【摘要】 介绍了一种高精度交流采样远动终端的软、硬件设计，该远动终端硬件上采用压频转换（ＶＦＣ）技术与高性能单片机实现交流采样，软件上考虑了谐波、频率对测量精度的影响，并可自适应修正，使电压、电流、有功、无功测量精度都达到０．５级要求。该远动终端还带有ＬＯＮＷＯＲＫＳ网络接口，便于联网。更多还原

【Abstract】 The design of software and hardware for a high accuracy AC sampling remote terminal unit(RTU) device is presented in this paper. In the hardware, the Voltage Frequency Converter (VFC) and high performance CPU chip is used, the influence of harmonics and frequency on the accuracy of measurement is considered and can be adaptively corrected by software. The measurement accuracy for U, I, P, Q reaches the accuracy level of 0.5%. Besides, an interface for LONWORKS network is equipped in the RTU, so it can be easily interconnected.更多还原