CN204945342U - The differential proving installation in transforming plant DC power-supply system loop - Google Patents
The differential proving installation in transforming plant DC power-supply system loop Download PDFInfo
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- CN204945342U CN204945342U CN201520674201.XU CN201520674201U CN204945342U CN 204945342 U CN204945342 U CN 204945342U CN 201520674201 U CN201520674201 U CN 201520674201U CN 204945342 U CN204945342 U CN 204945342U
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- 230000001131 transforming effect Effects 0.000 title claims abstract description 14
- 238000009434 installation Methods 0.000 title claims abstract description 9
- 238000005070 sampling Methods 0.000 claims abstract description 41
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000001276 controlling effect Effects 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims abstract description 4
- 230000008054 signal transmission Effects 0.000 claims abstract description 4
- 238000012360 testing method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
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Abstract
The differential proving installation in transforming plant DC power-supply system loop, belong to power supply equipment technical field, in order to solve prior art Problems existing, direct current output interface connects the DC fuse load end of final stage, and direct current output interface delivers to parallel network reverse device by the sampling of current sampling circuit and voltage sampling circuit; Parallel network reverse device DC current convert to can synchronization AC current delivery to access electrical network unit, by access electrical network unit, AC signal is sent back electrical network; Parallel network reverse device is exported by the electric current that computing machine regulating and controlling is different, realizes the protection element movement that 0-500A electric current makes DC power supply circuit; Current value when current sampling circuit and voltage sampling circuit just can sample breaker actuation and magnitude of voltage, give A/D converter Signal transmissions simultaneously; Simulating signal is changed by A/D converter, converts digital data transmission to computing machine; Computing machine calculates digital signal, judges the acting characteristic of DC loop according to different electric currents and actuation time; Computing machine inputs report output unit by form crossover tool signal.
Description
Technical field
The utility model relates to a kind of test and calibration equipment of electric power converting equipment, particularly to the proving installation of transforming plant DC power-supply system current supply circuit Graded coordination, belongs to power supply equipment technical field.
Background technology
Transforming plant DC power-supply system is specially for computer equipment, opertaing device, proterctive equipment, automation equipment, telecontrol equipment, communication apparatus provide working power.Due to the importance of equipment, the object adopting direct supply realizes uninterrupted power supply, and the long-term stability realizing equipment is powered.When adopting the object of multi-stage protection to be to make the faults such as the overload of direct current power supply loop and short circuit occur, fail-safe control can be made at minimum zone, the work of normal device can not be affected.Each loop uses and fuse or DC circuit breaker has been installed as protection element.Due to DC fuse have conveniently, practical, these several years mainly DC circuit breaker as protection element.
Direct supply all experienced by three to the protection element of level Four from DC bus to terminator, and existing protection element has time delay protection, so the acting characteristic that different DC circuit breakers has them different.Connecting line between the protection element of 3-4 level is also inconsistent, also causes loop internal resistance completely different, and its short-circuit current is also just different.Feeder transmission internal resistance based on transforming plant DC current supply circuit is different, protection element is different, and its acting characteristic is only distinguished from different electric currents, Graded coordination problem that completely cannot be actual correct.Although existing isolating switch dispatches from the factory, Shi Douyou did action trip-gear, reality composition feeder line may different because of internal resistance, kind is different, batch difference, actuation time difference result in action of bypassing the immediate leadership.Potential safety hazard is brought in power transmission and transformation field.Work about electric power person is promoting the isolating switch with fuse characteristic always, solves as object malfunction probability of bypassing the immediate leadership, and accurately cannot judge whether DC power supply circuit exists the possibility of action of bypassing the immediate leadership because checking at all.So it is exactly very important for developing the differential proving installation in a kind of transforming plant DC power-supply system loop.
Utility model content
The utility model, in order to solve prior art Problems existing, proposes one and can be applied to the differential distribution calibration equipment of transforming plant DC power-supply system loop power supply.
