Simultaneous operation of wind and pumped storage hydropower plants in a linearized security-constrained unit commitment model for high wind energy penetration

Abstract

Abstract The operation of pumped storage hydropower plants (PSHPs) in the security-constrained unit commitment (SCUC) problem with the consideration of high wind energy penetration has become a practical issue for power systems. In this paper, first, a comparison is made between the operation of fixed-speed and adjustable speed PSHPs in the proposed linearized SCUC model based on the calculation of added values in the market. Then, for the participation of wind power plants (WPPs) and considering their uncertain production, a scenario-based method using real data and the Weibull distribution function is proposed. Also, considering WPPs may have a surplus energy in comparison to the network load in the condition of high wind energy penetration, which will be lost without use, in the modeling of WPPs, a mathematical variable as the curtailed wind energy is considered. With the simultaneous security-based coordination of adjustable speed PSHP units and WPPs in the unit commitment problem, the use of WPPs has become more effective. Also, the WPPs can participate in the market with higher capacity than the separate operation. The various numerical studies with increasing WPPs penetration factor are presented to demonstrate the effectiveness of the adjustable speed PSHP units for the IEEE 24-bus test system.