Design Of Three Phase Multi-function Energy Meter Based On 71M6513

At present, "special measure chip + MCU " dual-core structure solution is taken by most of the multi-function energy meter. It has complete functions and superior performances. But the meter has many problems as the matching of two cores and the reliability of data transmission and so on. By using the common MCU, the overall system has a larger number of chips,and the cost of meter can not be radically reduced. The purpose of this paper is to further reduce the cost and improve the reliability of system.This paper adopted a single chip SoC (System on Chip) energy meter solution.The three phase multi-function meter based on this solution has many advantages such as superior in performance, reliable in working, versatile in function. It has many functions suce as multi-parameter measurement , real-time clock and multi-rate, event records, load records, electric pulse output, optoelectronic and RS-485 communications and so on. because of the characteristics above and the low cost, it has a broad market prospect.This thesis consists of 7 chapters. The first chapter introduced the development course of energy meter, analysed the current research and development trend of multi-function meter, discussed the research meaning of electronic multi-function Meter based on a high-performance single-chip SoC, pointed out the main tasks of this paper. The second chapter introduced in detail the structure and characteristics as well as working principle of 71M6513, expounded the chip's advantages and disadvantages in the application, discussed the design of the function and hardware structure of three phase multi-function meter. The third chapter described the design of measurement unit. The fourth chapter introduced the software development environment and operating platform, discussed the principles of modular software design, focused on the design of system management software. The fifth chapter discussed the error analysis and correction, as well as the reliability design. The sixth chapter focused on the measurement method of the meter testing, gave the test data under active balance load, introduced the operation of the meter. Finally, the working of this thesis was summarized, and the improvement methods were proposed.The production practices shows that this meter based on 71M6513 works reliability, meets relevant standards at home and abroad.