The technical scheme of the utility model technical solution problem is:
The differential proving installation in transforming plant DC power-supply system loop, is characterized in that, this device comprises: direct current output interface, current sampling circuit, voltage sampling circuit, parallel network reverse device, access electrical network unit, A/D converter, computing machine and report output composition; Direct current output interface connects with current sampling circuit and voltage sampling circuit respectively; Current sampling circuit connects with parallel network reverse device; Current sampling circuit connects with A/D converter and parallel network reverse device respectively; Voltage sampling circuit connects with A/D converter; Parallel network reverse device connects with access electrical network unit and computing machine respectively; A/D converter connects with computing machine; Computing machine connects with report output unit;
Direct current output interface connects the DC fuse load end of final stage, and direct current output interface delivers to parallel network reverse device by the sampling of current sampling circuit and voltage sampling circuit; Parallel network reverse device DC current convert to can synchronization AC current delivery to access electrical network unit, by access electrical network unit, AC signal is sent back electrical network; Parallel network reverse device is exported by the electric current that computing machine regulating and controlling is different, realizes the protection element movement that 0-500A electric current makes DC power supply circuit; Current value when current sampling circuit and voltage sampling circuit just can sample breaker actuation and magnitude of voltage, give A/D converter Signal transmissions simultaneously; Simulating signal is changed by A/D converter, converts digital data transmission to computing machine; Computing machine calculates digital signal, judges the acting characteristic of DC loop according to different electric currents and actuation time; Computing machine inputs report output unit by form crossover tool signal.
The beneficial effects of the utility model are:
1, the utility model device effectively can verify that microcomputer ensures the Graded coordination of DC circuit breaker under different faults current conditions, can be applied to each transforming plant DC power supply Graded coordination correctness, the inspection of the malfunction that prevents from bypassing the immediate leadership.
2, this device is for direct current power supply loop, adopts DC current source to come rationality and the magnetic of simplation verification Graded coordination.
3, this device has lightweight, convenient test, is suitable for the test advantage in all transforming plant DC Power supply loops.
Accompanying drawing explanation
Fig. 1 is the structural representation of the differential proving installation in the utility model transforming plant DC power-supply system loop.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further details.
As shown in Figure 1, the differential proving installation in transforming plant DC power-supply system loop, that includes: DC load interface 1, current sampling circuit 2, voltage sampling circuit 3, parallel network reverse device 4, access electrical network unit 5, A/D converter 6, computing machine 7 and report output unit 8 form; Its circuit connects and connects with current sampling circuit 2 and voltage sampling circuit 3 respectively for direct current output interface 1; Current sampling circuit 2 connects with parallel network reverse device 4 and A/D converter 6 respectively; Voltage sampling circuit 3 connects with A/D converter 6; Parallel network reverse device 4 accesses electrical network unit 5 and computing machine 7 respectively; A/D converter 6 connects with computing machine 7; Computing machine 7 connects with report output unit 8.
Direct current output interface 1 connects the DC fuse load end of final stage, and direct current output interface 1 delivers to parallel network reverse device 4 by the sampling of current sampling circuit 2 and voltage sampling circuit 3; Parallel network reverse device 4 DC current convert to can synchronization AC current delivery to access electrical network unit 5, by access electrical network unit 5, AC signal is sent back electrical network; Parallel network reverse device 4 is exported by the electric current that computing machine regulating and controlling is different, realizes the protection element movement that 0-500A electric current makes DC power supply circuit; Current value when current sampling circuit 2 and voltage sampling circuit 3 just can sample breaker actuation and magnitude of voltage, simultaneously Signal transmissions to A/D converter 6; Simulating signal is changed by A/D converter 6, converts digital data transmission to computing machine 7; Computing machine 7 pairs of digital signals calculate fast, judge the acting characteristic of DC loop according to different electric currents and actuation time; Computing machine 7 inputs report output unit 8 by form crossover tool signal.
The interface of direct current output interface 1 DC load, connects with the positive and negative two ends of load.
Current sampling circuit 2 have employed RMS conversion chip AD736.The current signal of the amplifying circuit collection DC load be made up of amplifier converts voltage signal to and is sent to A/D converter 6, carries out voltage sample effect by sending A/D converter 6 after a voltage follower.
Voltage sampling circuit 3 adopts resistor voltage divider network, carries out voltage sample effect by sending A/D converter 6 after a voltage follower again.The positive and negative terminal voltage of direct collection DC load, the totalizer be made up of amplifier judges total voltage.
