GB/T 37011-2018 in English
VALIDTechnical specification of transformers for VSC--HVDC applications
- Issued on:2018-12-28
- Implemented on:2019-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$243.00
《GB/T 37011-2018柔性直流输电用变压器技术规范》由TC44（全国变压器标准化技术委员会）归口，主管部门为中国电器工业协会。
Introduction
Interpretation of GB/T 37011-2018 National Standard of the People's Republic of China
GB/T 37011-2018 Technical Specification for Transformers for Flexible DC Transmission is a technical standard formulated for transformers used in high-voltage DC transmission systems based on voltage source converters (VSCs). This standard covers term definitions, symbols and abbreviations, product structure and classification, technical requirements and test methods, and provides important technical support for the construction and operation of flexible DC transmission systems.
Background and Significance of the Standard
With the large-scale access of renewable energy and the increasing demand for flexible regulation capabilities of power systems, flexible DC transmission technology based on voltage source converters (VSCs) has been widely used. As the core equipment in flexible DC transmission systems, the performance of flexible DC transformers is directly related to the safety and reliability of the system. The formulation of this standard aims to unify technical requirements, standardize product quality, and ensure the reliable operation of flexible DC transformers in different application scenarios.
Technical Points Overview
1. **Terms and Definitions**: Clarifies key terms in flexible DC transmission systems, such as voltage source converter, multilevel converter, symmetrical unipolar and bipolar connection methods, etc.
2. **Product Structure and Classification**: Flexible DC transformers are divided into two types: symmetrical unipolar and bipolar, which can be selected according to the installation environment (indoor/outdoor), winding form (double winding/triple winding) and cooling method (OFAF, ODAF, etc.).
3. **Technical Requirements**: Including key indicators such as insulation level, DC bias tolerance, overexcitation capability and short circuit tolerance, to ensure the stable operation of the transformer under complex working conditions.
Comparison of standard frameworks
| Technical requirements | Symmetrical single-pole flexible DC transformer | Bipolar flexible DC transformer |
|---|---|---|
| Rated voltage | $U_{\mathrm{vr}}$ is determined by the user according to the converter parameters | $U_{\mathrm{dm}}$ and $U_{\mathrm{vm}}$ are determined according to the system design |
| Insulation level | The grid-side winding complies with GB/T1094.3, and the valve-side winding requires special consideration of the DC bias voltage | Both the grid-side winding and the valve-side winding must meet the high withstand voltage requirements |
| Test methods | Including temperature rise test, sound level measurement and special tests (such as DC bias voltage tolerance) | Add repetitive impulse waveform and short-circuit withstand test requirements |
Implementation suggestions
1. System design stage: In the planning and design of the flexible DC transmission system, the rated capacity, connection group and cooling method of the transformer should be fully considered to ensure its compatibility with the converter and other equipment.
2. Selection and procurement: According to the voltage level and transmission power requirements of the system, select the flexible DC transformer model that meets the GB/T 37011-2018 standard, and specify the technical parameters and test requirements in the contract.
3. Installation and commissioning: During the installation process, the instructions provided by the manufacturer should be strictly followed, with special attention to the grounding method and insulation treatment of the valve side winding. Comprehensive test verification is required during the commissioning phase to ensure that the transformer meets all performance indicators.
4. Operation and maintenance: Regularly monitor the operating status of the transformer, including parameters such as temperature, vibration and insulating oil quality, to promptly identify and deal with potential problems and extend the service life of the equipment.
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