Critical Examination of the Dissipation Factor Tip-Up as a Measure of Partial Discharge Intensity

Kelen, Andreas

doi:10.1109/tei.1978.298094

Cited by 14 publications

(1 citation statement)

References 6 publications

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“…This problem has acquired new importance with modern diagnostic approaches, as discussed in Section 6 . Testers using resonant voltage sources that produce a very pure sine wave are aware of this problem, as is discussed in [16]. Besides, such voltage sources also have certain other advantages.…”

Section: Pd Intensitymentioning

confidence: 99%

Evidence and presumption in PD diagnostics

Kelen¹,

Danikas

1995

IEEE Trans. Dielect. Electr. Insul.

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A general outline of the development of PD diagnostics is given with emphasis on problems of the validity of underlying models and the interpretation of results, because PD diagnostics is hardly ever direct and instead rests on a chain of inferences. Some major classical approaches are reviewed in this context, with a discussion of certain problems that also are significant for modern approaches. After a discussion of primary PD events and resulting degradation, some basic matters regarding measurement and testing are described and their problems are discussed. Particular attention is then paid t o various approaches to PD pulse spectroscopy and its application to product diagnostics, particularly after algorithmic processing of the recorded data. The paper concludes with a discussion of conclusions that may or may not be drawn validly from PD diagnostics. A number of warnings and some suggestions of further development are given.

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Section: Pd Intensitymentioning

confidence: 99%

Evidence and presumption in PD diagnostics

Kelen¹,

Danikas

1995

IEEE Trans. Dielect. Electr. Insul.

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A new AC current testing method for nondestructive insulation test

Terase

Takagi

1979

Electrical Engineering Japan

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An insulation diagnostic method for high‐voltage rotating machine coils with low applied voltage

Mitsui

Akahori

Yoshida

et al. 1983

Electrical Engineering Japan

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1. I n t r o d u c t i o n Electrical a p p a r a t u s i n s u l a t i o n d e t e ri o r a t e s due t o thermal, e l e c t r i c a l , environmental and mechanical stresses during operat i o n . Malfunction g e n e r a l l y is caused by i n s u l a t i o n d e t e r i o r a t i o n . Hence i n s u l a t i o n d i a g n o s i s r e q u i r e s a good knowledge of t h e d e t e r i o r a t i o n mechanism. Thus, t h e accelera t e d d e t e r i o r a t i o n test r e q u i r e s knowledge of a v a r i e t y of stresses, t h e v o l t a g e chara c t e r i s t i c s of d e t e r i o r a t e d and normal insul a t i o n and t h e accumulation of f i e l d d a t a during operation. This paper p r e s e n t s an i n s u l a t i o n diagn o s t i c method i n c o r p o r a t i n g a v a r i e t y of tests under d i f f e r e n t stresses [I-41. I n s u l a t i o n d i a g n o s i s of high-voltage r o t a t i n g machines h a s h i t h e r t o been judged using n o n d e t e r i o r a t e d i n s u l a t i o n i n t h e following methods: ac c u r r e n t -t e s t method; new ac c u r r e n t -t e s t method [ S ] ; t a n 6 method; and discharge method. These g e n e r a l l y cons t i t u t e t h e i n s u l a t i o n d e t e r i o r a t i o n diagnost i c methods. However, when an i n s u l a t i o n d i a g n o s i s method c o n s i d e r s high-voltages, a s u f f i c i e n t void d i s c h a r g e can n o t be genera t e d when t h e maximum test v o l t a g e i s low and a c c u r a t e measurement i s u n l i k e l y . Moreover, when t h e maximum test v o l t a g e i s h i g h , i n s u l a t i o n damage can occur [6, 71. S t u d i e s based on d a t a from a v a r i e t y of i n s u l a t i o n diagnoses on two of t h e c h a r a c t e r i s t i c v a l u e s obtained with low a p p l i e d v o l t a g e , nondet e r i o r a t e d i n s u l a t i o n c h a r a c t e r i s t i c s stemming from t h e i n i t i a l v a l u e COI of c a p a c i t a n c e Co below t h e discharge v o l t a g e and Cox, y i e l d (CoI/Cox -1) and t h e r a t i o Rw/RD with res p e c t t o t h e d e t e r i o r a t e d i n s u l a t i o n v o l t a g e . These q u a n t i t i e s are necessary f o r i n s u l at i o n d i a g n o s t i c s . Several r e p o r t s have been published on a motorette c l o s e i n s i z e t o t h e a c t u a l apparatus. These r e p o r t s d e a l mainly with t h e e v a l u a t i o n test, a simple thermal degradat i o n t e s t using t h e model b a r c o i l and the bending f a t i g u e t e s t . 11 2. Sample and T e s t i n g Method 2 . 1 Mechanical e v a l u a t i o n test u t i l i z -This i s a g e n e r a l test t o determine t h e thermal p r o p e r t i e s of t h e i n s u l a t i o n system. Table 1 l i s t s t h e i n s u l a t i o n materials (A, B y C, D) i n t h e a c t u a l s y s t e m ( 1 2 p o l e -3 . 3 k V -200 kW), which h a s a m o t o r e t t e corresponding t o a divided s t a t o r (divided i n t o 8 p a r t s ) . The appearance of t h e m o t o r e t t e and t h e c r...

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Critical Examination of the Dissipation Factor Tip-Up as a Measure of Partial Discharge Intensity

Cited by 14 publications

References 6 publications

Evidence and presumption in PD diagnostics

Evidence and presumption in PD diagnostics

A new AC current testing method for nondestructive insulation test

An insulation diagnostic method for high‐voltage rotating machine coils with low applied voltage

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