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A three-phase four-wire DSTATCOM (distribution static compensator) based on three-leg VSC (voltage source converter) isolated with a star/hexagon transformer is demonstrated for power quality enhancement in a three-phase four-wire distribution system. The DSTATCOM is controlled to compensate the reactive power, eliminate harmonic currents, balances the load and also to mitigate the neutral current...
A new topology of DSTATCOM (distribution static compensator) consisting of a H-bridge VSC (voltage source converter) and a star/delta transformer is proposed for power quality improvement in a three-phase four-wire distribution system. The star/delta transformer provides isolation to the H- bridge VSC as well as mitigates the zero sequence current in a three-phase four-wire distribution system. The...
This paper deals with the decoupled voltage and frequency controller (DVFC) for isolated asynchronous generator (IAG) used in pico hydro power generation for feeding 3-phase, 4-wire loads. The proposed controller is used to control the voltage and frequency through control of active power and reactive power at the generator terminal independently. The decoupled controller is a combination of a static...
This paper deals with the control of voltage and frequency of an isolated wind energy conversion system (WECS) based on capacitor excited asynchronous generator and feeding 3-phase 4-wire loads. The proposed controller consists of an IGBT (insulated gate bipolar junction transistor) based 4-leg voltage source converter (VSC) and a battery at DC link. Three legs of the converter are connected to each...
The transient performance of 3-phase 4-wire self-excited induction generator (SEIG) feeding various types of linear and non-linear loads is analyzed in detail. The reactive power of SEIG and the load are being controlled by a 3-phase 4-wire configuration of static compensator (STATCOM). The STATCOM is an insulated gate bipolar transistor (IGBT) based, pulse width modulation (PWM) operated, four-leg...
This paper deals with an investigation on a controller, which regulates the voltage and frequency of an isolated asynchronous generator (IAG) driven by an uncontrolled pico hydro turbine to feed 3-phase 4-wire loads. The proposed controller is having capability to regulate the voltage and frequency in decoupled manner. A STATCOM (static synchronous compensator) is used to control the reactive power...
This paper deals with a voltage and frequency controller for parallel operated isolated asynchronous generators used in constant power applications such as driven by uncontrolled pico hydro turbines. The proposed controller is having capability of controlling the voltage and frequency in decoupled manner. For controlling the voltage, a static compensator (STATCOM) is used as a reactive power compensator...
This paper deals with a battery energy storage system (BESS) based voltage and frequency (VF) controller for parallel operated isolated asynchronous generators (IAGs) driven by uncontrolled pico hydro turbines used in constant power applications. The individual AC capacitor banks are used to generate the rated voltage at no load while additional demand of reactive power for the load and generators...
This paper deals with a solid state voltage and frequency controller for an isolated wind energy conversion system (WECS) based on capacitor excited asynchronous generator (CEAG) and feeding an induction motor load. The proposed voltage and frequency controller consists of an IGBT (insulated gate bipolar junction transistor) based voltage source converter along-with battery energy storage system (BESS)...
This paper deals with the voltage and frequency controller (VFC) for isolated asynchronous generator feeding 3-phase 4-wire loads for constant power applications such as pico hydro uncontrolled turbines. An AC capacitor bank is used to self excite and to meet the reactive power requirement of the asynchronous generator which is also known as self excited induction generator (SEIG). The proposed VFC...
This paper deals with the analysis and hardware implementation of a fuzzy precompensated proportional-integral (FPPI) speed controller for vector controlled (VC) permanent magnet synchronous motor (PMSM) drive using a digital signal processor. The power circuit of the PMSM drive consists of insulated gate bipolar transistor (IGBT) based voltage source inverter (VSI) and the gate driver circuit. The...
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