CN116520933A - Boost system control method based on MPPT tracking range - Google Patents
Boost system control method based on MPPT tracking range Download PDFInfo
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Abstract
The application relates to the technical field of photovoltaic modules, in particular to a boost system control method based on an MPPT tracking range. Comprising the following steps: establishing a photovoltaic module peak power model according to historical operation data of the photovoltaic module; acquiring a real-time operation value of the photovoltaic module, generating real-time peak power of the photovoltaic module according to the real-time operation value of the photovoltaic module and a peak power model of the photovoltaic module, and setting working parameters of a boosting system; presetting a correction time node, acquiring environmental parameters according to the correction time node, and correcting the real-time peak power of the photovoltaic module and the working parameters of the boosting system according to the environmental parameters. By dynamically adjusting control parameters of the boosting system, the output voltage of the photovoltaic module is timely compensated, the generating capacity of the whole system is improved, the system cost is reduced, and the MPPT voltage range of the solar panel group string is widened.
Description
Technical Field
The application relates to the technical field of photovoltaic modules, in particular to a boost system control method based on an MPPT tracking range.
Background
Solar photovoltaic power generation is an important form of solar energy utilization, is a power generation mode of converting light energy into electric energy by adopting a solar cell, and along with continuous progress of technology, a photovoltaic cell is one of the most promising power generation technologies. The basic principle of a solar cell is the photovoltaic effect of a semiconductor, namely, the phenomenon of generating photovoltage under the irradiation of sunlight.
In a photovoltaic power generation system, the utilization rate of a photovoltaic cell is affected by factors such as the use environment, e.g., the illumination intensity, the load, and the temperature, in addition to the internal characteristics of the photovoltaic cell. Under different external conditions, the photovoltaic cells can operate at different and unique maximum power points (MaximumPowerPoint, MPP). In order to improve the energy conversion efficiency of photovoltaic power generation as much as possible, the photovoltaic cell always keeps the maximum power output under the condition of continuously changing the application environment, and the maximum power tracking (MPPT) technology of a photovoltaic power generation system is generated. Through maximum power tracking, the output power of the photovoltaic cell can be maximized, and the utilization efficiency of the photovoltaic cell is greatly improved. Therefore, research on the photovoltaic maximum power tracking control technology has become one of the hot spots in the photovoltaic power generation field.
Disclosure of Invention
The purpose of the present application is: the application provides a boost system control method based on an MPPT tracking range. The method aims at improving the overall power generation capacity of the photovoltaic module and reducing the operation cost.
In some embodiments of the present application, a boosting device of an MPPT tracking range of a grid-connected inverter is set, and a low-power isolated DC-DC boosting device is connected in series with a solar panel string, so that a group MPPT voltage range of the solar panel string is widened, when the open-circuit voltage of a panel is higher, and when the maximum power point voltage ompp is more than ubuscin, the boosting compensation device is not started, and system loss is reduced; when the open-circuit voltage of the battery plate is lower and cannot meet the condition that the maximum power point voltage is larger than Ubusmin, the boost compensation device is started, and the grid-connected inverter can always work at the maximum power point voltage Umpp of the battery assembly.
In some embodiments of the application, the control parameters of the boosting system are dynamically adjusted to timely compensate the output voltage of the photovoltaic module, so that the generating capacity of the whole system is improved, the system cost is reduced, and the MPPT voltage range of the solar panel group string is widened.
In some embodiments of the present application, a boost system control method based on an MPPT tracking range is provided, including:
establishing a photovoltaic module peak power model according to historical operation data of the photovoltaic module;
acquiring a real-time operation value of a photovoltaic module, generating real-time peak power of the photovoltaic module according to the real-time operation value of the photovoltaic module and the peak power model of the photovoltaic module, and setting working parameters of a boosting system;
presetting a correction time node, acquiring environmental parameters according to the correction time node, and correcting the real-time peak power of the photovoltaic module and the working parameters of the boosting system according to the environmental parameters.
In some embodiments of the present application, when setting the operating parameters of the boost system, the method includes:
generating a maximum output voltage U1 according to the real-time peak power of the photovoltaic module;
acquiring a real-time output voltage U2 of the photovoltaic module;
if U2 is less than U1, setting a compensation voltage U according to the difference between the maximum output voltage U1 and the real-time output voltage U2;
and setting a compensation voltage boosting speed v according to the compensation voltage u.
