CN102023277A - Homonymic phase inter-line fault phase selection method of four-parallel line on same tower based on twelve-sequence component - Google Patents
Homonymic phase inter-line fault phase selection method of four-parallel line on same tower based on twelve-sequence component Download PDFInfo
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- One kind based on same bar four loop lines of 12 preface components with famous prime minister's cross line fault phase-selecting method, comprise option element acquired signal in the protective relaying device, acquired signal analyzed/calculated and carries out the identification of fault according to analysis/result of calculation, it is characterized in that:(1) the 12 phase current amounts on four loop line roads of collection protective relaying device installation place are as the required original electric weight of phase selection element;(2) 12 phase current row phasors of four loop lines are done matrixing and obtain 12 preface current components;(3) utilize the size of each preface component and phase relation to carry out the identification of fault.
- According to described same bar four loop lines based on 12 preface components of claim 1 with famous prime minister's cross line fault phase-selecting method, the identification that it is characterized in that described fault comprises the identification and fault identification mutually of faulty line.
- According to described same bar four loop lines based on 12 preface components of claim 1 with famous prime minister's cross line fault phase-selecting method, it is characterized in that the 12 phase current measurings on described four loop line roads are:Its data sampling frequency is 3MHz.
- According to described same bar four loop lines based on 12 preface components of claim 1 with famous prime minister's cross line fault phase-selecting method, it is characterized in that described 12 preface current components areWherein Be called e preface zero sequence respectively successively, f preface zero sequence, g preface zero sequence, h preface zero sequence, e preface positive sequence, f preface positive sequence, g preface positive sequence, h preface positive sequence, e preface negative phase-sequence, f preface negative phase-sequence, g preface negative phase-sequence and h preface negative-sequence current.
- According to described same bar four loop lines based on 12 preface components of claim 1 with famous prime minister's cross line fault phase-selecting method, it is characterized in that described matrixing is:It utilizes matrix M to realize conversion between 12 phase currents and the 12 preface electric currents.
- According to described same bar four loop lines based on 12 preface components of claim 1 with famous prime minister's cross line fault phase-selecting method, it is characterized in that between described 12 phase currents it being to be coupled mutually, and there is not coupling between the 12 preface electric currents, be 12 fully independently preface components, the relation between them satisfies following equation:
- According to claim 1 or 2 described same bar four loop lines based on 12 preface components with famous prime minister's cross line fault phase-selecting method, it is characterized in that the identification of described faulty line is specific as follows:(α) when detecting e 1Preface electric current (I E1) greater than h 1Preface electric current (I H1), simultaneously, e 1Preface electric current (I E1) greater than g 1Half of preface electric current Just represent I, cross line fault takes place in II loop line road;(b) when detecting e 1Preface electric current (I E1) greater than h 1Preface electric current (I H1), simultaneously, e 1Preface electric current (I E1) and g 1(the I of preface electric current G1) and greater than f 1Preface electric current (I F1), just represent I, cross line fault takes place in III loop line road;(c) when detecting e 1Preface electric current (I E1) and h 1Half of preface electric current Sum is greater than f 1Half of preface electric current Simultaneously, g 1Preface electric current (I G1) greater than f 1Half of preface electric current With h 1Half of preface electric current And, just represent I, cross line fault takes place in IV loop line road;(d) when detecting e 1Preface electric current (I E1) greater than h 1Preface electric current (I H1), simultaneously, e 1Preface electric current (I E1) and f 1Preface electric current (I F1) sum is greater than zero, just represents II, cross line fault takes place in III loop line road;(e) when detecting e 1Preface electric current (I E1) and f 1Preface electric current (I F1) and greater than zero, simultaneously, e 1Preface electric current (I E1) and h 1Preface electric current (I H1) sum is greater than g 1Preface electric current (I G1), just represent II, cross line fault takes place in IV loop line road;(f) when detecting e 1Preface electric current (I E1) and f 1Preface electric current (I F1) sum is greater than zero, simultaneously, e 1Preface electric current (I E1) and g 1Half of preface electric current Sum is then represented III greater than zero, between the IV loop line cross line fault takes place;Wherein ε is a threshold value, and it is neglected parameters such as the electric pressure of electrical network and system impedance greatly and chooses.
- According to claim 1 or 2 described same bar four loop lines based on 12 preface components with famous prime minister's cross line fault phase-selecting method, it is characterized in that the identification of described fault phase is specific as follows:(α ') is when detecting e 1Preface electric current (I E1) greater than e 0Preface electric current (I E0), simultaneously, e 1Preface electric current (I E1) greater than e 2Preface electric current (I E2), just represent A-A cross-line earth fault;(b ') is when detecting e 1Preface electric current (I E1) greater than e 0Preface electric current (I E0) α (α I doubly E0), simultaneously, e 1Preface electric current (I E1) greater than e 2Preface electric current (I E2) α 2(α doubly 2I E2), just represent B-B cross-line earth fault;Wherein,(c ') is when detecting e 1Preface electric current (I E1) greater than e 0Preface electric current (I E0) α 2(α doubly 2I E0), simultaneously, e 1Preface electric current (I EI) greater than e 2Preface electric current (I E2) α times (α I E2), just represent C-C cross-line earth fault;(d ') is when detecting e 0Preface electric current (I E0) and e 1Preface electric current (I E1) α (α I doubly E1) and e 2Preface electric current (I E2) α 2(α doubly 2I E2) sum is greater than zero, just represents AB-AB cross-line earth fault;(e ') is when detecting e 0Preface electric current (I E0) and e 1Preface electric current (I E1) α 2(α doubly 2I E1) and e 2Preface electric current (I E2) rotation alpha times (α I E2) sum is greater than zero, just represents AC-AC cross-line earth fault;(f ') is when detecting e 0Preface electric current (I E0) and e 1Preface electric current (I E1) and e 2Preface electric current (I E2) sum is greater than zero, just represents BC-BC cross-line earth fault.
