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An optimal rephasing strategy is proposed to solve the unbalance problem for the distribution network. The multi-objective function is proposed by considering the unbalance rate and the compensation paid to the customers. Meanwhile, the unbalance rate is calculated to determine the rephasing time. This strategy can overcome the problem of ignoring the economic factors and the problem of rephasing...
This paper proposes an approach to optimize the parameters of DC voltage droop control. The objective is minimizing the sum of ITAE(integral of time-weighted absolute value of error) of DC voltage, active power and reactive power of the VSC(voltage sourced converter). The simplex algorithm is adopted to solve this problem. The initial values of the parameters of DC voltage droop control are known,...
The identification of inrush current has been the focus of relay protection for a long time. In recent years, using waveform symmetry principle to identify inrush current has received more attention. This method identify the waveform of the magnetizing inrush current by comparing current's waveform's shape, size or change rate. However, the traditional waveform recognition method has the defects of...
The goal of maintaining system operation stability, improving reliability and reducing loss in DC distribution system can be achieved through optimal power flow (OPF). Firstly, a multi-objective OPF model of DC distribution system targeting on reducing system total fault rate and power loss is established with consideration of constrains including converter capacity, operation safety and the charge-discharge...
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