基于火电分级调峰深度的西南水电跨省消纳空间分析

准确掌握受端电网清洁能源消纳能力,是实现清洁能源从富集区外送、跨网消纳的先决条件。在考虑送受电双方清洁能源消纳的基础上,以受端电网调峰火电机组为优化对象,建立了受电区外购电最大接纳空间测算模型。以某实际电网为算例,将火电调峰深度作为衡量电网调峰能力指标,以5%为梯度,设置了调峰深度40%~75%,共8个场景,测算了8种场景下西南水电最大消纳空间。结果表明:随调峰深度的逐渐增加,受端电网水电可接纳量增加,剩余负荷标准差较原始负荷显著下降;当火电调峰深度达到70%时,电网接纳能力达到最大。研究结果可为西南水电跨省消纳及后期辅助服务市场设计提供参考。

Analysis of Inter-Provincial Consumption Space of Southwest Hydropower Based on Thermal Power Classification Peak Shaving Depth

Accurately grasping the clean energy consumption capacity of the receiving end grid is the prerequisite for the delivery of clean energy from the clean energy-rich area and cross-grid consumption.Based on the consideration of the clean energy consumption of both the sending and receiving parties,and taking the receiving end grid peak shaving thermal power unit as the optimization object,this paper establishes a model for calculating the maximum acceptance space of purchased power outside the receiving area.Taking an actual power grid as an example,the peak shaving depth of thermal power is used as an index to measure the peak shaving ability of the power grid.A gradient of 5%is used to set a peak shaving depth of 40%to 75%in 8 scenarios.The maximum consumption space of hydropower in Southwest China is calculated in eight scenarios.The results show that with the gradual increase of the peak shaving depth,the hydropower acceptability of the receiving grid increases,and the standard deviation of the remaining load decreases significantly compared to the original load.When the thermal power peak shaving depth reaches 70%,the grid acceptance capacity reaches the maximum.The research results can provide a reference for the cross-provincial consumption of southwest hydropower and the design of auxiliary service market in the later period.