Abstract Aiming at the problems of voltage fluctuation and harmonics in photovoltaic grid connection, improvement a three-phase rectifier circuit is proposed, results are verified by MATLAB simulation. At same time, this paper also puts forward application four-wire three-level parallel APF structure Three-term PWM rectification technology. By compensating harmonic current generated controlling...

The article discusses the issues of creating contactless switching devices for automatic quality control and operation modes power supply systems, using developed thyristor voltage relays, characterized by high reliability speed, combining a sensitive system powerful final controlling element. Schemes with operating principles experimental characteristics are given. It is proposed to use it aut...

This work confers the simultaneous analysis of voltage and frequency control 3-area interconnected hybrid power system (IHPS) consisting parabolic-trough solar (PSP), wind (WPS) dish-stirling (DSP) under paradigm microgrid. The speculated result IHPS is presented analyzed considering real reactive as function both frequency. 9The proposed investigation has been mathematically modeled for direct...

Calculation of the reference waveform for compensating current generated by shunt active power filter (ShAPF) can be carried out using various methods. In this article, calculation is performed indirectly on basis tracking and processing ShAPF DC-link capacitor voltage. At same time, energy stored in used to generate current. Therefore, operation during compensation, i.e., changes it voltage it...

The development of industrial technology is based on electronic devices that are sensitive to power quality. Thus, the demand for high-quality and reliable supplies increasing. Voltage sag results in severe problems manufacturing process quality-sensitive loads. When a fault occurs multi-ground distribution system, magnitudes current voltage faulted nonfaulted feeders become high. Hence, instal...

The Dynamic Voltage Restorer (DVR) is one of the most efficient and effective custom power devices in protecting sensitive equipment against voltage sag harmonics due to; lower cost, smaller size dynamic response. inverter core DVR it directly affects performance DVR, incorrect injection or delay process would be dangerous to loads. major functions controller are, detection disturbances events ...

background: increasing the complexity in modern radiotherapy techniques have increased the delivery time lowering consequently the treatment efficacy. through simulating the delivery time delay encountered in such techniques, its’ effect on two cancer cell lines and the compensating doses given to prevent such effect was investigated. materials and methods: f10b16 and 4t1 cancer cell lines were...

Active power filter continues to be a powerful tool to control harmonics in power systems thereby enhancing the power quality. This paper presents a fuzzy tuned PID controller based shunt active filter to diminish the harmonics caused by non linear loads like thyristor bridge rectifiers and imbalanced loads. Here Fuzzy controller provides the tuning of PID, based on firing of thyristor bridge r...