高占比可再生能源系统消纳能力指标评估与分析

提出定量评估高占比可再生能源系统消纳能力的指标方法。综合考虑机组出力上限、负荷水平、网架结构和允许潮流等约束条件,从电网经济性、安全性和固有特性三方面分析可再生能源在系统中的适应性和消纳情况。推导定量评估可再生能源消纳能力的指标——待消纳占比的表达式,结合算例给出评估结论。结果表明该指标方法用于分析可再生能源消纳能力具有合理性、简便性和可操作性。

Index analysis and evaluation of high proportion renewable energy system

Research the quantitative evaluation of the renewable energy in distribution network. First of all, establish the optimization model to calculate the best output power consumption of renewable energy units. Taking into account the local unit output ceiling, load level, grid structure, power flow as well as other constraints, making the renewable energy unit output as large as possible, the consumption as low as possible while the profits as high as possible. Secondly, define the assessment indicators and analyze them around the index. Evaluate the results of comparison on the results of the optimization model with the actual power. Based on the indicators, the consumption capacity involves the power grid economy, security and inherent characteristics of the system. Finally, an explicit expression of the index is derived from the solution without using the conventional iterative algorithm. The rationality, simplicity and operability of the index are given.