KEYWORDS: Photovoltaics, Monte Carlo methods, Solar cells, Solar energy, Solar radiation models, Solar radiation, Signal intensity, Technetium, Tantalum, Sustainability
Photovoltaic (PV) hosting capacity is challenged when PV access to distribution network on a large scale. Under different operation modes, PV hosting capacity is different. In this paper, the historical data of PV and load are analyzed, and the typical operation mode is extracted by k-means clustering method. Then Monte Carlo sampling method is used to extract different PV configuration scenarios. The PV hosting capacity under different operation modes is analyzed through forward and back generation power flow calculation.
Under the current background, a high proportion of distributed photovoltaic is widely connected to the low-voltage distribution network, which poses a challenge to the safety and stability of the distribution network. In order to accurately evaluate the photovoltaic hosting capacity of low-voltage distribution network with high proportion of distributed photovoltaic, a distributed photovoltaic hosting mathematical model is established and solved by Particle Swarm Optimization (PSO). In addition, the control strategy based on photovoltaic inverter is used to improve the hosting capacity, and a simulation analysis is carried out with an actual area of Shandong Province to verify the effectiveness of the proposed strategy.
KEYWORDS: Control systems, Process control, Telecommunications, Inductance, Voltage controlled current source, Systems modeling, Switches, Resistance, Electronics engineering, Bridges
Research on distribution network including VSC-connected distributed generation control has arouse more consideration due to the application of DC distributed generation. In this paper, a hierarchical economical MPC control strategy for VSCconnected DG is proposed to realize the efficient and economical control for VSC-AC system. Firstly, the dynamic characteristic of VSC-DG system is analyzed, and the time domain model for this system is established; secondly, the lower layer of overall control strategy is established, which utilizes MPC scheme to realize the track of power to reference value efficiently; then, a consensus protocol is established in upper layer to seek the power reference value for lower layer, realizing the economical distribution of active power; finally, simulation result of hybrid network model verifies the effectiveness of proposed control strategy.
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