CN204009041U - Servicing unit for current mutual inductor with high transforming ratio field-checking in GIS - Google Patents
Servicing unit for current mutual inductor with high transforming ratio field-checking in GIS Download PDFInfo
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- CN204009041U CN204009041U CN201420425960.8U CN201420425960U CN204009041U CN 204009041 U CN204009041 U CN 204009041U CN 201420425960 U CN201420425960 U CN 201420425960U CN 204009041 U CN204009041 U CN 204009041U
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- lifting device
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- 230000001131 transforming effect Effects 0.000 title claims abstract description 22
- 239000003990 capacitor Substances 0.000 claims abstract description 49
- 238000002474 experimental method Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
Abstract
The utility model discloses a kind of servicing unit for current mutual inductor with high transforming ratio field-checking in GIS, it is characterized in that, the power frequency supply that comprises exportable 380VAC, described power frequency supply is connected with the former limit of current lifting device, the secondary of described current lifting device is connected with the current transformer in GIS, between the secondary of described current lifting device and current transformer, be in series with the first capacitor group, and be also parallel with the second capacitor group between the secondary of described current lifting device and current transformer, between described the first capacitor group, be respectively arranged with switch, between described the second capacitor group, be respectively arranged with switch.While solving the interior current mutual inductor with high transforming ratio field-checking of GIS, current lifting device capacity is large, surge capacity large, loop idle component compensation efficiency is not high, total current up-flow difficult problem, reduces experiment work intensity.
Description
Technical field
The utility model relates to a kind of servicing unit for current mutual inductor with high transforming ratio field-checking in GIS, belongs to the technical field of transducer check.
Background technology
To long apart from enclosed busbar GIS(GAS INSULATED SWITCHGEAR: gas-insulating and fully-enclosed combined electrical apparatus) during current mutual inductor with high transforming ratio field-checking, can not be completely that current transformer is independent, with the interval of upper some, (interval is GIS structural term, generally the equipment in GIS is packed in interval, by a plurality of interval complete GIS) and the bus of certain length.
Existence due to GIS interval and bus, the circuit in loop is long, impedance is large, during field-checking, servicing unit is required many, such as: require that up-flow place capacity is large, power is large ... as the UHV (ultra-high voltage) of a 4000A/1A in 200 meters of GIS loops, extra-high voltage current transformer, while carrying out field-checking under 120% rated current, needing power supply capacity is 800kVA left and right, and wherein real component is about 200kVA left and right, and idle component is about 750kVA left and right.If adopt the scheme of traditional current lifting device, the power supply capacity and the current lifting device capacity that need 800kVA left and right, scene often can not be realized, cause having no idea carrying out error checking at rules point, therefore on-the-spot how to realize up-flow, how to solve a field power supply difficult problem be to carry out at present the general difficult problem that in GIS, current mutual inductor with high transforming ratio error checking faces.
At present conventionally take the mode of building-out capacitor to carry out up-flow verification to current mutual inductor with high transforming ratio in GIS, to solve up-flow place capacity and the large problem of power supply capacity demand.
Fig. 1 is the schematic diagram of large electric current up-flow, and totally three kinds of the modes of existing building-out capacitor are specific as follows:
1) as shown in Figure 2, the former limit of current lifting device parallel capacitive compensation mode, has only reduced the capacity of pressure regulator and power supply, the capacity of current lifting device or actual capacity, and it is only applicable to the less loop of impedance.
2) as shown in Figure 3, current lifting device secondary parallel capacitive compensation mode, reduced the capacity of pressure regulator, current lifting device and power supply, but for the large measuring system of impedance loop, current lifting device two ends output voltage is high, and difficult design is applicable to fixing subjects.
3) as shown in Figure 4, current lifting device secondary series capacitor compensation mode, reduces pressure regulator and current lifting device capacity, and the voltage at capacitor two ends is high, but current lifting device output voltage is not high, is applicable to the relatively large or site test parameter of impedance loop and changes situation greatly.
But GIS loop is different in size, wiring is complicated, and the size definite and building-out capacitor amount of compensation way is difficult to accurate calculating, must calculate in good time and adjust according to on-the-spot situation, and experiment work intensity is large, and amount of calculation is large, and efficiency is not high.
Utility model content
For the problems referred to above, the utility model provides a kind of servicing unit for current mutual inductor with high transforming ratio field-checking in GIS, while solving the interior current mutual inductor with high transforming ratio field-checking of GIS, current lifting device capacity is large, surge capacity large, loop idle component compensation efficiency is not high, total current up-flow difficult problem, reduces experiment work intensity.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the utility model is achieved through the following technical solutions:
A kind of servicing unit for current mutual inductor with high transforming ratio field-checking in GIS, it is characterized in that, the power frequency supply that comprises exportable 380VAC, described power frequency supply is connected with the former limit of current lifting device, the secondary of described current lifting device is connected with the current transformer in GIS, between the secondary of described current lifting device and current transformer, be in series with the first capacitor group, and be also parallel with the second capacitor group between the secondary of described current lifting device and current transformer, between described the first capacitor group, be respectively arranged with switch, between described the second capacitor group, be respectively arranged with switch.
