DL/T 2893-2025 in English
VALIDGeneral Technical Specifications for the Detection System of Non-Intrusive Load Monitoring Devices for Electric Power Users
- Issued on:2025-06-30
- Implemented on:2025-12-30
- File Format:PDF
- Delivery:RFQ
| Standard No: | DL/T 2893-2025 |
| Document status: | VALID |
| Title in English: | General Technical Specifications for the Detection System of Non-Intrusive Load Monitoring Devices for Electric Power Users |
| Title in Chinese: | 电力用户非介入式负荷感知装置检测系统通用技术条件 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | RFQ |
| Issued on: | 2025-06-30 |
| Implemented on: | 2025-12-30 |
| Chinese Classification: | N20-Electrical instrument and meter in general |
| Professional Classification: | DL-Electricity |
| Related Keywords: | future non-intrusive load detection systems
non-intrusive load monitoring technology non-intrusive load monitoring devices load power consumption non-intrusive electricity load monitoring devices |
Introduction
Standard Development Background and Technological Evolution
With the deepening development of smart grids, non-intrusive load monitoring technology, as a key component of electricity consumption information collection systems, plays a key role in load characteristic analysis, energy efficiency management, and demand response at the power user side. The release of DL/T 2893-2025 fills a gap in the domestic standardization of non-intrusive load sensing device detection systems, providing unified technical specifications for the design, manufacture, inspection, and use of related equipment.
Building on DL/T 2365, "Technical Specification for Non-Intrusive Electricity Load Monitoring Devices," this standard further refines the technical requirements for the detection system, reflecting the evolution from a single device specification to a systematic detection system. The standard development process fully considered the characteristics of new loads in the current power system, such as distributed energy access and electric vehicle charging, to ensure that the detection system can adapt to the needs of future grid development.
System Architecture and Technical Composition
The detection system adopts a modular design concept, consisting of detection software, load waveform library, signal output unit, full-wave signal measurement unit, communication interface unit, and multiple test units to form a complete detection system. This architectural design ensures the system's automation, standardization, and scalability during the detection process.
| System components | Core functions | Technical indicators | Test requirements |
|---|---|---|---|
| Signal output unit | Output test signal according to load waveform file | Waveform similarity ≥95%, voltage 46V-456V, current 0-120A | 6.3.1 Performance test |
| Full-wave signal measurement unit | Real-time measurement of output signal characteristic quantities | Voltage/current RMS error ±0.2%, power error ±0.5% | 6.3.2 Characteristic quantity test |
| Load waveform library | Stores standard load waveform data | Industry type ≥ 5, file format complies with GB/T 14598.24 | Clause 5.4.3 Waveform library management |
| Detection software | Automated test process control | Supports solution management, waveform library management, and result export | Clause 5.4.2 Functional inspection |
In-depth analysis of key technical indicators
Technical requirements for waveform similarity
Clause 5.3.1 of the standard clearly stipulates that the waveform similarity of the signal output unit shall not be less than 95%. The establishment of this indicator is based on the strict requirements for load feature identification accuracy. Appendix A specifies in detail the calculation method of waveform similarity, using vector modulus comparison and downsampling technology to ensure the scientificity and comparability of the test results.
Characteristic quantity measurement accuracy system
A complete accuracy system has been established for the characteristic quantity measurement of the full-wave signal measurement unit:
- Fundamental wave measurement: The error of the effective value of voltage and current is controlled within ±0.2%
- Harmonic measurement: The amplitude measurement of whole harmonics (2-41) and interharmonics, when Ihn≥10%In, the error is ±2%Ihn
- Power measurement: Instantaneous active power error is ±0.5%, reactive power error is ±1%
Comparative analysis of detection function framework
| Detection function | Technical content | Detection method | Application value |
|---|---|---|---|
| Data acquisition function | Capability of collecting voltage, current and power data of load busbars | Simulate actual load conditions through signal output units | Ensure the accuracy and completeness of basic data acquisition |
| Characteristic quantity calculation | Capability of periodically calculating load characteristic parameters | Comparison with reference values of full-wave signal measurement units | Verify the effectiveness of load characteristic extraction algorithm |
| Load type identification | Identification of electrical properties, periodic properties and load names | Verification of identification results using annotation files | Supporting load classification statistics and energy efficiency analysis |
| Load state identification | Load fluctuation event analysis and state identification | Simulate load start/stop and state change events | Achieve real-time monitoring of load operating status |
| Energy calculation by item | Estimation of load power consumption during the statistical period | Verification based on type and state identification results | Provide data support for demand-side management |
Inspection rules and implementation requirements
Classification of inspection types
Chapter 7 of the standard clearly divides inspection types into two categories: factory inspection and arrival acceptance inspection, ensuring quality control of the inspection system throughout its lifecycle. Inspection items cover six major areas: appearance inspection, performance test, and functional inspection. A comprehensive inspection principle is adopted; failure of any item will result in system failure.
Test Condition Specifications
The standard sets strict requirements for the test environment: ambient temperature 23℃±2℃, relative humidity 45%-75%, dust-free and non-corrosive gas, radiation-proof and good illumination, which ensure the accuracy and repeatability of the test results.
Industry Application and Implementation Recommendations
Implementation Path for Power Grid Enterprises
When introducing non-intrusive load sensing device detection systems, power grid enterprises are advised to:
- Establish a standardized testing laboratory and strictly control environmental conditions in accordance with Clause 5.1
- Build a load waveform library covering major industry types to ensure detection coverage
- Perform regular self-inspection and calibration of the detection system to maintain measurement accuracy
Technical Integration with Equipment Manufacturers
Equipment manufacturers should focus on:
- Waveform fidelity design of the signal output unit to ensure similarity ≥ 95%
- Communication protocol compatibility, supporting DL/T 698.45 and DL/T 645
- Develop automated testing processes for detection software to reduce manual intervention
Capacity Building for Testing Institutions
Testing agencies need to be equipped with special equipment such as waveform recorders (bandwidth ≥ 40MHz, resolution ≥ 14bit), standard electricity meters (accuracy level ≥ 0.05) and functional verification devices to establish a complete testing quality management system.
Technology Development Trend Outlook
With the in-depth application of artificial intelligence technology in the power sector, future non-intrusive load detection systems will develop in the direction of intelligence, adaptability, and high precision:
- Load feature extraction algorithms based on deep learning will further improve identification accuracy
- The application of 5G communication technology will realize real-time transmission and processing of detection data
- Digital twin technology will provide a more realistic simulation environment for the detection system
- Edge computing architecture will promote the evolution of detection systems towards distributed and lightweight
The implementation of DL/T 2893-2025 will provide a standardization basis for these technological innovations and promote the continued leading development of my country's non-intrusive load monitoring technology.
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