Temperature compensation type lightning arrester resistive current testing device and use method thereof
A technology of resistive current and temperature compensation, which is applied in the direction of measuring device, short-circuit test, and current-only measurement, can solve the test error of large resistive current, the influence of test results, and the influence of the negative temperature coefficient characteristics of the valve plate in the arrester without consideration, etc. problem, to achieve the effect of reducing the error
Active Publication Date: 2021-06-18
ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER
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[0002] Surge arresters are one of the important protection devices to ensure the safe operation of power systems. They have the characteristics of high energy absorption, stable protection performance, and low residual voltage, which can meet the insulation protection requirements of the power grid. The arrester resistive current test is an important means of detecting the insulation status of the arrester. However, because the insulation resistance of the arrester valve itself has a negative temperature coefficient, in actual testing, the temperature of the arrester itself will affect the test results of the resistive current; Large resistive current test error
[0003] The existing arrester resistive current test device does not consider the influence of the negative temperature coefficient characteristics of the valve plate in the arrester on the test, which will cause misjudgment of the arrester state
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[0029] Further description will be made in conjunction with the specific embodiments.
[0030] A temperature compensation type arrester resistant current test device, comprising: arrester resistive current test assembly 1, temperature compensation assembly 2, DC battery 3, valve press circuit 4, compensation calculation circuit 5, compensation current line 6, display circuit 7 and the resistive current output line 8, the temperature compensation assembly 2 includes: the container 21, the standard valve 22, the bottom electrode 23, the top electrode 24, the heating device, and the top cover 25, the upper end opening of the container 21 The lower end is closed, the disk-shaped bottom electrode 23 is disposed at the lower end of the container 21, the standard valve piece 22 to be provided at the upper end of the bottom electrode 23, the top electrode 24 to stamp the standard. The upper end of the valve plate 22;
[0031]The top cover 25 is disposed on the upper end of the container 2...
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The invention belongs to the technical field of electrical equipment state detection, and particularly relates to a temperature compensation type lightning arrester resistive current testing device and a use method thereof. The temperature compensation type lightning arrester resistive current testing device comprises a lightning arrester resistive current testing assembly, a temperature compensation assembly, a direct-current battery, a valve plate pressurization line, a compensation calculation circuit, a compensation current line, a display circuit and a resistive current output line; the temperature compensation assembly comprises a container, a standard valve plate, a bottom electrode, a top electrode, a resistance wire and a top cover, the direct-current battery applies direct-current voltage on the standard valve plate to enable the standard valve plate to generate compensation current, the top electrode is connected with the compensation calculation circuit through the compensation current line, and the transmission of the compensation current generated by the temperature compensation assembly is achieved; according to the device, the influence of the negative temperature coefficient characteristic of a lightning arrester valve plate insulation resistor on the test result can be solved, and the test precision of the resistive current of the lightning arrester is improved.
Description
Technical field [0001] The present invention belongs to the technical field of power equipment state detection, and more particularly to a temperature compensation type arrester resistance current test device and method thereof. Background technique [0002] The radiofer is one of the important protection equipment that guarantees the safe operation of the power system. It has the characteristics of high energy absorption, stable protection performance, low residual pressure, and meets the insulation protection requirements of the grid. The radiobrower resistive current test is an important means for the insulation of the arrester. However, because the arresser valve insulation resistance itself has a negative temperature coefficient, in actual detection, the temperature of the lightning arrester itself affects the test results of the resistive current; especially in the operating conditions of large temperature difference, the load changes, will Generate larger resistive current...
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IPC IPC(8): G01R19/00G01R31/52
CPCG01R19/0092G01R31/52
Inventor 李艳鹏杨爱民李永祥俞华马丽强刘志翔张振宇张申吴志远陈青松
Owner ELECTRIC POWER RES INST STATE GRID SHANXI ELECTRIC POWER