配电网新能源消纳能力评估与工程应用研究

Research on Evaluation and Engineering Application of New Energy Consumption Capacity of Distribution Network

为了满足以新能源为主体的新型电力系统建设,需要不断提高各个电压等级电网的新能源消纳能力。通过对配电网新能源消纳能力影响因素和提升方法的研究,提出了基于多因素限制的区域配电网新能源能力评估方法,分别从高压电网、中压馈线和低压台区进行消纳能力分析,还提出了基于单位新能源提升投资效益的提升方案优选方法。通过分析,中压线路主要受到电压越限和热稳定的约束影响,高压电网主要受到主变容量、上级输电线路等的影响。最后,通过新能源消纳约束因素和计算模型,形成实用化的计算工具,结合不同因素对应措施与方法,对我国新型电力建设具有重要借鉴意义。

To adapt to the construction of a novel power system with new energy as the main body,it is necessary to continuously improve the new energy consumption capacity of various voltage-level power grids.Through the research on the influencing factors and improvement methods of new energy consumption capacity of distribution network,a new energy capacity evaluation method of a regional distribution network based on multifactor limitation was proposed,which analyzed the consumption capacity from the high-voltage power grid,medium-voltage feeder and low-voltage platform area,respectively.In addition,an optimal method of improving the investment efficiency based on unit new energy was also proposed.Through analysis,it is found that mediumvoltage lines are mainly affected by voltage crossing and thermal stability constraints.In contrast,high-voltage power grids are mainly affected by main transformer capacity and higher-level transmission lines.Finally,a practical calculation tool was formed through the constraints and calculation models of new energy consumption.Combined with the countermeasures and methods of different factors,the study has important reference significance for China's novel power construction.