Research on the Control Strategy of the Battery Energy Storage System in Wind-Solar-Battery Hybrid Generation Station

Abstract

Abstract:In recent years, wind-solar-battery hybrid generation systems (WSBHGS) with large-scale battery energy system (BESS) have been proposed to integrate into power grids. To smooth the output power and improve the schedulability of the WSBHGS, the BESS control strategy is researched and a distributed control architecture of a two-level hierarchy is proposed, which is consisted of the top-level centralized controller and the local controller. The control strategies of the top-level controller including power correction strategy, power distribution strategy and state of charge (SOC) control strategy for battery are proposed to establish the active power reference of each battery energy storage equipment (BESE) of the BESS. The local controller uses the control of grid-connected converter of BESE to trace the power reference signals rapidly. The fluctuations of the output power of the WSBHGS are tested, and the effectiveness of the proposed BESS control strategy is demonstrated under different power generation schedules from the dispatching center.

Renewable Energy Sources and Battery Forecasting Effects in Smart Power System Performance

“…One of the proper ways to simplify complex learning processes is to combine different neural networks [18,[22][23][24]. In the mentioned algorithm, the input data is contributed within the building blocks; in other words, the mature distribution between these blocks.…”

Analysis on Grid-connection Characteristics of Wind/Photovoltaic/Energy Storage Hybrid Station

“…Different coordination control strategies are proposed and used in multiple operating conditions; note that smooth output can be achieved [6][7]. For the application of energy storage, when a W/PV/ES hybrid generation station works in off-grid or grid-connected mode, its key problems in the operation control of the ES device are analyzed [8]. It is noted that the ES capacity in a W/PV/ES hybrid generation station can affect the stability of ES system active power's output, so an optimal model and a control strategy to charge and discharge for ES device are proposed to minimize the fluctuation of active power [9].…”

“…For the application of energy storage, when a W/PV/ES hybrid generation station works in off-grid or grid-connected mode, its key problems in the operation control of the ES device are analyzed [8]. It is noted that the ES capacity in a W/PV/ES hybrid generation station can affect the stability of ES system active power's output, so an optimal model and a control strategy to charge and discharge for ES device are proposed to minimize the fluctuation of active power [9]. In [10], ES device is used to smooth the fluctuating outputs which are generated by the W/PV/ES hybrid generation station.…”