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[IEEE 2019 International Conference on Sustainable Energy Engineering and Application (ICSEEA) - Tangerang, Indonesia (2019.10.23-2019.10.24)] 2019 International Conference on Sustainable Energy Engineering and Application (ICSEEA) - Power Control among Photovoltaics and Electric Energy Storages in DC Microgrid
摘要： Photovoltaic (PV) is one of the most popular renewable energy sources today. Outputs of PVs are fluctuated according to the sunlight intensity. Contrary with the PVs outputs, the Microgrid networks are required continuous power for supplying their load demands. To overcome this issue, the Electrical Energy Storages (ESSs) are introduced in the DC Microgrid network. Introducing PVs and ESSs in the same network poses several issues. The control of the voltages, currents and powers outputs among PVs and ESSs during load demand fluctuations is one of the critical issue which should be considered. On the other hand, The PVs and ESSs have different generated power capacities and hence, the suitable control candidate should be able to adjust the generated power by PVs and ESSs according to their capacities. There are three operational modes options in DC Microgrid based PVs and ESSs. These operational modes are introduced, analyzed, simulated and discussed in this paper. The performance of the proposed method is conducted via computer simulation of Simulink during fluctuations of the load demands. The simulation results indicate that the proposed method is successful to maintain the network voltages are within acceptable limit during load demands fluctuations. And the generated power by PVs and ESSs are regulated within designated capacities as well.
关键词： power control,photovoltaic,electric energy storage,voltage control,DC microgrid
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Chengdu, China (2019.5.21-2019.5.24)] 2019 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Modeling and Simulation of Virtual Synchronous Generator for Photovoltaic Inverter
摘要： The rise of photovoltaic installed capacity brings severe challenges to the safe and stable operation of the power grid. If the grid-connected inverter of the photovoltaic system can simulate the moment of inertia and frequency modulation characteristics of the synchronous generator according to external characteristics, the stability of the photovoltaic system can be improved. Therefore, the virtual synchronous generator control strategy (VSG) is proposed. This paper builds a generic simulation model of current source type photovoltaic inverter based on VSG technology, which can simulate a series of VSG behaviours including virtual inertia control, damping control, primary frequency control, reactive power control and fault ride through. The developed simulation model is also validated comparing to the actual PV power plant testing data, which shows accurate and reliable simulation results. The model of photovoltaic inverter can provide theoretical and model basis for the study of grid-connected stability and grid-connected operational characteristics.
关键词： VSG,photovoltaic inverter,Damping control,Droop control,Microgrid
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE International Conference on Modern Electrical and Energy Systems (MEES) - Kremenchuk, Ukraine (2019.9.23-2019.9.25)] 2019 IEEE International Conference on Modern Electrical and Energy Systems (MEES) - Economic Efficiency of a Photovoltaic Power Plants
摘要： This paper presents the development of an intelligent dynamic energy management system (I-DEMS) for a smart microgrid. An evolutionary adaptive dynamic programming and reinforcement learning framework is introduced for evolving the I-DEMS online. The I-DEMS is an optimal or near-optimal DEMS capable of performing grid-connected and islanded microgrid operations. The primary sources of energy are sustainable, green, and environmentally friendly renewable energy systems (RESs), e.g., wind and solar; however, these forms of energy are uncertain and nondispatchable. Backup battery energy storage and thermal generation were used to overcome these challenges. Using the I-DEMS to schedule dispatches allowed the RESs and energy storage devices to be utilized to their maximum in order to supply the critical load at all times. Based on the microgrid’s system states, the I-DEMS generates energy dispatch control signals, while a forward-looking network evaluates the dispatched control signals over time. Typical results are presented for varying generation and load profiles, and the performance of I-DEMS is compared with that of a decision tree approach-based DEMS (D-DEMS). The robust performance of the I-DEMS was illustrated by examining microgrid operations under different battery energy storage conditions.
