scholarly journals Impact of Battery Energy Storage System and its Converter Characteristics on Voltage Sags

2020 ◽  
Author(s):  
Nhlanhla Mbuli ◽  
Sebu Lichaba ◽  
Ronald Xezile ◽  
Jan-Harm Pretorius
Keyword(s):  
Energy Storage ◽  
Power Factor ◽  
Reactive Power ◽  
Critical Voltage ◽  
Voltage Sag ◽  
Voltage Sags ◽  
Constant Voltage ◽  
Constant Power ◽  
Battery Energy Storage ◽  
Battery Energy

Voltage sags can cause the interruption of power supply and can negatively affect operations of customers. In this paper, the authors study the impact of battery energy storage systems (BESS) on voltage sags. A stochastic method of fault positions is used. Faults of various types are simulated and voltages are recorded. Firstly, with the BESS integrated into the network, there are higher residual voltages, fewer voltage sags and less expected critical voltage loss. Secondly, if the BESS converter power factor is reduced, recorded residual voltages are higher, voltage sags are fewer, and the number of expected critical voltage sags is lower. Finally, when three BESS converter control modes, namely constant voltage, constant power factor, and constant reactive power, were assessed, results showed similar voltage sag performances for constant power factor and constant reactive power modes. Furthermore, operating in constant voltage control outperformed the other two modes as it resulted in higher residual voltages, a lower number of voltage sags, and fewer expected critical voltage sags. The paper has demonstrated that the BESS can improve voltage sag performance. In addition, the power factor of the BESS converter and the mode of operation of the converter can influence the magnitude of the voltage sag performance improvement.

Three-Phase Grid Connected Bi-Directional Charging System to Control Active and Reactive Power with Harmonic Compensation

2019 ◽  
Vol 20 (2) ◽  
Author(s):  
Maheswar Prasad Behera ◽  
Pravat Kumar Ray
Keyword(s):  
Energy Storage ◽  
Reactive Power ◽  
Storage System ◽  
Energy Storage System ◽  
Control Technique ◽  
Battery Energy Storage System ◽  
Harmonic Compensation ◽  
Battery Energy Storage ◽  
Three Phase ◽  
Battery Energy

Abstract The feasibility of integration of Battery Energy Storage System (BESS) with a three-phase AC grid is being investigated in this paper. A converter is an inevitable part of a modern DC generating system. The link between the grid and the BESS is established through a Voltage Source Converter (VSC). Therefore, the converter can be utilized to dispatch the DC generated power to the connected AC grid and at the same time provides reactive power compensation and load harmonic compensation throughout the day. The DC bus voltage control of the converter system is carried out to keep the power factor always at unity, irrespective of the charging state of the battery source. The charging and discharging of the connected battery energy storage system are carried out through a bidirectional DC-DC converter. Adaptive hysteresis band current control (AHCC) scheme is employed to produce the switching signals. Finally, its performance is compared with the traditional hysteresis band control technique.

Low Voltage Ride-through for Doubly Fed Induction Generator Using Battery-Storage System

2016 ◽  
Vol 7 (2) ◽  
pp. 481
Author(s):  
D.V.N. Ananth ◽  
G.V. Nagesh Kumar
Keyword(s):  
Energy Storage ◽  
Reactive Power ◽  
Low Voltage ◽  
Storage System ◽  
Energy Storage System ◽  
Control Technique ◽  
Voltage Profile ◽  
Battery Energy Storage System ◽  
Battery Energy Storage ◽  
Battery Energy

In this paper, enhanced field oriented control technique (EFOC) was adopted in Rotor Side Control (RSC) of DFIG converter for improved response during severe faults. The work is intended to damp pulsations in electromagnetic torque, improve voltage mitigation and limit surge currents and to enhance the operation of DFIG during voltage sags. The converter topology uses a battery energy storage system with capacitor storage system to further enhance operation of DFIG during faults. The battery and capacitor system in coordination provide additional real and reactive power support during faults and nearly constant voltage profile at stator and rotor terminals and limit overcurrents. For EFOC technique, rotor flux reference changes its value from synchronous speed to zero during fault for injecting current at the rotor slip frequency. In this process DC-Offset component of flux is controlled, decomposition during overvoltage faults. The offset decomposition of flux will be oscillatory in a conventional FOC, whereas in EFOC it will damp quickly. A comparison is made with proposed methodology with battery energy storage system and a conventional system. Later the system performance with under voltage of 50% the rated voltage with fault at PCC during 0.8 to 1.2 seconds is analysed using simulation studies.

scholarly journals Energy Routing Control Strategy for Integrated Microgrids Including Photovoltaic, Battery-Energy Storage and Electric Vehicles

Energies ◽  
2019 ◽  
Vol 12 (2) ◽  
pp. 302 ◽  
Author(s):  
Yingpei Liu ◽  
Yan Li ◽  
Haiping Liang ◽  
Jia He ◽  
Hanyang Cui
Keyword(s):  
Energy Storage ◽  
Electric Vehicles ◽  
Control Strategy ◽  
Reactive Power ◽  
Constant Current ◽  
Battery Energy Storage ◽  
Energy Internet ◽  
Dc Voltage ◽  
Routing Control ◽  
Battery Energy

The Energy Internet is an inevitable trend of the development of electric power system in the future. With the development of microgrids and distributed generation (DG), the structure and operation mode of power systems are gradually changing. Energy routers are considered as key technology equipment for the development of the Energy Internet. This paper mainly studies the control of the LAN-level energy router, and discusses the structure and components of the energy router. For better control of the power transmission of an energy router, the energy routing control strategy for an integrated microgrid, including photovoltaic (PV) energy, battery-energy storage and electric vehicles (EVs) is studied. The front stage DC/DC converter of the PV system uses maximum power point tracking (MPPT) control. The constant current control is used by the bidirectional DC/DC converter of the battery-energy storage system and the EV system when they discharge. The DC/AC inverters adopt constant reactive power and constant DC voltage control. Constant current constant voltage control is adopted when an EV is charged. The control strategy model is simulated by Simulink, and the simulation results verify the feasibility and effectiveness of the proposed control strategy. The DG could generate reactive power according to the system instructions and ensure the stable output of the DC voltage of the energy router.

Analysis of Reactive Power Control Using Battery Energy Storage Systems for a Real Distribution Feeder

2022 ◽  
Author(s):  
João Paulo Assunção de Souza ◽  
Leonardo Henrique de Melo Leite ◽  
Lucas de Godoi Teixeira ◽  
Wallace do Couto Boaventura ◽  
Danilo Derick Silva Alves ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Control ◽  
Reactive Power ◽  
Storage Systems ◽  
Energy Storage Systems ◽  
Reactive Power Control ◽  
Battery Energy Storage ◽  
Real Distribution ◽  
Battery Energy Storage Systems ◽  
Battery Energy
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