Solid‐state control for reactive power compensation and power quality improvement of wound field synchronous generator‐based diesel generator sets

Abstract

This paper presents the use of pulse-width modulated voltage source converter (PWM-VSC) for power quality improvement of a wound field synchronous generator-based diesel generator (DG) set realising standalone supply system. The system consists of a diesel engine driven wound field synchronous generator, a three-leg PWM-VSC with a capacitor on the DC link and linear/non-linear loads. The PWM-VSC supplies the leading kilo volt-amphere reactive (kVAR) to the loads and maintains the unity power factor of the DG set. In addition, it eliminates the harmonics from the source currents and provides load balancing. The terminal voltage is controlled by field excitation control of the generator and the supply frequency is controlled by the speed regulating system of the diesel engine. A variable step size filter-x least mean square-based control algorithm is used for estimation of reference currents for control of VSC.

Optimal selection of single tuned passive filters to enhance post‐fault voltage recovery and power quality in a renewable integrated microgrid

“…Since, a single STPF unit can bypass a single harmonic order at the tuned resonant frequency, the capacitance values in vector ( 11) can be computed using Equation ( 4) by assuming the other parameters. The vector TF in (12) indicates the tuned frequencies corresponding to each filter ( f i ):…”

“…If large amounts of inverter-based DGs such as solar PV, wind are added to the grid, the harmonic problem can become even worse. Increased levels of Total Harmonic Distortion (THD) in grid bus voltages are caused by greater harmonic current input by both loads and DGs [12,13]. Harmonic currents are injected by loads and DGs with a nonlinear voltage -current attribute, resulting in communication interference, loss of robustness, reduced electricity production, transmission, and utilization efficiency, greater functioning expenses, appliances overheating, parts of ageing, and erroneous energy metering [14].…”

Performance Analysis of Closed loop Control of Diesel generator power supply for Base Transceiver (BTS) Load

“…The broad control objectives of the grid-side converter are as follows [20], [21]  The UPFC is designed so as to maintain the DC link voltage (V dc ) constant. So the responsibility of maintaining a constant V dc lies with the controller associated with the UPFC.…”

Risk Mitigation of Poor Power Quality Issues of Standalone Wind Turbines: An Efficacy Study of Synchronous Reference Frame (SRF) Control

“…B.Singh et al presented a control scheme with an SRF-and PLL-based strategy in [14][15][16]. For such power quality issues, reactive power compensation can be applied as in B.Singh et al, who depicted some control schemes for mitigation of this problem in [17][18][19]. Some optimization techniques were used to tune the Proportional Integral (PI) controller of the control algorithm and to get accurate values of PI gains.…”