A Risk-Based Stability Dispatch of High Wind-Penetrated Power Systems With Energy Storage

This paper proposes a multi-objective preventative-emergency coordinated control (MO-PECC) method for high wind-penetrated power systems. The method facilitates utility-grade energy storage (ES) to realize post-contingency emergency control, and can generate indicator of system instability risk for solution sets. Once an unstable post-contingency system is detected, the ES systems immediately react for power injection/retraction, thus achieving emergency control to alleviate short-term system power imbalance and stabilizing the system together with synchronous generators. Numerical tests are performed on a modified IEEE-39 system, in which 3 synchronous generators are replaced by 3 same-scale wind farms. The test results verified the effectiveness of the proposed coordinated method, and the calculating time is relatively small, which is suitable for online calculation.