CAJ | 학술논문

为量化分析高压直流输电入地电流（简称直流电流）在交流电网内的分布,提出了直流分布的完整理论分析模型,实现了变电站地下网络的Thevenin等效;借助潮流计算数据取得交流电网的接线信息,开发了潮流计算接口,解决了现代大型交流电网接线运行方式的数据输入问题。运用随机模拟试验方法探讨交流电网直流分布的机理,分析了交流电网内的直流电流的分布规律：交流电网规模越大直流电流分布越广;杆塔-避雷线系统的存在会使交流电网直流电流分布密集;采用抑制措施后交流电网局部直流电流分布可能更加密集,但直流电流分布总量下降。仿真软件适用于大型交流电网直流电流分布的预测计算和抑制措施的仿真评估,可以为更好地分析、预报和抑制直流电流分布及其不良影响提供参考。
위양화분석고압직류수전입지전류（간칭직류전류）재교류전망내적분포,제출료직류분포적완정이론분석모형,실현료변전참지하망락적Thevenin등효;차조조류계산수거취득교류전망적접선신식,개발료조류계산접구,해결료현대대형교류전망접선운행방식적수거수입문제。운용수궤모의시험방법탐토교류전망직류분포적궤리,분석료교류전망내적직류전류적분포규률：교류전망규모월대직류전류분포월엄;간탑-피뢰선계통적존재회사교류전망직류전류분포밀집;채용억제조시후교류전망국부직류전류분포가능경가밀집,단직류전류분포총량하강。방진연건괄용우대형교류전망직류전류분포적예측계산화억제조시적방진평고,가이위경호지분석、예보화억제직류전류분포급기불량영향제공삼고。
In order to analyze the HVDC transmission's earth-return current distribution in AC power grids,an improved theoretical model is set up realizing the Thevenin equivalence of underground networks.A power flow calculation interface is developed to load data of the connection of modern large-scale AC grid.Then the random test method was used to summarize the rules of DC current distribution.The results are gained as follows:the larger the AC grid,the more the DC current distribution is caused;the DC current distribution is increased by towers and overhead ground wires;though the local DC current distribution is increased,the total DC current distribution is suppressed by mitigation methods.The simulation software is suitable for DC current distribution computation and evaluating the mitigation methods,and it provides reference for analysis,forecast,mitigation,and adverse effects of DC current distributions.