摘要
500kV金属氧化物避雷器(metal oxide arrester,MOA)仅采用均压环来改善电位分布,在国内超高压系统中应用广泛。由于避雷器在长期运行过程中容易出现电阻片老化、损坏及受潮等状况,因此需要建立正确完善的仿真计算模型对避雷器不同运行状况下的电位分布进行分析。首先利用ANSYS建立了500kV MOA的完整三维仿真模型,通过将正常运行时的电位分布仿真结果与现场试验结果对比,验证了该模型的合理性。之后研究了电阻片短路及受潮在静电场中的处理方法,从而对不同位置短路或受潮时的电位分布进行仿真计算,并从静电场的角度对仿真结果进行理论上的分析,验证了结果的正确性。
500 kV metal oxide arresters （MOA） ly use grading are widely used in domestic EHV systems, which on- ring to improve potential distribution. Since MOA is prone to aging, damage, damp and other conditions in the long-running process, it need to establish the correct simulation model to analyze the potential distribution of arrester under different operating conditions. Firstly established the com- plete 3D simulation model of 500 kV MOA using ANSYS, and verified the effectiveness of the model comparing the simulation results with the results of measuring in normal operation. Then the approach of short circuit and damp in electrostatic field is studied, in order to simulate and calculate the potential dis- tribution when short circuit or damp at different locations, the simulation results are analyzed theoretical- ly from the perspective of electrostatic field, the resuhs are verified to be correct.
出处
《电瓷避雷器》
CAS
北大核心
2017年第6期26-31,共6页
Insulators and Surge Arresters
基金
国家电网公司2015年科技项目"超特高压金属氧化物避雷器整体性能带电检测方法及故障判据研究及评估"