In some embodiments of the present application, when setting the compensation voltage boost speed v according to the compensation voltage u, the method further includes:
presetting a compensation voltage matrix U, and setting U (U1, U2, U3 and U4), wherein U1 is preset first compensation voltage, U2 is preset second compensation voltage, U3 is preset third compensation voltage, U4 is preset fourth compensation voltage, and U1 is more than U2 and less than U3 and more than U4;
presetting a compensation voltage boosting speed matrix V, and setting V (V1, V2, V3 and V4), wherein V1 is a preset first compensation voltage boosting speed, V2 is a preset second compensation voltage boosting speed, V3 is a preset third compensation voltage boosting speed, and V4 is a preset fourth compensation voltage boosting speed;
if U is less than U1, setting the compensation voltage boosting speed V as a preset first compensation voltage boosting speed V1, namely v=v1;
if U1 is less than U2, setting the compensation voltage boost speed V to be a preset second compensation voltage boost speed V2, namely v=v2;
if U2 is less than U3, setting the compensation voltage boost speed V to be a preset third compensation voltage boost speed V3, namely v=v3;
if U3 < U4, the compensation voltage boost speed V is set to be the preset fourth compensation voltage boost speed V4, i.e., v=v4.
In some embodiments of the present application, when correcting the real-time peak power of the photovoltaic module according to the environmental parameter, the method includes:
acquiring real-time solar irradiance a1 according to the environmental parameter;
acquiring solar irradiance a2 of the last correction time node;
generating a solar irradiance variation value a according to the absolute value of the difference value of the a1 and the a2;
presetting a solar irradiance variation value threshold;
if a1 is less than a2,
when the solar irradiance variation value a is smaller than the solar irradiance variation value threshold, not correcting the real-time peak power of the photovoltaic module;
when the solar irradiance variation value a is larger than the solar irradiance variation value threshold, correcting the real-time peak power of the photovoltaic module according to the solar irradiance variation value a and the photovoltaic module peak power model;
if a1 > a2;
and correcting the real-time peak power of the photovoltaic module according to the solar irradiance variation value a and the peak power model of the photovoltaic module.
In some embodiments of the present application, when correcting the operating parameter of the boost system according to the environmental parameter, the method includes:
obtaining the peak power of the photovoltaic module of the current correction time node;
generating a compensation voltage u1 of the current correction time node and acquiring a compensation voltage u2 of the previous correction time node;
if u2=0, the compensation voltage boosting speed v is set according to the compensation voltage u1 of the current correction time node.
In some embodiments of the present application, when correcting the operating parameter of the boost system according to the environmental parameter, the method includes:
if u2 > 0, generating a compensation voltage variation value b according to the compensation voltage u1 of the current correction time node and the compensation voltage u2 of the previous correction time node, and setting a compensation voltage correction speed c according to the compensation voltage variation value b.
In some embodiments of the present application, when setting the compensation voltage correction speed c according to the compensation voltage variation value b, the method includes:
presetting a compensation voltage variation value matrix B, and setting B (B1, B2, B3 and B4), wherein B1 is a preset first compensation voltage variation value, B2 is a preset second compensation voltage variation value, B3 is a preset third compensation voltage variation value, B4 is a preset fourth compensation voltage variation value, and B1 is more than B2 and less than B3 and less than B4;
presetting a compensation voltage correction speed matrix C, and setting C (C1, C2, C3 and C4), wherein C1 is a preset first compensation voltage correction speed, C2 is a preset second compensation voltage correction speed, C3 is a preset third compensation voltage correction speed, C4 is a preset fourth compensation voltage correction speed, and C1 is more than C2 and less than C3 and less than C4;
if B1 is less than B2, setting the compensation voltage correction speed C to be a preset first compensation voltage correction speed C1, i.e. c=c1;
if B2 is less than B3, setting the compensation voltage correction speed C to be a preset second compensation voltage correction speed C2, namely c=c2;
if B3 is less than B4, setting the compensation voltage correction speed C to be a preset third compensation voltage correction speed C3, namely c=c3;
if B > B4, the compensation voltage correction speed C is set to a preset fourth compensation voltage correction speed C4, i.e., c=c4.
