摘要
针对由真实二次设备构成的仿真变电站,提出了解析式仿真与解析变换器相结合的变电站一次系统仿真思想。把变电站一次系统等效为一个三阶系统,用正弦指数型解析表达式描述其各点的电气量;利用Altera公司的EP3C25FPGA芯片和德州仪器公司的AD5348D/A转换芯片搭建解析转换器;采用直接数字频率合成技术,精确控制实现状态转换的动作信号,使解析转换器的输出信号与理论计算相符。实例测试表明:解析转换器工作稳定,真实二次设备运行正常,能满足变电站培训仿真系统的需求。
A new simulation of substation primary system, based on the analytical simulation and the analytical signal converter （ASC）, is proposed for the simulative substation composed of real secondary devices. The primary system of substation is simplified to third-order system and sinusoidal-exponential analytical expressions are employed to describe electrical variables. EP3C25 （Altera＇s FPGA chip） and AD5348 （TI＇s D/A converter） are used in the design of ASC. Direct digital frequency synthesis and precisely control of state-transition command signal enable the outputs of ASC correspond with theoretical calculation. Prototype tests show that ASC operates stably and secondary system devices run correctly, which can meet the requirements for substation simulation and training system.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第22期146-150,共5页
Power System Protection and Control
关键词
仿真变电站
真实二次设备
解析转换器
FPGA
直接数字频率合成
simulative substation
real secondary devices
analytical signal converter
FPGA
direct digital frequency synthesis
