1000 kV单双回路混接线路不平衡度研究

Study on Unbalance Degree of 1000 kV Single and Double Circuit Hybrid Transmission Line

对1000 kV单双回路混接线路的不平衡度进行了分析,采用最小二乘法拟合了电气不平衡度的限值边界线。通过拟合方程边界线或查看限值区域图形即可获知混接线路的电气不平衡度是否超过限值。两平行单回路的平行间距对不平衡度有影响,但平行距离大于150 m时可不考虑两平行单回路的耦合作用。输送功率对不平衡度有影响,随着输送功率的增大,混接线路的不平衡度变大。

The unbalance degree of 1000 kV single and double circuit hybrid transmission line is analyzed.The limit boundary line of electrical unbalance is fitted by the least square method.By fitting the boundary line of the equation or viewing the graph of the limit area,it can be known whether the electrical imbalance of the hybrid line exceeds the limit.The parallel spacing of two parallel single circuits has an impact on the unbalance,but when the parallel distance is greater than 150m,the coupling effect of two parallel single circuits can be ignored.The transmission power has an impact on the imbalance.With the increase of the transmission power,the imbalance of the hybrid line becomes larger.