Issues for Power System Operation for Future Renewable Energy Penetration

A concept of Robust Power System Security and its application under renewable energy sources penetration

“…DF is defined as the region where generators can reach with maximum usage of power supply capacity from u 0 of generators output power at t to u 1 at t+δt based on electric power demand forecast p 1 . A sequential calculation method of DF is given in [21][22][23] taking into account upper and lower limitation of generator output power, ramp-rate constraint and power demand and supply balance constraints based on load forecast. We introduce concept of uncertainties to DF for consistency with RSS.…”

“…At present, we can find RDS rather widely, because of small uncertainties and small load forecast error. But in the future with large amount of RES penetration, it is anxious about shrinkage or disappearance of RDS [21][22][23]. In order to avoid this situation, it is necessary to operate power plants or storage batteries properly for balancing electric power supply and demand.…”

“…In this paper, we deal with the unpredictable uncertainties caused by RES and solve the above problem by extending the previous studies in [21][22][23]. The conventional N-1 security criterion is extended to define a new criterion, N-1 Robust Power System Security (RS).…”