Modeling method of controllable loads with decentralized and PID+DD control systems for use in electric power transmission systems

摘要

Distributed generation based on renewable energy sources (RES) continues to increase in electric power system penetration. In order to mitigate stability issues caused by high penetration of these weather-dependent systems, some type of control is necessary. This paper proposes a method to model heat pump water heaters (HPs) and battery systems for a coordinated control strategy, which can be used to suppress perturbations caused by renewable energy source based distributed generators in high-voltage transmission systems. The loads are controlled with decentralized and autonomous control techniques in order to mitigate problems caused by high penetration of RES based distributed generators. The models of controllable loads have been simplified such that simulations of these highly nonlinear systems may be run in acceptable times. The effectiveness of the proposed control system is validated by simulation results in MATLAB/SimulinkTM.