Coordinated Control Policy of New Energy Power System Considering Demand Side Characteristics

Chen, Yi; Wei, Wu; Bai, Jinyang; Zhang, Xanjie; Zongshuai, Ouyang; Fan, Youping

doi:10.1109/imcec46724.2019.8983834

Cited by 1 publication

(1 citation statement)

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“…Currently, vigorously developing renewable energy has become the core direction of energy upgrading in all countries in the world, and the electric energy Internet, which uses electric energy as the energy transmission carrier, has received extensive attention from academic and industrial circles (Al Haj Hassan et al, 2015;Chen et al, 2019). Due to the complexity of various energy sources in many local area grids, it is difficult for traditional converters to cope with and effectively control large-scale distributed energy access.…”

Section: Introductionmentioning

confidence: 99%

A centralized local energy storage modular multilevel converter

Xiao²,

Jiang³

et al. 2022

Front. Energy Res.

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The energy storage modular multilevel converter (MMC-ES) has been widely studied for its excellent performance in solving the problems of power difference, voltage fluctuation and effective improvement of power quality in the grid caused by the integration of new energy caused by new energy grid connection. Aiming at the problems that energy storage units of the traditional distributed MMC-ES are scattered, inconvenient to assemble and maintain, complex system control, and the traditional centralized MMC-ES has poor capacity selection flexibility, in this paper, a centralized local energy storage modular multilevel converter (MMC-CLES) between the distributed MMC-ES and the centralized MMC-ES is proposed. On the premise of not affecting the advantages of MMC-ES, by reducing the number of energy storage units, the switching loss is reduced, and the problems of complex SOC (state of charge) balance control strategy, large power conversion system loss, the AC side current imbalance caused by the grid connection of new energy sources and high system cost caused by too many energy storage units are solved. Matlab/simulink simulation shows that compared with traditional distributed MMC-ES, MMC-CLES reduces a total of 52 power devices, and under the condition of three-phase voltage unbalance, MMC-CLES effectively suppresses power fluctuations, the SOC balance control and the fast balance of the three-phase current are realized. The unbalance degree of the three-phase current is 8.16%, and the total harmonic distortion rate of the current is 3.11%.

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Section: Introductionmentioning

confidence: 99%