Control method for full-hydraulic wind-tide hybrid power generator

Abstract

The invention discloses a control method for a full-hydraulic wind-tide hybrid power generator. The method comprises the following control modes that (1) electric pitch control is conducted, a reference voltage value at a rated wind speed is set in a fuzzy PID algorithm preset in a central control unit, a voltage signal of real-time wind speed fed back by an anemorumbometer is compared with the reference voltage value, whether electric pitch operation of pneumatic impellers needs to be conducted or not is decided, and a tide impeller adopts the same control method; (2) rotary speed signals of a first rotary speed torque sensor on a wind energy collector and a second rotary speed torque sensor on a tide energy collector and displacement signals of two variable pumps are input into the central control unit and handled through the fuzzy PID algorithm, and the opening degree of a flow divider is controlled according to the handling results; (3) best power tracking control is conducted; and (4) the hydraulic system pressure is adjusted and controlled. Through the method, control is flexible, the reliability is high, and the power generation efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of hybrid power generation control, and relates to a control method for fully hydraulic wind-tidal hybrid power generation equipment. Background technique [0002] Offshore wind power has the advantages of huge energy reserves, sustainable and stable resources, and low environmental impact. Compared with onshore wind power, it has the advantages of high wind speed, low wind shear, low turbulence, high output, and long service life. However, the complex and changeable operating conditions of offshore wind turbines, high mechanical failure rate, and expensive maintenance costs have become obstacles restricting the development of offshore wind power. [0003] Traditional wind turbines mainly include doubly-fed and direct-drive, but there are many problems in the structural characteristics, control methods and the matching of the two types of wind turbines. Compared with the traditional double-fed and direct-dr...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a control method for fully hydraulic wind-tidal hybrid power generation equipment, which solves the problems of complex and changeable operating conditions in the structural characteristics, control methods and the matching of the two in the prior art wind power generating set. High incidence of mechanical failures and high maintenance costs

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