基于电力平衡的区域电网风电接纳能力研究

针对电力平衡的区域电网风电接纳能力问题,笔者根据电网调峰能力、风电同时率、系统备用容量和联络线调节率等影响因素,建立了风电接纳能力评估体系,提出了基于电力平衡的低谷时刻机组调峰裕度计算方法,即电网风电接纳能力的评估.以辽宁电网为例,依据电网电源负荷特性,分析了负荷低谷时刻风电接纳能力.结果表明,在冬季供暖期的负荷低谷时段,由于辽宁电网调峰能力制约,全网存在弃风现象,因此负荷低谷时段风电接纳能力即是全网风电接纳能力的极限。

Research on wind power receptiveness of regional grid based on power balance

Aiming at the wind power receptiveness of regional grid based on power balance, the author establishes the assessment system according to influential factors including network peak load regulation, wind power simultaneity, system reserve capacity and tie-line regulation and so on, and proposes the calculation method for unit peak load regulation margin based on power balance with valley load, which is the assessment of wind power receptiveness of grid. Tanking Liaoning grid as an example, the author analyzes, according to the characteristics of power source load, the ability of wind power receptiveness of grid with valley load. The result shows that since there is wind curtailment all over the network with valley load during heating period in winter due to the restrict of peak load regulation in Liaoning grid, the ability of integration approaches to the limit with valley load.