针对单一Copula函数在描述风速相关性时的限制性,通过引入mixCopula函数获取具有相关性的多维风速样本。引入条件风险价值理论,将风电功率的不确定性以经济性考量,建立了一种含多风电场的电力系统经济调度模型,协调经济性和安全性的问题。采用场景化理论对目标函数进行处理,使得计算得以简化。以含2个风电场的IEEE30节点系统为算例,分析风速相关性和置信水平对优化结果的影响,验证模型的合理性及有效性。

Considering the limitations of single Copula function, the mixCopula was introduced to analysis the wind speed correlations. To harmonize the contradictory between economy and safety, an economic dispatch optimization model for power grid containing multiwind farms was proposed. The model took the uncertainty in wind power under consideration based on conditional valueatrisk theory. In order to simplify the computation, the scene theory was allied to solve the model. Taking IEEE 30bus system with two wind farms as an example, the influence of wind speed correlations and the credit level on the results of probabilistically optimal power flow were analyzed, indicating the feasibility and efficiency of the proposed model.

TM 614

河北省高等学校科学技术研究项目(QN2016064)