ISSN 1674-0629
CN 44-1643/TK
CN 44-1643/TK
Spatial-Temporal Coordinated Optimization Method of Low Voltage Hybrid AC/DC Distribution Network for Accommodation of High-Proportion PVs
Yu FU , Hao BAI , Yue LI , Zhiyong YUAN , Xiaomeng HE , Congcong WU , Zhufeng WANG , Jin XU
›› 2023, Vol. 17 ›› Issue (1) : 84 -93.
Spatial-Temporal Coordinated Optimization Method of Low Voltage Hybrid AC/DC Distribution Network for Accommodation of High-Proportion PVs
With the proposed carbon-neutral target, the integration of large-scale distributed photovoltaics (PVs) to distribution network has become an inevitable trend. However, the integration of PVs aggravates the voltage violation, three-phase unbalance and reverse power of low voltage distribution network, which brings great challenges to the stable operation of the distribution network. In view of the accommodation problem of high-proportion PVs, this paper fully taps the power regulation potential of low voltage hybrid AC/DC distribution network and energy storage, and a spatial-temporal coordinated optimization method based on voltage source converter (VSC) and energy storage is proposed. Firstly, the power transfer characteristics of VSC and energy storage at the spatial and temporal levels are analyzed. Secondly, a spatial-temporal coordinated optimization model of low voltage hybrid AC/DC distribution network is established with the objective of minimizing the PV curtailment and power losses, and the power of energy storage and VSC are optimization variables. The proposed model is transformed into a second-order cone programming model to solve. Finally, taking the typical low voltage hybrid AC/DC distribution network as an example, the simulation results show that the proposed method can effectively improve the voltage and reverse power problems caused by PVs, and enhance the PV accommodation capability of low voltage distribution network.
low voltage distribution network / second-order cone optimization / energy storage / voltage source converter / PV accommodation / hybrid AC/DC
the Guizhou Provincial Science and Technology Support Plan([2022]012)
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