28 research outputs found
Load frequency controllers considering renewable energy integration in power system
Abstract: Load frequency control or automatic generation control is one of the main operations that take place daily in a modern power system. The objectives of load frequency control are to maintain power balance between interconnected areas and to control the power flow in the tie-lines. Electric power cannot be stored in large quantity that is why its production must be equal to the consumption in each time. This equation constitutes the key for a good management of any power system and introduces the need of more controllers when taking into account the integration of renewable energy sources into the traditional power system. There are many controllers presented in the literature and this work reviews the traditional load frequency controllers and those, which combined the traditional controller and artificial intelligence algorithms for controlling the load frequency
Active power management of islanded interconnected distributed generation
Abstract: The present paper proposes a management of active power in distributed generation considering an islanded mode. Power system is a complex system from the point of view of its constitution, operation and management. Because of energy sources scarcity and energy increasing demand in most of the electrical power systems worldwide, renewable energy exploitation continue to attract researches and exploitation of this weather depending resources. When considering the island mode or without connection to the main grid, of the distributed generation its operation and control became more difficult or uncertain based their dependencies on the weather. Using optimal theory, this paper solve the management of interconnected microgrids operating in islanded mode. Matlab software is used to solve all optimisation problems
Load Frequency Controller Considering Interconnection with a Hybrid Distributed Generation
Abstract: This paper proposed an optimal model of frequency control based on predictive strategy approach. The proposed model was validated using three microgrids interconnected together via tie-lines. Two conventional power plants, hydro and thermal was interconnected with a hybrid generation system made by a photovoltaic and a wind farm. It is well known that the predictive controller and the storage system control parameters are found by expertise of the designer or using the trial and error approach. To solve this issue, the grey Wolf Optimiser (GWO) algorithm is used to tune the proposed controller and the storage system parameters to keep the power flow between the interconnected areas as scheduled when considering load variations. The proposed predictive controller was built in Matlab/Simulink and the effectiveness of the model was shown with the obtained simulation results
Energy flow estimation-control of two interconnected microgrids
Being dependent on weather, photovoltaic and wind system energy contributions fluctuate and are not continuously available, and sometimes not in the desired quantity. To avoid load shedding or blackout in this situation, the estimation-control of energy can be useful to ensure continuity of supply and assist the planning operation of the power system. This paper proposes the estimation-control of the flow of energy between two microgrids interconnected via two alternating current tie-lines. Two sources of power generation depending on weather behaviours have been considered. The effectiveness of the proposed estimation-control model was shown using the Extended Kalman filter combined with the fmincon algorithm
Energy flow estimation-control of two interconnected microgrids
Being dependent on weather, photovoltaic and wind system energy contributions fluctuate and are not continuously available, and sometimes not in the desired quantity. To avoid load shedding or blackout in this situation, the estimation-control of energy can be useful to ensure continuity of supply and assist the planning operation of the power system. This paper proposes the estimation-control of the flow of energy between two microgrids interconnected via two alternating current tie-lines. Two sources of power generation depending on weather behaviours have been considered. The effectiveness of the proposed estimation-control model was shown using the Extended Kalman filter combined with the fmincon algorithm
Critical analysis of the electricity market in developing country municipality
DATA AVAILABILITY : Data will be made available on request.Proceedings of the 7th International Conference on Advances on Clean Energy Research, ICACER 2022, April 20–22, 2022, Barcelona, Spain.Developing countries are experiencing significant urban and population growth. This amplifies the crisis of governance of essential public services. This study analyses the electricity market in Lubumbashi, one of the Democratic Republic of Congo (DRC) municipalities. Surveys at different scales are conducted, assessing both access to electricity and the role of actors. 5270 households, 41 policymakers and 100 employees at different scales are interviewed. It has been found that the electricity market is deteriorated by illegal connections to the electricity grid, uncontrolled urban growth, corruption, and poverty. Besides, the quality and cost of electricity decrease with distance from the city centre. Therefore, privatization of the electricity sector would lead to low-cost electricity and high-quality service.http://www.elsevier.com/locate/egyrhj2023Electrical, Electronic and Computer Engineerin
Assessing and mapping electricity access patterns in a developing country
7th International Conference on Renewable Energy and Conservation, ICREC 2022 November
18–20, 2022, Paris, FranceDATA AVAILABILITY : Data will be made available on request.Despite low electricity access rates and weakened electricity sector governance under the pressure of population growth,
modes of access to electricity in Lubumbashi vary spatially and in their typologies. However, to date, there is no detailed
information on mapping households’ modes of access to the National Electricity Company (SNEL) electricity network. This
study aims to assess and map both formal and informal methods of household access to electricity in Lubumbashi. A sociotechnical
survey was conducted among 1211 households in the 7 communes or districts of the city. The results showed that
the electricity access rate in the different districts of Lubumbashi varies between 41.6 and 78.3%, with an urban average of
63.8 %. The lowest rate is observed in the Annex district, while the highest is kept in the Kamalondo commune. At both
the rural and urban levels, the most dominant method of access to electricity is a connection to the grid (formal and legal
methods), with the highest rate in the Kamalondo, Kenya and Lubumbashi districts. Clandestine electrical connections are most
common in the communities of Kamalondo and Kenya. The Annexe and Lubumbashi districts have the lowest rates of illegal
electric connections. This study showed that the spatial distribution of cases of electricity theft and non-payment of bills in
Lubumbashi is influenced by complex factors, such as the interaction between urban growth, household income level and the
governance mode. The fight against fraudulent connections should be based on the present study to propose localized and
adequate solutions in the different districts.http://www.elsevier.com/locate/egyram2024Electrical, Electronic and Computer EngineeringSDG-07:Affordable and clean energ
Load frequency controllers considering renewable energy integration in power system
Abstract : Please refer to full text to view abstract
Optimal control of active power sharing capacity of microgrids interconnected
Abstract : Microgrid is the whole of loads and distributed generation units located at varying distances but close to each other. Power sharing control amongst distributed generation units is the main issues in the microgrids. Two techniques exists to conduct power sharing, in form of load current or active or reactive power sharing. Most of the researchers usually assume a single load in their microgrid system. The model proposed in this paper consider two microgrid interconnected, with multi loads. An optimisation of active power sharing model has been proposed. The effectiveness of the proposed method is evaluated using MatLab environment