Discussion Overview
The discussion revolves around the cost implications of operating a three-phase, 11kV network without power factor correction (PFC) equipment. Participants explore how to calculate the increased electricity costs incurred during a period when PFC was switched off, considering a constant load of approximately 2.5MW.
Discussion Character
- Technical explanation
- Debate/contested
- Mathematical reasoning
Main Points Raised
- One participant seeks to calculate the cost of running without PFC, emphasizing the need to include these costs in an insurance claim.
- Another suggests using a power meter capable of measuring power factor to assist in the calculations.
- A participant provides context on how uncorrected loads affect utility costs, noting that utilities may charge based on distribution demand and energy supplied, with specific reference to Dominion Power's billing practices.
- One participant mentions reviewing earlier bills that include charges for kVAr, anticipating a significant increase due to the PFC being turned off.
- Another confirms that the purpose of PFC is to reduce kVAr, supporting the previous participant's concerns about increased charges.
- A question is raised about the possibility of installing a kvar-hr meter to measure the reactive power consumption more accurately.
Areas of Agreement / Disagreement
Participants generally agree on the implications of operating without PFC and the potential for increased costs, but there is no consensus on the exact calculations or methods to quantify these costs.
Contextual Notes
Participants mention various factors that could influence costs, such as utility-specific billing structures and the impact of uncorrected power factor on distribution demand charges. There are also references to specific utility practices that may not be universally applicable.
Who May Find This Useful
This discussion may be useful for electrical engineers, facility managers, and professionals involved in energy management or utility billing analysis.