A pressurization test method for thyristor electronic equipment in humid environment
A pressurized test and humid environment technology, applied in the direction of measuring electricity, measuring electrical variables, single semiconductor device testing, etc., can solve problems such as TE board false trigger signal, converter valve misconduction failure, threat to the safety of DC main equipment, etc. , to achieve the effect of avoiding false trigger signal and avoiding false conduction
Active Publication Date: 2019-01-18
EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID
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Problems solved by technology
[0003] However, the current TE board does not adopt a closed design. If the surface of the TE board is seriously polluted and the ambient humidity is high, it may cause the TE board to send a trigger signal by mistake, resulting in a misconduction fault of the converter valve during the DC standby transfer blocking operation. The DC system generates overvoltage and overcurrent, which directly threatens the safety of the main DC equipment, and in severe cases can cause damage to the converter valve components
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[0020] Such as figure 1 , figure 2 as shown,
[0021] A pressure test method for thyristor electronic equipment in a humid environment, comprising:
[0022] Step 1. Place the TE board 1 to be tested in the temperature and humidity control box 2, and prepare the high-voltage AC power supply for the pressurization test of the TE board 1 outside the temperature and humidity control box 2;
[0023] In this embodiment, a 220V AC power supply 3 is used to pressurize the TE board 1, and a voltage regulating transformer 4 with a capacity of 10kVA and an adjustment range of 0 to 250V is connected, and then the voltage is boosted by a transformation ratio of 150V / 10kV. Transformer 5, and one end of the power supply is grounded, and the voltage applied to the TE board 1 can be changed by adjusting the voltage regulating transformer 4;
[0024] Step 2. After connecting the damping resistor and the damping capacitor in series, one end is connected to the high-voltage AC power supply, a...
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The invention provides a voltage-applied test method for silicon controlled rectifier electronic equipment (TE board) in the moist environment. The method comprises the steps including providing a high-voltage AC power supply which applies voltage to the TE board, establishing an energy taking loop of the TE board, establishing a voltage applying loop of the TE board, establishing a silicon controlled rectifier triggering loop and utilizing an oscilloscope to monitor signals of the TE board. The TE board is arranged in a temperature and humidity control box, and other devices are arranged outside the box via connecting lines led out of the control box. The high-voltage power supply is used to apply voltage to the TE board in the high humidity environment, key signals of the TE board and triggering signals sent the silicon controlled rectifier by the TE board are monitored, the working performance of the TE board under the high-pollution high-humidity condition can be tested, mis-triggering accidents can be effectively avoided, and safety of equipment of electrical network is guaranteed.
Description
technical field [0001] The invention relates to the technical field of power system control operation protection, in particular to a pressurization test method for thyristor electronic equipment of a high-voltage direct current transmission system in a humid environment. Background technique [0002] The thyristor electronic equipment (referred to as TE board) of the HVDC project is located on the converter valve tower, and each TE board corresponds to a thyristor stage. The TE board is responsible for the DC voltage equalization of the thyristor stages connected in series in the valve, and at the same time, it must detect the following states of each thyristor stage: whether the thyristor stage is normal; whether the thyristor has established a positive threshold voltage (positive voltage establishment ); whether the thyristor current crosses zero (negative voltage establishment); whether the thyristor is triggered due to the voltage change rate du / dt being too high, or the...
Claims
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IPC IPC(8): G01R31/26
CPCG01R31/2637
Inventor 黄义隆唐金昆霍立海李晋伟
Owner EXAMING & EXPERIMENTAL CENT OF ULTRAHIGH VOLTAGE POWER TRANSMISSION COMPANY CHINA SOUTHEN POWER GRID