Detail of Q/GDW 1480-2015

Introduction of Q/GDW 1480-2015

Technical rule for distributed resources connected to power grid 1 Scope This standard specifies the general principles and technical requirements to be followed in the operation of newly built and expanded distributed sources connected to power grid. The reconstruction of distributed resources and distributed self-contained resources can refer to this standard. This standard is applicable to distributed resources connected to power grid with voltage levels of 35kV and below in the form of synchronous generators, asynchronous generators and converters in the operating areas of the State Grid Corporation of China. 2 Normative references The following referenced documents are indispensable for the application 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. GB 2894 Safety signs and guideline for the use GB 14050 Types and safety technical requirements of system earthing 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 Power quality—Three-phase voltage unbalance GB/T 19862 General requirements for monitoring equipment of power quality GB/T 24337 Power quality—Interharmonics in public supply network DL/T 448 Technical administrative code of electric energy metering DL/T 584 Setting guide for 3kV~110kV power system protection equipment DL/T 621 Grounding for AC electrical installations DL/T 634.5101 Telecontrol equipment and systems—Part 5: Transmission protocols—Section 101: Companion standard for basic telecontrol tasks DL/T 634.5104 Telecontrol equipment and systems—Part 5-104: Transmission protocols—Network access for IEC 60870-5-101 using standard transport profiles Regulations for safety protection of electric power monitoring system Decree [2014] No.14 of the National Development and Reform Commission 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 point of common coupling connecting point of more than one user in a power system 3.2 point of interconnection the bus or node on the high-voltage side of step-up substation for distributed resources with step-up substation bus of output for distributed resources without step-up substation See Annex A for the definition of the point of interconnection 3.3 converter an electrical device for converting electrical power into one or more forms of electrical power suitable for use by a grid or a user, including rectifier, inverter, AC converter and DC converter 3.4 synchronous-machine-type power supply a power supply directly connected to the power grid through a synchronous generator 3.5 asynchronous-machine-type power supply a power supply directly connected to the power grid through an asynchronous generator 3.6 converter-type power supply a power supply connected in whole or in part to the power grid through a converter 3.7 islanding the state in which part of a power grid containing load and power supply continues to operate in isolated manner after being separated from the main grid, including unintentional islanding and intentional islanding unintentional islanding islanding occurring in an unintentional and uncontrolled manner intentional islanding islanding occurring in an intentional manner according to the preset control strategy 3.8 anti-islanding prevention from unintentional islanding

Contents of Q/GDW 1480-2015

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Basic requirements 5 Power quality 5.1 General requirements 5.2 Harmonics 5.3 Voltage deviation 5.4 Voltage fluctuation and flicker 5.5 Voltage unbalance 5.6 DC component 5.7 Electromagnetic compatibility 6 Start/Stop 6.1 General requirements 6.2 Startup 6.3 Switching off 6.4 Restoration of grid connection 7 Power control and voltage regulation 7.1 Active power control 7.2 Voltage/reactive power regulation 8 Operation adaptability 8.1 General requirements 8.2 Low-voltage ride-through 8.3 Frequency adaptability 9 Safety 9.1 General requirements 9.2 Lightning protection and grounding 9.3 Safety marking 10 Relay protection and automatic safety devices 10.1 General requirements 10.2 Voltage and frequency protection 10.3 Line protection 10.4 Anti-islanding protection 10.5 Automatic reclosing 11 Communications and information 11.1 Basic requirements 11.2 Normal operation information 12 Electric energy metering 13 Grid-connection test 13.1 Test requirements 13.2 Test items Annex A (Informative) Supplementary explanation on point of interconnection