DL/T 970-2005 in English

1 Scope

This standard specifies permissible limit of multiple abnormal operation and special operation modes of turbo-generator as well as the relevant maintenance and overhaul measures.

This standard is applicable to turbo-generator with capacity of 300 MW and above and applies to units with other capacities. As for generator having already been put into service but failing to fully meet the requirements of this standard, operating conditions may be determined for the unsatisfied provisions based on the actual situation and by reference to this standard.

2 Normative References

The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies.

GB 755-2000 Rotating Electrical Machines - Rating and Performance (idt IEC60034-1: 1996)
GB/T 7064-2002 Requirements for Turbine Type Synchronous Machine (neq IEC 60034-3: 1988)
GB/T 14285 Technical Code for Relaying Protection and Security Automatic Equipment

3 Terms and Definitions

For the purposes of this standard, the following terms and definitions apply.

Foreword i
1 Scope
2 Normative References
3 Terms and Definitions
4 Technical Requirements
4.1 Leading Phase Operation
4.2 Out-of-step Operation
4.3 Asynchronous Operation with Excitation Loss
4.4 Frequency Abnormality
4.5 Three-phase Asymmetric Operation
4.6 Peak Load Regulating Operation