Phase control switch design method of dynamic simulation system and related assembly

Abstract

The invention discloses a phase control switch design method of a dynamic simulation system and a related assembly. The scheme is applied to the dynamic simulation system of a power distribution network, and when an AC voltage zero crossing point of a fault phase set by a user is detected after a starting signal is received, the conduction of a bidirectional thyristor module connected with the fault phase is controlled after a fault triggering time, and therefore, the fault phase is grounded. Therefore, due to the fact that the conduction time of the thyristors is short, the delay time for controlling the conduction of the bidirectional thyristor module is short, in addition, the conduction time of the bidirectional thyristor module can be accurately controlled through real-time zero crossing point detection, the control precision of the bidirectional thyristor module is further improved, and therefore, fault simulation of the dynamic simulation system of the power distribution network can be realized.

Description

technical field [0001] The invention relates to the field of control of a dynamic mold system, in particular to a design method of a phase control switch of a dynamic mold system and related components. Background technique [0002] The neutral point grounding mode of my country's distribution network is a small current grounding system. In the small current grounding system, the single-phase grounding fault has the highest probability of occurrence. Because its fault characteristics are affected by the system capacity current, system unbalance, fault initial phase angle and fault Influenced by many factors such as transition resistance, the fault characteristics are quite complex, so single-phase-to-ground fault handling has always been a technical problem in the operation of distribution networks. In addition, the occurrence of a single-phase ground fault may cause damage to the insulation of the equipment, or cause a fire or even cause personal injury or death. The new ver...

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Problems solved by technology

[0004] At present, most of the phase-controlled switches used in the dynamic model system are realized by AC contactor or permanent magnet fast switch action delay, but because the switching time of the AC contactor or permanent magnet fast switch has a certain discreteness, it is also That is, it is impossible to determine the exact delay time of the current AC contactor or permanent magnet fast switch action, and the delay time has a certain relationship with the voltage phase at the trigger moment, so relying on the AC contactor or permanent magnet fast switch to realize the distribution network The accuracy of the simulation effect of single-phase fault grounding in the dynamic model system is low

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