Smart Energy and Cost Optimization for Hybrid Micro-Grids

2017 ◽  
pp. 284-310
Author(s):  
Imene Yahyaoui ◽  
Rachid Ghraizi ◽  
Fernando Tadeo ◽  
Marcelo Eduardo Vieira Segatto
Keyword(s):  
Control Strategy ◽  
Power Flow ◽  
Cost Optimization ◽  
Operating Cost ◽  
Target Area ◽  
Diesel Generator ◽  
Power Sources ◽  
Battery Bank ◽  
Micro Grids ◽  
Safe Operating

This chapter is concerned with the energy management of a hybrid micro-grid composed of photovoltaic/ wind/ battery bank and diesel generator, which is used to supply domestic loads. Hence, a control strategy is proposed to manage the power flow between the power sources and the loads, which ensures the maximization of the renewable sources use, and therefore the minimization of the battery bank and diesel generator use. The control strategy allows the installation operating cost to be minimized and the safe operating for the battery bank to be guaranteed. The strategy is tested using measured data of some climatic parameters of the target area, showing its efficiency in fulfilling the fixed objectives.

Smart Energy and Cost Optimization for Hybrid Micro-Grids

2016 ◽  
pp. 287-312
Author(s):  
Imene Yahyaoui ◽  
Rachid Ghraizi ◽  
Fernando Tadeo ◽  
Marcelo Eduardo Vieira Segatto
Keyword(s):  
Control Strategy ◽  
Power Flow ◽  
Cost Optimization ◽  
Operating Cost ◽  
Target Area ◽  
Diesel Generator ◽  
Power Sources ◽  
Battery Bank ◽  
Micro Grids ◽  
Safe Operating

This chapter is concerned with the energy management of a hybrid micro-grid composed of photovoltaic/ wind/ battery bank and diesel generator, which is used to supply domestic loads. Hence, a control strategy is proposed to manage the power flow between the power sources and the loads, which ensures the maximization of the renewable sources use, and therefore the minimization of the battery bank and diesel generator use. The control strategy allows the installation operating cost to be minimized and the safe operating for the battery bank to be guaranteed. The strategy is tested using measured data of some climatic parameters of the target area, showing its efficiency in fulfilling the fixed objectives.

Fuzzy Control of Supercapacitor Current in Hybrid Diesel Generator/Fuel Cell Marine Power System

2015 ◽  
Vol 12 (2) ◽  
Author(s):  
Amin Hajizadeh ◽  
Amir Hossein Shahirinia ◽  
David C. Yu
Keyword(s):  
Fuel Cell ◽  
Fuzzy Control ◽  
Power System ◽  
Control Strategy ◽  
Current Control ◽  
Voltage Source ◽  
Voltage Source Converter ◽  
Diesel Generator ◽  
Storage Unit ◽  
Power Sources

This paper presents a power control strategy for a marine power system made up of a hybrid diesel generator, a fuel cell, and an energy storage unit. For this purpose, a self-tuning fuzzy control is designed to manage the power generation between power sources during different maneuverings and voltage disturbances (both balanced and unbalanced) in an AC system. As a solution, a current control strategy using a voltage source converter is presented. Simulation results show the response of the whole system under a test driving cycle and this variety of voltage disturbance conditions. They illustrate the performance, including power flow control and voltage disturbance ride-through capability, of the proposed control strategy.

scholarly journals Optimization of an Autonomous Hybrid Power System for an Academic Institution

2020 ◽  
Vol 5 (10) ◽  
pp. 1160-1167
Author(s):  
Usman Alhaji Dodo ◽  
Evans Chinemezu Ashigwuike ◽  
Najashi Barau Gafai ◽  
Emmanuel Majiyebo Eronu ◽  
Abdullahi Yusuf Sada ◽  
...  
Keyword(s):  
Power Supply ◽  
Operating Cost ◽  
Carbon Dioxide Emission ◽  
Solar Pv ◽  
Diesel Generator ◽  
Power Sources ◽  
Research Activities ◽  
Cost Of Energy ◽  
Alternative Power ◽  
Battery Energy

The epileptic power supply in Nigeria is enormously impeding universities’ administrative, academic, and research activities. The diesel generators on which most of these institutions rely as alternative power sources during grid failures are not viable solutions as the grid outage is incessant and the duration usually lasts for hours, at times for days. The effects of these are high running costs and increased environmental pollution. If normal activities in the universities are to continue unhindered and to reduce the health risks associated with the fossil-based generators, there is the need to explore other alternatives such as utilizing the environmentally-friendly, free and abundant renewable resources to meet their electricity demands. The present study uses Hybrid Optimization of Multiple Energy Resources (HOMER) to evaluate two different configurations of a stand-alone diesel generator (DG) system and a hybrid solar photovoltaic(PV)-diesel generator(DG)-battery energy storage (BES) system for sustainable power supply to the Baze University Abuja, Nigeria. The net present cost and levelized cost of energy, operating cost, and carbon dioxide emission of the hybrid PV-DG-BES system are lower by 50%, 30.93%, and 90% respectively when compared to the stand-alone DG system. Therefore, a hybrid solar PV-DG-BES system is a suitable technology to sustainably power the University.

