Control of Pv Solar Farm As Pv-Statcom For Reactive Power Compensation During Day And Night

Abstract

Power system performance may be defined as the performance study of power system during normal operating condition, fault condition and after removal of fault. A novel concept of utilizing a photovoltaic (PV) solar farm inverter as STATCOM, called PV-STATCOM is proposed in this paper, for improving stable power transfer limits of the interconnected transmission system. During daytime, the inverter capacity left after real power production is used. During different operating conditions system has different real and reactive power flow which is required to be controlled to enhance the system power transfer capability, transient stability and reduce the losses in the system. For this purpose, recent trend is the use of FACTS control devices. The PV-STATCOM improves the stable transmission limits substantially in the night and in the day even while generating large amounts of real power. The main function of the LCL filter is to reduce high-order harmonics on the output side; however poor design may cause a distortion increase. Power transfer increases are also demonstrated in the same power system for: 1) two solar farms operating as PV-STATCOMs and 2) a solar farm as PV-STATCOM and an inverter-based wind farm with similar STATCOM controls. By using the simulation results we can analyze the proposed method.