Detailed explanation of series reactor selection difficult problem

Series reactor (hereinafter referred to as series resistance) is a parallel capacitor device (hereinafter referred to as the capacitor device or capacitor group) is one of the main components, which plays a limit capacitor bank (back to back) closing surge in power harmonic suppression, to prevent the capacitor Damage, and to avoid the capacitive device access to the harmonic harmonic over-amplification and resonance and so on an important role.However, string resistance and capacitor can not be arbitrarily combined, if not consider the capacitance device access to the actual situation of the grid, the "one size fits all" (Such as capacitors are equipped with a reactance of 5% to 6% of the string resistance), often counterproductive, leading to a serious amplification of harmonics and even resonance, endanger the safety of devices and systems.Because of the presence of oil immersed distribution transformer harmonics The complexity and randomness of the capacitive devices, and the difference of the structure and characteristics of the electric network in which the capacitive devices are located make the choice of the harmonic response and the series reactance rate of the capacitor devices a difficult problem and a research topic. However, with the deepening of the research work and the accumulation of practical experience, many consensus opinions or effective measures have been put forward, or some suggestions have been made for the design of string reactors in the design of capacitor installations. Lessons Learned. The string resistance has both the advantages of suppressing inrush current and harmonics, but also has its additional power loss and construction investment and operating costs of the shortcomings.Therefore, the new expansion of the capacitor device, Or has been put into operation of the capacitor device in the series of anti-selection program, the technical and economic comparison is necessary.This paper focuses on the part of the capacitor device engineering design followed the choice of 6% string anti-problem analysis, with a view to device construction and Operation has some benefits.