CN202502136U - Measuring device for induced voltage and induced current of AC line - Google Patents

Measuring device for induced voltage and induced current of AC line Download PDF

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Publication number
CN202502136U
CN202502136U CN2012201244387U CN201220124438U CN202502136U CN 202502136 U CN202502136 U CN 202502136U CN 2012201244387 U CN2012201244387 U CN 2012201244387U CN 201220124438 U CN201220124438 U CN 201220124438U CN 202502136 U CN202502136 U CN 202502136U
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China
Prior art keywords
alternating current
induced voltage
voltage
current circuit
divider
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Active
Application number
CN2012201244387U
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Chinese (zh)
Inventor
郭森
傅晨钊
张嘉旻
高凯
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Municipal Electric Power Co
East China Power Test and Research Institute Co Ltd
Original Assignee
Shanghai Municipal Electric Power Co
East China Power Test and Research Institute Co Ltd
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Priority to CN2012201244387U priority Critical patent/CN202502136U/en
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Publication of CN202502136U publication Critical patent/CN202502136U/en
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Abstract

The utility model relates to a measuring device for an induced voltage and an induced current of an AC line. The measuring device is connected with a ground switch of the AC line, and comprises a electrostatic voltmeter, a resistance-capacitance divider, a clamp type ammeter and a data recorder, wherein the resistance-capacitance divider is connected between the ground and a high-voltage wiring board of the ground switch of the AC line, the electrostatic voltmeter is connected at two ends of the resistance-capacitance divider in parallel, the clamp type ammeter is connected with a ground wire of the ground switch of the AC line, and the resistance-capacitance divider and the clamp type ammeter are connected with the data recorder. Compared with the prior art, the measuring device of the utility model has the advantages of high reliability, high measurement accuracy, good anti-interference performance, and the like.

