CN102279347A - Judgment of grounding fault line in multi-stage power supply network system - Google Patents
Judgment of grounding fault line in multi-stage power supply network system Download PDFInfo
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- CN102279347A CN102279347A CN2011101768999A CN201110176899A CN102279347A CN 102279347 A CN102279347 A CN 102279347A CN 2011101768999 A CN2011101768999 A CN 2011101768999A CN 201110176899 A CN201110176899 A CN 201110176899A CN 102279347 A CN102279347 A CN 102279347A
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Abstract
The invention discloses a system for judging grounding fault and a method for judging grounding fault in a multi-stage power supply network. The multi-stage power supply network is a N-stage power supply network; the system comprises low current line selection devices arranged in a distribution section of each stage of power supply network, a first to a N-th stage low current line selection devices are formed; the system further comprises a grounding line selection logic control device, the first to the N-th stage low current line selection device are respectively and independently connected with the grounding line selection logic control device through optical fibre. According to the judging method, the grounding alarm signal of multi-stage power supply network grounding line selection device is managed uniformly, and then which stage and which circuit has the grounding fault is accurately judged, and the grounding line is directly founded out.
Description
Technical field
The present invention relates to technical field of relay protection, especially about the differentiation of the earth fault line in the multistage power supply network system in industrial park or the transformer station.
Background technology
The system of neutral-point solid ground, when singlephase earth fault took place, earth short circuit current was very big, and this system is called heavy current grounding system.General 110kV and above system adopt heavy current grounding system.Isolated neutral or through the system of extinguisher ground connection, when singlephase earth fault took place, owing to do not constitute short-circuit loop, earth short circuit current was little more a lot of than load current, this system is called small current neutral grounding system.
As shown in Figure 1, show a kind of structural representation of multistage power supply network system.This electric power system has three grades of supply networks, possesses station-service one-level distribution section, station-service secondary distribution section and three grades of distribution sections of station-service accordingly.This power supply network system adopts small current neutral grounding system, and when the single phase ground fault fault, distribution system is not influenced by tripping operation, can continue to move 2 hours, can continue power supply after the ground path excision.But should find faulty line this moment as early as possible, often adopts line-selected earthing device to come the failure judgement ground path in the prior art.Therefore, all disposed little electric current line selection apparatus in each grade distribution section, as the little electric current line selection apparatus of the station-service one-level among Fig. 1, the little electric current line selection apparatus 1 of station-service secondary, the little electric current line selection apparatus 2 of station-service secondary, three grades little electric current line selection apparatus 1 of station-service, three grades little electric current line selection apparatus 2 of station-service and three grades little electric current line selection apparatus 3 of station-service.But the shortcoming of the supply network of this configuration is exactly that definite needs of ground path are manually judged.Because when in the second level or third level current supply circuit generation earth fault and when reporting to the police, not only Dui Ying second or third level line selection apparatus reported to the police, the line-selected earthing device of first order supply network also can be reported to the police, thereby can not quote definite ground path exactly.When first order supply network generation earth fault, the operations staff need determine whether to also have the line selection apparatus of other power-feed section to report to the police, and could determine when having only definite other distribution section not report to the police that this power-feed section reports to the police.If operations staff's error in judgement, the problem that will cause the accident and enlarge.
Summary of the invention
The present invention will overcome above defective exactly, carries out unified management for the grounding alarm signal of multistage supply network line-selected earthing device, judges accurately that then earth fault has taken place for which rank of, which loop line road, directly finds out ground path.
According to specific embodiment disclosed by the invention, the system that is applied to differentiate in the multistage supply network earth fault of planting is disclosed, this multistage supply network is a N level supply network, this system comprises the little electric current line selection apparatus in the distribution section that is arranged at supply networks at different levels, form the 1st to the little electric current line selection apparatus of N level, this system also comprises the earthing wire-selecting logic control device, the described the 1st is connected communication by optical fiber with described earthing wire-selecting logic control device respectively independently to the little electric current line selection apparatus of N level, and described earthing wire-selecting logic control device comprises control system communication management module and control system communication logic processing module, is responsible for communicating by letter and judging that earth fault has taken place which rank of circuit of earthing wire-selecting logic control device and each little electric current line selection apparatus respectively.
The system that is applied to differentiate in the multistage supply network earth fault according to embodiment disclosed by the invention, the described the 1st to the N level in the little electric current line selection apparatus, adopt between the 1st and the 2nd grade of little electric current line selection apparatus by Shielded Twisted Pair interconnect communication, the 1st and the 2nd grade of little electric current line selection apparatus made as a whole mode of carrying out optical-fibre communications with the earthing wire-selecting logic control device by the 1st or the 2nd grade of little electric current line selection apparatus and substituted the 1st and the 2nd grade of little electric current line selection apparatus and carry out optical-fibre communications with the earthing wire-selecting logic control device independently then.
