高精度交流采样远动终端的研制

Development of remotely operated terminal for high - precision altermate current sampling

介绍了一种高精度交流采样终端的软、硬件设计,该采样终端在硬件上采用高性能单片机,实现交流采样。在软件上考虑基波频率偏移、谐波对测量精度的影响,进行自适应修正,同时采用动态零漂补偿技术,使电压、电流、功率和功率因数测量精度达到0.5级。抗干扰措施的采用使装置在运行中更加可靠。

The design of soft - and hardwares of a high - precision alternate current sampling terminal is dis-cussed,in which,a high performance single - chip computer is used as a sampling terminal. The effect of basie wave frequency drift and harmonics on measurement accuracy is taken into consideration, adaptive modification is incorporated in software, and dynamic zero drift compensating techniques are employed to achieve an accura-cy of 0. 5 level for measurements of voltage,current, power and power factor. The adoption of auti - interference measures makes the operation of the terminal more reliable.