Control and protection system used for fan low-voltage ride-through testing device
A low-voltage ride-through and testing device technology, which is applied to measuring devices, measuring electricity, and measuring electrical variables, etc., can solve problems such as computational responsibility and poor real-time performance, and achieve a high degree of automation, improve real-time performance, improve reliability and real-time performance Effect
Active Publication Date: 2014-09-17
STATE GRID CORP OF CHINA +2
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Problems solved by technology
[0004] In order to overcome the shortcomings of poor real-time performance of wave recording and responsible 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 further described in detail below in conjunction with the drawings.
[0031] Such as figure 1 , The present invention provides a control and protection system for a wind turbine low voltage ride through test device. 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, Recording analysis unit; the measurement unit transmits digital signals to the logic control unit and the protection unit through a data bus, the IO unit performs data interaction with the logic control unit and the protection unit through the CAN bus, and the logic control unit Send an interrupt signal to the wave recording unit, the protection unit communicates with the communication protocol conversion unit via the CAN bus, the communication protocol conversion unit performs protocol conversion to complete the data interaction with the huma...
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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 protection system, in particular to a control protection system used for a wind turbine low voltage ride through test device. Background technique [0002] As a kind of clean energy, wind power generation currently accounts for an increasing proportion of electric energy, and the impact of wind power generation systems on the grid cannot be ignored. Especially when a large-scale centralized connection is used to connect to the grid, when the grid fails and the grid-connected point voltage drops, once the wind turbines are automatically disconnected from the grid, the grid voltage and frequency may collapse, which will seriously affect the safe and stable operation of the grid. The application of clean energy such as wind power is limited. Therefore, large-scale grid-connected wind turbines must have Low Voltage Ride Through (LVRT). The grid connection of wind turbines must meet the corresponding technical standards. Only...
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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