The hidden cost of poor power quality (original) (raw)

Consequences of poor power quality for grid operators

… Distribution-Part 1, …, 2009

Modern installations are more sensitive to power quality (PQ) aspects because an increasing number of electronic devices are used nowadays. However, most of these devices produce distortions in the power system itself because of their nonlinear operating characteristics. At present, the scope of the available PQ standard for the customer's installation is limited. It does not indicate extensively all PQ requirements at the customer's point of connections. When more customers negatively influence the PQ of the grid, various network components can get affected. Hence, the grid operators can have direct or indirect extra costs related to various PQ phenomena such as: power system harmonics, voltage dips and flicker. Estimating the financial consequences of poor PQ for the grid operators is a difficult task as not many analysis and practical studies are carried out yet. In this paper, a theoretical framework is given to estimate various technical and financial impacts for different network components because of PQ problems.

Decision path for investments on solutions to power quality problems

During the last decades, power quality (PQ) related disturbances in the electricity networks have got increased attention. The customers have become more aware of the power quality of the electricity supply. They use more sensitive electronic devices that demand undistorted power supply. On the contrary, these devices often cause PQ disturbances into the network themselves. Some of the PQ problems (such as voltage dips, transients etc.) can cause large techno-economical inconveniences to the customers while some other PQ problems (such as harmonics) can have adverse impacts on the operation of the network components. As PQ problems are mostly originated from the customer side, the network operators do not want to take full responsibility of delivering an undistorted supply voltage waveform at the customer's terminals without current quality regulation. Hence, PQ related disputes among the customers, the network operators and the equipment manufacturers have increased. A number o...

Summary of the economic impacts of power quality on consumers

2015

The quality of the electrical supply has a direct impact on the correct function and operation of equipment connected to the public electricity supply network. There is an expectation that devices will operate as designed and that equipment lifetime should, statistically, be close to the designed value. The reliability of the network is generally assumed to be high enough so as to not cause unacceptable issues with regard to loss of production or loss of functionality. Quantifying the cost to the consumer when the supply power quality or reliability are not as expected is an important metric and can be used as business case to justify expenditure in order to improve the supply network. This paper explores the research associated with quantifying the cost of reliability and power quality. Several power quality disturbances are investigated and possible methods of quantifying both the effect and cost are presented. Due to the complex nature of equipment performance with regard to power quality, there is a need for extensive research in order to develop a generalised approach to lifetime and cost evaluation.

Power quality and reliability

IEEE Industry Applications Magazine, 2005

NDUSTRIAL AND COMMERCIAL ELECTRICITY CONSUMERS are increasingly impacted by poor power quality and reliability (PQ&R). A utility distribution system fault, even hundreds of miles away, can cause widespread voltage sags that shut down susceptible process equipment [1]. Correlating process interruptions with voltage disturbances requires prompt notification of such PQ&R events. Effective communication with the utility company and assessment of mitigation equipment options are greatly facilitated when local historical PQ&R data are available, but only if the information is put in a form that the customer can act on. A Web-based, near real-time PQ&R monitoring system is continuing to be put in place to provide such information, both locally and on a nationwide basis [2]. Low-cost monitors record PQ&R event characteristics and, using an internal modem, transmit event data via the Internet to a central database. The database servers are a component of the system, and no additional hardware or software is needed by the end user. The monitor system infrastructure, shared by all monitor owners, provides capabilities for data aggregation and display, e-mail and pager notification, site administration, and summary reporting of the data using a Web browser. The system provides real-time notification of PQ&R events at single or multiple facilities and access to statistical information and trends related to PQ&R events as well as voltage regulation and imbalance. A principal goal is deployment of a vast network of monitors, which cannot be accomplished unless the monitors are affordable and the infrastructure is scalable.

IJERT-A Critique of State-of-The-Art Access to Power Quality Enhancement and Objections

International Journal of Engineering Research and Technology (IJERT), 2021

https://www.ijert.org/a-critique-of-state-of-the-art-access-to-power-quality-enhancement-and-objections https://www.ijert.org/research/a-critique-of-state-of-the-art-access-to-power-quality-enhancement-and-objections-IJERTV10IS030045.pdf In the next few years, more than 80% of AC power is to be processed through power converters owing to their benefits of energy conservation, flexibility, network interconnection, and weight and volume reduction in a number of equipment such as lighting arrestors, HVAC computers, fans, and so on.This paper gives an introduction on power quality (PQ), causes and effects of power quality problems. It also deals with power quality definitions, terminologies, standards, benchmarks , monitoring requirements, financial loss, and analytical quantification. It also discusses various types of nonlinear loads, which cause these power quality problems,they are illustrated, classified, modeled, quantified, and analyzed for associated power quality issues.