A Static Voltage Security Region for Centralized Wind Power Integration—Part II: Applications

Energies

Rui Bo¹  Tian-en Huang²  Tao Ding²  Qinglai Guo²  Hongbin Sun²  Boming Zhang² 

[1] Midwest Independent Transmission System Operator (Midwest ISO), St. Paul, MN 55108, USA;State Key Lab of Power Systems, Department of Electrical Engineering , Tsinghua University, Beijing 100084, China;

关键词: wind power;    voltage security region;    inner point;    near point;    optimization;    Monte Carlo simulation;    N-1 contingency;    cascading tripping;   

DOI  :  10.3390/en7010444

来源: DOAJ

【 摘 要 】

In Part I of this work, a static voltage security region was introduced to guarantee the safety of wind farm reactive power outputs under both base conditions and N-1 contingency. In this paper, a mathematical representation of the approximate N-1 security region has further studied to provide better coordination among wind farms and help prevent cascading tripping following a single wind farm trip. Besides, the influence of active power on the security region is studied. The proposed methods are demonstrated for N-1 contingency cases in a nine-bus system. The simulations verify that the N-1 security region is a small subset of the security region under base conditions. They also illustrate the fact that if the system is simply operated below the reactive power limits, without coordination among the wind farms, the static voltage is likely to exceed its limit. Atwo-step optimal adjustment strategy is introduced to shift insecure operating points into the security region under N-1 contingency. Through extensive numerical studies, the effectiveness of the proposed technique is confirmed.

【 授权许可】

Unknown