Practical Researches On Reactive Power Optimization

Power industry is the basic industry of national economy, and it has a significant impact on social production and people's lives. With the rapid development of China's national economy, social productive forces and people's living standards increase rapidly, and the scale of the grid also expands. However, due to the uneven distribution of resources and many other negative factors, it results in power supply unevenly distributed. Some areas may cause a serious shortage of reactive power. Voltage quality problems of our country have become increasingly prominent, and become one of the major power quality problems.The rudimentary study and research are carried out on the practical use of reactive power optimization in this thesis. The practical research of reactive power optimization includes two sub-problems, which are the optimization of reactive power control and reactive power planning.The optimal allocation of reactive power equipment program and no-load tap optimization settings programs is presented in this thesis, and effective solution to the reactive power planning is offered. The optimal allocation of reactive power equipment program gather reactive power loads of substation throughout the year to derive the optimal probability curve, then through statistical optimization method based on the optimal coverage method discrete reactive power system devices plan is offered. No-load tap optimization program uses a multi-set operation mode joint to optimize the grid tap stalls, and to get the best value of network using a variety of optimization technique. In this paper, two programs are calculated by the actual network data to give the conclusions. Optimal allocation of reactive power equipment, programs and no-load joint optimization settings program provides the reactive power voltage control system with daily data to solve problems in some planning difficulties of real-time control, while they can improve the effectiveness, coordination, economy in real-time system. This article describes principle of the primal dual interior point method and its lack, branch and presents bound method and its improvement. And it presents the original dual interior point method and branch and bound mixed method, improves the practical use of algorithm at the same time. In this paper, based on the hybrid algorithm a two-stage voltage control mode system is established and the system progress control on the voltage and power operation effectively. The hybrid algorithm is applied to the actual network operation, the result shows that the system can completely meet the requirements of real-time closed-loop control, and the control strategy can ensure the reliability, fast, and global optimality. The system can actually play a significant role in the power grid.