CN203720247U - Power direct current system short-circuiting current testing device - Google Patents
Power direct current system short-circuiting current testing device Download PDFInfo
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- CN203720247U CN203720247U CN201420108273.3U CN201420108273U CN203720247U CN 203720247 U CN203720247 U CN 203720247U CN 201420108273 U CN201420108273 U CN 201420108273U CN 203720247 U CN203720247 U CN 203720247U
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- system short
- test
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- electric power
- circuit current
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Abstract
The utility model relates to a power direct current system short-circuiting current testing device. The power direct current system short-circuiting current testing device includes a data acquisition module, a current splitter, a test module, a computer and an interface module. With the power direct current system short-circuiting current testing device of the utility model adopted, actual short-circuiting current can be estimated, and impact on a storage battery pack, which is caused by large current generated by direct short-circuiting, can be decreased, and influence on the service lives of storage batteries can be decreased; electric accidents, which are caused by power outage of other normal feeder loops which is further caused by over tripping of an upper-level protection electric appliance, will be avoided, and at the same time, hidden risks to personal safety, which are caused by large current in a testing process, can be also eliminated. The power direct current system short-circuiting current testing device can be operated through a computer, and the entire testing process can be accomplished automatically. Thus, the power direct current system short-circuiting current testing device is advantageous in safe and reliable operation, no need for manual intervention, simple operation and convenient use.
Description
Technical field
The utility model belongs to DC power systems technology field, relates to a kind of electric power DC system short-circuit current proving installation.
Background technology
When DC power system is normally moved, straight-flow system provides power switch for isolating switch, for relay protection and aut.eq., communication etc. provide working power; During fault, particularly in the situation of AC interruptions, straight-flow system is relay protection and aut.eq., isolating switch closes tripping operation, emergency lighting provides safe and reliable direct supply.Straight-flow system is the basic guarantee of relay protection of power system, aut.eq. and isolating switch correct operation, and the safe operation of transformer station has very high requirement to direct current supply reliability.The rationality that DC circuit breaker is selected and the correctness of differential cooperation can guarantee in case of emergency, and DC power system provides reliable source of power for high-voltage AC breaker breaker tripping and closing and protection, communication and aut.eq..Therefore how to judge that the rationality of DC circuit breaker selection and the correctness of differential cooperation are the current problems in the urgent need to research.
The selectivity of direct supply protective device is not only relevant with the characteristic of protective device itself, also relevant with DC power system short-circuit currents at different levels.Direct current protecting electrical equipment need to configure according to the size of DC power system short-circuit currents at different levels, and according to short-circuit current size, carrys out the selectivity of verification direct-current short circuit device.Therefore the size that needs test or calculating direct supply short-circuit current.In recent years, part operation power unit utilizes substation field battery pack to carry out short circuit simulation test to the differential cooperation of direct current protecting electrical equipment, adopt instrument test short-circuit current, the breaks such as oscillograph, multimeter, carry out the selectivity of the differential cooperation of verification substation field straight-flow system; The method is simulated field actual short fault the differential mated condition of verification DC system protection electrical equipment really; but in test process; once the differential cooperation in DC feeder to be measured loop can not meet the requirement of selective protection; will cause upper level protective device overstep tripping; cause other normal feeder assembly dead electricity and cause electric power accident, security that cannot warranty test, and test process and data analysis need all manually complete; complex operation, potential safety hazard is more.In certain one-level real simulation direct-current short circuit, with the cooperation of first short circuit electric current verification DC circuit breaker the superior and the subordinate, the method is simple and direct, at short-circuit current hour, respond well, but have certain danger during large short circuit current in simulation, the life-span of power-supply device is also had a certain impact.
Utility model content
Technical problem to be solved in the utility model be to provide a kind of can electric power DC system short-circuit current proving installation increasing storage battery service life, safe and simple.
