A control and protection system for low-voltage ride-through test device of fan
A low-voltage ride-through and testing device technology, applied in measuring devices, measuring electricity, measuring electrical variables, etc., can solve problems such as poor real-time performance, complicated wiring methods and calculations, achieve a high degree of automation, improve reliability and real-time performance, and improve The effect of data transmission efficiency
Active Publication Date: 2017-01-11
STATE GRID CORP OF CHINA +2
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Problems solved by technology
[0004] In order to overcome the disadvantages of poor real-time performance of wave recording and complicated calculation of wiring methods, the present invention provides a control and protection system for low-voltage ride-through test devices of wind turbines. Clear, strong anti-interference, powerful protection functions, etc.
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[0030] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0031] Such as figure 1 , the present invention provides a control and protection system for a low voltage ride-through test device for wind turbines, the system includes a measurement unit, an IO unit, a logic control unit, a protection unit, a wave recording unit, a communication protocol conversion unit, a human-computer interaction unit, wave recording analysis unit; the measurement unit transmits digital signals to the logic control unit and the protection unit through the data bus, and the IO unit performs data interaction with the logic control unit and the protection unit respectively through the CAN bus, and the logic control unit Send the interrupt signal to the wave recording unit, the protection unit communicates with the communication protocol conversion unit through the CAN bus, the communication protocol conversion unit performs protocol conver...
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The invention provides a control and protection system used for a fan low-voltage ride-through testing device. The control and protection system comprises a measuring unit, an IO unit, a logic control unit, a protection unit, a wave recording unit, a communication protocol conversion unit, a man-machine interaction unit and a wave recording analysis unit. The measuring unit transmits digital signals to the logic control unit and the protection unit through a data bus, the IO unit conducts data interaction with the logic control unit and the protection unit through CAN buses, the logic control unit transmits interrupt signals to the wave recording unit, the protection unit is communicated with the communication protocol conversion unit through a CAN bus, and the communication protocol conversion unit conducts protocol conversion to complete data interaction with the man-machine interaction unit. The control and protection system used for the fan low-voltage ride-through testing device has the advantages of being friendly in man-machine interaction, high in automation degree, stable, reliable, clear in structure, high in anti-interference performance, powerful in protection function and the like.
Description
technical field [0001] The invention relates to a control and protection system, in particular to a control and protection system for a fan low-voltage ride-through test device. Background technique [0002] As a clean energy source, wind power is currently taking an increasing proportion of electric energy, and the impact of wind power systems on the power grid cannot be ignored. Especially when connecting to the power grid in a large-scale centralized way, when the power grid fails and the voltage of the grid-connected point drops, once the wind turbine automatically disconnects from the grid, it may cause the collapse of the grid voltage and frequency, which will seriously affect the safe and stable operation of the grid. The application of wind power, a clean energy source, is limited. Therefore, large-scale grid-connected wind turbines must have low voltage ride through capability (Low Voltage Ride Through, LVRT). The grid connection of wind turbines must meet the cor...
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IPC IPC(8): G01R31/00
Inventor 刘伟于永军崔大伟王俊永毕胜周亚娟
Owner STATE GRID CORP OF CHINA