Zhikang Shuai

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This paper describes the control strategy for the static synchronous compensator (STATCOM) used in utility distribution systems is investigated, fuzzy-PI-based direct output-voltage (DOV) control strategy is presented. Based on power balancing principle, this DOV control strategy cannot only reduce the active and reactive current control loops of a(More)
In this paper, an improved control method for multiple bidirectional power converters is proposed to reduce the circulating current and power-sharing deviation among converters when the hybrid ac/dc microgrid operated in island mode, which can enhance the security of parallel converters. First, a unified detection method for circulating current and(More)
Due to inherent time delays in the control system of Hybrid Active Power Filter with Injection Circuit (IHAPF) and the load harmonic currents changes rapidly and dramatically. In order to eliminate these harmonic currents, an IHAPF to be used must be able to respond quickly following variable of the harmonic currents. So, this paper proposes a PID-fuzzy(More)
In this paper the current harmonic can be compensated by using the Shunt Active Power Filter, Passive Power Filter and the combination of both. The system has the function of voltage stability, and harmonic suppression. The reference current can be calculated by dq transformation. An improved generalized integrator control was proposed to improve the(More)
This paper presents a prediction method for obtaining harmonic reference of distribution static synchronous compensator (DSTATCOM) control. It is a new use of adaptive predictive filter based on FIR in DSTATCOM control for harmonic suppression. Not only the time delay is successfully compensated by the prediction method, but also the algorithm is not(More)
Abstract: This paper proposes an improved pulse-width modulation (PWM) strategy to reduce the capacitor voltage ripple in Z-source wind energy conversion system. In order to make sure that Z-source capacitor voltage has symmetrical maximum and minimum amplitudes in each active state, the shoot-through time is divided into six unequal parts. According to the(More)