CN104242241A - YNd1 transformer longitudinal differential protection current phase compensation method - Google Patents
YNd1 transformer longitudinal differential protection current phase compensation method Download PDFInfo
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- CN104242241A CN104242241A CN201410460997.9A CN201410460997A CN104242241A CN 104242241 A CN104242241 A CN 104242241A CN 201410460997 A CN201410460997 A CN 201410460997A CN 104242241 A CN104242241 A CN 104242241A
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- transformer
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- ynd1
- differential protection
- wiring
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Abstract
The invention belongs to relay protection and control technologies of electric power transmission and distribution networks, and relates to an YNd1 transformer longitudinal differential protection current phase compensation method. According to the method, a-phase TA secondary winding currents on the d side of an YNd1 wiring transformer are connected into an a-phase current loop on the d side of a YNd11 wiring microcomputer transformer differential protection device; c-phase TA secondary winding currents on the d side of the YNd1 wiring transformer are connected into a b-phase current loop on the d side of the YNd11 wiring microcomputer transformer differential protection device; b-phase TA secondary winding currents on the d side of the YNd1 wiring transformer are connected into a c-phase current loop on the d side of the YNd11 wiring microcomputer transformer differential protection device; software phase compensation of the YNd11 wiring microcomputer transformer differential protection device is used for conducting phase compensation on YNd1 wiring transformer differential protection. The YNd1 transformer longitudinal differential protection current phase compensation method can complete current phase compensation of YNd1 wiring transformer differential protection and is simple in principle and convenient to implement.
Description
Technical field
The invention belongs to the relay protection and control technology of electrical power distribution electric network, relate to a kind of method that YNd1 transformer longitudinal linked differential protection current phase compensates.
Background technology
Because transformer each side electric current possibility phase place is inconsistent, therefore transformer longitudinal linked differential protection (hereinafter referred to as transformer differential protection) will carry out current phase compensation.The method that transformer differential protection current phase compensates has two kinds: 1, traditional analog shifter: such as YNd11 transformer Y side current transformer (hereinafter referred to as TA) secondary winding adopts triangle d-11 wiring, d side TA secondary winding adopts star Y-12 wiring; 2, digit shifter: namely utilize software program and computing formula to carry out electric current phase shift to complete phase compensation.At present; 220kV and above tranformer protection are generally main protection backup protection integrated design, duplicate system retrofit; main protection backup protection integrated design is main protection and all backup protections all use same hardware and software in a cabinet, and the electric current of the every side of transformer main protection backup protection, voltage are all adopt TA, voltage transformer same group of secondary winding.Because main protection backup protection integrated transformer protective current loop is the same current circuit adopted; therefore traditional analog shifter can not be adopted to carry out current phase compensation; therefore the TA of each side of transformer must adopt wye connection, adopts electric current digit shifter to carry out phase compensation.110kV and following microcomputer transformer differential protection do not adopt traditional analog shifter to carry out current phase compensation at present yet; the TA of each side generally also adopts wye connection; also the electric current software phase compensation of differential protection is adopted, and progressively to main protection backup protection integrated design, two coverization configuration transition.Such as, but current each tranformer protection manufacturer differential protection electric current software phase compensating method only develops several conventional transformer connection group usually, and YNd11 wiring group and wiring combination etc. thereof, can not adapt to other wiring groups and wiring compound mode.
Summary of the invention
Problem to be solved by this invention is; there is provided one can utilize YNd11 transformer differential protection electric current software Phase Compensation System; complete the current phase compensation that various electric pressure transformer is YNd1 wiring (containing Yd1 wiring) transformer differential protection, and the method that principle YNd1 transformer longitudinal linked differential protection current phase that is simple, that implement conveniently, meet transformer differential protection current phase compensation principle compensates.
YNd1 transformer differential protection current phase of the present invention compensation method is:
YNd1 high voltage side of transformer, low-pressure side TA secondary winding all connect as wye connection; This YNd1 transformer Y side TA secondary winding A phase current, B phase current, C phase current access the A phase current of YNd11 differential protective device of transformer, B phase current, C phase current loop respectively; The concrete grammar of YNd1 transformer d side TA secondary winding each phase current access YNd11 wiring microcomputer transformer differential protection is as follows:
(1) by a phase current loop of YNd1 wiring transformer d side a phase TA secondary winding electric current access YNd11 wiring microcomputer transformer differential protection d side;
(2) by the b phase current loop of YNd1 wiring transformer d side c phase TA secondary winding electric current access YNd11 wiring microcomputer transformer differential protection d side;
(3) by the c phase current loop of YNd1 wiring transformer d side b phase TA secondary winding electric current access YNd11 wiring microcomputer transformer differential protection d side;
(4) utilize the software phase compensation of YNd11 wiring microcomputer transformer differential protection, phase compensation is carried out to YNd1 wiring transformer differential protection.
