Intelligent relay power supply device

Abstract

The invention relates to an intelligent relay power supply device, which includes a main control module and a boost compensation control unit, the boost compensation control unit includes an isolation transformer, an AC / DC module and a DC / AC module; the secondary side of the isolation transformer is used for connected in series to the main circuit of power transmission; the AC input terminal of the AC / DC module is used to connect to the main circuit of power transmission, and its DC output terminal is used to connect to the DC input terminal of the DC / AC module; the DC The AC output end of the / AC module is used to connect to the primary side of the isolation transformer; the main control module is suitable for controlling the AC output voltage of the DC / AC module. The technical solution of the invention solves the problem of long-distance transmission of low-voltage electricity, and can keep the low-voltage electricity basically stable at the rated voltage level during long-distance transmission. Reduced line power loss, energy saving and environmental protection.

Description

technical field [0001] The invention relates to the field of power electronic equipment technology and voltage long-distance transmission, in particular to an intelligent relay power supply device. Background technique [0002] Modern society is inseparable from electric energy. We usually use low-voltage electricity in our daily life and production places (AC 220V / 380V conventional places or special places below 50V). One of the characteristics of low-voltage electricity is that it is easy to lose and difficult to transmit. Therefore, in the national standard "Code for Planning and Design of Urban Distribution Network" (GB50613-2010), Article 5.8.5 and Article 7.1-f of "Technical Guidelines for Urban Distribution Network of China Southern Power Grid" both stipulate low-voltage (below 0.4kv) power supply The radius should not exceed 400m. The purpose of limiting the power supply distance is, on the one hand, to ensure the quality of the power supply at the end of the electr...

AI Technical Summary

Problems solved by technology

However, in real life and production places, electrical equipment is far away from the power point everywhere. Due to the long transmission line and the voltage at the end of the line is too low, it is not an exception that the electrical equipment is damaged or cannot work normally.

[0003] In order to solve the problem of low terminal voltage and reduce line loss, most users or power supply departments currently adopt the power supply and distribution scheme of increasing the cross-section of transmission cables or building medium-voltage (10KV or 35KV) substations and distribution stations. This will greatly increase the investment! The country invests hundreds of billions of RMB in power grid transformation and improvement of power grid transmission capacity every year, and a large part of the funds are used in the construction of medium-voltage (10KV or 35KV) substations and distribution stations and the replacement of large-section transmission lines.

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