CN105044430A - Branch current detection method and system of double-bus distribution equipment parallel outlet wires - Google Patents
Branch current detection method and system of double-bus distribution equipment parallel outlet wires Download PDFInfo
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- CN105044430A CN105044430A CN201510310178.0A CN201510310178A CN105044430A CN 105044430 A CN105044430 A CN 105044430A CN 201510310178 A CN201510310178 A CN 201510310178A CN 105044430 A CN105044430 A CN 105044430A
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Abstract
The invention relates to a branch current detection method and system of double-bus distribution equipment parallel outlet wires. The branch current detection method of the double-bus distribution equipment parallel outlet wires comprises the following steps: detecting corresponding breaker states and knife states of buses and each outlet wire, wherein the breaker states and the knife states comprise closing states and opening states; respectively detecting bus currents and currents of each outlet wire; and according to the breaker states, the knife states, the bus currents and the currents of each outlet wire, detecting current values of two branches of the parallel outlet wires, wherein the parallel wires refer to the outlet wires whose bus knives are both closed, and currents of the parallel outlet wires are divided into the two branches at an output end. According to the invention, the current values of the two branches of the parallel outlet wires in double-bus distribution equipment can be accurately detected, subsequent current distribution of a correlation loop of the double-bus distribution equipment is conveniently carried out based on the detected current values of the two branches of the parallel outlet wires, and the safety of the double-bus distribution equipment is improved.
Description
Technical field
The present invention relates to technical field of electric power, particularly relate to tributary electric current detecting method and the system of the outlet arranged side by side of a kind of double-bus distribution equipment.
Background technology
Transformer station's double-bus distribution equipment, when carrying out " first closing post-tensioning " operation of falling bus, exist due to reasons such as disconnecting link combined floodgate are not in place, GIS busbar joint insertion depth is not enough, loose contact, contact resistance is excessive, even opens a way, and causes on-load broaching tool lock when disconnecting link pulls open operation, there is the risk of busbar short-circuit, the major accident of two sections of bus loss of pressure occurs.
Double-bus distribution equipment generally comprises two buses, corresponding some the outlets of every bar bus, and the electric current of every bar outlet can be shunted at its output terminal, is divided into two tributaries; Wherein, isolating switch, disconnecting link are all installed in the tributary of each bus, outlet and outlet; Isolating switch, disconnecting link are all closed, and corresponding circuit pathways is described, in the isolating switch on certain branch road, disconnecting link, one or two disconnect, then corresponding circuit breaker is described; If the disconnecting link on certain outlet two tributaries is all closed, then this outlet is outlet arranged side by side.
The detection of the tributary electric current of double-bus distribution equipment outlet arranged side by side distributes significant to double-bus distribution equipment associated loop electric current, and prior art generally can only detect the electric current of each outlet, is difficult to the tributary electric current detecting the outlet arranged side by side of double-bus distribution equipment.
Summary of the invention
Based on this, be necessary the technical matters being difficult to the tributary electric current detecting the outlet arranged side by side of double-bus distribution equipment for prior art, tributary electric current detecting method and the system of the outlet arranged side by side of a kind of double-bus distribution equipment are provided.
A tributary electric current detecting method for double-bus distribution equipment outlet arranged side by side, comprises the steps:
Detect circuit-breaker status corresponding to mother, each outlet and disconnecting link state; Wherein, described circuit-breaker status, disconnecting link state comprise closure state and off-state;
Detect mother electric current respectively, respectively go out line current;
According to the current value in described circuit-breaker status, disconnecting link state, mother electric current, each outlet current detecting outlet two tributaries arranged side by side; Wherein, outlet arranged side by side refers to the outlet that two bus disconnecting links all close, and the electric current of outlet arranged side by side is divided into two tributaries at output terminal.
A tributary current detecting system for double-bus distribution equipment outlet arranged side by side, comprising:
First detection module, for detecting circuit-breaker status corresponding to mother, each outlet and disconnecting link state; Wherein, described circuit-breaker status, disconnecting link state comprise closure state and off-state;
Second detection module, for detecting mother electric current respectively, respectively going out line current;
3rd detection module, for the current value according to described circuit-breaker status, disconnecting link state, mother electric current, each outlet current detecting outlet two tributaries arranged side by side; Wherein, outlet arranged side by side refers to the outlet that two bus disconnecting links all close, and the electric current of outlet arranged side by side is divided into two tributaries at output terminal.
The tributary electric current detecting method of above-mentioned double-bus distribution equipment outlet arranged side by side and system, according to corresponding circuit-breaker status and disconnecting link state and the mother electric current of mother, each outlet, respectively go out line current, the current value in outlet two tributaries arranged side by side is detected, accurately can detect the current value in outlet two tributaries arranged side by side in double-bus distribution equipment, so that carry out the electric current distribution of follow-up double-bus distribution equipment associated loop according to the current value in detected outlet arranged side by side two tributaries, be conducive to the security improving double-bus distribution equipment.
