Business background：

       Arc furnaces and refining furnaces in the metallurgical industry will generate a large number of complex harmonics during operation, and voltage flicker, reactive power and three-phase imbalance will occur. Comprehensive treatment is required on the high-voltage side. Based on our company's many years of experience and harmonic data, we use FC filter branches to treat harmonics and compensate for some reactive power. We use SVG to quickly output inductive and capacitive power factors to adjust the power factor, and the effect of treating voltage flicker and three-phase imbalance is outstanding. According to the on-site conditions, the main power quality products configured by our company are: static high-voltage dynamic reactive power compensation device XHSVG, high-voltage filter compensation device (XHFC), active and passive combined filter compensation device (XHSVG+XHFC), etc.

Project description：

This project is a harmonic control and reactive power compensation project of a foundry in Guan County, Shandong Province. Its power supply is 6 6300KVA 35/1KV transformers, and its load is medium-frequency heating equipment. The load impact changes greatly, the reactive power is high, and the monthly reactive power fine is about 50,000 yuan. Due to the large harmonic content, it affects the operation of other users' electrical equipment. After testing, the 5th, 7th, 11th, and 13th harmonic contents in the distribution system exceed the standard, and the power factor is about 0.75.

Solution：

In view of the frequent load changes, high reactive power and large harmonic content on site, our company adopts a filtering compensation solution combining high-voltage XHSVG+XHFC, and installs a set of XHSVG-35/3000 +XHFC-35/9000 on the 35KV side. The effect is good, and the power factor is increased to 0.94. The harmonic control effect is as follows：

Governance Effect：

XHSVG-35/3000+ XHFC-35/9000	5次諧波 電流(A)	7次諧波 電流(A)	11次諧波 電流(A)	13次諧波 電流(A)	功率因數 cosφ
治理前	25	15	16	13	0.81
治理后	4.5	3	4	3	0.95

On-site pictures：

Model Description：XHSVG+FC   XHSVG+XHFC  XHSVG   XHFC  XH-SVG+XH-FC