Power factor correction control method, apparatus, and device, and storage medium
View Patent ↗Disclosed are a Power Factor Correction (PFC) control method, apparatus, and device, and a computer-readable storage medium. The method includes: acquiring an input voltage value, input current value, and output voltage value from a PFC circuit (S 101 ); acquiring a current reference value for current loop control by using a Prony's method according to the input voltage value, the output voltage value, and a preset voltage reference value (S 102 ); and performing current loop control according to the current reference value and the input current value, and outputting a corresponding Pulse Width Modulation (PWM) signal, so as to control a switch tube in the PFC circuit to be correspondingly switched on or switched off (S 103 ).
1. A Power Factor Correction (PFC) control method, comprising:
acquiring an input voltage value, an input current value, and an output voltage value from a PFC circuit;
obtaining a current reference value for current loop control by using a Prony's method according to the input voltage value, the output voltage value, and a preset voltage reference value; and
performing current loop control according to the current reference value and the input current value, and outputting a corresponding Pulse Width Modulation (PWM) signal, so as to control switch transistors in the PFC circuit to be correspondingly switched on or switched off;
wherein the obtaining the current reference value for current loop control by using the Prony's method according to the input voltage value, the output voltage value, and the preset voltage reference value comprises:
performing voltage loop control according to the input voltage value, the output voltage value, and the preset voltage reference value to obtain an original current reference value;
calculating an angular frequency by using the Prony's method according to the original current reference value; and
estimating an original current reference value at a next sampling moment of a present sampling moment according to the angular frequency and the original current reference value, and determining the estimated original current reference value as the current reference value.
2. The PFC control method according to claim 1 , wherein the calculating the angular frequency by using the Prony's method according to the original current reference value comprises:
calculating the angular frequency by using
ω
=
1
T
s
cos
-
1
{
∑
m
-
2
M
-
1
[
g
(
m
-
1
)
+
g
(
m
+
1
)
]
2
2
∑
m
-
2
M
-
1
g
m
[
g
(
m
-
1
)
+
g
(
m
+
1
)
]
}
according to the original current reference value, wherein ω represents the angular frequency, M represents a number of the original current reference value, g m represents an original current reference value at a sampling moment m, g (m−1) and g (m+1) represent original current reference values at a previous sampling moment and next sampling moment of the sampling moment m respectively, g (M) represents the original current reference value at the present sampling moment, and Ts represents a sampling period.
3. The PFC control method according to claim 1 , wherein the performing voltage loop control according to the input voltage value, the output voltage value, and the preset voltage reference value to obtain the original current reference value comprises:
performing voltage loop control according to the output voltage value and the preset voltage reference value to obtain a first control voltage;
performing feed-forward loop control according to the input voltage value to obtain a second control voltage; and
generating the original current reference value according to the first control voltage and the second control voltage.
4. The PFC control method according to claim 1 , wherein the original current reference value is the original current reference value at the present sampling moment and original current reference values at multiple sampling moments closest to the present sampling moment.
5. A Power Factor Correction (PFC) control device, comprising:
a memory, configured to store a computer program; and
a processor, configured to execute the computer program to implement operations comprising:
acquiring an input voltage value, an input current value, and an output voltage value from a PFC circuit;
obtaining a current reference value for current loop control by using a Prony's method according to the input voltage value, the output voltage value, and a preset voltage reference value; and
performing current loop control according to the current reference value and the input current value, and outputting a corresponding Pulse Width Modulation (PWM) signal, so as to control switch transistors in the PFC circuit to be correspondingly switched on or switched off;
wherein the obtaining the current reference value for current loop control by using the Prony's method according to the input voltage value, the output voltage value, and the preset voltage reference value comprises:
performing voltage loop control according to the input voltage value, the output voltage value, and the preset voltage reference value to obtain an original current reference value;
calculating an angular frequency by using the Prony's method according to the original current reference value; and
estimating an original current reference value at a next sampling moment of a present sampling moment according to the angular frequency and the original current reference value, and determining the estimated original current reference value as the current reference value.
