Live testing system for electrical equipment

A live test and electrical equipment technology, applied in the direction of measuring current/voltage, measuring resistance/reactance/impedance, measuring electricity, etc., can solve the problems of large one-time investment, large investment, and high cost of the online monitoring system, and achieve the prevention of frequency spectrum Leakage, strong versatility, and investment-saving effects

Inactive Publication Date: 2010-02-03
STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST +1
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Problems solved by technology

However, the one-time investment in the installation of the online monitoring system is quite large. For a large number of 110kv voltage level substations, this is an excessive investment. On average, there are more than 30 substations in each prefecture-level city, all of which are equipped with online monitoring systems. Excessive investment, often tens of millions of yuan, is a high-cost operation that no enterprise wants to see

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  • Live testing system for electrical equipment

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Embodiment Construction

[0017] See figure 1 A specific embodiment of the electrical equipment live test system of the present invention is shown. The sensor 1 of this embodiment adopts the 70mA / 3.5V JS06-1 type through-core ultra-microcrystalline sensor produced by China Hunan Huicui Electric Power Technology Co., Ltd. or 5mA / 3.5V JS06-2 impedance sensor. The 500mA / 3.5V JS06-3 sensor or the 1500mA / 3.5V JS06-4 sensor produced by the company can also be used. The output terminal of the sensor 1 is connected to the input terminal of the A / D acquisition chip 2. The sensor 1 is responsible for converting the measured signal into a 3.5V AC signal and sending it to the A / D acquisition chip 2; the A / D acquisition chip 2 adopts the MAX197 acquisition chip produced by the American MAX company. The A / D acquisition chip 2 is connected to the input terminal of the single chip microcomputer 3 from its output terminal. The A / D acquisition chip 2 is responsible for converting analog signals into digital signals an...

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Abstract

The invention discloses a live testing system for electrical equipment, which consists of a sensor (1), an A / D acquisition chip (2), a single chip (3) and a computer (4). An output end of the sensor (1) is connected with an input end of the A / D acquisition chip (2); the A / D acquisition chip (2) is connected with an input end of the single chip (3) through an output end of the A / D acquisition chip;and the single chip (3) is connected to an input end of the computer (4) through a 485 bus. Voltage and current signals are converted into signals in a sampling range of the acquisition chip by the sensor (1) to be synchronously acquired in eight channels, so the system realizes synchronous relative dielectric loss measurement by using the fiber / bus synchronization technology. The system can carry out live testing for the electrical equipment synchronously for a plurality of transformer stations, has less investment and strong generality, also can carry out longitudinal and transverse comparison, and has strong capacity of resisting disturbance and high calculating precision.

Description

Technical field [0001] The invention belongs to the technical field of power engineering equipment, and particularly relates to a live test system for electrical equipment. Background technique [0002] In order to grasp the operating status of electrical equipment in real time, an online monitoring system for electrical equipment is currently being used for large hub substations with voltage levels of 220kV and above, in order to obtain higher output benefits. However, the one-time investment in the installation of the online monitoring system is quite large. For the large number of 110kv substations, this is an excessive investment. On average, there are more than 30 in each prefecture-level city, all of which are installed with online monitoring systems. Excessive investment, tens of millions of yuan at every turn, is a high-cost operation that no enterprise wants to see. Summary of the invention [0003] The technical problem to be solved by the present invention is to provid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R19/00G01R27/26
Inventor 陆佳政方针张红先李波
Owner STATE GRID HUNAN ELECTRIC POWER CO LTD ELECTRIC POWER SCI RES INST
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