| This dissertation makes up of two parts: 1) Apply primal-dual interior point method and predictor-corrector primal-dual interior point method to reactive power optimization problem. 2) Solve the high voltage problem of Zhejiang power system at light load by generator leading power factor operation.The measure of reactive power regulation mainly includes changing OLTC transformer taps, shunt capacitors susceptance and generator voltages. This paper proposed a mathematical model with the objective of the system losses, voltage quality and reactive allocation, which is solved by primal-dual interior point method or predictor-corrector primal-dual interior point method.The devices' safety and power system reliability of Zhejiang power system are threatened by high voltage at light load. In order to lower the higher voltage, measure such as generator leading power factor operation is taken. But the mean is limited by many factors, for example, generator design factor, system operating conditions and power system stability. Lots of calculation of many operation modes with seven reactive factors ranging between 0.92 and 0.98, under three load levels of 2000MW, 2500MW, 3000MW. Stability of each mode is checked. The result proves that the high voltage problem of Zhejiang power system be resolved by generator leading power factor operationIn the last of this dissertation, some examples and their calculating results are provided, which are obtained by applying the given algorithms. The correctness and efficiency of the algorithms are verified. |
