GB/T 29321-2026 Technical specification for reactive power compensation of PV power station English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 29321-2026
Technical specification for reactive power compensation of PV power station
光伏发电站无功补偿技术规范
Issue date: 2026-02-27 Implementation date: 2026-09-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 Reactive Power Capacity and Configuration
6 Voltage Regulation
7 Reactive Power and Voltage Control System
8 Verification Methods
Bibliography
Reactive power compensation technical specification for photovoltaic power station
1 Scope
This document specifies the general requirements for reactive power compensation technology in photovoltaic power stations, as well as the requirements for reactive power capacity and configuration, voltage regulation, and the reactive power and voltage control system, and describes the corresponding verification methods.
This document applies to the design, commissioning, operation, maintenance and repair of new or modified (expanded) photovoltaic power stations connected to the grid at voltage levels above 10 kV.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative reference. For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments) applies.
GB/T 19964 Technical requirements for connecting photovoltaic power station to power system
GB/T 34120 Technical requirements for power conversion system of electrochemical energy storage system
GB/T 37408 Technical requirements for photovoltaic grid connected inverter
GB 38755 Code on security and stability for power system
NB/T 32007 Testing code for power control capability of photovoltaic power station
NB/T 32026 Test and evaluation method for grid connected performance of photovoltaic power station
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 photovoltaic (PV) power station
A power generation system that directly converts solar radiation energy into electrical energy using the photovoltaic effect of photovoltaic cells.
NOTE: Generally includes transformers, inverters, photovoltaic arrays, and related auxiliary facilities.
[SOURCE: GB/T 19964-2024, 3.1]
3.2 point of connection
For a photovoltaic power station with a step up substation, it is the high voltage side busbar or node of the step up substation; for a photovoltaic power station without a step up substation, it is the output summation point of the photovoltaic power station.
[SOURCE: GB/T 19964-2024, 3.3]
3.3 dynamic reactive power response time of PV station
The time required from when the voltage at the point of connection of the PV station rises or falls abnormally and triggers the set value, until the actual output change of reactive power at the point of connection of the PV station (the difference between the target value and the initial value) reaches 90% of the target change value.
3.4 response time of reactive power and voltage control system of PV station
The time required from when the reactive power and voltage control system of the PV station receives a real time (or preset) reactive power/voltage control command from the grid dispatcher, until the actual output change of reactive power at the point of connection of the PV station (the difference between the target value and the initial value) reaches 90% of the target change value.
4 General requirements
4.1 The reactive power sources of a PV station shall include PV inverters as well as centrally installed reactive power compensation devices such as shunt capacitors, shunt reactors, static var compensators, static var generators, synchronous condensers, etc. For PV stations equipped with electrochemical energy storage, the reactive power sources shall include electrochemical energy storage converters.
4.2 PV stations shall make full use of the reactive power capacity and regulation capability of PV inverters. PV stations equipped with energy storage shall make full use of the reactive power capacity and regulation capability of PV inverters and electrochemical energy storage converters.
4.3 The reactive power output range of PV inverters installed in PV stations shall comply with the requirements of GB/T 37408.
4.4 The reactive power output range of electrochemical energy storage converters installed in PV stations shall comply with the requirements of GB/T 34120.
4.5 Dynamic reactive power compensation devices installed in PV stations shall have automatic control functions, including control modes such as constant voltage control, constant power factor control and constant reactive power control, and shall have the capability to switch between manual/automatic and remote/local modes.
4.6 PV stations shall be equipped with a reactive power and voltage control system. The system shall be able to automatically regulate the reactive power of the PV station according to the instructions of the power system dispatcher, and control the voltage at the point of connection of the PV station within the normal range. The regulation speed and control accuracy of the reactive power and voltage control system shall meet the requirements of power system voltage regulation.
4.7 The dynamic reactive power response time of the PV station shall not exceed 30 ms.
5 Reactive power capacity and configuration
5.1 The reactive power capacity of the PV station shall comply with GB 38755 and meet the requirements of basic balance by layer and zone in the power system. The configuration of reactive power capacity should consider optimising voltage regulation methods and reducing line losses, and shall meet maintenance reserve requirements.
5.2 The reactive power capacity and configuration of the PV station shall meet the requirements of GB/T 19964. For PV stations connected to a weak grid, the reactive power capacity and configuration shall be adapted to low short circuit ratio operating conditions. If necessary, it shall be determined through special studies in combination with the reactive power and voltage characteristics of the connected power system.
5.3 When the reactive power capacity of PV inverters and energy storage converters cannot meet the voltage regulation requirements of the power system, the PV station shall be equipped with additional reactive power compensation devices. PV stations may install reactive power compensation devices on the low voltage side of the step up transformer. For PV stations without a step up transformer, reactive power compensation devices may be installed at the collection point.
