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[IEEE 2018 OCEANS - MTS/IEEE Kobe Techno-Ocean (OTO) - Kobe (2018.5.28-2018.5.31)] 2018 OCEANS - MTS/IEEE Kobe Techno-Oceans (OTO) - Research on Virtual Synchronous Generator Technology Introduced into Solar Ship
摘要： Because of the advantages of energy-saving and emission-reduction, green ships have attracted wide attention from all over the world. At present, the use of renewable energy for all or part of the ship's power supply equipment research, most of the reference or apply the research experience of terrestrial photovoltaic system. In real sailing, the ship’s attitude will change over time because of ocean winds, waves, current and the ship’s moving and rocking. Due to these factors, the irradiance on the ship PV panels is changing with time. The fluctuating power caused by the moving and rocking of ships will also change. In this paper, we presents a new idea of applying a virtual synchronous generator (VSG) technology to a ship, which can stabilize the partial fluctuation power caused by the moving and rocking of the ship. The VSG control strategy can show the characteristics of the synchronous generator (SG) by controlling the distributed power supply. Through virtual inertia and damping links of the VSG to stabilize the fluctuations caused by photovoltaic panels’ moving and rocking on the deck. Here illustrate some key process in this paper. Firstly, considering factors such as wind, wave and flow, the model of photovoltaic power generation in ship is established. Secondly, the VSG is introduced into the solar ship and the virtual inertia and damping coefficient in the VSG are designed by the actual situation. Thirdly, combining the discussion of the actual route from Shanghai to Sydney, simulations are used to verify the effectiveness of the method. Through the above method, not only the volume of the energy storage device and the number of charging and discharging times can be reduced, but also precious ship space can be saved and the stability of the power grid can be improved. New energy power generation equipment can approach the ship power system similar to the SG. Drawing on the experience of the SG power supply system, new energy can be better integrated into the ship power station for management and control.
关键词： Solar ship,Virtual synchronous generator,Virtual inertia and damping coefficient,Ship-swaying
更新于2025-09-23 15:22:29
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[IEEE 2018 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Singapore (2018.5.22-2018.5.25)] 2018 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Matrix Converter for Grid Connected Wind Energy Conversion Systems
摘要： Among the renewables, wind is a cost effective energy source. This paper describes the use of a matrix converter for permanent magnet synchronous generator (PMSG) based grid connected wind turbine systems. A simulation model has been developed using MATLAB/Simulink environment. The system comprises a wind turbine, a PMSG, and a 3-phase matrix converter which acts as an interface between the wind turbine system and the electric power grid. The proposed system can also be used in small scale wind turbine systems that can be employed in environment friendly homes. Simulation results are presented to verify the operation and performance of the proposed system.
关键词： Power converters (PC),Matrix converter (MC),Permanent magnet synchronous generator (PMSG),Wind energy conversion system (WECS)
更新于2025-09-23 15:21:21
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[IEEE 2019 11th International Conference on Information Technology and Electrical Engineering (ICITEE) - Pattaya, Thailand (2019.10.10-2019.10.11)] 2019 11th International Conference on Information Technology and Electrical Engineering (ICITEE) - Activated Carbon as the Counter Electrode on Perovskite Solar Cells
摘要： An open-winding permanent-magnet synchronous generator (PMSG) system with the integration of fully controlled and uncontrolled converter is investigated in this paper, in which half the amount of controllable power switches are needed compared with the conventional open winding system fed by two voltage source converters. The voltage space vector of open winding PMSG is modulated by controlled converter, which will be integrated with the voltage vector by uncontrolled converter to implement the operation of open winding PMSG. In order to analyze and compare the operation capability on the different dc voltage ratios, the available modulation range of the open winding PMSG is analyzed in detail. Moreover, unity power factor control is proposed as the optimized control method to achieve the maximum modulation index. Finally, a 1-kW experimental setup is built to validate the theoretical investigation on the open winding PMSG system.
