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VOLTAGE QUALITY INDICES IN GREAT BRITAIN. Transmission - TSOs report: Number of incidents of voltage excursions outside limits of ±10% of nominal voltage (400kV, 275kV and 132kV) for 15 minutes Only one voltage excursion in 2001/02 Distribution – DNOs report:
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VOLTAGE QUALITY INDICES IN GREAT BRITAIN • Transmission - TSOs report: • Number of incidents of voltage excursions outside limits of ±10% of nominal voltage (400kV, 275kV and 132kV) for 15 minutes • Only one voltage excursion in 2001/02 • Distribution – DNOs report: • Number of verified voltage complaints • 10-year average between 0.3 and 3.8 per 10,000 customers
Victoria, Australia – Continuous monitoring of harmonics, flicker and voltage unbalance at transmission substations (www.vencorp.co.au)