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micro-grid Planning with Aggregator’s Role in the Renewable Inclusive Prosumer Market

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Journal of Power and Energy Engineering 2022年第4期10卷 47-62页

作者： Saurav Sharma Suresh Khator Department of Industrial Engineering University of Houston Houston TX USA

The paper proposes a model for a micro-grid architecture incorporating the role of aggregators and renewable sources on the prosumer side, working together to optimize configurations and operations. The final model takes the form of a mixed-integer linear programming model. This model is solved using the CPLEX solver via GAMS by having a consistent data set.

关键词： Optimization micro-grid Prosumers Aggregators Renewable Energy Analytics

Photocatalytic performance of TiO_2 thin films connected with Cu micro-grid

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Science China(Technological Sciences) 2009年第8期52卷 2175-2179页

作者： ZHU HaiLing1, ZHANG JunYing1, WANG TianMin1, WANG LiuGang1, LAN Xiang1 & HUANG BaiBiao2 1 School of Science, Beihang University, Beijing 100191, China 2 State Key Laboratory of Crystal Materials, Shandong University, Ji’nan 250100, China School of Science Beihang University Beijing China State Key Laboratory of Crystal Materials Shandong University Ji’nan China

Aiming at reducing the recombination of photo-induced carriers in semiconductor photocatalytic process, we prepared TiO2 thin film with its surface modified by a connected Cu micro-grid via a microsphere lithography strategy, which showed higher photocatalytic activity than the pure TiO2 film. The improvement of photocatalytic activity of Cu micro-grid to the TiO2 film is due to the charge carrier separation and electron transfer by the conducting metal grid. The photocatalytic activity was improved as metal loading increased, which obtained the best performance at a certain loading amount, and then decreased at higher loading amount. This phenomenon was attributed to the metal’s bulk effect which could be explained by the relationship between the energetic positions and the metal cluster size.

关键词： surface modification photocatalysis PS microspheres micro-grid

Optimal configuration strategy of energy storage system in high photovoltaic penetration micro-grid based on voltage sensitivity analysis

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High Technology Letters 2019年第3期25卷 294-302页

作者：欧阳静 Pan Guobin Chen Jinxin Chai Fushuai Zhang Libin Key Laboratory of Special Purpose Equipment and Advanced Manufacturing Technology Ministry of Education & Zhejiang ProvinceZhejiang University of Technology

Energy storage is an effective measure to deal with internal power fluctuation of micro-grid and ensure stable operation, especially in the micro-grid with high photovoltaic(PV) penetration. Its capacity configuration is related to the steady, safety and economy of *** order to improve the absorptive capacity of micro-grid on maximizing the use of distributed PV power in micro-grid, and improve the power quality, an optimal energy storage configuration strategy is proposed, which takes many factors into account, such as the topology of micro-grid, the change of irradiance, the load fluctuation and the cable. The strategy can optimize the energy storage allocation model to minimize the storage power capacity and optimize the node *** key electrical nodes are identified by using the sensitivity coefficient of the voltage, and then the model is optimized to simplify calculation. Finally, an example of the European low-voltage micro-grid and a micro-grid system in the laboratory is used to verify the effectiveness of the proposed *** results show that the proposed method can optimize the allocation of capacity and the node of the energy storage system.

关键词： high photovoltaic(PV) penetration micro-grid energy storage configuration voltage sensitive coefficient

Levy-flight moth-flame optimisation algorithm-based micro-grid equipment sizing:An integrated investment and operational planning approach

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能源与人工智能(英文) 2021年第1期3卷 126-150页

作者： Soheil Mohseni Alan C.Brent Daniel Burmester Will N.Browne Sustainable Energy Systems Faculty of EngineeringVictoria University of WellingtonWellington 6140New Zealand Department of Industrial Engineering and the Centre for Renewable and Sustainable Energy Studies Stellenbosch UniversityStellenbosch 7600South Africa

