FPGA(field programmable gate array)has outstanding features of sufficient resources,flexible interface and parallel computing,especial the capability of parallel computing,which makes FPGA fit for application in high speed situation.Therefore,data acquisition in high speed can be implemented,using an external AD apparatus connected with FPGA,based on which data acquisition system is designed.In this paper,a high speed data acquisition circuitry is presented based on FPGA and an external AD chip,that is AD7864,which converts analog to digital very fast.The state machine design method of AD control is given based on the compile software of FPGA program,so is the time-sequence of AD7864.Finally,an experiment is carried out that the analog signal produced by signal generator is collected with data acquisition system designed in this paper,and its result provides verification of its good sampling function.

In the beginning of 2008,Jiangxi Power Grid was damaged by ice trouble.In this paper,traditional measures for natural disaster taken by grid operation department were analyzed.Moreover,detailed improvements were proposed in order to provide reference to grid operation and platform of emergency management.

阐述了2008年冰灾对江西电网造成的严重破坏,并针对电网运行部门应对自然灾害时的传统手段进行了总结分析,在此基础上对江西电网调度运行应急灾害措施进行了思考,并提出了一些具体改进措施,以期对调度运行部门在建设电网运行技术措施、灾害应急管理平台等方面能起到一定的参考作用.

In view of 660 MW unit trip of Fengcheng electric power plant II,we analyzed the accident,focused on the impact of operation stability of Jiangxi grid caused by this trip.Some instructive experience has been accumulated,and a efficacious method has been put forward to ensure the safety and stability of the grid.

结合江西电网基本特点及近年来的基本运行情况,分析了江西电网的调峰现状,并针对电网的实际运行情况,探讨调峰问题的解决途径。