Reduction of power oscillation damping using modified recursive least square algorithm and STATCOM with energy storage

ELECTRICAL &ELECTRONICS ENGINEERIG

STATIC synchronous compensator (STATCOM) is a key device for reinforcement of the stability in an ac power system. This device has been applied both at distribution level to mitigate power quality phenomena and at transmission leve l for voltage control and power oscillation damping (POD) [1]–[3]. Although typically used for reactive power injection only, by equipping the STATCOM with an energy storage connected to the dc-link of the converter,a more flexible control of the transmission system can be achieved [4], [5] The control of STATCOM with energy storage (named here after as E-STATCOM) for power system stability enhancement has been discussed in the literature[7]–[9].However, the impact of the location of the E-STATCOM on its dynamic performance is typically not treated. When active power injection is used for POD, the location of the E-STATCOM has a significant impact on its dynamic performance. Moreover, the typical control strategy of the device for POD available in the literature is similar to the one utilized for power system stabilizer(PSS)[6], where a series of wash-out and lead-lag filter links are used to generate the control input signals. This kind of control strategy is effective only at the operating point where the design of the filter links is optimized, and its speed of response is limited by the frequency of the electromechanical oscillations. In this project, a control strategy for the E-STATCOM when used for POD is proposed, the control strategy optimizes the injection of active and reactive power to provide uniform damping at various locations in the power system. It will be shown that the implemented control algorithm is robust against system parameter uncertainties The power arising out of the wind turbine when connected to a grid system concerning the power quality measurements, are: active power, reactive power, voltage sag, voltage swell, flicker, harmonics, and electrical behavior of switching operation. Fuzzy Logic has two different meanings. In a narrow sense, Fuzzy Logic is a logical system, which is an extension of multivalve logic. However, in a wider sense Fuzzy Logic is almost synonymous with the theory of Fuzzy sets, a theory which relates to classes of objects with un sharp boundaries in which membership is a matter of degree. In this paper fuzzy logic controller is used for controlling the DC capacitor voltage. Simulations using MATLAB / SIMULINK are carried out to verify the performance of the proposed controller.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.