ANALYSIS OF A EOLIC-PHOTOVOLTAIC HYBRID GENERATION WITH SYNCHRONVERTER FOR FREQUENCY AND VOLTAGE SUPPORTS IN A MICROGRID

2020 ◽  
Author(s):  
Maxwel d A Silva Santos ◽  
Luciano Sales Barrosy ◽  
Rafael Lucas Da Silva França ◽  
Flavio Bezerra Costa ◽  
Camila Mara Vital Barrosy ◽  
...  
Keyword(s):  
Storage System ◽  
Hydroelectric Power Plant ◽  
Synchronous Generator ◽  
Energy Storage System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Hydroelectric Power ◽  
Hybrid Generation ◽  
Photovoltaic Array ◽  
Battery Energy

A microgrid consists of a grid capable of operating in connection to the main interconnected power system or in island mode. This paper deals with a microgrid containing a small hydroelectric power plant (HPP), a battery energy storage system (BESS), a wind energy conversion system (WECS), and a photovoltaic array (PV). The WECS and PV systems are connected to the grid through one full-power voltage source converter (VSC). In order to provide frequency and voltage supports to the microgrid, the VSC is controlled by a virtual synchronous generator (VSG) technique of synchronverter. The considered scenario was divided into three parts: first, the microgrid operates connected to the main system and then it starts operating in island mode; posteriorly, frequency and voltage variations occur due to load variations in the microgrid; finally, the microgrid returns to operate connected to the interconected system. Simulation results have shown that the synchronverter is an alternative to provide efficient frequency and voltage control to a microgrid for both connected and island modes, considering a hybrid generation unit.

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

2018 ◽  
Vol 19 (6) ◽  
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.

scholarly journals V-f Controlled Autonomous Wind Energy Conversion System Using Z2 Transformer Connected DSTATCOM

2019 ◽  
Vol 8 (6) ◽  
pp. 1492-1497
Keyword(s):  
Distribution System ◽  
Pulse Width Modulation ◽  
Renewable Energy Sources ◽  
Storage System ◽  
Energy Storage System ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Control Scheme ◽  
Voltage Frequency ◽  
Battery Energy

Distributed generation and renewable energy sources are hot research topics from past 10 years or so due to various reasons. The sudden load variation leads to change in voltage and frequency, and if nonlinearity presents, the T.H.D. variations will be more. Power quality controlled devices like DSTATCOM with battery energy storage system (B.E.S.S.) that controlled by pulse width modulation (P.W.M.) based voltage source converter (V.S.C.) in the distribution system would control the voltage, frequency and THD, indirectly power control. This paper presents an autonomous W.E.C.S. with zig-zag (Z2) transformer connected V.S.C. controlled DSTATCOM with BESS and its control scheme. It also shows the various MATLAB simulated results. It also contemplates the various performance parameters from previous methodology. It strategically concludes that the proposed system is effective in controlling voltage and frequency (V-f) and T.H.D. in voltage and current

scholarly journals Design of Res Based Pv-Wind Generation System for Microgrid System

2019 ◽  
Vol 9 (2) ◽  
pp. 4567-4571
Keyword(s):  
Storage System ◽  
Energy Storage System ◽  
Voltage Source ◽  
Small Scale ◽  
Voltage Source Converter ◽  
Diesel Generator ◽  
Power Sources ◽  
Renewable Power ◽  
Battery Energy ◽  
Wind Generation System

Power expansions of network to disconnected areas are related with specialized and affordable issues. To examine the power Renewable Power Sources (RES) are used. In this paper, the design of RES based PV based wind generator is proposed. Here voltage source converter is used in the autonomous small scale applications. The both battery energy storage system and the diesel generator will produce the operation as fast as possible compared to other blocks. The main advantage of this system is control the system without any interpretations. AC source is obtained because of the proposed Distributed Generation set acts as an AC source. By utilizing fluffy rationale controller in this framework, to decrease the deviations in the waveforms. A wide assortment of matlab/simulink reproduction results is introduced to exhibit every one of the highlights of the proposed framework.

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

Electronics ◽  
2021 ◽  
Vol 10 (21) ◽  
pp. 2699
Author(s):  
Miguel Montilla-DJesus ◽  
Édinson Franco-Mejía ◽  
Edwin Rivas Trujillo ◽  
José Luis Rodriguez-Amenedo ◽  
Santiago Arnaltes
Keyword(s):  
Control Strategy ◽  
Power Flow ◽  
Storage System ◽  
Coordinated Control ◽  
Energy Storage System ◽  
Voltage Regulation ◽  
Electrical Network ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Dc Microgrid

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.

scholarly journals Design and Line Fault Protection Scheme of a DC Microgrid Based on Battery Energy Storage System

Energies ◽  
2018 ◽  
Vol 11 (7) ◽  
pp. 1823 ◽  
Author(s):  
Abdul Howlader ◽  
Hidehito Matayoshi ◽  
Saeed Sepasi ◽  
Tomonobu Senjyu
Keyword(s):  
Energy Storage ◽  
Storage System ◽  
Energy Storage System ◽  
Voltage Source ◽  
Battery Energy Storage System ◽  
Dc Microgrid ◽  
Battery Energy Storage ◽  
Protection Scheme ◽  
Fault Protection ◽  
Battery Energy

Currently, the Direct-Current (DC) microgrid has been gaining popularity because most electronics devices require a DC power input. A DC microgrid can significantly reduce the AC to DC energy conversion loss. However, a power grid may experience a line fault situation that may damage important household devices and cause a blackout in the power system. This work proposes a new line fault protection scheme for a DC microgrid system by using a battery energy storage system (BESS). Nowadays, the BESS is one of the most cost effective energy storage technologies for power system applications. The proposed system is designed from a distributed wind farm smart grid. A total of three off-shore wind farms provide power to the grid through a high voltage DC (HVDC) transmission line. The DC microgrid was modeled by a BESS with a bi-directional DC–DC converter, various DC-loads with step down DC–DC converters, a voltage source converter, and a voltage source inverter. Details of the control strategies of the DC microgrid are described. During the line fault situation, a transient voltage was controlled by a BESS. From the simulation analyses, it is confirmed that the proposed method can supply stable power to the DC grid, which can also ensure protection of several loads of the DC microgrid. The effectiveness of the proposed system is verified by in a MATLAB/SIMULINK® environment.

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