Parallel network reverse device 4 adopts the principle of inversion, and direct current is become alternating current, then AC signal is transferred to access electrical network unit 5 and computing machine 7.
Access electrical network unit 5 becomes direct current into alternating current by parallel network reverse device 4, then sends back electrical network.
The simulating signal of various information is changed by A/D converter 6, converts digital data transmission to computing machine 7.Model is ML14433, can ensure the precision measured.
Computing machine 7 is a kind of robot calculator devices for supercomputing, can carry out numerical evaluation, can carry out logical calculated again, also have store-memory function.Can run according to program, automatically, the modernization intelligent electronic device of high speed processing mass data.
Report output unit 8 can show data and broken line graph, then these data and broken line graph is changed into Excel form and can be printed by printer.
Claims (1)
1. the differential proving installation in transforming plant DC power-supply system loop, it is characterized in that, it comprises: DC load interface (1), current sampling circuit (2), voltage sampling circuit (3), parallel network reverse device (4), access electrical network unit (5), A/D converter (6), computing machine (7) and report output unit (8) composition; Direct current output interface (1) connects with current sampling circuit (2) and voltage sampling circuit (3) respectively; Current sampling circuit (2) connects with parallel network reverse device (4) and A/D converter (6) respectively; Voltage sampling circuit (3) connects with A/D converter (6); Parallel network reverse device (4) accesses electrical network unit (5) and computing machine (7) respectively; A/D converter (6) connects with computing machine (7); Computing machine (7) connects with report output unit (8);
Direct current output interface (1) connects the DC fuse load end of final stage, and direct current output interface (1) delivers to parallel network reverse device (4) by the sampling of current sampling circuit (2) and voltage sampling circuit (3); Parallel network reverse device (4) DC current convert to can synchronization AC current delivery give access electrical network unit (5), by access electrical network unit (5) AC signal is sent back electrical network; Parallel network reverse device (4) is exported by the electric current that computing machine regulating and controlling is different, realizes the protection element movement that 0-500A electric current makes DC power supply circuit; Current value when current sampling circuit (2) and voltage sampling circuit (3) just can sample breaker actuation and magnitude of voltage, give A/D converter (6) Signal transmissions simultaneously; Simulating signal is changed by A/D converter (6), converts digital data transmission to computing machine (7); Computing machine (7) calculates fast to digital signal, judges the acting characteristic of DC loop according to different electric currents and actuation time; Computing machine (7) inputs report output unit (8) by form crossover tool signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520674201.XU CN204945342U (en) | 2015-09-01 | 2015-09-01 | The differential proving installation in transforming plant DC power-supply system loop |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520674201.XU CN204945342U (en) | 2015-09-01 | 2015-09-01 | The differential proving installation in transforming plant DC power-supply system loop |
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| Publication Number | Publication Date |
|---|---|
| CN204945342U true CN204945342U (en) | 2016-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520674201.XU Expired - Fee Related CN204945342U (en) | 2015-09-01 | 2015-09-01 | The differential proving installation in transforming plant DC power-supply system loop |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158705A (en) * | 2015-09-01 | 2015-12-16 | 国家电网公司 | Loop difference testing apparatus of transformer substation direct-current power supply system |
| PH12017000114A1 (en) * | 2016-04-05 | 2019-01-21 | Sanyo Electric Co | Power conditioner |
| CN117805607A (en) * | 2024-02-29 | 2024-04-02 | 山西漳电科学技术研究院(有限公司) | DC level difference matching test method for power plant DC system |
-
2015
- 2015-09-01 CN CN201520674201.XU patent/CN204945342U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105158705A (en) * | 2015-09-01 | 2015-12-16 | 国家电网公司 | Loop difference testing apparatus of transformer substation direct-current power supply system |
| PH12017000114A1 (en) * | 2016-04-05 | 2019-01-21 | Sanyo Electric Co | Power conditioner |
| CN117805607A (en) * | 2024-02-29 | 2024-04-02 | 山西漳电科学技术研究院(有限公司) | DC level difference matching test method for power plant DC system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 Termination date: 20190901 |
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| CF01 | Termination of patent right due to non-payment of annual fee |