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Traditional parallel inverters control methods, i.e. the master-slave control and peer to peer control method cannot meet the demand of control of micro-grid because of their shortcomings. The Combined Control Method for Parallel Inverters Control of Micro-grid has been proposed in this paper, which includes PQ control and active power-voltage control combined with droop control scheme. Then, voltage...
The PSCAD simulation model of Yindong HVDC system is established based on the actual parameters. Establish AC equivalent (Shandong power grid) model of inverter side using a suitable method for electromagnetic transient simulation, set up different types of faults to Shandong power grid, including unbalanced fault (ground fault) and symmetric faults (three-phase short-circuit fault), research and...
This paper presents an analytical calculation of the average and RMS currents in three-level NPC inverter. Assuming that the load current is sinusoidal, the conduction duty ratio functions of power semiconductor are analyzed on the basis of the circuit structure and the switch operation in 3-level NPC SPWM inverter with the clear physics means. The conception average and RMS of discontinuous current...
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