6. The PFC control device according to claim 5 , wherein the calculating the angular frequency by using the Prony's method according to the original current reference value comprises:
calculating the angular frequency by using
ω
=
1
T
s
cos
-
1
{
∑
m
-
2
M
-
1
[
g
(
m
-
1
)
+
g
(
m
+
1
)
]
2
2
∑
m
-
2
M
-
1
g
m
[
g
(
m
-
1
)
+
g
(
m
+
1
)
]
}
according to the original current reference value, wherein ω represents the angular frequency, M represents a number of the original current reference value, g m represents an original current reference value at a sampling moment m, g (m−1) and g (m+1) represent original current reference values at a previous sampling moment and next sampling moment of the sampling moment m respectively, g (M) represents the original current reference value at the present sampling moment, and Ts represents a sampling period.
7. The PFC control device according to claim 5 , wherein the performing voltage loop control according to the input voltage value, the output voltage value, and the preset voltage reference value to obtain the original current reference value comprises:
performing voltage loop control according to the output voltage value and the preset voltage reference value to obtain a first control voltage;
performing feed-forward loop control according to the input voltage value to obtain a second control voltage; and
generating the original current reference value according to the first control voltage and the second control voltage.
8. The PFC control device according to claim 5 , wherein the original current reference value is the original current reference value at the present sampling moment and original current reference values at multiple sampling moments closest to the present sampling moment.
9. A non-transitory computer-readable storage medium, storing a computer program that is executed by a processor to implement operations comprising:
acquiring an input voltage value, an input current value, and an output voltage value from a PFC circuit;
obtaining a current reference value for current loop control by using a Prony's method according to the input voltage value, the output voltage value, and a preset voltage reference value; and
performing current loop control according to the current reference value and the input current value, and outputting a corresponding Pulse Width Modulation (PWM) signal, so as to control switch transistors in the PFC circuit to be correspondingly switched on or switched off;
wherein the obtaining the current reference value for current loop control by using the Prony's method according to the input voltage value, the output voltage value, and the preset voltage reference value comprises:
performing voltage loop control according to the input voltage value, the output voltage value, and the preset voltage reference value to obtain an original current reference value;
calculating an angular frequency by using the Prony's method according to the original current reference value; and
estimating an original current reference value at a next sampling moment of a present sampling moment according to the angular frequency and the original current reference value, and determining the estimated original current reference value as the current reference value.
10. The non-transitory computer-readable storage medium according to claim 9 , wherein the calculating the angular frequency by using the Prony's method according to the original current reference value comprises:
calculating the angular frequency by using
ω
=
1
T
s
cos
-
1
{
∑
m
-
2
M
-
1
[
g
(
m
-
1
)
+
g
(
m
+
1
)
]
2
2
∑
m
-
2
M
-
1
g
m
[
g
(
m
-
1
)
+
g
(
m
+
1
)
]
}
according to the original current reference value, wherein ω represents the angular frequency, M represents a number of the original current reference value, g m represents an original current reference value at a sampling moment m, g (m−1) and g (m+1) represent original current reference values at a previous sampling moment and next sampling moment of the sampling moment m respectively, g (M) represents the original current reference value at the present sampling moment, and Ts represents a sampling period.
11. The non-transitory computer-readable storage medium according to claim 9 , wherein the performing voltage loop control according to the input voltage value, the output voltage value, and the preset voltage reference value to obtain the original current reference value comprises:
performing voltage loop control according to the output voltage value and the preset voltage reference value to obtain a first control voltage;
performing feed-forward loop control according to the input voltage value to obtain a second control voltage; and
generating the original current reference value according to the first control voltage and the second control voltage.
12. The non-transitory computer-readable storage medium according to claim 9 , wherein the original current reference value is the original current reference value at the present sampling moment and original current reference values at multiple sampling moments closest to the present sampling moment.