Working Group Details
PQ-1453_WG - Light Flicker Working Group
|Working Group Chair||
|IEEE Program Manager|
P1453 - Voltage Fluctuations\Flicker Standard for the Analysis of Fluctuating Power Installations on Power Systems
This standard provides background on system voltage fluctuations caused by fluctuations in power demands of variable loads and power outputs of variable generation sources. The manifestation of supply voltage fluctuations as lamp flicker or perceived changes in light output of lamps is presented. A flicker measurement method is presented using a meter that is completely described in IEC 61000-4-15. The short-term (Pst) and long-term (Plt) flicker indices used for the analysis of flicker data are defined. Flicker planning levels that utilities need their system to be limited to in order to avoid customer complaints are defined for various system voltage levels. The procedure for determining emission limits for individual facilities at the Point of Common Coupling (PCC) is defined so that the planning levels can be achieved in practice. Then, an assessment procedure for evaluating flicker compliance against emission limits is described. Methodologies to analyze background flicker to identify the flicker contribution of individual sources are also presented. Rapid voltage changes (RVCs) that are caused by switching of certain equipment and starting of large induction motors are also defined and the limits are defined for different voltage levels at PCC. The document provides ways to estimate RVCs or flicker levels at the Point of Common Coupling (PCC) depending on the type of the flicker source. This document includes example terms and language that can be the basis for defining relative responsibilities and assessment methods for customer installations that may cause flicker.
1453.1-2012 - IEEE Guide--Adoption of IEC/TR 61000-3-7:2008, Electromagnetic compatibility (EMC)--Limits--Assessment of emission limits for the connection of fluctuating installations to MV, HV and EHV power systems
IEC/TR 61000-3-7:2008 is adopted by this guide. IEC 61000-3-7:2008 provides guidance on the principles that can be used as the basis for determining the requirements for the connection of fluctuating installations to MV, HV, and EHV power systems (LV installations are covered in otherre IEC documents). The primary objective of this guide is to provide guidance to system operators or owners on engineering practices that will facilitate adequate service quality for all connected customers. This guide provides a methodology to allocate the capacity of the system to absorb voltage fluctuations (i.e., flicker). However, it does not address how to mitigate voltage fluctuations, nor does it address how to increase the capacity of the system to absorb such disturbances. Since the procedures outlined in this guide are necessarily based on certain simplifying assumptions, the approach will not always provide an optimum solution. The recommended approach should be used with flexibility and engineering judgment, when applying the given assessment procedures in full or in part.
1453-2011 - IEEE Recommended Practice--Adoption of IEC 61000-4-15:2010, Electromagnetic compatibility (EMC)--Testing and measurement techniques--Flickermeter--Functional and design specifications
IEC 61000-4-15:2010 is adopted by this standard. IEC 61000-4-15:2010 gives a functional and design specification for flicker measuring apparatus intended to indicate the correct flicker perception level for all practical voltage fluctuation waveforms. Information is presented to enable such an instrument to be constructed. A method is given for the evaluation of flicker severity on the basis of the output of flickermeters complying with this standard. The object of IEC 61000-4-15:2010 is to provide basic information for the design and the instrumentation of an analogue or digital flicker measuring apparatus. It does not give tolerance limit values of flicker severity.
1453-2015 - IEEE Recommended Practice for the Analysis of Fluctuating Installations on Power Systems
Background on light flicker caused by fluctuations in power demands of variable loads is presented in this recommended practice. A flicker measurement method is presented using a meter that is completely described in IEC 61000-4-15. The short-term (Pst) and long-term (Plt) flicker indices used for the analysis of flicker data are defined. Flicker limits for various voltage levels are presented. An assessment procedure for evaluating flicker compliance against emission limits is described. Methodologies to analyze background flicker to identify the flicker contribution of single loads are also presented.