Global interest in Power Factor Correction (PFC) is increasing for several reasons. Electric utilities are beginning to build reactive power consumption into rate policies, not only just for large industrial customers, but also increasingly for smaller commercial customers.
Also, intensified interest in energy efficiency and reduction of electricity expenses has taken hold in more modestly-sized companies. At the same time, there is a poor general understanding of how to most-effectively counter the consumption of reactive power, and the companies most recently hit by these rate policies, which are ill-equipped to understand exactly how they are being charged (there are at least three ways, some of which are not direct) and how to mitigate their consumption.
In this article, we explain the basics of reactive power consumption, why it is desirable to reduce it, how customers may be charged for it, and the possibility of installing reactive power compensation equipment to reduce those charges. In addition, we briefly explain why reactive power compensation cannot practically reduce the consumption of real power, and thus why it cannot appreciably reduce the portion of a customer bill that is based on energy consumption.
It should be clarified that PFC technology is still mainly applied in industrial customer sites although it has come out for several decades. The trend is more and more commercial customers would be charged for reactive power consumption and they were suggested or required to install PFC devices.
The motivation of this article is to let both the customers and power supplier know how to install an appropriate PFC device for the customer site depending on the operation mode and characteristics of their loads.
Yeah...I could not find anything new in this paper. I have been seeing the practice of using the fixed or switched capacitance banks to compensate the inductive KVarh in medium to large scale industries in India since long time. Though, I feel that the laws could be stricter enforce this for small businesses and housing also.
Using PFC for reducing reactive power consumption is not something new. Even in the developing nation like India, I have seen such PFC measures are being taken even some 40 years back . Most of the heavy industries have metering of reactive power usage and billing based on the reactive power.
David Patterson, known for his pioneering research that led to RAID, clusters and more, is part of a team at UC Berkeley that recently made its RISC-V processor architecture an open source hardware offering. We talk with Patterson and one of his colleagues behind the effort about the opportunities they see, what new kinds of designs they hope to enable and what it means for today’s commercial processor giants such as Intel, ARM and Imagination Technologies.