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This paper proposes a generalized hysteresis current controlled three level voltage source inverter (VSI) based single phase shunt active power filter (SAPF). The three level inverter topologies considered in this paper are H-bridge and diode clamped inverters. A generalized hysteresis current control with multiband hysteresis modulation has been used to control the voltage source inverters in the...
This paper presents a simple, effective and robust control strategy applied to parallel connected single phase voltage source inverters. The proposed control strategy has two control loops with instantaneous average values: one for voltage and another for current. The first one controls the output voltage of the inverter while the second controller is designed to lead the parallel operation of the...
The presence of an LC input filter in an electrical system often results in degradation of dynamic performance and instability of the system. This paper addresses the global stability study of an electrical system comprised of a DC power supply, an LC filter and an actuator (inverter - permanent magnet synchronous motor or induction motor). Circle criterion is used to study the global stability of...
In order to connect an LCL filter in a three phase system, two methods are possible. The first one is a wye connection and the second one is a delta connection. To study the stability problems, a mathematical model should be known, but the model of a delta connected LCL filter is not formulated. In this paper, a model with transfer functions is proposed for that purpose. Furthermore, this paper describes...
This paper presents a complete strategy for harmonics identification and neural control of a three-phase voltage inverter used for the power active filtering. Based on the use of neural techniques, this approach of compensation is done in two stages. The first stage extracts the harmonic currents with the diphase currents method by using Adaline neural networks. The second stage injects the harmonic...
This paper presents a filter structure for improving the performance of switching band controlled Dynamic Voltage Restorer (DVR) and a systematic design procedure for the passive filter components. The switching operation of VSI is accompanied by a band controller which restricts the injected voltages within a band, defined about a reference voltage. Switching band control method exhibits merits such...
The paper describes FPGA-based real-time simulation method of photovoltaic systems. FPGA devices are widely used for power electronic systems control, but the same chip can have implemented real-time model of controlled system. Prototyping the control circuit before application in power system increases the safeness, and can reduce time and costs of implementation. FPGA-based prototyping of power...
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