scholarly journals Flexible Active Power Control for PV-ESS Systems: A Review

Energies ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 7388
Author(s):  
Xiangqiang Wu ◽  
Tamas Kerekes
Keyword(s):  
Energy Storage ◽  
Solar Energy ◽  
Power Control ◽  
Smart Grids ◽  
Low Voltage ◽  
Storage Systems ◽  
Distribution Networks ◽  
Active Power ◽  
Energy Storage Systems ◽  
Active Power Control

The penetration of solar energy in the modern power system is still increasing with a fast growth rate after long development due to reduced environmental impact and ever-decreasing photovoltaic panel cost. Meanwhile, distribution networks have to deal with a huge amount and frequent fluctuations of power due to the intermittent nature of solar energy, which influences the grid stability and could cause a voltage rise in the low-voltage grid. In order to reduce these fluctuations and ensure a stable and reliable power supply, energy storage systems are introduced, as they can absorb or release energy on demand, which provides more control flexibility for PV systems. At present, storage technologies are still under development and integrated in renewable applications, especially in smart grids, where lowering the cost and enhancing the reliability are the main tasks. This study reviews and discusses several active power control strategies for hybrid PV and energy storage systems that deliver ancillary services for grid support. The technological advancements and developments of energy storage systems in grid-tied PV applications are also reviewed.

scholarly journals Optimal Scheduling for Energy Storage Systems in Distribution Networks

Energies ◽  
2020 ◽  
Vol 13 (15) ◽  
pp. 3921
Author(s):  
Miquel Escoto ◽  
Mario Montagud ◽  
Noemi González ◽  
Alejandro Belinchón ◽  
Adriana Valentina Trujillo ◽  
...  
Keyword(s):  
Energy Storage ◽  
Power Systems ◽  
Smart Grids ◽  
Storage Systems ◽  
Distributed Storage ◽  
Distribution Networks ◽  
Low Carbon ◽  
Energy Storage Systems ◽  
Specific Distribution ◽  
Optimization Methodology

Distributed energy storage may play a key role in the operation of future low-carbon power systems as they can help to facilitate the provision of the required flexibility to cope with the intermittency and volatility featured by renewable generation. Within this context, this paper addresses an optimization methodology that will allow managing distributed storage systems of different technology and characteristics in a specific distribution network, taking into account not only the technical aspects of the network and the storage systems but also the uncertainties linked to demand and renewable energy variability. The implementation of the proposed methodology will allow facilitating the integration of energy storage systems within future smart grids. This paper’s results demonstrate numerically the good performance of the developed methodology.

scholarly journals Universal Active Power Control Converter for DC-microgrids with Common Energy Storage

2021 ◽  
pp. 1-1
Author(s):  
Umamaheswararao Vuyyuru ◽  
Suman Maiti ◽  
Chandan Chakraborty ◽  
Efstratios I Batzelis
Keyword(s):  
Energy Storage ◽  
Power Control ◽  
Active Power ◽  
Active Power Control ◽  
Dc Microgrids

scholarly journals Using Energy Storage Inverters of Prosumer Installations for Voltage Control in Low-Voltage Distribution Networks

Energies ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 1121
Author(s):  
Rozmysław Mieński ◽  
Przemysław Urbanek ◽  
Irena Wasiak
Keyword(s):  
Energy Storage ◽  
Control Strategy ◽  
Reactive Power ◽  
Low Voltage ◽  
Storage System ◽  
Distribution Networks ◽  
Energy Storage System ◽  
Voltage Regulation ◽  
Active Power ◽  
Total Power

The paper includes the analysis of the operation of low-voltage prosumer installation consisting of receivers and electricity sources and equipped with a 3-phase energy storage system. The aim of the storage application is the management of active power within the installation to decrease the total power exchanged with the supplying network and thus reduce energy costs borne by the prosumer. A solution for the effective implementation of the storage system is presented. Apart from the active power management performed according to the prosumer’s needs, the storage inverter provides the ancillary service of voltage regulation in the network according to the requirements of the network operator. A control strategy involving algorithms for voltage regulation without prejudice to the prosumer’s interest is described in the paper. Reactive power is used first as a control signal and if the required voltage effect cannot be reached, then the active power in the controlled phase is additionally changed and the Energy Storage System (ESS) loading is redistributed in phases in such a way that the total active power set by the prosumer program remains unchanged. The efficiency of the control strategy was tested by means of a simulation model in the PSCAD/EMTDC program. The results of the simulations are presented.

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