CN105974306A - Intelligent test device, system and test method for oscillating characteristic of direct current breaker - Google Patents
Intelligent test device, system and test method for oscillating characteristic of direct current breaker Download PDFInfo
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- CN105974306A CN105974306A CN201610500586.7A CN201610500586A CN105974306A CN 105974306 A CN105974306 A CN 105974306A CN 201610500586 A CN201610500586 A CN 201610500586A CN 105974306 A CN105974306 A CN 105974306A
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- circuit breaker
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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Abstract
The invention discloses an intelligent test device, system and test method for the oscillating characteristic of a direct current breaker. The test device comprises a direct current adjustable stabilized voltage supply, a current detection unit, a data acquisition and processing unit, a direct current power supply air switch K1 and a voltage test air switch K2, wherein the output end of the direct current adjustable stabilized voltage supply is connected in series with the direct current power supply air switch K1 and then used as a power output end, one end of the voltage test air switch K2 is connected in parallel with the power output end while the other end is connected with the data acquisition and processing unit, and the output end of the current detection unit is connected with the data acquisition and processing unit; the test system comprises the test device and the direct current breaker; and the test method comprises the steps of charging a capacitor of the direct current breaker, then analyzing the oscillating characteristic according to the voltage or current and outputting the analysis result, thereby realizing automatic reading of data and automatic calculation of results. The device, the system and the method are high in detection sensitivity, low in implementation cost and high in detection efficiency, and can record detected data in real time, realize automatic detection of data, relieve the workload of site detection and provide multiple detection modes for users to select.
Description
Technical field
The present invention relates to electric power project engineering field, be specifically related to a kind of dc circuit breaker oscillating characteristic intelligent test device, system and method for testing.
Background technology
Dc circuit breaker is as the visual plant of current conversion station conversion DC current, and the ability of its conversion DC current is to consider a highly important factor of dc circuit breaker performance.Owing to DC current is without zero crossing, therefore dc circuit breaker needs DC current " artificial zero passage " when changing DC current, the principle of dc circuit breaker conversion DC current is at regular alternating current chopper parallel connection LC oscillation circuit, during chopper deciliter, LC oscillation circuit generation oscillating current is applied to chopper two ends and forces breaker fracture two ends current over-zero, thus reaches the purpose of disjunction.At present, once there is the case of DC current convert failed in domestic many current conversion stations, and the oscillating characteristic of dc circuit breaker is the most gradually paid attention to by State Grid Corporation of China and Southern Power Grid Company.
At present when dc circuit breaker commissioning test, frequently with DC source and the oscillating characteristic of oscilloscope measurement dc circuit breaker, there is no set of instrument and equipment, oscillograph is typically expensive, not readily portable and Data Management Analysis, and cannot real time record detection waveform, therefore need badly design a kind of set of portable set, be applied to Site Detection.
Summary of the invention
The technical problem to be solved in the present invention: for the problems referred to above of prior art, there is provided a kind of detection sensitivity high, can real time record detection data, realize the detection automatically to data, implementation cost is low, alleviate Site Detection workload, detection efficiency is high, can provide dc circuit breaker oscillating characteristic intelligent test device, system and method for testing that Through Several Survey Measure selects for user.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is:
The present invention provides a kind of dc circuit breaker oscillating characteristic intelligent test device, including direct current adjustable stabilized voltage supply, current detecting unit, data acquisition and processing unit, DC source sky leaves K1 and voltage tester sky opens K2, the outfan concatenation DC source sky of described direct current adjustable stabilized voltage supply leaves after K1 as power output end, described voltage tester sky opens K2 one end and power output end is in parallel, the other end is connected with the voltage detecting input of data acquisition and processing unit, the outfan of described current detecting unit is connected with the current sense input of data acquisition and processing unit.
Preferably, described current detecting unit includes that the outfan of Luo-coil and DC current transformer, described Luo-coil and the DC current transformer current sense input respectively with data acquisition and processing unit is connected.
The present invention also provides for a kind of dc circuit breaker oscillating characteristic intelligent test system, including dc circuit breaker oscillating characteristic intelligent test device and be test for dc circuit breaker, described dc circuit breaker oscillating characteristic intelligent test device is aforesaid dc circuit breaker oscillating characteristic intelligent test device, described dc circuit breaker includes the spark gap branch road being connected in parallel, chopper branch road and vibration branch road, it is serially connected with spark gap on described spark gap branch road, it is serially connected with chopper on described chopper branch road, inductance L and capacitor C it is serially connected with on described vibration branch road, capacitor C two ends on the power output end of described dc circuit breaker oscillating characteristic intelligent test device and vibration branch road are connected in parallel, described current detecting unit is arranged on chopper branch road.
