CN204462283U - A kind of DC feeder Graded coordination proving installation - Google Patents
A kind of DC feeder Graded coordination proving installation Download PDFInfo
- Publication number
- CN204462283U CN204462283U CN201520144434.9U CN201520144434U CN204462283U CN 204462283 U CN204462283 U CN 204462283U CN 201520144434 U CN201520144434 U CN 201520144434U CN 204462283 U CN204462283 U CN 204462283U
- Authority
- CN
- China
- Prior art keywords
- isolating switch
- model
- feeder
- end opening
- card
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a kind of DC feeder Graded coordination proving installation, comprise host computer, small area analysis estimates test cell and short circuit simulation check test unit; Described small area analysis is estimated test cell and is comprised current sensor TA1, voltage transformer (VT) TV1, data collecting card, regulating load and the first to the second isolating switch K1-K2; Described short circuit simulation check test unit comprises shunt, timing relay, oscillograph card and the 3rd to the 4th isolating switch K3-K4; Its beneficial effect is: the utility model is applicable to substation field use, easy to carry, automaticity is high; operation maintenance department is facilitated to verify direct current protecting electrical equipment Graded coordination; improve straight-flow system reliability of operation, ensure power grid security reliability service.
Description
Technical field
The utility model belongs to transforming plant DC feeder line technical field of measurement and test, is specifically related to a kind of DC feeder Graded coordination proving installation.
Background technology
DC feedback network many employings tree structure of current transformer station, to arrive at a station interior consumer from accumulator, and generally through graduation three electricity, every grating TV university many employings DC circuit breaker is as protective device.Because the superior and the subordinate's DC circuit breaker protection act characteristic is not mated; in straight-flow system operational process; when there is short trouble in subordinate's consumer; often cause the overstep tripping of upper level DC circuit breaker; thus cause the loss of power accident of other feeder line, and then cause transforming plant primary equipment as the accident of high-voltage switch gear, transformer, capacitor etc.For preventing because DC circuit breaker and other direct current protecting electrical equipment acting characteristic do not mate the hidden danger brought, State Grid Corporation of China specifies, for new clothes and operating direct current protecting electrical equipment, must ensure the correctness of its DC loop Graded coordination.DL/T5044-2003 " power engineering DC techniques design discipline " specifies, the Graded coordination scheme of the DC circuit breaker in transformer station direct current system should meet the requirement of selective protection." DC power system operations specification " the Article 12 eighth item issued for 2005 specifies " DC fuse and air-break should adopt up-to-standard product; its fuse-link or definite value by relevant regulations hierarchical arrangement and should be adjusted; and regularly check, prevent the expansion accident because of its incorrect operation ".Can the matching problem of protective device how correct type selecting and selective protection between the superior and the subordinate, be directly connected to and the fault of direct supply be limited in minimum zone, this Accident prevention is expanded and equipment badly damaged most important.
At present; the DC power system of generating plant, transformer station can design according to relevant criterion substantially; ensure 2 ~ 4 differential; but whether the on-the-spot DC circuit breaker Graded coordination run meets the requirement of selective protection; repair and maintenance personnel are not because possessing corresponding means of testing and instrument; cannot carry out verification experimental verification, this just leaves hidden danger to safe operation of power system.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of DC feeder Graded coordination proving installation that applicable substation field uses, easy to carry, automaticity is high.
For solving the problems of the technologies described above adopted technical scheme being: a kind of DC feeder Graded coordination proving installation, comprising host computer, small area analysis estimates test cell and short circuit simulation check test unit; Described small area analysis is estimated test cell and is comprised current sensor TA1, voltage transformer (VT) TV1, data collecting card, regulating load and the first to the second isolating switch K1-K2; Described short circuit simulation check test unit comprises shunt, timing relay, oscillograph card and the 3rd to the 4th isolating switch K3-K4;
Positive pole+the KM connecing DC feeder suitable for reading of described isolating switch K1; Negative pole-the KM connecing DC feeder suitable for reading of described isolating switch K2; Between the end opening that described regulating load is connected on described isolating switch K1 and the end opening of isolating switch K2;
Described voltage transformer (VT) TV1 is connected on the two ends, end opening side of described isolating switch K1 and isolating switch K2; The respective input of data collecting card described in the output termination of described voltage transformer (VT) TV1;
Described current sensor TA1 is arranged on the end opening side current return of described isolating switch K1 and isolating switch K2; The respective input of data collecting card described in the output termination of described current sensor TA1;
Positive pole+the KM connecing DC feeder suitable for reading of described isolating switch K3; Negative pole-the KM connecing DC feeder suitable for reading of described isolating switch K4; Between described shunt is connected on described isolating switch K1 end opening after connecting with timing relay and the end opening of isolating switch K2; The respective input of oscillograph card described in the output termination of described shunt;
The output terminal of described data collecting card and oscillograph card connects the respective input of described host computer respectively.
