Analytical Assessment for Transient Stability Under Stochastic Continuous Disturbances

作者：Ju, Ping; Li, Hongyu^*; Gan, Chun; Liu, Yong; Yu, Yiping; Liu, Yilu

来源：IEEE Transactions on Power Systems, 2018, 33(2): 2004-2014.

DOI：10.1109/TPWRS.2017.2720687

• Energy function method
• stability probability
• stochastic averaging method
• stochastic continuous disturbances
• stochastic differential equations (SDEs)
• transient stability

With the growing integration of renewable power generation, plug-in electric vehicles, and other sources of uncertainty, increasing stochastic continuous disturbances are brought to power systems. The impact of stochastic continuous disturbances on power system transient stability attracts significant attention. To address this problem, this paper proposes an analytical assessment method for transient stability of multimachine power systems under stochastic continuous disturbances. In the proposed method, a probability measure of transient stability is presented and analytically solved by stochastic averaging. Compared with the conventional method (Monte Carlo simulation), the proposed method is many orders of magnitude faster, which makes it very attractive in practice when many plans for transient stability must be compared or when transient stability must be analyzed quickly. Also, it is found that the evolution of system energy over time is almost a simple diffusion process by the proposed method, which explains the impact mechanism of stochastic continuous disturbances on transient stability in theory.

• 出版日期2018-3
• 单位河海大学