CAJ | 학술논문

全球能源互联网以其可再生、分布式、互联性、开放性和智能化等优势日益受到业界普遍关注，高压直流输电系统作为能源互联网中的基本组成元素，换流阀内部高电位区导体表面电场计算是实现小安全裕度下换流阀绝缘优化的关键。在实际运行的直流输电工程中，±800 kV直流换流阀塔内部电路触发板上的直流均压电阻温度过高，因此需对阀模块内部进行电路改造。为重新测量电路改造后阀塔内部绝缘的可靠性，采用SolidWorks建模软件建立阀塔3维模型；并结合逐次子模型技术，利用ANSYS有限元软件对阀模块内部元件的表面电场强度进行仿真计算；对比分析改造前后的阀模块内部电场分布情况。结果表明，阀模块内部整体电场分布合理，电场分布情况满足工程设计要求，最后提出针对电场薄弱环节的优化建议。
전구능원호련망이기가재생、분포식、호련성、개방성화지능화등우세일익수도업계보편관주，고압직류수전계통작위능원호련망중적기본조성원소，환류벌내부고전위구도체표면전장계산시실현소안전유도하환류벌절연우화적관건。재실제운행적직류수전공정중，±800 kV직류환류벌탑내부전로촉발판상적직류균압전조온도과고，인차수대벌모괴내부진행전로개조。위중신측량전로개조후벌탑내부절연적가고성，채용SolidWorks건모연건건립벌탑3유모형；병결합축차자모형기술，이용ANSYS유한원연건대벌모괴내부원건적표면전장강도진행방진계산；대비분석개조전후적벌모괴내부전장분포정황。결과표명，벌모괴내부정체전장분포합리，전장분포정황만족공정설계요구，최후제출침대전장박약배절적우화건의。
The concept of global energy internet has gained widespread concern by the industry for its advantages of renewability, distribution, interconnection, openness and intelligence. HVDC systems are an essential element of global energy internet. The surface electric field calculation of conductors in high-potential area inside the HVDC converter valve is the key to achieve optimal insulation under small margin of safety. In the practical operation of HVDC power transmission project, the temperature of DC equalizing resistance on the circuit board inside the ±800 kV HVDC valve tower is so high, therefore the circuit inside the valve module needs to be altered. In order to obtain the internal insulation reliability of valve tower after circuit alteration, a three-dimensional model of the converter valve tower is established by SolidWorks software and combined with successive sub-model technology, the surface electric field distribution of capacitors and radiators inside the valve module is calculated by using ANSYS finite element software. The comparative analysis of electric field distribution of valve module before and after alteration is made. The simulation results show that the overall electric field distribution of valve module is relatively reasonable, and the electric field distribution of a valve layer meets the design requirements. In the end, the optimization suggestion is proposed for the electric field weakness.