Described regulating load is the Intelligent adjustment circuit be made up of 51 type single-chip microcomputers and peripheral circuit thereof.
The model of described current sensor TA1 is SCR-100A; The model of described voltage transformer (VT) TV1 is TV1907G; The model of described data collecting card is NI USB-6000; Described shunt is 100A/75m 0.2 grade; The model of described timing relay is 3RP10; The model that the model of described oscillograph card is is PBS2012.
The beneficial effects of the utility model are: the utility model is applicable to substation field use, easy to carry, automaticity is high; operation maintenance department is facilitated to verify direct current protecting electrical equipment Graded coordination; improve straight-flow system reliability of operation, ensure power grid security reliability service.
Accompanying drawing explanation
Fig. 1 is theory diagram of the present utility model.
Embodiment
Embodiment is as shown in Figure 1 known, and it comprises host computer, small area analysis estimates test cell and short circuit simulation check test unit; Described small area analysis is estimated test cell and is comprised current sensor TA1, voltage transformer (VT) TV1, data collecting card, regulating load and the first to the second isolating switch K1-K2; Described short circuit simulation check test unit comprises shunt, timing relay, oscillograph card and the 3rd to the 4th isolating switch K3-K4;
Positive pole+the KM connecing DC feeder suitable for reading of described isolating switch K1; Negative pole-the KM connecing DC feeder suitable for reading of described isolating switch K2; Between the end opening that described regulating load is connected on described isolating switch K1 and the end opening of isolating switch K2;
Described voltage transformer (VT) TV1 is connected on the two ends, end opening side of described isolating switch K1 and isolating switch K2; The respective input of data collecting card described in the output termination of described voltage transformer (VT) TV1;
Described current sensor TA1 is arranged on the end opening side current return of described isolating switch K1 and isolating switch K2; The respective input of data collecting card described in the output termination of described current sensor TA1;
Positive pole+the KM connecing DC feeder suitable for reading of described isolating switch K3; Negative pole-the KM connecing DC feeder suitable for reading of described isolating switch K4; Between described shunt is connected on described isolating switch K1 end opening after connecting with timing relay and the end opening of isolating switch K2; The respective input of oscillograph card described in the output termination of described shunt;
The output terminal of described data collecting card and oscillograph card connects the respective input of described host computer respectively.
Described regulating load is the Intelligent adjustment circuit be made up of 51 type single-chip microcomputers and peripheral circuit thereof.
The model of described current sensor TA1 is SCR-100A; The model of described voltage transformer (VT) TV1 is TV1907G; The model of described data collecting card is NI USB-6000; Described shunt is 100A/75m 0.2 grade; The model of described timing relay is 3RP10; The model that the model of described oscillograph card is is PBS2012.
field condition:
1) have fixing or movable distribution board, switchboard is provided with single-phase 220V and exchanges output, and output power is not less than 1kW, and input has protection of automatic air switch.
2) scene has the supporting battery pack of DC power system.
the requirement of operating personnel:
1) wear safety gloves, wear safety goggles;
2) conventional hardware & tools and multimeter is carried.
Battery pack connects DC feeder by DC bus, connects the utility model at DC switch end opening to be measured; Host computer, by USB line traffic control proving installation, can carry out short-circuit calibration or estimate test, the selectivity of verification DC power system Graded coordination.Test process is as follows: first disconnect straight-flow system loop to be measured direct current, disconnect first to fourth isolating switch K1-K4; After checking that wiring is correct, closed first to fourth isolating switch K1-K4, then connect straight-flow system loop to be measured direct current, start carry out short-circuit calibration or estimate test; After test terminates, first disconnect first to fourth isolating switch K1-K4, then disconnect straight-flow system loop to be measured direct current.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all make within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., be all included within protection domain of the present utility model.
Claims (3)
1. a DC feeder Graded coordination proving installation, is characterized in that: comprise host computer, small area analysis estimates test cell and short circuit simulation check test unit; Described small area analysis is estimated test cell and is comprised current sensor TA1, voltage transformer (VT) TV1, data collecting card, regulating load and the first to the second isolating switch K1-K2; Described short circuit simulation check test unit comprises shunt, timing relay, oscillograph card and the 3rd to the 4th isolating switch K3-K4;
Positive pole+the KM connecing DC feeder suitable for reading of described isolating switch K1; Negative pole-the KM connecing DC feeder suitable for reading of described isolating switch K2; Between the end opening that described regulating load is connected on described isolating switch K1 and the end opening of isolating switch K2;
Described voltage transformer (VT) TV1 is connected on the two ends, end opening side of described isolating switch K1 and isolating switch K2; The respective input of data collecting card described in the output termination of described voltage transformer (VT) TV1;
Described current sensor TA1 is arranged on the end opening side current return of described isolating switch K1 and isolating switch K2; The respective input of data collecting card described in the output termination of described current sensor TA1;
Positive pole+the KM connecing DC feeder suitable for reading of described isolating switch K3; Negative pole-the KM connecing DC feeder suitable for reading of described isolating switch K4; Between described shunt is connected on described isolating switch K1 end opening after connecting with timing relay and the end opening of isolating switch K2; The respective input of oscillograph card described in the output termination of described shunt;
The output terminal of described data collecting card and oscillograph card connects the respective input of described host computer respectively.
