Power-generating interconnected topological structure of transformerless water-turbine generator

Abstract

The invention relates to a power-generating interconnected topological structure of a transformerless water-turbine generator, which comprises a water-turbine generator set, a high-voltage rectifying topology, a direct-current bus and an inverting topology, wherein the high-voltage rectifying topology comprises a plurality of high-voltage rectifying modules, the inverting topology comprises a plurality of inverting modules, the high-voltage alternating current with any frequency generated by each water-turbine generator is rectified by the high-voltage rectifying topology to obtain a direct-current high voltage, the generated direct-current high voltages are connected together and collected onto the direct-current bus, the voltage on the direct-current bus is used as the direct-current side voltage of the inverting topology, and the direct-current side voltage is inverted into an alternating-current voltage by the inverting topology to generate a high voltage to be connected to a power grid. The invention has the advantages that: no transformer exists at an input end, thereby the equipment investment is saved, and the waterpower generation efficiency is greatly improved. The transformer does not exist at the input end, so that the volume of a waterpower-generating interconnected topology is reduced, the occupied land is reduced, the weight is lightened, and the cost is lowered; and meanwhile, the energy consumption can be lowered, so that the manufacturing process is simplified, and the production period is reduced.

Description

technical field [0001] The invention relates to hydroelectric power generation grid connection and high-power power electronic technology, in particular to a new topology structure of transformerless hydropower generation grid connection based on MMC modular multilevel inverter (Modular Multilevel Converter) and H bridge. Background technique [0002] my country's hydropower resources rank first in the world, and so far all the hydroelectric generators of hydropower stations use the same method of electricity collection. The electricity generated by the hydroturbine cannot be directly integrated into the grid. 50Hz power frequency can be incorporated into the power grid. In order to control the speed of the water turbine, excess water must be drained, and this power generation method causes huge waste. During the high water season, there is a large amount of water, and more electricity can be generated, but due to the limitation of the 50Hz power frequency of the turbine, th...

AI Technical Summary

Problems solved by technology

In order to control the speed of the water turbine, the excess water must be drained. This method of power generation causes huge waste

During the high water season, there is a large amount of water, and more electricity can be generated, but due to the limitation of the 50Hz power frequency of the turbine, the excess water cannot be effectively converted into electricity, and it is wasted in vain

In the dry season, the amount of water is small, which will cause the speed of the turbine to not reach 50Hz. At this time, electricity cannot be generated, and water resources will be wasted.

[0003] In addition, hydropower usually needs to be equipped with transformers on the input side, which leads to large equipment investment, large land occupation, high cost and long production cycle.

Images