高比例新能源电力系统稳定拐点释义

Discussion on Inflection Point for Power System Stability With High Proportion of New Energy Generation

为能够明确"十四五"电网规划的面临的问题和技术要求,根据我国电力系统稳定性主导类型,划分了我国电力系统发展的5个阶段;分析了拐点在数学上的明确定义和充分条件,并将其定性应用于电力系统稳定性拐点的定义,研究并提出了电力系统稳定性拐点存在的充分条件。分析了我国电力系统发展过程中存在的拐点。针对未来高比例新能源系统,按照送端、受端电力系统,以标准算例和实际算例,分析了未来受到稳定约束的最大新能源发电出力比例。提出提前采用新技术,构筑拐点,提升新能源接纳比例的建议。

In order to clarify the problems and technical requirements of the 14 th five year power grid plan, referring to the main types of power system stability in China, the power system development is divided into five stages. The definition and sufficient conditions of inflection point in mathematics are used to define the inflection point in power system stability, and the sufficient conditions for the existence of inflection point of power system stability are studied and proposed. The inflection points of power system stability in history are analyzed. For the power system with high proportion of new energy generation in the future, the maximum proportion of new energy generation that will be restricted by stability is studied with a standard example and a real power grid. Suggestions are put forward to adopt new technologies in advance and build inflection points so as to increase the proportion of new energy generation.