Powered by Google-Search & Google-Books Chinese Standards Shop Database: 169760 (Sep 19, 2020)

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Status	Related Standard
DL/T 911-2004	English	70	Add to Cart	0--15 minutes. Auto immediate delivery.	Frequency response analysis on winding deformation of power transformers	Obsolete	DL/T 911-2004

DL/T 911–2004
911-2004)
ICS 27.100
F 24
File No.. 15182-2005
PROFESSIONAL STANDARD OF THE PEOPLE’S
REPUBLIC OF CHINA
Frequency Response Analysis on Winding
Deformation of Power Transformers
电力变压器绕组变形的频率响应分析法
ISSUED ON. DECEMBER 14, 2004
IMPLEMENTED ON. JUNE 1, 2005
Issued by. National Development and Reform Commission of the
People's Republic of China
Table of Contents
FOREWORD ... 2
1 SCOPE ... 3
2 NORMATIVE REFERENCES ... 3
3 TERMS AND DEFINITIONS ... 3
4 TESTING THEORY ... 5
5 REQUIREMENTS OF TESTING INSTRUMENT ... 6
6 TEST METHOD ... 8
7 ANALYTICAL JUDGMENT OF WINDING DEFORMATION ... 9
ANNEX A (NORMATIVE) AUXILIARY JUDGMENT ON DEFORMATION OF TRANSFORMER WINDING
THROUGH THE CORRELATION FACTOR R ... 14
ANNEX B (INFORMATIVE) TYPICAL AMPLITUDE FREQUENCY RESPONSE CHARACTERISTICS CURVE
OF DEFORMATION OF TRANSFORMER WINDING ... 16
REFERENCES AND ORIGINAL CHINESE DOCUMENTS ... 20
Foreword
In accordance with the requirements of the document - "Notice on confirming the
formulation and revision planning of power industry standards in 1999" (Guo Jing Mao
Dian Li [1999] No.40) issued by the Former State Economic and Trade Commission, this
Standard is formulated, with the objective of regulating and guiding field application of
the frequency response analysis on winding deformation of power transformer.
Frequency response analysis, used to test the deformation of transformer winding, has
advantages in high testing sensitivity and convenient in field service; and does not
require transformer hood suspending. It has been widely used in the power industry.
Annex A is normative and Annex B is informative in this Standard.
This Standard is proposed by the China Electricity Council (CEC).
The technical committee for standardization of high voltage test technology in power
sector governs this Standard and is in charge of the explanation.
Drafting organizations. China Electric Power Research Institute (CEPRI), Guangdong
Power Experimental Research Institute, Fujian Power Test & Research Institute, Anhui
Electric Power Research Institute, North China Electric Power Research Institute,
Wuhan High Voltage Research Institute
Chief drafting staffs. Wang Sheng, Gao Keli, Lin Chunyao, Ouyang Xudong, Zhang
Konglin, Yu Guogang, He Hongming, Ma Jixian, Mei Gang
Frequency Response Analysis on Winding
Deformation of Power Transformers
1 Scope
This Standard specifies the basic requirements in the frequency response analysis on
deformation of transformer winding.
This Standard is applicable to power transformers of 6kV or higher voltage class, and
other transformers for special purpose.
2 Normative References
The following standards contain provisions which, through reference in this text,
constitute provisions of this Standard. For dated reference, subsequent modifications
(excluding corrected contents) or revisions do not apply to this Standard. However, all
parties reach to agreement according to this Standard are encouraged to study whether
the latest edition of these documents is applicable. For undated references, the latest
edition of the normative document referred to applies to this Standard.
GB 1094.1 Power transformers - Part 1. General (eqv IEC 60076-1. 1993)
GB 1094.5 Power transformers - Part 5. Ability to withstand short circuit (neq IEC
60076-5. 1976)
DL/T 596 Preventive test code for electric power equipment
3 Terms and definitions
For the purpose of this Standard, the following terms and definitions shall apply.
3.1
Winding deformation
It is referred to axial or radial dimensional variation of power transformer winding caused
under mechanical force or electro-dynamical action, and usually appears as partial
deformation, hunching or displacement of winding. When a transformer is suffered from
the short-circuit current rush or crash in transportation, winding deformation may happen.
This will directly affect the safe operation of transformer.
3.2
Dual-port network
It is referred to network having a pair of input ports and a pair of output ports. The
network - consisted of linear resistance, inductance (including mutual inductance) and
capacitive components, and without independent power supply inside - is called as
active linear dual-port network. When the frequency is higher, the transformer winding
may be regarded as active linear dual-port network.
3.3
Transfer function ......

Related standard:   DL/T 911-2016  DL/T 920-2019