Class information for:
Level 1: FREQUENCY ESTIMATION//INTERHARMONICS//HARMONIC ESTIMATION

Basic class information
Class id #P Avg. number of
references		 Database coverage
of references
8684 1228 20.1 55%


Bar chart of Publication_year

Last years might be incomplete

Hierarchy of classes
The table includes all classes above and classes immediately below the current class.


Cluster id Level Cluster label #P
24 4 ENGINEERING, ELECTRICAL & ELECTRONIC//IEEE TRANSACTIONS ON POWER SYSTEMS//IEEE TRANSACTIONS ON POWER ELECTRONICS 122956
125 3       IEEE TRANSACTIONS ON POWER SYSTEMS//IEEE TRANSACTIONS ON POWER ELECTRONICS//ENGINEERING, ELECTRICAL & ELECTRONIC 67681
1500 2             POWER QUALITY//HARMONICS//IEEE TRANSACTIONS ON POWER DELIVERY 7562
8684 1                   FREQUENCY ESTIMATION//INTERHARMONICS//HARMONIC ESTIMATION 1228

Terms with highest relevance score


rank Term termType Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 FREQUENCY ESTIMATION authKW 531683 10% 18% 119
2 INTERHARMONICS authKW 362075 3% 39% 37
3 HARMONIC ESTIMATION authKW 309505 2% 66% 19
4 GRID SYNCHRONIZATION authKW 268785 2% 54% 20
5 POWER QUALITY authKW 246666 11% 7% 137
6 FREQUENCY MEASUREMENT authKW 235698 4% 22% 43
7 POWER SYSTEM HARMONICS authKW 230685 4% 20% 46
8 POWER SYSTEM FREQUENCY authKW 214894 1% 79% 11
9 SYNCHROPHASOR authKW 205490 2% 36% 23
10 MOVING AVERAGE FILTER MAF authKW 201399 1% 90% 9

Web of Science journal categories


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with term
in class
1 Engineering, Electrical & Electronic 31855 92% 0% 1124
2 Instruments & Instrumentation 6996 24% 0% 295
3 Automation & Control Systems 1790 8% 0% 101
4 Engineering, General 542 6% 0% 68
5 Computer Science, Interdisciplinary Applications 18 2% 0% 21
6 Computer Science, Artificial Intelligence 18 2% 0% 20
7 Literature, Romance 17 0% 0% 4
8 Computer Science, Information Systems 10 1% 0% 17
9 Computer Science, Hardware & Architecture 10 1% 0% 10
10 Energy & Fuels 5 2% 0% 20

Address terms


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 ABADAN BRANCH 79548 1% 27% 12
2 PISTON ENGINES DESIGN 49729 0% 100% 2
3 RUMENTAC CONTROL 29593 0% 24% 5
4 AUSTRALIAN ENERGY 26484 1% 12% 9
5 ABB UTILITIES 24864 0% 100% 1
6 AI POWER SYST GRP 24864 0% 100% 1
7 ATCO ELECT 24864 0% 100% 1
8 BELGIAN GRID 24864 0% 100% 1
9 COMMUN OPT IICO 24864 0% 100% 1
10 COMP SCI ELECT TELOCOMMINICAT 24864 0% 100% 1

Journals


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class
1 IEEE TRANSACTIONS ON POWER DELIVERY 142389 17% 3% 209
2 IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 71781 13% 2% 160
3 ELECTRIC POWER SYSTEMS RESEARCH 27309 6% 2% 70
4 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 23161 7% 1% 86
5 IET GENERATION TRANSMISSION & DISTRIBUTION 22847 3% 2% 41
6 IEE PROCEEDINGS-GENERATION TRANSMISSION AND DISTRIBUTION 21140 3% 3% 33
7 IEEE TRANSACTIONS ON POWER ELECTRONICS 15612 5% 1% 65
8 INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS 13102 4% 1% 48
9 INTERNATIONAL TRANSACTIONS ON ELECTRICAL ENERGY SYSTEMS 7988 1% 2% 14
10 IEEE TRANSACTIONS ON SMART GRID 7761 2% 1% 22

Author Key Words


Rank Term Chi square Shr. of publ. in
class containing
term		 Class's shr. of
term's tot. occurrences		 #P with
term in
class		 LCSH search Wikipedia search
1 FREQUENCY ESTIMATION 531683 10% 18% 119 Search FREQUENCY+ESTIMATION Search FREQUENCY+ESTIMATION
2 INTERHARMONICS 362075 3% 39% 37 Search INTERHARMONICS Search INTERHARMONICS
3 HARMONIC ESTIMATION 309505 2% 66% 19 Search HARMONIC+ESTIMATION Search HARMONIC+ESTIMATION
4 GRID SYNCHRONIZATION 268785 2% 54% 20 Search GRID+SYNCHRONIZATION Search GRID+SYNCHRONIZATION
5 POWER QUALITY 246666 11% 7% 137 Search POWER+QUALITY Search POWER+QUALITY
6 FREQUENCY MEASUREMENT 235698 4% 22% 43 Search FREQUENCY+MEASUREMENT Search FREQUENCY+MEASUREMENT
7 POWER SYSTEM HARMONICS 230685 4% 20% 46 Search POWER+SYSTEM+HARMONICS Search POWER+SYSTEM+HARMONICS
8 POWER SYSTEM FREQUENCY 214894 1% 79% 11 Search POWER+SYSTEM+FREQUENCY Search POWER+SYSTEM+FREQUENCY
9 SYNCHROPHASOR 205490 2% 36% 23 Search SYNCHROPHASOR Search SYNCHROPHASOR
10 MOVING AVERAGE FILTER MAF 201399 1% 90% 9 Search MOVING+AVERAGE+FILTER+MAF Search MOVING+AVERAGE+FILTER+MAF

Core articles
The table includes core articles in the class. The following variables is taken into account for the relevance score of an article in a cluster c:
(1) Number of references referring to publications in the class.
(2) Share of total number of active references referring to publications in the class.
(3) Age of the article. New articles get higher score than old articles.
(4) Citation rate, normalized to year.


