CN203561715U - Power distribution network electric leakage signal on-line detection device - Google Patents

Power distribution network electric leakage signal on-line detection device Download PDF

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Publication number
CN203561715U
CN203561715U CN201320628579.7U CN201320628579U CN203561715U CN 203561715 U CN203561715 U CN 203561715U CN 201320628579 U CN201320628579 U CN 201320628579U CN 203561715 U CN203561715 U CN 203561715U
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CN
China
Prior art keywords
power distribution
electric leakage
distribution network
leakage signal
network electric
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.)
Expired - Fee Related
Application number
CN201320628579.7U
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Chinese (zh)
Inventor
陈世忠
付刚
陈会玲
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.)
Henan Kaiqi Power Industry Co Ltd
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Henan Kaiqi Power Industry Co Ltd
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Priority to CN201320628579.7U priority Critical patent/CN203561715U/en
Application granted granted Critical
Publication of CN203561715U publication Critical patent/CN203561715U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to a power distribution network electric leakage signal on-line detection device which comprises current transformers, a single-chip microcomputer system circuit and a remote transmission unit. Two annular zero sequence current transformer sets are used. One annular zero sequence current transformer set is connected with a three-phase four-wire power supply wire. The other annular zero sequence current transformer set is connected with a grounding wire. The output ends of the two annular zero sequence current transformer sets are connected into the single-chip microcomputer system circuit which is connected with the remote transmission unit through a communication port. The power distribution network electric leakage signal on-line detection device can achieve power distribution network electric leakage signal on-line detection and uploading economically and ideally, and an auxiliary effect of a power distribution network electric leakage signal on-line detection part function can be achieved on power distribution automatic control.

Description

Power distribution network electric leakage signal on-line measuring device
Technical field
The utility model relates to a kind of power distribution network electric leakage signal pick-up unit, especially relates to a kind of power distribution network electric leakage signal on-line measuring device.
Background technology
The proposition of the new problem of power industry intelligent power network, strong promotion developing rapidly of distribution system automation control technology.And distribution system automation is controlled the realization of process, the various aspects that depend on electric system, such as the functional configuration of distribution system basic equipment, the quality of infrastructure signals collecting and transmission etc., be all directly connected to the normal stable or high-quality operation of whole distribution system.
Power distribution network generation leak current fault, is also the problem that often can occur in production reality, once power distribution network generation leak current fault will inevitably have influence on the normal operation of substation transformer, as causes Low-voltage circuit breaker switch Frequent trip, reduces power supply quality.Moreover the leak current fault that the electric leakage of distribution line phase phase line or ground connection are caused, can cause power equipment to produce overheating conventionally, causes generation equipment failure, cause damage sometimes even can to user power utilization equipment.Therefore, if can occur at first, process in time or get rid of in advance line electrical leakage fault before this phenomenon of the failure occurs or in accident, accomplish to prevent trouble before it happens, will inevitably improve distribution system power supply quality and reliability, avoid device damage.
Utility model content
The problem that the utility model proposes for background technology, proposes a kind of power distribution network electric leakage signal on-line measuring device, can realize and carry out in real time the online detection of distribution line electric leakage.
To achieve these goals, the technical scheme that the utility model adopts is:
A kind of power distribution network electric leakage signal on-line measuring device, comprise current transformer, microcontroller system circuit, teletransmission unit, described current transformer adopts two groups of annular zero sequence current mutual inductors, and one group of annular zero sequence current mutual inductor connects three-phase four-wire power line, and another group connects ground wire, the output terminal access microcontroller system circuit of described two groups of annular zero sequence current mutual inductors, described microcontroller system circuit connects teletransmission unit by PORT COM.
Described power distribution network electric leakage signal on-line measuring device, the output signal of two groups of annular zero sequence current mutual inductors accesses A/D modular converter respectively after electric resistance partial pressure, capacitor filtering shaping, and described A/D modular converter output connects microcontroller system circuit.
Described teletransmission unit adopts bidirectional transmit-receive wireless communication module, and single-chip microcomputer is connected with bidirectional transmit-receive wireless communication module by COM port, by described bidirectional transmit-receive wireless communication module, connects wireless communication base station or host computer early warning system.
The useful good effect of utility model:
1, the utility model power distribution network electric leakage signal on-line measuring device, adopt two-way current detection signal, can judge accurately the generation of power distribution network electric leakage signal, realize power distribution network electric leakage signal and detect online and upload, for realizing distribution system automation, control the booster action that will play the online test section of power distribution network electric leakage signal function.
2, the utility model power distribution network electric leakage signal on-line measuring device, adopts Signal Pretreatment and analog to digital conversion circuit, and signals collecting is accurate, and data are reliable, and operation characteristic is desirable; Line construction is simple, and cost of manufacture is low, economical and practical, easy to use.
Accompanying drawing explanation
Fig. 1 is that the utility model power distribution network electric leakage signal on-line measuring device electric leakage signal detects schematic diagram;
Fig. 2 is the utility model electric leakage signal on-line measuring device signal pre-processing circuit schematic diagram;
Fig. 3 is the utility model power distribution network electric leakage signal on-line measuring device analog-to-digital conversion module circuit theory diagrams;
Fig. 4 is the utility model power distribution network electric leakage signal on-line measuring device microcontroller system circuit schematic diagram.
Embodiment
Below by embodiment, the technical solution of the utility model is described in further detail.
embodiment 1
Referring to Fig. 1, the utility model power distribution network electric leakage signal on-line measuring device, comprise current transformer, microcontroller system circuit, teletransmission unit, described current transformer adopts two groups of annular zero sequence current mutual inductors, and three-phase four-wire power line (distribution transformer secondary output terminal) is passed to annular mutual inductor 101 simultaneously, the output terminal 102 of annular mutual inductor 101 connects microcontroller system circuit, and the neutral line of three-phase four-wire power line is directly connected to ground wire; Annular mutual inductor 201 connects ground wire, the output terminal 202 of annular mutual inductor 201 connects single chip circuit, described microcontroller system circuit connects teletransmission unit by PORT COM, and microcontroller system circuit is controlled and calculated electric leakage signal electrical quantity and output to teletransmission unit.
embodiment 2
Referring to Fig. 1~Fig. 4, the power distribution network electric leakage signal on-line measuring device of the present embodiment, as different from Example 1, adopt filtering shaping circuit to carry out pre-service to mutual inductor output signal, the output signal of two groups of annular zero sequence current mutual inductors accesses A/D modular converter respectively after resistance R 1~R9 dividing potential drop, capacitor C 1~C4 filter shape, and described A/D modular converter output connects microcontroller system circuit.
Described power distribution network electric leakage signal on-line measuring device, teletransmission unit adopts bidirectional transmit-receive wireless communication module, single-chip microcomputer is connected with bidirectional transmit-receive wireless communication module by COM port, by described bidirectional transmit-receive wireless communication module, connects wireless communication base station or host computer early warning system.
The method for making of this power distribution network electric leakage signal on-line measuring device comparatively economy, the desirable power distribution network electric leakage signal of realizing detects online and uploads, and it controls the booster action that will play the online test section of power distribution network electric leakage signal function for realizing distribution system automation.

