CAJ | 학술논문

为分析天中线直流工程入地电流对当前哈密电网的影响，需建立哈密地区交流电网直流电流分布模型。基于场路耦合方法，根据哈密地区交流电网拓扑结构，将包括变压器、线路的地上模型和包括接地电阻、地表电位的地下模型结合起来，建立哈密地区交流电网直流电流分布模型。通过仿真计算和实地测量验证了模型的准确性，并得到了哈密电网采用当前运行方式下，部分变压器将存在严重的直流偏磁风险的结论。在哈密地区交流电网当前运行方式的基础上，提出合理的治理措施。通过仿真计算和实地测量，验证了针对当前哈密电网直流偏磁问题治理措施的有效性，最后对后续治理措施进行了探讨。
위분석천중선직류공정입지전류대당전합밀전망적영향，수건립합밀지구교류전망직류전류분포모형。기우장로우합방법，근거합밀지구교류전망탁복결구，장포괄변압기、선로적지상모형화포괄접지전조、지표전위적지하모형결합기래，건립합밀지구교류전망직류전류분포모형。통과방진계산화실지측량험증료모형적준학성，병득도료합밀전망채용당전운행방식하，부분변압기장존재엄중적직류편자풍험적결론。재합밀지구교류전망당전운행방식적기출상，제출합리적치리조시。통과방진계산화실지측량，험증료침대당전합밀전망직류편자문제치리조시적유효성，최후대후속치리조시진행료탐토。
To analyze the influence of grounding current in UHVDC transmission project from Tianshan to Zhongzhou on present Hami AC power system, it is necessary to establish a DC current distribution model in Hami AC power system. Based on field-circuit coupling method and according to topological structure of Hami AC power system, the overground model, in which the transformer and transmission lines are included, is combined with the underground model, in which the ground resistance and the surface potential are included, to built an AC and DC current distribution model for Hami region. The accuracy of the built model is validated by simulation computation and field measurement, and a conclusion that under current operating mode of Hami power system serious DC magnetic bias risk exists in a part of transformers is obtained. Based on current operating modes of Hami AC power system, reasonable treatment measures are suggested, and the effectiveness of the suggested treatment measures is validated by simulation computation and field measurement. Finally, follow-up treatment measures to cope with the risk are discussed.