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GB/T 44114-2024: Specification of operation and control for connecting electrochemical energy storage system to low-voltage distribution network Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 44114-2024: Specification of operation and control for connecting electrochemical energy storage system to low-voltage distribution network---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT44114-2024 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 27.180 CCS F 19 Specification of Operation and Control for Connecting Electrochemical Energy Storage System to Low-Voltage Distribution Network Issued on: MAY 28, 2024 Implemented on: DECEMBER 1, 2024 Issued by. State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of ContentsForeword... 3 1 Scope... 4 2 Normative References... 4 3 Terms and Definitions... 5 4 General Requirements... 5 5 Operational Management... 6 6 On/Off-Grid Switching... 6 7 Power Control... 6 8 Operational Adaptability... 7 9 Protection... 10 10 Communication... 10 11 Power Quality... 11 12 Power Metering... 11 Specification of Operation and Control for Connecting Electrochemical Energy Storage System to Low-Voltage Distribution Network1 ScopeThis Document specifies the general requirements of electrochemical energy storage system connected to low-voltage distribution network; and the technical requirements for its operational management, on/off-grid switching, power control, operational adaptability, protection, communication, power quality and power metering. This Document applies to the operation and control of electrochemical energy storage system connected to distribution network below 10(6) kV.2 Normative ReferencesThe provisions in following documents become the essential provisions of this Document through reference in this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document. GB/T 12325 Power quality - Deviation of supply voltage GB/T 12326 Power quality - Voltage fluctuation and flicker GB/T 14285 Technical code for relaying protection and security automatic equipment GB/T 14549 Quality of Electric Energy Supply - Harmonics in Public Supply Network GB/T 15543 Quality of electric energy supply - Admissible three-phase voltage unbalance factor GB/T 17215.321 Electricity metering equipment (AC) - Particular requirements - Part 21. Static meters for active energy (Classes A, B, C, D and E) GB/T 24337 Power quality – Inter-harmonics in public supply network GB/T 36558 General technical requirements for electrochemical energy storage system of power system GB/T 36572 Guidelines of cyber security protection for electric power system supervision and control GB/T 40427 Technical guidelines for power system voltage and reactive power GB/T 43526 Technical requirements for connecting user-side electrochemical energy storage system to distribution network GB/T 50063 Code for design of electrical measuring device of power system DL/T 645 Multi-function watt-hour meter communication protocol DL/T 2528 Basic terminology of electrical energy storage3 Terms and DefinitionsFor the purposes of this Document, the terms and definitions given in DL/T 2528 apply.4 General Requirements4.1 The electrochemical energy storage system shall meet the requirements of GB/T 43526; and the technical conditions of its equipment shall meet the requirements of GB/T 36558. 4.2 The electrochemical energy storage system connected to the 380 V distribution network shall be done in a three-phase balanced manner. Before the electrochemical energy storage system is connected to the 220 V distribution network in a single phase, the three-phase energy storage capacity and load shall be checked; and the three-phase power imbalance should not occur. 4.3 Before the electrochemical energy storage system is connected to the low-voltage distribution network, it shall be reported to the power grid management department and the network access procedures shall be handled. 4.4 When an electrochemical energy storage system fails or is abnormal, it shall be disconnected from the grid. 4.5 The electrochemical energy storage system shall clarify the operation and maintenance requirements and formulate emergency measures. 4.6 For electrochemical energy storage systems of non-natural person users, operation and maintenance personnel shall be established or specified to be responsible for daily inspections and fault handling of the operating equipment of the electrochemical energy storage system.5 Operational Management5.1 The electrochemical energy storage system shall not change the grid-connected capacity and grid-connected access mode. 5.2 The operation modes of the electrochemical energy storage system shall include peak cut, demand response, voltage/power factor control, planned islanding, etc. 5.3 In the peak cut mode, the electrochemical energy storage system shall operate according to the power planning curve. 5.4 In the demand response mode, the system power of the electrochemical energy storage system shall track the response demand within the validity period of the invitation. 5.5 In the voltage/power factor control mode, the electrochemical energy storage system shall automatically adjust the grid connection point power factor according to the voltage control strategy and meet the requirements of GB/T 40427. 5.6 In the planned island operation mode, the electrochemical energy storage system shall promptly notify the grid operation and maintenance department.6 On/Off-Grid Switching6.1 If the electrochemical energy storage system is disconnected from the grid due to a fault or abnormality on the grid side, it shall be delayed to connect to the grid after the grid resumes normal operation; and the grid-connected delay setting value shall be greater than 20 s. 6.2 If the electrochemical energy storage system is shut down and disconnected from the grid due to a fault or emergency situation by manual operation, it shall not automatically resume connection to the grid. After the fault is handled, it shall be restored to connect to the grid by manual operation. 6.3 In the case of unplanned island mode, the electrochemical energy storage system shall be disconnected from the grid within 2 s. 6.4 When the electrochemical energy storage system enters the planned island mode, it shall be confirmed that the power supply and distribution system of the planned island part and the upper grid have been disconnected; before ending the planned island mode, it shall be confirmed that the distribution network has returned to normal.7 Power Control7.1 Active power control11 Power Quality11.1 When the electrochemical energy storage system is connected to the low-voltage distribution network, the power quality indicators at the grid connection point and the public connection point shall meet the following requirements. a) Harmonics and inter-harmonics shall meet the requirements of GB/T 14549 and GB/T 24337, respectively; b) Voltage deviation shall meet the requirements of GB/T 12325; c) Voltage fluctuation and flicker shall meet the requirements of GB/T 12326; d) Voltage imbalance shall meet the requirements of GB/T 15543. 11.2 When the grid connection of the electrochemical energy storage system causes the power quality at the public connection point to fail to meet the requirements, the connection with the grid shall be disconnected; and effective governance measures shall be taken. The grid connection can only be reconnected after the power quality meets the requirements.12 Power Metering12.1 When the electrochemical energy storage system is connected to the low-voltage distribution network, it should set up a smart power meter at the grid connection point, which has the functions of bidirectional active power and bidirectional reactive power metering. 12.2 For electrochemical energy storage systems participating in the electricity market, the electricity metering shall meet the following requirements. a) Metering points shall be set up at the public connection point and the grid connection point, respectively; and the configuration of the electricity meter shall meet the requirements of GB/T 50063; b) The electricity meter shall have the functions of bidirectional active power metering and bidirectional reactive power metering; and the technical performance shall meet the requirements of GB/T 17215.321; the communication protocol shall meet the requirements of DL/T 645; and the data collection frequency should be no less than 15 min; c) The collected information includes but is not limited to the load curves such as voltage, current, power factor, etc. at the public connection point and the grid connection point, as well as the daily positive/reverse active power and daily positive/reverse reactive power. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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