Integrated intelligent variable capacitor

Abstract

The invention discloses an integrated intelligent variable capacitor, which comprises a shell and a capacitor bank arranged in the shell. The integrated intelligent variable capacitor is characterized in that: the capacitor bank comprises a plurality of basic capacitor units, wherein the minimum capacitance value in the basic capacitor units is used as a base number, and the multiplying power of the capacitance value of each basic capacitor unit relative to the base number corresponds to a digital value with bit right in a numerical value coding system; and the capacitor bank is provided with a control system and a switching mechanism, wherein the control system comprises a control signal receiving device and a coding scheme generating device, and the coding scheme generating device generates a code according to the control signal received by the control signal receiving device to control the operation of the switching mechanism and realize output of capacitance values. Adjustment of random precision and random range of the capacitor can be realized, and the capacitor can be conveniently manufactured into nominal series products and products of special specifications customized according to special requirements.

Description

technical field [0001] The invention relates to a capacitor, in particular to an integrated capacitor with a controllable and variable output capacitance value, which can be used as a reactive power compensation and harmonic elimination device in a grid power supply system. Background technique [0002] Due to the existence of a large number of nonlinear power consumption (inductive load and capacitive load), in the process of power network construction, transformation and operation, eliminating the resulting reactive power and harmonics has become an indispensable requirement. How to more effectively compensate reactive power and eliminate harmonics to improve power quality has become the focus of modern power grid operation and management. [0003] In the existing reactive power compensation and harmonic elimination technology, a capacitor (group) with fixed value is generally used. Although different levels of capacitance values ​​can be obtained, there may be a gap betwe...

AI Technical Summary

Problems solved by technology

The control countermeasures cannot be changed in time with the drift of the harmonic frequency, and the power quality cannot be fundamentally improved

[0004] In other words, when the load changes frequently, the existing technology will not be able to accurately compensate or eliminate harmonics, because the pre-configured capacitors do not match the capacitance values ​​that need to be input, and cannot meet the actual needs of the system

[0005] On the other hand, due to the need to use multiple capacitors to build, when constructing each reactive power compensation device, a series of work such as the selection of capacitor banks, the construction of circuits, and the establishment of control systems are required, which is more complicated to implement, resulting in cost increase

In addition, because it is impossible or difficult to make a standard module, it is not conducive to rapid maintenance and installation, and the construction efficiency is low, especially in the occasions where timeliness and continuity of power consumption are emphasized, failure to recover quickly will bring greater losses.

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