The present invention also provides for the method for testing of a kind of aforementioned dc circuit breaker oscillating characteristic intelligent test system, and step includes:
1) chopper being test in dc circuit breaker is disconnected, it is connected to the power output end of dc circuit breaker oscillating characteristic intelligent test device be test in dc circuit breaker the capacitor C on branch road that vibrates, the DC source sky that closes is opened K1 and is charged to capacitor C, disconnect DC source sky after charging complete and open K1, sealing voltage test sky opens K2, close the chopper being test in dc circuit breaker so that is test for chopper branch road and vibration branch road in dc circuit breaker and forms oscillation circuit；
2) sealing voltage test sky opens K2, close the chopper being test in dc circuit breaker, the voltage at sensing capacitor C two ends, gathers the voltage at capacitor C two ends, calculates the oscillating characteristic parameter of the oscillation circuit being test for dc circuit breaker according to the voltage curve at capacitor C two ends；Or it is test for the electric current of the oscillation circuit of dc circuit breaker by current detecting unit collection, calculates the oscillating characteristic parameter of the oscillation circuit being test for dc circuit breaker according to the current curve of oscillation circuit.
Preferably, described oscillating characteristic parameter includes at least one in frequency of vibration, time constant, loop inductance and damping resistance.
Dc circuit breaker oscillating characteristic intelligent test device of the present invention and system have an advantage that
null1、The present invention includes direct current adjustable stabilized voltage supply、Current detecting unit、Data acquisition and processing unit、DC source sky leaves K1 and voltage tester sky opens K2，The outfan concatenation DC source sky of direct current adjustable stabilized voltage supply leaves after K1 as power output end，Voltage tester sky opens K2 one end and power output end is in parallel、The other end is connected with the voltage detecting input of data acquisition and processing unit，The outfan of described current detecting unit is connected with the current sense input of data acquisition and processing unit，Therefore, it is possible to replace the expensive oscillograph currently used，Can on-the-spot read test data automatically，Manual read is avoided to fetch data the error caused，Automatically output dc circuit breaker oscillating characteristic test result，Site Detection can be conveniently used in，Detection sensitivity is high、Can real time record detection data，Realize data shows output in real time，Reduce cost，Alleviate Site Detection workload，There is accuracy of measurement high、Good portability、The advantage that testing efficiency is high.
2, the present invention includes direct current adjustable stabilized voltage supply, current detecting unit, data acquisition and processing unit, the outfan concatenation DC source sky of direct current adjustable stabilized voltage supply leaves after K1 as power output end, can select to have amplified dc circuit breaker oscillating characteristic according to voltage or electric current as required and test and export dc circuit breaker oscillating characteristic test result, flexibly and easily, and different dc circuit breaker oscillating characteristic method of testings can realize being mutually authenticated, facilitate Site Detection, it is achieved testing result contrast and self-inspection.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention test system.
Detailed description of the invention
See Fig. 1, the dc circuit breaker oscillating characteristic intelligent test device of the present embodiment includes that direct current adjustable stabilized voltage supply 1, current detecting unit 2, data acquisition and processing unit 3, DC source sky open K1 and voltage tester sky opens K2, the outfan concatenation DC source sky of direct current adjustable stabilized voltage supply 1 leaves after K1 as power output end, voltage tester sky is opened K2 one end and is connected with the voltage detecting input of data acquisition and processing unit 3 with power output end parallel connection, the other end, and the outfan of current detecting unit 2 is connected with the current sense input of data acquisition and processing unit 3.
Seeing Fig. 1, the current detecting unit 2 of the present embodiment includes that the outfan of Luo-coil 21 and DC current transformer 22, Luo-coil 21 and DC current transformer 22 current sense input respectively with data acquisition and processing unit 3 is connected.
