A Static Voltage Security Region for Centralized Wind Power Integration—Part I: Concept and Method

Energies

Tao Ding¹  Qinglai Guo¹  Rui Bo²  Hongbin Sun¹ 

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

关键词: wind power;    voltage security region;    voltage control;    Monte Carlo simulation;    cascading tripping;   

DOI  :  10.3390/en7010420

来源: mdpi

【 摘 要 】

When large wind farms are centrally integrated in a power grid, cascading tripping faults induced by voltage issues are becoming a great challenge. This paper therefore proposes a concept of static voltage security region to guarantee that the voltage will remain within operation limits under both base conditions and N-1 contingencies. For large wind farms, significant computational effort is required to calculate the exact boundary of the proposed security region. To reduce this computational burden and facilitate the overall analysis, the characteristics of the security region are first analyzed, and its boundary components are shown to be strictly convex. Approximate security regions are then proposed, which are formed by a set of linear cutting planes based on special operating points known as near points and inner points. The security region encompassed by cutting planes is a good approximation to the actual security region. The proposed procedures are demonstrated on a modified nine-bus system with two wind farms. The simulation confirmed that the cutting plane technique can provide a very good approximation to the actual security region.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.