基于MI-LSTM输电线动态参数修正的电力系统可用输电能力计算  

Available Transfer Capability Calculation of Power Systems Based on MI-LSTM Transmission Line Dynamic Parameter Modification

作　　者：秦爽 朱秋成 施宇丹 QIN Shuang;ZHU Qiucheng;SHI Yudan(Northeast Branch of State Grid Co.,Ltd.,Shenyang,Liaoning 110181,China;College of Architecture and Environment,Sichuan University,Chengdu,Sichuan 610065,China;College of International Education,North China Electric Power University,Baoding,Hebei 071003,China)

机构地区：[1]国家电网有限公司东北分部,辽宁沈阳110181 [2]四川大学建筑与环境学院,四川成都610065 [3]华北电力大学国际教育学院,河北保定071003

出　　处：《东北电力技术》2023年第11期1-6,共6页Northeast Electric Power Technology

摘　　要：电力系统架空线路参数受温度、湿度、光照、风雨雷电等复杂环境因素影响较大,传统可用传输容量计算往往利用输电线静态参数及固定的载流传输极限,忽略了环境影响下输电线参数及载流能力的动态变化。针对此问题,提出一种基于MI-LSTM输电线动态参数修正的可用输电能力计算方法。通过互信息量化不同时空状态下环境因素对输电线参数的影响程度,修正神经网络输入特征,实时预测输电线动态参数。利用动态参数修正传输线动态潮流极限并求取线路潮流,对电力系统可用输电能力进行计算。结合我国东北地区实际天气和线路参数数据,在IEEE14节点系统进行算例计算,验证所提方法的有效性。The parameters of overhead transmission lines in power system are greatly affected by complex environmental factors such as temperature,humidity,light,wind,rain and lightning.The traditional calculation of available transmission capacity is often based on the static parameters of transmission lines and the fixed current carrying transmission limit,ignoring the dynamic changes of transmission line parameters and current carrying capacity under the environmental impact.According to this problem,it proposes an available transfer capacity calculation method based on MI-LSTM transmission line dynamic parameter correction.Mutual information is used to quantify the influence of environmental factors on transmission line parameters under different spatial-temporal states,corrects the input characteristics of neural network,and predicts the transmission line dynamic parameter in real time.Dynamic parameters are used to correct the dynamic power flow limit of transmission line and calculate the line power flow,and the available transmission capacity of power system is calculated.Combined with the actual weather and line parameter data in Northeast China,the example is calculated in IEEE14 bus system to verify the effectiveness of the proposed method.

关 键 词：可用输电能力 互信息 长短期记忆神经网络 输电线动态参数 

分 类 号：TM744[电气工程—电力系统及自动化]