2. a kind of DC feeder Graded coordination proving installation according to claim 1, is characterized in that: described regulating load is the Intelligent adjustment circuit be made up of 51 type single-chip microcomputers and peripheral circuit thereof.
3. a kind of DC feeder Graded coordination proving installation according to claim 2, is characterized in that: the model of described current sensor TA1 is SCR-100A; The model of described voltage transformer (VT) TV1 is TV1907G; The model of described data collecting card is NI USB-6000; Described shunt is 100A/75m 0.2 grade; The model of described timing relay is 3RP10; The model that the model of described oscillograph card is is PBS2012.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520144434.9U CN204462283U (en) | 2015-03-14 | 2015-03-14 | A kind of DC feeder Graded coordination proving installation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520144434.9U CN204462283U (en) | 2015-03-14 | 2015-03-14 | A kind of DC feeder Graded coordination proving installation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204462283U true CN204462283U (en) | 2015-07-08 |
Family
ID=53669152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520144434.9U Active CN204462283U (en) | 2015-03-14 | 2015-03-14 | A kind of DC feeder Graded coordination proving installation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204462283U (en) |
Cited By (2)
| 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 |
| CN110824349A (en) * | 2019-11-20 | 2020-02-21 | 国网宁夏电力有限公司电力科学研究院 | DC protection electrical apparatus level difference cooperation detecting system |
-
2015
- 2015-03-14 CN CN201520144434.9U patent/CN204462283U/en active Active
Cited By (2)
| 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 |
| CN110824349A (en) * | 2019-11-20 | 2020-02-21 | 国网宁夏电力有限公司电力科学研究院 | DC protection electrical apparatus level difference cooperation detecting system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Mirsaeidi et al. | Progress and problems in micro-grid protection schemes | |
| CN102608495B (en) | Fault phase selection method based on current break variable | |
| CN203981788U (en) | A kind of photovoltaic combining inverter automatic detection device | |
| WO2013131392A1 (en) | Dc power supply dynamic simulation system and dc power supply test system | |
| CN106856332A (en) | A kind of distributed photovoltaic power generation grid-connected system | |
| CN106124920B (en) | Transformer neutral conductor virtual connection fault detection method | |
| CN205811530U (en) | Route protection measure and control device based on GOOSE signal | |
| CN202453445U (en) | Testing device for stage difference coordination of transformer substation direct-current system | |
| CN204462283U (en) | A kind of DC feeder Graded coordination proving installation | |
| Ogden et al. | Impacts of distributed generation on low-voltage distribution network protection | |
| CN204375298U (en) | Demarcation switch Simulated training device | |
| CN104124916A (en) | Power grid fault simulation test system movement detection device for high-altitude photovoltaic power station | |
| CN204089727U (en) | High aititude photovoltaic plant electric network fault simulated testing system mobile detection apparatus | |
| CN202748425U (en) | Residual current protection uninterrupted testing device | |
| CN204462350U (en) | Photovoltaic combining inverter low voltage crossing and island effect comprehensive detection device | |
| CN110912102A (en) | Low-voltage power supply network leakage fault protection method based on zero phase transfer | |
| CN102290861A (en) | Intelligent modular comprehensive terminal protector | |
| CN102981121B (en) | Wind turbine generator set mobile type low voltage crossing test unit theft-resistant link chain and implementation method | |
| CN106370974B (en) | Small current earthing wire-selecting and positioning device and method based on uncompensated load injection | |
| CN204992580U (en) | Expanded not repeated fixed measuring equipment of dual power supply | |
| CN203911498U (en) | Distributed photovoltaic grid-connected protective equipment | |
| CN204314645U (en) | A kind of low-voltage distribution system by screen break-make automaton | |
| CN204333937U (en) | Detect the intellectualized detection device based on the intellectualized switchgear one-phase ground protection function of 10kV isolated neutral distribution network systems | |
| CN202363981U (en) | Integrated protector for smart grid terminal | |
| CN206712478U (en) | A kind of distributed photovoltaic power generation grid-connected system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |