Power Line Communication Technology Study For Energy Internet

Energy Internet takes the power system control network as the core, and combines with a large number of distributed renewable energy sources, and it uses information communication technology to realize the two-way flow of energy and information. Power line communication mainly including PLC and TWACS. They all do not need to set up special line, and have no public communication service cost. Under the Energy Internet architecture, the distributed energy access, micro power grid optimization operation, the active load monitoring and other fields have broad application space.In this background, this paper studies the Energy Internet overall architecture, analyzes the distributed power under normal operation and island operation mode to the needs of information transmission; on this basis, according to the characteristics of the power line carrier and power frequency communication, analyze these two kinds of power line communication technology in the Energy Internet possible scenarios.Aimed at the problem of distributed power island detection, design on distributed power supply, which is based on power line communication power frequency island detection scheme. The downlink power frequency communication signal generator is installed on the main bus bar. Receiving circuit, located in the distributed power, finished the power frequency signal detection. By judging the existence of downward modulation signal and to implement the island detection. Because of the downward power frequency receiving circuit of communication platform and electric energy metering almost unanimously, so we can improve the reliability of the distributed power island detection.According to the characteristics of the Energy Internet environment, study the noise characteristics of the carrier channel in power line carrier communication technology. And based on the parameter matching and transmission line theory, build the broadband power line carrier channel model. Study the different carrier frequency in complex circuit attenuation situation of environment; on this basis, design improvement scheme the performance of the power line carrier-current communication.For the Energy Internet application requirements, design the photovoltaic power station monitoring scheme, which is based on power line carrier communication, and design distributed wind-water power monitoring solution, which is based on power line carrier and power frequency communication.