For solving the problems of the technologies described above adopted technical scheme, be: a kind of electric power DC system short-circuit current proving installation, comprises data acquisition module, shunt, test module, computing machine and interface module;
The voltage sample end that the positive sampling terminal of described electric power DC system short-circuit current proving installation is described data acquisition module
e2 ﹢; The voltage sample end that the negative sampling terminal of described electric power DC system short-circuit current proving installation is described data acquisition module
e2 ﹣; The positive main electrical scheme end of described electric power DC system short-circuit current proving installation is
e1 ﹢port
;the negative main electrical scheme end of described electric power DC system short-circuit current proving installation is
e1 ﹣port
;
The data output end of described data acquisition module is connected with the PORT COM of described computing machine; Described computing machine is connected with described interface module by USB port; Described interface module connects the corresponding control input end of described test module;
The positive main electrical scheme end of test input termination of described test module
e1 ﹢port; The test output terminal of described test module connects negative main electrical scheme end through the primary connection terminal of described shunt
e1 ﹣port;
The respective input of data acquisition module described in the secondary output termination of described shunt.
Described test module comprises the 1st to n test branch road, and the structure of described the 1st to n test branch road is identical, and it comprises insulated gate bipolar transistor V
1-V
nand resistance R
1-R
n, wherein, n is greater than 1 integer; Described the 1st test branch road comprises insulated gate bipolar transistor V
1with described resistance R
1, described insulated gate bipolar transistor V
1with described resistance R
1after series connection, be connected on positive main electrical scheme end
e1 ﹢between the primary connection terminal of port and described shunt.
Described insulated gate bipolar transistor V
1-V
nmodel be CM200Y-24NF.
The model of described data acquisition module is IPAM-4017; The model of described shunt is FL-2; The model of described computing machine is for grinding magnificent AWS-8430; The model of described interface module is PCI-1758UDI-A.
The beneficial effects of the utility model are: actual short electric current is estimated out in the utility model test, and the impact of the large electric current producing while having avoided direct short-circuit to battery pack, has reduced the impact on the life of storage battery; Handling safety of the present utility model, reliable, can not cause that upper level protective device overstep tripping causes other normal feeder assembly dead electricity and causes electric power accident, has eliminated the hidden danger of large electric current to personal safety harm in process of the test simultaneously yet; The utility model operates by computing machine, and whole test process completes automatically, without manual intervention, simple to operate, easy to use.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Embodiment
Embodiment is as shown in Figure 1 known, and the utility model comprises data acquisition module, shunt, test module, computing machine and interface module;
The voltage sample end that the positive sampling terminal of described electric power DC system short-circuit current proving installation is described data acquisition module
e2 ﹢; The voltage sample end that the negative sampling terminal of described electric power DC system short-circuit current proving installation is described data acquisition module
e2 ﹣; The positive main electrical scheme end of described electric power DC system short-circuit current proving installation is
e1 ﹢port
;the negative main electrical scheme end of described electric power DC system short-circuit current proving installation is
e1 ﹣port
;
The data output end of described data acquisition module is connected with the PORT COM of described computing machine; Described computing machine is connected with described interface module by USB port; Described interface module connects the corresponding control input end of described test module;
The positive main electrical scheme end of test input termination of described test module
e1 ﹢port; The test output terminal of described test module connects negative main electrical scheme end through the primary connection terminal of described shunt
e1 ﹣port;
The respective input of data acquisition module described in the secondary output termination of described shunt.
Described test module comprises the 1st to n test branch road, and the structure of described the 1st to n test branch road is identical, and it comprises insulated gate bipolar transistor V
1-V
nand resistance R
1-R
n, wherein, n is greater than 1 integer; Described the 1st test branch road comprises insulated gate bipolar transistor V
1with described resistance R
1, described insulated gate bipolar transistor V
1with described resistance R
1after series connection, be connected on positive main electrical scheme end
e1 ﹢between the primary connection terminal of port and described shunt.
Described insulated gate bipolar transistor V
1-V
nmodel be CM200Y-24NF.
The model of described data acquisition module is IPAM-4017; The model of described shunt is FL-2; The model of described computing machine is for grinding magnificent AWS-8430; The model of described interface module is PCI-1758UDI-A.
The course of work of the present utility model is as follows: first disconnect institute's DC power system one-level DC circuit breaker load side of surveying and preset short-circuit point actual load, at the open-circuit voltage of this point measurement direct supply; In this default short-circuit point process resistive load, carry out little electric current instantaneous discharge generation current sudden change again, measure loop voltage and little electric current now; Then calculate straight-flow system loop equivalent resistance; Finally estimate this actual short electric current.