As shown in Figure 1, the dc circuit breaker oscillating characteristic intelligent test system of the present embodiment includes dc circuit breaker oscillating characteristic intelligent test device and is test for dc circuit breaker 4, dc circuit breaker oscillating characteristic intelligent test device is the dc circuit breaker oscillating characteristic intelligent test device of claim 1 or 2, dc circuit breaker 4 includes the spark gap branch road being connected in parallel, chopper branch road and vibration branch road, spark gap 41 it is serially connected with on spark gap branch road, chopper 42 it is serially connected with on chopper branch road, it is serially connected with inductance L and capacitor C on vibration branch road, capacitor C two ends on the power output end of dc circuit breaker oscillating characteristic intelligent test device and vibration branch road are connected in parallel, current detecting unit 2 is arranged on chopper branch road.
The step of the method for testing of the present embodiment dc circuit breaker oscillating characteristic intelligent test system includes:
1) chopper 42 being test in dc circuit breaker 4 is disconnected, it is connected to the power output end of dc circuit breaker oscillating characteristic intelligent test device be test in dc circuit breaker 4 the capacitor C on branch road that vibrates, the DC source sky that closes is opened K1 and is charged to capacitor C, disconnect DC source sky after charging complete and open K1, sealing voltage test sky opens K2, close the chopper 42 being test in dc circuit breaker 4 so that is test for chopper branch road and vibration branch road in dc circuit breaker 4 and forms oscillation circuit；
2) sealing voltage test sky opens K2, close the chopper 42 being test in dc circuit breaker 4, the voltage at sensing capacitor C two ends, gathers the voltage at capacitor C two ends, calculates the oscillating characteristic parameter of the oscillation circuit being test for dc circuit breaker 4 according to the voltage curve at capacitor C two ends；Or gathered the electric current being test for dc circuit breaker 4 oscillation circuit by current detecting unit 2, calculate the oscillating characteristic parameter of the oscillation circuit being test for dc circuit breaker 4 according to the current curve of oscillation circuit.
In the present embodiment, owing to current detecting unit 2 includes Luo-coil 21 and DC current transformer 22, therefore step 2) in gathered when being test for the electric current of dc circuit breaker 4 oscillation circuit by current detecting unit 2, both the testing current method that directly gathers can have been used, Luo-coil 21 is arranged on test specimen return wire, the curent change of test oscillation circuit；Can also use and indirectly gather current method, DC current transformer signal 22 is connected to DC current transformer secondary terminals, the curent change situation of test oscillation circuit.Therefore, test system in the present embodiment provides 3 kinds of method of testings, may select one or more in 3 kinds during detection, can select voluntarily according to on-site actual situations, may be used without three kinds of methods to detect simultaneously, contrast three kinds of method detection data, be mutually authenticated, facilitate Site Detection, it is achieved testing result contrast and self-inspection.In the present embodiment, oscillating characteristic parameter includes at least one in frequency of vibration, time constant, loop inductance and damping resistance.It should be noted that frequency of vibration, time constant, loop inductance and damping resistance are the conventional parameter of oscillating characteristic, therefore its most reinflated explanation of concrete computational methods.In the present embodiment, data acquisition and processing unit 3 include interconnective A/D data acquisition module and microprocessor, and the computer of external A/D data collecting card can also be used in addition as required to realize.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-described embodiment, and all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that, for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (5)
1. a dc circuit breaker oscillating characteristic intelligent test device, it is characterized in that: include direct current adjustable stabilized voltage supply (1), current detecting unit (2), data acquisition and processing unit (3), DC source sky leaves K1 and voltage tester sky opens K2, the outfan concatenation DC source sky of described direct current adjustable stabilized voltage supply (1) leaves after K1 as power output end, described voltage tester sky opens K2 one end and power output end is in parallel, the other end is connected with the voltage detecting input of data acquisition and processing unit (3), the outfan of described current detecting unit (2) is connected with the current sense input of data acquisition and processing unit (3).
Dc circuit breaker oscillating characteristic intelligent test device the most according to claim 1, it is characterized in that: described current detecting unit (2) includes that the outfan of Luo-coil (21) and DC current transformer (22), described Luo-coil (21) and DC current transformer (22) current sense input respectively with data acquisition and processing unit (3) is connected.
3. a dc circuit breaker oscillating characteristic intelligent test system, it is characterized in that: include dc circuit breaker oscillating characteristic intelligent test device and be test for dc circuit breaker (4), described dc circuit breaker oscillating characteristic intelligent test device is the dc circuit breaker oscillating characteristic intelligent test device described in claim 1 or 2, described dc circuit breaker (4) includes the spark gap branch road being connected in parallel, chopper branch road and vibration branch road, spark gap (41) it is serially connected with on described spark gap branch road, chopper (42) it is serially connected with on described chopper branch road, inductance L and capacitor C it is serially connected with on described vibration branch road, capacitor C two ends on the power output end of described dc circuit breaker oscillating characteristic intelligent test device and vibration branch road are connected in parallel, described current detecting unit (2) is arranged on chopper branch road.