Accompanying drawing explanation
Fig. 1 is the tributary electric current detecting method process flow diagram of the double-bus distribution equipment outlet arranged side by side of an embodiment;
Fig. 2 is the double-bus distribution device structure schematic diagram of an embodiment;
Fig. 3 is the tributary current detecting system structural representation of the double-bus distribution equipment outlet arranged side by side of an embodiment.
Embodiment
Below in conjunction with accompanying drawing, the tributary electric current detecting method of double-bus distribution equipment provided by the invention outlet arranged side by side and the embodiment of system are described in detail.
With reference to figure 1, Figure 1 shows that the tributary electric current detecting method process flow diagram of the double-bus distribution equipment outlet arranged side by side of an embodiment, comprise the steps:
S10, detects circuit-breaker status corresponding to mother, each outlet and disconnecting link state; Wherein, described circuit-breaker status, disconnecting link state comprise closure state and off-state;
With reference to figure 2, Figure 2 shows that the double-bus distribution device structure schematic diagram of the present embodiment, as diagram, this double-bus distribution equipment comprises two buses: bus 1 and bus 2, four outlets: outlet 1, outlet 2, outlet 3, outlet 4, and mother; Corresponding some the outlets of bus, as shown in Figure 2, the corresponding outlet 3 of bus 1, i.e. the electric current of outlet 3 can flow into bus 1; The corresponding outlet 2 of bus 2 and outlet 4, i.e. the electric current of outlet 2 and outlet 4 can flow into bus 2; Wherein, the electric current of mother is I
mL, the electric current of outlet 1, outlet 2, outlet 3 and outlet 4 is respectively I
1, I
2, I
3, I
4, the line current that goes out of every bar outlet is divided into two tributaries at output terminal, and the electric current in two tributaries of outlet 1 is respectively I
11, I
12, isolating switch, disconnecting link are all installed in the tributary of each bus, outlet and outlet, and above-mentioned isolating switch, disconnecting link comprise disconnection and closed two states, isolating switch, disconnecting link are all closed, corresponding circuit pathways is described, if both all do not close, then corresponding circuit breaker is described.Due in the different time periods, on each circuit, the state of isolating switch, disconnecting link is different, therefore needs the state detecting isolating switch, disconnecting link first respectively.
S20, detects mother electric current respectively, respectively goes out line current;
S30, according to the current value in described circuit-breaker status, disconnecting link state, mother electric current, each outlet current detecting outlet two tributaries arranged side by side; Wherein, outlet arranged side by side refers to the outlet that two bus disconnecting links all close, and the electric current of outlet arranged side by side is divided into two tributaries at output terminal.
In one embodiment, above-mentioned steps S30 can comprise:
Detect the space-number that two bus disconnecting links all close;
If the space-number that described two bus disconnecting links all close is 1, determine that each bus exports each phase current vector of each outlet and the first relation of each bus output current to according to the current trend of double-bus distribution equipment, and each outlet inputs to each phase current vector of each bus and the second relation of each bus input current;
The current value in outlet two tributaries arranged side by side is determined according to the first relation and the second relation.
In the present embodiment, the space-number that two bus disconnecting links all close is that 1 explanation, two buses are arranged side by side, can build the first relation and the second relation according to the disconnecting link state of the output of bus current and each outlet; When double-bus distribution equipment disconnecting link state as shown in Figure 2, namely the disconnecting link in mother is all closed, disconnecting link on two tributary circuits of outlet 1 is all closed, disconnecting link on two tributary circuits of outlet 2, outlet 3 and outlet 4 outlet 1 as shown in Figure 2, disconnection, one close, now, the first relation can be constructed as equation: I
11=-I
mL-I
3, the second relation can be constructed as equation: I
12=-I
2+ I
mL-I
4, wherein, I
11, I
12be respectively the electric current in two tributaries of outlet 1, I
mLfor the electric current of mother, I
2, I
3, I
4be respectively the electric current of outlet 2, outlet 3 and outlet 4; Above-mentioned first relation and the second relation are solved, just can determine the predicted value in two tributaries of each outlet.
As an embodiment, can comprise after the step of the space-number that above-mentioned detection two bus disconnecting links all close:
If the space-number that described two bus disconnecting links all close is 0, then return the step of the space-number that detection two bus disconnecting links all close.