The system that is applied to differentiate in the multistage supply network earth fault according to embodiment disclosed by the invention is characterized in that, is respectively arranged with the opto-electronic conversion interface in earthing wire-selecting logic control device and little electric current line selection apparatus at different levels.
The system that is applied to differentiate in the multistage supply network earth fault according to embodiment disclosed by the invention is characterized in that the communications protocol between described earthing wire-selecting logic control device and the little electric current line selection apparatus at different levels is the Modbus agreement.
The invention also discloses the method for discrimination of earth fault in a kind of multistage supply network, this multistage supply network is a N level supply network, all be provided with little electric current line selection apparatus in the distribution section of every grade of supply network, form the 1st to the little electric current line selection apparatus of N level, described method of discrimination comprises step:
(1) judges whether the little electric current line selection apparatus of N level reports to the police;
(2) if the little electric current line selection apparatus of N level is reported to the police, judge that then earth fault takes place in the loop of N level supply network correspondence;
(3) if the little electric current line selection apparatus of N level is not reported to the police, then continue to judge whether the little electric current line selection apparatus of N-1 level reports to the police;
(4) if the little electric current line selection apparatus of N-1 level is reported to the police, judge that then earth fault takes place in the loop of N-1 level supply network correspondence;
(5) if the little electric current line selection apparatus of N-1 level is not reported to the police, judge then whether the little electric current line selection apparatus of N-2 level reports to the police;
(6) continue above-mentioned steps,,, judge that then earth fault takes place in the loop of the 1st grade of supply network correspondence if the 1st grade little electric current line selection apparatus reported to the police until the 1st grade of little electric current line selection apparatus, otherwise, step (1) returned;
Wherein, described N is the natural number greater than 1.This method can be applicable in the said system.
The present invention can be grounded the accurate selection of line fault and alleviate operations staff's burden, and can avoid the operations staff to judge the ground path expansion that has an accident by accident.
Description of drawings
Fig. 1 shows a kind of structural representation of multistage power supply network system;
Show to Fig. 2 principle the configuration mode of little electric current line selection apparatus at different levels of the present invention;
Fig. 3 has illustrated according to the logic judging method in the line selection signal logic judgment module of the embodiment of the invention;
Fig. 4 has illustrated the Star topology mode between the little electric current line selection apparatus in earthing wire-selecting logic control device and each zone;
Fig. 5 has illustrated the connected mode between the little electric current line selection apparatus in a kind of earthing wire-selecting logic control device of bus topolopy and each zone.
Embodiment
Further specify technical scheme of the present invention below by specific embodiment.As shown in Figure 2, show to principle the configuration mode of little electric current line selection apparatus at different levels of the present invention.With respect to the working method independently of little electric current line selection apparatus at different levels in the prior art, in an embodiment of the present invention, utilize computer communication technology, with the alerting signal of the little electric current line selection apparatus of each power-feed section gather, unified management, and in computing machine, set up the line selection signal logic judgment module, after the line selection signal logic judgment module receives the alerting signal of little electric current line selection apparatus at different levels, come to determine that exactly fault has taken place which bar circuit according to logic judging method.
As shown in Figure 3, illustrated according to the logic judging method in the line selection signal logic judgment module of the embodiment of the invention.Signal from next stage when line selection signal is judged begins to analyze, when next stage supply network is not reported to the police, judge again whether the line selection apparatus of upper level reports to the police, so just can get rid of layer by layer and determine it is which rank of supply network generation earth fault.After having determined to be which rank of supply network generation earth fault, the alarm circuit of the little electric current line selection apparatus of configuration is exactly corresponding ground path on this grade.The process of logic determines is: after start, judge at first whether host computer is normal with communicating by letter of little electric current line selection apparatus at different levels, if there is communication failure, then send alerting signal.According to above logic judging method, at first the signal from next stage begins to analyze, and in the present embodiment, comprises three grades of supply networks altogether, in other embodiments, can comprise N(N for greater than 1 natural number) the level supply network.When three grades little electric current line selection apparatus are not reported to the police, judge again whether the little electric current line selection apparatus of secondary reports to the police, and the rest may be inferred, when the little electric current line selection apparatus of secondary is not reported to the police, judge again whether the little electric current line selection apparatus of one-level reports to the police.When the little electric current line selection apparatus on the just highest supply network of the little electric current line selection apparatus of one-level is not reported to the police, continue to return judge next stage little electric current line selection apparatus---whether three grades little electric current line selection apparatus report to the police, form the process of cycle criterion.When the little electric current line selection apparatus on the i level supply network is reported to the police, just show that earth fault takes place in the loop of i level supply network correspondence.Whole deterministic process as shown in Figure 3.