Bridging the gap between simulation and reality for successful micro-grid(MG)implementation requires accu-rate mathematical modelling of the underlying energy infrastructure and extensive optimisation of the design space defined by all possible combinations of the size of the *** exact mathematical optimisa-tion approaches to the MG capacity planning are highly computationally efficient,they often fail to preserve the associated problem nonlinearities and *** translates into the fact that the available MG sizing tools potentially return a sub-optimal(inferior)MG *** brings to light the importance of nature-inspired,swarm-based meta-heuristic optimisation algorithms that are able to effectively handle the nonlinear and non-convex nature of the MG design optimisation problem–and better approximate the globally optimum solution–though at the expense of increased computational ***,this paper introduces a robust MG capacity planning optimisation framework based on a state-of-the-art meta-heuristic,namely the Lévy-flight moth-flame optimisation algorithm(MFOA).An intelligent linear programming-based day-ahead en-ergy scheduling design is,additionally,integrated into the proposed model.A case study is presented for a real grid-tied community MG in rural New Zealand.A comparison of the modelling results with those of the most popular tool in the literature and industry,HOMER Pro,verifies the superiority of the proposed meta-heuristic-based MG sizing ***,the efficiency of the Lévy-flight MFOA is compared to nine well-established meta-heuristics in the MG capacity planning *** comparative analyses have revealed the statistically significant outperformance of the Lévy-flight MFOA to the examined ***,its superiority to the original MFOA,the hybrid genetic algorithm-particle swarm optimisation,and the ant colony optimiser,by at least~6.5%,~8.4%,and~12.8%,is ***

关键词： micro-grid Techno-economic Meta-heuristic Optimal sizing Operational planning Smart grid Optimization

Short-time Voltage Variance Detection of micro-grid with Direct-drive Wind Power Generation 26th

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Short-time Voltage Variance Detection of Micro-grid with Dir...

An Optimal Coordination Control Strategy of micro-grid Inverter and Energy Storage Based on Variable Virtual Inertia and Damping of VSG

第26届中国控制与决策会议

作者： ZHOU Jian-ping ZHU Jian-ping School of Automation Engineering Shanghai University of Electric Power

ISBN: (纸本)9781479937097

Simulation model of micro-grid including a direct-drive wind power generation, two sets of power-controlled distributed generations（DGs） and a three-phase fault module was investigated in Matlab/simulink. Based on the constructed model, the operating process switched from island mode to grid-connected mode was simulated and the voltage variance signal was detected with Daubechies（Db） wavelet. The simulation results show that the singularity of voltage variance was quickly and accurately detected with db wavelet. The fast and accurate detection of short-circuited fault signal is helpful to improve power quality of micro-grid.

关键词： micro-grid wind power generation Db wavelet voltage variance

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Chinese Journal of Electrical Engineering 2017年第3期3卷 25-33页

作者： Xing Zhang Fubin Mao Haizhen Xu Fang Liu Ming Li School of Electrical Engineering and Automation Hefei University of TechnologyHefei 230009China

The virtual inertia and virtual damping affect both the dynamic stability of the virtual synchronous generator(VSG)and the configuration of energy storage,but there is a conflict between them while selecting the virtual inertia and virtual *** optimal coordination control strategy of micro-grid inverter and energy storage based on variable virtual inertia and damping is proposed to mitigate this *** the integrated optimal constraint of the VSG frequency variation and the energy storage capacity,the virtual inertia and damping of VSG are configured dynamically,adopting linear quadratic optimal *** can suppress the oscillations of the active power and frequency to improve the stability of VSG and optimally configure the energy storage capacity of VSG *** proposed strategy aims to improve the control performance of micro-grid inverter and the system *** simulation and experimental results verify the effectiveness of the strategy.

