Power Line Communication-based Online Monitoring of DC Battery Packs
Because communication transmission is difficult to adapt to the differentiation of DC system battery data,there is a large error in its monitoring effect.Therefore the power line communication-based online monitoring of DC system battery packs was studied.Specific DC system battery state data were obtained by focusing on the status data of self-dis-charge rate,discharge rate,and discharge ratio.OFDM was used to carry out adaptive processing of power line communi-cation channels,and the original frequency selective broadband channel of power carrier communication was segmented in-to multiple flat narrow band channels.According to the transmission requirements of DC battery status monitoring data,the corresponding transmission power and information bits were allocated.In the test results,the proposed method not only had a relatively stable relative error of the test battery discharge rate monitoring results,but also had a relatively low error level,which maintained stable within 2.0%with a maximum of only 1.89%and a minimum of only 1.26%.
power line communicationDC systembattery packonline monitoringstatus data acquisitionOFDMbroadband channeltransmission powerinformation bit