FGI High Voltage SVG helps upgrade power quality in the steel industry
1.Project context
The traditional TSC (thyristor switching capacitor) was used for reactive power compensation in the distribution system of rolling workshop of a large iron and steel enterprise. With the expansion of production scale, the proportion of nonlinear loads such as a large number of converters and electric arc furnaces in the workshop increased, resulting in the following problems:
Large power factor fluctuation
The average power factor is only 0.75~0.82, facing the power grid quality assessment.
The voltage flicker is serious
The impact load of rolling mill causes the bus voltage fluctuation of ±10%, which affects the operation of precision equipment.
overharmonic
The 5th and 7th harmonic content exceeds the national standard limit, and the capacitor is frequently burned.
The enterprise decided to transform the power distribution system and replace the original TSC device with high-voltage SVG to realize dynamic reactive power compensation and harmonic control.
2.Reconstruction scheme design
Technology selection
FGI technicians measure and evaluate on-site power quality problems, issue professional power quality test reports, provide solutions according to the actual situation of the site, and configure 10kV 8Mvar indoor water-cooled SVG equipment, which has faster response time and harmonic control function.
System topology
3.Technical highlight
Dynamic response capability: SVG can complete reactive power compensation within 1 power frequency cycle, effectively suppressing voltage flicker caused by impact load.
Four-quadrant operation: Support capacitive and inductive reactive power two-way adjustment, adapt to complex working conditions of steel mills.
Intelligent operation and maintenance: it can be connected to the field background or the host computer system to achieve remote monitoring and fault warning, reducing the cost of manual inspection.
Through fast dynamic compensation and harmonic suppression, high voltage SVG transformation solves the problems of slow response and harmonic amplification of traditional reactive power devices, which is both economical and reliable, and is one of the key technologies of smart grid upgrading.
FGI has focused on the research and development and application of power electronics technology for many years, SVG products have completely independent intellectual property rights, series of products are widely used in wind power, photovoltaic, metallurgy, coal and other industries, the market share has increased year by year, and won the manufacturing industry single champion title. FGI strives to implement the corporate vision of "saving energy and serving society" and contribute FGI's strength to the realization of the country's "double carbon" goal.
