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This paper presents an efficient method planning Static var Compensators (SVC) to control harmonic voltage distortion and reactive power compensation a power system. The planning problem is formulated as an unconstrained optimization problem. In the approach also considers probabilistic characteristics of voltage, current and impedance of fundamental and harmonics in a power system. The objective...
With the proliferation of Static Var Compensator (SVC) installations, it is important for owners to understand all aspects of design, especially those based on network conditions. This paper discusses the impact of system changes on the existing Chester SVC installation. Specifically, the frequency response of the system is observed as seen from the SVC bus and the affect on the SVC harmonic performance...
This paper presents the power quality analysis of a Synchronous Static Series Compensator (SSSC) connected to a high-voltage transmission network. The analysis employs a simplified harmonic equivalent model of the network that is described in the paper. To facilitate the calculations, a software toolset was developed to measure the voltage harmonics content introduced by the SSSC at the Point of Common...
This paper proposes a novel topology for a three-phase hybrid passive filter (HPF) to compensate for reactive power and harmonics. The HPF consists of a series passive filter and a thyristor-controlled-reactor-based variable-impedance shunt passive filter (SPF). A mutual-inductance design concept is used to reduce the series passive filter inductance rating. The special features of the proposed HPF...
Harmonic current control with converters is widely practiced, e.g. compensation of harmonics generated by a load. Control of harmonic grid voltage components is much more difficult due to the fact that the grid impedance for harmonic frequencies changes in a wide range, which changes the behavior of the control loop significantly. This paper shows how a STATCOM is used to reduce voltage harmonics...
In this paper, a novel principle of a power quality conditioner based on controllable impedance is proposed for high voltage AC power distribution systems application. A linear transformer is employed to act as controllable impedance under the control of power electronic inverter. On the one hand, the transformer can always exhibit nearly zero impedance to harmonic current. Thus, the harmonic current...
Power system signals are often contaminated with harmonics and noise. It is preferable to determine these harmonics for analysis, control and design of power system devices and protection. This paper presents an efficient technique for harmonics current estimation based on adaptive notch filter (ANF). The proposed filter structure is tested, simulated and implemented in a digital signal processor...
Shutdowns may affect seriously harmonic resonant frequencies and may initiate new resonances in power systems in presence of series and shunt capacitors which are used as compensators to improve system operational conditions. Influences of these shunt and series capacitors on harmonic resonance conditions in presence of other harmonic sources are studied in this paper. New harmonic resonances are...
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