90A will send out the ground connection anticipating signal in this scope, at this moment I
The O ∑Be I
OygI
OygThe switch that flows through and the switch that does not flow through are sent to electrical power distribution automatization system with information, thereby determine the ground connection section.
Beneficial effect of the present invention is as follows:
The present invention is after having taked technique scheme, and Neutral Point Through Low Resistance ground connection occurs mutually such as one, and a zero-sequence current is ground connection advance notice setting current I
Oyg, when reaching following numerical value 30A＜I
OygDuring＜90A, send out the ground connection anticipating signal, and inform * * circuit * * section ground connection.After connecing this signal, promptly process earth fault, Accident prevention enlarges, thereby the zero sequence excess current protection is failure to actuate, and does not trip.
Description of drawings
Below in conjunction with accompanying drawing the present invention is described in detail, so that above-mentioned advantage of the present invention is clearer and more definite.
The circuit diagram of the ground connection advance notice method when Fig. 1 is Neutral Point Through Low Resistance mode of the present invention.
Embodiment
Present invention is described below in conjunction with the drawings and specific embodiments.
1, the ground connection advance notice method during a kind of Neutral Point Through Low Resistance mode, wherein: in the 10KV underground cable system, transformer neutral point is through small resistor R
oDuring earthing mode; one forms single-phase short circuit with joining; short circuit current can reach hundreds of to thousands of amperes, therefore will install the zero sequence excess current protection, the 0.6s action; thereby make the outlet switch 1CK tripping operation of ground path 1; cut off earth current, if A phase ground connection, Earth Phase produces short circuit current; two-phase load current in addition, three-phase current unbalance produces zero-sequence current I
o, each switch produces capacitance current over the ground simultaneously, as: I
01～I
03, I
01.1～I
01.3, I
02.1～I
02.3, I
03.1～I
03.3, I
01.L～I
03.L, system is the total capacitance electric current I over the ground
C, two kinds of electric currents mix the total zero-sequence current of generation
During ground connection often with transition resistance R
Gd, transition resistance changes directly affects I
The O ∑Size, general zero sequence excess current protection primary current setting value is 90A, and setting current I of ground connection advance notice JDYG
OygFor: 30A＜I
Oyg＜90A is along with R
GdVariation I
OygBe I
The O ∑Also change thereupon, but meet I
OygSetting range namely send out ground connection advance notice, each switch all is equipped with monitor terminal, and is connected into the wiring of zero sequence pass filter with three current transformers, or uses zero sequence current mutual inductor, measurement zero-sequence current I
OAnd capacitive earth current I
CI
The O ∑Flow through ground path outlet switch 1CK, flow through block switch 1FK
1, 1FK
2, but do not flow through block switch 1FK
3Interconnection switch 1LL is sent to electrical power distribution automatization system DA with information, can judge: the advance notice of circuit 1 the 3rd section A phase ground connection.
Total zero-sequence current I during ground connection
The O ∑＜90A and＞30A, do not make zero sequence excess current protection action tripping operation, ground connection advance notice this moment J DYG reports to the police, 90A can protect actual setting value to change according to zero sequence excess current, the numerical value of＞30A can change as required.
The ground connection advance notice both can be used in the electrical power distribution automatization system, can be used for again among the common 10KV and 35KV system without power distribution automation.
Described monitor terminal is to adopt three current transformers to be connected into the wiring of zero sequence pass filter, or adopts zero sequence current mutual inductor.
The circuit diagram of the ground connection advance notice method when particularly, Fig. 1 is Neutral Point Through Low Resistance mode of the present invention.Among Fig. 1, B is main transformer, and O is neutral point, R
OBe the neutral point small resistor, 1～3CK is the outlet switch of transformer station's circuit 1～3,1～3FK
1-3Be the block switch (cable is ring main unit) on the circuit, 1～3LL is the interconnection switch on the circuit, and DA is electrical power distribution automatization system, and JDYG is the ground connection advance notice, I
01～I
03, I
01.1～I
01.3, I
02.1～I
02.3, I
03.1～I
03.3, I
01.L～I
03.LCapacitive earth current when being outlet switch, block switch and interconnection switch one phase ground connection, K is a phase earth point, R
GdTransition resistance when being ground connection, I
CTotal capacitance electric current when being system earth, I
OThe zero-sequence current that produces when being three-phase current unbalance,
It is total zero-sequence current.
