Far-end power supply voltage compensation system and method

Abstract

The invention provides a far-end power supply voltage compensation system which comprises a bidirectional topology direct-current converter, a switch Q3 based on an MOSFET, a cable line, a line temperature acquisition module and a DSP control unit. The output end of the bidirectional topology DC converter is connected to the input end of the MOSFET-based switch Q3. The output end of the MOSFET-based switch Q3 is connected with one end of the cable line, the other end of the cable line is connected with a remote load, the line temperature acquisition module is embedded in an insulating layer ofthe cable line, and the output end of the line temperature acquisition module is connected with the DSP control unit. The invention further provides a far-end power supply voltage compensation method. The system and the method have the advantages that two extra voltage detection circuits and signal conditioning circuits thereof are not needed, the voltage compensation of the load end can be achieved through voltage compensation according to load current and circuit impedance parameters, and the system and the method are convenient to apply to a long-distance direct-current power supply system.

Description

Technical field[0001]The invention relates to a voltage compensation system, in particular to a remote power supply voltage compensation system and method.Background technique[0002]In the application of remote high-power DC power supply, as the load increases, the current flowing through the cable increases. On cables over a few hundred meters, the voltage drop from the output side of the power supply to the remote load will increase due to the line impedance. Will increase significantly. If the impedance voltage drop of this line is not compensated and controlled, the power supply voltage range of the load may exceed the working area, causing the equipment to stop working or damage the equipment.[0003]At present, the existing technical solution is to collect the voltage of the correction point, and the differential circuit collects the voltage of the remote device as the feedback input voltage of the controller, thereby controlling the voltage output of the DC voltage source accord...

AI Technical Summary

Problems solved by technology

This is effective for scenarios within a range of several meters, but for power supply ranges of hundreds of meters or even longer, this solution requires two additional sampling lines, resulting in difficult wiring and increased costs

[0004] In addition, ordinary DC sources work in one direction. When the load is switched from heavy load to light load, due to the inhibition of long line impedance, it is difficult to restore the high voltage output on the load side to the normal range in a short time, resulting in overvoltage of the equipment and serious damage to equipment

Images