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5137: Tools to Assess the PQ Impact of Large Penetrations of Modestly Rated DG on Distribution Feeders

This report presents the findings of a project with the primary objective of assessing the impact of large penetrations of modestly rated distributed generating (DG) resources where individually rated generators are less than around 100 kW and applied as single-phase installations. DG technologies falling in this category include solar, fuel-cells, microturbines, and perhaps some induction based wind-turbines. When installed in small numbers such that their aggregate capacity is small in relat

Nov 1, 2008

Research

5143B-12: Overview of Power System Harmonics

ABSTACT: Harmonics are probably more strongly associated with power quality than any other disturbance category. Harmonics can cause equipment to misoperate, capacitor banks to fail, circuit breakers to trip mysteriously, but in general, the electric power system has the ability to absorb substantial amounts of harmonic current with surprisingly little or no impact on connected equipment. Real problems from harmonics are usually confined to locations with high amounts of nonlinear, harmonic curr

Mar 1, 2010

Research

5162: Characterizing the Power Quality Phenomena Caused by Distributed Generation

In many North American jurisdictions, distributed generation (DG) projects are being developed with increasing frequency. It is likely that this will be one of the most significant trends affecting power quality in the foreseeable future.Distribution-connected generators can have either positive or negative impact on power quality. The severity of a negative impact can depend on many factors, including the size, type and location of the DG facility as well as the distribution system configuratio

May 1, 2012 - Nov 25, 2013

DEP

Research

5115: Solutions to PQ Disturbance Problems of Sensitive Equipment

There are many sources of disturbances to the public electricity supply, which are largely inevitable. Many electronic devices have some susceptibility to such disturbances. The report describes the sources of disturbances, the types of disturbance they cause, and the typical sensitive equipment. This report is focused on devices to mitigate the effects on susceptible equipment in commercial installations. Simpler devices can suppress most disturbances, but increasing protection beyond this c

Jan 1, 2004

Research

5163: A Reference Guide of Effectiveness of Power Quality Mitigation Measures and Technologies

Power quality (PQ) related issues have been evolving with the change in the landscape of the power industry, with the significant integration of Distributed Energy Resources (DER), and characteristic of non-linear loads such as with extensive use of Adjustable Speed Drives (ASD) and energy efficient lighting system. In addition, sensitive devices such as microprocessor-based controllers, which demand superior power quality, are now being used extensively. As a result of all these changes, power

Mar 28, 2013 - May 1, 2014

Research

5129: Distribution Network Impedances (English - French)

EnglishThis report presents an extensive investigation on the values and characteristics of supply system impedances in Canadian distribution systems. The investigation relied on extensive field measurements in six utility companies across the country and surveys of utility distribution system design practice. Circuit models were developed to support the analysis and result interpretation. Impedance data collected by other countries were also reviewed and compared to those obtained from this pro

Nov 1, 2007

Research

5143B-13: Harmonic Current Cancellation Case Study

ABSTRACT: Harmonic problems for industrial customers are generally caused by nonlinear loads such as adjustable-speed drives (ASDs), switching power supplies, electronic ballasts for fluorescent lighting, and arcing devices such as welders. These devices can cause nearby equipment, such as sensitive computer controls or digital clocks, to malfunction. They can also cause nearby transformers or other equipment to overheat. Finally, it is possible for these devices to cause voltage distortion or e

Mar 1, 2010

Research

5143B-07: Overview of Power System Transients

ABSTRACT: Transient voltages and currents are a result of sudden changes within the electric power system. Opening or closing of a switch or circuit breaker causes a change in circuit configuration and the associated voltages and currents. A finite amount of time is required before a new stable operating point is reached. All transients are caused by either connection or disconnection of elements within the electric circuit or injection of energy due to a direct or indirect lightning stroke or s

Mar 18, 2010

Research

5111: Approaches for Embedded Solutions

The impact of power quality variations to a specific end-user is naturally dependent on the electric power requirements of the equipment, process, or facility in question. Equipment manufacturers make design and marketing decisions that ultimately define the inherent power quality withstand capability of their equipment. This report describes technical approaches for increasing equipment immunity to power quality disturbances, including evaluation of the adequacy of existing equipment performanc

Mar 1, 2003

Research

5119: A New Approach to Power Quality Measurement Protocol

This report documents a Power Quality Measurement Protocol for the detection, classification and characterisation of power quality disturbances. A power quality measurement protocol is a set of well-defined algorithms that transform raw waveform data into a set of meaningful indices. The need for a PQ measurement protocol was identified in the early 90's, and a CEA project called ""Power Quality Measurement Protocol - CEA Guide to Performing Power Quality Surveys"" was initiated in 1991 for this

Dec 1, 2004

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