Integrated controlled system and integrated controlled method for dynamic reactive power compensation based on touch screen, PLC and DSP

Abstract

The invention discloses an integrated controlled system and an integrated controlled method for dynamic reactive power compensation based on a touch screen, a PLC and a DSP. The system consists of an integrated control arithmetic unit, a TSC and an HVC. The control method comprises the following steps: firstly acquiring the voltage and current of a three-phase power grid and receiving related parameters from the touch screen; computing reactive capacity required by the system at the moment according to a instantaneous reactive power theory and utilizing the PLC to check a target power factor to obtain a most rational compensation loop combination plan; and finally utilizing thyristor cross-zero trigger technology to control a corresponding compensation loop for switching. The system and the method effectively solve the problems that the conventional compensation system cannot perform frequent switching and is low in response speed, low in compensation accuracy and the like, and greatly improve the stability of the system and reduce the running cost simultaneously.

Description

technical field [0001] The invention relates to a reactive power compensation system and method with comprehensive control, in particular to a dynamic reactive power compensation system and method based on touch screen, PLC and DSP comprehensive control, and belongs to the technical field of flexible AC transmission. Background technique [0002] In recent years, there have been insufficient reactive power compensation capacity and unreasonable equipment in the construction and operation of my country's power grid. This situation has caused system voltage fluctuations, reduced the service life of electrical equipment, and absorbed a large amount of reactive power. The emergence of reactive power not only leads to the decline of generator output and reduces the efficiency of power transmission and distribution equipment, but also increases the network loss, which seriously affects the quality of power supply and economy. Therefore, in order to improve the power factor, improv...

AI Technical Summary

Problems solved by technology

Since the lines or loads of most industrial and mining enterprises are mostly inductive and require capacitive reactive power, and at the same time, the main purpose is to ensure the reactive power and power factor on the production line. From an economic point of view, HVC (mechanical switching capacitors) are mostly used ) for compensation, although HVC can also automatically adjust voltage and reactive power in stages, and compensate power factor, but its biggest disadvantage is that it cannot perform frequent switching, slow response speed, and easy to cause overcompensation, etc.

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