To long apart from enclosed busbar GIS in during current mutual inductor with high transforming ratio field-checking, can select according to actual conditions mode and the building-out capacitor amount size of compensation, at current lifting device secondary, carry out series and parallel compensation simultaneously, realize reactive-load compensation, reduce field power supply capacity, current lifting device capacity requirement, loop idle component compensation efficiency is high, wiring is simple, test operation is easy, two kinds of modes of parallel capacitive compensation and series capacitor compensation are applied in the circuit of different circuit, different impedances, make the maximizing efficiency of compensation, reduce experiment work intensity.
Preferably, described power frequency supply comprises voltage signal acquisition unit, the current signal collecting unit being connected with single-chip microcomputer respectively, and described single-chip microcomputer is connected with control motor, and described control motor is connected with pressure regulator.Can be by the voltage and current of voltage signal acquisition unit and current signal collecting unit while acquisition system, then the mode of judgement compensation and building-out capacitor amount size, control the output of motor adjusting pressure regulator, realizes the robotization of test up-flow.
The beneficial effects of the utility model are: while solving the interior current mutual inductor with high transforming ratio field-checking of GIS, current lifting device capacity is large, surge capacity large, loop idle component compensation efficiency is not high, total current up-flow difficult problem, reduces experiment work intensity.Further, improve the robotization of servicing unit.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of large electric current up-flow;
Fig. 2 is the schematic diagram of the former limit of current lifting device parallel capacitive compensation;
Fig. 3 is the schematic diagram of current lifting device secondary parallel capacitive compensation;
Fig. 4 is the schematic diagram of current lifting device secondary series capacitor compensation;
Fig. 5 is that the present invention is for the structural representation of the servicing unit of current mutual inductor with high transforming ratio field-checking in GIS;
Fig. 6 is the structured flowchart of power frequency supply of the present invention;
Fig. 7 is the structural representation of the present invention's the first capacitor group and the second capacitor group;
The mark implication of accompanying drawing is as follows:
1: power frequency supply; 2: current lifting device; The equivalent electrical circuit of current transformer in 3:GIS; 4: pressure regulator; 5: control motor; 6: single-chip microcomputer; 7: voltage signal acquisition unit; 8: current signal collecting unit; 9: display; ST: current lifting device; YT: pressure regulator; Current transformer primary circuit equivalent resistance in R:GIS; Current transformer primary circuit equiva lent impedance in ZL:GIS; C: building-out capacitor amount; C1: the first capacitor group; C2: the second capacitor group.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, technical solutions of the utility model are described in further detail, so that those skilled in the art can better understand the utility model being implemented, but illustrated embodiment is not as to restriction of the present utility model.
As shown in Figure 5, a kind of servicing unit for current mutual inductor with high transforming ratio field-checking in GIS, the power frequency supply 1 that comprises exportable 380VAC, described power frequency supply 1 is connected with the former limit of current lifting device 2, the secondary of described current lifting device 2 is connected with the current transformer in GIS, in Fig. 5, in GIS, the equivalent electrical circuit 3 of current transformer comprises current transformer primary circuit equivalent resistance R and the interior current transformer primary circuit equiva lent impedance ZL of GIS in GIS.Between the secondary of described current lifting device 2 and current transformer, be in series with the first capacitor group C1, and be also parallel with the second capacitor group C2 between the secondary of described current lifting device 2 and current transformer.
Wherein, the first capacitor group can be that several do not wait the Capacitance parallel connection of capacity to form, but preferably, the first capacitor group is that the Capacitance parallel connection of several capacity such as grade forms, same, the second capacitor group can be that several do not wait the Capacitance parallel connection of capacity to form, but preferably, the second capacitor group is that the Capacitance parallel connection of several capacity such as grade forms.Between the first capacitor group, be respectively arranged with switch, between the second capacitor group, be respectively arranged with switch, as described in Figure 7, the first capacitor group comprises C
11, C
12, C
13c
1N, the second capacitor group comprises C
21, C
22, C
23c
2N, can realize the mode of compensation and the selection of building-out capacitor amount size by the closed and disconnected of switch, this process can realize by hand also can be by controlling and realize automatically.
To long apart from enclosed busbar GIS in during current mutual inductor with high transforming ratio field-checking, can select according to actual conditions mode and the building-out capacitor amount size of compensation, at current lifting device 2 secondary, carry out series and parallel compensation simultaneously, realize reactive-load compensation, reduce field power supply capacity, current lifting device 2 capacity requirement, loop idle component compensation efficiency is high, wiring is simple, test operation is easy, two kinds of modes of parallel capacitive compensation and series capacitor compensation are applied in the circuit of different circuit, different impedances, make the maximizing efficiency of compensation, reduce experiment work intensity.