In some embodiments of the present application, when correcting the working parameters of the boost system according to the environmental parameters, the method further includes:
acquiring a solar irradiance variation value a and a compensation voltage variation value b;
setting a time interval t of a next correction time node according to the solar irradiance variation value a;
and setting a correction coefficient n to correct the time interval t according to the compensation voltage variation value b.
In some embodiments of the present application, when setting the time interval t of the next correction time node, the method includes:
presetting a time interval matrix T, and setting T (T1, T2, T3 and T4), wherein T1 is a preset first time interval, T2 is a preset second time interval, T3 is a preset third time interval, T4 is a preset fourth time interval, and T1 is more than T2 and less than T3 and less than T4;
presetting a solar irradiance variation value matrix A, and setting A (A1, A2, A3 and A4), wherein A1 is a preset first solar irradiance variation value, A2 is a preset second solar irradiance variation value, A3 is a preset third solar irradiance variation value, A4 is a preset fourth solar irradiance variation value, and A1 is less than A2 and less than A3 and less than A4;
if A1 is less than a < A2, the set time interval T is a preset first time interval T1, i.e., t=t1;
if A2 is less than a < A3, the set time interval T is a preset second time interval T2, i.e. t=t2;
if A3 is less than a < A4, the set time interval T is a preset third time interval T3, i.e., t=t3;
if a > A4, the set time interval T is a preset fourth time interval T4, i.e., t=t4.
In some embodiments of the present application, when setting the correction coefficient n to correct the time interval t according to the compensation voltage variation value b, the method includes:
presetting a correction coefficient matrix N, and setting N (N1, N2, N3, N4), wherein N1 is a preset first correction coefficient, N2 is a preset second correction coefficient, N3 is a preset third correction coefficient, N4 is a preset fourth correction coefficient, and N1 is more than N2 and less than N3 and less than N4 and less than 1;
if B1 is less than B2, setting n=n4, and correcting the time interval t=n4+Ti;
if B2 is less than B3, setting n=n3, and correcting the time interval t=n3+Ti;
if B3 is less than B4, setting n=n2, and correcting the time interval t=n2+Ti;
if B > B4, n=n1 is set and the corrected time interval t=n1×Ti.
Compared with the prior art, the boost system control method based on the MPPT tracking range has the beneficial effects that:
by setting the boosting device of the MPPT tracking range of the grid-connected inverter, the low-power isolation DC-DC boosting device is connected with the solar panel group string in series, so that the group MPPT voltage range of the solar panel group string is widened, when the open circuit voltage of the panel is higher, the boosting compensation device is not started when the maximum power point voltage Umpp is more than Ubusmin, and the system loss is reduced; when the open-circuit voltage of the battery plate is lower and cannot meet the condition that the maximum power point voltage is larger than Ubusmin, the boost compensation device is started, and the grid-connected inverter can always work at the maximum power point voltage Umpp of the battery assembly.
By dynamically adjusting control parameters of the boosting system, the output voltage of the photovoltaic module is timely compensated, the generating capacity of the whole system is improved, the system cost is reduced, and the MPPT voltage range of the solar panel group string is widened.
Drawings
Fig. 1 is a flowchart of a boost system control method based on an MPPT tracking range in a preferred embodiment of the present application.
Detailed Description
The detailed description of the present application is further described in detail below with reference to the drawings and examples. The following examples are illustrative of the present application, but are not intended to limit the scope of the present application.
In the description of the present application, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
As shown in fig. 1, a boost system control method based on an MPPT tracking range according to a preferred embodiment of the present application includes:
s101: establishing a photovoltaic module peak power model according to historical operation data of the photovoltaic module;
s102: acquiring a real-time operation value of the photovoltaic module, generating real-time peak power of the photovoltaic module according to the real-time operation value of the photovoltaic module and a peak power model of the photovoltaic module, and setting working parameters of a boosting system;
s103: presetting a correction time node, acquiring environmental parameters according to the correction time node, and correcting the real-time peak power of the photovoltaic module and the working parameters of the boosting system according to the environmental parameters.
Specifically, when setting the operation parameters of the booster system, the method includes:
generating a maximum output voltage U1 according to the real-time peak power of the photovoltaic module;
acquiring a real-time output voltage U2 of the photovoltaic module;
if U2 is less than U1, setting a compensation voltage U according to the difference between the maximum output voltage U1 and the real-time output voltage U2;
the compensation voltage boost speed v is set based on the compensation voltage u.
