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This paper gives the State Space modeling of Distribution Static Synchronous Compensator (D-STATCOM). It is important to keep the voltage constant in the distribution system, hence voltage regulation is required in the distribution network. Voltage Source Converter (VSC) based D-STATCOM achieves voltage regulation in the connected bus by absorbing/supplying the required reactive power. The capability...
One kind of variable reactor is proposed. It consists of variable reactance converter and electronic power inverter. The topology and the impedance conversion mechanism of variable reactor are illustrated. And the variable reactor is simulated using Matlab/Simulink. The simulation results prove that the impedance of variable reactor can be adjustable smoothly and its higher harmonic content is small...
This paper describes the analysis and design of a grid connected wind generating system with voltage source converter (VSC). When wind generating system (WGS) is connected to grid create a problem of power quality such as poor power factor, voltage distortion, and harmonic distortion on the grid. The grid connection is realized by a controlled PWM voltage source inverter. The VSC is operated in hysteresis...
To study and analyze the dynamic performance of the flexible AC transmission system (FACTS) devices, modelling of the FACTS devices is needed. Reactive power compensation is an important issue in the control of electric power systems. Reactive power increases the transmission system losses and reduces the power transmission capability of the transmission lines. Moreover, reactive power transmitted...
With a common DC bus, the grid-connected inverter (GCI) modules are directly paralleled. The principle of the zero-sequence circulating current (ZSCC) is analyzed. A ZSCC control scheme is proposed which does not impact the other control objectives such as the active and reactive power transmitted from the grid-connected inverter to the gird. A simulation model of a paralleled inverter with three...
A new, utility-interactive hybrid distributed generation scheme, with reactive power compensation feature, is presented. The basic objective is to realize a reliable power supply for a remotely located critical load. Fuel cell (FC) stack and photovoltaic (PV) array are considered as energy sources. These sources can be operated independently or in conjunction as per the requirement. The control logic...
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