Preferably, as shown in Figure 6, power frequency supply 1 comprises voltage signal acquisition unit 7, the current signal collecting unit 8 being connected with single-chip microcomputer 6 respectively, and described single-chip microcomputer 6 is connected with control motor 5, and described control motor 5 is connected with pressure regulator 4.In order to show relevant acquisition parameter and to control parameter, display 9 can be connected with single-chip microcomputer 6, for showing in real time parameters.In order to improve the robotization of servicing unit, preferably, control motor 5 and be connected with switch in the first capacitor group and the switch in the second capacitor group.
By voltage signal acquisition unit 7 and current signal collecting unit 8 simultaneously acquisition system voltage and current signal and send single-chip microcomputer 6 to, then the mode of judgement compensation and building-out capacitor amount are big or small, control the output that motor 5 regulates pressure regulator 4, realize the robotization of test up-flow.And the second capacitor group and the first capacitor group form by Multi-path electricity container and switch, the open and close state that can control by controlling motor 5 each switch changes compensation way, building-out capacitor amount, reaches the object of the optimal compensation.
These are only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (6)
1. the servicing unit for current mutual inductor with high transforming ratio field-checking in GIS, it is characterized in that, the power frequency supply (1) that comprises exportable 380VAC, described power frequency supply (1) is connected with the former limit of current lifting device (2), the secondary of described current lifting device (2) is connected with the current transformer in GIS, between the secondary of described current lifting device (2) and current transformer, be in series with the first capacitor group, and be also parallel with the second capacitor group between the secondary of described current lifting device (2) and current transformer, between described the first capacitor group, be respectively arranged with switch, between described the second capacitor group, be respectively arranged with switch.
2. a kind of servicing unit for current mutual inductor with high transforming ratio field-checking in GIS according to claim 1, it is characterized in that, described power frequency supply (1) comprises voltage signal acquisition unit (7), the current signal collecting unit (8) being connected with single-chip microcomputer (6) respectively, described single-chip microcomputer (6) is connected with control motor (5), and described control motor (5) is connected with pressure regulator (4).
3. a kind of servicing unit for current mutual inductor with high transforming ratio field-checking in GIS according to claim 2, is characterized in that, described power frequency supply (1) also comprises the display (9) being connected with single-chip microcomputer (6).
4. a kind of servicing unit for current mutual inductor with high transforming ratio field-checking in GIS according to claim 2, is characterized in that, the Capacitance parallel connection that described the first capacitor group is several capacity such as grade forms.
5. a kind of servicing unit for current mutual inductor with high transforming ratio field-checking in GIS according to claim 4, is characterized in that, the Capacitance parallel connection that described the second capacitor group is several capacity such as grade forms.
6. a kind of servicing unit for current mutual inductor with high transforming ratio field-checking in GIS according to claim 5, is characterized in that, described control motor (5) is connected with switch in the first capacitor group and the switch in the second capacitor group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420425960.8U CN204009041U (en) | 2014-07-31 | 2014-07-31 | Servicing unit for current mutual inductor with high transforming ratio field-checking in GIS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420425960.8U CN204009041U (en) | 2014-07-31 | 2014-07-31 | Servicing unit for current mutual inductor with high transforming ratio field-checking in GIS |
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| Publication Number | Publication Date |
|---|---|
| CN204009041U true CN204009041U (en) | 2014-12-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420425960.8U Expired - Fee Related CN204009041U (en) | 2014-07-31 | 2014-07-31 | Servicing unit for current mutual inductor with high transforming ratio field-checking in GIS |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155625A (en) * | 2014-07-31 | 2014-11-19 | 国家电网公司 | Auxiliary device for field calibration of high-transformation-ratio current transformer used in GIS |
-
2014
- 2014-07-31 CN CN201420425960.8U patent/CN204009041U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104155625A (en) * | 2014-07-31 | 2014-11-19 | 国家电网公司 | Auxiliary device for field calibration of high-transformation-ratio current transformer used in GIS |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100761 West Chang'an Avenue, Beijing, No. 86, No. Co-patentee after: Jiangsu Electric Power Company Patentee after: State Grid Corporation of China Co-patentee after: Electric Power Research Institute of Jiangsu Electric Power Company Co-patentee after: Wuhan pan electric Polytron Technologies Inc Address before: 100761 West Chang'an Avenue, Beijing, No. 86, No. Co-patentee before: Jiangsu Electric Power Company Patentee before: State Grid Corporation of China Co-patentee before: Electric Power Research Institute of Jiangsu Electric Power Company Co-patentee before: Wuhan Pandian Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20190731 |