Research on Modeling Control and Protection Strategy of Supplying Pow- er to Passive Network of MMC-HVDC System
نویسندگان
چکیده
This paper is based on the EL mathematical model of the MMC synchronous rotating coordinate system, derived the MMC passive control law, the inner ring current passive controller is designed and the AC voltage controller is set. In order to restrain the negative sequence current caused by the network voltage unbalance or asymmetric AC system fault, the positive and negative sequence of independent passive controller and the control of failure protection strategy were proposed. Finally 21st level supply power to passive network-MMC HVDC system model was set up under the PSCAD/EMTDC, the response characteristics of various working conditions is the controller and the control protection strategy has been carried on a simulation, and the characteristics of the positive and negative sequence of passive control and vector control were comparative analyzed.
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