Low Voltage Series Reactor

In modern industrial power grids, non-linear loads such as frequency converters and rectifier equipment act like "harmonic emitters", constantly injecting high-frequency harmonic pollution into the grid they are connected to. The power capacitors, which are responsible for reactive power compensation, often bear the brunt of the harmonic "attacks" and are frequently subjected to overheating damage or even trigger resonance accidents. In such a highly harmonic-polluted environment, the Low Voltage Series Reactors are absolutely necessary: they can transform into the "loyal knights" safeguarding the grid's safety, rescuing the entire low-voltage reactive power compensation system from dangers of failure and using their ingenious electromagnetic design to build a solid defense line for the power capacitor banks.

Harmonic disturbances do not merely affect a single capacitor component; instead, they trigger a negative chain reaction throughout the power supply network, forming a vicious cycle from "problem amplification" to "concentrated damage". High-frequency harmonic currents cause a significant increase in the dielectric loss of capacitors, leading to abnormal overheating within the capacitors and accelerated insulation aging. What is even more dangerous is that when the frequency of harmonics in the power grid is close to the inherent frequency of the "capacitor-power grid" circuit, an unexpected parallel resonance occurs, and the significantly elevated harmonic voltage will drive tens of times more harmonic current into this cycle. In this vicious cycle where harmonics are the culprit, the evil deeds done by harmonics on capacitors are like artificially applying continuous high-voltage electric shocks between the terminals of the capacitors, which is extremely likely to cause the capacitors to bulge, burst, or catch fire, seriously threatening the safety of the power distribution system.

The way in which the Low Voltage Series Reactors safeguard the power grid lies in the wisdom of "reconstructing the impedance". The series reactor combines its inductive reactance (XL) with the capacitive reactance (XC) in series to form a combined circuit that is sensitive to specific frequencies, known as a "tuned filter". Let's use a metaphor to understand this: We can consider a group of capacitors as a wide road that is "open" to all frequencies of current. Harmonics can freely enter this road and cause severe congestion (overload) to it. The role of the series reactor is to set up an "intelligent toll booth" at the intersection, blocking almost all harmonic currents outside. Through precise calculation and matching, this combined circuit (a group of capacitors and a series reactor) presents capacitive characteristics to the fundamental wave (50Hz), that is, the toll booth gives the green light to the fundamental wave, ensuring that reactive power compensation is not affected at all; while for the most harmful target harmonics (such as 5th/250Hz), this combined circuit presents a very high total impedance, that is, the toll booth gives the red light to the target harmonics, forming a solid "electromagnetic barrier". The result is that the vast majority of harmonic currents are eliminated by this barrier and flow into paths with lower system impedance or are absorbed by filtering devices, thereby significantly reducing the harmonic current flowing through the capacitors, fundamentally avoiding resonance amplification.

The first layer of triple protection of the Low Voltage Series Reactor is mainly manifested as direct protection of the capacitors. The reactor significantly reduces the harmonic current-carrying capacity and dielectric loss of the capacitors, restores the operating temperature of the capacitors to normal, and ensures the service life of the capacitors. The second layer of triple protection is manifested in the improvement of the system's safety level. The reactor effectively suppresses resonant overvoltages and overcurrents that may endanger the entire power distribution system, enabling the operation of transformers and cables to be more stable. The third layer of triple protection is manifested in the optimization of the compensation efficiency. In a clean current environment, the capacitor can more accurately engage the required capacitive reactance, improving the efficiency of power factor correction and avoiding incorrect tripping actions or compensation failure caused by harmonics.

Geyue Electric fully understands that harmonic control is not a battle fought by a single component, but rather a grid defense war that requires precise design and system coordination. Geyue Electric not only provides high-performance and reliable "guardian knights", the CKSG series Low Voltage Series Reactors, but also is committed to offering users a complete set of low-voltage reactive power compensation solutions from precise measurement, harmonic analysis to customized filtering compensation design. Our technical team is skilled at diagnosing the characteristics of harmonic sources on the spot, and tailoring the most suitable reactance rate and compensation capacity for users, ensuring that the reactor and capacitor work together to achieve the best protective efficiency. Choosing Geyue means you have selected the systematic interpretation ability and practical problem-solving ability for power quality issues. We are willing to safeguard every watt of electricity in your distribution system from safe, clean, and efficient operations with professional technology and reliable products.