Method and device thereof for fault detection/protection for SVC system
A fault detection and protection system technology, applied in emergency protection circuit devices, measuring devices, measuring current/voltage, etc., can solve problems such as untimely protection, burning of main circuit and power devices, untimely protection of valve groups, etc., and achieve improvement Safe operation factor, automatic bus contention, effect of solving bus contention
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[0022] Below in conjunction with accompanying drawing, the present invention will be further described:
[0023] Such as figure 1 As shown, first, the signal acquisition unit samples and converts the system voltage and current signals through the AD sampling board, and then sends them to the DSP operation unit for calculation. The DSP operation unit calculates the instantaneous reactive power of the current grid according to the grid parameters, and sends a control signal to the Phase-shifting trigger board: The phase-shifting trigger board first forms a high-frequency pulse, and then converts the three-phase trigger signal through the photoelectric isolation circuit for electro-optical conversion, and then transmits it to the fault detection protection and trigger pulse drive unit through the optical fiber, and the unit passes the trigger pulse through After being driven, it is sent to the corresponding high-potential board to drive the three-phase thyristor valve group, and ...
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