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The grid connectivity requirements imposed today, ask for an accurate controller design able to deal with system constraints and nonlinearities. In order to fulfill grid international standards, this paper details a Finite control set model predictive controller called FCS-MPC as part of controlling an energy conversion system. It uses a discrete time 3L-NPC inverter model (in the α-β frame) to predict...
This paper proposes a hybrid control algorithm to maximize utilization and functionality of distribution static compensator (DSTATCOM). This control algorithm combines the different aspects of DSTATCOM operation and tries to mitigate the voltage and current harmonics, balance the source currents, improve the power factor, compensate for voltage disturbances such as sag and swell, reduce the losses...
This paper presents a proposal for a new algorithm and a modification for variant of delta modulation technique that is used for generating the control signals for main devices of PWM converters. Moreover, modeling and a simulation is developed for this modified variant of delta modulation technique. The effect of this algorithm is tested by using the developed simulation of quasi-stationary states...
This paper presents a novel control method for PWM boost rectifier based on instantaneous power. Unlike most of the existing control strategies implemented in synchronous or p-q (active-reactive power) frame, the proposed method can provide unity power factor on the AC side in stationary frame. Rotating transformation and phase detection are eliminated, offering a very simple solution. Based on the...
This paper presents detailed analysis to compare and evaluate the performances of four control strategies for extracting the reference currents of shunt active power filter under distorted and unbalanced source and load conditions. The four controllers are based on instantaneous reactive power (p-q), d-q coordinate formulation (d-q), unity power factor (UPF), and perfect harmonic cancellation (PHC)...
The principles and technologies of var compensation implemented with static capacitors, static Var compensator and static Var generator are concisely presents. The simulation and study for these methods are made. These methods' merits and faults are also compared through the wave analysis after simulation. It is shown the SVG is even more advantageous to dynamically improve voltage regulation, stability,...
A three phase six pulse controlled bridge rectifier with adjustable value of injection third harmonic current is used to control DC drive. In order to improve the power quality of both AC and DC sides of the system the injection circuit parameters have to be varied according to drive loading operating conditions. Therefore the values of injection circuit parameters depend on the firing angle (alpha)...
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