5.4 The main transformer of the PV station should be an on load tap changing transformer.
GB/T 29321-2026 Technical specification for reactive power compensation of PV power station English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 29321-2026
Technical specification for reactive power compensation of PV power station
光伏发电站无功补偿技术规范
Issue date: 2026-02-27 Implementation date: 2026-09-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 General Requirements
5 Reactive Power Capacity and Configuration
6 Voltage Regulation
7 Reactive Power and Voltage Control System
8 Verification Methods
Bibliography
Reactive power compensation technical specification for photovoltaic power station
1 Scope
This document specifies the general requirements for reactive power compensation technology in photovoltaic power stations, as well as the requirements for reactive power capacity and configuration, voltage regulation, and the reactive power and voltage control system, and describes the corresponding verification methods.
This document applies to the design, commissioning, operation, maintenance and repair of new or modified (expanded) photovoltaic power stations connected to the grid at voltage levels above 10 kV.
2 Normative references
The contents of the following documents constitute essential provisions of this document through normative reference. For dated references, only the edition cited applies. For undated references, the latest edition (including all amendments) applies.
GB/T 19964 Technical requirements for connecting photovoltaic power station to power system
GB/T 34120 Technical requirements for power conversion system of electrochemical energy storage system
GB/T 37408 Technical requirements for photovoltaic grid connected inverter
GB 38755 Code on security and stability for power system
NB/T 32007 Testing code for power control capability of photovoltaic power station
NB/T 32026 Test and evaluation method for grid connected performance of photovoltaic power station
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1 photovoltaic (PV) power station
A power generation system that directly converts solar radiation energy into electrical energy using the photovoltaic effect of photovoltaic cells.
NOTE: Generally includes transformers, inverters, photovoltaic arrays, and related auxiliary facilities.
[SOURCE: GB/T 19964-2024, 3.1]
3.2 point of connection
For a photovoltaic power station with a step up substation, it is the high voltage side busbar or node of the step up substation; for a photovoltaic power station without a step up substation, it is the output summation point of the photovoltaic power station.
[SOURCE: GB/T 19964-2024, 3.3]
3.3 dynamic reactive power response time of PV station
The time required from when the voltage at the point of connection of the PV station rises or falls abnormally and triggers the set value, until the actual output change of reactive power at the point of connection of the PV station (the difference between the target value and the initial value) reaches 90% of the target change value.
3.4 response time of reactive power and voltage control system of PV station
The time required from when the reactive power and voltage control system of the PV station receives a real time (or preset) reactive power/voltage control command from the grid dispatcher, until the actual output change of reactive power at the point of connection of the PV station (the difference between the target value and the initial value) reaches 90% of the target change value.
4 General requirements
4.1 The reactive power sources of a PV station shall include PV inverters as well as centrally installed reactive power compensation devices such as shunt capacitors, shunt reactors, static var compensators, static var generators, synchronous condensers, etc. For PV stations equipped with electrochemical energy storage, the reactive power sources shall include electrochemical energy storage converters.
4.2 PV stations shall make full use of the reactive power capacity and regulation capability of PV inverters. PV stations equipped with energy storage shall make full use of the reactive power capacity and regulation capability of PV inverters and electrochemical energy storage converters.
4.3 The reactive power output range of PV inverters installed in PV stations shall comply with the requirements of GB/T 37408.
4.4 The reactive power output range of electrochemical energy storage converters installed in PV stations shall comply with the requirements of GB/T 34120.
4.5 Dynamic reactive power compensation devices installed in PV stations shall have automatic control functions, including control modes such as constant voltage control, constant power factor control and constant reactive power control, and shall have the capability to switch between manual/automatic and remote/local modes.
4.6 PV stations shall be equipped with a reactive power and voltage control system. The system shall be able to automatically regulate the reactive power of the PV station according to the instructions of the power system dispatcher, and control the voltage at the point of connection of the PV station within the normal range. The regulation speed and control accuracy of the reactive power and voltage control system shall meet the requirements of power system voltage regulation.
4.7 The dynamic reactive power response time of the PV station shall not exceed 30 ms.
5 Reactive power capacity and configuration
5.1 The reactive power capacity of the PV station shall comply with GB 38755 and meet the requirements of basic balance by layer and zone in the power system. The configuration of reactive power capacity should consider optimising voltage regulation methods and reducing line losses, and shall meet maintenance reserve requirements.
5.2 The reactive power capacity and configuration of the PV station shall meet the requirements of GB/T 19964. For PV stations connected to a weak grid, the reactive power capacity and configuration shall be adapted to low short circuit ratio operating conditions. If necessary, it shall be determined through special studies in combination with the reactive power and voltage characteristics of the connected power system.
5.3 When the reactive power capacity of PV inverters and energy storage converters cannot meet the voltage regulation requirements of the power system, the PV station shall be equipped with additional reactive power compensation devices. PV stations may install reactive power compensation devices on the low voltage side of the step up transformer. For PV stations without a step up transformer, reactive power compensation devices may be installed at the collection point.
5.4 The main transformer of the PV station should be an on load tap changing transformer.
