A Strategy for Power System Stability Improvement via Controlled Charge/Discharge of Plug-in Electric Vehicles

TL;DR

This paper proposes a control strategy for plug-in electric vehicles to enhance power grid stability by utilizing V2G technology and local frequency measurements, demonstrated on standard power system models.

Contribution

It introduces a novel local measurement-based control method for PEVs to improve grid stability through V2G, validated on IEEE power system models.

Findings

Enhanced steady-state stability

Reduced frequency and voltage fluctuations

Extended critical clearing times

Abstract

Plug-in electrical vehicles (PEV) are capable of both grid-to-vehicle (G2V) and vehicle-to-grid (V2G) power transfer. The advantages of developing V2G include an additional revenue stream for cleaner vehicles, increased stability and reliability of the electric grid, lower electric system costs, and eventually, inexpensive storage and backup for renewable electricity. Here we show how smart control of PEVs can improve the stability of power grids using only local frequency measurements. We evaluate the proposed control strategy on the IEEE Case 3 and the IEEE New England power systems. The results show that V2G leads to improved steady-state stability, larger region of stability, reduced frequency and voltage fluctuations during transients and longer critical clearing times.