Control strategy for balancing capacitor voltage of modular multilevel converter

Ma, Shang; Wáng, Yì; Lv, Jian; Yu, Guolong

doi:10.1109/icems.2014.7013904

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…The fluctuation of the upper and lower capacitors voltage in Fig. 13 is less than 3 V, which is considerably less than that reported in [35]. This demonstrates the effectiveness and accuracy of the proposed MPC based tomatically.…”

Section: Simulation Resultsmentioning

confidence: 49%

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Novel Control of a Modular Multilevel Converter for Photovoltaic Applications

Shadlu¹

2017

Transactions on Electrical and Electronic Materials

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The number of applications of solar photovoltaic (PV) systems in power generation grids has increased in the last decade because of their ability to generate efficient and reliable power in a variety of low installation in domestic applications. Various PV converter topologies have therefore emerged, among which the modular multilevel converter (MMC) is very attractive due to its modularity and transformerless features. The modeling and control of the MMC has become an interesting issue due to the extremely large expansion of PV power plants at the residential scale and due to the power quality requirement of this application. This paper proposes a novel control method of MMC which is used to directly integrate the photovoltaic arrays with the power grid. Traditionally, a closed loop control has been used, although circulating current control and capacitors voltage balancing in each individual leg have remained unsolved problem. In this paper, the integration of model predictive control (MPC) and traditional closed loop control is proposed to control the MMC structure in a PV grid tied mode. Simulation results demonstrate the efficiency and effectiveness of the proposed control model.

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Section: Simulation Resultsmentioning

confidence: 49%

“…9, the three-phase circulating currents have smaller amplitude compared to the obtained results in [35] by using the proposed MPC controller. Accordingly, pure sinusoidal upper and lower currents are attained in each arm after activating MPC, as shown in Figs.…”

Section: Simulation Resultsmentioning

confidence: 85%