P1453 - Voltage Fluctuations\Flicker Standard for the Analysis of Fluctuating Power Installations on Power Systems
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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.
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