关键词： Virtual synchronous generator(VSG) micro-grid frequency variation variable inertia and damping optimal control

Research on Optimization Scheduling of Wind/Solar/Diesel/Storage micro-grid Based on Genetic Algorithm

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Research on Optimization Scheduling of Wind/Solar/Diesel/Sto...

micro-grid Smooth Switchover Method Based on Controller State Following

第36届中国控制会议

作者： Zhou Hao Wu Qiuxuan Chi Xiaoni Lin Weijie Luo Yanbin Institute of Automation Hangzhou Dianzi University School of Youngman Automotive Hangzhou Vocational & Technological School

ISBN: (纸本)9781538629185

In this paper,we focus on the objective function of the economic cost and environment cost of wind/solar/diesel/storage micro-grids,and use the method of linear-weighting to establish the optimal scheduling mode of union *** the basis of making full use of renewable energy,the genetic algorithm is used to solve the problem of union objective,and created the operation plan of power grid,energy storage battery and diesel *** numerical examples show that under the condition of Island micro-grid system,unrestricted power of grid connection and limited power of grid connection,the optimal scheduling scheme can be obtained under different weights between economy and environment,and has actual reliability,and also plays a guiding role in the micro-grid optimal scheduling strategy.

关键词： micro-grid union objective optimal scheduling genetic algorithm

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Journal of Power and Energy Engineering 2015年第4期3卷 128-135页

作者： Yang Fu Lisha Huang Jingjing Zhao Shanghai University of Electric Power Shanghai China

micro-grid smooth switchover between different operation modes is important for steady operation and reliable power supply of micro-grid. In order to reduce the transient fluctuation of voltage and frequency during switchover, this paper proposed a new switchover method based on controller state following. When transferring to island mode, the control method for inverter of storage device changed from PQ control to V/f control. Before switchover, the output of V/f controller is always following the output of PQ controller. So that the sudden change of output is avoided at the moment of switchover. A micro-grid model with photovoltaic and battery is built on DIgSILENT Power Factory simulation software, to simulate micro-grid switchover from grid-connected mode to island mode. Results show this method can effectively suppress the transient fluctuation of voltage and frequency, and reduce the influence of transient process on power grid. This conclusion has important practical significance on micro-grid smooth switchover from grid-con- nected mode to island mode.

关键词： micro-grid Smooth Switchover Controller State Following

Optimal Partitioning of Distribution Networks for micro-grid Operation

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Journal of Power and Energy Engineering 2017年第9期5卷 104-120页

作者： Shane J. Kimble Divya T. Vedullapalli Elham B. Makram Holcombe Department of Electrical and Computer Engineering Clemson University Clemson SC USA

A great concern for the modern distribution grid is how well it can withstand and respond to adverse conditions. One way that utilities are addressing this issue is by adding redundancy to their systems. Likewise, distributed generation (DG) is becoming an increasingly popular asset at the distribution level and the idea of microgrids operating as standalone systems apart from the bulk electric grid is quickly becoming a reality. This allows for greater flexibility as systems can now take on exponentially more configurations than the radial, one-way distribution systems of the past. These added capabilities, however, make the system reconfiguration with a much more complex problem causing utilities to question if they are operating their distribution systems optimally. In addition, tools like Supervisory Control and Data Acquisition (SCADA) and Distribution Automation (DA) allow for systems to be reconfigured faster than humans can make decisions on how to reconfigure them. As a result, this paper seeks to develop an automated partitioning scheme for distribution systems that can respond to varying system conditions while ensuring a variety of operational constraints on the final configuration. It uses linear programming and graph theory. Power flow is calculated externally to the LP and a feedback loop is used to recalculate the solution if a violation is found. Application to test systems shows that it can reconfigure systems containing any number of loops resulting in a radial configuration. It can connect multiple sources to a single microgrid if more capacity is needed to supply the microgrid’s load.

关键词： Distributed Generation (DG) Supervisory Control and Data Acquisition (SCADA) Distribution Automation (DA) Fault Location Isolation and Restoration (FLISR) Self-Healing Network micro-grid Smart grid