Hydro Ottawa

Hydro Ottawa

February 07, 2012 10:00 ET

Hydro Ottawa Participates in IESO Voltage Reduction Exercise

OTTAWA, ONTARIO--(Marketwire - Feb. 7, 2012) - Hydro Ottawa, along with other local distribution companies throughout Ontario, is participating in a province-wide voltage reduction test on Tuesday, February 7th. This exercise, which is conducted by the Independent Electricity System Operator (IESO), is not expected to have any negative effects on electricity consumers. Brief voltage reductions of this scale are not noticeable to most customers except for the possibility of a slight dimming of the lights.

The voltage reduction test will consist of two exercises:

  • A 3% voltage reduction to take place early on test day, and
  • A 5% voltage reduction to occur about one hour after the completion of the first exercise.

Both tests will be one hour in duration. Tests are subject to postponement and may be rescheduled for Thursday, February 9th if system conditions are unfavourable.

Voltage reduction is an emergency operating measure that the IESO can employ in order to protect the reliability of the power system or to avoid the need for rotating power outages when the demand for electricity in the province exceeds supply. The IESO performs this test every 18 months to ensure the effectiveness of this measure.

Voltage reduction tests allow the IESO to record the load reduction resulting from a system wide voltage reduction, and to locate potential problems that may occur during emergencies. They are an important part of emergency training for the IESO and market participants, including Hydro Ottawa.

To report any disruption in power during the exercise or at any other time, please call Hydro Ottawa's 24-hour Power Outage line at 613-738-0188.

About the Independent Electricity System Operator (IESO)

The IESO is responsible for managing Ontario's bulk electricity system and operating the wholesale electricity market. For more information, visit www.ieso.ca.

About Hydro Ottawa

Hydro Ottawa Holding Inc. (Hydro Ottawa) owns and operates two subsidiary companies, Hydro Ottawa Limited and Energy Ottawa Inc. Hydro Ottawa Limited is the third largest municipally owned electrical utility in Ontario serving more than 300,000 customers in the City of Ottawa and the Village of Casselman. Energy Ottawa Inc., Ottawa's largest producer of green power, generates renewable energy and provides commercial energy management services.

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