计及可再生能源发电成本的智能电网分布式经济调度

Fully distributed economic dispatch for a smart grid considering operation costs of renewable generators

针对包含可再生能源发电单元、常规发电单元与储能单元的智能电网经济调度问题,提出一种计及传输损耗的智能电网最优经济调度模型,该模型实现对传输损耗与可再生能源发电单元运行成本的计量;其次,采用Lagrange乘子法推导此优化问题的协调方程,并通过解析的方式分析发电单元的出力协调关系;然后,提出一种完全分布式算法以有效求解此经济调度问题,该算法不仅能够有效减少计算和通信负担,还能在很大程度上保护发电单元隐私;最终,基于IEEE-30母线系统的3个算例验证所提分布式算法的正确性与有效性。

To address economic dispatch problem of a smart grid with renewable generators, conventional generators and power storage units, an optimal economic dispatch model considering transmission losses is proposed, where operation costs of renewable generators and transmission losses are established. Besides, the coordination equation of the formulated non-linear optimization problem is deduced by adopting Lagrangian multiplier method, where the output coordination relationship of different generators is clearly illustrated in an analytic way. Then, a fully distributed algorithm is presented to effectively solve the economic dispatch problem, which can not only decrease computation and communication burdens but also protect the privacies of generators to a large extent. Finally, simulations performed on three case studies demonstrate the correctness and effectiveness of the proposed method in IEEE-30 bus system.