Provide embodiments of the invention below in conjunction with accompanying drawing:
If circuit 1 single-phase earthing point is K in the accompanying drawing, this moment circuit A phase ground short circuit, short circuit current
, two-phase is load current in addition, three-phase current unbalance produces zero-sequence current I
oEach switch has capacitance current over the ground during one phase ground connection, such as I in the accompanying drawing
01～I
03, I
01.1～I
01.3, I
02.1～I
02.3, I
03.1～I
03.3, I
01.L～I
03. L, system's total capacitance electric current I
CThese two kinds of electric currents mix, and form total zero-sequence current
Since during ground connection often with a transition resistance R
Gd, work as R
GdWhen reaching certain value, zero sequence excess current protection is failure to actuate and has sent the ground connection anticipating signal.This moment I
The O ∑Be ground connection advance notice JDYG setting current value I
Oyg, I
OygAdjust at 30A＜I
Oyg＜90A works as I
OygSend out the ground connection anticipating signal during＞30A, work as I
OygStill send out the ground connection anticipating signal during＜90A, but the zero sequence excess current protection is failure to actuate.I
OygCan arrange as required, 30A can change as required, and 90A can protect actual setting value to decide according to zero sequence excess current.I
The O ∑Flow through 1CK, flow through block switch 1FK
1, 1FK
2, but do not flow through block switch 1FK
3. interconnection switch 1LL, the monitor terminal of switch is sent to electrical power distribution automatization system DA with information, can judge: the advance notice of circuit 1 the 3rd section A phase ground connection.
But the above only is better possible embodiments of the present invention, is not to limit to claim of the present invention, thus the equivalent structure that all utilizations specification of the present invention and accompanying drawing content are done variation, all in like manner within the scope of the present invention.
Claims (5)
1. the ground connection advance notice method during a Neutral Point Through Low Resistance mode, in the 10KV underground cable system, transformer neutral point is through small resistor R
oDuring earthing mode; one forms single-phase short circuit with joining; it is characterized in that: be equiped with electrical power distribution automatization system on the circuit; has respectively zero sequence excess current protection module and ground connection advance notice module on the monitor terminal of described electrical power distribution automatization system; if during certain phase ground connection; Earth Phase produces short circuit current, and two-phase is load current in addition, and three-phase current unbalance produces zero-sequence current I
o, each switch produces capacitance current over the ground simultaneously, and system is the total capacitance electric current I over the ground
C, two kinds of electric currents mix the total zero-sequence current of generation
When the total zero-sequence current that produces in the circuit reaches zero sequence excess current protection primary current setting value, zero sequence excess current protection action, thus the outlet switch of ground path is tripped, cut off earth current; The total zero-sequence current that produces in circuit reaches a setting current value range of ground connection advance notice JDYG I
OygThe time, the ground connection anticipating signal is sent in ground connection advance notice action, and wherein, each switch all is equipped with monitor terminal in the circuit, and described monitor terminal is measured total zero-sequence current I
The O ∑And the monitoring switch that flows through of zero-sequence current and the switch that do not flow through, information is sent to described electrical power distribution automatization system, know the ground connection section thereby declare.
2. the ground connection advance notice method during Neutral Point Through Low Resistance mode according to claim 1, it is characterized in that: setting zero sequence excess current protection primary current setting value is 90A, and setting current I of ground connection advance notice JDYG
OygFor: I
Oyg＜90A, total zero-sequence current I when ground connection
The O ∑During＜90A, do not make zero sequence excess current protection action tripping operation, ground connection advance notice this moment JDYG reports to the police.
3. the ground connection advance notice method during Neutral Point Through Low Resistance mode according to claim 2 is characterized in that: set setting current I of ground connection advance notice JDYG
OygFor: 30A＜I
Oyg＜90A, total zero-sequence current I when ground connection
The O ∑＞30A and＜during 90A, beginning ground connection advance notice JDYG reports to the police.