Specifically, a boosting device of an MPPT tracking range of the grid-connected inverter is arranged, and a low-power isolation DC-DC boosting device is connected with the solar panel group string in series, so that the MPPT voltage range of the solar panel group string is widened;
specifically, when the open circuit voltage of the battery plate is higher and the maximum power point voltage Umpp is more than Ubusmin, the boost compensation device is not started, so that the system loss is reduced; when the open-circuit voltage of the battery plate is lower and cannot meet the condition that the maximum power point voltage is larger than Ubusmin, the boost compensation device is started, and the grid-connected inverter can always work at the maximum power point voltage Umpp of the battery assembly.
Specifically, when the compensation voltage boosting rate v is set based on the compensation voltage u, the method further includes:
presetting a compensation voltage matrix U, and setting U (U1, U2, U3 and U4), wherein U1 is preset first compensation voltage, U2 is preset second compensation voltage, U3 is preset third compensation voltage, U4 is preset fourth compensation voltage, and U1 is more than U2 and less than U3 and more than U4;
presetting a compensation voltage boosting speed matrix V, and setting V (V1, V2, V3 and V4), wherein V1 is a preset first compensation voltage boosting speed, V2 is a preset second compensation voltage boosting speed, V3 is a preset third compensation voltage boosting speed, and V4 is a preset fourth compensation voltage boosting speed;
if U is less than U1, setting the compensation voltage boosting speed V as a preset first compensation voltage boosting speed V1, namely v=v1;
if U1 is less than U2, setting the compensation voltage boost speed V to be a preset second compensation voltage boost speed V2, namely v=v2;
if U2 is less than U3, setting the compensation voltage boost speed V to be a preset third compensation voltage boost speed V3, namely v=v3;
if U3 < U4, the compensation voltage boost speed V is set to be the preset fourth compensation voltage boost speed V4, i.e., v=v4.
It can be understood that in the above embodiment, by setting the compensation voltage boost speed matrix, the compensation voltage is dynamically adjusted in a grading manner, so that the power generation of the photovoltaic module is ensured to be always kept at a peak value, and the power generation capacity of the whole system is improved.
In a preferred embodiment of the present application, when correcting the real-time peak power of the photovoltaic module according to the environmental parameter, the method includes:
acquiring real-time solar irradiance a1 according to the environmental parameter;
acquiring solar irradiance a2 of the last correction time node;
generating a solar irradiance variation value a according to the absolute value of the difference value of a1 and a2;
presetting a solar irradiance variation value threshold;
if a1 is less than a2,
when the solar irradiance variation value a is smaller than the solar irradiance variation value threshold, the real-time peak power of the photovoltaic module is not corrected;
when the solar irradiance variation value a is larger than the solar irradiance variation value threshold, correcting the real-time peak power of the photovoltaic module according to the solar irradiance variation value a and the photovoltaic module peak power model;
if a1 > a2;
and correcting the real-time peak power of the photovoltaic module according to the solar irradiance variation value a and the peak power model of the photovoltaic module.
Specifically, in the above embodiment, the real-time peak power is adjusted by obtaining the solar irradiance variation value and setting the solar irradiance variation value threshold, and when the solar irradiation is reduced, the adjustment is not performed when the solar irradiance variation value threshold is not exceeded, so that the correction frequency is reduced, and the operation stability of the photovoltaic module is improved.
In a preferred embodiment of the present application, when correcting the working parameters of the boost system according to the environmental parameters, the method includes:
obtaining the peak power of the photovoltaic module of the current correction time node;
generating a compensation voltage u1 of the current correction time node and acquiring a compensation voltage u2 of the previous correction time node;
if u2=0, the compensation voltage boosting speed v is set according to the compensation voltage u1 of the current correction time node.
If u2 > 0, generating a compensation voltage variation value b according to the compensation voltage u1 of the current correction time node and the compensation voltage u2 of the previous correction time node, and setting a compensation voltage correction speed c according to the compensation voltage variation value b.