关键词： integration of fully controlled and uncontrolled converter,unity power factor control,open winding permanent-magnet synchronous generator (PMSG),DC voltage ratio,linear modulation range
更新于2025-09-23 15:19:57
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[IEEE 2019 8th International Conference on Renewable Energy Research and Applications (ICRERA) - Brasov, Romania (2019.11.3-2019.11.6)] 2019 8th International Conference on Renewable Energy Research and Applications (ICRERA) - Optimization Design and Feature Research on VSG Control Strategy of Marine Photovoltaic Grid-connected Inverter
摘要： Aiming at the schedulability and improving stability of photovoltaic (PV) system that integrated within the ship power system (SPS), this paper proposes a virtual synchronous generator (VSG) based control strategy for the PV grid-connected inverter. The virtual inertia power is introduced into the reference power value by a first-order inertia function, so as to change the inertia and damping characteristics of the inverter and show similar operating features as those of traditional diesel synchronous generator (DG). Both droop control and logic threshold control strategies are applied to realize the automatic power distribution between the inverter and the generator. Under the simulation environment of PSCAD/EMTDC software, an original marine PV grid-connected power system model is established. The simulation cases are discussed under two typical operation conditions, which are depended on whether or not the power management system (PMS) is put into the utilization. Then, the active/reactive power distribution response and frequency fluctuation characteristics of these two power sources are compared by applying the traditional constant power (PQ) control and VSG control strategy respectively. The results show that this novelty VSG control strategy has immediate effectiveness in suppressing the frequency fluctuation of the power grid, and realizing the automatic and proportional output power adjustment for the grid-connected inverter, which can significantly improve the grid stability.
关键词： ship,generation,photovoltaic,management system,virtual,power,synchronous,generator,synchronization
更新于2025-09-23 15:19:57
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[IEEE 2019 IEEE Conference on Power Electronics and Renewable Energy (CPERE) - Aswan City, Egypt (2019.10.23-2019.10.25)] 2019 IEEE Conference on Power Electronics and Renewable Energy (CPERE) - Virtual inertia impact on the performance of photovoltaic system
摘要： With the enormous stress of energy lack and air pollution, renewable energy sources such as photovoltaic sources become an effective solution to these problems. The penetration of photovoltaic sources into power system has adverse effects on overall moment of inertia and damping, this threatens system stability. To assist the stability, the concept of virtual synchronous generator (VSG) has introduced as an inverter control method to add virtual inertia to the system. This paper demonstrates the effects of adding virtual inertia on the system performance when fed from a photovoltaic source. The effects of changing the system and VSG parameters on the overall performance is also studied to show the appropriate change in each parameter that enhance the performance. The theoretical results that obtained using the MATLAB/SIMULINK are verified experimentally, using a DSP-based laboratory model that fed from a PV source.
关键词： Virtual synchronous generator (VSG),Distributed generator (DG),Photovoltaic (PV)
更新于2025-09-19 17:13:59
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Enhancing inertia of solar photovoltaic-based microgrid through notch filter-based PLL in SRF control
摘要： More and more wind turbine manufacturers turn to using the full-scale power electronic converter due to the stricter grid code requirements to thoroughly decouple the generator from the grid connection. However, a commonly used type of this generator is still unclear, where the selections of the low-speed (LS; direct-drive) and medium-speed (MS; one-stage) permanent-magnet synchronous generators (PMSGs) are both promising solutions. This paper will assess and compare the reliability metrics for the machine-side converter (MSC) for those two configurations. First, a translation from the mission profile of the turbine to the current and voltage loading of each power semiconductor is achieved based on synchronous generator modeling. Afterward, a simplified approach to calculate the loss profile and the thermal profile is used to determine the most stressed power semiconductors in the converter. Finally, according to the lifetime power cycles, the lifespan can be calculated when operating in various wind classes. It is concluded that, although the LS PMSG is able to eliminate the gearbox, the lifespan of its MSC is lower than the one-stage MS generator.
