1000kV串联式标准TV的量值溯源及稳定性

Traceability and Stability of 1000 kV Series Standard TV

为了研究1000 kV串联式标准电压互感器(SSTV)的误差性能,使其满足特高压电网建设中开展电压量值溯源及传递工作的需要,通过分析1000 kV SSTV的结构特点及误差原理,提出半绝缘互感器电压加法溯源的方法。试验结果表明,采用该方法与传统的电压系数法对同一台1000 kV SSTV进行量值溯源测量的一致性优于3×10-5。并基于数学模型和试验数据,分析了1000 kV SSTV的误差性能受杂散电容的影响。结果表明,杂散电容对误差的影响量<4×10-6。

In order to study the error performance of 1000 kV series standard voltage transformer （SSTV） to meet the needs of the voltage measurement traceability and transfer in the construction of ultra-high voltage power grid, a traceability method of semi-insulating transformer voltage summation is proposed by analyzing the structural features of 1000 kV SSTV and error principle. Test results show that the consistency is higher than 3 ×10^-5 by adopting the measurement of traceability methods with semi-insulating transformer voltage summation and traditional voltage coefficient on the same prototype of 1000 kV SSTV. Moreover, the influence of stray capacitance on error performance of 1000 kV SSTV is analyzed based on mathematical models and experimental data. The results show that the influence quantity of stray capacitance on the error performance is lower than 4 × 10^-6.