Control strategy of DC micro grids based on power flow

2017 ◽  
Author(s):  
Zhenghong Chen ◽  
Tao Zheng ◽  
Zhengyuan Li ◽  
Kangda Wang ◽  
Wei Ba
Keyword(s):  
Control Strategy ◽  
Power Flow ◽  
Micro Grids

scholarly journals Research on Frequency Control of Islanded Microgrid with Multiple Distributed Power Sources

Processes ◽  
2020 ◽  
Vol 8 (2) ◽  
pp. 193 ◽  
Author(s):  
Liu ◽  
Wang ◽  
Wang
Keyword(s):  
Energy Management ◽  
Control Strategy ◽  
Power Supply ◽  
Frequency Control ◽  
Operating Cost ◽  
Frequency Stability ◽  
Frequency Change ◽  
Power Sources ◽  
Distributed Power ◽  
Islanded Microgrid

At present, some achievements have been made in the research on the energy management of microgrid operation. However, the research is mainly on the operation of grid-connected microgrid, while the research on the energy management of islanded microgrid is still relatively few. Frequency is one of the characteristics that affects the reliability and power quality of the microgrid. The essence of controlling frequency stability is to maintain source-load balance and redistribution of active power. Therefore, this paper proposes a frequency control strategy based on dynamically cutting machine to reduce load by analyzing the use priority of different distributed power supply and the division of load importance degree, and combining the influence degree of different frequency variation range on microgrid. To coordinate and control distributed power supply, energy storage device, and load in different frequency change areas, this paper proposes different control strategies. The seed strategies of the control strategy are discussed one by one. Experimental results show that the frequency control strategy can significantly improve the frequency stability of the power supply system and reduce the operating cost of islanded microgrid.

Robust augmented H∞ shift control strategy for power-split system with a two-speed AMT gearbox of a heavy commercial vehicle

2020 ◽  
pp. 095440702097709
Author(s):  
Xiaohua Zeng ◽  
Zhenwei Wang ◽  
Dafeng Song ◽  
Dongpo Yang
Keyword(s):  
Control Strategy ◽  
Commercial Vehicle ◽  
Kinetic Equations ◽  
Substantial Improvement ◽  
Transmission System ◽  
Power Sources ◽  
Shift Control ◽  
Power Split ◽  
Heavy Commercial Vehicle ◽  
Split System

The coordination control of a transmission system has gradually attracted more attention with the development of hybrid electric vehicles. However, nonlinear coupling of multiple power sources, superposition of different dynamic characteristics in multiple components, and withdrawal and intervention for a power-split powertrain with a two-speed automated manual transmission (AMT) gearbox can cause jerk and vibration of the transmission system during the shift, which has higher requirements and challenges for the overall performance improvement of the system. This paper designs a novel, robust, augmented H∞ shift control strategy for a power-split system with a two-speed AMT gearbox of a heavy commercial vehicle and verifies the strategy’s effectiveness with simulations and experiments. First, the dynamic plant model and kinetic equations are established, and the shift is divided into five stages to clearly reveal the jerk and vibration problem. Based on augmented theory, a robust H∞ shift control strategy is proposed. Shift coordination is transformed into a speed tracking problem, and state variable and disturbance are reconstructed to obtain a new augmented system. Simulation and hardware-in-the-loop test are carried out to verify the effectiveness of the strategy, which mainly includes simulation of pneumatic actuator and H∞ control strategy. Results show that the proposed H∞ control strategy can greatly reduce the jerk of the transmission system. The jerk produced by the proposed strategy is decreased from 20.4 to 4.07 m/s3, leading to a substantial improvement of 80%. Therefore, the proposed strategy may offer a theoretical reference for the actual vehicle controller during the shift.

Research on the power sharing capacity of a dual power open-end winding PMSM drive system for vehicular applications

2021 ◽  
pp. 095440702110078
Author(s):  
Yifan Jia ◽  
Zhonghua Huang ◽  
Liang Chu ◽  
Xiaoxiang Na ◽  
Nan Xu ◽  
...  
Keyword(s):  
Power Flow ◽  
Permanent Magnet Synchronous Motor ◽  
Drive System ◽  
Power Sharing ◽  
Power Sources ◽  
Voltage Vector ◽  
Vector Distribution ◽  
Maximum Torque Per Ampere ◽  
Open End Winding ◽  
Dual Power

An open-end winding permanent magnet synchronous motor (OW-PMSM) fed by dual inverter is a competitive option for the drive system of dual power electric vehicles. It allows manageable power flow between two isolated power sources through the motor without requiring a DC/DC converter. Based on the mathematical model of the OW-PMSM and the principles of power sharing, this paper first compares the power sharing capacity among some existing torque regulation algorithms, including unit power factor (UPF) control, maximum torque per ampere (MTPA) control, and constant back electromotive force (CBE) control. Then a control algorithm named minimum voltage vector amplitude (MVVA) is presented, which features covering the maximum motor operating range and the maximum power sharing range under the linear voltage vector distribution. Simulation results confirm the validity of the proposed MVVA control, and demonstrate its advantages in vehicular applications.

scholarly journals Control Strategy of Mode Transition with Engine Start in a Plug-in Hybrid Electric Bus

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 2989 ◽  
Author(s):  
Yang ◽  
Zhang ◽  
Zhang ◽  
Tian ◽  
Hu
Keyword(s):  
Control Strategy ◽  
Transition Process ◽  
Structural Features ◽  
Driving Performance ◽  
The State ◽  
Switching Process ◽  
Mode Switching ◽  
Mode Transition ◽  
Power Sources ◽  
Hybrid Electric

Torque coordinated control of the relevant power sources has an important impact on the vehicle dynamics and driving performance during the mode transition of the hybrid electric vehicles(HEVs). Considering the dynamic impact problem caused by mode transition, this paper, based upon the structural features of axially paralleled hybrid power system, introduces the bumpless mode switching control theory to analyze multi-mode transition. Firstly, the state transition process is abstracted as the state space transition problem of hybrid system. Secondly the mode transition is divided into four sub-states, and the state model of each sub-state is established. Thirdly, taking the cost functions as the optimization objective, the state switching process is solved, and the control vectors of each switching process are obtained. Simulation and experimental results show that the proposed control strategy can effectively suppress torque fluctuation, avoid longitudinal acceleration impact, and improve driving performance.

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