The transformer longitudinal linked differential protection general principle that the method for the phase compensation of YNd1 wiring transformer longitudinal differential protection electric current of the present invention meets completely, compared with the method used in existing based Transformer differential protection, tool has the following advantages:
1, the current phase compensation technique scheme of transmission and distribution networks electric substation YNd1 wiring various electric pressure transformer longitudinal linked differential protection device is applicable to.
2, by the conversion of each phase current of access transformer longitudinal linked differential protection device, YNd1 wiring transformer differential protection is converted to YNd11 wiring transformer differential protection, recycle the current phase compensation scheme of existing YNd11 microcomputer transformer differential protection, achieve the current phase compensation scheme of all YNd1 wiring transformer longitudinal differential protection devices, simple and practical, secondary circuit is changed little, easily realizes;
3, the current phase compensation scheme of YNd1 wiring transformer longitudinal differential protection device does not need the current phase compensation scheme changing existing YNd11 microcomputer transformer longitudinal differential protection device inside.
Accompanying drawing explanation
Fig. 1 is YNd1 transformer connection figure corresponding to the inventive method;
Fig. 2 is YNd11 transformer corresponding to the inventive method and YNd1 transformer connection graph of a relation;
Fig. 3 is the YNd1 transformer differential protection current phase compensation principle figure of the inventive method.
Embodiment
1, the phase relation of YNd11 wiring transformer and YNd1 series wiring transformer
Fig. 1 is shown in by YNd1 wiring transformer winding diagram.Because YNd1 high voltage side of transformer, low-pressure side three-phase voltage are all symmetrical, as long as therefore take out 1 line voltage compare, so have
in advance
30 degree.YNd11 wiring transformer winding diagram is shown in Fig. 2 (a)), in like manner YNd11 transformer
delayed
30 degree.We are YNd11 transformer
with YNd1 transformer
think and compare YNd11 transformer and YNd1 step down side by homophase
between relation.And YNd1 step down side
be the voltage of low pressure a winding in A phase iron core column in FIG
in fig. 2 (a)), we also can find the voltage of low pressure a winding in A phase iron core column
(regard as and be equivalent to YNd1 step down side
), in Fig. 2 (a)) the lead-out wire pile crown of the head " a " of mesolow a winding is labeled as " a ", the lead-out wire pile crown of tail " x " is labeled as " b ", remaining another lead-out wire pile crown note is " c ", so obtain in Fig. 2 (b)); In analysis chart 2 (b)) obtain another kind of YNd1 wiring transformer winding diagram.Namely the d side phase relation of YNd11 wiring transformer and YNd1 wiring transformer is as table 1.
The d side phase relation contrast table of table 1, YNd11 wiring transformer and YNd1 series wiring transformer
2, YNd1 transformer current software phase compensating method
YNd11 wiring transformer differential protection, manufactory has achieved transformer differential protection electric current software compensation in protection equipment for transformer.Requirement YNd1 serial transformer high-pressure side, low-pressure side TA secondary winding all connect as wye connection.
YNd11 wiring transformer d side winding and YNd1 wiring transformer d side winding each phase current relation in comparison sheet 1 (think each phase current homophase of YNd11 and YNd1 wiring transformer Y side winding); be not difficult to find a phase current, c phase current, the b phase current same-phase of a phase current of YNd11 wiring transformer d side winding, b phase current, c phase current and YNd1 wiring transformer d side winding; therefore, the compensation method of YNd1 wiring transformer differential protection current phase is drawn:
(1) each phase current of this YNd1 transformer Y side TA secondary winding each phase current access YNd11 wiring transformer differential protection is constant, and namely YNd1 transformer Y side TA secondary winding A phase current, B phase current, C phase current connect A phase current, B phase current, the C phase current of YNd11 transformer differential protection respectively.
(2) each phase current of YNd1 transformer access YNd11 wiring transformer this YNd1 transformer d side TA secondary winding of differential protection is: by a phase current loop of a phase TA secondary winding electric current of YNd1 wiring transformer d side access YNd11 wiring microcomputer transformer differential protection d side, the b phase current loop of c phase TA secondary winding electric current access YNd11 wiring microcomputer transformer differential protection d side, the c phase current loop of b phase TA secondary winding electric current access YNd11 wiring microcomputer transformer differential protection d side.
(3) by this conversion, YNd1 wiring transformer differential protection just changes YNd11 wiring transformer differential protection into; The electric current software phase compensation of recycling YNd11 wiring microcomputer transformer differential protection, thus the current phase finally achieving YNd1 wiring transformer differential protection compensates.Fig. 3 is shown in concrete wiring.
