Standards

DL/T 2840-2024 Active

DL/T 2840-2024 Guidelines for Grounding Current Test of Transformer Core on Site

This document specifies the test wiring, test instruments, test techniques, test data processing, and result determination for on-site testing of the grounding current in the transformer core. This document is applicable to on-site testing of the grounding current in the transformer core and clamping pieces of transformers with grounding lead-out wires. Reactors can be used for reference.

Publish Date: 2024-12-25

DL/T 2839-2024 Active

DL/T 2839-2024 Field Low-frequency Heating Test Guidelines for Oil-immersed Power Transformers (Reactors)

This document specifies the requirements for the test equipment, test methods, and test reports for on-site low-frequency heating tests of oil-immersed power transformers (reactors). This document is applicable to the low-frequency heating of oil-immersed power transformers (reactors) and converter transformers used in high-voltage direct current transmission for auxiliary low-temperature environment, insulation testing, start-up operation, and diagnostic testing of hot oil circulation.

Publish Date: 2024-12-25

DL/T 2838-2024 Active

DL/T 2838-2024 Guidelines for acoustic imaging positioning technology of gas-insulated metal-enclosed switchgear

This document specifies the functional requirements, technical requirements, inspection requirements, inspection methods, inspection steps, and result analysis for acoustic imaging positioning of gas-insulated metal-enclosed switchgear (hereinafter referred to as "GIS equipment"). This document is applicable to insulation breakdown during the pressure test of GIS equipment and the acoustic imaging positioning of abnormal sounds during operation. The acoustic imaging positioning of gas-insulated metal-enclosed transmission lines (GIL) can be implemented with reference to this document.

Publish Date: 2024-12-25

DL/T 2837-2024 Active

DL/T 2837-2024 Guidelines for shielding technology of high-voltage alternating current overhead transmission lines and substation power frequency electric field

This document specifies the general requirements for the shielding of power frequency electric fields in high-voltage AC overhead transmission lines and substations, including the determination of the shielding scope, the design of the shielding solution, construction, and acceptance. This document is applicable to the shielding of power frequency electric fields in AC overhead transmission lines and substations with voltages of 110 kV and above.

Publish Date: 2024-12-25

DL/T 2836-2024 Active

DL/T 2836-2024 Performance Test Technical Specification for High-temperature Flue Side-path Evaporator for Desulfurization Wastewater (DL/T 2836-2024)

This document specifies the content and testing methods of the performance test for the high-temperature flue gas bypass evaporation device for desulfurization wastewater. This document is applicable to the high-temperature flue gas bypass evaporation device for desulfurization wastewater in thermal power plants.

Publish Date: 2024-12-25

DL/T 2835-2024 Active

DL/T 2835-2024 DL/T 2835-2024 Guidelines for Electrical Test of Direct Current Transformers

This document specifies the type test and routine test items and requirements for DC transformers, power units, valve assemblies, semiconductor assemblies, reactors, isolation transformers, and control and protection devices. This document is applicable to isolated and non-isolated DC transformers with a rated voltage of ±10kV to ±50kV at the high-voltage DC port. For other voltage levels, refer to the relevant standards for implementation.

Publish Date: 2024-12-25

DL/T 2834-2024 Active

DL/T 2834-2024 Guidelines for the Access of Electrified Railway Traction Stations to the Power Grid

This document specifies the basic requirements for the access of electrified railway traction stations to the power grid, traction power supply, traction power supply systems, design of access to the power grid, secondary electrical systems, and power quality assessment. This document is applicable to new and modified electrified railway traction stations that access the 110kV to 330kV power grid. Traction stations that have already been put into operation and access other voltage-level power grids can refer to this document for implementation.

Publish Date: 2024-12-25

DL/T 2833-2024 Active

DL/T 2833-2024 Power Quality Assessment Technical Guidelines for Voltage Sags and Transient Interruptions

This document specifies the requirements for voltage sags and short-term interruptions (hereinafter referred to as "events") in power quality assessment, including evaluation principles, monitoring and evaluation, and forecasting evaluation. This document is applicable to the evaluation of events in public AC power grids and user-accessed power systems. The evaluation of events in user internal power supply systems can be implemented with reference to this document.

Publish Date: 2024-12-25

DL/T 2832-2024 Active

DL/T 2832-2024 Flexible AC Transmission System (FACTS) Switching Station Maintenance and Operation Requirements

This document specifies the general requirements for the operation and maintenance of flexible DC transmission converter stations, as well as the requirements for the operation and maintenance of converter valves, DC field equipment, AC field equipment, DC control and protection systems, and auxiliary systems. This document applies to the operation and maintenance of converter station equipment with an AC voltage of 35kV or higher and a DC voltage of ±30kV or higher. The operation and maintenance of other converter station equipment can be implemented with reference to this document.

Publish Date: 2024-12-25

DL/T 2831-2024 Active

DL/T 2831-2024 Test Specification for Harmonic Transfer Characteristics of Voltage Transformer DL/T 2831-2024

This document specifies the requirements, methods, and data processing for testing the harmonic transmission characteristics of voltage transformers. This document is applicable to voltage transformers with voltage levels ranging from 6kV to 220kV. Voltage transformers of other voltage levels can be used for reference.

Publish Date: 2024-12-25

DL/T 2830-2024 Active

DL/T 2830-2024 DL/T 2830-2024 Flexible Substation Transformer Valve Technical Specification

This document specifies the usage conditions, technical requirements, test methods, inspection rules, marking, packaging, and transportation for converter valves in flexible substations. This document applies to converter valves used in flexible substations with voltage levels of 35kV and below. For special requirements of other projects, they can be determined according to the specific functions.

Publish Date: 2024-12-25

DL/T 2829-2024 Active

DL/T 2829-2024 Operating and Maintenance Guidelines for Switching Transformer With Load Tap-changer

This document specifies the on-site acceptance, operation requirements, maintenance requirements, common faults and their elimination methods, and maintenance processes for on-load tap-changers used in converter transformers. This document is applicable to on-load tap-changers used in converter transformers. Other transformers using on-load tap-changers can refer to this document for implementation.

Publish Date: 2024-12-25