4. the ground connection advance notice method during Neutral Point Through Low Resistance mode according to claim 1, it is characterized in that: the ground connection advance notice both can be used in the electrical power distribution automatization system, can be used for again among the common 10KV and 35KV system without power distribution automation.
5. the ground connection advance notice method during Neutral Point Through Low Resistance mode according to claim 1, it is characterized in that: described monitor terminal is to adopt three current transformers to be connected into the wiring of zero sequence pass filter, or adopts zero sequence current mutual inductor.
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| CN201210417649.4A CN102969695B (en) | 2012-10-26 | 2012-10-26 | Grounding forecasting method in neutral-point low-resistance grounding mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210417649.4A CN102969695B (en) | 2012-10-26 | 2012-10-26 | Grounding forecasting method in neutral-point low-resistance grounding mode |
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| CN102969695B CN102969695B (en) | 2014-12-17 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944156A (en) * | 2014-04-16 | 2014-07-23 | 江苏汉天星配电自动化科技有限公司 | Grounding forecasting method of arc suppression coil grounding mode |
| CN103941157A (en) * | 2014-04-16 | 2014-07-23 | 江苏汉天星配电自动化科技有限公司 | Grounding circuit and section locating method of small current grounding system |
| CN107192919A (en) * | 2017-06-20 | 2017-09-22 | 国网江苏省电力公司无锡供电公司 | A kind of power distribution network feedback of earthing mode self-identifying supplies line protective devices and method |
| CN109921405A (en) * | 2019-04-24 | 2019-06-21 | 南京泰润电力工程有限公司 | A kind of earthing method of medium voltage network neutral point |
| CN112787318A (en) * | 2019-11-25 | 2021-05-11 | 中国石油大学(华东) | Setting method for stage type zero sequence overcurrent protection of small resistance grounding system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172891A (en) * | 1991-12-20 | 1993-07-13 | Toyo Commun Equip Co Ltd | Detection of grounding of electric line and device therefor |
| CN101534001A (en) * | 2008-03-11 | 2009-09-16 | 杨万钟 | Method for detecting distribution network short circuit fault and restoring power supply in non-broken-down section |
| CN102279349A (en) * | 2011-07-13 | 2011-12-14 | 国网电力科学研究院 | Low current grounding wire selection method based on residual current variable |
-
2012
- 2012-10-26 CN CN201210417649.4A patent/CN102969695B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05172891A (en) * | 1991-12-20 | 1993-07-13 | Toyo Commun Equip Co Ltd | Detection of grounding of electric line and device therefor |
| CN101534001A (en) * | 2008-03-11 | 2009-09-16 | 杨万钟 | Method for detecting distribution network short circuit fault and restoring power supply in non-broken-down section |
| CN102279349A (en) * | 2011-07-13 | 2011-12-14 | 国网电力科学研究院 | Low current grounding wire selection method based on residual current variable |
Non-Patent Citations (2)
| Title |
|---|
| 张振旗: "10KV中性点小电阻接地系统零序电流保护整定值探讨", 《供用电》 * |
| 张春合等: "小电阻接地系统给继电保护带来的新问题", 《供用电》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944156A (en) * | 2014-04-16 | 2014-07-23 | 江苏汉天星配电自动化科技有限公司 | Grounding forecasting method of arc suppression coil grounding mode |
| CN103941157A (en) * | 2014-04-16 | 2014-07-23 | 江苏汉天星配电自动化科技有限公司 | Grounding circuit and section locating method of small current grounding system |
| CN107192919A (en) * | 2017-06-20 | 2017-09-22 | 国网江苏省电力公司无锡供电公司 | A kind of power distribution network feedback of earthing mode self-identifying supplies line protective devices and method |
| CN109921405A (en) * | 2019-04-24 | 2019-06-21 | 南京泰润电力工程有限公司 | A kind of earthing method of medium voltage network neutral point |
| CN112787318A (en) * | 2019-11-25 | 2021-05-11 | 中国石油大学(华东) | Setting method for stage type zero sequence overcurrent protection of small resistance grounding system |
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| CN102969695B (en) | 2014-12-17 |
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