Yonggao Zhang

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Voltage stability margin (VSM) of the power system relates to the reactive power reserves in the network. This paper presents a method to improve the VSM by generator reactive power generation rescheduling. The management of the var generation formulated as an optimization problem and pseudo-gradient evolutionary programming (PGEP) was used to obtain the(More)
Different common mode (CM) EMI suppression methods are discussed and a parallel-connected active CM EMI suppression technique with digital closed-loop control is presented. A novel CM noise evaluation measure based on the energy of CM noise current is proposed. The relationship between the energy of CM noise current and the lead/lag time of compensating(More)
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