CN103116108B - Intelligent detector for direct-current power supply system of transformer substation - Google Patents
Intelligent detector for direct-current power supply system of transformer substation Download PDFInfo
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- CN103116108B CN103116108B CN201310054224.6A CN201310054224A CN103116108B CN 103116108 B CN103116108 B CN 103116108B CN 201310054224 A CN201310054224 A CN 201310054224A CN 103116108 B CN103116108 B CN 103116108B
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- 230000003071 parasitic effect Effects 0.000 claims abstract description 38
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 230000001131 transforming effect Effects 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
Abstract
The invention discloses an intelligent detector for a direct-current power supply system of a transformer substation. The intelligent detector comprises a high-frequency rectifying circuit (1) respectively connected with a high-frequency rectifying circuit direct-current output terminal (2), a polarity detection circuit (3), a ring network and a parasitic detection circuit (4), and the direct-current output terminal (2) is respectively connected with the polarity detection circuit (3), the ring network and the parasitic detection circuit (4). The intelligent detector is safe and rapid and accurate in judgment, and operation of the direct-current system is facilitated and simplified.
Description
Technical field:
The present invention relates to a kind of transforming plant DC power-supply system intelligent detection device, belong to electric system substation equipment maintenance and repair technical field.
Background technology:
At present, the microcomputer type insulating monitor of transforming plant DC electric system configuration, being all fill a sensor in order to detect leakage current to calculate stake resistance in every bar DC feeder loop, judging the insulation status of direct current positive and negative busbar with this, when reaching the alarm of alarming value timer.But microcomputer insulating monitor in use exists two kinds of situations: judge more accurate when ground connection occurs the straight-flow system of 1) powering to radiant type, for the straight-flow system having ring network power supply or parasitic loop, ubiquity route selection is forbidden; 2) insulating monitor working time is of a specified duration due to component aging, often there is the situation reported by mistake and fail to report, and after generation earth fault is reported to the police, is difficult to accurately location.In addition, according to Guo Wang company " 18 countermeasures ", two cover straight-flow systems should be installed by more than 220kV transformer station, along with the continuous expansion of substation capacity, straight-flow system also come huge, become increasingly complex, direct-current system loop problem is overlapped in unavoidable existence two, but this to be code unallowed, therefore develop a kind ofly accurately to judge that dress straight-flow system has the branch road of loop and the intelligent detection device untied by loop is imperative.
Summary of the invention:
The object of the invention is to overcome the deficiency of above-mentioned prior art and a kind of safety, quick is provided, judging fast accurately, convenient, to simplify straight-flow system work transforming plant DC power-supply system intelligent detection device.
Object of the present invention can be reached by following measure: a kind of transforming plant DC power-supply system intelligent detection device, it comprises high-frequency rectification circuit, high-frequency rectification circuit connects high-frequency rectification circuit DC output terminal, polarity detection circuit, looped network, parasitic testing circuit respectively, DC output terminal respectively with polarity detection circuit, looped network, parasitic testing circuit connect;
Described polarity detection circuit comprises Check up polarity decision circuitry, Check up polarity decision circuitry connects high-frequency rectification circuit output switch respectively, error-polarity connection accuses warning lamp divider resistance and error-polarity connection accuses warning lamp, high-frequency rectification circuit output switch connects high-frequency rectification circuit output relay, high-frequency rectification circuit output relay connects output relay contact, high-frequency rectification circuit respectively, and output relay contact connects error-polarity connection respectively and accuses warning lamp divider resistance, high-frequency rectification circuit DC output terminal;
Described looped network, parasitic testing circuit comprise looped network, parasitic testing circuit, voltage regulator circuit, looped network, parasitic testing circuit connect looped network respectively, parasitic testing circuit accuses warning lamp, high-frequency rectification circuit, parasitic testing circuit accuse warning lamp divider resistance, high-frequency rectification circuit DC output terminal, looped network, parasitic testing circuit announcement warning lamp is accused warning lamp divider resistance with looped network, parasitic testing circuit and is connected, voltage regulator circuit connects double circuit power supply detector switch, and double circuit power supply detector switch connects high-frequency rectification circuit.
The present invention can produce following good effect compared with the prior art: the present invention when not affecting transformer station direct current system safe operation, for the doubtful looped network parasitic loop of straight-flow system, ground loop provide the direct supply of isolation.First after device access straight-flow system, CPU quick and precisely judges whether out-put supply own and system power supply exist power supply reverse electrode phenomena, and if any " error-polarity connection of power supply pilot lamp " alarm, output switch can not close a floodgate, and reminds staff's corrigendum; Secondly by potential circuit, device more accurately judges whether this loop exists looped network, sneak case after exporting; 3rd, because device provides insulating power supply, loop and station straight-flow system can be isolated, make system fast, accurately judge whether this loop exists Grounding, for the long-standing looped network of straight-flow system, the searching and judge that rapidly ground loop provides safe, efficient means of parasitic loop, greatly convenient, to simplify straight-flow system work.
