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- 摘要
- 关键词
- 实验方案
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[IEEE 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC) - Waikoloa Village, HI (2018.6.10-2018.6.15)] 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC) - Optimal Use of Distributed Resources to Control Energy Variances in Microgrids
摘要： This paper presents the optimization of distributed energy resources in a community microgrid. An optimal power flow is used to determine the optimal allocation of resources using an evolutionary programming method, achieving the lowest cost of supplying the demand while accounting for physical and operational constraints. The energy variances were managed and controlled within the microgrid. Different scenarios of high integration of distributed resources were studied using the algorithm. The utility could be used to supply a constant energy block or for backup power. The algorithm was successfully used to allocate resources while achieving a high load factor value.
关键词： Demand Response,Distributed Energy Resources,Optimal Power Flow,Microgrids,Photovoltaic Systems,Battery Storage Systems
更新于2025-09-11 14:15:04
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[IEEE 2017 IEEE 44th Photovoltaic Specialists Conference (PVSC) - Washington, DC (2017.6.25-2017.6.30)] 2017 IEEE 44th Photovoltaic Specialist Conference (PVSC) - Scalability of the Vector Quantization Approach for Fast QSTS Simulation
摘要： Quasi-static time-series (QSTS) provides the necessary simulation fidelity on the impact that new energy resources would have on a specific distribution system feeder. However, this simulation can often take 10-120 hours for a single study, on traditional computers. The vector quantization approach proposed in [1] demonstrated very attractive computational time reduction for feeders with limited number of input time-series profiles and few distribution system voltage control elements. In this work, we expend on this algorithm and address this issue to model feeders of any complexity while maintaining a high computational time reduction. We demonstrate a 98.7% reduction on a real distribution system feeder with 2969-bus, 3 load/PV profiles, and 8 voltage regulating elements.
关键词： power system simulation,power system planning,photovoltaic systems,smart grid
更新于2025-09-11 14:15:04
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Grid-Connected Photovoltaic Power Plant without Phase Angle Synchronization Able to Address Fault Ride-Through Capability
摘要： This paper discusses the control of large-scale grid-connected photovoltaic power plants (GCPPPs) operating under unbalanced grid voltage sags. The positive and negative sequences of the output currents are controlled to achieve different targets: injecting constant power (i) to the grid, or (ii) to the ac side of the converter, i.e., including the filter and the grid. Traditionally, synchronization with the grid voltages is required, which is usually performed by a phase-locked-loop (PLL) technique. In this paper, the proposed control technique does not require any grid voltage synchronization. An arbitrary angle is used instead with the only requirement of having a frequency equal or close to the grid frequency. The fault-ride-through capability of the GCPPP during unbalanced voltage sags is addressed by proposing a current limiter. Simulation and experimental results verify the performance of the proposed GCPPP.
关键词： Power system faults,Phase locked loops,Photovoltaic systems,Fault current limiters
更新于2025-09-11 14:15:04
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Study of Power Optimizers for grid-connected photovoltaic systems
摘要： The use of Photovoltaic (PV) energy is increasing and the high penetration of PV in the power grid creates several challenges. The main challenge consists in reducing power losses in conversion. The main losses are those caused by total and partial shading, mismatch losses, ohmic loss, and temperature. In this occasion, Power Optimizer for Photovoltaic Systems (POPS) have recently appeared, which aim at increasing the energy conversion of the PV system. Thus, this work presents the POPS and performs simulations with PV*SOL software verifying the gain provided under different conditions. As a result, in the best case, Optimization Performance (Op) reached 10.84% (SolarEdge) in Sete Lagoas-MG and 7.17% (Tigo) in Curitiba-PR. Therefore, POPS may be a solution for improving energy conversion of the PV system, mainly due to the ongoing reduction in the cost of power electronics.
关键词： POPS,photovoltaic systems,losses,Power optimizer
更新于2025-09-11 14:15:04
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Improved Restricted Control Set Model Predictive Control (iRCS-MPC) Based Maximum Power Point Tracking of Photovoltaic Module
摘要： This paper presents a robust two stage maximum power point tracking (MPPT) system of the photovoltaic (PV) module using an improved restricted control set model predictive control (iRCS-MPC) technique. The suggested work is improved in two aspects; a revision in conventional P&O algorithm is made by employing three distinct step sizes for different conditions, and an improvement in conventional MPC algorithm. The improved MPC algorithm is based on the single step prediction horizon that provides less computational load and swift tracking of maximum power point (MPP) by applying the control pulses directly to the converter switch. The computer aided experimental results for various environmental scenarios revealed that compared with the conventional method (conventional P&O + MPC), for the PV power and inductor current, the undershoot and overshoot is decreased to 68% and 35% respectively under stiff environmental conditions. In addition, the settling time needed to reach a stable state is significantly reduced in the proposed system. The viability of the solution suggested is verified in MATLAB/Simulink and by hardware experimentation.
关键词： maximum power point tracking (MPPT),photovoltaic systems,MPC,Boost converter,dc-dc power conversion,model predictive control (RCS-MPC)
更新于2025-09-11 14:15:04
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[IEEE 2019 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA) - Manizales, Colombia (2019.5.30-2019.5.31)] 2019 IEEE Workshop on Power Electronics and Power Quality Applications (PEPQA) - Integration of Photovoltaic System in Low Voltage Electrical Network of the Electrical Engineering Building
摘要： The quantification of the impacts of photovoltaic system (PV) integration in the low voltage (LV) power grid is necessary for the historical evaluation of the electrical network with and without PV penetration. This paper presents the study case of the LV electrical network of a university building (Colombia), which has a 9.1 kW PV system. Specifically, the electrical variables monitored were voltages (V), frequency (f), active power (W), voltage distortion (THDv), and harmonics at the Point of Common Coupling (PCC), to determine impairments according to Std. IEEE 1547-2018. PV systems could change the RMS value of voltage at the PCC, therefore, this variable was analysed. Likewise, the frequency was analysed to corroborate the no affectation of the interconnection of the PV system to the electrical network; it is due to the absence of rotational inertia. The solar irradiation information was measured by a pyranometer and the electrical variables by an smart meter, recording the information every 10 minutes for 32 days. The above is an initial step for a comprehensive evaluation of electrical variables with PV generation and future integration of parameters for the resilience evaluation of the electric network.