Specifically, the setting of the compensation voltage correction speed c based on the compensation voltage variation b includes:
presetting a compensation voltage variation value matrix B, and setting B (B1, B2, B3 and B4), wherein B1 is a preset first compensation voltage variation value, B2 is a preset second compensation voltage variation value, B3 is a preset third compensation voltage variation value, B4 is a preset fourth compensation voltage variation value, and B1 is more than B2 and less than B3 and less than B4;
presetting a compensation voltage correction speed matrix C, and setting C (C1, C2, C3 and C4), wherein C1 is a preset first compensation voltage correction speed, C2 is a preset second compensation voltage correction speed, C3 is a preset third compensation voltage correction speed, C4 is a preset fourth compensation voltage correction speed, and C1 is more than C2 and less than C3 and less than C4;
if B1 is less than B2, setting the compensation voltage correction speed C to be a preset first compensation voltage correction speed C1, i.e. c=c1;
if B2 is less than B3, setting the compensation voltage correction speed C to be a preset second compensation voltage correction speed C2, namely c=c2;
if B3 is less than B4, setting the compensation voltage correction speed C to be a preset third compensation voltage correction speed C3, namely c=c3;
if B > B4, the compensation voltage correction speed C is set to a preset fourth compensation voltage correction speed C4, i.e., c=c4.
Specifically, when the output voltage of the photovoltaic module is in a fluctuation state, the compensation voltage is dynamically adjusted to increase the power generation amount of the whole system, the correction speed is dynamically set according to the fluctuation condition of the compensation voltage, smooth adjustment is realized, and the running stability of the system is ensured.
It can be understood that in the above embodiment, by dynamically adjusting the control parameters of the boost system, the output voltage of the photovoltaic module is compensated in time, so as to improve the power generation capacity of the whole system, reduce the system cost and widen the MPPT voltage range of the solar panel group string.
In a preferred embodiment of the present application, when correcting the working parameters of the boost system according to the environmental parameters, the method further includes:
acquiring a solar irradiance variation value a and a compensation voltage variation value b;
setting a time interval t of a next correction time node according to the solar irradiance variation value a;
the correction time interval t of the correction coefficient n is set according to the compensation voltage variation value b.
Specifically, setting the time interval t of the next correction time node includes:
presetting a time interval matrix T, and setting T (T1, T2, T3 and T4), wherein T1 is a preset first time interval, T2 is a preset second time interval, T3 is a preset third time interval, T4 is a preset fourth time interval, and T1 is more than T2 and less than T3 and less than T4;
presetting a solar irradiance variation value matrix A, and setting A (A1, A2, A3 and A4), wherein A1 is a preset first solar irradiance variation value, A2 is a preset second solar irradiance variation value, A3 is a preset third solar irradiance variation value, A4 is a preset fourth solar irradiance variation value, and A1 is less than A2 and less than A3 and less than A4;
if A1 is less than a < A2, the set time interval T is a preset first time interval T1, i.e., t=t1;
if A2 is less than a < A3, the set time interval T is a preset second time interval T2, i.e. t=t2;
if A3 is less than a < A4, the set time interval T is a preset third time interval T3, i.e., t=t3;
if a > A4, the set time interval T is a preset fourth time interval T4, i.e., t=t4.
Specifically, setting the correction coefficient n for the correction time interval t based on the compensation voltage variation value b includes:
presetting a correction coefficient matrix N, and setting N (N1, N2, N3, N4), wherein N1 is a preset first correction coefficient, N2 is a preset second correction coefficient, N3 is a preset third correction coefficient, N4 is a preset fourth correction coefficient, and N1 is more than N2 and less than N3 and less than N4 and less than 1;
if B1 is less than B2, setting n=n4, and correcting the time interval t=n4+Ti;
if B2 is less than B3, setting n=n3, and correcting the time interval t=n3+Ti;
if B3 is less than B4, setting n=n2, and correcting the time interval t=n2+Ti;
if B > B4, n=n1 is set and the corrected time interval t=n1×Ti.
It can be understood that in the above embodiment, the monitoring period is dynamically set by setting the time interval matrix and the correction coefficient matrix, and the compensation coefficient is timely corrected according to the dynamic state of the environmental parameter, so that the power generation efficiency of the photovoltaic module is ensured, and the power generation capacity of the whole system is improved.
