基于ATP-EMTP的高压电缆回流线设置仿真研究

ATP-EMTP Based Simulation Study on Auxiliary Ground Wire in High-voltage Cables

为深入了解高压电缆工程中回流线的作用,利用ATP-EMTP仿真软件,按照工程中典型的敷设方式、正常工作电流和短路电流等条件,对有或无回流线的单、双回路电缆进行建模。根据规程规范的要求,对其中回流线的作用进行对比,分析线路正常运行和单相短路时回流线抑制感应电压效果,研究双回电缆共用回流线和利用并行回路电缆的金属护层做回流线的可行性。为降低线路正常运行时回流线的损耗,提出调整回流线布置的建议。

In order to study the effect of auxiliary ground wires in high-voltage cables,both the single-circuit and double-circuit power cables with or without an auxiliary ground wires are modeled respectively by ATP-EMTP simulation software under the conditions of typical laying mode,normal operating current and single phase short circuit current.According to requirements of relevant codes,the effects of an auxiliary ground wire on inhibiting induced voltage are analyzed respectively under the conditions of normal operation and single phase short circuit.The feasibility of double-circuit sharing an auxiliary ground wire and taking metal sheath of parallel cables as the auxiliary ground wires is studied.Suggestions are proposed on arranging auxiliary ground wires to reduce the power loss under normal operation.