Description

Alternating current circuit induced voltage and induction current measurement mechanism
Technical field
The utility model relates to a kind of voltage, current measuring device, especially relates to a kind of alternating current circuit induced voltage and induction current measurement mechanism.
Background technology
Along with development of electric power industry, the 500kV power transmission and transformation system has become the backbone network of China's electric system, but resource is quite nervous in the area that are fairly developed economically, and the circuit corridor is deficient day by day, has seriously restricted power grid construction.For solving this conspicuous contradiction, reduce unit capacity circuit cost, common-tower double-return road even multiloop transmission of electricity scheme are extensively adopted.
Yet the double circuit line wiring on the same tower makes between lead coupling coefficient increase, between lead and the lead, all have stronger EM coupling and electrostatic coupling between lead and the earth.When a loop line road is normally moved, during the interruption maintenance of another loop line road because electrostatic induction and electromagnetic induction effect between two back transmission lines, can generation induced voltage and induction current in the maintenance loop.Induced voltage and faradic size can directly influence the maintenance and the operation of circuit, also maybe the staff's that overhauling safety be worked the mischief, and the operation to grounding switch simultaneously brings adverse influence.Accurately induced voltage on the measuring circuit and induction current all play a very important role with operation to the safety inspection of circuit.The faradic device of existing measurement common-tower double-return road transmission line of electricity induced voltage all exists deficiency and defective more or less, and, data-signal not high like reliability is interfered or the like easily.
Summary of the invention
The purpose of the utility model is exactly for the defective that overcomes above-mentioned prior art existence alternating current circuit induced voltage and the induction current measurement mechanism that a kind of reliability is high, measuring accuracy is high, anti-interference is good to be provided.
The purpose of the utility model can realize through following technical scheme: a kind of alternating current circuit induced voltage and induction current measurement mechanism; This device is connected with the grounding switch of alternating current circuit; Comprise electrostatic voltmeter, RC divider, clamp on amperemeter and datalogger; Described RC divider is connected between the high-voltage connection plate and ground of alternating current circuit grounding switch; Described electrostatic voltmeter is connected in parallel on the RC divider two ends, and described clamp on amperemeter is connected on the ground wire of alternating current circuit grounding switch, and described RC divider all is connected with datalogger with clamp on amperemeter.
Described datalogger is located on the insulated platform.
Described insulated platform is provided with the uninterrupted power source into the datalogger power supply.
Described datalogger is the transient state oscillograph.
Described electrostatic voltmeter is that range is the voltage table of 0-35kV.
Described RC divider is that range is 0-100kV, the voltage divider of 50Hz high voltage variable than 2500: 1.
Described clamp on amperemeter is the reometer of range effective value 0-1000A, peak point current 2000A, MWV 650V.
Described uninterrupted power source is the power supply of the 1h that can supply power continuously at least.
Compared with prior art, induced voltage and induction current in the alternating current circuit are accurately measured in the cooperation of the utility model through electrostatic voltmeter, RC divider and clamp on amperemeter, for the safe and reliable maintenance and the operation of circuit provides strong foundation.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Embodiment 1
As shown in Figure 1; A kind of alternating current circuit induced voltage and induction current measurement mechanism; This device is connected with the grounding switch 7 of alternating current circuit, comprises electrostatic voltmeter 1, RC divider 2, clamp on amperemeter 3 and datalogger 4, and RC divider 2 is connected between the high-voltage connection plate and ground of alternating current circuit grounding switch 7; Electrostatic voltmeter 1 is connected in parallel on RC divider 2 two ends; Clamp on amperemeter 3 is connected on the ground wire of alternating current circuit grounding switch 7, and RC divider 2 all is connected with datalogger 4 with clamp on amperemeter 3, and datalogger 4 is located on the insulated platform 6.
Electrostatic voltmeter 1 selected range 0-35kV reads induced voltage stable state numerical value.
RC divider 2 selected range 0-100kV, the 50Hz high voltage variable was than 2500: 1.Through laboratory measurement, its 100us sonic bang voltage change ratio 2566: 1 considers that by 2500: 1 voltage error is less than<3%; Its 100us sonic bang voltage once overlaps with the secondary waveform time, and time error can be ignored.An electric capacity 260pF (actual measurement) of this RC divider, a resistance 462M Ω (180k Ω * 2500).
The reometer of clamp on amperemeter 3 selected range effective value 0-1000A, peak point current 2000A, MWV 650V, in the actual measurement range have * 1, * 10, * 100mV/A third gear can be selected according to actual conditions.
Datalogger 4 is selected Nicolet transient state oscillograph for use, and its sampling rate is 200kHz, adopts operation to trigger in advance.
For guaranteeing the potential safety of detection system, itself and earth potential are isolated, adopt 5 power supplies of UPS uninterrupted power source, this power supply possesses the above ability of continuous power supply 1h.
Embodiment 2
As shown in Figure 2; A kind of alternating current circuit induced voltage and induction current measurement mechanism; This device is used to detect station, 500kV Far East new clothes far defends 5136 circuits, measure and to relate to that 5136 circuits and grounding switch are far defended in station, the Far East, the 500kV booth is defended the station and far defended 5136 line-to-ground switches.
The step that adopts above-mentioned measurement mechanism to measure is following:
(1) measure under the line-to-ground condition:
1) induced voltage and the faradic stable state waveform of station, the Far East side under the 5136 two-terminal-grounding conditions far defended in record;
2) draw back station, Far East grounding switch, record induced voltage and faradic transient waveform and stable state waveform;
3) station, the Far East grounding switch that closes, record induced voltage and faradic transient waveform and stable state waveform;
4) triggering of adjustment instrument and parameter are arranged to optimum condition, require voltage range suitable, and reliable trigger is more than the sampling rate 200K;
5) repeat station, above-mentioned switching Far East grounding switch 5 times;
6) finally station, Far East grounding switch is a "on" position.
(2) measure under the earth-free condition of circuit:
1) draws back booth and defend station 5136 line grounding switches, record station, Far East side induced voltage and faradic transient waveform;
2) draw back station, Far East grounding switch, write down induced voltage and faradic transient waveform and far defend the stable state waveform under the earth-free condition in 5136 line two ends;
3) station, the Far East grounding switch that closes, record induced voltage and faradic transient waveform and stable state waveform;
4) triggering of adjustment instrument and parameter are arranged to optimum condition, require voltage range suitable, and reliable trigger is more than the sampling rate 200K;
5) repeat station, above-mentioned switching Far East grounding switch 5 times;
6) final booth is defended the station, station, the Far East 5136 line-to-ground switches recover "on" position.

