如何大规模抄读低压用电用户电量是电力行业一直以来研究的热点和重点。随着阶梯电价的推行，用户对电力数据采集的实时性、准确性、完整性提出了更高的要求，社会迫切需要能够远距离抄表且准确率高、安全可靠的电力抄表 系统。因此，研究基于广播校时和现代通信技术的电能计量新方法，具有重要现实意义。本论文设计了广播校时远程集中低压电力抄表改进系统，与现有远程集中低压电力抄表系统相比，该系统性能有显著提高。论文主要工作如下： （1）对广播校时远程集中低压电力抄表系统总体方案进行了设计。基于电量计量理论、电力载波通信技术等基础原理，研究了自动抄表系统的基本构成，分析了电力系统的校时要求，提出了改进的系统总体方案。 （2）对系统主站授时接收模块进行了设计改进。硬件部分基于GPS/北斗双校时模块进行时钟报文的接收，并进行相应的电路设计，软件部分设计了授时接收模块的主程序、时钟源选择、卫星同步失步信号的判断程序。 （3）对系统集中器进行了软硬件改进。改进了现有集中器主控处理模块，用32位的ARM芯片LPC247处理器实现任务调度和数据处理，并进行了显示、内部时间、数据交互、扩展存储等功能模块的硬件设计以及电量读写的软件设计。 （4）对系统集中器通信方案改进设计。实现了低压电系统中通信方式和通信协议，上行通信方式有以太网通信、GPRS通信、RS232通信方式；下行通信方式有电力线载波通信、RS485通信、433MHZ通信方式等。 此外，利用BP神经网络对供电折损率进行了仿真实验，从理论上验证了广播校时低压电力抄表系统改进系统的有效性和正确性。最后，并制作测试电路板样机对设备进行联调，验证了该系统的有效性。

How to read large low voltage user power has been the focus and emphasis of research in power industry. With the implementation of the price ladder， usersput forward higher requirements for the real time，accurity and integrity of electric power data acquisition.The urgent need of the society can be the accurate， safe and reliable power meter reading system. Therefore， it has the important practical significance to research on electric energy metering method based on broadcasting timing and modern communication technology. This thesis designs an improved system for low voltage power， compared with the centralized low power remote meter reading system， the system performance is improved significantly. The main works are as follows. (1) Overall scheme is designedfor broadcasting remote centralized low-voltage power meter reading system. Based on electricity metering theory and power carrier communication technology， improved system scheme is presented. The basic composition of the automatic meter reading system is studied， and the timing requirements of the power system are analyzed. (2) Master station timing receiver module design is improved. The hardware partsfinish the clock message receptionand the corresponding circuit design， which is based on the GPS / Beidou double timing module. The software parts design the main program， clock source selection， satellitesynchronization and loss of synchronization judgment. (3) Power meter reading concentrator is designed in hardware and software.The existing concentrator master processor module is improved， the 32-bit ARM chip LPC247 processor is used to achieve task scheduling and data processing. And the display， internal time， data interaction， extended storage and other functional modules are finished in hardware， and software design of electric energyreading is given. (4) Design of concentrator communication scheme is improved.Low-voltage system communication mode and communication protocol are designed. Uplink communication methods are Ethernet communication，GPRS communication，RS232 communication; downlink communication methods are power line carrier communication,RS-485 communication and 433MHZ communication. In addition, the BP neural network is used to simulate the power supply loss rate, and the validity and correctness of the improved system of low voltage power meter reading system are verified theoretically. Finally, the test circuit board prototype was fabricated to verify the effectiveness of the system. Finally，the software function simulation of the low voltage power concentrator is carried out based on Proteus EDA tools，and the prototype of the test circuit board is tested to verify the effectiveness of the system.