Claims (1)
1. a YNd1 transformer differential protection current phase compensation method, is characterized in that:
YNd1 high voltage side of transformer, low-pressure side TA secondary winding all connect as wye connection; This YNd1 transformer Y side TA secondary winding A phase current, B phase current, C phase current access the A phase current of YNd11 differential protective device of transformer, B phase current, C phase current loop respectively; The concrete grammar of YNd1 transformer d side TA secondary winding each phase current access YNd11 wiring microcomputer transformer differential protection is as follows:
(1) by a phase current loop of YNd1 wiring transformer d side a phase TA secondary winding electric current access YNd11 wiring microcomputer transformer differential protection d side;
(2) by the b phase current loop of YNd1 wiring transformer d side c phase TA secondary winding electric current access YNd11 wiring microcomputer transformer differential protection d side;
(3) by the c phase current loop of YNd1 wiring transformer d side b phase TA secondary winding electric current access YNd11 wiring microcomputer transformer differential protection d side;
(4) utilize the software phase compensation of YNd11 wiring microcomputer transformer differential protection, phase compensation is carried out to YNd1 wiring transformer differential protection.
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CN201410460997.9A CN104242241A (en) | 2014-09-11 | 2014-09-11 | YNd1 transformer longitudinal differential protection current phase compensation method |
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CN201410460997.9A CN104242241A (en) | 2014-09-11 | 2014-09-11 | YNd1 transformer longitudinal differential protection current phase compensation method |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104701814A (en) * | 2015-03-13 | 2015-06-10 | 国家电网公司 | Phase compensating method for longitudinal differential protective current of YNd7 wired transformer |
CN106486970A (en) * | 2016-11-28 | 2017-03-08 | 国网江苏省电力公司镇江供电公司 | Transformer phase differential current zero suppression Y side compensation method |
CN106786379A (en) * | 2016-11-28 | 2017-05-31 | 国网江苏省电力公司镇江供电公司 | YNy12 transformer longitudinal linked differential protection zero suppression compensation methodes |
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JPH07254520A (en) * | 1994-03-15 | 1995-10-03 | Toshiba Corp | Three-phase on-load voltage and phase adjusting transformer |
CN101119022A (en) * | 2006-08-02 | 2008-02-06 | 贵阳铝镁设计研究院 | Rectifier transformer group transverse bracing differential current protection method and apparatus |
CN102360857A (en) * | 2011-05-30 | 2012-02-22 | 国网电力科学研究院 | Integrated network distributing transformer with error compensating mutual inductor |
CN102983551A (en) * | 2012-11-13 | 2013-03-20 | 江苏省电力公司镇江供电公司 | Longitudinal differential protection current phase compensation method for YNd series transformer |
CN103248009A (en) * | 2013-05-20 | 2013-08-14 | 国家电网公司 | Longitudinal differential protection current phase compensation method for YNd5 transformer |
CN103248008A (en) * | 2013-05-20 | 2013-08-14 | 国家电网公司 | Longitudinal differential protection current phase compensation method for YNd7 transformer |
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2014
- 2014-09-11 CN CN201410460997.9A patent/CN104242241A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH07254520A (en) * | 1994-03-15 | 1995-10-03 | Toshiba Corp | Three-phase on-load voltage and phase adjusting transformer |
CN101119022A (en) * | 2006-08-02 | 2008-02-06 | 贵阳铝镁设计研究院 | Rectifier transformer group transverse bracing differential current protection method and apparatus |
CN102360857A (en) * | 2011-05-30 | 2012-02-22 | 国网电力科学研究院 | Integrated network distributing transformer with error compensating mutual inductor |
CN102983551A (en) * | 2012-11-13 | 2013-03-20 | 江苏省电力公司镇江供电公司 | Longitudinal differential protection current phase compensation method for YNd series transformer |
CN103248009A (en) * | 2013-05-20 | 2013-08-14 | 国家电网公司 | Longitudinal differential protection current phase compensation method for YNd5 transformer |
CN103248008A (en) * | 2013-05-20 | 2013-08-14 | 国家电网公司 | Longitudinal differential protection current phase compensation method for YNd7 transformer |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104701814A (en) * | 2015-03-13 | 2015-06-10 | 国家电网公司 | Phase compensating method for longitudinal differential protective current of YNd7 wired transformer |
CN106486970A (en) * | 2016-11-28 | 2017-03-08 | 国网江苏省电力公司镇江供电公司 | Transformer phase differential current zero suppression Y side compensation method |
CN106786379A (en) * | 2016-11-28 | 2017-05-31 | 国网江苏省电力公司镇江供电公司 | YNy12 transformer longitudinal linked differential protection zero suppression compensation methodes |
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