In the present embodiment, if the space-number that described two bus disconnecting links all close is 0, illustrate that now this double-bus distribution equipment does not exist the bus of work side by side, can treat that the space-number that two bus disconnecting links all close is not 0, namely when the bus of this double-bus distribution equipment works side by side, more again the space-number that all closes of two bus disconnecting links is detected.
As an embodiment, can comprise after the step of the space-number that above-mentioned detection two bus disconnecting links all close:
If the space-number that described two bus disconnecting links all close is greater than 1, then judge that the disconnecting link that bus is corresponding exists fault, reports to the police.
In the present embodiment, if the space-number that described two bus disconnecting links all close is greater than 1, more than two of the bus number that now this double-bus distribution equipment of illustrating works side by side, come in and go out with theoretical situation outlet, the disconnecting link possibility outlet fault that bus is corresponding, now need to report to the police to this situation, notify that related personnel confirms this situation and further processes.
The tributary electric current detecting method of the double-bus distribution equipment outlet arranged side by side that the present embodiment provides, according to corresponding circuit-breaker status and disconnecting link state and the mother electric current of mother, each outlet, respectively go out line current, the current value in outlet two tributaries arranged side by side is detected, accurately can detect the current value in outlet two tributaries arranged side by side in double-bus distribution equipment, so that carry out the electric current distribution of follow-up double-bus distribution equipment associated loop according to the current value in detected outlet arranged side by side two tributaries, be conducive to the security improving double-bus distribution equipment.
With reference to figure 3, Figure 3 shows that the tributary current detecting system structural representation of the double-bus distribution equipment outlet arranged side by side of an embodiment, comprising:
First detection module 10, for detecting circuit-breaker status corresponding to mother, each outlet and disconnecting link state; Wherein, described circuit-breaker status, disconnecting link state comprise closure state and off-state;
Second detection module 20, for detecting mother electric current respectively, respectively going out line current;
3rd detection module 30, for the current value according to described circuit-breaker status, disconnecting link state, mother electric current, each outlet current detecting outlet two tributaries arranged side by side; Wherein, outlet arranged side by side refers to the outlet that two bus disconnecting links all close, and the electric current of outlet arranged side by side is divided into two tributaries at output terminal.
In one embodiment, above-mentioned 3rd detection module can be further used for:
Detect the space-number that two bus disconnecting links all close;
If the space-number that described two bus disconnecting links all close is 1, determine that each bus exports each phase current vector of each outlet and the first relation of each bus output current to according to the current trend of double-bus distribution equipment, and each outlet inputs to each phase current vector of each bus and the second relation of each bus input current;
The current value in outlet two tributaries arranged side by side is determined according to the first relation and the second relation.
As an embodiment, above-mentioned 3rd detection module can be further used for:
If the space-number that described two bus disconnecting links all close is 0, then return the step of the space-number that detection two bus disconnecting links all close.
As an embodiment, above-mentioned 3rd detection module can be further used for:
If the space-number that described two bus disconnecting links all close is greater than 1, then judge that the disconnecting link that bus is corresponding exists fault, reports to the police.
The tributary current detecting system of double-bus distribution equipment of the present invention outlet arranged side by side and the tributary electric current detecting method one_to_one corresponding of double-bus distribution equipment of the present invention outlet arranged side by side, the technical characteristic of setting forth in the embodiment of the tributary electric current detecting method of above-mentioned double-bus distribution equipment outlet arranged side by side and beneficial effect thereof are all applicable to, in the embodiment of the tributary current detecting system of double-bus distribution equipment outlet arranged side by side, hereby state.
Each technical characteristic of the above embodiment can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics does not exist contradiction, be all considered to be the scope that this instructions is recorded.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be construed as limiting the scope of the patent.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a tributary electric current detecting method for double-bus distribution equipment outlet arranged side by side, is characterized in that, comprise the steps:
Detect circuit-breaker status corresponding to mother, each outlet and disconnecting link state; Wherein, described circuit-breaker status, disconnecting link state comprise closure state and off-state;
Detect mother electric current respectively, respectively go out line current;
According to the current value in described circuit-breaker status, disconnecting link state, mother electric current, each outlet current detecting outlet two tributaries arranged side by side; Wherein, outlet arranged side by side refers to the outlet that two bus disconnecting links all close, and the electric current of outlet arranged side by side is divided into two tributaries at output terminal.
2. the tributary electric current detecting method of double-bus distribution equipment according to claim 1 outlet arranged side by side, it is characterized in that, the step of the described current value according to described circuit-breaker status, disconnecting link state, mother electric current, each outlet current detecting outlet two tributaries arranged side by side comprises:
Detect the space-number that two bus disconnecting links all close;
If the space-number that described two bus disconnecting links all close is 1, determine that each bus exports each phase current vector of each outlet and the first relation of each bus output current to according to the current trend of double-bus distribution equipment, and each outlet inputs to each phase current vector of each bus and the second relation of each bus input current;
The current value in outlet two tributaries arranged side by side is determined according to the first relation and the second relation.