关键词： microgrid,Adaptive dynamic programming,reinforcement learning,evolutionary computing,dynamic energy management system (DEMS),renewable energy,neural networks
更新于2025-09-16 10:30:52
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IoT-enabled dependable control for solar energy harvesting in smart buildings
摘要： Efficiency and reliability have been essential requirements for energy generation in smart cities. This study presents the design and development of dependable control schemes for microgrid management, which can be seamlessly integrated into the management system of smart buildings. Here, to recover from failures in the solar energy system of a building microgrid, dependable controllers are proposed along with their hardware implementation. The system features the use of Internet of Things (IoT) as its core to coordinate the operation of multiple subsystems in a scalable manner. The control scheme uses a number of controllers cooperatively functioning via a token-based mechanism within the network to provide redundancy and thus reliability in solar tracking. The system exploits data from not only local in-situ sensors but also online sources via IoT networks for fault-tolerant control. Experiments conducted in a 12-storey building indicate that the harvested solar energy meets the design requirement while the control reliability is maintained in face of communication or hardware disruptions. The results confirmed the validity of the proposed approach and its applicability to energy management in smart buildings.
关键词： dependable control,smart buildings,IoT,solar energy,microgrid management
更新于2025-09-16 10:30:52
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Control Strategy of the Pumped Storage Unit to Deal with the Fluctuation of Wind and Photovoltaic Power in Microgrid
摘要： With the development and utilization of distributed energy and microgrid, distributed energy storage has become a new development trend. However, small pumped storage units have the advantages of ?exible engineering location, low investment, quick e?ect, low requirements on transmission lines, and a better solution to the peak load demand of the system. Therefore, it is more and more used in the microgrid, and it conducts joint dispatching with wind power, photovoltaic, and other clean energies. To solve the capacity problem of small pumped storage units within the microgrid, a new control strategy is proposed in this paper. Two pumped storage units are used for joint operations. Taking the smoothed combined output power of wind power, photovoltaic power, and pumped storage power as the target, and considering the limitations of transmission lines, the constraints of wind power and photovoltaic power ?elds as well as the restrictions of pumped storage power units and corresponding reservoirs are taken into account. In this paper, social particle swarm optimization (SPSO) with improved weight is used to calculate and solve the model. The e?ectiveness of the new control strategy is veri?ed.
关键词： microgrid dispatch,particle swarm optimization,pumped storage unit,control strategy,renewable energies
更新于2025-09-16 10:30:52
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[IEEE 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Paris, France (2019.9.1-2019.9.6)] 2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) - Flexible control of broadband terahertz radiations from laser plasmas
摘要： This paper presents a novel energy-management method for a microgrid that includes renewable energy, diesel generators, battery storage, and various loads. We assume that the microgrid takes part in a pool market and responds actively to the electricity price to maximize its pro?t by scheduling its controllable resources. To address various uncertainties, a risk-constrained scenario-based stochastic programming framework is proposed using the conditional value at risk method. The designed model is solved by two levels of stochastic optimization methods. One level of optimization is to submit optimal hourly bids to the day-ahead market under the forecast data. The other level of optimization is to determine the optimal scheduling using the scenario-based stochastic data of the uncertain resources. The proposed energy management system is not only bene?cial for the microgrid and customers, but also applies the microgrid aggregator and virtual power plant. The results are shown to prove the validity of the proposed framework.
关键词： microgrid,Controllable load,risk management,smart grid,stochastic optimization,electricity market,renewable energy,energy management
更新于2025-09-16 10:30:52
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Harmonics assessment and mitigation in a photovoltaic integrated network
摘要： This paper presents a comprehensive review of harmonics dominance in PV integrated network. The findings of the review conducted for different scenarios are further supported by the results of an experimental case study exploring the dominance of harmonics in a real time PV integrated microgridunder varying solar irradiance condition. It is concluded that the level of Total Harmonic Distortions (THD) in the power system network varies in different scenarios. Some of the important scenarios are: (i) percentage of PV penetration in distribution network with respect to the types of connected load, (ii) location of PV integration, (iii) effect of harmonic resonance in power network, and (iv) varying power output of PV inverters with varying solar irradiance. A harmonic management system is finally proposed to limit the excessive harmonics in the network under different network conditions. The proposed harmonic management can be used to maintain the THD level within the standard limit and ensures the quality of energy supply to the communities.
