Modelling and simulation for energy management of a hybrid microgrid with droop controller (original) (raw)

Energy management of PV wind based microgrid with hybrid energy storage systems

International Journal of Power Electronics and Drive Systems, 2022

Power demand all around the world is increasing day by day and conventional energy sources are getting depleted. In order to meet the power demand and to reduce the carbon emission caused by the conventional energy sources, alternate renewable energy sources are important. wind and solar are two reliable energy sources among the various renewable energy sources. In this proposed paper wind and photovoltaic (PV) energy-based direct current (DC) microgrid is proposed with super capacitor and battery hybrid energy storage systems. Constant DC link voltage is the replication of energy balance in DC microgrid. The main goal of the proposed microgrid energy management algorithm is to maintain the constant DC link voltage irrespective of the intermittent nature of the renewable energy sources, load variations and under fault conditions. Energy management system is designed such that battery energy storage system handles the average power requirements and super capacitor handles the transient power requirements caused by the load, renewable energy variation and also caused due to fault conditions. The proposed system improves battery life along with effective DC link voltage regulation. The proposed control algorithm of energy management is compared with conventional energy management system in MATLAB/Simulink and presented for various studies.

A novel approach for modelling of small renewable energy hybrid micro grid with storage

2018

The objective of the paper is to design and implement a hybrid micro grid comprises of solar photovoltaic (SPV), wind energy conversion system (WECS) and battery storage. The model is designed for stand-alone as well as integrated operation with an existing grid. MATLAB /Simulink is used as the modelling environment. The proposed model consists of PV cell array, wind turbine model, battery for storage, buck boost converter topology and an inverter. The advancement in the renewable source of energy from last decade have taken a good pace, that’s due to the increase in power supply demand and continued rise in prices of conventional sources of energies. Moreover, in recent year’s generation of electricity using the different types of renewable sources are specifically evaluated in the economic performance of the overall equipment. This Paper illustrates wind and solar hybrid system for supplying electricity to the power grid.

Modelling and control of grid connected microgrid with hybrid energy storage system

International Journal of Power Electronics and Drive Systems, 2023

This paper presents a photovoltaic (PV) microgrid with battery and super capacitor hybrid energy storage systems. The proposed microgrid system is designed for both grid connected and standalone mode with coordinated control-based energy management system, which controls DC link voltage, voltage and frequency balance at point of common coupling. DC link voltage control is implemented using dual loop PI controller-based voltage controller and inverter control is based on D-Q reference frame technique. The microgrid system is demonstrated in MATLAB/Simulink. The presentation of the planned energy supervision system is analyzed for varying generation and load condition. In the proposed microgrid the battery energy storage system is utilized to provide long term energy during average power requirement and supercapacitor energy storage system is utilized to provide short term power requirements during sudden load variation, generation variation and during transition of modes. Designed energy management system performs effectively in grid connected mode, standalone mode with smooth transition between the modes. And it maintains dc bus voltage of the microgrid constant irrespective of load and generation variations and also during mode changing conditions.

INTEGRATION OF WIND AND SOLAR POWER TO A DC MICROGRI

Operational controls within the microgrid are designed to maintain the integration of the wind and solar power. The dc microgrid is propounded to comprise a wind energy conversion system (WECS), a photovoltaic array (PV), battery energy storage system (BESS) and supercapacitor (SCAP). Droop control for power electronic converters connected to battery storage which is a function of the storage state-of-charge (SOC) and can become asymmetric is developed and tested. Supercapacitor and battery are modeled with an energy management strategy in a hybrid storage system. SCAPs are featured for peak power demand, and batteries supply the power in the steady state. Untapped wind and solar are supporting to deliver to electric vehicles (EV) and the main AC grid.

Performance Analysis of a Hybrid Microgrid with Energy Management

Engineering, Technology & Applied Science Research

In a hybrid microgrid system, various renewable energy resources may be integrated and modeled on-site, in such a way as to provide an optimal, consistent, and sustainable energy production at a cost-effective rate throughout the year. In this paper, a microgrid prototype consisting of a wind turbine and a photovoltaic (PV) panel is modeled and thoroughly investigated through various changes in inputs. The long-term goal of this work in IUM is to develop a concise and complete microgrid system model that can be used to simulate and fully understand its behavior and operation. The proposed model including power sources, power electronic converters, and load has been modeled in MATLAB/Simulink.

