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A passive signal voltage detection method

A technology of voltage detection and detection method, which is applied in the field of distribution network, can solve the problems of undetectable distribution terminals and achieve the effect of eliminating undetectable defects

Active Publication Date: 2016-04-27
ZHUHAI XUJIZHI ELECTRIFIED WIRE NETING AUTOMATIONCO +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above problems, the purpose of the present invention is to provide a passive signal voltage detection method to solve the problem that the power distribution terminal cannot detect the instantaneous voltage or residual voltage in the section without power, so as to realize automatic fault isolation. Eliminate defects

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Embodiment Construction

[0015] The invention adopts a passive voltage detection method, and installs a voltage detection circuit and an action memory device on the power board of the power distribution terminal, which can effectively identify the instantaneous voltage or residual voltage in the non-energized section, and after identification , to isolate the faulty section.

[0016] refer to figure 1 As shown in the circuit diagram of the voltage detection circuit, when detecting instantaneous voltage or residual voltage, two pins 5 and 6 in the figure are connected to the power supply for receiving input voltage, pins 7 and 8 are connected to the action memory device, pins 3 and 10 are grounded, and pins 1 and 2 are connected to the power supply. , 2, 4 are three auxiliary feet. Integrated circuit IC1 has three corners 1, 2, and 3. When the input voltage of pin 1 of IC1 is less than 4.25V, the triode inside IC1 is turned on, and the high level introduced by pins 5, 6, and 7 is grounded through IC1;...

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Abstract

The invention discloses a passive signal voltage detection method. The passive signal voltage detection method includes a voltage detection circuit and an action memorizing device which is connected with the voltage detection circuit, wherein the voltage detection circuit can receive instantaneous voltage or residual voltage to generate input signals, and the input signals drive the action memorizing device to keep the action memorizing device in an action memorizing state. A processor connected with the action memorizing device identifies the action memorizing state to detect the instantaneous voltage and the residual voltage of the circuits of non-powered sections and isolate failure sections.

Description

technical field [0001] The invention relates to the technical field of distribution network, in particular to a passive signal voltage detection method. Background technique [0002] With the major changes in the modern power system and the implementation of an open and competitive power market operation mechanism, some power system quality problems often occur, especially the line voltage fault problem in the power distribution system, which has aroused domestic and foreign power workers and related users. of high attention. [0003] In the power distribution system, when a permanent fault occurs on the line, the outgoing line protection will act, and after a certain time limit, the reclosing action will occur. When the fault is reclosed or the fault is manually closed, the protection relay will accelerate and trip. The voltage characteristics shown are several The voltage of the cycle, then disappears, and the voltage that appears has obvious fault characteristics, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
Inventor 胡期红徐骏秦卫东
Owner ZHUHAI XUJIZHI ELECTRIFIED WIRE NETING AUTOMATIONCO
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