Published Paper Details:

To maintain voltage stability of a power system, STATCOM is better solution which can provide the required amount of reactive power under various power system disturbances. This paper proposes a solution to enhance the performance of the STATCOM by adding supercapacitor which is a energy storage device to DC link of the conventional STATCOM. With the fast charge or discharge characteristics of the supercapacitor, the enhanced STATCOM can absorb and eject real and reactive power to the AC Power Grid instantaneously. In addition, this paper also proposes that the enhanced STATCOM can be applied to reduce instability and tripping due to the Rate of Change of Frequency (RCF) protection devices caused by large load impact. The amount of the energy required for the enhanced STATCOM to maintain the stability of the system is also discussed. In this paper, Static Synchronous Compensator (STATCOM) with energy storage system for wind power application has been implemented. This device was proposed to improve voltage stability and power transmission by offering reactive as well as active power compensation. The energy storage system used for this application was designed and simulation results were discussed. For active compensation for wind power, a bank of Super Capacitors for Energy Storage System(SCESS) was used. The super capacitor bank size was designed and used, based upon the short term fluctuations in wind power. These fluctuations are results of constructional factors of the turbines, variation and turbulence in the wind. A super capacitor bank was interface with the DC bus of the STATCOM with the normal half bridge boost converter, to convert voltage level of the bank while maintaining a constant DC bus voltage for good switching operation in the VSC