Power management of a grid-connected distributed energy resource system

Energy Resource ◽

Energy System ◽

Daily Basis ◽

Energy Sources ◽

Storage Device ◽

Distributed Energy ◽

Distributed Energy System ◽

Modeling Software

This project introduces a modeling software that manages the power flow of a grid-connected distributed energy system on a daily basis. The system uses a control strategy that prioritizes the use of renewable energy sources over storage devices and conventional sources. Wind turbines and PV arrays are the primary sources of energy. Battery bank is used as the permanent storage device and small natural gas generators and the grid are the conventional sources. The software can manage the power flow of electric vehicles as mobile storage units. The power optimization algorithm monitors the power available from each energy source, analyzes and combines their outputs to meet the load demand. Output of the energy sources are analyzed using 15-minute time series simulations. The computer model was developed using MATLAB with a graphical user interface for easy setup, operation and analysis of the results.

Calculation and Analysis of the Interval Power Flow for Distributed Energy System Based on Affine Algorithm

Energies ◽

10.3390/en14030600 ◽

2021 ◽

Vol 14 (3) ◽

pp. 600

Author(s):

Bin Ouyang ◽

Lu Qu ◽

Qiyang Liu ◽

Baoye Tian ◽

Zhichang Yuan ◽

...

Keyword(s):

Power Flow ◽

Load Condition ◽

Energy Systems ◽

Energy System ◽

Optimal Operation ◽

Energy Utilization ◽

Utilization Rate ◽

Distributed Energy ◽

Low Load ◽

Due to the coupling of different energy systems, optimization of different energy complementarities, and the realization of the highest overall energy utilization rate and environmental friendliness of the energy system, distributed energy system has become an important way to build a clean and low-carbon energy system. However, the complex topological structure of the system and too many coupling devices bring more uncertain factors to the system which the calculation of the interval power flow of distributed energy system becomes the key problem to be solved urgently. Affine power flow calculation is considered as an important solution to solve uncertain steady power flow problems. In this paper, the distributed energy system coupled with cold, heat, and electricity is taken as the research object, the influence of different uncertain factors such as photovoltaic and wind power output is comprehensively considered, and affine algorithm is adopted to calculate the system power flow of the distributed energy system under high and low load conditions. The results show that the system has larger operating space, more stable bus voltage and more flexible pipeline flow under low load condition than under high load condition. The calculation results of the interval power flow of distributed energy systems can provide theoretical basis and data support for the stability analysis and optimal operation of distributed energy systems.

Analysis of Three Port Full Bridge and Half Bridge DC-DC Converter Interfacing Renewable Energy System

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.768.3 ◽

2013 ◽

Vol 768 ◽

pp. 3-8 ◽

Cited By ~ 1

Author(s):

M. Venmathi ◽

R. Ramaprabha

Keyword(s):

Renewable Energy ◽

Power Flow ◽

Pulse Width Modulation ◽

Energy System ◽

Energy Sources ◽

Energy Storage Devices ◽

Storage Devices ◽

Conversion Stage ◽

Bidirectional Power Flow

This paper presents the comparative dynamic analysis of full bridge and half bridge three port dc-dc converter topology interfacing the renewable energy sources along with the energy storage devices. The three port converter comprises the active bridge circuit and the three winding transformer. It uses single power conversion stage with high frequency link to control power flow between the batteries, load and the renewable energy sources. The power flow between the ports is controlled by phase shifting the square wave outputs of the active bridges in combination with pulse width modulation (PWM) technique. The analysis reveals that the battery discharges when the source is not sufficient to supply the load and it was charged when the source alone is capable of supplying the load. Hence there is a bidirectional power flow in the storage port when there is a transition in the source.

