IEEE P2760 D5 April:2020 pdf download.Draft Guide for Wind P ower Plant Grounding System Design for Personnel Safety.
This guide is primarily concerned with the collector system grounding for onshore wind power plants (WPPs). This guide is not intended for the WPP substation, however since the substation is typically interconnected with the collector system. its design might affect or be affected by the collector system. With proper consideration, the methods described herein could be used in determining the impact of the collector system on substation safety and vice versa.
Quantitative analysis of the effects of overvoltage transients (switching and lightning) is beyond the scope of this document. Similarly, this guide does not cover offshore WPPs, battery energy storage facilities, solar power plants, or substation grounding.
1.2 Purpose
The intent of this guide is to provide guidance and information pertinent to the grounding practices in WPP collector system for personal safety.
The specific purposes of this guide arc to:
a) Identify differences between substation grounding (covered under IEEE Std 80) and WPP collector system grounding.
b) Establish, as a basis for design, safety limits of potential differences that can exist in a WPP collection system under fault conditions between points that can be contacted by the human body.
c) Review WPP grounding practices with reference to safety criteria, for the design and provide a procedure for the design of practical grounding systems, based on these criteria.
d) Develop analytical methods as an aid in the understanding and solution of typical voltage gradient problems within a WPP.
This guide is primarily concerned with grounding practices within WPPs for 50 Hz or 60 Hz systems. DC systems are beyond the scope of this guide. A grounding system designed as described herein does,nonetheless, provide some degree of protection against steep wave front surges entering the wind turbine generator (WTG) and passing to earth through its grounding system electrodes.
1.3 Word usage
The word shall indicates mandatory requirements strictly to be followed in order to conform to the standard and from which no deviation is permitted (shall equals is required to).’2
The word should indicates that among several possibilities one is recommended as particularly suitable, without mentioning or excluding others; or that a certain course of action is preferred but not necessarily required (should equals is recommended that).
The word rnai’ is used to indicate a course of action permissible within the limits of the standard (may equals is permitted to).
The word can is used for statements of possibility and capability, whether material, physical, or causal (can equals is able to).IEEE P2760 D5 April pdf download.