3. the tributary electric current detecting method of double-bus distribution equipment according to claim 2 outlet arranged side by side, is characterized in that, comprises after the step of the space-number that described detection two bus disconnecting links all close:
If the space-number that described two bus disconnecting links all close is 0, then return the step of the space-number that detection two bus disconnecting links all close.
4. the tributary electric current detecting method of double-bus distribution equipment according to claim 2 outlet arranged side by side, is characterized in that, comprises after the step of the space-number that described detection two bus disconnecting links all close:
If the space-number that described two bus disconnecting links all close is greater than 1, then judge that the disconnecting link that bus is corresponding exists fault, reports to the police.
5. a tributary current detecting system for double-bus distribution equipment outlet arranged side by side, is characterized in that, comprising:
First detection module, for detecting circuit-breaker status corresponding to mother, each outlet and disconnecting link state; Wherein, described circuit-breaker status, disconnecting link state comprise closure state and off-state;
Second detection module, for detecting mother electric current respectively, respectively going out line current;
3rd detection module, for the current value according to described circuit-breaker status, disconnecting link state, mother electric current, each outlet current detecting outlet two tributaries arranged side by side; Wherein, outlet arranged side by side refers to the outlet that two bus disconnecting links all close, and the electric current of outlet arranged side by side is divided into two tributaries at output terminal.
6. the tributary current detecting system of double-bus distribution equipment according to claim 5 outlet arranged side by side, is characterized in that, described 3rd detection module is further used for:
Detect the space-number that two bus disconnecting links all close;
If the space-number that described two bus disconnecting links all close is 1, determine that each bus exports each phase current vector of each outlet and the first relation of each bus output current to according to the current trend of double-bus distribution equipment, and each outlet inputs to each phase current vector of each bus and the second relation of each bus input current;
The current value in outlet two tributaries arranged side by side is determined according to the first relation and the second relation.
7. the tributary electric current detecting method of double-bus distribution equipment according to claim 6 outlet arranged side by side, is characterized in that, described 3rd detection module is further used for:
If the space-number that described two bus disconnecting links all close is 0, then return the step of the space-number that detection two bus disconnecting links all close.
8. the tributary current detecting system of double-bus distribution equipment according to claim 6 outlet arranged side by side, is characterized in that, described 3rd detection module is further used for:
If the space-number that described two bus disconnecting links all close is greater than 1, then judge that the disconnecting link that bus is corresponding exists fault, reports to the police.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510310178.0A CN105044430B (en) | 2015-06-05 | 2015-06-05 | The tributary electric current detecting method and system of double-bus distribution equipment outlet arranged side by side |
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|---|---|---|---|
| CN201510310178.0A CN105044430B (en) | 2015-06-05 | 2015-06-05 | The tributary electric current detecting method and system of double-bus distribution equipment outlet arranged side by side |
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| CN105044430A true CN105044430A (en) | 2015-11-11 |
| CN105044430B CN105044430B (en) | 2018-01-16 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105762922A (en) * | 2016-04-07 | 2016-07-13 | 国网江苏省电力公司电力科学研究院 | Isolator current calculation-based dual-busbar thermal changeover operation safety early warning and evaluating method |
| CN105866509A (en) * | 2016-05-05 | 2016-08-17 | 北京英博电气股份有限公司 | Double-busbar current mutual induction sampling controller |
| CN106199415A (en) * | 2016-07-06 | 2016-12-07 | 广东电网有限责任公司电力调度控制中心 | Bus disconnecting link method for detecting position and system during mother is fallen based on main station system heat |
| CN109390939A (en) * | 2018-11-23 | 2019-02-26 | 国网江苏省电力有限公司检修分公司 | A kind of bus based on amperometry falls the differential diagnostic method that isolation plug-in strip not exclusively closes a floodgate when arranging operation |
| CN113341206A (en) * | 2021-06-21 | 2021-09-03 | 广东电网有限责任公司 | Method and device for determining steps of GIS double-bus parallel current |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109390939B (en) * | 2018-11-23 | 2021-10-08 | 国网江苏省电力有限公司检修分公司 | Differential diagnosis method for incomplete closing of isolation knife switch during bus inversion operation based on current analysis |
| CN113341206A (en) * | 2021-06-21 | 2021-09-03 | 广东电网有限责任公司 | Method and device for determining steps of GIS double-bus parallel current |
| CN113341206B (en) * | 2021-06-21 | 2022-03-04 | 广东电网有限责任公司 | Method and device for determining steps of GIS double-bus parallel current |
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