Distributed real-time control unit of wind power converter

Abstract

The invention discloses a distributed real-time control unit of a wind power converter. The distributed real-time control unit is characterized in that: a machine side sampling board, a network side sampling board and a DC (direct current) sampling board are mounted at a power loop sampling point nearby so as to realize nearby sampling; an analogue quantity is converted into a digital quantity by an AD (analogue / digital) converter and then transferred to a controller in a serial mode through an optical fiber while a hardware protection threshold value and control command information sent by the controller are received; a power control board mounted on a machine network side power unit receives a pulse signal sent by the controller, performs serial-parallel conversion and pulse protection treatment, and sends the signal to a power element to realize control of the converter; and meanwhile, the phase current and temperature signal of the power unit are sampled in real time and converted into a digital signal through the AD converter to be sent to the controller in a serial mode. Through the invention, the real-time performance and reliability of the system can be effectively improved, the cost is saved, the converter wiring is simplified, and relatively high generality and cuttability are realized.

Description

technical field [0001] The patent of the invention belongs to the technical field of new energy power generation, and is applicable to power electronic converters for wind power generation. Background technique [0002] At present, wind power converter, as the core component of doubly-fed and direct-drive wind turbine grid-connected control, plays an increasingly important role in the development of new energy, and its control performance directly determines the grid-connected characteristics of wind turbines . [0003] The real-time control unit of the wind power converter is one of the most critical links in the control of the wind power converter, which is directly related to the control quality and system reliability of the wind power converter. Its main functions include grid-connected control on the grid side and generator control on the motor side. By detecting the voltage and current signals on the grid side of the wind power converter and calculating through a seri...

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Problems solved by technology

[0005] At present, this solution has been put into commercial application and has entered the mass production stage, but the system uses two sets of controllers, which are costly and low in reliability. At the same time, the system uses centralized sampling and pulse parallel output, which requires a lot of hard wiring To realize the input of analog sampling signal and the output of pulse signal, a large number of hard-wired wires pass through the strong electric signal inside the converter for long-distance transmission, which is susceptible to interference, complex wiring, and low reliability

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