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[IEEE 2018 China International Conference on Electricity Distribution (CICED) - Tianjin (2018.9.17-2018.9.19)] 2018 China International Conference on Electricity Distribution (CICED) - PhotovoltaicVirtual Synchronous Generator Engineering Application Effects Analysis and Optimization
摘要： Firstly, this paper analyzed in theory two kinds of frequency regulation control strategies, swing equation control strategy and additional frequency regulation characteristics control strategy, which were adopted by the demonstration project. The differences between two strategies in frequency modulation start-up time, oscillation risk, mode of supporting power, inertia response dead zone and so on were compared and studied. Then, relying on the recorded field data, paper showed the actual frequency modulation effect and characteristics of differences between the two strategies. Lastly, we optimized the VSG control strategies and proposed two new ones to make full ues of the available power of PV-VSG and coordination of photovoltaic and energy storage effectively to stable the grid frequency. The effectiveness of new control strategies was verified on a RT-LAB semi-physical simulation platform. This work is supported by science and technology project of the headquarter of State Grid Corporation of China.
关键词： Control Strategies Optimization,Hardware-in-the-loop Simulation,Energy Storage Unit,Demonstration Projects,primary frequency Regulation,Photovoltaic Virtual Synchronous Generators(PV-VSG),Virtual Inertia
更新于2025-09-19 17:13:59
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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) - Single-stage Grid-connected Photovoltaic Generation Takes Part in Grid Frequency Regulation for Electromechanical Transient Analysis
摘要： In order to solve the problem of insufficient frequency regulation capacity caused by the large-scale grid-connected photovoltaic (PV) generation, the active power-frequency droop control strategy and virtual inertia control strategy are proposed for electromechanical transient analysis. By modifying the control structure of the inverter, PV generation actively got involved in frequency regulation. The simulation results indicate that: the inverter can control the PV array to increase or decrease the active power generated according to the set droop control and virtual inertia control, so as to suppress the drop or rise of the grid frequency; in the dynamic process of frequency, the incremental power of PV generation induced by the dynamic action of the voltage vector of grid connection point is dependent on its virtual inertia control.
关键词： virtual inertia control strategy,frequency regulation,grid-side inverter,single-stage grid-connected photovoltaic generation,droop control strategy
更新于2025-09-12 10:27:22
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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) - Generation Planning Model Including Frequency Stability Constrains to Mitigate Large-Scale Integration of Photovoltaic Plants
摘要： In the last two decades, electricity systems have undergone structural changes due to the incorporation of large- scale variable generation technologies (VGTs). Some of the VGT such as photovoltaics (PV) and wind power produces undesirable effects in the system. In power systems, synchronous generators are the primary sources of inertia. During power imbalance, the inertia of the generators prevents frequency stability issues. The VGTs do not naturally provide inertia, so when their participation in the production matrix is high; the system loses robustness since the inertia is decreased. This paper proposes a generator-planning model that includes the effects of lower inertia due to the increase of VGTs. The objective is to obtain a limited frequency deviation during contingencies. The proposed model adds restrictions related to the frequency variation to the capacity of the units that are in fault. The simulations show that to comply with the specified frequency deviations, the model must oversize the park in the order of 13 % in small meshed systems, while in real size systems the oversize is in the order of 1 %.
关键词： Frequency regulation,inertial response,renewable energy sources,power generation planning
更新于2025-09-11 14:15:04