Extracting method of reference voltage of dynamic voltage restorer in isolated neutral system
A technology of dynamic voltage recovery and ungrounded neutral point, which is applied in the direction of measuring current/voltage, instrumentation, measuring electricity, etc., and can solve problems such as DC side voltage rise, harm, and imbalance
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[0085] The technical solution of the present invention can be implemented by those skilled in the art by means of computer software to realize the automatic operation process. The technical solution of the present invention will be described in detail below in conjunction with the drawings and embodiments.
[0086] A method for extracting a reference voltage of a dynamic voltage restorer in a neutral point ungrounded system, which comprises the following steps in sequence:
[0087] 1) Set the amplitude of the limit compensation voltage of the dynamic voltage restorer as V m ; During normal operation, the magnitude of the load phase voltage is V NM , the magnitude of the line voltage is V L . In the general power system, the three phases are respectively recorded as A, B, and C phases, and the amplitude V of the three phase voltages on the DVR system side after the fault is measured sagA , V sagB , V sagC with the magnitude of the three line voltages V sagAB , V sagBC , ...
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