Detection Method of HVDC Commutation Failure Using Transient Characteristics of Valve Current

In this study, a detection method of high voltage direct current (HVDC) commutation failure using transient characteristics of valve current to solve the problem of no reliable detection method for HVDC commutation failure in electromagnetic transient simulation is designed. By analyzing the transient characteristics of the valve current in the commutation failure process, the commutation failure criterion is extracted and the detection method has been designed. The detection method includes three parts: detection of valve current extreme point and change rate on its both sides, detection of maximum valve current, and detection of continuous non-zero time of valve current after extreme point. Using the PSCAD/EMTDC electromagnetic transient simulation software, a detection method based on the CIGRE BENCHMARCK HVDC model is built up, and the validity and accuracy of the detection method by simulation is verified. (paper)