Double-turbine direct-driven permanent magnet synchronous generator set

Abstract

The invention relates to the technical field of centripetal turbine low-grade heat energy power generation, in particular to a double-turbine direct-driven permanent magnet synchronous generator set. The double-turbine direct-driven permanent magnet synchronous generator set comprises a permanent magnet synchronous generator, a control system and centripetal turbines, wherein a cooling system is arranged on a shell of the permanent magnet synchronous generator; the cooling system comprises a cold water system arranged on the outer side of the shell and a cold air system communicating with the interior of the shell; the control system is used for controlling the displacement state of a rotating shaft of the permanent magnet synchronous generator; the two centripetal turbines are symmetrically arranged at the two ends of the permanent magnet synchronous generator; and a first communicating pipe is connected to an inlet of each centripetal turbine, and a second communicating pipe is connected to an outlet of each centripetal turbine. The double-turbine direct-driven permanent magnet synchronous generator set can effectively offset axial force borne by the generator set, the generator set is free of friction loss and high in motion precision in the operation process, the size of the generator set can be reduced by adopting a direct drive mode, cost is saved, and power generation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of centripetal turbine low-grade thermal ocean temperature difference energy power generation, in particular to a twin-turbine direct-drive permanent magnet synchronous generator set. Background technique [0002] Turbine generators are widely used in the field of low-grade thermal energy utilization power generation technology. For ocean temperature difference power generation, based on the principle of organic Rankine cycle power generation, the characteristics of low-boiling organic working fluid are used to make the liquid working medium in the evaporator by The surface temperature seawater is heated and turned into steam, which then drives the turbine to do work and drives the generator to generate electricity. After being condensed by the deep seawater in the condenser, it becomes a liquid working medium, which is pumped back to the evaporator to continue working, forming a cycle. However, for low-grad...

AI Technical Summary

Problems solved by technology

[0002] Turbine generators are widely used in the field of low-grade thermal energy utilization power generation technology. For ocean temperature difference power generation, based on the principle of organic Rankine cycle power generation, the characteristics of low-boiling organic working fluid are used to make the liquid working medium in the evaporator by The surface temperature seawater is heated and turned into steam, which then drives the turbine to do work and drives the generator to generate electricity. After being condensed by the deep seawater in the condenser, it becomes a liquid working medium, which is pumped back to the evaporator to continue working, forming a cycle. However, for low-grade thermal power generation such as ocean thermal energy, the radial turbine usually adopts a single turbine structure, and the generator is driven to generate electricity through a coupling. Not only is the power generation efficiency low, but the structure is large and not compact, which greatly increases Manufacturing cost. In order to improve the power generation efficiency of the turbine and improve the axial force and manufacturing cost of the single turbine structure, this patent uses a double-turbine direct-drive permanent magnet synchronous generator set. The turbines are arranged symmetrically and the axial The force offset not only solves the problem of axial force, but also solves the problem of high sealing performance due to the existence of axial force, and also improves the power generation efficiency. At the same time, the use of direct drive permanent magnet synchronous generator also makes the structure of the unit Compact, reduces manufacturing cost

Images