A hydraulic transmission system for variable load and differential regulation of wave energy power generation

Abstract

The invention discloses a hydraulic transmission system for change load deviating-regulation wave power generation. The hydraulic transmission system comprises a hydraulic conversion device and a control system, wherein the hydraulic conversion system is composed of a reversing loop, a pressurization loop, a protection loop and a voltage-stabilizing and speed-regulating loop. The system is mainly composed of a double-rod piston hydraulic cylinder, a single-rod piston hydraulic cylinder, a two-position three-way servo valve, an energy accumulator, a speed regulating valve, an overflow valve, a one-way valve, an oil supplementing tank and a hydraulic motor. The undulating energy of waves drives the double-rod piston hydraulic cylinder to move in a reciprocating mode through a wave energy capturing system, the energy accumulator absorbs pressure pulse in a pipeline and stores the energy in a compressed air mode, a speed regulating control system can adjust the size of a throttling opening of the speed regulating valve according to load change deviation, the rotating speed can be within the allowed control range, and the rotating speed of the hydraulic motor is driven to keep unchanged, so that electric energy constant in frequency is generated. The hydraulic transmission system is small in size, high in reliability and good in continuity; the quality of the electric energy can be ensured under the circumstance of load change by means of operation of multi-body networking.

Description

technical field [0001] The invention belongs to the technical field of ocean energy utilization, and relates to a hydraulic transmission system of a wave energy power generation energy conversion device, in particular to a hydraulic transmission system for adjusting wave power generation with variable load difference. Background technique [0002] As a clean and renewable energy, ocean energy has huge and inexhaustible reserves. Because of the long distances, poor reliability and high cost of laying cables on the seabed, it is difficult to transmit power to offshore islands. Ocean energy power generation technology can meet the needs of military facilities on islands, residential electricity and ship navigation nearby. Hydraulic transmission technology is applied to wave energy generation, which can convert unstable wave energy into stable mechanical energy to drive generators to generate electricity. It is cheap, compact, and highly reliable. [0003] At present, the vast...

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Problems solved by technology

Although the above-mentioned hydraulic transmission device uses an accumulator to adjust the pressure in the hydraulic system to ensure that the hydraulic motor speed is constant near the design working condition, it is unavoidable that when the generator is connected to the variable load, along with When the load changes, the hydraulic motor speed will be greatly affected, which will affect the power quality

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