Presentation is loading. Please wait.

Presentation is loading. Please wait.

Power Quality Mike Thornton National Sales Manager.

Similar presentations


Presentation on theme: "Power Quality Mike Thornton National Sales Manager."— Presentation transcript:

1 Power Quality Mike Thornton National Sales Manager

2 ©ABB Power Technology Front End Sales BA PTPH - LV Capacitors Poor Power Quality: What is it TO YOU? Any event related to the electrical network that makes you lose money… - Power supply failures E.g. Breakers tripping, fuses blowing - Equipment failure, malfunctioning and lifetime reduction E.g. - Equipment overheating (transformers, motors, …) - Damage to sensitive equipment (PCs, UPS-systems, Drives) - Capacitor problems - Electronic communication interference - System losses - Utility regulations G5/4 and penalties - Personnel issues (illness, work efficiency, …)

3 ©ABB Power Technology Front End Sales BA PTPH - LV Capacitors A load which draws a non-sinusoidal (distorted) current, when a pure sinusoidal voltage is applied, is a non-linear load Where do harmonics come from? ‘Sinusoidal’ supply voltage Non-linear load All non-linear loads create harmonics Harmonics = the distorted waveform – the 50Hz/60Hz part in the waveform

4 ©ABB Power Technology Front End Sales BA PTPH - LV Capacitors Non-linear loads are everywhere and in ever increasing number! Industrial loads (mainly 3-wire systems) AC and DC drives, UPS-systems, … => Harmonics between phases, imbalance, sometimes reactive power Commercial loads (mainly 4-wire systems) All office equipment such as computers, fluorescent lighting, photo copiers, fax-machines, … =>Harmonics in neutral and between phases, imbalance, sometimes reactive power are connected between line & neutral generating 3rd harmonic in the neutral conductor Some loads are unbalanced Where to find non-linear loads?

5 ©ABB Power Technology Front End Sales BA PTPH - LV Capacitors The best solution to harmonic problems Active harmonic filters Filtering principle: cancellation of harmonics by equal and opposite harmonic generation by an active filter device LOAD CURRENT ACTIVE FILTER CURRENT CLEAN FEEDER CURRENT Waveforms + = Harmonics

6 ©ABB Power Technology Front End Sales BA PTPH - LV Capacitors Cable car application Problem: - Utility uses ripple control signals at 1050 Hz and 1600 Hz - High frequency components present on the public network

7 ©ABB Power Technology Front End Sales BA PTPH - LV Capacitors Cable car application Initial line current without ABB active filter Solution: ABB active filter

8 ©ABB Power Technology Front End Sales BA PTPH - LV Capacitors Cable car application Current [Arms] Filtered line current with ABB active filter Solution: ABB active filter

9 ©ABB Power Technology Front End Sales BA PTPH - LV Capacitors Neutral protection overload Protection Ith (L): 100A RMS N: 65-80% * Ith MVLV PQFT L1 (R) L2 (Y) L3 (B) N NL Loads: - Fluor. light - PCs -... NL Loads: - Fluor. light - PCs -... NL Loads: - Fluor. light - PCs -...

10 ©ABB Power Technology Front End Sales BA PTPH - LV Capacitors Neutral protection overload H3 in neutral with and without filter Without filter: - I H3  150 A RMS With filter: - I H3  0 A RMS Time [10 ms/div] I [100 A/div] Without filter With filter

11 ©ABB Power Technology Front End Sales BA PTPH - LV Capacitors THE solution to poor power quality ABB premium class Active Filters: PQFKPQFM PQFI

12 ©ABB Power Technology Front End Sales BA PTPH - LV Capacitors Power Quality Solutions Power Factor Correction Passive Harmonic Filters Active Harmonic Filters Flicker – Dynamic Compensation

13 A global leader in power and automation technologies that enable utility and industry customers to improve their performance while lowering environmental impact


Download ppt "Power Quality Mike Thornton National Sales Manager."

Similar presentations


Ads by Google