CN105162090B - It is classified controllable high-voltage shunt reactor guard method - Google Patents
It is classified controllable high-voltage shunt reactor guard method Download PDFInfo
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- CN105162090B CN105162090B CN201510417024.1A CN201510417024A CN105162090B CN 105162090 B CN105162090 B CN 105162090B CN 201510417024 A CN201510417024 A CN 201510417024A CN 105162090 B CN105162090 B CN 105162090B
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Abstract
Controllable high-voltage shunt reactor guard method is classified the invention discloses one kind, the current sequence components amplitude com parison of excessively controllable high anti-middle each side of transformer comes the position of failure judgement generation.If the phasor difference of certain side forward-order current and negative-sequence current is less than the phasor difference of forward-order current reverse vector and negative-sequence current, illustrate that the load side in the side occurs for failure；If the phasor difference of certain side forward-order current and negative-sequence current is more than the phasor difference of forward-order current reverse vector and negative-sequence current, illustrate that the power end in the side occurs for failure.Whether failure, which occurs in inside transformer, is determined to the judgement of abort situation with reference to both sides electric current；Current sequence components pilot protection of the present invention carries out positioning analysis by failure occurring position, and without carrying out quantitative analysis to fault current, greatly improves protection sensitivity.When calculate analysis to criterion, offside electric current is not related to, is not influenceed by CT Transfer characteristic differences.
Description
Technical field
Relay Protection Technology in Power System field of the present invention, to the earth fault of high-leakage impedance transformer in reactor, alternate
Failure, turn-to-turn fault have higher protection sensitivity, more particularly to a kind of classification controllable high-voltage shunt reactor guard method.
Background technology
Controllable high-voltage shunt reactor is classified in high pressure long range transmission line, suppresses power-frequency overvoltage, compensated line
Capacity current, has given play to superior function.Controlled reactor is made up of the transformer belt load reactance device of high leakage reactance.Transported according to circuit
Row operating mode, high anti-reactive capability is adjusted by adjusting load reactance, circuit is operated in stable state.
Be classified controllable high-voltage shunt reactor general split-phase arrangement, it may occur however that singlephase earth fault, turn-to-turn fault and
The phase fault of low probability.Reactor configures big differential protection and is used as high-leakage impedance transformer source side winding and controling winding
Main protection, big differential protection use magnetic balance principle, utilize source side winding electric current and controling winding side winding current phasor difference
To differentiate whether transformer breaks down.Under the transformer short-circuit method of operation, influenceed by the high leakage reactance characteristic of transformer, transformer control
Winding processed breaks down, especially high resistance earthing fault and during small turn-to-turn fault, and fault current change is smaller, and and rated current
Close, because big differential protection definite value needs to hide difference stream caused by the CT progress of disease errors of both sides, sensitivity is very low, is unsatisfactory for requiring,
The easy tripping of big differential protection.
The content of the invention
In order to solve prior art problem, the present invention provides a kind of classification controllable high-voltage shunt reactor guard method, led to
Cross and failure occurs position progress positioning analysis.So as to judge whether occur troubles inside the sample space.
To achieve the above objectives, the present invention is realized using following technical scheme.
The technical solution adopted by the present invention is：
One kind classification controllable high-voltage shunt reactor guard method, comprises the following steps：
(1), collection transformer net side and controling winding side three-phase current, respectively calculate forward-order current, negative-sequence current and
The vector of zero-sequence current.
(2), it is respectively compared the arrow of forward-order current, forward-order current reverse vector and the negative-sequence current of net side and controling winding side
Magnitude relationship is measured, failure judgement occurs in current on line side or the power end or load side of controling winding side electric current；
(3) if, source side winding electric current failure judgement occur load side in source side winding electric current, and controling winding side electric current
Power end in controling winding side electric current occurs for failure judgement, then is judged as transformer troubles inside the sample space；If source side winding electric current, control
Winding side electric current failure judgement processed occurs in power end or load side, to be then judged to external area error.
More preferably, step (2) failure judgement occurs still to bear in the power end of current on line side or controling winding side electric current
Lotus end, specifically includes following steps：By the forward-order current of current on line side, the arrow of forward-order current reverse vector respectively with negative-sequence current
Amount is compared, when the phasor difference of forward-order current and negative-sequence current is more than the phasor difference of forward-order current reverse vector and negative-sequence current
When, the power end in current on line side occurs for failure, otherwise determines that the load side in current on line side occurs for failure；
Vector by the forward-order current of controling winding side electric current, forward-order current reverse vector respectively with negative-sequence current is compared
Compared with, when the phasor difference of forward-order current and negative-sequence current is more than the phasor difference of forward-order current reverse vector and negative-sequence current, failure
Occur the power end in controling winding side electric current, otherwise determine that the load side in controling winding side electric current occurs for failure.
