宁夏电力系统接纳新能源能力研究

Research on Ningxia Power Grid's Ability of Admitting New Energy Resources

宁夏风能、太阳能资源丰富,新能源发电发展迅速。根据宁夏新能源发电和负荷的历史统计数据、规划预测数据,详细分析了影响电网接纳新能源能力的相关因素,包括新能源出力特性、负荷特性、机组性能和外送通道,并指出新能源参与系统调峰,年电量损失较小;风电与光伏发电互补性差,不利于电网接纳;新能源并网通常会恶化负荷特性;直流外送将提高电网为新能源提供的调峰能力。这些结果为进一步研究宁夏电网接纳新能源能力、宁夏新能源并网调度运行奠定了基础。

Ningxia Hui Autonomous Region is rich in resources of wind energy and solar energy, so the new energy resources-based generation develops rapidly in Ningxia. According to the historical statistical data of new energy resource-based generation and load in Ningxia region as well as the prediction data of Ningxia power grid planning, the related factors impacting Ningxia region’s ability of admitting new energy resources, including output characteristics of new energy resources, load characteristics in Ningxia region, performance of generation units in Ningxia power grid and the channel to transmit power outwards from Ningxia power grid, are analyzed in detail. It is pointed out that when new energy resources take part in peak-load regulation the annual network loss can be reduced and the power transmission outwards by HVDC power transmission will arise the peak load regulation ability of new energy resource-based generation provided by power grid; however, the complementarity between wind power generation and photovoltaic generation is not satisfied and it is not favorable to power grid to admit new energy resource, otherwise, the load characteristic of power grid will usually be deteriorated under the connection of new energy source-based generation with power grid. These research results could be available for further research on Ningxia power grid’s ability to admit new energy resource-based generation and the dispatching of Ningxia power grid while new energy resource-based generation is connected to Ningxia power grid.