Rank Reference # ref.
in cl.		 Shr. of ref. in
cl.		 Citations
1 GOLESTAN, S , GUERRERO, JM , VASQUEZ, JC , (2017) THREE-PHASE PLLS: A REVIEW OF RECENT ADVANCES.IEEE TRANSACTIONS ON POWER ELECTRONICS. VOL. 32. ISSUE 3. P. 1894 -1907 77 76% 0
2 GOLESTAN, S , RAMEZANI, M , GUERRERO, JM , FREIJEDO, FD , MONFARED, M , (2014) MOVING AVERAGE FILTER BASED PHASE-LOCKED LOOPS: PERFORMANCE ANALYSIS AND DESIGN GUIDELINES.IEEE TRANSACTIONS ON POWER ELECTRONICS. VOL. 29. ISSUE 6. P. 2750 -2763 33 92% 45
3 SINGH, SN , JAIN, SK , (2011) HARMONICS ESTIMATION IN EMERGING POWER SYSTEM: KEY ISSUES AND CHALLENGES.ELECTRIC POWER SYSTEMS RESEARCH. VOL. 81. ISSUE 9. P. 1754 -1766 62 58% 41
4 NAM, SR , KANG, SH , KANG, SH , (2015) REAL-TIME ESTIMATION OF POWER SYSTEM FREQUENCY USING A THREE-LEVEL DISCRETE FOURIER TRANSFORM METHOD.ENERGIES. VOL. 8. ISSUE 1. P. 79 -93 36 95% 3
5 CHEN, CI , CHEN, YC , (2014) COMPARATIVE STUDY OF HARMONIC AND INTERHARMONIC ESTIMATION METHODS FOR STATIONARY AND TIME-VARYING SIGNALS.IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS. VOL. 61. ISSUE 1. P. 397-404 34 85% 27
6 REZA, MS , CIOBOTARU, M , AGELIDIS, VG , (2014) DIFFERENTIATION FILTER-BASED TECHNIQUE FOR ROBUST ESTIMATION OF SINGLE-PHASE GRID VOLTAGE FREQUENCY UNDER DISTORTED CONDITIONS.IET GENERATION TRANSMISSION & DISTRIBUTION. VOL. 8. ISSUE 5. P. 907 -915 40 89% 0
7 XIA, YL , BLAZIC, Z , MANDIC, DP , (2015) COMPLEX-VALUED LEAST SQUARES FREQUENCY ESTIMATION FOR UNBALANCED POWER SYSTEMS.IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT. VOL. 64. ISSUE 3. P. 638 -648 37 90% 2
8 JAALAM, N , RAHIM, NA , BAKAR, AHA , TAN, C , HAIDAR, AMA , (2016) A COMPREHENSIVE REVIEW OF SYNCHRONIZATION METHODS FOR GRID-CONNECTED CONVERTERS OF RENEWABLE ENERGY SOURCE.RENEWABLE & SUSTAINABLE ENERGY REVIEWS. VOL. 59. ISSUE . P. 1471 -1481 53 62% 0
9 GOLESTAN, S , RAMEZANI, M , GUERRERO, JM , MONFARED, M , (2015) DQ-FRAME CASCADED DELAYED SIGNAL CANCELLATION-BASED PLL: ANALYSIS, DESIGN, AND COMPARISON WITH MOVING AVERAGE FILTER-BASED PLL.IEEE TRANSACTIONS ON POWER ELECTRONICS. VOL. 30. ISSUE 3. P. 1618 -1632 27 93% 19
10 REZA, MS , AGELIDIS, VG , (2015) A ROBUST TECHNIQUE FOR SINGLE-PHASE GRID VOLTAGE FUNDAMENTAL AND HARMONIC PARAMETER ESTIMATION.IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT. VOL. 64. ISSUE 12. P. 3262 -3273 41 72% 1

Classes with closest relation at Level 1


Rank Class id link
1 14112 POWER QUALITY//POWER QUALITY DISTURBANCES//S TRANSFORM
2 3162 ACTIVE POWER FILTER//ACTIVE FILTERS//ACTIVE POWER FILTER APF
3 14063 HARMONICS//POWER SYSTEM HARMONICS//IEEE TRANSACTIONS ON POWER DELIVERY
4 10450 FREQUENCY ESTIMATION//ADC TESTING//NONCOHERENT SAMPLING
5 37514 BBDF MATRIX//ARCHIV FUR ELEKTROTECHNIK//LEHRSTUHL ELEKTR ENERGIEVERSORGUNG
6 21392 ISLANDING DETECTION//ISLANDING//NON DETECTION ZONE
7 17679 VOLTAGE FLICKER//ELECTRIC ARC FURNACE//FLICKERMETER
8 9139 PHASOR MEASUREMENT UNIT//POWER SYSTEM STATE ESTIMATION//STATE ESTIMATION
9 4797 LCL FILTER//CURRENT CONTROL//GRID CONNECTED INVERTER
10 12425 VOLTAGE SAG//DYNAMIC VOLTAGE RESTORER DVR//DYNAMIC VOLTAGE RESTORER

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