Compared with prior art, beneficial effect of the present invention includes：
Carried out the invention provides one kind classification controllable high-voltage shunt reactor guard method by occurring position to failure
Judge, compared with big differential protection, big differential protection needs to adjust differential definite value, is easily influenceed by both sides CT Transfer characteristic errors,
Sensitivity is caused to be a greater impact, and the present invention compares without carrying out quantitative threshold to both sides fault current, without considering two
Property difference between the CT of side, so as to greatly improve protection sensitivity.
Brief description of the drawings
Fault location single-phase schematic diagram when Fig. 1 high-leakage impedance transformer mains sides break down；
Fault location single-phase schematic diagram when Fig. 2 high-leakage impedance transformer load sides break down；
Fault location single-phase schematic diagram when being broken down in Fig. 3 high-leakage impedance transformers area.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
One kind classification controllable high-voltage shunt reactor guard method, comprises the following steps：
(1), collection transformer net side and controling winding side three-phase current, respectively calculate forward-order current, negative-sequence current and
The vector of zero-sequence current.
(2), it is respectively compared the arrow of forward-order current, forward-order current reverse vector and the negative-sequence current of net side and controling winding side
Magnitude relationship is measured, failure judgement occurs in current on line side or the power end or load side of controling winding side electric current；
Failure judgement occur in current on line side or the power end or load side of controling winding side electric current, specifically include with
Lower step：Vector by the forward-order current of current on line side, forward-order current reverse vector respectively with negative-sequence current is compared, when just
When the phasor difference of sequence electric current and negative-sequence current is more than the phasor difference of forward-order current reverse vector and negative-sequence current, failure occurs in net
The power end of side electric current, otherwise determines that the load side in current on line side occurs for failure；
Vector by the forward-order current of controling winding side electric current, forward-order current reverse vector respectively with negative-sequence current is compared
Compared with, when the phasor difference of forward-order current and negative-sequence current is more than the phasor difference of forward-order current reverse vector and negative-sequence current, failure
Occur the power end in controling winding side electric current, otherwise determine that the load side in controling winding side electric current occurs for failure.
(3) if, source side winding electric current failure judgement occur load side in source side winding electric current, and controling winding side electric current
Power end in controling winding side electric current occurs for failure judgement, then is judged as transformer troubles inside the sample space；If source side winding electric current, control
Winding side electric current failure judgement processed occurs in power end or load side, to be then judged to external area error.As shown in FIG. 1 to 3, net
Failure is pointed to forever in the direction that side and controling winding side both sides are judged, it is impossible to the opposite situation of walking direction occur.
As shown in figure 1, when unbalanced fault occurs for high-leakage impedance transformer mains side, net side is electric according to the positive sequence of the side
The vector ratio of stream, forward-order current reverse vector and negative-sequence current is compared with the phasor difference of discovery forward-order current and negative-sequence current is more than just
The phasor difference of sequence electric current reverse vector and negative-sequence current, it may be determined that the mains side in source side winding electric current occurs for failure.Control
Winding lateral root determines that failure also occurs in the mains side of controling winding electric current according to same comparison.So as to be determined as outside transformer area
Failure.
As shown in Fig. 2 when unbalanced fault occurs for high-leakage impedance transformer load side, net side is electric according to the positive sequence of the side
The vector ratio of stream, forward-order current reverse vector and negative-sequence current is compared with the phasor difference of discovery forward-order current and negative-sequence current is less than just
The phasor difference of sequence electric current reverse vector and negative-sequence current, it may be determined that the load side in source side winding electric current occurs for failure.Control
Winding lateral root determines that failure also occurs in the load side of controling winding electric current according to same comparison.So as to be determined as outside transformer area
Failure.