Improving Simultaneous Cooling and Power Load-Following Capability for MGT-CCP Using Coordinated Predictive Controls

Energies ◽

10.3390/en12061180 ◽

2019 ◽

Vol 12 (6) ◽

pp. 1180 ◽

Cited By ~ 1

Author(s):

Chen Chen ◽

Jiangfan Lin ◽

Lei Pan ◽

Kwang Lee ◽

Li Sun

Keyword(s):

Renewable Energy ◽

Predictive Control ◽

Energy Supply ◽

Energy System ◽

Generalized Predictive Control ◽

Distributed Energy ◽

Load Following ◽

Power Load ◽

The distributed energy system is an energy supply method built around the end users, which can achieve energy sustainability and reduce emissions compared to traditional centralized energy systems. The micro gas turbine (MGT)-based combined cooling and power (CCP) system has received renewed attention as an important distributed energy system technology due to its substantial energy savings and reduced emission levels. The task of the MGT-CCP system is to quickly adapt to changes in various renewable energy sources to maintain the balance in energy supply and demand in a distributed energy system. Therefore, it is imperative to improve the load tracking capability of the MGT-CCP system with advanced control technologies toward achieving this goal. However, the difficulty of controlling the MGT-CCP system is that the MGT responds very fast while CCP responds very slowly. To this end, the dynamic characteristics and nonlinear distribution of the MGT and CCP processes are analyzed, and a coordinated predictive control strategy is proposed by utilizing the generalized predictive control for the MGT system and the Hammerstein generalized predictive control for the CCP system. The coordinated predictive control of generalized predictive control and Hammerstein generalized predictive control was implemented in an 80 kW MGT-CCP simulator to verify the effectiveness of the proposed method. The simulation results show that compared with PID and MPC, the proposed control method not only can greatly improve simultaneous cooling and power load-following capability, but also has the best control effect when accessing with renewable energy.

Optimization and Analysis of Distributed Energy System with Energy Storage Device

Energy Procedia ◽

10.1016/j.egypro.2011.10.126 ◽

2011 ◽

Vol 12 ◽

pp. 958-965 ◽

Cited By ~ 13

Author(s):

Haitao Yun ◽

Weiyi Li

Keyword(s):

Energy Storage ◽

Energy System ◽

Storage Device ◽

Energy Storage Device ◽

Distributed Energy ◽

Study On Hybrid Systems, Grid Integrated Based On Renewable Energy Systems Driving Local Loads

SMART MOVES JOURNAL IJOSCIENCE ◽

10.24113/ijoscience.v5i7.212 ◽

2019 ◽

Vol 5 (7) ◽

pp. 5

Author(s):

Satyam Kumar Prasun ◽

Sanjeev Jararia

Keyword(s):

Renewable Energy ◽

Energy Demand ◽

Energy Resource ◽

Energy System ◽

Energy Sources ◽

Local Loads ◽

World Energy ◽

Electricity Power ◽

Day By Day

The demand for electricity power is increasing day by day, which cannot be met with the satisfied level without non-renewable energy resource. Renewable energy sources such as wind, solar are universal and ecological. These renewable energy sources are best options to fulfill the world energy demand, but unpredictable due to natural conditions. The use of the hybrid solar and wind renewable energy system like will be the best option forthe utilization these available resources. The objective of this paper is to study the various aspects of hybrid solar and wind system. The application and different theories related to the development of hybrid also discussed in this paper.

Small-Scale Renewable Energy Systems in the Development of Distributed Generation in Poland

Moravian Geographical Reports ◽

10.2478/mgr-2014-0010 ◽

2014 ◽

Vol 22 (2) ◽

pp. 34-43 ◽

Cited By ~ 5

Author(s):

Justyna Chodkowska-Miszczuk

Keyword(s):

Renewable Energy ◽

Distributed Generation ◽

Energy Systems ◽

Energy System ◽

Energy Sources ◽

Small Scale ◽

Small Hydropower ◽

Renewable Energy Systems ◽

Abstract Small-scale renewable energy systems in the context of the development of distributed generation, are discussed for the case of Poland. A distributed energy system is efficient, reliable and environmentally friendly, and is one of the most recent trends in the development of the energy sector in Poland. One of the important dimensions of this process is the creation of micro- and small-power producers based on renewable, locally-available energy sources. It is clear that the development of small-scale renewable energy producers takes place in two ways. One of these is through small hydropower plants, which are the aftermath of hydropower development in areas traditionally associated with water use for energy purposes (northern and western Poland). The second is through other renewable energy sources, mainly biogas and solar energy and located primarily in southern Poland, in highly urbanized areas (e.g. Śląskie Voivodship). In conclusion, the development of small-scale renewable energy systems in Poland is regarded as a good option with respect to sustainable development.

