Power system temporary overvoltage monitoring system

A transient overvoltage and power system technology, applied in the direction of measuring current/voltage, measuring devices, measuring electrical variables, etc., can solve the problem that the data acquisition rate and frequency response cannot be satisfied, cannot solve the problem of large-capacity data storage and transmission, and has no With reliable and perfect communication functions and other issues, achieve high data acquisition rate and frequency response, shorten fault judgment time, improve power supply quality and safety and reliability

Inactive Publication Date: 2015-12-09
SHANGHAI JUNSHI ELECTRICAL TECH +1
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Problems solved by technology

[0007] The existing transient overvoltage monitoring system has one or another deficiency, such as: it cannot solve the problem of large-capacity data storage and transmission, does not have a reliable and perfect communication function, and the data acquisition rate and frequency response cannot meet the requirements of the existing technology. Require

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  • Power system temporary overvoltage monitoring system
  • Power system temporary overvoltage monitoring system
  • Power system temporary overvoltage monitoring system

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Embodiment Construction

[0033] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0034] Such as figure 1 As shown, it is a structural block diagram of an embodiment of the power system transient overvoltage monitoring system of the present invention, the system includes a weakly damped equipotential shielded capacitive voltage divider 1, a signal conditioning circuit 2, a data acquisition module 3 and an industrial computer 4 ;in:

[0035] The weakly damped equipotential shielded capacitive voltage divider 1 obtains the voltage signal of the power system, and the voltage sign...

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Abstract

The invention provides a power system temporary overvoltage monitoring system, which comprises a weak damping equipotential shielding-type capacitive voltage divider, a signal conditioning circuit, a data acquisition module and an industrial control computer, wherein the weak damping equipotential shielding-type capacitive voltage divider acquires voltage signals of the power system and outputs the signals to the signal conditioning circuit; the signal conditioning circuit conditions the voltage signals to signals suitable for the data acquisition module; the data acquisition module carries out multichannel synchronous A / D conversion on the voltage signals after being conditioned by the signal conditioning circuit, and the converted digital signals enter the industrial control computer via a communication interface; and the industrial control computer processes signals acquired by the data acquisition module for realizing online monitoring, offline analysis and remote access and control on the power system temporary overvoltage. A temporary overvoltage response can be built; and after equipment is subjected to lightning strike and other temporary overvoltage damages, the system records related data, the data serve as a damage judgment basis, and correct insulated matching is realized.

Description

technical field [0001] The invention relates to a voltage monitoring system in a power system, in particular to a power system transient overvoltage monitoring system. Background technique [0002] The transient phenomenon is manifested as the transition from one stable state to another, and it can also be said that the system changes from one energy distribution method to another energy distribution method. In power systems, the most prominent disturbances that cause transient phenomena are tripping of a circuit breaker or a switching device, short circuits, ground faults, or lightning strikes. Power system overvoltage is a transient phenomenon of abnormal voltage rise that exceeds the normal operating voltage in the power system under certain conditions. The types of power system overvoltages can be divided into two types from the root cause, namely external overvoltages and internal overvoltages. [0003] Foreign overvoltage online monitoring systems generally adopt a d...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/165G01R31/08
Inventor 甘慧勇李怀军艾学智贾雅君
Owner SHANGHAI JUNSHI ELECTRICAL TECH
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