From above deterministic process as can be seen, when the ground path of small current neutral grounding system was judged, at first each regional grounding alarm need be differentiated by the little electric current line selection apparatus in each zone.The following describes with to the corresponding hardware configuration of the configuration mode shown in the figure.The little electric current line selection apparatus in each zone is delivered to the earthing wire-selecting logic control device by the connected mode of Fig. 4 or Fig. 5 with the signal unification, logic judgement mode by Fig. 3 judgement of ground circuit that achieves a butt joint then, the earthing wire-selecting logic control device is corresponding to the line selection signal logic judgment module among Fig. 2.And, the earthing wire-selecting logic control device comprises control system communication management module and control system communication logic processing module, is responsible for communicating by letter and realizing as shown in Figure 3 logic determines process of earthing wire-selecting logic control device and each little electric current line selection apparatus respectively.
Under all distant situation of each station-service distribution segment distance, it is that optical fiber communicates that the communicating by letter of the little electric current line selection apparatus in earthing wire-selecting logic control device and each zone preferably adopted Star topology mode, communication media, as accompanying drawing 4.When indivedual distribution segment distances are nearer, for example, when little electric current line selection apparatus of station-service one-level and the little electric current line selection apparatus of station-service secondary close together, can adopt connected mode as little electric current line selection apparatus of station-service one-level among Fig. 5 and the little electric current line selection apparatus of station-service secondary, communicate by the bus topology mode, little electric current line selection apparatus of station-service one-level and the little electric current line selection apparatus of station-service secondary are unified more then communicates by optical fiber and earthing wire-selecting logic control device.
In the capable topology of star shown in Figure 4 mode, little electric current line selection apparatus at different levels carry out communication with the earthing wire-selecting logic control device independently by optical fiber respectively, owing to adopted optical fiber to carry out communication, therefore, on earthing wire-selecting logic control device and little electric current line selection apparatus, all be provided with the opto-electronic conversion interface, to realize the mutual conversion of photosignal.In bus topology mode shown in Figure 5, the Shielded Twisted Pair that adopt to be fit to short distance communication between little electric current line selection apparatus of the station-service one-level of close together and the little electric current line selection apparatus of station-service secondary is as communication media, and little electric current line selection apparatus of station-service one-level and the little electric current line selection apparatus of station-service secondary are done as a wholely to communicate by optical fiber and earthing wire-selecting logic control device.Three grades little electric current line selection apparatus of station-service communicate by optical fiber and earthing wire-selecting logic control device.The same with topological mode shown in Figure 4, on earthing wire-selecting logic control device and little electric current line selection apparatus, all be provided with the opto-electronic conversion interface, to realize the mutual conversion of photosignal.Because whether the alerting signal of the small current neutral grounding screening device of each section only has this section to report to the police and the sequence number of ground path, so, adopt the Modbus agreement just to be enough to satisfy the communicating requirement of this system.
According to embodiments of the invention, can be grounded the accurate selection of line fault and alleviate operations staff's burden, and can avoid the operations staff to judge the ground path expansion that has an accident by accident.
Claims (5)
1. system that is applied in the multistage supply network to differentiate earth fault, described multistage supply network is a N level supply network, this system comprises the little electric current line selection apparatus in the distribution section that is arranged at supply networks at different levels, form the 1st to the little electric current line selection apparatus of N level, this system also comprises the earthing wire-selecting logic control device, the described the 1st is connected communication by optical fiber with described earthing wire-selecting logic control device respectively independently to the little electric current line selection apparatus of N level, and described earthing wire-selecting logic control device comprises control system communication management module and control system communication logic processing module, is responsible for communicating by letter and judging that earth fault has taken place which rank of circuit of earthing wire-selecting logic control device and each little electric current line selection apparatus respectively.
2. the system that is applied to differentiate in the multistage supply network earth fault as claimed in claim 1, it is characterized in that, the described the 1st to the N level in the little electric current line selection apparatus, adopt between the 1st and the 2nd grade of little electric current line selection apparatus by Shielded Twisted Pair interconnect communication, the 1st and the 2nd grade of little electric current line selection apparatus made as a whole mode of carrying out optical-fibre communications with the earthing wire-selecting logic control device by the 1st or the 2nd grade of little electric current line selection apparatus and substituted the 1st and the 2nd grade of little electric current line selection apparatus and carry out optical-fibre communications with the earthing wire-selecting logic control device independently then.
