Pitch change control system for tidal current energy generator set

Abstract

The invention provides a pitch change control system for a tidal current energy generator set. The pitch change control system comprises at least two pitch change control units connected in parallel;each pitch change control unit mutually independently controls a corresponding permanent magnet synchronous motor, and correspondingly receives an instruction from an external tidal current energy generator set main control device and executes the corresponding pitch change operation according to the corresponding instruction; an Ethernet switch is arranged in one of the pitch change control units, the Ethernet switch can be in communication with the tidal current energy generator set main control device, and the other pitch change control units are connected to the Ethernet switch in a communication mode. According to the pitch change control system, the pitch change system can undergo control program upgrading, fault diagnosis, resetting and other remote maintenance under the conditionthat the generator set is not lifted beyond the water surface, a lot of workload and fault shutdown time of the operation that the generator set is lifted beyond the water surface are avoided; a pitchchange action in a large range from 0 degree to 90 degrees and 180 degrees to 270 degrees is achieved, and then the generator set can generate electricity during a flood phase and an ebb phase; and the independent pitch change is realized, and the influence of the tower shadow effect is reduced.

Description

technical field [0001] The invention belongs to the technical field of ocean tidal current energy power generation, and in particular relates to a pitch control system of a horizontal axis tidal current energy generating set. Background technique [0002] Ocean tidal current energy resources are one of the renewable clean energy resources, which are abundant near the coastal islands of our country. As the installed capacity of tidal current energy generators increases from small to large, and the small blades gradually develop to large blades, it is difficult for the fixed pitch system to meet the control requirements of tidal current energy generators. [0003] The pitch system of the tidal current energy generating set is a servo drive system installed in the hub of the tidal energy generating set. It changes the angular distance of the blades by receiving the position command from the main control of the unit, so that the impeller can better capture the kinetic energy of ...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the hub space of the tidal current energy generating set is usually small, and the pitching mechanism applied to the horizontal axis tidal energy generating set is only a hydraulic type pitching system, that is, a hydraulic motor is used as the driving mechanism, and the actuator includes multiple gears, gears, etc. shaft, worm, etc., the mechanical transmission structure is complex, and there are the following problems: ①The hydraulic oil pipeline is prone to leakage; high

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