Modularized three-phase four-wire active power filter

Abstract

The invention relates to a modularized three-phase four-wire active power filter. The active power filter adopts profiles to set up the frame structure of the complete machine or adopts standard distribution cabinet type. The active power filter is provided with the following five main functional modules based on functions: a circuit breaker module, a filter module, a converter module, a reactor module and a harmonic analyzer module. Different modules achieve the aims of electrical connection and data communication through corresponding hardware interfaces. The modules are respectively installed in boxes formed by the profiles according to function difference. The functions of the modules are relatively independent. Each module can be singly changed, thus being convenient for upgrading and capacity expansion of the functions and breakdown maintenance and improving the practicability and flexibility of the active power filter. The active power filter has strong anti-jamming capability and high filtering performance index, is stable and reliable and is convenient and simple in installation and wiring.

Description

technical field [0001] The invention relates to a power filter, in particular to a modular three-phase four-wire active power filter. Background technique [0002] At present, in the commonly used three-phase four-wire active power filter, the usual installation structure only places the internal components directly inside the box or cabinet, so that when the three-phase four-wire active power filter needs to be upgraded or extended During fault maintenance, it is necessary to detect and modify the entire box or cabinet, which is not conducive to upgrade expansion and fault repair, and the interference of the main circuit to the control circuit has not been effectively limited, which will affect the performance of the active power filter Indicators and working stability, once a failure occurs, it must be shut down for maintenance. After maintenance, the machine must pass the whole machine debugging and inspection before it can be used. The inspection and debugging of the t...

AI Technical Summary

Problems solved by technology

The inspection and debugging of the three-phase four-wire active filter is more complicated, and it is difficult to carry out on site. Moreover, the current structure is generally installed as a whole machine, which is large in size and heavy in weight, and it is difficult to return to the factory for maintenance.

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