Accompanying drawing illustrates:
Fig. 1 is structured flowchart of the present invention;
Fig. 2 is the electric theory diagram of Polarity comparision circuit;
Fig. 3 is the electric theory diagram of looped network or parasitic loop testing circuit.
Embodiment: preferred forms of the present invention is elaborated below in conjunction with accompanying drawing:
Embodiment: a kind of transforming plant DC power-supply system intelligent detection device (see Fig. 1), it comprises high-frequency rectification circuit 1, high-frequency rectification circuit 1 connects high-frequency rectification circuit DC output terminal 2, polarity detection circuit 3, looped network, parasitic testing circuit 4 respectively, DC output terminal 2 respectively with polarity detection circuit 3, looped network, parasitic testing circuit 4 connect.
Polarity detection circuit 3(is see Fig. 2) comprise Check up polarity decision circuitry 3-2, Check up polarity decision circuitry 3-2 connects high-frequency rectification circuit output switch 3-1 respectively, error-polarity connection accuses warning lamp divider resistance 3-3 and error-polarity connection accuses warning lamp 3-4, high-frequency rectification circuit output switch 3-1 connects high-frequency rectification circuit output relay 3-5, high-frequency rectification circuit output relay 3-5 connects output relay contact 3-6 respectively, high-frequency rectification circuit 1, output relay contact 3-6 connects error-polarity connection respectively and accuses warning lamp divider resistance 3-3, high-frequency rectification circuit DC output terminal 2.
Looped network, parasitic testing circuit 4(is see Fig. 3) comprise looped network, parasitic testing circuit 4-3, voltage regulator circuit 4-4, looped network, parasitic testing circuit 4-3 connects looped network respectively, parasitic testing circuit accuses warning lamp 4-1, high-frequency rectification circuit 1, parasitic testing circuit accuses warning lamp divider resistance 4-2, high-frequency rectification circuit DC output terminal 2, looped network, parasitic testing circuit accuses warning lamp 4-1 and looped network, parasitic testing circuit is accused warning lamp divider resistance 4-2 and is connected, voltage regulator circuit 4-4 connects double circuit power supply detector switch 4-5, double circuit power supply detector switch 4-5 connects high-frequency rectification circuit 1.
When using apparatus of the present invention to detect the doubtful ground loop of transformer station direct current system, transforming plant DC power supply receives high-frequency rectification circuit DC output terminal 2 through doubtful loop, high-frequency rectification circuit 1 accesses 220V civil power, export 220V direct supply, but now can not directly output to high-frequency rectification circuit DC output terminal 2, need to detect the polarity of two-way direct supply.Polarity detection circuit 3 is sampled to the direct supply that direct supply and the transformer station direct current system of high-frequency rectification circuit 1 output export respectively, the direct supply that Check up polarity decision circuitry 3-2 exports high-frequency rectification circuit 1 and the direct supply isopolarity that transformer station direct current system exports compare, if the two reversed polarity, then error-polarity connection alarm indicator 3-4 is bright, and warning staff notes; The error-polarity connection alarm indicator 3-4 then polarity that do not work is correct, can be closed high-frequency rectification circuit output switch 3-1, and high-frequency rectification circuit output relay 3-5 coil is charged, and output relay contact 3-6 closes, major loop is connected, now high-frequency rectification circuit 1 and transforming plant DC power supply connect.As detected branch road generation DC earthing, the output switch of this branch road on direct current cabinet can be disconnected, the DC power supply that this branch road pick-up unit exports, earth point is isolated from former straight-flow system, ground connection disappears, thus known earth point occurs in this branch road, realize judging earth point fast, easy-to-look-up DC earthing.
When judging whether doubtful loop is looped network or parasitic loop, also need to detect through looped network, parasitic measure loop 4.Looped network, parasitic measure loop 4 is respectively through sampling to high-frequency rectification circuit 1 and doubtful loop direct supply, close the detector switch 4-5 of double circuit power supply, output voltage of the present invention is adjusted and doubtful ring current compares by voltage regulator circuit 4-4, through looped network, parasitic testing circuit 4-3 detects, if loop is ring network power supply two-circuit, looped network, parasitic testing circuit accuses warning lamp 4-1 through looped network, parasitic testing circuit is bright after accusing warning lamp divider resistance 4-2 dividing potential drop, point out this loop looped network, another road power supply connecing needing to search looped network removes, ensure the safe operation of straight-flow system.
