三端柔性环网控制装置的功率调度模型与边界条件研究

应用柔性环网控制装置将多个交流配电网互联形成环网,具有实现系统有功无功独立解耦控制、提高系统安全性、降低运行风险等优点。基于此提出了一种三端柔性环网控制装置的功率模型和边界条件,用于配电网的功率调度。首先,通过搭建用于调度的三端柔性环网控制装置的模型,得到其功率关系式。然后,对功率调度的边界条件进行了理论分析,通过理想化模型得到了工程实践中所需的功率调度范围,同时建立了考虑综合安全边界条件的功率调度模式。针对两种情况,提出了能够满足不同条件的功率分配结果。最后,通过仿真结果,验证了三端柔性环网控制装置功率调度模型与边界条件的有效性。

Research on power dispatch model and boundary condition of three-terminal flexible loop network controller

Flexible Loop Network Controller (FLNC) is applied to interconnect multiple AC distribution networks into a loop network, which can realize active and reactive power independent decoupling control, improve system security, decrease operating risks, etc. On this basis, a power model and boundary conditions of three-terminal FLNC for power dispatch of distribution network is presented. First, through building the model of three-terminal FLNC for power dispatch, the power relationship formula is presented. Second, the boundary conditions of power dispatch are theoretically analyzed. Then, the scope of power dispatch needed in engineering practice is obtained through an idealized model, and the power dispatch modes considering comprehensive security boundary conditions are established. According to two different situations, the power allocation results which can meet the different conditions are proposed. Finally, the simulation results verify the effectiveness of the three-terminal FLNC power dispatch model and the boundary conditions. This work is supported by National High-tech R & D Program of China (863 Program) (No. 2015AA050102).