A Strategy for Power System Stability Improvement via Controlled Charge/Discharge of Plug-in Electric Vehicles
For power system operators, this work offers a method to enhance grid stability using existing PEV infrastructure, though the approach is incremental.
The paper proposes a control strategy for plug-in electric vehicles (PEVs) that uses local frequency measurements to improve power system stability. Evaluations on IEEE test systems show that vehicle-to-grid (V2G) control enhances steady-state stability, expands the stability region, reduces frequency and voltage fluctuations, and increases critical clearing times.
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.