DL/T 993-2019 in English
VALIDGeneral specification for power system out-of-step separation equipment
- Issued on:2019-06-04
- Implemented on:2019-10-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$311.00
| Standard No: | DL/T 993-2019 |
| Document status: | VALID |
| Title in English: | General specification for power system out-of-step separation equipment |
| Title in Chinese: | 电力系统失步解列装置通用技术条件 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2019-06-04 |
| Implemented on: | 2019-10-01 |
| Superseding: |
DL/T 993-2006 General specification for power system out-of-step separation equipment
|
| Professional Classification: | DL-Electricity |
| Related Keywords: | out-of-step separation equipment introduction standard evolution
power system system power smart substation equipment air discharge dc power supply ripple |
| Related Topics: | Power Systems
power system device iec Fault removal device technology dl/t2011-2019 dl/t1966-2019 dl/t5784-2019 dl/t5787-2019 dl/t 5786-2019 dl/t 799 -2019 dl/t 5796-2019 |
Introduction
Standard Evolution and Technological Innovation
| Comparison Dimensions | 2006 Edition | 2019 Edition |
|---|---|---|
| Terminology | Not a separate chapter | Added Chapter 3: Definition of Terms |
| Smart Substation | Not covered | Added Clause 4.14 |
| Decoupling Criteria | Basic Functions | Added 5 new functions such as area discrimination and cycle counting |
Analysis of core technical requirements
4.1 Environmental conditions Three types of working conditions are defined: normal operating temperature -10℃~+55℃, benchmark test temperature 20±5℃, and extreme transportation temperature -25℃~+70℃. It is specifically stipulated that smart substation equipment must comply with the requirements of GB/T 32901-2016.
5.2.7 Action area identification The device is required to identify the oscillation center position through the setting value. A typical case shows that when the system power angle swing exceeds 180° and lasts ≥160ms, the device should accurately operate within one oscillation cycle.
Key test specifications
7.4 Electromagnetic compatibility test adopts port analysis method, including:
- Radiated emission limit: ≤40dBμV/m in 30MHz~1GHz frequency band
- Immunity requirements: able to withstand 4kV contact discharge and 8kV air discharge
- DC power supply ripple: ≤5% does not affect the device logic judgment
Implementation suggestions
- Selection configuration: give priority to equipment that supports DL/T 860 communication protocol
- Setting value: the oscillation cycle count should maintain a 2-level difference with the backup protection
- Acceptance test: must include the dynamic simulation test specified in 7.9.2
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