Coordinated Control System between Grid–VSC and a DC Microgrid with Hybrid Energy Storage System

Direct current microgrids (DCMGs) are currently presented as an alternative solution for small systems that feed sensitive electrical loads into DC. According to the scientific literature, DCMG maintains good voltage regulation. However, when the system is in islanded mode, very pronounced voltage variations are presented, compromising the system’s ability to achieve reliable and stable energy management. Therefore, the authors propose a solution, connecting the electrical network through a grid-tied voltage source converter (GVSC) in order to reduce voltage variations. A coordinated control strategy between the DCMG and GVSC is proposed to regulate the DC voltage and find a stable power flow between the various active elements, which feed the load. The results show that the control strategy between the GVSC and DCMG, when tested under different disturbances, improves the performance of the system, making it more reliable and stable. Furthermore, the GVSC supports the AC voltage at the point of common coupling (PCC) without reducing the operating capacity of the DCMG and without exceeding even its most restrictive limit. All simulations were carried out in MATLAB 2020.

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Adaptive SRF-PLL Based Voltage and Frequency Control of Hybrid Standalone WECS with PMSG-BESS

International Journal of Emerging Electric Power Systems ◽

10.1515/ijeeps-2018-0072 ◽

2018 ◽

Vol 19 (6) ◽

Cited By ~ 1

Author(s):

Anjana Jain ◽

R. Saravanakumar ◽

S. Shankar ◽

V. Vanitha

Keyword(s):

Reactive Power ◽

Frequency Control ◽

Storage System ◽

Synchronous Generator ◽

Energy Storage System ◽

Voltage Regulation ◽

Operating Conditions ◽

Voltage Source ◽

Voltage Source Converter ◽

Control Scheme

Abstract The variable-speed Permanent Magnet Synchronous Generator (PMSG) based Wind Energy Conversion System (WECS) attracts the maximum power from wind, but voltage-regulation and frequency-control of the system in standalone operation is a challenging task A modern-control-based-tracking of power from wind for its best utilization is proposed in this paper for standalone PMSG based hybrid-WECS comprising Battery Energy Storage System (BESS). An Adaptive Synchronous Reference Frame Phase-Locked-Loop (SRF-PLL) based control scheme for load side bi-directional voltage source converter (VSC) is presented for the system. MATLAB/Simulink model is developed for simulation study for the proposed system and the effectiveness of the controller for bi-directional-converter is discussed under different operating conditions: like variable wind-velocity, sudden load variation, and load unbalancing. Converter control scheme enhances the power smoothening, supply-load power-matching. Also it is able to regulate the active & reactive power from PMSG-BESS hybrid system with control of fluctuations in voltage & frequency with respect to varying operating conditions. Proposed controller successfully offers reactive-power-compensation, harmonics-reduction, and power-balancing. The proposed scheme is based on proportional & integral (PI) controller. Also system is experimentally validated in the laboratory-environment and results are presented here.

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PHC, Id-Iq and p-q Control Strategies for Mitigation of Current Harmonics in Three-Phase Three-Wire Shunt Active Filter with PI Controller

International Journal of Emerging Electric Power Systems ◽

10.1515/ijeeps-2016-0055 ◽

2017 ◽

Vol 18 (2) ◽

Cited By ~ 1

Author(s):

Suresh Mikkili ◽

Adinarayana Padamati

Keyword(s):

Control Strategy ◽

Control Strategies ◽

Voltage Regulation ◽

Active Filter ◽

Electrical Network ◽

Voltage Source ◽

Complex Nature ◽

Voltage Source Converter ◽

Shunt Active Filter ◽

Three Phase

Abstract In this research paper, the shunt active filter (SHAF) is used to improve the power quality of electrical network by mitigating the harmonics with the help of different control strategies (p-q control strategy, Id-Iq control strategy, PHC control strategy) for three phase three wire system. It is quite difficult to optimize the performance of power system networks using conventional methods, because of complex nature of the systems that are highly non-linear and non-stationary. Three phase reference current waveforms generated by the proposed schemes are tracked by three phase voltage source converter in a hysteresis band control scheme. The performance of proposed control strategies has been evaluated in terms of harmonic mitigation and DC link voltage regulation under various source voltage conditions. The proposed SHAF with different control strategies is able to eliminate uncertainty in the system and SHAF gains outstanding compensation abilities. The detailed simulation results using MATLAB/Simulink software are presented to support the feasibility of the proposed control strategy.

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A Novel Coordinated Control Strategy for Energy Storage System in DC Microgrid With Weak Communication

IEEE Transactions on Industry Applications ◽

10.1109/tia.2019.2948587 ◽

2020 ◽

Vol 56 (1) ◽

pp. 800-814 ◽

Cited By ~ 2

Author(s):

Bingqing Shi ◽

Yongyan Zhou ◽

Wei Zhao ◽

Yilin Zhou ◽

Zhengming Zhao ◽

...

Keyword(s):

Energy Storage ◽

Control Strategy ◽

Storage System ◽

Coordinated Control ◽

Energy Storage System ◽

Dc Microgrid

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

Energies ◽

10.3390/en14041121 ◽

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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