Tidal energy control system and control method thereof

Abstract

The invention discloses a tidal energy control system, which comprises a tidal energy power generation device, a hardware circuit topology and a control module, and is characterized in that the hardware circuit topology comprises an uncontrolled rectification circuit and a Boost converter circuit, and the Boost converter circuit is connected in parallel with a hybrid semiconductor parallel device; the control module comprises a variable step frequency adaptive filtering controller, a maximum power tracking controller and a high-performance prediction controller. Maximum power point capturing of output power is achieved through a self-adaptive maximum power control strategy, and meanwhile smooth processing is conducted on tidal energy output power on the premise that power is not lost too much; the high-efficiency, low-harmonic-content and high-power-factor operation of the power converter is realized by establishing a cost function containing device loss, harmonic content and power factors through a high-performance predictive control method. Therefore, the tidal power generation device can meet high-performance and high-stability power supply requirements in the island, coast or offshore power generation process.

Description

technical field [0001] The invention relates to the technical field of power generation, in particular to a tidal energy control system and a control method thereof. Background technique [0002] With the continuous improvement of power quality requirements for tidal energy tidal energy power generation devices in the process of power generation on islands, coasts or offshore, high performance and high stable power supply requirements have become the development trend of tidal energy power generation devices. Achieving this goal requires a higher-performance control strategy. The application of the traditional maximum power tracking strategy in photovoltaic and wind power generation has matured. However, due to the particularity of the marine environment, the change of the current speed will cause the power of the turbine to fluctuate greatly. The expansion effect is the current speed change. main reason. As disclosed in the prior patent technical document CN201410622989.X...

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Problems solved by technology

However, the existing patent technical document CN202111024969.9 discloses a fractional-order virtual inertia predictive control battery test DC microgrid voltage stabilization method, and the patent technical document CN201810018676.1 discloses an adaptive step-size photovoltaic maximum power tracking method based on conductance increments and systems, but there is no comprehensive analysis and research on the application of the composite control of adaptive filter maximum power tracking and fractional model predictive control in tidal energy tidal energy generation devices

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