GB/T 44933-2024 in English
VALIDTechnical specification for flywheel energy storage system used for electrical energy storage system
- Issued on:2024-12-31
- Implemented on:2025-07-01
- File Format:PDF
- Delivery:Via email within 8 business days
$612.00
| Standard No: | GB/T 44933-2024 |
| Document status: | VALID |
| Title in English: | Technical specification for flywheel energy storage system used for electrical energy storage system |
| Title in Chinese: | 电力储能用飞轮储能系统技术规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 8 business days |
| Issued on: | 2024-12-31 |
| Implemented on: | 2025-07-01 |
| ICS Classification: | 27.180-Wind turbine systems and other alternative sources of energy |
| Chinese Classification: | F19-New energy and others |
| Professional Classification: | GB-National Standard |
| Related Keywords: | flywheel energy storage system
flywheel energy storage systems flywheel energy storage unit flywheel energy storage converter electrical energy storage system introduction analysis |
| Related Topics: | energy storage
Energy storage technology Energy storage system flywheel equipment Electric energy storage Flywheel energy storage system performance test Energy storage system operation and maintenance technology |
《GB/T 44933-2024电力储能用飞轮储能系统技术规范》由TC550（全国电力储能标准化技术委员会）归口，主管部门为中国电力企业联合会。
Introduction
Analysis of the core content of the standard
GB/T44933-2024 is my country's first special technical standard for flywheel energy storage systems for power energy storage, applicable to AC grid-connected systems with a rated discharge power ≥ 200kW. The standard constructs a complete technical system from three dimensions: system architecture, performance indicators, and test methods.
Comparison of key technical indicators
| Parameter category | Charging condition | Discharging condition | Allowable deviation |
|---|---|---|---|
| Active power (≥80% rated) | ≥Pech | ≥Pedch | ±1.5% |
| Response time | ≤200ms | - | |
| Cycle efficiency | ≥80% | - | |
System architecture requirements
The standard stipulates that the flywheel energy storage system must include four core components:
- Flywheel energy storage unit (including flywheel body and auxiliary devices)
- Flywheel energy storage converter (machine side + grid side)
- Auxiliary system (including emergency braking device)
- Management system
The typical architecture places special emphasis on the dual communication path design, requiring support for both DL/T634.5104 and DL/T860 communication protocols.
Key Technical Innovations
- Millisecond response: hysteresis time ≤100ms, charge and discharge conversion ≤300ms
- Three-level alarm system: first-level alarms such as flywheel instability and overspeed require emergency braking to be triggered within 300ms
- Wide voltage adaptation: 380V system needs to work continuously within the range of 85%-110%Un
Typical application scenario parameters
| Application type | Power requirement | Response time |
|---|---|---|
| Frequency modulation auxiliary | ≥200kW | ≤200ms |
| Voltage sag support | ≥500kW | ≤100ms |
Detailed explanation of test method
The standard stipulates 39 test items in 12 categories. The key tests include:
- Power control test: Use 1ms sampling accuracy to verify dynamic response
- Emergency braking test: The speed is required to drop from the upper limit to 50% of the lower limit within the time required to meet the standard
- Overload test: Verify the ability to maintain 110% power for 10 minutes
The test environment must meet the following requirements: temperature -20℃~40℃, humidity ≤95%, altitude ≤2000m (adjustment is required for plateau according to GB/T20626.1)
Implementation suggestions
- Model matching: Select the appropriate power level according to the application scenario. It is recommended to configure a ≥1MW system for the frequency modulation scenario
- Safety protection: A dual emergency braking device must be configured, and the braking energy dissipation resistor requires an independent heat dissipation design
- Operation and maintenance points: Focus on the monitoring of vacuum degree (≤10-3Pa) and bearing temperature (≤85℃)
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