| Title |
Development and Performance Test of DC Smart Metering System for the DC Power Measurement of Urban Railway |
| Authors |
정호성(Jung, Hosung) ; 신승권(Shin, Seongkuen) ; 김형철(Kim, Hyungchul) ; 박종영(Park, Jongyoung) |
| DOI |
https://doi.org/10.5370/KIEE.2014.63.5.713 |
| Keywords |
DC voltage sensor ; DC current sensor ; DC smart meter ; DC smart metering system ; Urban rail transit |
| Abstract |
DC urban railway power system consists of DC power network and AC power network. The DC power network supplies electric power to railway vehicles and the AC power network supplies electric power to station electric equipment. Recently, because of power consumption reduction and peak load shaving, intelligent measurement of regenerative energy and renewable energy adapted on DC urban railway is required. For this reason, DC smart metering system for DC power network shall be developed. Therefore, in this paper, DC voltage sensor, current sensor, and DC smart meter were developed and evaluated by performance test. DC voltage sensor was developed for measuring standard voltage range of DC urban railway, and DC current sensor was developed as hall effect split core type in order to install in existing system. DC smart meter possesses function of general intelligent electric power meter, such as measuring electricity and wireless communication etc. And, DC voltage sensor showed average 0.17% of measuring error for 2,000V/50mA, and current sensor showed average 0.21% of measuring error for pm2,000V/pm4V in performance test. Also DC smart meter showed maximum 0.92% of measuring error for output of voltage sensor and current sensor. In similar environment for real DC power network, measuring error rate was under 0.5%. In conclusion, accuracy of DC smart metering system was confirmed by performance test, and more detailed performance will be verified by further real operation DC urban railway line test. |