Robust Resonant Controllers for Distributed Energy Resources in Microgrids

Applied Sciences ◽

10.3390/app10248905 ◽

2020 ◽

Vol 10 (24) ◽

pp. 8905

Author(s):

Allal El Moubarek Bouzid ◽

Mohamed Zerrougui ◽

Seifeddine Ben Elghali ◽

Karim Beddiar ◽

Mohamed Benbouzid

Keyword(s):

Tracking Error ◽

Energy Resource ◽

Energy System ◽

Linear Matrix ◽

Distributed Energy ◽

Internal Model Principle ◽

Distributed Energy Resource ◽

Distributed Energy System ◽

Augmented State ◽

Micro Grids

Motivated by the problem of different types and variations of load in micro-grids, this paper presents robust proportional-resonant controllers with a harmonics compensator based on the internal model principle. These controllers ensure robust tracking of sinusoidal reference signals in distributed energy resource systems subject to load variation with respect to sinusoidal disturbances. The distributed generation resource and the resonant controllers are described using the augmented state system approach, allowing the application of the state feedback technique. In order to minimize the tracking error and ensure robustness against perturbation, a set of linear matrix inequalities (LMIs) are addressed for the synthesizing of controller gains. Finally, results obtained in the simulation for resonant compensators with the distributed energy system are presented, in which the controller is applied to the CC-CA inverter.

Application of a multiagent approach for optimal load distribution between sources in an integrated energy system taking into account the operation of active consumers

E3S Web of Conferences ◽

10.1051/e3sconf/202128901010 ◽

2021 ◽

Vol 289 ◽

pp. 01010

Author(s):

Valery Stennikov ◽

Evgeny Barakhtenko ◽

Gleb Mayorov

Keyword(s):

Energy Supply ◽

Energy Transition ◽

Energy System ◽

Distribution Networks ◽

Energy Sources ◽

Distributed Energy ◽

Software Environment ◽

Generating Capacity ◽

Integrated Energy System

In the context of the energy transition, research on the creation of integrated energy systems and their control is an actual task. They combine a significant share of renewable energy sources, contribute to the overall efficiency of the system, and enable active consumers to participate in the energy supply process. At the same time, in connection with the growing capacity of distributed energy sources, new problems arise related to the operation of distribution networks and difficulties in adapting the operation of active consumers in the centralized energy system. Active consumers can regulate their energy consumption by distributing the load between centralized and distributed energy sources, and as a result, they can provide flexibility, maneuverability in the operation of the system and increase the efficiency of its redundancy. To organize the work of active consumers in an integrated energy system, a multiagent approach is used. This approach is widely used by researchers to solve various practical tasks. Allows us to represent active consumers in the form of agents with an individual behavior algorithm and organize their interaction with the energy system to ensure optimal energy supply. The proposed mathematical model for finding the optimal composition of generating capacity takes into account the structural organization of centralized and distributed energy sources, as well as the participation of active consumers in the process of energy supply. Modeling of an integrated energy system and carrying out a computational experiment based on multiagent technologies are performed in the AnyLogic software environment.

Polityka klimatyczno-energetyczna Unii Europejskiej

10.31338/1641-2478pe.2.14.6 ◽

2014 ◽

pp. 104-121

Author(s):

Aleksandra Kułaga

Keyword(s):

Negative Impact ◽

Energy System ◽

The Other ◽

Energy Sources ◽

Climate Protection ◽

The European Union ◽

Eu Member States ◽

The Subject ◽

Climate And Energy Policy

The article is devoted to the subject of the goals of the climate and energy policy of the European Union, which can have both a positive, and a negative impact on the environmental and energy policies. Positive aspects are the reduction of greenhouse gas emissions, diversification of energy supplies, which should improve Europe independence from energy imports, and increasing the share of renewable energy sources (RES) in the national energy system structures. On the other hand, overly ambitious targets and actions can lead to large losses for the economies of EU Member States. The article also highlights the realities prevailing in the international arena and noncompliance of international actors with global agreements on climate protection.