Frequency Regulation Power Allocation Method for Electric Vehicles Coordinated with Thermal Power Units in AGC

Abstract

In order to make better use of the excellent Frequency Regulation (FR) performance of Electric Vehicles (EVs), this paper focuses on the FR power allocation method for EVs coordinated with thermal power units in Automatic Generation Control (AGC). The real-time dispatchable power of large-scale EVs in the form of the aggregator is calculated based on the single EV dispatchable power calculation model. The obtained real-time dispatchable power is used to coordinate with thermal power units participating in the AGC performance assessment through the time-period partitioning control strategy. By piecewise linearizing the battery life loss model, the life loss and the dispatchable power of EVs are integrated to allocate the FR power for EVs in the aggregator. Through the analysis of case, EVs can participate in the AGC performance assessment coordinated with thermal power units well based on the time-period partitioning control strategy. The method proposed in this paper has the better ability in the life loss and solution speed compared with the traditional power allocation strategy to prove its effectiveness.