GB/T 33591-2017 in English
VALIDTechnical specification of time synchronism system and equipment in smart substation
- Issued on:2017-05-12
- Implemented on:2017-12-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
Price(USD)：
$250.00
$243.00
$243.00
《GB/T 33591-2017智能变电站时间同步系统及设备技术规范》由TC446（全国电网运行与控制标准化技术委员会）归口，主管部门为中国电力企业联合会。
Introduction
Standard framework of time synchronization system for smart substation
| Standard dimensions | Technical requirements | Performance indicators | Implementation suggestions |
|---|---|---|---|
| System architecture | - Dual-master clock configuration method - Master-slave clock networking structure | - Switching time is less than 1μs - Timekeeping performance is better than 1μs/h | It is recommended to adopt dual-master clock redundant configuration to ensure system reliability. |
| Transmission medium | - Multimode optical fiber: Communication between master and slave clocks- Coaxial cable: Space-based timing signal transmission | - Optical fiber transmission jitter time is less than 200ns - Serial port transmission accuracy is better than 1μs | Select the appropriate medium according to the application scenario. Optical fiber is preferably used for long-distance transmission. |
| Timing signal | - Pulse signal- IRIG-B code- Network time message (NTP/SNTP) - Serial port time message | - Pulse signal: width 10ms~200ms - NTP accuracy is better than 10ms | Select the appropriate timing method according to the equipment requirements. Network timing is suitable for station control layer equipment. |
Standard Development Background and Technology Evolution Analysis
Case Study: Practical Application of Smart Substation Time Synchronization System
In actual power systems, the time synchronization system of smart substations needs to meet the requirements of high precision and high reliability. For example, under the jump control of ±1μs, ensure the accurate action of protection devices and measurement and control equipment to avoid misoperation caused by time deviation.
Implementation Suggestions
- System Selection:Choose appropriate master-slave clock configuration according to the voltage level and scale of the substation to ensure redundancy and scalability.
- Signal Transmission:Optical fiber media is preferred to reduce the impact of electromagnetic interference on time synchronization accuracy.
- Equipment Selection:Select devices that comply with the DL/T 860 series standards to ensure compatibility with existing systems.
- Maintenance management: Regularly check the antenna status, power supply and signal quality to avoid time deviation caused by environmental factors.
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