Standard No.:	GB/Z 44118.1-2024
English Name:	Power quality technical management—Part 1: General guidelines
Chinese Name:	电能质量技术管理 第1部分：总则
Chinese Classification:	K04    Basic standards and general methods
Professional Classification:	GB    National Standard
Source Content Issued by:	SAMR; SAC
Issued on:	2024-05-28
Implemented on:	2024-9-1
Status:	valid
Target Language:	English
File Format:	PDF
Word Count:	32500 words
Translation Price(USD):	975.0
Delivery:	via email in 1~3 business day

GB/Z 44118.1-2024 Power quality technical management - Part 1: General guidelines 1 Scope This document, which is a Technical Specification, is intended to provide provisions associated to the main use cases regarding recognized engineering practices applicable to power quality management in public electric power supply networks. It summarizes the operation in power quality management and investigates the current standards, for requirement of power quality assessment work, as well as to promote the development of power quality management best practices. The power quality management domain groups use cases and associated power quality requirements common to network management, including customer support network operation, network and extension planning. This document captures possible "common and repeated usage" of power quality management under the format of "use case". Use case implementations are given for information purpose only. This document derives the common requirement as provisions by further standardization activities, in terms of actors interacting with the given system. The interface requirement is considered for later standardization activities. The relationship of the stakeholders in power quality management, such as network operator, network user, etc., are discussed in the document. Table 1 highlights the domains and business use cases described. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61 000-3 (all parts) Electromagnetic compatibility (EMC) - Part 3: Limits IEC 61000-3-2 Electromagnetic compatibility (EMC) - Part 3-2: Limits - Limits for harmonic current emissions (equipment input current ≤ 16 A per phase) Note: GB 17625.1-2022, Electromagnetic compatibility - Limits - Part 1: Limits for harmonic current emissions(equipment input current ≤16 A per phase) (IEC 61000-3-2:2020, MOD) IEC 61000-3-3 Electromagnetic compatibility (EMC) - Part 3-3: Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply system, for equipment with rated current ≤ 16 A per phase and not subject to conditional connection Note: GB/T 17625.2-2007, Electromagnetic compatibility (EMC) - Limits - Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current ≤16 A per phase and not subject to conditional connection (IEC 61000-3-3:2005, IDT) IEC TS 6 000-3-4 Electromagnetic compatibility (EMC) - Part 3-4: Limits - Limitation of emission of harmonic currents in low-voltage power supply systems for equipment with rated current greater than 16 A 3 Terms, definitions and abbreviated terms 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. ISO and IEC maintain terminological databases for use in standardization at the following addresses: • ISO Online browsing platform: available at http://www.iso.org/obp • IEC Electropedia: available at http://www.electropedia.org/ 3.1.1 power quality characteristics of the electricity at a given point on an electrical power system, evaluated against a set of reference technical parameters [SOURCE: GB/T 2900.87-2011, 617-01-05 , modified] 3.1.2 power quality indices technical parameters characterizing the quality of electricity, measured at a given point, relevant for the assessment of the quality of the electricity delivered by a network operator [SOURCE: IEC TS 62749:2020, 3.29] 3.1.3 nominal voltage voltage by which a system is designated or identified [SOURCE: GB/T 17626.30-2012, 3.18] 3.1.4 voltage unbalance in a polyphase system, a condition in which the RMS values of the phase voltages (fundamental component) or the phase angles between consecutive phases are not all equal. Note 1: The degree of the inequality is usually expressed as the ratios of the negative and zero-sequence components to the positive-sequence component. Note 2: In this standard, voltage unbalance is considered in relation to 3-phase systems. [SOURCE: GB/T 4365-2003, 161-08-09, modified] 3.1.5 voltage deviation difference between the supply voltage at a given instant and the declared supply voltage 3.1.6 flicker impression of unsteadiness of visual sensation induced by a light stimulus whose luminance or spectral distribution fluctuates with time [SOURCE: GB/T 4365-2003, 161-08-13] 3.1.7 voltage dip a sudden reduction of the voltage at a point in an electrical system followed by voltage recovery after a short period of time from a few cycles to a few seconds. [SOURCE: GB/T 4365-2003, 161-08-10] 3.1.8 short interruption the disappearance of the supply voltage for a time interval whose duration is between two specified limits Note y: A short interruption is considered to be a reduction of the supply voltage to less than 1 % of the nominal voltage, with the lower limit of the duration typically a few tenths of a second, and its upper limit typically in the order of one minute (or, in some cases up to three minutes). [SOURCE: GB/T 4365-2003,161-08-20] 3.1.9 harmonic component sinusoidal component of a periodic quantity having a harmonic frequency [SOURCE: GB/T 2900.33-2004, 551-20-07, modified] 3.1.10 harmonic frequency frequency which is an integer multiple greater than one of the fundamental frequency or of the reference fundamental frequency [SOURCE: GB/T 2900.33-2004, 551-20-05] 3.1.11 interharmonic component sinusoidal component of a periodic quantity having an interharmonic frequency [SOURCE: GB/T 2900.33-2004, 551-20-08] 3.1.12 interharmonic frequency frequency which is a non-integer multiple of the reference fundamental frequency [SOURCE: GB/T 2900.33-2004, 551-20-06] 3.1.13 system operator; network operator party responsible for safe and reliable operation of a part of the electric power system in a certain area and for connection to other parts of the electric power system [SOURCE: GB/T 2900.87-2011, 617-02-09] 3.1.14 (power) network user; (power) system user party supplying electric power and energy to, or being supplied with electric power and energy from, a transmission system or a distribution system [SOURCE: GB/T 2900.87-2011, 617-02-07] 3.1.15 stakeholders individual, group or organization that has an interest in an organization or activity Note: Usually a stakeholder can affect or is affected by the organization or the activity. [SOURCE: IEC 60050-904:201 4, 904-01-10] 3.1.16 system average RMS variation frequency index; SARFI a power quality index that provides a count or rate of voltage dips, swells, and/or interruptions for a system. [SOURCE: IEC TS 62749:2020, 5.3.3.2] 3.1.17 distribution system operator party operating a distribution system [SOURCE: GB/T 2900.87-2011, 617-02-10] 3.1.18 transmission system operator party operating a transmission system [SOURCE: GB/T 2900.87-2011, 617-02-11] 3.2 Abbreviated terms Abbreviations used in the text are defined in Table 2.