提高电能表现场校验仪抵御温度干扰能力的技术

Technology Research on Improving Anti-temperature Interference for Watt-hour-meter Field Calibrator

受高低温环境温度的影响，电能表现场校验仪的现场测量精度可能会显著下降，无法做出正确检定。通过对电能表现场校验仪的测量原理和硬件结构的深入分析,揭示了高低温环境对校验仪测量精度的影响机理，提出了一种基于关键元器件温漂系数综合优化的改进方案，并研制了样机。试验结果表明。在-30～55℃，样机均能够保持0．05S级准确度，平均温度系数不超过0．08‰/℃。

Influenced by high or low environment temperature, measurement accuracy of watt-hour-meter calibrator may decrease significantly and unable to calibrate correctly. Based on measuring principle and hardware structure of watt-hour-meter field calibrator, mechanism of environment temperature influence on measurement accuracy is analyzed. A novel hardware improvement scheme is proposed based on temperature coefficients optimization of key electrunical components. The experimental results on prototype equipment show that average temperature coefficient is less than 0.08‰/℃. The prototype meets 0.05S measuring precision in temperature ranging from -30 ℃ to 55 ℃.