Research On Energy Management Technology Of Micro-grid

ABSTRACT:Under the pressure of energy and environmental protection and economic development, micro-grid gets more and more attention and application. The study on micro-grid energy management technologies can help improve the micro-economic power system operation and reliability, improve the efficiency of the system, and reduce carbon dioxide emissions, and provide customized service in the power-starved. In this paper, micro-grid system power management technology as the study of communication problems between the micro-powers, current-loop control, micro-power power control and other issues in-depth study of the system.This paper describes a power control strategy and drooping characteristic control strategy of single inverter. For the PQ control, this paper perform active and reactive power calculation and decoupling, PI current control with current tracking technology in order to achieve active and reactive power control. While the drooping characteristics of control have also been active and reactive power calculation and decoupling, achieving power, frequency, and voltage control through the design of drooping curve.This paper describes the micro-grid control strategies, mainly by the master-slave control and equal control, the model in this paper is established based on equal control, the use of two inverters in parallel as a micro-power supply. This micro-grid energy management algorithm designed, according to the different load power required for rational micro-switching power supply work.In the above, software Matlab/Simulink model simulation was carried out. A single inverter control simulation was the foundation of the following micro-grid control. In the model, the design of micro-grid simulation of energy management algorithms to simulate different load condition, the micro-grid energy management process, experimental waveform is stable and reliable, proved that the established simulation model and the design of the micro-grid energy management algorithm.Communication between the micro-grid systems is the important part of energy management. Because of the CAN protocol for the producers the principle of users and multi-host data transfer capacity, the CAN protocol is particularly suitable for distributed systems. This paper developed CAN protocol, determine the frame format sent by the mailbox, configure the registers, and program the communication between micro-grids. Through the experiments of communication about the DSP, information transmission is successful and accurate.