基于电网经济效率评估的发电和输电协调规划方法研究

  目的  为了促进电力市场下发输电相互协调，提出了一种基于电网经济效率评估的发输电协调规划方法。  方法  随着电力市场改革逐步推进，发电侧的竞争更加多元化，售电侧也逐步放开，传统的电网规划的方法在电力市场环境下可能不再适用，从电源建设不确定性、系统潮流不确定性等多个方面，分析了电力市场新环境下，产生电源和电网发展不协调现象的主要原因。  结果  采用成本-效益法进行电网经济效率评估，通过对有/无该项目时的系统净收益进行计算，最终获得各项目的效益成本比BCR，并以此作为优化电源布局、电网项目决策的重要依据。  结论  建议可通过优化改进电网规划方法，建立电网经济效率评价体系，来促进电力市场下发输电相互协调。

Research on the Coordination Planning Method of Power Generation and Transmission Based on Economic Efficiency Assessment of Power Grid

［Introduction］ In order to promote the coordination of generation and transmission in the electricity market， this paper proposes a coordinated generation and transmission planning method based on economic efficiency evaluation of power grid.  Method  With the gradual advancement of the power market reform， the competition of generation side was more diversified and the selling side was gradually liberalized. Traditional planning methods of power grid might no longer be applicable in the power market. In this paper， the main causes of the inconsistency between power supply and power grid development under the new environment of power market were analyzed from the aspects of uncertainty of power supply development and power flow.  Result  The cost-benefit method to Evaluate Economic Efficiency is applied. By calculating the net benefit of the system with or without the project， the benefit-cost ratio BCR of each project is finally obtained， which is used to optimize the power distribution and serve as an important basis for the decision-making of power grid projects.  Conclusion  It is suggested that the coordination between generation and transmission in power market can be promoted by optimizing and improving the method of power grid planning and establishing an evaluation system of power grid economic efficiency.