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Power sharing performance is a critical issue of hybrid energy storage system (HESS) in autonomous DC microgrid (MG). In this paper, a novel integral droop (ID) is proposed to mimic dynamic characteristics of the capacitor by using energy storages (ESs) with quick response. The main advantage of the proposed controller is that dynamic power sharing among ESs is automatically realized in the decentralized...
STATCOMs provide grid with not only reactive power compensation but auxiliary stability support through exerting influence on the dynamic behavior of Synchronous Generator (SG) during grid power oscillations. In this paper, method of electrical torque analysis is utilized to analyze the mechanism of STATCOM affecting the transient performance of SG when operates in power oscillations suppression mode,...
In dealing with the wide voltage range of renewable energy and energy storage device, non-inverting Buck-Boost converter (NIBB) have been utilized for DC-DC power conversion. This converter shows efficient steady-state performance under asynchronous control, but the dynamic performance is poor when input and output voltage are near. In this paper, the concept of unified mode control for NIBB is proposed...
The microgrid can operate in grid-connected mode and islanded mode, and the parallel operation of inverters will be involved in both modes. However, due to the differences of output characteristic among various inverters, the load power can't be shared equally. As a result, some methods without communication lines such as droop control and VSG (virtual synchronous generator) control have been proposed...
Virtual synchronous generator (VSG) has been developed recent years as a promising grid-tied inverter control strategy because it can improve the penetration of the renewable energy. Due to introducing virtual inertia, the active power loop of VSG behaves as a typical second-order system, which may cause active power oscillation. It is a key issue that designing the parameters of active power control...
A pulsewidth-modulation (PWM)-based sliding mode control (SMC) scheme for improving the dynamic performance of a series-series compensated wireless power transfer system (WPT) with maximum energy efficiency tracking (MEET) is proposed in this paper. In this system, the receiver module comprises a buck-boost converter that is regulated using SMC to emulate the optimal load value, following the maximum...
This paper investigates the dispatch of diesel generators in Kinmen Island power system with wind power generators. Because wind conditions are somewhat unpredictable, it is difficult to provide a stable base load of power to the grid from wind energy. To ensure an adequate supply of energy at all times, wind energy needs to be combined with other sources. To know the dynamic behavior of the system,...
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