CN112688639A - Control method and device for current photovoltaic grid-connected inverter - Google Patents
Control method and device for current photovoltaic grid-connected inverter Download PDFInfo
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Abstract
The invention belongs to the field of inverters, and relates to the technology of inverter control equipment, in particular to a current photovoltaic grid-connected inverter control method and a current photovoltaic grid-connected inverter control device. The photoelectric conversion efficiency can be analyzed and monitored in real time through the arranged photoelectric conversion module.
Description
Technical Field
The invention belongs to the field of inverters, relates to the technology of inverter control equipment, and particularly relates to a control method and a control device of a current photovoltaic grid-connected inverter.
Background
The photovoltaic power generation system is mainly a direct current system, namely, the electric energy generated by the solar cell is used for charging the storage battery, and the storage battery is used for directly supplying power to the load, for example, the solar energy user lighting system which is used more in northwest areas of China and the microwave station power supply system which is far away from a power grid are direct current systems.
The conventional control device of the photovoltaic power generation grid-connected inverter cannot detect and analyze the photoelectric conversion efficiency generally, and cannot evaluate the qualification rate of the solar power generation assembly on the whole, so that the photovoltaic power generation efficiency cannot be detected timely when the photovoltaic power generation efficiency does not meet the requirement.
Disclosure of Invention
The invention aims to provide a control method and a device for a current photovoltaic grid-connected inverter;
the technical problems to be solved by the invention are as follows:
(1) how to provide an inverter control device capable of detecting and analyzing the photoelectric conversion efficiency;
(2) provided is an inverter control device capable of evaluating the yield of a solar power generation module.
The purpose of the invention can be realized by the following technical scheme:
a current photovoltaic grid-connected inverter control device comprises a control box body, wherein a base is fixedly installed at the bottom of the control box body, a control panel is arranged on the front surface of the control box body, a switch is arranged on the front surface of the control panel, ventilation holes are formed in two side surfaces of the control box body, a filter screen is arranged between the inner walls of the ventilation holes, a radiator is arranged at the top of the control box body, and a solar power generation assembly and a processor are arranged on the inner wall of the control box body;
the processor is in communication connection with a photoelectric conversion module, a heat dissipation analysis module, a monitoring module, an inversion module, a registration login module, a maintenance recommendation module and a database;
the photovoltaic conversion module converts light energy into electric energy through the solar power generation assembly, the prepared electric energy is sent to the control module, and the solar power generation assembly is combined with a building material through a solar photovoltaic cell to form a building material type solar power generation assembly;
the inversion module is used for converting direct current generated by the photoelectric conversion module into alternating current through the micro inversion control integrated machine; the monitoring module is used for monitoring the light energy conversion efficiency of the photoelectric conversion module, and marking the solar power generation assembly as i, i ═ 1, 2,. the.
Acquiring a temperature value of the surface of the solar power generation assembly, and marking the temperature value of the surface of the solar power generation assembly as Ti;
acquiring the illumination upper limit luminous flux of the solar power generation assembly, and marking the illumination upper limit luminous flux of the solar power generation assembly as Gi;
step three, acquiring the illumination effective time of the solar power generation assembly, and marking the illumination effective time of the solar power generation assembly as Ci;
step four, passing through a formula
Acquiring a monitoring coefficient Xi of the solar power generation assembly, wherein alpha 1, alpha 2 and alpha 3 are set proportionality coefficients, and alpha 1 is greater than alpha 2 and greater than alpha 3 is greater than 0;
step five, acquiring a monitoring coefficient threshold value Xmax through a database, comparing the monitoring coefficient Xi of the solar power generation assembly with the monitoring coefficient threshold value Xmax, marking the number of the solar power generation assemblies with the detection coefficient smaller than the monitoring coefficient threshold value Xmax as m, and obtaining the monitoring coefficient threshold value Xmax through a formula
Obtaining the qualification rate BZ of the solar power generation assembly, wherein beta is a set proportionality coefficient and is 0<β<1；
Acquiring a qualification rate threshold BZmin of the solar power generation assembly through a database, and comparing the qualification rate BZ of the solar power generation assembly with the qualification rate threshold BZmin;
if the qualification rate BZ of the solar power generation assembly is smaller than the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly meets the requirement, generating a heating signal and sending the heating signal to a control module, sending the heating signal to a mobile phone terminal of a manager after the control module receives the heating signal, and transmitting the electric power prepared by the solar power generation assembly to a water heater terminal after the mobile phone terminal of the manager receives the heating signal;
if the qualification rate BZ of the solar power generation assembly is larger than or equal to the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly does not meet the requirement, generating a power distribution signal and sending the power distribution signal to the control module, and sending the power distribution signal to the power distribution box module after the control module receives the power distribution signal.
