2results about How to "Improve power supply security" patented technology

This utility model relates to the field of wind turbine generator box-type transformer technology, specifically to a high-voltage side power supply monitoring device for a box-type transformer based on a voltage transformer. The device includes: a first voltage side, a box-type transformer, a second voltage side, a UPS, a dual-power switching device, and a power consumption side connected in sequence. The first voltage side includes: a first voltage cable inlet and a first voltage switch connected in sequence, and a voltage transformer. The first voltage winding of the voltage transformer is connected to the first voltage cable inlet, the second voltage winding of the voltage transformer is connected to the dual-power switching device, and the first voltage switch is connected to one end of the box-type transformer. This utility model improves the power supply reliability of wind farms, achieves efficient automated management, quickly responds to faults, reduces safety hazards, ensures stable operation, and promotes the intelligent transformation of the wind power industry.

This invention provides a frequency-to-analog safety barrier, comprising a voltage conversion circuit, a transformer coil drive circuit, a transformer, a first AC voltage rectification and filtering circuit, a frequency signal processing circuit, a NAMUR signal processing circuit, an NPNPNP signal processing circuit, a frequency processing circuit, an MCU control circuit, a TTL output interface, an isolation chip, a square wave processing circuit, a filtering circuit, a DC output circuit, and an alarm relay. The voltage conversion circuit is connected to the transformer via the transformer coil drive circuit. The transformer supplies power to the hazardous and safe zones via the first AC voltage rectification and filtering circuit. Multiple intrinsically safe terminals in the hazardous zone are connected to the frequency processing circuit via three signal processing circuits. The frequency processing circuit outputs to the MCU control circuit. The MCU output sequentially passes through the TTL interface, the isolation chip, the square wave processing circuit, and the filtering circuit to the DC output circuit. This invention achieves frequency signal to analog quantity conversion and safety isolation, increasing system stability.