The study theoretically analyzes how an AC power flow penetration into positive and negative poles of the DC bus in the substation and the optocoupler of the external tripping input circuit of the microcomputer integrated protection impacts microcomputer relay based on specific circuit parameters and integrated protection equipment.Multisim simulation is used to simulate the voltage waveform at both ends of the coupling during AC disturbance,verifying the cor-rectness of the theoretical analysis.The strategy of using high-power intermediate relays for resetting important tripping circuits is proposed,and the selection of action power and action time of intermediate relays is analyzed,which provide useful information for engineering applications.
关键词
交流扰动/光耦/分布电容/重动中间继电器
Key words
AC disturbance/optocoupler/distribution capacitance/resetting intermediate relay
维普
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