Xinhui Du

Publications (3)2.68 Total impact

• Article: Reactive Power Aspects in Reliability Assessment of Power Systems

  Wenping Qin, Peng Wang, Xiaoqing Han, Xinhui Du
  [show abstract] [hide abstract]
  ABSTRACT: Reactive power plays a significant role in power system operation. However, in reliability evaluation, attention has seldom been paid to reactive power. In conventional power system reliability evaluations, the fixed maximum and minimum values are applied as the reactive power limits of generators. Failures of reactive power sources are rarely considered. The detailed causes of network violations for a contingency are also seldom studied. Real power load shedding is usually used to alleviate network violations without considering the role of reactive power. There are no corresponding reliability indices defined to represent the reactive power shortage in the existing techniques. Reactive power shortage and the associated voltage violations due to the failures of reactive power sources are considered in this paper. New reliability indices are proposed to represent the effect of reactive power shortage on system reliability. The reliability indices due to reactive power shortages have been defined and are separated with those due to real power shortages. Reactive power limits determined by real power output of a generator using P-Q curve have been studied. A reactive power injection technique is proposed to determine possible reactive power shortage and location. The IEEE 30-bus system has been modified and analyzed to illustrate the proposed technique. The results provide system planners and operators very important information for real and reactive power management.
  IEEE Transactions on Power Systems 03/2011; · 2.68 Impact Factor
• Conference Proceeding: Application of Neural Network and Support Vector Machines to Power System Short-term Load Forecasting.

  Xinhui Du, Liang Wang, Jiancheng Song, Yan Zhang
  International Conference on Computational Aspects of Social Networks, CASoN 2010, Taiyuan, China, 26-28 September 2010; 01/2010
• Conference Proceeding: Impact of dynamic loads on stability of Shanxi Power Grid

  Xiaoqing Han, Xiaoru Yang, Jiancheng Song, Xinhui Du
  [show abstract] [hide abstract]
  ABSTRACT: The relationship between voltage and rotor angle is one of the important issues in power system stability. The influences of induction motor percentages and under-voltage load shedding on stability of Shanxi power grid (SPG) are investigated in this paper. Demonstration shows that under- voltage load shedding enhances voltage stability, but it makes the curve of rotor angle swing greatly. The analysis shows that precise conclusion can be obtained by considering the effect of induction motor in the stability analysis of power system.
  Power Engineering Conference, 2007. IPEC 2007. International; 01/2008