关键词： harmonics,frequency,photovoltaic systems,resilience,voltage,irradiation solar,Distributed generation
更新于2025-09-11 14:15:04
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Factors Influencing Social Perception of Residential Solar Photovoltaic Systems in Saudi Arabia
摘要： Saudi Arabia has taken major steps to shift from an oil-centered to more environmentally-focused economy. One approach made recently is to enable households to possess and generate electricity by using small-scale residential solar photovoltaic systems (RSPSs). However, the number of applications to install this technology in residences is signi?cantly low. Social acceptance of solar energy is essential for a successful energy transition. Hence, the present study aims to examine factors that may potentially motivate or impede individuals from purchasing RSPSs based on the di?usion of innovations theory. A cross-sectional, web-based survey is conducted including 1498 participants from the ?ve main regions of Saudi Arabia. Results revealed a good cognition level in relation to solar energy, where the majority (64–83%) of respondents are aware of the bene?ts. An overwhelming proportion of the respondents (97%) associate RSPSs with a signi?cantly positive image, with no signi?cant variation in the acceptance or rejection rates among the ?ve areas covered by the survey (p = 0.1). The results also show high statistical signi?cance for the di?erences between RSPS acceptors and rejecters in all innovation attributes (p < 0.001). However, the perception of relative advantage has a higher correlation with acceptance RSPSs. These perceived advantages were of rather long-term non?nancial bene?ts, such as environmental protection against global warming and provision of unlimited power, rather than the revenue related to direct costs bene?ts. The study also revealed that the installation cost was the most signi?cant barrier to adopting the RSPS, which can be a focus for RSPS dissemination policies.
关键词： public acceptance,residential solar photovoltaic systems,innovation discussion,social perception
更新于2025-09-11 14:15:04
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Life cycle analysis of a building integrated photovoltaic system operating in Bogotá, Colombia
摘要： In this study, the environmental behavior was characterized for a 840 Wp building-integrated photovoltaic (BIPV) system installed in the Department of Physics of the Faculty of Sciences at the National University of Colombia, Bogota campus. The methodology focused on the application of the international technical standards for Life Cycle Analysis (LCA) from cradle to grave based on the NTC ISO 14040 and NTC ISO 1404 standards, which regulate the methodological procedure. This article is based on comparing the potential of environmental impacts of five power generation scenarios, taking as reference the installation of the photovoltaic system (PV) at the University. During the analysis it was possible to determine that energy generation with coal has a greatest environmental impact compared with photovoltaics: 84% and 6% respectively. This represents 1138.8 gCO2eq/kWh for coal, compared to 35 gCO2eq/kWh for the PV system.
关键词： Solar energy,Solar cells,Greenhouse emissions,Photovoltaic systems,Life cycle analysis
更新于2025-09-11 14:15:04
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[IEEE 2019 IEEE PES Innovative Smart Grid Technologies Conference - Latin America (ISGT Latin America) - Gramado, Brazil (2019.9.15-2019.9.18)] 2019 IEEE PES Innovative Smart Grid Technologies Conference - Latin America (ISGT Latin America) - A MISO Nonlinear Model of Photovoltaic Panel Based on System Identification
摘要： The growth in the use of renewable energy sources has made photovoltaic (PV) systems increasingly popular. PV systems are mostly composed of a PV panel to generate dc power and an inverter to convert dc to ac power. Many events may occur on the PV modules, resulting in possible faults and loss of generated power, due to their exposure to environmental conditions. Thus, modeling the PV panel allows to determine the estimation of the output power of the PV system. In this context, this paper presents a nonlinear model based on the black-box modeling of System Identi?cation. In addition, Hammerstein-Wiener (HW) model structure was selected due to its simplicity of representing the nonlinearity of the PV panel. The irradiance and temperature on the PV panel represent the input signals for the proposed model. The current and voltage are measured to calculate the output power, resulting in a Multi Input Single Output (MISO) model. The proposed HW model is compared with the classical Single Diode Model and the results show that the proposed model is more accurate.
关键词： Hammerstein-Wiener,black-box modelling,System Identi?cation,Photovoltaic Systems
更新于2025-09-11 14:15:04
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Five-Level Transformerless Inverter for Single-Phase Solar Photovoltaic Applications
摘要： Transformerless inverters are extensively employed in grid connected photovoltaic (PV) generation systems due to its advantages of achieving low cost and high efficiency. However, the common mode voltage issues have been motivated the proposition of new topologies, control and modulation schemes. In common-ground PV inverters the grid neutral line is directly connected to the negative pole of the dc bus. Therefore, the parasitic capacitances are bypassed and the leakage current can be eliminated. In this paper a five-level common ground transformerless inverter with reduced output harmonic content for PV systems is proposed. In addition, the proposed inverter can process reactive power and it presents a maximum dc-voltage utilization in opposition to half-bridge based topologies. The operation modes of the proposed inverter, a simple modulation strategy, as well as the design guidelines are analyzed in detail. Finally, experimental results demonstrate the feasibility and good performance of the proposed inverter.
关键词： Photovoltaic systems,transformerless inverters,common ground voltage,multilevel inverters
更新于2025-09-11 14:15:04