考虑新能源不确定性的互联电网交换功率鲁棒优化模型

高比例新能源及其不确定性增加了多区域交流互联系统交换功率控制的难度，为保证区域间联络线传输功率的协调分布及其波动相对均衡，提出了一种考虑互联电网外特性的交换功率稳定控制模型。考虑互联系统自动发电控制(AGC)参与因子与联络线潮流分布的关联关系，推导并构建了互联系统AGC下的潮流模型。进而，以联络线功率波动幅值最小为目标函数，建立了基于鲁棒优化的区域交换功率稳定控制模型，并提出了一种基于松弛法的协同演化算法对该模型进行求解。以双IEEE 14节点和IEEE 118节点测试系统为例进行仿真分析，将无优化与鲁棒优化计算结果进行对比，结果表明鲁棒优化可以有效应对新能源随机出力的影响，对于外特性的稳定性具有明显改善效果，并验证了所提算法的有效性和实用性。

Exchanging power robust optimization model of interconnected grid considering uncertainty of new energy

The high proportion of new energy and its uncertainty increase the difficulty of exchanging power control in multi-area AC interconnected system. In order to ensure the coordinated distribution and the relative balanced fluctuation of the transmission power on inter-regional tie lines, an exchanging power stability control model that considers the external characteristics of interconnected grid is proposed. Considering the relationship between AGC(Automatic Generation Control) participation factors of interconnected system and the power flow distribution of tie line, the power flow model under AGC control of interconnected system is derived and constructed. Furthermore, a robust optimization-based regional exchanging power stability control model is established with the minimum power fluctuation amplitude of tie line as the objective function, and a co-evolution algorithm based on relaxation method is proposed to solve the model. Taking two parallel IEEE 14-bus systems and IEEE 118-bus system as the test examples to carry out the simulation analysis and comparing the calculation results between without optimization and with robust optimization, it is concluded that robust optimization can effectively deal with the impact of random output of new energy, it has an obvious improvement effect on the stability of external characteristics, and the effectiveness and practicability of the proposed algorithm are verified.