4. the method for testing of dc circuit breaker oscillating characteristic intelligent test system described in a claim 3, it is characterised in that step includes:
1) chopper (42) being test in dc circuit breaker (4) is disconnected, it is connected to the power output end of dc circuit breaker oscillating characteristic intelligent test device be test for the capacitor C on vibration branch road in dc circuit breaker (4), the DC source sky that closes is opened K1 and is charged to capacitor C, disconnect DC source sky after charging complete and open K1, sealing voltage test sky opens K2, close the chopper (42) being test in dc circuit breaker (4) so that is test for chopper branch road and vibration branch road in dc circuit breaker (4) and forms oscillation circuit；
2) sealing voltage test sky opens K2, close the chopper (42) being test in dc circuit breaker (4), the voltage at sensing capacitor C two ends, gather the voltage at capacitor C two ends, calculate the oscillating characteristic parameter of the oscillation circuit being test for dc circuit breaker (4) according to the voltage curve at capacitor C two ends；Or gathered the electric current being test for dc circuit breaker (4) oscillation circuit by current detecting unit (2), calculate the oscillating characteristic parameter of the oscillation circuit being test for dc circuit breaker (4) according to the current curve of oscillation circuit.
The method of testing of dc circuit breaker oscillating characteristic intelligent test system the most according to claim 4, it is characterised in that: described oscillating characteristic parameter includes at least one in frequency of vibration, time constant, loop inductance and damping resistance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610500586.7A CN105974306B (en) | 2016-06-30 | 2016-06-30 | A kind of dc circuit breaker oscillating characteristic intelligent test device, system and test method |
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| CN201610500586.7A CN105974306B (en) | 2016-06-30 | 2016-06-30 | A kind of dc circuit breaker oscillating characteristic intelligent test device, system and test method |
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| CN105974306B CN105974306B (en) | 2019-06-25 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219427A (en) * | 2017-06-27 | 2017-09-29 | 天津市滨海新区军民融合创新研究院 | Power supply circuit and electromagnetic compatibility test system |
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| DE10221826A1 (en) * | 2002-05-10 | 2003-11-20 | Ernst Slamecka | Synthetic test circuit for a high voltage alternating current power switch has test and auxiliary switches, with the auxiliary switch activated to minimize arcing during switching by preventing its use at peak current values |
| CN202041572U (en) * | 2011-03-17 | 2011-11-16 | 湖北省电力公司电力试验研究院 | Off-line detector for current of high-voltage direct current switch oscillation loop |
| CN102901925A (en) * | 2012-10-16 | 2013-01-30 | 四川电力科学研究院 | Method for testing characteristic parameter of conversion loop of direct current circuit breaker with extra and ultra-high voltage |
| CN205861857U (en) * | 2016-06-30 | 2017-01-04 | 国家电网公司 | A kind of dc circuit breaker oscillating characteristic intelligent test device and system |
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2016
- 2016-06-30 CN CN201610500586.7A patent/CN105974306B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10221826A1 (en) * | 2002-05-10 | 2003-11-20 | Ernst Slamecka | Synthetic test circuit for a high voltage alternating current power switch has test and auxiliary switches, with the auxiliary switch activated to minimize arcing during switching by preventing its use at peak current values |
| CN202041572U (en) * | 2011-03-17 | 2011-11-16 | 湖北省电力公司电力试验研究院 | Off-line detector for current of high-voltage direct current switch oscillation loop |
| CN102901925A (en) * | 2012-10-16 | 2013-01-30 | 四川电力科学研究院 | Method for testing characteristic parameter of conversion loop of direct current circuit breaker with extra and ultra-high voltage |
| CN205861857U (en) * | 2016-06-30 | 2017-01-04 | 国家电网公司 | A kind of dc circuit breaker oscillating characteristic intelligent test device and system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107219427A (en) * | 2017-06-27 | 2017-09-29 | 天津市滨海新区军民融合创新研究院 | Power supply circuit and electromagnetic compatibility test system |
| CN107219427B (en) * | 2017-06-27 | 2023-08-04 | 天津市滨海新区军民融合创新研究院 | Power supply circuit and electromagnetic compatibility test system |
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