Cascaded SVG serial-parallel cooperative communication controller

Abstract

The invention discloses a cascaded SVG serial-parallel cooperative communication controller, and aims to enhance the ability of a serial fiber channel between power units in resisting high-frequency signal interference, so as to facilitate fast detection and location of a failure fiber. The cascaded SVG serial-parallel cooperative communication controller is provided with a main controller and cascaded power units, wherein the main controller is provided with a main control plug-in and a fiber plug-in which are connected; the main control plug-in is connected with the cascaded power units through a serial fiber communication link; and the fiber plug-in is connected with the cascaded power units through a transceiving fiber link. Compared with the prior art, in the invention, by adopting serial and parallel transceiving links, the serial and parallel fiber communication links can be monitored quickly and visually, the ability of the serial fiber channel between the power units in resisting high-frequency signal interference is enhanced, the failure link and the power unit can be accurately judged and located, and the failure fiber is quickly detected and located; and meanwhile, thetime delay in control is little, the accuracy is high, and the fault tolerance is enhanced.

Description

technical field [0001] The invention relates to a power electronic controller, in particular to a SVG serial and parallel coordinated controller. Background technique [0002] With the utilization of various new energy sources such as photovoltaics and wind power connected to the grid, various supporting power electronic devices are more and more widely used. However, the application of power electronic devices also brings a series of problems, such as low power factor, current lags behind voltage during operation, and consumes a large amount of reactive power. If the reactive power capacity of the grid is insufficient, the reduction of network power factor and voltage will make electrical equipment not fully utilized, reduce the transmission capacity of grid power, and cause increased losses, seriously affecting the power supply quality of the grid. In order to improve the power factor and power supply quality of the power grid and reduce the loss of power supply lines, th...

AI Technical Summary

Problems solved by technology

However, on the one hand, the serial optical fiber communication link transmission level signal between the cascaded high-voltage SVG devices of the cascaded high-voltage SVG device is easily interfered by the high-frequency signal in the power switching device or the primary circuit; on the other hand, due to the cascaded The fiber optic communication channels between power units are complex and numerous, which can easily lead to failure of fiber optic communication, making it difficult to locate faults, and difficult to effectively and quickly troubleshoot and monitor them

Therefore, it poses a challenge to the stable control of cascaded SVG devices

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