Abstract:In view of the problem that the energy storage device equipped with photovoltaic(PV) in the community has limited capacity and single operation mode, the energy storage device and virtual energy storage generated by linepack reserves and controllable load of air conditioning are combined into an energy storage system. The technology to coordinate the control of the energy storage system under three modes are proposed, including smoothing PV fluctuation, smoothing grid active power fluctuation and peak and valley electricity price arbitrage. In the mode of smoothing PV fluctuation and smoothing grid active power fluctuation, the wavelet packet decomposition is used to obtain the reference instruction of virtual energy storage output power. The instruction of virtual energy storage output power is determined according to the state information of air conditioner, gas pipeline and so on. The energy storage device is selectively used as the backup of virtual energy storage according to the state of S. In peak-valley electricity price arbitrage mode, the energy storage device is used to charge and discharge during idle period combined with time-of-use electricity price information. Three modes are coordinated to realize source-storage-losd energy management. The output power of the energy storage system under different mode combination is obtained by Matlab simulation, which verifies the correctness and effectiveness of the control technology.