电网联络线路负线损原因分析及应对策略

Analysis and Countermeasures of Negative Line Losses in Power Grid Link Circuits

针对某电网跨省五回联络线出现负线损的问题,结合一次网架结构,研究分析其电气连接方式、运行环境等方面的共同特点,同步采集每一回联络线两侧关口计量点的P,Q,U和I实时运行数据,通过大量数据统计分析和运行环境仿真计算,选取具有代表性的线路作为研究对象,从计量系统综合误差、同塔电磁耦合影响潮流分布入手,分析负线损原因并提出解决问题的建议和办法。

In view of the problem of negative line losses in the power grid trans-provincial five link circuits, this paper combines with primary grid structure, studies and analyzes the common features of its electrical connections and operating environment, and simultaneously collects the real-time operational data for measuring points P, Q, U and I on both sides gateway of each link circuit. Through the statistic analysis of mass data and simulation calculations of operating environment, it selects the representative line as a research object, proceeds from the measurement system integrated error, the same tower electromagnetic coupling influencing the current distribution, analyzes the cause of negative line loss and proposes suggestions and countermeasures.