Active power filter based on DTU (Data Transfer Unit) data transfer system

Abstract

The invention relates to an active power filter based on a DTU (Data Transfer Unit) data transmission system, which comprises an external current sampling transformer, a power grid main circuit or a user power utilization system, an active power filter module and a DTU system, and is characterized in that the active power filter module is formed by electrically connecting a main controller, a 458 communication module, an internal current sampling unit and a main circuit driving module, and the active power filter module is electrically connected with a DTU module; the DTU system is formed by electrically connecting the DTU module, an operator GPRS or wireless network to data center monitoring server and a system or centralized control room used by terminal users such as configuration software, APP or web pages. Data information of the active power filter provided is wirelessly transmitted to a monitoring center through a GPRS DTU, the upload is not required to be monitored through a dynamic environment host, and thus the maintenance cost is reduced.

Description

technical field [0001] The invention relates to the technical field of power electronic equipment data transmission and background monitoring, in particular to an active power filter based on a DTU data transmission system. Background technique [0002] Data transmission unit: DTU English name is Data Transfer Unit, referred to as DTU, is a wireless communication terminal equipment for serial port data and IP data conversion, which can be transmitted through gprs, cdma, 3g wireless network. According to the classification of transmission network, there are mainly the following types: 1. gprs dtu, using gprs 2G module, also called gprs wireless module, gprs transmission module, wireless transmission module, 2. CDMA DUT, mainly using CDMA network transmission; 3.3G DUT, mainly Use 3G network transmission. [0003] Active power filter module: The active power filter module is referred to as APF, and the full English name is Active PowerFilter. Level structure; according to th...

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Problems solved by technology

[0004] APF is mainly used in the secondary measurement of the transformer in the power distribution room to eliminate the harmonics generated by the nonlinear load and ensure that the distorted current will not flow back to the main grid, thus ensuring the good power quality characteristics of the main grid; The routine inspection of the electric cabinet ensures the safe operation of the equipment; if the power distribution room is relatively concentrated and the number is small, the inspection becomes relatively simple; , rural power grid, etc.), the inspection will consume a lot of manpower

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