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This paper presents sliding mode pulse width modulation (SMPWM) control methodologies for a currentcontrolled inverter. Discussion begins with circuit analysis, proper references, and design of sliding surfaces. Based on this formulation, two novel approaches adopt sliding mode concept are proposed to make the system tracking selected references. Three-phase currents and the neutral point voltage are controlled simultaneously. Optimization of different operational criteria is offered by SMPWM via the control of neutral point voltage. Simulations are carried out to confirm the effectiveness of proposed control algorithms.

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In order to effectively reduce line loss, this paper analyzes the impact of AVC reactive power optimization in high proportion new energy areas on line loss under typical mode, and calculates the impact of new energy output on line loss when net load changes, and summarizes the law of AVC reactive power optimization in high proportion new energy areas and the impact of new energy output changes on power grid line loss. The research results show that the line loss rate of the main grid and the line loss rate of each partial voltage tend to decrease in the three modes of new energy generation, small generation and zero generation.