关键词： loss profile,power electronic converter,thermal profile,Lifetime prediction,permanent-magnet synchronous generator (PMSG)
更新于2025-09-19 17:13:59
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Photovoltaic Synchronous Generator (PVSG): Architecture and Control Strategy for A Grid-Forming PV Energy System
摘要： Transforming conventional PV energy system from a grid following one to a grid forming is necessary when PV power generation is dominating the generation mix and replacing traditional synchronous generators. Grid forming PV energy system can provide frequency support functionality which is vital for the stability of the power grid. This paper presents a novel AC coupled solution that transforms an existing grid following PV system to a grid forming one without any hardware and software modification of the PV inverter. The resulting system, the Photovoltaic Synchronous Generator (PVSG), is achieved by an AC coupled supercapacitor-based energy storage system (ESS). The novel control of the PVSG is implemented in the ESS side. The novel control scheme includes a fast and slow instantaneous power controls. The fast-instantaneous power flow control is fulfilled by the DC-link voltage control and AC voltage control. The cascaded voltage source controls enable the fast-instantaneous power balance, while a slow instantaneous power control is used to implement the inertia and grid synchronization. Two important fundamental functions are realized in the PVSG. The first one is the frequency inertia to resist the grid frequency variation where the df/dt-based power control is achieved; the second one is the inertia against the PV intermittent power. The correctness and effectiveness of the proposed PVSG is validated experimentally in a 480V PVSG prototype with TMS320F28379D DSP controller.
关键词： current controlled,power control,PVSG,virtual synchronous generator (VSG),Inertia,voltage controlled,grid-forming inverter,supercapacitors,energy storage system,inverter control
更新于2025-09-16 10:30:52
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[IEEE 2019 International Conference on Information and Communications Technology (ICOIACT) - Yogyakarta, Indonesia (2019.7.24-2019.7.25)] 2019 International Conference on Information and Communications Technology (ICOIACT) - The Effect of Irradiance on Distribution Power System Stability in Large-Scale Grid-Connected Photovoltaic
摘要： The purpose of this study was to analyze the effect of solar irradiance in the integration of photovoltaic plants (PV) on the stability of the electric power distribution system. The stability aspects assessed were the stability of the distribution network and the stability response of the synchronous generator which work in parallel with the PV generator. Distribution grid stability includes voltage and frequency stability. The stability response of synchronous generators includes power angle stability, active power stability, and reactive power stability. All aspects of stability were simulated based on four different cases of irradiance, namely 550 W/m2, 650 W/m2, 850 W/m2, and 1000 W/m2. PV generators were connected to a distribution grid using an inverter with MPPT and PV systems without batteries. This study was applied to a case of electrical distribution system in Gorontalo province, Indonesia. One distribution feeder in Gorontalo Province was connected a photovoltaic system of 2000 kWp and synchronous generators that work in parallel. The distribution system was modelled in a single-line diagram of 13-buses. The measurement of every solar radiation intensity change was conducted in every electrical distribution power system change. This study showed that high irradiation in PV plants affects the voltage and frequency stability on the grid by increasing proportionately. However, the high irradiation has an effect on increasing power oscillation at synchronous generators.
关键词： Distribution System,Synchronous Generator,Photovoltaic,Power System Stability,Grid-Connected
更新于2025-09-16 10:30:52
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Small-Signal Modeling and Parameter Optimization Design for Photovoltaic Virtual Synchronous Generator
摘要： With the continuous proliferation of renewable energy generation, distributed photovoltaic inverters operating at a maximum power point reduce the inertia of power systems, degrading system frequency stability and potentially causing severe oscillations in systems after being disturbed. The virtual synchronous generator (VSG) control method, which causes photovoltaic inverters to possess inertia and damping, now plays an important role in the field of distributed generation. However, while introducing the advantages of synchronous machines, problems with oscillations are also introduced and the stochastic fluctuation characteristic of photovoltaics results in the stochastic drifting of the operating point. This paper presents an adaptive controller parameter design method for a photovoltaic-VSG (PV-VSG) integrated power system. Firstly, a small-signal model of the PV-VSG is built and a state space model is deduced. Then, the small-signal stability and low frequency oscillation characteristics of the photovoltaic power generation system are analyzed. Finally, considering the limitations of system oscillations and the stochastic drifting of the operating point, a global optimization design method for controller parameters used to improve system stability is proposed. The time domain simulation shows that an optimized PV-VSG could provide sufficient damping in the case of photovoltaic power output changes across a wider range.
关键词： optimal design of parameters,eigenvalue analysis,virtual synchronous generator,photovoltaic inverter,small-signal modeling
更新于2025-09-16 10:30:52