计及分布式电源功率特性的微电网经济调度模型

针对微电网能量管理所获分布式电源(DG)运行点常常不满足DG功率特性的局限,提出了一种计及DG功率特性的微电网经济调度模型。该模型基于解析几何线性化DG的PQ功率极限,与微电网经济调度模型集成并求解,有效计及了逆变型DG、双馈感应发电机、同步发电机的功率特性。在多时间尺度微电网经济调度框架下,对某微电网系统进行算例分析,验证了所提模型的可行性以及有效性,并在此基础上分析了不同的分段数对DG运行点可行域覆盖率的影响。

Economic Dispatch Model for Microgrid Considering Power Characteristics of Distributed Generators

In allusion to the situation that the operating points of distributed generator (DG) cannot satisfy the power characteristics in microgrid energy management, a microgrid economic dispatch model which considers the power characteristics of DGs is established. The model, which linearizes PQ capacity limitation of DG based on analytic geometry, is solved. Such that it can effectively take the power characteristics of DG with voltage source inverter, doubly-fed induction generator and synchronous generator into account. In the framework of multi time-scale microgrid economic dispatch, the proposed model is verified on a microgrid system. Meanwhile the effects of different segments on the feasible region coverage of DG operating point are analyzed. This work is supported by National Natural Science Foundation of China (No. 51307063), and Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) of China (No. 20120172120042).