对电容性设备两种介损软件监测法的仿真分析  

Simulation Analysis on Two Methods of Software Monitoring for Dielectric Loss of Capacitive Equipment

作　　者：肖杰[1] 黎明 

机构地区：[1]四川宜宾电业局,四川省宜宾市644002 [2]重庆海吉科技有限公司,重庆市400030

出　　处：《电力设备》2005年第1期58-60,共3页Electrical Equipment

摘　　要：文章通过谐波分析及正弦波参数两种软件仿真法对电容性设备介损监测结果进行了分析比较,给出了在考虑采样精度、频率波动、相位漂移、零点漂移及谐波含量变化等影响因素时3种算法所得到的不同介损绝对误差仿真结果。指出谐波分析法和正弦波参数法均要求采样精度≥8位,但实际中采样精度取10位或12位均能满足tgδ监测要求;谐波分析法、正弦波参数法之正交算法在介损监测中可以不受零点漂移和谐波含量的影响,而正弦波参数法之最小二乘算法则受谐波含量、零点漂移的影响较大;相位漂移、频率波动对3种算法均存在影响,以最小二乘算法对频率波动的影响较小;谐波分析法与正弦波参数法之正交算法的仿真结果基本一致,能够满足介损监测的需要。The monitoring results of dielectric loss for capacitive equipment were analyzed through harmonic analysis and sine wave parameter methods,and the absolute error simulation results of different dielectric loss of 3 kinds of algorithm were given,considering the influencing factors such as sampling precision,frequency fluctuation,phase drift,zero shift and change of harmonic content.Pointed out that sampling precision of ≤8 bit is needed for harmonic analyses and sine wave parameter method,but sampling precision of 10 or 12 bit in reality can satify requirements of dielectric loss monitoring;the zero shift and harmonic wave content in dielectric toss monitoring had not influence on the orthogonal algorithm of harmonic analysis and sine wave parameter methods,and the zero shift and harmonic wave content had influecnce on the algorithm of least square of sine wave parameter method greatly;phase drift and frequency fluctuation had influence on 3 kinds of algorthm,the influence of frquency fluctuation for the algorithm of least square was less;the simulation results of the orthogonal algorithm of harmonic analysis and sine wave parameter methods were basically consistent and could satisfy the needs of dielectric loss monitoring.

关 键 词：电容性设备 介质损耗 在线监测 

分 类 号：TM53[电气工程—电器]