As shown in figure 3, when unbalanced fault occurs in high-leakage impedance transformer area, net side according to the forward-order current of the side,
The vector ratio of forward-order current reverse vector and negative-sequence current is compared with the phasor difference of discovery forward-order current and negative-sequence current is less than positive sequence electricity
Flow the phasor difference of reverse vector and negative-sequence current, it may be determined that the load side in source side winding electric current occurs for failure.Controling winding
Lateral root is according to the vector ratio of the forward-order current, forward-order current reverse vector and negative-sequence current of the side compared with discovery forward-order current and negative phase-sequence
The phasor difference of electric current is more than the phasor difference of forward-order current reverse vector and negative-sequence current, it may be determined that failure occurs in source side winding
The mains side of electric current.So as to be determined as transformer troubles inside the sample space.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (1)
1. it is classified controllable high-voltage shunt reactor guard method, it is characterised in that comprise the following steps：
（1）, collection transformer net side and controling winding side three-phase current, forward-order current, negative-sequence current and zero sequence are calculated respectively
The vector of electric current；
（2）, be respectively compared net side and controling winding side forward-order current, forward-order current reverse vector and negative-sequence current vector it is big
Small relation, failure judgement occurs in current on line side or the power end or load side of controling winding side electric current；
The step（2）Failure judgement occurs in current on line side or the power end or load side of controling winding side electric current, tool
Body comprises the following steps：Vector by the forward-order current of current on line side, forward-order current reverse vector respectively with negative-sequence current is carried out
Compare, when the phasor difference of forward-order current and negative-sequence current is more than the phasor difference of forward-order current reverse vector and negative-sequence current, therefore
Power end in current on line side occurs for barrier, otherwise determines that the load side in current on line side occurs for failure；
Vector by the forward-order current of controling winding side electric current, forward-order current reverse vector respectively with negative-sequence current is compared,
When the phasor difference of forward-order current and negative-sequence current is more than the phasor difference of forward-order current reverse vector and negative-sequence current, failure occurs
In the power end of controling winding side electric current, otherwise determine that the load side in controling winding side electric current occurs for failure；
（3）If, source side winding electric current failure judgement occur source side winding electric current load side, and controling winding side electric current judge
Power end in controling winding side electric current occurs for failure, then is judged as transformer troubles inside the sample space；If source side winding electric current, control around
Group side electric current failure judgement occurs in power end or load side, to be then judged to external area error.
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| CN201510417024.1A CN105162090B (en) | 2015-07-15 | 2015-07-15 | It is classified controllable high-voltage shunt reactor guard method |
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| CN201510417024.1A CN105162090B (en) | 2015-07-15 | 2015-07-15 | It is classified controllable high-voltage shunt reactor guard method |
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| CN105162090A CN105162090A (en) | 2015-12-16 |
| CN105162090B true CN105162090B (en) | 2017-09-15 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207272A (en) * | 2007-11-16 | 2008-06-25 | 国电南京自动化股份有限公司 | Turn space protection for reactor sequence component direction |
| CN102437556A (en) * | 2011-08-04 | 2012-05-02 | 天津大学 | Sequence component longitudinal direction protection method of six-phase power transmission line |
| EP2544322A1 (en) * | 2011-07-05 | 2013-01-09 | ABB Technology AG | A method of selecting between internal and external faults in parallel lines using one-end measurements |
| CN104092186A (en) * | 2014-07-15 | 2014-10-08 | 国家电网公司 | Thee-phase three-winding transformer fault relay protection method based on sudden changes of positive sequence currents |
-
2015
- 2015-07-15 CN CN201510417024.1A patent/CN105162090B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101207272A (en) * | 2007-11-16 | 2008-06-25 | 国电南京自动化股份有限公司 | Turn space protection for reactor sequence component direction |
| EP2544322A1 (en) * | 2011-07-05 | 2013-01-09 | ABB Technology AG | A method of selecting between internal and external faults in parallel lines using one-end measurements |
| CN102437556A (en) * | 2011-08-04 | 2012-05-02 | 天津大学 | Sequence component longitudinal direction protection method of six-phase power transmission line |
| CN104092186A (en) * | 2014-07-15 | 2014-10-08 | 国家电网公司 | Thee-phase three-winding transformer fault relay protection method based on sudden changes of positive sequence currents |
Non-Patent Citations (2)
| Title |
|---|
| 基于故障支路电流序分量相位关系的选相元件;刘凯等;《电力自动化设备》;20130331;第33卷(第3期);第77-83页 * |
| 基于超高压自耦变压器中性点零序电流的方向比较纵联保护的研究;阿里木江▪卡德尔等;《电力系统保护与控制》;20141116;第42卷(第22期);第24-31页 * |
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