According to the first conception, by setting the boosting device of the MPPT tracking range of the grid-connected inverter, the low-power isolation DC-DC boosting device is connected with the solar panel group string in series, so that the group MPPT voltage range of the solar panel group string is widened, when the open circuit voltage of the panel is higher, the boosting compensation device is not started when the maximum power point voltage Umpp is more than Ubusmin, and the system loss is reduced; when the open-circuit voltage of the battery plate is lower and cannot meet the condition that the maximum power point voltage is larger than Ubusmin, the boost compensation device is started, and the grid-connected inverter can always work at the maximum power point voltage Umpp of the battery assembly.
According to the second conception, the control parameters of the boosting system are dynamically adjusted, so that the output voltage of the photovoltaic module is timely compensated, the generating capacity of the whole system is improved, the system cost is reduced, and the MPPT voltage range of the solar panel group string is widened.
The foregoing is merely a preferred embodiment of the present application, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present application, and these modifications and substitutions should also be considered as being within the scope of the present application.
Claims (10)
1. The control method of the boosting system based on the MPPT tracking range is characterized by comprising the following steps of:
establishing a photovoltaic module peak power model according to historical operation data of the photovoltaic module;
acquiring a real-time operation value of a photovoltaic module, generating real-time peak power of the photovoltaic module according to the real-time operation value of the photovoltaic module and the peak power model of the photovoltaic module, and setting working parameters of a boosting system;
presetting a correction time node, acquiring environmental parameters according to the correction time node, and correcting the real-time peak power of the photovoltaic module and the working parameters of the boosting system according to the environmental parameters.
2. The boost system control method based on the MPPT tracking range of claim 1, wherein setting the boost system operating parameters comprises:
generating a maximum output voltage U1 according to the real-time peak power of the photovoltaic module;
acquiring a real-time output voltage U2 of the photovoltaic module;
if U2 is less than U1, setting a compensation voltage U according to the difference between the maximum output voltage U1 and the real-time output voltage U2;
and setting a compensation voltage boosting speed v according to the compensation voltage u.
3. The MPPT tracking range-based boost system control method of claim 2, wherein when setting the compensation voltage boost speed v according to the compensation voltage u, further comprising:
presetting a compensation voltage matrix U, and setting U (U1, U2, U3 and U4), wherein U1 is preset first compensation voltage, U2 is preset second compensation voltage, U3 is preset third compensation voltage, U4 is preset fourth compensation voltage, and U1 is more than U2 and less than U3 and more than U4;
presetting a compensation voltage boosting speed matrix V, and setting V (V1, V2, V3 and V4), wherein V1 is a preset first compensation voltage boosting speed, V2 is a preset second compensation voltage boosting speed, V3 is a preset third compensation voltage boosting speed, and V4 is a preset fourth compensation voltage boosting speed;
if U is less than U1, setting the compensation voltage boosting speed V as a preset first compensation voltage boosting speed V1, namely v=v1;
if U1 is less than U2, setting the compensation voltage boost speed V to be a preset second compensation voltage boost speed V2, namely v=v2;
if U2 is less than U3, setting the compensation voltage boost speed V to be a preset third compensation voltage boost speed V3, namely v=v3;
if U3 < U4, the compensation voltage boost speed V is set to be the preset fourth compensation voltage boost speed V4, i.e., v=v4.
4. The MPPT tracking range-based boost system control method of claim 3, wherein when modifying the real-time peak power of the photovoltaic module according to the environmental parameter, comprising:
acquiring real-time solar irradiance a1 according to the environmental parameter;
acquiring solar irradiance a2 of the last correction time node;
generating a solar irradiance variation value a according to the absolute value of the difference value of the a1 and the a2;
presetting a solar irradiance variation value threshold;
if a1 is less than a2,
when the solar irradiance variation value a is smaller than the solar irradiance variation value threshold, not correcting the real-time peak power of the photovoltaic module;
when the solar irradiance variation value a is larger than the solar irradiance variation value threshold, correcting the real-time peak power of the photovoltaic module according to the solar irradiance variation value a and the photovoltaic module peak power model;
if a1 > a2;
and correcting the real-time peak power of the photovoltaic module according to the solar irradiance variation value a and the peak power model of the photovoltaic module.
