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.
Standard
GB/Z 44118.1-2024 Power quality technical management—Part 1: General guidelines (English Version)
Standard No.
GB/Z 44118.1-2024
Status
valid
Language
English
File Format
PDF
Word Count
32500 words
Price(USD)
975.0
Implemented on
2024-9-1
Delivery
via email in 1~3 business day
Detail of GB/Z 44118.1-2024
Standard No.
GB/Z 44118.1-2024
English Name
Power quality technical management—Part 1: General guidelines
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.
