Detail of GB/T 19964-2024

Introduction of GB/T 19964-2024

Technical requirements for connecting photovoltaic power station to power system 1 Scope This document specifies the technical requirements for connecting photovoltaic (PV) power station to power system in terms of active power, reactive voltage, fault ride through, operational adaptability, power prediction, power quality, simulation models and parameters, and secondary systems, as well as their testing and evaluation contents. This document is applicable to the construction, production and operation of newly built, renovated and expanded PV power stations connected to the grid through voltage class above 10 kV. This document may also serve as a reference for PV power stations equipped with energy storage device. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions 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/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 22239 Information security technology - Baseline for classified protection of cybersecurity GB/T 24337 Power quality - Interharmonics in public supply network GB/T 29321 Technical specification for reactive power compensation of PV power station GB/T 31464 The grid operation code GB/T 32900 Technical specification for relaying protection of photovoltaic power station GB/T 33982 Technical specification for grid connection protection of distributed resources GB/T 36572 Guidelines of cyber security protection for electric power system supervision and control GB/T 37408 Technical requirements for photovoltaic gird-connected inverter GB/T 37409 Testing specification for photovoltaic grid-connected inverter GB 38755 Code on security and stability for power system GB/T 40289 Technical requirement of power control system for photovoltaic power station GB/T 40581 Calculation specification for power system security and stability GB/T 40594 Technical guide for power grid and source coordination GB/T 40595 Guide for technology and test on primary frequency control of grid-connected power resource GB/T 40604 Information exchange technical requirements for energy dispatch and operation of renewable energy station GB/T 40607 Technical requirements for dispatching side forecasting system of wind or photovoltaic power GB/T 50866 Design code for photovoltaic power station connecting to power system DL/T 448 Technical administrative code of electric energy metering DL/T 5003 Code for design of dispatch automation in power system 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 40581, GB/T 40594 and GB/T 40595 and the following apply. 3.1 photovoltaic (PV) power station power generation system that uses the photovoltaic effect of PV cells to directly convert solar radiation energy into electrical energy Note: It generally includes transformers, inverters and PV arrays, as well as related auxiliary facilities, etc. 3.2 inverter device that converts direct current into alternating current 3.3 point of connection high-voltage side busbar or node of the booster station for PV power stations with booster stations; output summary point of the PV power stations for PV power stations without booster stations 3.4 PV power forecasting establishing a PV power generation prediction model based on historical power, meteorological data, and equipment operation status of the PV power station, and using irradiance, power, or numerical weather forecast data as inputs to the model, combined with the equipment status and operating conditions of the PV power generation system, to predict the active power of the PV power station for a period of time in the future Note: According to the forecast period, it is divided into medium-term, short-term and ultra-short-term PV power forecasts. 3.5 medium-term PV power forecasting prediction of the active power of the PV power station from 0:00 the next day to the next 240h, with a time resolution of 15 min 3.6 short-term PV power forecasting prediction of the active power of the PV power station from 0:00 the next day to the next 72h, with a time resolution of 15 min 3.7 ultra-short-term PV power forecasting prediction of the active power of the PV power station in the next 15 min to 4h, with a time resolution of 15 min 3.8 low voltage ride through of PV power station capability of a PV power station to operate continuously without disconnecting from the grid within a certain range and time interval when the voltage of point of connection at the PV power station drops due to power system accidents or disturbances 3.9 high voltage ride through of PV power station capability of a PV power station to operate continuously without disconnecting from the grid within a certain range and time interval when the voltage of point of connection at the PV power station rises due to power system accidents or disturbances 3.10 low-high voltage ride through of PV power station capability of a PV power station to operate continuously without disconnecting from the grid within a certain range and time interval of voltage drop and rise when the voltage of point of connection at the PV power station first drops and then rises due to power system accidents or disturbances Note: Referred to as low-high voltage ride through. 3.11 dynamic reactive current increment of PV power station amount of change in reactive current injected or absorbed by a PV power station into the power system during low or high voltage ride through relative to the reactive current injected or absorbed into the power system before the voltage drop or rise Note: Reactive current refers to capacitive reactive current. 3.12 rise time of dynamic reactive current of PV power station time required from the time when the voltage at the point of connection drops or rises to the trigger setpoint until the dynamic reactive current increment of the PV power station reaches 90% of the incremental target value 3.13 islanding state in which part of a power grid containing load and power supply continues to operate in isolation after being separated from the main grid Note: Islanding can be divided into unintentional islanding and intentional islanding. The unintentional islanding refers to the unintentional and uncontrolled occurrence of islanding; the intentional islanding refers to the intentional occurrence of islanding according to the pre-configured control strategy. 3.14 anti-islanding prevent the occurrence of unintentional islanding

Contents of GB/T 19964-2024

Foreword i 1 Scope 2 Normative references 3 Terms and definitions 4 Active power 5 Reactive voltage 6 Fault ride through 7 Operational adaptability 8 Power forecasting 9 Power quality 10 Simulation models and parameters 11 Secondary system 12 Test and evaluation