GB/T 42149-2022 in English
VALIDRailway application—Fixed installations—Technical specification for current protection of medium voltage power supply system based on digital communication
- Issued on:2022-12-30
- Implemented on:2023-07-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$204.00
| Standard No: | GB/T 42149-2022 |
| Document status: | VALID |
| Title in English: | Railway application—Fixed installations—Technical specification for current protection of medium voltage power supply system based on digital communication |
| Title in Chinese: | 轨道交通 地面装置 基于数字通信的中压供电系统电流保护技术规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2022-12-30 |
| Implemented on: | 2023-07-01 |
| ICS Classification: | 29.280-Electric traction equipment |
| Chinese Classification: | S81-Traction substation |
| Professional Classification: | GB-National Standard |
| Related Keywords: | protection objects communication
relay protection device configuration relay protection devices medium voltage power supply system digital communication digital communication introduction |
| Related Topics: | medium voltage
Rail transit equipment protective grounding wire Rail transit power supply system Europe |
《GB/T 42149-2022轨道交通 地面装置 基于数字通信的中压供电系统电流保护技术规范》由TC278（全国轨道交通电气设备与系统标准化技术委员会）归口，TC278SC3（全国轨道交通电气设备与系统标准化技术委员会牵引供电分会）执行，主管部门为国家铁路局。
Introduction
1. Background and significance of standard formulation
With the rapid development of rail transit systems, the safety and reliability of medium-voltage power supply systems have become key issues. This standard aims to unify the technical requirements for current protection based on digital communication, ensure the interoperability of equipment from various manufacturers, and improve the stability of system operation.
2. Comparison of standard frameworks
| Standard dimensions | Old version requirements | New version requirements | Technological innovation |
|---|---|---|---|
| Protection scope | Only covers some key equipment | Fully covers ring network cables, busbars, feeders, etc. | Expanded the scope of protection objects |
| Communication protocol | No clear digital communication requirements | Mandatory use of GOOSE network | Introduction of digital communication technology |
| Redundancy configuration | No clear redundancy requirements | Requires dual redundant configuration | Improve system reliability |
3. Interpretation of core technical requirements
3.1 Relay protection device configuration
Relay protection devices based on digital communication must meet the following requirements:
- Support GOOSE network transmission, with at least 2 interfaces, and optical fiber interfaces.
- Equipped with an independent monitoring network interface to ensure the security of information transmission.
- The protection function should be used in conjunction with overcurrent, zero-sequence current protection and other functions.
4. Implementation suggestions
In actual applications, it is recommended that:
- Select relay protection devices and network equipment in strict accordance with standard requirements.
- Establish a complete test verification mechanism to ensure that the equipment performance meets the requirements.
- Optimize the GOOSE network architecture to ensure that the communication delay is within 5ms.
- Perform regular system maintenance to ensure the accuracy and effectiveness of the protection configuration.
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