scholarly journals Experimental Verification of a Battery Energy Storage System for Integration with Photovoltaic Generators

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Rajkiran Singh ◽  
Seyedfoad Taghizadeh ◽  
Nadia M. L. Tan ◽  
Saad Mekhilef
Keyword(s):  
Energy Storage ◽  
Output Power ◽  
Experimental Verification ◽  
Storage System ◽  
Energy Storage System ◽  
Battery Energy Storage System ◽  
Battery Energy Storage ◽  
Battery Energy ◽  
Photovoltaic Generators ◽  
Pv Generator

This paper presents the experimental verification of a 2 kW battery energy storage system (BESS). The BESS comprises a full-bridge bidirectional isolated dc-dc converter and a PWM converter that is intended for integration with a photovoltaic (PV) generator, resulting in leveling of the intermittent output power from the PV generator at the utility side. A phase-shift controller is also employed to manage the charging and discharging operations of the BESS based on PV output power and battery voltage. Moreover, a current controller that uses the d-q synchronous reference frame is proposed to regulate the dc voltage at the high-voltage side (HVS) to ensure that the voltage ratio of the HVS with low-voltage side (LVS) is equivalent to the transformer turns ratio. The proposed controllers allow fast response to changes in real power requirements and results in unity power factor current injection at the utility side. In addition, the efficient active power injection is achieved as the switching losses are minimized. The peak efficiency of the bidirectional isolated dc-dc converter is measured up to 95.4% during battery charging and 95.1% for battery discharging.

scholarly journals Modelling and region stability analysis of wind turbines with battery energy storage system based on switched system with multi-equilibriums

2019 ◽  
Vol 41 (6) ◽  
pp. 1519-1527 ◽  
Author(s):  
Xiaokun Dai ◽  
Yang Song ◽  
Taicheng Yang
Keyword(s):  
Energy Storage ◽  
Wind Turbine ◽  
Output Power ◽  
Storage System ◽  
Energy Storage System ◽  
Stable Region ◽  
Switched Linear System ◽  
Battery Energy Storage System ◽  
Battery Energy Storage ◽  
Battery Energy

This paper deals with the modelling and control for wind turbine combined with a battery energy storage system (WT/BESS). A proportional-integral (PI) controller of pitch angle is applied to adjust the output power of WT, and a method for battery scheduling is presented for maintaining the state of charging (SOC) of BESS. When the battery level is below the lower limit, we increase the expected output power of wind turbine through raising the operation point to charge the battery. Considering the effect of charging/discharging, a switched linear system model with two equilibriums is presented firstly for such WT/BESS system. The region stability is analyzed and an approach for estimating the corresponding stable region is also given. The effectiveness of the proposed results is demonstrated by a numerical example.

Optimization of Smoothing Control in Hybrid Wind and Battery Energy Storage System

2014 ◽  
Vol 852 ◽  
pp. 703-707 ◽  
Author(s):  
Bai Hua Zhang ◽  
Hai Feng Guo ◽  
Yong Xing Li ◽  
Man Chen ◽  
Yong Qi Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Wind Power ◽  
Output Power ◽  
Wind Farm ◽  
Storage System ◽  
Energy Storage System ◽  
Interior Point Algorithm ◽  
Battery Energy Storage System ◽  
Battery Energy Storage ◽  
Battery Energy

In recent years, renewable energy technologies like wind power generation are developing very fast. However, due to the randomness and intermittency of wind, the integration of large-scale wind farm into grid will have negative impact on many aspects of the grid. An effective way to solve these problems is to install battery energy storage system (BESS) in a wind farm. In order to smooth the output power of wind farm, this paper established a mathematical model for solving optimization problems of hybrid wind and BESS system, solved it with modern interior point algorithm. Charge-discharge process of BESS is optimized using the result of wind power prediction. Sensitivity of constraints in the model is also analyzed and optimal design of output power and capacity of BESS can be obtained as a by-product.

Optimal Sizing of Battery Energy Storage System for Smoothing Power Fluctuations of a PV/Wind Hybrid System

2017 ◽  
Vol 18 (1) ◽  
Author(s):  
Aeidapu Mahesh ◽  
Kanwarjit Singh Sandhu ◽  
Jagilinki Venkata Rao
Keyword(s):  
Energy Storage ◽  
Output Power ◽  
Storage System ◽  
Gravitational Search Algorithm ◽  
Energy Storage System ◽  
Climatic Conditions ◽  
Battery Energy Storage System ◽  
Battery Energy Storage ◽  
Power Fluctuations ◽  
Battery Energy

Abstract This paper presents an approach to size the battery energy storage system (BESS) for the suppression of the output power fluctuations in a solar photovoltaic (PV)/Wind hybrid energy system. The strategy presented uses a dynamic averaging technique, with a different number of samples in order to produce different smoothing levels in the output power. The key advantage of the proposed strategy is that, apart from sizing the BESS, the same strategy can be implemented in real time to perform the energy management for the system. The gravitational search algorithm (GSA) has been used to find the optimum size of the BESS which will be able to produce the required level of smoothing. The effectiveness of the proposed strategy has been verified through a case study presented and the results indicate that the strategy is effectively able to size the BESS for reduced power fluctuations from the system. To verify the robustness of the proposed strategy, the uncertainty in the climatic conditions has also been considered and the results indicate that the proposed strategy works well even in the case of a change in the climatic conditions.

Study of Efficiency of Battery Energy Storage System

2016 ◽  
Vol 136 (11) ◽  
pp. 824-832 ◽  
Author(s):  
Mami Mizutani ◽  
Takenori Kobayashi ◽  
Katsunori Watabe ◽  
Tomoki Wada
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Energy Storage System ◽  
Battery Energy Storage System ◽  
Battery Energy Storage ◽  
Battery Energy
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