关键词： Solar irradiance,Harmonic resonance,Photovoltaic (PV),Total harmonic distortion (THD),Microgrid (MG)
更新于2025-09-16 10:30:52
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Data-Driven Robust Coordination of Generation and Demand-side in Photovoltaic Integrated All-Electric Ship Microgrids
摘要： Fully electrified ships, which is known as the “all-electric ships (AESs)”, have the potentials to bring great economic /environmental benefits. To further improve the energy efficiency of AESs, PV generations are gradually integrated, which introduces uncertainties to the AES operation. However, current researches mostly focus on sizing problem whereas rarely concern the operation. In this perspective, a data-driven robust coordination of generation and demand-side is proposed to properly address the onboard PV generation uncertainties as well as reducing the fuel cost of AESs, which consists of an extreme learning machine (ELM) based PV uncertainty forecasting method and a two-stage operating framework, where the first stage for the worst PV generation case and the second stage targets at the uncertainty realization. A 4-DG AES is implemented into the case study and the simulation results show that the ELM-based method can well characterize the PV uncertainties, and the two-stage operating framework can well accommodate the onboard PV uncertainties. Further analysis also demonstrates the proposed method has enough flexibility when facing working condition variations.
关键词： mobile microgrid,robustness,extreme learning machine,coordination of generation and demand-side,All-electric ship,photovoltaic generation
更新于2025-09-12 10:27:22
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[IEEE 2019 IEEE Energy Conversion Congress and Exposition (ECCE) - Baltimore, MD, USA (2019.9.29-2019.10.3)] 2019 IEEE Energy Conversion Congress and Exposition (ECCE) - Design of Bipolar Interface Converter for Purely DC Microgrid with Minimally Processed Maximum Power Point Operation of Photovoltaics
摘要： Bipolar microgrids are important candidates for the design of upcoming purely DC or islanded systems due to the extra resiliency offered by the multi-bus (±190V) system. However, unbalanced loads may be connected to the bipolar buses which makes voltage control for power balance essential for the converter. Dual secondary winding based Dual Active Bridge converter, with output series connection, offers a viable solution due to its inherent galvanic isolation between the source and the loads. To harvest the maximal energy from a series connection of photovoltaics (PV) it is important to continuously operate the system at the maximal power point (MPPT). To ensure low losses and higher energy yield over time, differential power processing based converters can be integrated to the PV modules such that minimum power is processed to achieve MPPT. This work provides a solution for interfacing the unipolar power source to a bipolar load bus, to which loads of two different voltage requirement (±190V or +380V) can be connected by incorporating voltage control in the same converter that interface unipolar voltage bus to bipolar bus.
关键词： bipolar microgrid,dual active bridge,photovoltaics,magnetics,differential power processing
更新于2025-09-12 10:27:22
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Performance of a Hybrid Solar Photovoltaic - Air Source Heat Pump System with Energy Storage
摘要： The paper introduced a smart renewable energy based microgrid system which is composed of three subsystems: solar photovoltaic subsystem, air source heat pump subsystem and energy storage subsystem. This microgrid system was applied to the demonstration project located in Xining City, Qinghai Province, China. The energy performance of the smart renewable energy based microgrid system was evaluated and compared with that of traditional energy supply system which totally depends on the electricity grid and natural gas. The comparison study demonstrates that the proposed hybrid energy supply system is superior to traditional system, significantly decreasing additional energy consumption for buildings and reducing pollutant emissions.
关键词： Energy storage,Heat pump,Solar photovoltaic,Smart microgrid,Renewable energy
更新于2025-09-12 10:27:22