Direct current voltage division method and device based on binary resistance network

By dynamically controlling the binary resistor network, a wide-range adjustable and high-precision passive voltage divider for a 1500V DC system was achieved, solving the problems of insufficient voltage coverage and accuracy degradation in existing technologies, reducing costs and improving measurement accuracy.

CN122111168APending Publication Date: 2026-05-29CHINA ELECTRIC POWER RESEARCH INSTITUTE CO LTD +1
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
CHINA ELECTRIC POWER RESEARCH INSTITUTE CO LTD
Filing Date
2026-01-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing DC voltage dividers have problems such as insufficient voltage coverage, inability to achieve arbitrary integer ratios for fixed voltage division ratios in 1500V DC systems, degraded accuracy, and low application efficiency, and cannot meet the requirements for wide-range adjustable and high-precision passive voltage division.

Method used

By employing a binary resistor network-based method, and through multiple resistors, switch arrays, and voltage divider connection arrays, the combination of switches and connections is dynamically controlled to achieve high-precision voltage division with arbitrary integer ratios, including voltage division ratios from 1:1 to 1535:1.

Benefits of technology

It achieves wide-range adjustable and high-precision passive voltage divider for 1500V DC systems, supports real-time monitoring of 1500V voltage, reduces costs and improves measurement accuracy, and avoids electromagnetic interference and the need for hardware replacement.

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Abstract

The application provides a direct current voltage division method and device based on a binary resistance network. The binary resistance network comprises a plurality of resistors, a switch array and a voltage division connection terminal array. The method comprises the following steps: obtaining a target voltage division ratio; determining the identification of at least one switch in the switch array that should be closed and the identification of a target voltage division connection terminal in the voltage division connection terminal array that should be connected with a voltage division output terminal based on the target voltage division ratio; the initial state of each switch in the switch array is open, and each voltage division connection terminal in the voltage division connection terminal array is not connected with the voltage division output terminal in the initial state; controlling the at least one switch to be closed by using the identification of the at least one switch, and controlling the target voltage division connection terminal to be connected with the voltage division output terminal by using the identification of the target voltage division connection terminal; and the voltage output by the voltage division output terminal is a voltage after voltage division. The 1500V direct current system can realize the function of wide-range adjustable, high-precision passive voltage division.
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