3. as claim 1 or the 2 described systems that are applied to differentiate in the multistage supply network earth fault, it is characterized in that, in earthing wire-selecting logic control device and little electric current line selection apparatus at different levels, be respectively arranged with the opto-electronic conversion interface.
4. the system that is applied to differentiate in the multistage supply network earth fault as claimed in claim 3 is characterized in that the communications protocol between described earthing wire-selecting logic control device and the little electric current line selection apparatus at different levels is the Modbus agreement.
5. the method for discrimination of earth fault in the multistage supply network that is applied in the system as claimed in claim 1, this multistage supply network is a N level supply network, all be provided with little electric current line selection apparatus in the distribution section of every grade of supply network, form the 1st to the little electric current line selection apparatus of N level, described method of discrimination comprises step:
(1) judges whether the little electric current line selection apparatus of N level reports to the police;
(2) if the little electric current line selection apparatus of N level is reported to the police, judge that then earth fault takes place in the loop of N level supply network correspondence;
(3) if the little electric current line selection apparatus of N level is not reported to the police, then continue to judge whether the little electric current line selection apparatus of N-1 level reports to the police;
(4) if the little electric current line selection apparatus of N-1 level is reported to the police, judge that then earth fault takes place in the loop of N-1 level supply network correspondence;
(5) if the little electric current line selection apparatus of N-1 level is not reported to the police, judge then whether the little electric current line selection apparatus of N-2 level reports to the police;
(6) continue above-mentioned steps,,, judge that then earth fault takes place in the loop of the 1st grade of supply network correspondence if the 1st grade little electric current line selection apparatus reported to the police until the 1st grade of little electric current line selection apparatus, otherwise, step (1) returned;
Wherein, described N is the natural number greater than 1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110176899 CN102279347B (en) | 2011-06-28 | 2011-06-28 | Judgment of grounding fault line in multi-stage power supply network system |
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| CN 201110176899 CN102279347B (en) | 2011-06-28 | 2011-06-28 | Judgment of grounding fault line in multi-stage power supply network system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950465A (en) * | 2017-04-12 | 2017-07-14 | 山东科技大学 | A kind of mine low voltage electric network electric leakage pick method and system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017974A (en) * | 2007-03-06 | 2007-08-15 | 耿玉泉 | Single phase grounding failure positioning method and device of neutral point non direct grounding power grid |
| CN101261304A (en) * | 2008-04-25 | 2008-09-10 | 山东大学 | Low current grounding system distribution circuit single-phase earth fault automatic position setting method |
| CN101359823A (en) * | 2008-09-11 | 2009-02-04 | 樊国利 | One-phase grounding hierarchical or integral wire-selective device for high-voltage grid |
| CN101719663A (en) * | 2009-12-07 | 2010-06-02 | 梅素真 | Grounding line selection method, grounding line selection device and application system based on active component of zero sequence current |
| WO2011012015A1 (en) * | 2009-07-29 | 2011-02-03 | 江苏省电力公司常州供电公司 | Fault line selection method for small current grounding system of distribution network |
-
2011
- 2011-06-28 CN CN 201110176899 patent/CN102279347B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101017974A (en) * | 2007-03-06 | 2007-08-15 | 耿玉泉 | Single phase grounding failure positioning method and device of neutral point non direct grounding power grid |
| CN101261304A (en) * | 2008-04-25 | 2008-09-10 | 山东大学 | Low current grounding system distribution circuit single-phase earth fault automatic position setting method |
| CN101359823A (en) * | 2008-09-11 | 2009-02-04 | 樊国利 | One-phase grounding hierarchical or integral wire-selective device for high-voltage grid |
| WO2011012015A1 (en) * | 2009-07-29 | 2011-02-03 | 江苏省电力公司常州供电公司 | Fault line selection method for small current grounding system of distribution network |
| CN101719663A (en) * | 2009-12-07 | 2010-06-02 | 梅素真 | Grounding line selection method, grounding line selection device and application system based on active component of zero sequence current |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950465A (en) * | 2017-04-12 | 2017-07-14 | 山东科技大学 | A kind of mine low voltage electric network electric leakage pick method and system |
| CN106950465B (en) * | 2017-04-12 | 2023-05-05 | 山东科技大学 | Electric leakage detection and selection method and system for mine electric power network |
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