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CONTROL METHOD TO IMPROVE TRANSIENT PERFORMANCE OF HVDC SYSTEM AND INVERTER CONTROL APPARATUS OF HVDC SYSTEM
CONTROL METHOD TO IMPROVE TRANSIENT PERFORMANCE OF HVDC SYSTEM AND INVERTER CONTROL APPARATUS OF HVDC SYSTEM
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机译:高压直流输电系统暂态性能的控制方法及高压直流输电系统的逆变器控制装置
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摘要
The present invention relates to a control method to improve transient performance of a high-voltage direct current (HVDC) system. According to an embodiment of the present invention, the control method to improve transient performance of an HVDC system includes the following steps of: (a) determining whether a rectifier of an HVDC system operates in a constant-current control mode by a control unit of an inverter control device for controlling an operation of an inverter of the HVDC system; (b) determining, by the control unit, whether the inverter operates in the constant-current control mode when the rectifier operates in the constant-current control mode; and (c) increasing an extinction angle command value applied to a constant extinction angle controller in the inverter control device by a predetermined extinction angle correction value by the control unit when the rectifier and the inverter operate in the constant-current control mode. The HVDC system can relatively reduce a voltage change of an AC system and output of an inverter in a process of recovering after the AC system of the rectifier malfunctions and can shorten the transient time which is a time required for reaching a normal state.;COPYRIGHT KIPO 2017
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