- According to described same bar four loop lines based on 12 preface components of one of claim 1~8 with famous prime minister's cross line fault phase-selecting method; it is characterized in that each phase electric weight that described phase-selecting method does not directly adopt the protection installation place to record realizes that fault selects phase; but utilize independently each preface component; the transition resistance at used failure boundary condition of relation and fault place is irrelevant between each preface component; thereby the mutually used criterion of fault choosing is also irrelevant with transition resistance, has theoretic anti-fully transition resistance.
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
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CN103762569A (en) * | 2014-02-18 | 2014-04-30 | 国家电网公司 | Two phrase grounding short circuit fault direction discriminating method of double circuit lines on the same tower |
CN103983897A (en) * | 2014-04-25 | 2014-08-13 | 西安交通大学 | Method for distinguishing fault types of non-transposition same-tower double-circuit line |
CN105467275A (en) * | 2015-12-25 | 2016-04-06 | 北京四方继保自动化股份有限公司 | Cross-voltage fault current calculating method of mixed-voltage same tower four circuits with two-phase crossing two-phase |
CN105486981A (en) * | 2015-12-25 | 2016-04-13 | 华北电力大学 | Voltage-crossing fault current calculation method for crossing from single-phase to double-phase by mixed-voltage one tower four-parallel lines |
CN105510771A (en) * | 2015-12-25 | 2016-04-20 | 北京四方继保自动化股份有限公司 | Hybrid-voltage common-tower four-loop two-phase-cross-three-phase cross voltage fault current calculation method |
CN106291046A (en) * | 2016-07-28 | 2017-01-04 | 华北电力大学 | Mixed pressure common-tower double-return line single-phase across single-phase across voltage failure current calculation method |
CN112630587A (en) * | 2020-11-11 | 2021-04-09 | 大唐水电科学技术研究院有限公司 | Single-circuit three-phase disconnection fault analysis method for four-circuit line erected on same pole |
CN114019294A (en) * | 2021-09-13 | 2022-02-08 | 大唐水电科学技术研究院有限公司 | Method and device for analyzing three-phase disconnection fault of four-circuit line and four-circuit line on same pole |
-
2009
- 2009-09-17 CN CN 200910195767 patent/CN102023277B/en active Active
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103762569A (en) * | 2014-02-18 | 2014-04-30 | 国家电网公司 | Two phrase grounding short circuit fault direction discriminating method of double circuit lines on the same tower |
CN103762569B (en) * | 2014-02-18 | 2016-04-06 | 国家电网公司 | Analyses for double circuits on same tower two-phase short circuit and ground fault discriminating direction method |
CN103983897A (en) * | 2014-04-25 | 2014-08-13 | 西安交通大学 | Method for distinguishing fault types of non-transposition same-tower double-circuit line |
CN103983897B (en) * | 2014-04-25 | 2016-07-06 | 西安交通大学 | A kind of method for distinguishing the multiple-circuit on same tower fault type that do not replace |
CN105467275A (en) * | 2015-12-25 | 2016-04-06 | 北京四方继保自动化股份有限公司 | Cross-voltage fault current calculating method of mixed-voltage same tower four circuits with two-phase crossing two-phase |
CN105486981A (en) * | 2015-12-25 | 2016-04-13 | 华北电力大学 | Voltage-crossing fault current calculation method for crossing from single-phase to double-phase by mixed-voltage one tower four-parallel lines |
CN105510771A (en) * | 2015-12-25 | 2016-04-20 | 北京四方继保自动化股份有限公司 | Hybrid-voltage common-tower four-loop two-phase-cross-three-phase cross voltage fault current calculation method |
CN106291046A (en) * | 2016-07-28 | 2017-01-04 | 华北电力大学 | Mixed pressure common-tower double-return line single-phase across single-phase across voltage failure current calculation method |
CN106291046B (en) * | 2016-07-28 | 2019-11-12 | 华北电力大学 | Mixed pressure common-tower double-return line is single-phase across single-phase across voltage failure current calculation method |
CN112630587A (en) * | 2020-11-11 | 2021-04-09 | 大唐水电科学技术研究院有限公司 | Single-circuit three-phase disconnection fault analysis method for four-circuit line erected on same pole |
CN114019294A (en) * | 2021-09-13 | 2022-02-08 | 大唐水电科学技术研究院有限公司 | Method and device for analyzing three-phase disconnection fault of four-circuit line and four-circuit line on same pole |
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