5. The MPPT tracking range-based boost system control method of claim 4, wherein when modifying the boost system operating parameter according to the environmental parameter, comprising:
obtaining the peak power of the photovoltaic module of the current correction time node;
generating a compensation voltage u1 of the current correction time node and acquiring a compensation voltage u2 of the previous correction time node;
if u2=0, the compensation voltage boosting speed v is set according to the compensation voltage u1 of the current correction time node.
6. The MPPT tracking range-based boost system control method of claim 5, wherein when modifying the boost system operating parameter according to the environmental parameter, comprising:
if u2 > 0, generating a compensation voltage variation value b according to the compensation voltage u1 of the current correction time node and the compensation voltage u2 of the previous correction time node, and setting a compensation voltage correction speed c according to the compensation voltage variation value b.
7. The MPPT tracking range-based boost system control method according to claim 7, wherein when setting the compensation voltage correction speed c according to the compensation voltage variation value b, comprising:
presetting a compensation voltage variation value matrix B, and setting B (B1, B2, B3 and B4), wherein B1 is a preset first compensation voltage variation value, B2 is a preset second compensation voltage variation value, B3 is a preset third compensation voltage variation value, B4 is a preset fourth compensation voltage variation value, and B1 is more than B2 and less than B3 and less than B4;
presetting a compensation voltage correction speed matrix C, and setting C (C1, C2, C3 and C4), wherein C1 is a preset first compensation voltage correction speed, C2 is a preset second compensation voltage correction speed, C3 is a preset third compensation voltage correction speed, C4 is a preset fourth compensation voltage correction speed, and C1 is more than C2 and less than C3 and less than C4;
if B1 is less than B2, setting the compensation voltage correction speed C to be a preset first compensation voltage correction speed C1, i.e. c=c1;
if B2 is less than B3, setting the compensation voltage correction speed C to be a preset second compensation voltage correction speed C2, namely c=c2;
if B3 is less than B4, setting the compensation voltage correction speed C to be a preset third compensation voltage correction speed C3, namely c=c3;
if B > B4, the compensation voltage correction speed C is set to a preset fourth compensation voltage correction speed C4, i.e., c=c4.
8. The MPPT tracking range-based boost system control method of claim 6, further comprising, when modifying the boost system operating parameter according to the environmental parameter:
acquiring a solar irradiance variation value a and a compensation voltage variation value b;
setting a time interval t of a next correction time node according to the solar irradiance variation value a;
and setting a correction coefficient n to correct the time interval t according to the compensation voltage variation value b.
9. The MPPT tracking range-based boost system control method according to claim 8, wherein when setting the time interval t of the next correction time node, comprising:
presetting a time interval matrix T, and setting T (T1, T2, T3 and T4), wherein T1 is a preset first time interval, T2 is a preset second time interval, T3 is a preset third time interval, T4 is a preset fourth time interval, and T1 is more than T2 and less than T3 and less than T4;
presetting a solar irradiance variation value matrix A, and setting A (A1, A2, A3 and A4), wherein A1 is a preset first solar irradiance variation value, A2 is a preset second solar irradiance variation value, A3 is a preset third solar irradiance variation value, A4 is a preset fourth solar irradiance variation value, and A1 is less than A2 and less than A3 and less than A4;
if A1 is less than a < A2, the set time interval T is a preset first time interval T1, i.e., t=t1;
if A2 is less than a < A3, the set time interval T is a preset second time interval T2, i.e. t=t2;
if A3 is less than a < A4, the set time interval T is a preset third time interval T3, i.e., t=t3;
if a > A4, the set time interval T is a preset fourth time interval T4, i.e., t=t4.
10. The MPPT tracking range-based boost system control method of claim 9, wherein setting the correction coefficient n for the correction time interval t according to the compensation voltage variation value b, comprises:
presetting a correction coefficient matrix N, and setting N (N1, N2, N3, N4), wherein N1 is a preset first correction coefficient, N2 is a preset second correction coefficient, N3 is a preset third correction coefficient, N4 is a preset fourth correction coefficient, and N1 is more than N2 and less than N3 and less than N4 and less than 1;
if B1 is less than B2, setting n=n4, and correcting the time interval t=n4+Ti;
if B2 is less than B3, setting n=n3, and correcting the time interval t=n3+Ti;
if B3 is less than B4, setting n=n2, and correcting the time interval t=n2+Ti;
if B > B4, n=n1 is set and the corrected time interval t=n1×Ti.
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