Explosion-proof test method and device, and design method and device of zinc oxide-containing equipment

Abstract

The invention discloses an explosion-proof test method and device, and a design method and device of zinc oxide-containing equipment. The zinc oxide-containing equipment comprises a zinc oxide resistor disc. The test method comprises the following steps: making an impulse current generator supply different impulse currents to the zinc oxide resistor disc; obtaining impact strength of resistor discfragments generated when the zinc oxide resistor disc is damaged under the different impact currents, and the maximum pressure of compressed air in the zinc oxide-containing equipment when the zinc oxide resistor disc is damaged; and obtaining the maximum impact strength generated when the zinc oxide resistor disc is damaged under the different impact currents according to the impact strength andthe maximum pressure. According to the technical scheme, a damage process of the zinc oxide resistor disc is effectively simulated in a test process, authenticity and test efficiency of the explosion-proof test are improved, economy of the explosion-proof test is increased, and a design of an explosion-proof structure of the zinc oxide-containing equipment is effectively guided.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of electrical engineering, and in particular to an explosion-proof test method and device, design method and device for equipment containing zinc oxide. Background technique [0002] Zinc oxide resistors are the core components of lightning protection equipment. Zinc oxide resistors are widely used in power systems due to their excellent nonlinear characteristics and tolerance. Under normal voltage, the zinc oxide resistor is a high-resistance resistor, which plays an insulating role. Under lightning overvoltage, the zinc oxide resistor is converted into a low-resistance resistor, and a large current flows through the zinc oxide resistor to release to the earth. After the voltage is applied, the resistance value of the zinc oxide resistor sheet recovers rapidly, and the insulation of the circuit is restored. When a large current flows through the zinc oxide resistor, a large amount...

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Problems solved by technology

However, if the thickness of the notch is too small, the mechanical force of the epoxy structure will decrease, and the internal notch will be easily damaged under wind deflection or electric power. External moisture will invade the internal resistor, causing the resistor to become damp and fail.

If the thickness of the notch is too large, the stress generated by the damage of the resistor cannot be released immediately. Under the continuous burning of the arc, a large amount of gas will be generated inside the lightning protection device, which may cause severe damage to the overall structure of the lightning protection device. Combustion will occur under continuous high temperature, which will affect the safety of lightning protection equipment and personnel

The current standard requires the explosion-proof performance test of the lightning protection equipment body to analyze the explosion-proof performance of the lightning protection equipment, but the impact on the structure under the damage of the zinc oxide resistor cannot be obtained in the test, and it can only be simply judged whether it is passed. For the explosion-proof structure The significance of design guidance is not strong, and the cost of a single explosion-proof test is high. If multiple tests are used to verify the performance of the explosion-proof structure, the economy is not strong

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