Claims (1)
1. a transforming plant DC power-supply system intelligent detection device, it comprises high-frequency rectification circuit (1), high-frequency rectification circuit (1) connects high-frequency rectification circuit DC output terminal (2), polarity detection circuit (3), looped network, parasitic testing circuit (4) respectively, high-frequency rectification circuit DC output terminal (2) respectively with polarity detection circuit (3), looped network, parasitic testing circuit (4) connect, described polarity detection circuit (3) comprises Check up polarity decision circuitry (3-2), one end of Check up polarity decision circuitry (3-2) connects one end of high-frequency rectification circuit output switch (3-1) respectively, error-polarity connection accuses one end of warning lamp divider resistance (3-3) and one end of error-polarity connection announcement warning lamp (3-4), error-polarity connection announcement warning lamp divider resistance (3-3) is accused warning lamp (3-4) with error-polarity connection and is connected, the other end of error-polarity connection announcement warning lamp (3-4) connects the negative output terminal of high-frequency rectification circuit (1) respectively, high-frequency rectification circuit DC output terminal (2), the other end of high-frequency rectification circuit output switch (3-1) connects one end of high-frequency rectification circuit output relay (3-5), and the other end of high-frequency rectification circuit output relay (3-5) connects the positive output end of one end of output relay contact (3-6), high-frequency rectification circuit (1) respectively, one end of output relay contact (3-6) connects the positive output end of high-frequency rectification circuit (1), and the other end of output relay contact (3-6) connects the other end, high-frequency rectification circuit DC output terminal (2) that error-polarity connection accuses warning lamp divider resistance (3-3), described looped network, parasitic testing circuit (4) comprises looped network, parasitic testing circuit (4-3), voltage regulator circuit (4-4), looped network, parasitic testing circuit accuses warning lamp (4-1) and looped network, parasitic testing circuit is accused warning lamp divider resistance (4-2) series connection and is serially connected with looped network respectively, the both sides of parasitic testing circuit (4-3), looped network, the side of parasitic testing circuit (4-3) connects high-frequency rectification circuit (1), opposite side connects high-frequency rectification circuit DC output terminal (2), voltage regulator circuit (4-4) connects double circuit power supply detector switch (4-5), double circuit power supply detector switch (4-5) connects high-frequency rectification circuit (1).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310054224.6A CN103116108B (en) | 2013-02-20 | 2013-02-20 | Intelligent detector for direct-current power supply system of transformer substation |
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| CN201310054224.6A CN103116108B (en) | 2013-02-20 | 2013-02-20 | Intelligent detector for direct-current power supply system of transformer substation |
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| CN103116108A CN103116108A (en) | 2013-05-22 |
| CN103116108B true CN103116108B (en) | 2015-01-07 |
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| CN103713232A (en) * | 2013-12-31 | 2014-04-09 | 厦门普罗太克科技有限公司 | Intelligent alarm capable of preventing battery reverse polarity |
| CN113359003B (en) * | 2021-04-26 | 2024-04-02 | 中国南方电网有限责任公司超高压输电公司梧州局 | DC parasitic loop detection system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203101572U (en) * | 2013-02-20 | 2013-07-31 | 山东电力集团公司烟台供电公司 | Intelligent detection device for direct current power supply system of transformer substation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2000111599A (en) * | 1998-10-02 | 2000-04-21 | Gakusho Yo | Ground monitor of electrostatic ground system |
| CN1332211C (en) * | 2004-06-07 | 2007-08-15 | 山东大学 | DC power supply system grounded fault detecting method and circuit |
| CN200962442Y (en) * | 2006-09-29 | 2007-10-17 | 高密市供电公司 | Accumulator discharge unidirectional protector |
| CN101750540B (en) * | 2009-12-25 | 2011-11-02 | 上海希明电气技术有限公司 | Method for detecting parasitic loop of transformer station direct current system |
| CN101826724B (en) * | 2010-03-09 | 2013-10-23 | 海洋王照明科技股份有限公司 | Anti-reverse connection circuit of direct current power supply |
| CN201774301U (en) * | 2010-06-24 | 2011-03-23 | 甘肃省电力公司兰州供电公司 | High frequency switch DC supply system for substation |
| CN102590676B (en) * | 2012-02-28 | 2014-08-13 | 北京人民电器厂有限公司 | Device and method for detecting fault of direct current looped network of direct current power supply system |
| CN202502158U (en) * | 2012-03-15 | 2012-10-24 | 上海市电力公司 | Direct current system parasitic circuit resistance measuring device |
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| CN203101572U (en) * | 2013-02-20 | 2013-07-31 | 山东电力集团公司烟台供电公司 | Intelligent detection device for direct current power supply system of transformer substation |
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