By CIOReview | Monday, November 25, 2024
Graftech
● Located in Apodaca, Nuevo Leon, Mexico.
● Dedicated to the manufacture of electrodes.
● They were facing power quality problems.
Findings
● Inductive non-compliance 100% of the time.
● High load variations.
● No compensation equipment.
● A relatively high level of 2nd harmonic is present.
Solution: Installation of two STATCOMs +/- 10 MVAr each
● One STATCOM was installed for each of the two transformers.
● 36 MVA mains (230 - 13.8 KV).
● Faster solution for power factor compensation.
● Active harmonic current filtering capability.
● Less area required per KVAR.
● Newest and most reliable technology available.
Why is STATCOM the best technology?
● Equipment responds dynamically to the load.
● Operation of the equipment is by power electronics.
● Compared to its main predecessor, the SVC, the STATCOM has much higher efficiency and performance.
Results
● The STATCOM met the dynamic MVAr demand created by the variable load center operation.
● An average PF value of 0.99 is met 100% of the time.
● Improvements in power quality parameters
● For voltage unbalance, a maximum value of 0.171 % was obtained during the measurement period, remaining below the 2% limit established in the Grid Code.
● Current unbalance had a maximum value of 4.814 % during the measurement period, remaining below the 15% limit established in the CoR.
● The values of odd and even single harmonic components are within the limits.
● Harmonic currents were reduced, highlighting the 2nd harmonic current.
● The maximum THDD[%] value in the measurement period was 1.09 %, remaining below the limit, which for this load center is 3.75%.
● Flicker values for the 95th percentile Short Term Voltage Swing Index (STFI) was 0.382 remaining below the Grid Code limit of 1.0.
● Flicker values for the 95th percentile Long Term Voltage Fluctuation (LTI) Index was 0.329 remaining below the Grid Code limit of 0.80.
Benefits
● Grid code compliance.
● Longer useful life of plant equipment.
● Lower energy and maintenance costs.
● Improved process efficiency.
● Increased production capacity.
● Financial bonus from the supplier.
Do you have similar goals?
We can help you make them a reality. Talk to one of our experts and we will offer you personalized advice, according to your needs.
I agree We use cookies on this website to enhance your user experience. By clicking any link on this page you are giving your consent for us to set cookies. More info