During testing experiment, untie the default short dot DC circuit breaker end opening actual load of In situ DC system feeder assembly to be measured, at the negative, positive terminals of this isolating switch end opening, the corresponding positive main electrical scheme end that connects described electric power DC system short-circuit current proving installation is on the one hand
e1 ﹢port and negative main electrical scheme end are
e1 ﹣port, on the other hand its corresponding positive sampling terminal of described electric power DC system short-circuit current proving installation that connects
e2 ﹢with negative sampling terminal
e2 ﹣; Closure is preset short dot DC circuit breaker again, and guarantees on DC feeder to be measured loop that other all direct current protecting electrical equipment is all in co-bit.By computing machine machine, by USB interface, communicated by letter with data acquisition module, by data acquisition module voltage sample end, gather continuous off-state voltage; By computing machine, through USB interface, pass through the interface module connecting test insulation module grid bipolar transistor IGBT pipe G utmost point again, controlling resistance load is connected number and is produced the little electric current of suitable test, by computing machine, pass through USB interface connection data acquisition module simultaneously, by data acquisition module voltage, current sample end, gather respectively DC loop voltage and current; Then calculate the default short-circuit point equivalent resistance of straight-flow system DC circuit breaker end opening, then estimate this and put true short-circuit current, the short-circuit current test predictor method of other positions is identical.Test rear safety and removed test connecting line, and restoring scene.
Claims (4)
1. an electric power DC system short-circuit current proving installation, is characterized in that: comprise data acquisition module, shunt, test module, computing machine and interface module;
The voltage sample end that the positive sampling terminal of described electric power DC system short-circuit current proving installation is described data acquisition module
e2 ﹢; The voltage sample end that the negative sampling terminal of described electric power DC system short-circuit current proving installation is described data acquisition module
e2 ﹣; The positive main electrical scheme end of described electric power DC system short-circuit current proving installation is
e1 ﹢port
;the negative main electrical scheme end of described electric power DC system short-circuit current proving installation is
e1 ﹣port
;
The data output end of described data acquisition module is connected with the PORT COM of described computing machine; Described computing machine is connected with described interface module by USB port; Described interface module connects the corresponding control input end of described test module;
The positive main electrical scheme end of test input termination of described test module
e1 ﹢port; The test output terminal of described test module connects negative main electrical scheme end through the primary connection terminal of described shunt
e1 ﹣port;
The respective input of data acquisition module described in the secondary output termination of described shunt.
2. a kind of electric power DC system short-circuit current proving installation according to claim 1, is characterized in that: described test module comprises the 1st to n test branch road, and the structure of described the 1st to n test branch road is identical, and it comprises insulated gate bipolar transistor V
1-V
nand resistance R
1-R
n, wherein, n is greater than 1 integer; Described the 1st test branch road comprises insulated gate bipolar transistor V
1with described resistance R
1, described insulated gate bipolar transistor V
1with described resistance R
1after series connection, be connected on positive main electrical scheme end
e1 ﹢between the primary connection terminal of port and described shunt.
3. a kind of electric power DC system short-circuit current proving installation according to claim 2, is characterized in that: described insulated gate bipolar transistor V
1-V
nmodel be CM200Y-24NF.
4. a kind of electric power DC system short-circuit current proving installation according to claim 3, is characterized in that: the model of described data acquisition module is IPAM-4017; The model of described shunt is FL-2; The model of described computing machine is for grinding magnificent AWS-8430; The model of described interface module is PCI-1758UDI-A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420108273.3U CN203720247U (en) | 2014-03-11 | 2014-03-11 | Power direct current system short-circuiting current testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420108273.3U CN203720247U (en) | 2014-03-11 | 2014-03-11 | Power direct current system short-circuiting current testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203720247U true CN203720247U (en) | 2014-07-16 |
Family
ID=51159388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420108273.3U Expired - Fee Related CN203720247U (en) | 2014-03-11 | 2014-03-11 | Power direct current system short-circuiting current testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203720247U (en) |
-
2014
- 2014-03-11 CN CN201420108273.3U patent/CN203720247U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140716 Termination date: 20160311 |