Improved off-grid Stirling power supply system structure and control method
A power supply system and improved technology, applied in AC network circuits, current collectors, electric vehicles, etc., can solve problems such as system sudden stop, ineffective supplementary reactive power, etc., to ensure stability, realize off-grid operation, and ensure power supply quality. Effect
Pending Publication Date: 2017-11-24
DALIAN GREAT OCEAN NEW ENERGY DEV
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Problems solved by technology
However, during the actual operation of the system, when the bidirectional DC / DC converter is in the step-down state, it cannot effectively supplement the reactive power required by the generator. When the system changes from the boost state to the step-down state, the system suddenly stops
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[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0039] like figure 1Shown is an improved off-grid Stirling power supply system structure, including: Stirling engine system; connected to the Stirling engine system, used to exchange the output of the Stirling engine system when the Stirling engine starts A bidirectional PWM inverter that performs DC inversion of electric energy and receives the ...
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The invention discloses an improved off-grid Stirling power supply system structure and a control method. The system structure comprises a Stirling engine system, a bidirectional PWM inverter, a user side inverter, a direct-current bus voltage detection unit and a controller; the bidirectional PWM inverter is connected to the Stirling engine system; the user side inverter is connected to the bidirectional PWM inverter and a storage battery; the controller is used for controlling the working state of the bidirectional PWM inverter and the working state of the user side inverter according to the direct current bus voltage collected by the direct-current bus voltage detection unit. According to the improved off-grid Stirling power supply system structure and the control method, self-starting of a Stirling engine can be achieved, a reactive channel is provided for running of a three-phase asynchronous motor at the same time, the balance of the electric energy among the asynchronous motor, a user and the storage battery can be achieved, and therefore off-grid running of the Stirling engine is achieved; the power supply of the system is stable, the situation that the system runs unstably is relieved, and the popularization capability of the Stirling engine system is further improved.
Description
technical field [0001] The invention relates to a Stirling power supply system, in particular to an improved off-grid Stirling power supply system structure and control method. Background technique [0002] Due to the characteristics of abundant, clean and widely distributed resources, solar energy and wind energy have become more and more widely used, and the research and application of clean energy power supply systems will become the forefront of future energy industry development. [0003] The existing off-grid wind power supply system generally uses a permanent magnet synchronous generator or a brushless excitation synchronous generator because it does not involve the electric start-up of the generator. The conventional structure of the system includes a wind turbine, a rectifier, an inverter, a storage battery, an unloader, etc. The wind turbine is connected to the inverter and the battery through the rectifier, the inverter is connected to the user, and the battery is...
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IPC IPC(8): H02J3/00H02J3/18H02J7/00
CPCH02J3/00H02J3/18H02J7/0036Y02E40/30
Inventor 李洪侠张彦明
Owner DALIAN GREAT OCEAN NEW ENERGY DEV