Claims (8)

1. alternating current circuit induced voltage and induction current measurement mechanism; This device is connected with the grounding switch of alternating current circuit; It is characterized in that; Comprise electrostatic voltmeter, RC divider, clamp on amperemeter and datalogger, described RC divider is connected between the high-voltage connection plate and ground of alternating current circuit grounding switch, and described electrostatic voltmeter is connected in parallel on the RC divider two ends; Described clamp on amperemeter is connected on the ground wire of alternating current circuit grounding switch, and described RC divider all is connected with datalogger with clamp on amperemeter.
2. a kind of alternating current circuit induced voltage according to claim 1 and induction current measurement mechanism is characterized in that described datalogger is located on the insulated platform.
3. a kind of alternating current circuit induced voltage according to claim 2 and induction current measurement mechanism is characterized in that, described insulated platform is provided with the uninterrupted power source into the datalogger power supply.
4. a kind of alternating current circuit induced voltage according to claim 2 and induction current measurement mechanism is characterized in that, described datalogger is the transient state oscillograph.
5. a kind of alternating current circuit induced voltage according to claim 1 and induction current measurement mechanism is characterized in that, described electrostatic voltmeter is that range is the voltage table of 0-35kV.
6. a kind of alternating current circuit induced voltage according to claim 1 and induction current measurement mechanism is characterized in that, described RC divider is that range is 0-100kV, the voltage divider of 50Hz high voltage variable than 2500: 1.
7. a kind of alternating current circuit induced voltage according to claim 1 and induction current measurement mechanism is characterized in that, described clamp on amperemeter is the reometer of range effective value 0-1000A, peak point current 2000A, MWV 650V.
8. a kind of alternating current circuit induced voltage according to claim 3 and induction current measurement mechanism is characterized in that, described uninterrupted power source is the power supply of the 1h that can supply power continuously at least.
CN2012201244387U 2012-03-29 2012-03-29 Measuring device for induced voltage and induced current of AC line Active CN202502136U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012201244387U CN202502136U (en) 2012-03-29 2012-03-29 Measuring device for induced voltage and induced current of AC line

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Application Number Priority Date Filing Date Title
CN2012201244387U CN202502136U (en) 2012-03-29 2012-03-29 Measuring device for induced voltage and induced current of AC line

Publications (1)

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CN202502136U true CN202502136U (en) 2012-10-24

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105785130A (en) * 2016-03-21 2016-07-20 国家电网公司 High-voltage line induced voltage and direct-current resistance measuring device
CN106383259A (en) * 2016-09-06 2017-02-08 广东电网有限责任公司江门供电局 Induced current and inducted voltage measurement method of multi-circuit transmission lines on same tower
CN109932532A (en) * 2019-03-18 2019-06-25 国网内蒙古东部电力有限公司电力科学研究院 One kind being used for line influence electric test platform and method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105785130A (en) * 2016-03-21 2016-07-20 国家电网公司 High-voltage line induced voltage and direct-current resistance measuring device
CN106383259A (en) * 2016-09-06 2017-02-08 广东电网有限责任公司江门供电局 Induced current and inducted voltage measurement method of multi-circuit transmission lines on same tower
CN109932532A (en) * 2019-03-18 2019-06-25 国网内蒙古东部电力有限公司电力科学研究院 One kind being used for line influence electric test platform and method

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