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This paper describes a novel sliding mode method with the fuzzy controller approach in the development of unified power quality conditioner (UPQC) for reactive power, harmonics and both symmetric and asymmetric sag and swell compensation. The UPQC consists of both shunt and series converter having a common dc link. The shunt converter eliminates current harmonics generated from the nonlinear load...
The DC-bus voltage self-regulating of Hybrid Active Power Filter (HAPF) is not only critical to compensation performance, but also to the safe operation. Traditional controller, e.g. P or PI, has disadvantages for these applications. Regarding the popular shunt HAPF with passive and active filters in serial connected, this paper presents a novel controller for the DC-bus voltage self-maintaining....
In this paper, the using of a flying capacitor multicell inverter in a series active power filter for voltage quality improvement is proposed and simulation results are provided to remark its capabilities. The multicell inverter has advantages over a PWM inverter such as improved bandwidth, low switching ripple, and small dv/dt, so it is a good choice for sensitive loads. The series active power filter...
With the deregulation of the electric power energy market, providing quality power has become an important concern of both power suppliers and customers. Efforts have been made to improve the power quality using passive filters, active power filters, hybrid filters and the new concept of custom power. This paper presents a comprehensive review of compensating custom power devices mainly DSTATCOM (distribution...
In this paper, an outer loop model for DC link voltage control in a three-phase three-wire universal power quality controller (UPQC) is proposed based on the equilibrium of instantaneous power in parallel active power filter. According to the small signal model, a new controller for DC link voltage control has been designed. It is expected to improve the system performances in both reference following...
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