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Table 7 Case study 3: average percentage errors

From: Some advanced parametric methods for assessing waveform distortion in a smart grid with renewable generation

 

Fundamental

74.79 Hz

5th

382.35 Hz

38th

(a) Average errors of frequency [%]

     

SWEM

1.18 × 10−4

0.0036

9.24 × 10−4

0.0041

3.75 × 10−5

SWPM

7.84 × 10−5

0.0013

4.35 × 10−4

0.0015

2.39 × 10−5

SWEDEM

0.0056

0.0063

0.0042

0.0028

0.0042

SWPDPM

9.37 × 10−5

0.0025

1.60 × 10−5

0.0019

1.60 × 10−5

SWMEM

3.88 × 10−4

0.0041

0.0028

0.021

5.18 × 10−5

SWMPM

0.0016

0.011

0.11

0.12

3.69 × 10−4

IECM

0.04

0.28

0.04

0.64

0.04

(b) Average errors of amplitude [%]

     

SWEM

0.0019

0.059

0.066

0.48

0.026

SWPM

0.0012

0.039

0.035

0.22

0.028

SWEDEM

0.19

2.80

2.01

0.43

0.25

SWPDPM

0.19

2.77

2.09

0.36

0.077

SWMEM

0.0014

0.027

0.20

0.89

0.011

SWMPM

0.0058

1.16

1.50

7.34

0.041

IECM

0.10

3.41

2.15

31.48

3.12

  1. Estimation of the average percentage errors of the fundamental, harmonic components, and interharmonics obtained by SWEM, SWPM, SWEDEM, SWPDEPM, SWMEM, SWMPM, and IECM: (a) frequencies; (b) amplitudes.