IEEE 2938-2023

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IEEE Guide for Economic Loss Evaluation of Sensitive Industrial Customers Caused by Voltage Sags (Published)

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IEEE	2023

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Description

New IEEE Standard – Active. The production process of sensitive users is easy to interrupt due to voltage sag, resulting in a lot of economic losses. A method to evaluate the economic losses of sensitive industrial users due to voltage sag is provided in this guide. This document specifies the costs of power quality monitoring and voltage sag mitigation projects for power users, proposes the economic loss indexes due to voltage sag, and introduces the technical and economic evaluation method of voltage sag mitigation projects. This document gives the process of evaluating the economic loss due to voltage sag and the decision-making of mitigation scheme, and recommends the experimental method of testing user equipment and production line.

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PDF Pages	PDF Title
1	IEEE Std 2938™-2023 Front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
10	Introduction
11	Contents
13	List of Figures
14	List of Tables
15	1. Overview 1.1 Scope 1.2 Purpose 1.3 Word usage
16	2. Normative references 3. Definitions, acronyms, and abbreviations 3.1 Definitions
17	3.2 Acronyms and abbreviations
18	4. Principles and process of economic loss evaluation for voltage sag management 4.1 General 4.2 Process of economic loss evaluation for voltage sag management
19	5. Method of data and information collection 5.1 General database for economic loss evaluation
21	5.2 The information and data collection from user side
26	6. The items of costs for voltage sag management of economic loss evaluation 6.1 General 6.2 Cost of power quality monitoring
27	6.3 Cost of voltage sag mitigation
29	7. The indexes of the cost and economic loss evaluation of voltage sag management 7.1 General 7.2 Annual cost of the monitor project (Acmo) 7.3 Annual cost of the mitigation project (Acmi) 7.4 Severity of single industrial process consequence (Ssingle)
30	7.5 Economic loss for single trip of industry process (Esingle)
31	7.6 Annual economic loss for a user (Eannual) 7.7 User annual total cost (UATC)
32	7.8 Unit output cost (UOC) 7.9 Unit electricity cost (UEC)
33	8. Economy of cost-investment evaluation methods for voltage sag management 8.1 General 8.2 Equipment life cycle cost analysis (LCC) 8.3 Net present value method (NPV)
34	8.4 Payback period method
35	Annex A (informative) Typical test results of sensitive equipment tolerance against voltage sag
40	Annex B (informative) Practical test methods for the tolerance of sensitive equipment to voltage sags B.1 Dichotomy in duration (TM1)
42	B.2 Dichotomy both in magnitude and duration (TM2)
45	Annex C (informative) Example of data collection C.1 Example of the collected basic information C.2 Example of the collected industrial process information
48	C.3 Example of the collected power network information
49	Annex D (informative) Example of information of voltage sag
51	Annex E (informative) Calculation equation of capital equivalent E.1 Equation of one-time payment for final value E.2 Equation of one-time payment for present value E.3 Equation of equal payment for final value E.4 Equation of equal payment for sinking fund E.5 Equation of equal payment for present value
52	E.6 Equation of equal payment for capital recovery
53	Annex F (informative) Example of evaluating the trip probability of industry process F.1 Evaluation of the trip probability of equipment
54	F.2 Evaluation of the trip probability of industry process
56	Annex G (informative) Trip probability of sensitive equipment under different sag characteristics
61	Annex H (informative) Example of evaluating the items and indexes of cost and economic loss for voltage sag management H.1 Calculating the items of annual cost of voltage sag mitigation project
62	H.2 Evaluating the severity of single industrial process consequence
63	H.3 Evaluating annual economic loss after voltage sag mitigation project
64	Annex I (informative) Example of evaluating the economy of cost-investment for the voltage sag mitigation I.1 Formulation of voltage sag mitigation schemes
68	I.2 Economic index calculation of four mitigation schemes
71	Annex J (informative) Bibliography
72	Back cover

Additional information

Standard Title	IEEE Guide for Economic Loss Evaluation of Sensitive Industrial Customers Caused by Voltage Sags (Published)
Published Code	IEEE
Publication Date	2023

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