DL/T 1819-2018 in English
VALIDSpecification of static frequency converter for pumped storage power plant
- Issued on:2018-04-03
- Implemented on:2018-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$175.00
| Standard No: | DL/T 1819-2018 |
| Document status: | VALID |
| Title in English: | Specification of static frequency converter for pumped storage power plant |
| Title in Chinese: | 抽水蓄能电站静止变频装置技术条件 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2018-04-03 |
| Implemented on: | 2018-07-01 |
| Professional Classification: | DL-Electricity |
| Related Topics: | power station
Static Elimination Device Denaturing conditions Non-denaturing conditions Static setting 5sec qPCR instrument installation conditions Smart substation measurement device control technology Completion acceptance of pumped storage power station Acceptance of pumped storage power station Construction supervision of pumped storage power station Soil and Water Conservation Technology for Pumped Storage Power Station |
Introduction
Analysis of the Standard Technical Framework
| Core Module | Technology from the 1990s | DL/T1819-2018 Requirements | Technological Evolution |
|---|---|---|---|
| Cooling System | Single Air Cooling Method | Air Cooling/Water Cooling Dual Modes, Water Cooling Conductivity <2μS/cm | Thermal Management Accuracy Improved by 300% |
| Electromagnetic Compatibility | No System-Level Standard | Appendix A Clarifies the Immunity Levels for Category 4 Ports | Establish a Complete EMC Protection System |
| Startup reliability | Single startup success rate ≤95% | Annual success rate ≥99%, availability ≥99.9% | O&M costs reduced by 40% |
Detailed explanation of key technical indicators
Environmental adaptability: The standard requires that the thyristor valve water-cooling temperature limit for static frequency converters at an altitude of ≤1000m must be +5°C for water cooling and -5°C for air cooling. A typical case study shows that the Zhanghewan Power Station, by adding a preheating module, ensures that the equipment still meets startup requirements in an environment of -15°C.
Dynamic performance: The output frequency is continuously adjustable from 0-52.5Hz, with a control accuracy of ±0.05Hz. Measured data from the Tongbai Power Station shows that this indicator can shorten the unit's grid connection time to 2.3 minutes (the standard requirement is ≤5 minutes).
Implementation Recommendations
- When selecting the input transformer, a 20% harmonic tolerance margin should be reserved, and temperature rise verification should be carried out in accordance with GB/T18494.
- It is recommended to adopt a 12-pulse structure to reduce input-side harmonics to below 60% of the GB/T14549 limit.
- Electromagnetic compatibility testing must include three mandatory inspection items: radio frequency field immunity (10V/m), electrostatic discharge (8kV), and surge impact (2kV).
Background of Standard Development
With the single-unit capacity of pumped-storage units exceeding 400MW, traditional frequency conversion devices have exposed obvious shortcomings in start-up success rate and electromagnetic interference. This standard unified for the first time: ① the n+1 redundancy principle for thyristor valves ② the dual cooling system configuration requirements ③ the four-level power frequency magnetic field immunity standard (300A/m), filling a gap in the industry.
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