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Voltage Disturbances versus Correction Methods
Correction Energy Maintenance Cost Limitations storage required method $/kVA None/ No No Power- tuning harmonic filters 50–200 Aging No No Surge suppressor 50–200 Aging No No Surge suppressor 40–1500 Size No No Const.-volt transformer –– None No No Volt comp
Duration Continuous ms 0.17 1 ms Continuous Continuous 0.2 s 2 s 1–60 min Over 60 min
TABLE 8.1 Voltage disturbance Waveform 1. distortion Surge 2. to 200% Surge to 200% Sag to 50% 3. at 50% load Sag to 70% at 100% of load Sag to 50% 4. Sag to 0% Sag to 0% 5. Outage 6.
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