基于动态拓扑的变压器档位电压控制方案

Voltage control scheme of transformer tap based on dynamic topology

海外变电站多变压器并联运行条件下,一次设备跟随运行方式变化动态分组。每个分组独立调节变压器分接头控制母线电压,以此达到母线电压和环流均满足目标要求。本文提出一种变压器档位电压控制方案,扫描一次主接线图,采用广度优先搜索算法生成拓扑分组。拓扑分组中变压器环流采用导纳法计算,跟踪电压和环流大小,采用贪婪算法调节电压和限制环流大小。仿真试验和现场运行表明,该方案具有架构成熟、拓扑适应性强以及调节算法收敛的特点,具有一定的创新性和实用价值。未来将进一步深入研究在各种主接线方式下的变压器档位调节方案,为海外工程推广积累经验。

Under the condition of multi transformer parallel operation in overseas substations,the primary equipment is grouped dynamically according to the change of operation mode.Each group independently regulates the transformer tap to control the bus voltage,the bus voltage and circulating current meet the target requirements.In this paper,a voltage control scheme of transformer's tap is proposed,which scans the power grid diagram and uses BFS algorithm to generate topological groups.In the topological grouping,the transformer circulation is calculated by admittance method,and the voltage and circulation are tracked.The greedy algorithm is used to control the voltage and limit the circulation.Simulation test and operation test show that the scheme has the characteristics of mature architecture,strong topology adaptability and convergence of regulation algorithm,and has considerable innovation and practical value.In the future,further research will be carried out on the transformer tap control scheme under various power grid diagram to accumulate experience for overseas project promotion.