Steam mist device and its flow control method for artificial pollution laboratory of high voltage equipment

Abstract

The invention discloses a steam fog apparatus of an artificial pollution laboratory for high-voltage equipment and a flow control method thereof. According to the method, the steam fog apparatus of the artificial pollution laboratory for the high-voltage equipment is employed; a hygrothermograph is employed to measure the initial temperature and humidity of the artificial pollution laboratory; the wetting time and the voltage-boosting time for an artificial pollution test are set; the required total amount of steam is calculated according to the measured initial temperature and the size of the artificial pollution laboratory; the steam flow, the opening degree of a proportional adjusting valve, and the investment amount of electric steam boiler resistance wires are calculated according to the total amount of the steam obtained by calculation and the set time; the opening degree of the proportional adjusting valve and the investment amount of the electric steam boiler resistance wires are adjusted according to a calculation result, and the flow of the steam injected to the artificial pollution laboratory is controlled. According to the steam fog apparatus of the artificial pollution laboratory for the high-voltage equipment and the flow control method thereof, the steam valve is automatically controlled in a remote manner according to the steam flow required by different test stages of the artificial pollution flashover tests, the stability of the conditions for the artificial pollution flashover tests is improved, and the personal safety of operation personnel is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and relates to a steam mist device and a flow control method of a high-voltage equipment artificial pollution laboratory. automatic control. Background technique [0002] Pollution flashover of high-voltage electrical equipment is one of the serious threats to the safe and stable operation of the power system. In my country, pollution flashover accidents have occurred many times in areas with severe air pollution. Pollution flashover accidents often cause large-scale power outages for a long time, and even the grid disintegration, resulting in economic losses. huge. In order to study pollution flashover, many research institutions have built artificial pollution laboratories for high-voltage electrical equipment according to the test methods recommended by the national standard "GB / T 4585-2004", and developed steam mist devices for artificial pollution flashover tests on high-volta...

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Problems solved by technology

[0003] The main problems of the current steam mist device flow control method are: 1) The steam flow is adjusted by manual valve, which cannot be controlled remotely and can only be operated manually on site. When the steam mist device is working, the steam pressure and temperature are relatively high. The safety risk of personnel operation is relatively large; 2) In each test, the experimenter needs to artificially adjust the steam flow according to the steam volume in the climate chamber, resulting in inconsistent wetting time and pollution loss speed of the tested product in each test, thus 3) The national standard stipulates that during a single artificial pollution flashover test, the temperature rise in the artificial pollution test room shall not exceed 15°C. The current method of manually controlling the steam flow often leads to a rise in the test temperature. exceed the standard

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