IEEE 2748-2023

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IEEE Recommended Practice for Fault Diagnosis and Protection in Smart Distribution System (Approved Draft)

Published By	Publication Date	Number of Pages
IEEE	2023	76

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Description

New IEEE Standard – Active. The fault diagnosis and protection schemes and application cases for smart distribution systems from ac 6 kV to 20 kV are provided by this recommended practice, covering security requirements, architectures, and configuration, as well as basic functions and technical indexes of software systems and hardware terminals and requirements of information exchange. Schemes provided in this document are adaptable to various operation modes, control patterns, equipment conditions, and reliability requirements of distribution systems. This recommended practice is mainly based on engineering practices in the voltage range of 6 kV to 20 kV. The proposed fault location, isolation, and service restoration (FLISR) schemes can also be used in the voltage range of 2.4 kV to 38 kV as specified in ANSI C84.1 after an evaluation of communication conditions and cost analysis. Phase (three-phase and phase-to-phase) faults, ground (three-phase-to-ground, two-phase-to-ground, and single-phase-to-ground) faults and conductor-broken faults are covered by the fault types. Changes and needs brought by the connection of distributed generators are considered, and schemes empowered by information and communication technologies are also introduced.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std 2748™-2023 Front cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
8	Participants
9	Introduction
10	Contents
11	List of Figures
13	List of Tables
14	1. Overview 1.1 Scope 1.2 Purpose
15	1.3 Word usage 1.4 Limitations 1.5 Technology status and schema
17	2. Normative references
18	3. Definitions, acronyms, and abbreviations 3.1 Definitions
19	3.2 Acronyms and abbreviations 4. Typical grid structure 4.1 Radial topology
22	4.2 Ring topology and its operation modes
24	4.3 Neutral grounding modes 5. Fault characteristics and diagnosis 5.1 Fault types 5.2 Three-phase and phase-to-phase faults
27	5.3 Single-phase-to-ground faults
32	5.4 Conductor-broken faults
37	6. Non-communication-based FLISR scheme 6.1 Basic principles 6.2 Implementation based on the coordination of reclosers and sectionalizers
41	6.3 Implementation based on hierarchical protection schemes
45	7. Communication-assisted FLISR scheme 7.1 Distributed FLISR by smart FA system
52	7.2 Centralized FLISR by distribution automation system
58	Annex A (informative) Example cases A.1 General A.2 Case 1: Decentralized FLISR system for open-loop distribution grid
62	A.3 Case 2: Centralized FLISR system for open-loop distribution grid
66	A.4 Case 3: Decentralized FLISR system for closed-loop distribution grid
69	A.5 Case 4: Coordinated non-communication-based FLISER system for open-loop distribution grid
74	Annex B (informative) Bibliography
76	Back cover

Additional information

Standard Title	IEEE Recommended Practice for Fault Diagnosis and Protection in Smart Distribution System (Approved Draft)
Published Code	IEEE
Publication Date	2023
Pages Count	76

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