水火电力系统有功无功经济调度的研究

The Research of Real and Reactive Power Economic Dispatch in Hydro-Thermal Power Systems

本文在文献［１］的基础上，推导了水火电力系统同时实现有功、无功经济负荷分配的数学模型，并用分解协调法进行求解；提出了用于求解火电子系统有功经济负荷分配的新算法──区间寻优法；推导了一种求解无功负荷最优分配的解析迭代法。通过算例，验证了数学模型和计算方法的正确性及有效性。

Based on the complex loss coefficients proposed in [1],this paper presents a model of active-reactive economic dispatch in hydro-thermal electrical power systems.The optimal model is decomposed into active power subproblem and reactive power subproblem which are solved by coordination.A new algorithm called interval search is derived to solve the thermal active power subproblem with generation limits,and a new analytical method is given to solve the reactive power subproblem.Transmission losses and loss penalties are calculated by complex loss coefficients.In comparison with the classical approach,these methods are faster and of better convergence. The test result from a 81-bus hydro-thermal power system(the numbers of thermal power plants.hydroelectric stations.and reactive power compensation points are 7、5、and 4 respectively)shows that the proposed technique is effective and of better economy than classical one(decrease realpower loss by 15.29 percent).