jept Journal of Energy and Power Technology J Energy Power Technol 2690-1692 2690-1692 LIDSEN Publishing Inc. jept-08-03-013 10.21926/jept.2603013 Correction Correction: Zhang D. Operation of AC Microgrids with PV Panels' Output Power Curtailment for Minimizing the Use of Energy Storage. Journal of Energy and Power Technology 2022; 4: 008 Zhang Daming * University of New South Wales, Sydney, Australia; E-Mail: daming.zhang@unsw.edu.au Dufo-López Rodolfo Academic Editor Correspondence: Daming Zhang; E-Mail: daming.zhang@unsw.edu.au 23 08 2026 8 3 013 11 08 2026 11 08 2026 © 2026 by the authors. 2026 This is an open access article distributed under the conditions of the Creative Commons by Attribution License, which permits unrestricted use, distribution, and reproduction in any medium or format, provided the original work is correctly cited.

The author wishes to make the following corrections to the paper [1]. The results shown in Figure 5 through Figure 8 in the paper are based on the corrected formulas and expressions.

Replace:

The design of the control parameters Kp, Ki and K for the inverter is accomplished by using Eqns. (4) through (10) derived from the control flow in Figure 4a and Figure 4b.

(4) i 2 abc Δ i 2 abc ∗ = K ⋅ ( s C 1 ) ⋅ ( s R d C 1 + 1 ) ⋅ BPFilterDen DEN 1 + DEN 2 + DEN 3 + DEN 4 + DEN 5

where

(5) DEN 1 = [ sC 1 ⋅ ( sL 2 + R 2 ) + ( sR d C 1 + 1 ) ] ⋅ ( sL 1 + R 1 ) ⋅ BPFilterDen ⋅ sC 1 (6) DEN 2 = K ⋅ BPFilterNum ⋅ sC 1 ⋅ [ sC 1 ⋅ ( sL 2 + R 2 ) + ( sR d C 1 + 1 ) ] (7) DEN 3 = ( sR d C 1 + 1 ) ⋅ BPFilterDen ⋅ [ sC 1 ⋅ ( sL 2 + R 2 ) + ( sR d C 1 + 1 ) ] (8) DEN 4 = K ⋅ BPFilterNum ⋅ sC 1 ⋅ ( sR d C 1 + 1 ) (9) DEN 5 = BPFilterDen ⋅ ( sR d C 1 + 1 ) 2

For notch-filter based bandpass filter,

(10) BPFilterNum = k d ⋅ b n s (11) BPFilterDen = s 2 + b n s + ω m 2

For lowpass plus highpass filter,

(12) BPFilterNum = k d ⋅ s ⋅ LPCoeff 2 (13) BPFilterDen = ( s + HPCoeff ) ⋅ ( s 2 + LPCoeff 1 ⋅ s + LPCoeff 2 )

The capacitor current active damping is considered by applying kd as shown in (10) and (12).

For the closed-loop transfer function, one can use Matlab command to work it out. That is to say

(14) i 2 abc i 2 abc ∗ = feedback ( i 2 abc Δ i 2 abc ∗ , Low, Pass, Filter )

where the lowpass filter is the second order butterworth filter with a cut-off frequency of switching frequency 5 kHz, which can be slightly higher. In practice, the function of such a filter can be replaced by choosing small Kp in proportional resonant controller as small Kp can reduce the influence of DC component in i2 and PR controller can also effectively remove high-frequency noise in i2.

with:

The design of the control parameters Kp, Ki and K for the inverter is accomplished by using Eqns. (4) through (10) derived from the control flow in Figure 4a and Figure 4b.

(4) i 2 abc i ∗ = K ⋅ ( s C 1 ) ⋅ ( sR d C 1 + 1 ) ⋅ BPFilterDen DEN 1 + DEN 2 + DEN 3 + DEN 4 + DEN 5

where

(5) DEN 1 = [ sC 1 ⋅ ( sL 2 + R 2 ) + ( sR d C 1 + 1 ) ] ⋅ ( sL 1 + R 1 ) ⋅ BPFilterDen ⋅ sC 1 (6) DEN 2 = K ⋅ BPFilterNum ⋅ sC 1 ⋅ [ sC 1 ⋅ ( sL 2 + R 2 ) + ( sR d C 1 + 1 ) ] (7) DEN 3 = ( sR d C 1 + 1 ) ⋅ BPFilterDen ⋅ [ sC 1 ⋅ ( sL 2 + R 2 ) + ( sR d C 1 + 1 ) ] (8) DEN 4 = − K ⋅ BPFilterNum ⋅ sC 1 ⋅ ( sR d C 1 + 1 ) (9) DEN 5 = − BPFilterDen ⋅ ( sR d C 1 + 1 ) 2

For notch-filter based bandpass filter,

(10) BPFilterNum = k d ⋅ b n s (11) BPFilterDen = s 2 + b n s + ω m 2

For lowpass plus highpass filter,

(12) BPFilterNum = k d ⋅ s ⋅ LPCoeff 2 (13) BPFilterDen = ( s + HPCoeff ) ⋅ ( s 2 + LPCoeff 1 ⋅ s + LPCoeff 2 )

The capacitor current active damping is considered by applying kd as shown in (10) and (12).

For the closed-loop transfer function, one can use Matlab command to work it out. That is to say

(14) i 2 abc i 2 abc ∗ = feedback [ i 2 abc i ∗ × ( K p + K i s s 2 + ω 0 2 ) , Low, Pass, Filter ]

where the lowpass filter is the second order butterworth filter with a cut-off frequency of switching frequency 5 kHz, which can be slightly higher. In practice, the function of such a filter can be replaced by choosing small Kp in proportional resonant controller as small Kp can reduce the influence of DC component in i2 and PR controller can also effectively remove high-frequency noise in i2.

Competing Interests

The author has declared that no competing interest exists.

 References ZhangD. Operation of AC microgrids with PV panels' output power curtailment for minimizing the use of energy storage. J Energy Power Technol. 2022; 4: 008.