Review on Integration of Wind and Solar DC Microgrid Using Matlab

Operational controls are designed to support the integration of wind and solar power within microgrids. An aggregated model of renewable wind and solar power generation forecast is proposed to support the quantification of the operational reserve for day-ahead and real-time scheduling. Then, a droop control for power electronic converters connected to battery storage is developed and tested. Compared with the existing droop controls, it is distinguished in that the droop curves are set as a function of the storage state-of-charge (SOC) and can become asymmetric. The adaptation of the slopes ensures that the power output supports the terminal voltage while at the same keeping the SOC within a target range of desired operational reserve. This is shown to maintain the equilibrium of the microgrid's real-time supply and demand. The controls are implemented for the special case of a dc microgrid that is vertically integrated within a high-rise host building of an urban area. Previously untapped wind and solar power are harvested on the roof and sides of a tower, thereby supporting delivery to electric vehicles on the ground. The microgrid vertically integrates with the host building without creating a large footprint.

Design of a Hybrid Energy System with Energy Storage for Standalone DC Microgrid Application

Energies

This paper presents microgrid-distributed energy resources (DERs) for a rural standalone system. It is made up of a solar photovoltaic (solar PV) system, battery energy storage system (BESS), and a wind turbine coupled to a permanent magnet synchronous generator (WT-PMSG). The DERs are controlled by maximum power point tracking (MPPT)-based proportional integral (PI) controllers for both maximum power tracking and error feedback compensation. The MPPT uses the perturb and observe (P&O) algorithm for tracking the maximum power point of the DERs. The PI gains are tuned using the Ziegler–Nichols method. The developed system was built and simulated in MATLAB/Simulink under two conditions—constant load, and step-load changes. The controllers enabled the BESS to charge even during conditions of varying load and other environmental factors such as change of irradiance and wind speed. The reference was tracked extremely well by the output voltage of the DC microgrid. This is useful research...

SIMULATION ANALYSIS OF POWER CONTROL USING DROOP CONTROL METHOD IN AC-DC MICROGRID

Due to the fast proliferation of distributed generators (DGs) in power systems, managing the power of different DGs and the grid has become crucial, and microgrid provides a promising solution. Therefore, focus on ac and dc microgrids has grown rapidly with their architectural, modeling, stability analysis and enhancement, power quality improvement, power sharing control, and other issues. Most developments mentioned above on micro grids are, however, directed at DG control mainly within one microgrid.

Applying Improved Droop Control to Hybrid Microgrid Control

Hybrid microgrid consists of AC and DC grids, in which the interlinking converter is used to connect AC and DC microgrids. The droop control scheme is widely applied to hybrid microgrid control including interlinking converter because it can be used to control power in hybrid microgrid without communication. However, the existing steady-state error in conventional droop control might affect to the power quality of sensitive load. Therefore, the improved droop control scheme is proposed in this study, in which the steady-stated error is removed by using an additional PI regulator. Various simulation scenarios in term of load variations are performed in the MATLAB/Simulink environment to verify the control performance of proposed control scheme. Simulation results show that the frequency and DC voltage are controlled stably by using improved droop control scheme.

Operation, Control and Simulation of Hybrid Ac/DC Microgrid

2021

1Assistant Professor (EE), GEC JDP, Chhattisgarh, India 2-5BE 8TH SEM (EE) , GEC JDP, Chhattisgarh, India ---------------------------------------------------------------------***--------------------------------------------------------------------AbstractRenewable energy resources are increasingly being regarded as a viable alternative in microgrid supply side design (MG). This study focuses on the optimum design, control, operation, and simulation of hybrid renewable energy-based MGs with the goal of lowering lifecycle costs while taking environmental emissions into account. The MG approach reduces numerous reverse conversion in a private AC or DC grid by connecting all facilities in variable AC and DC sources, as well as the load to power system. The use of power converters to link DGs to the electric grid has raised concerns about equipment safety and protection. To the client, the MG are frequently built to satisfy their specific needs, such as increased local reliability, reduce...