Claims (3)

1. a power distribution network electric leakage signal on-line measuring device, comprise current transformer, microcontroller system circuit, teletransmission unit, it is characterized in that: described current transformer adopts two groups of annular zero sequence current mutual inductors, one group of annular zero sequence current mutual inductor connects three-phase four-wire power line, and another group connects ground wire, the output terminal access microcontroller system circuit of described two groups of annular zero sequence current mutual inductors, described microcontroller system circuit connects teletransmission unit by PORT COM.
2. power distribution network electric leakage signal on-line measuring device according to claim 1, it is characterized in that: the output signal of two groups of annular zero sequence current mutual inductors accesses A/D modular converter respectively after electric resistance partial pressure, capacitor filtering shaping, described A/D modular converter output connects microcontroller system circuit.
3. power distribution network electric leakage signal on-line measuring device according to claim 1 and 2, it is characterized in that: described teletransmission unit adopts bidirectional transmit-receive wireless communication module, single-chip microcomputer is connected with bidirectional transmit-receive wireless communication module by COM port, by described bidirectional transmit-receive wireless communication module, connects wireless communication base station or host computer early warning system.
CN201320628579.7U 2013-10-12 2013-10-12 Power distribution network electric leakage signal on-line detection device Expired - Fee Related CN203561715U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320628579.7U CN203561715U (en) 2013-10-12 2013-10-12 Power distribution network electric leakage signal on-line detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320628579.7U CN203561715U (en) 2013-10-12 2013-10-12 Power distribution network electric leakage signal on-line detection device

Publications (1)

Publication Number Publication Date
CN203561715U true CN203561715U (en) 2014-04-23

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Family Applications (1)

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Country Status (1)

Country Link
CN (1) CN203561715U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103513154A (en) * 2013-10-12 2014-01-15 河南开启电力实业有限公司 Power distribution network electric leakage signal on-line detection device
CN104215824A (en) * 2014-08-14 2014-12-17 河南开启电力实业有限公司 Distribution transformer neutral-conductor ground current detection warning device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103513154A (en) * 2013-10-12 2014-01-15 河南开启电力实业有限公司 Power distribution network electric leakage signal on-line detection device
CN104215824A (en) * 2014-08-14 2014-12-17 河南开启电力实业有限公司 Distribution transformer neutral-conductor ground current detection warning device

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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: 20140423

Termination date: 20161012