基于粒子群辨识的高压架空ACCC导线载流温升模型

Current-Temperature Model of ACCC Conductors Based on PSO Identification Method

架空导线载流温升模型是线路动态增容决策、安全运行状态监测和载流量评估等领域的理论基础。但由于碳纤维复合芯导线(ACCC导线)与传统架空导线在材料、结构及运行温度上的差异,使得当前的载流温升计算模型无法直接应用于ACCC导线,限制了ACCC导线动态增容的发展和输电潜力的挖掘。为此,本文根据热平衡原理和热电类比理论建立了ACCC导线的载流量温升模型,并利用粒子群优化算法对模型参数进行了辨识求解。设计了ACCC导线载流温升实验平台,在自然对流条件下对其热动态过程进行了实测和模拟。结果表明,粒子群辨识方法可有效辨识出模型参数,该模型在计算导线温升过程上具有较高的精度。

The current-temperature model of overhead conductors has used as the theoretical foundation of various areas, such as dynamic capacity-increasing decision, safe operation monitoring and ampacity evaluation. However, ACCC conductor is different from traditional overhead conductors on material, construction and operating temperature. Consequently, the current model cannot be directly applied to ACCC conductor, which has limited the development of dynamic capacity-increasing and the promotion of transmission capacity for ACCC conductor. This paper proposed the current-temperature model for ACCC conductor considering thermal equilibrium principle and thermoelectricity analogy theory. And then PSO identification method was used to identify the model parameters. Finally, a temperature rise experiment platform for current-carrying ACCC conductor was established to measure and simulate the dynamic thermal process of ACCC conductor within natural convection condition. The result shows that the model parameters can be obtained effectively by PSO identification method, and the model is high in precision while calculating the temperature rising process for ACCC conductor.