摘要
电铁的高速发展同时带来了严重的电能质量问题,其中线性负荷下精度较高的时分割乘法器(TDM)在电铁的影响下是否会产生计量误差成为了供用电双方关注的问题。对TDM原理和电气化铁路的负荷特征进行了理论分析,进而在simulink中搭建了电铁负荷模型,在此基础上通过仿真实验研究了电铁负荷造成的谐波、冲击性以及电压波形突变等三个方面对TDM的影响,同时分析了TDM采用不同的调制频率时在电铁负荷下的误差情况。并通过实际数据与数字式乘法器进行了对比。以上工作得出TDM在电铁负荷下会产生原理性负误差,但在调制频率适当时可达到需要的精度,且在原理上比数字式乘法器更适合用于电铁计量。这一结论为电气化铁路下的计量方式研究提供了参考。
With the development of electrified railway nowadays, the electrified influence on time-division multiplayer （TDM） is drawing more and more concern. The theory of TDM and the electrified railway load is analyzed in this article, and then an emulation model of electrified railway is constituted in Simulink. Using simulation result and operation data, a contrast is made between TDM and digital multiplayer. As a result, the TDM shows negative error under the railway load, but the precision can reach the application requirement by using proper modulation frequency, and it is better than the precision of digital multiplayer under the railway load. This conclusion is useful in further research of power measurement in electrified railway.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2009年第1期28-32,共5页
Power System Protection and Control