Further, the heat dissipation analysis module is used for analyzing the heat dissipation efficiency of the control box body, the heat dissipation analysis module comprises a work analysis unit and a shutdown analysis unit, the work analysis unit is used for analyzing the heat dissipation efficiency of the control box body in the power-on working state of the equipment, and the shutdown analysis unit is used for analyzing the heat dissipation efficiency of the control box body in the power-off shutdown state of the equipment;
when the switch is in an on state, the equipment is in a power-on working state, the work analysis unit analyzes the work heat dissipation efficiency of the equipment, and the specific analysis process comprises the following steps:
s1: acquiring a detection temperature value of the control box body, marking the detection temperature value as JC, wherein the detection temperature value of the control box body is a difference value between an internal air temperature value and an external air temperature value of the control box body;
s2: setting v time intervals Lo, o being 1, 2, … …, v, acquiring the average value of the detected temperature in the time intervals Lo, marking the average value of the detected temperature in the time intervals Lo as JCv, and the average value of the detected temperature being the average value of the detected temperature values in a single time interval;
s3: obtaining a detection temperature threshold value JCmax through a database, comparing the detection temperature mean value JCv in the time interval Lo with the detection temperature threshold value JCmax one by one, marking the number of the time intervals with the detection temperature mean values larger than the detection temperature threshold value as e, and obtaining the detection temperature threshold value JCmax through a formula
Obtaining a working heat dissipation coefficient SXg, wherein gamma is a set proportionality coefficient and is 0<γ<1；
S4: acquiring a heat dissipation coefficient threshold value SXmax through a database, and judging that the working heat dissipation efficiency of the control box body meets the use requirement when SXg is smaller than SXmax;
and when SXg is larger than or equal to SXmax, judging that the working heat dissipation efficiency of the control box body does not meet the use requirement, and sending a maintenance signal to the processor by the working analysis unit.
Further, when the switch is in a closed state, the equipment is in a power-off shutdown state, the shutdown analysis unit analyzes the shutdown heat dissipation efficiency of the equipment, and the specific analysis process comprises the following steps:
c1: acquiring time of switching the switch from on to off, marking the time of switching the switch from on to off as SJ1, acquiring a standing temperature value JZ through a database, and marking the time when the air temperature value in the control box body is reduced to JZ as SJ 2;
c2: obtaining a time difference value SJc when the temperature value of the air in the control box body is reduced to JZ by subtracting SJ1 from SJ2, and obtaining a time difference value threshold SJmax through a database;
c3: when SJc < SJmax, judging that the shutdown heat dissipation efficiency of the control box body meets the use requirement; and when SJc is larger than or equal to SJmax, judging that the shutdown heat dissipation efficiency of the control box body does not meet the use requirement, and sending a maintenance signal to the processor by the shutdown analysis unit.
Furthermore, the processor is in communication connection with a registration login module, and the registration login module comprises a registration unit and a login unit;
the registration unit is used for registering the manager through registration information, wherein the registration information comprises the name, the sex and the age of the manager and a mobile phone number for real-name authentication;
the login unit is used for a manager to log in through login information, and the login information comprises a user name and a login password set by the manager.
Further, the treater receives maintenance signal after with maintenance signal transmission to maintenance recommendation module, maintenance recommendation module is used for recommending the maintainer to the managers, and specific recommendation process includes:
taking the control box body as a circle center, drawing a circle by taking the L1 as a diameter, taking the L1 as a set diameter value, marking the obtained circular area as P, and obtaining the identity information of all maintenance workers in the area P, wherein the identity information comprises the name, age, mobile phone number, working age and complaint times within half a year of the maintenance workers;
and screening maintenance workers with the working years higher than one year and complaint times lower than twice in half a year, acquiring the linear distances between all the screened maintenance workers and the control box body, marking the maintenance worker with the shortest linear distance with the control box body as a recommended maintenance worker, and sending the identity information of the recommended maintenance worker to the mobile phone terminal of a manager.
A control method of a current photovoltaic grid-connected inverter specifically comprises the following steps:
the first step is as follows: converting direct current generated by the photoelectric conversion module into alternating current through the micro inversion control all-in-one machine; the monitoring module is used for monitoring the light energy conversion efficiency of the photoelectric conversion module, and the solar power generation assembly is marked as i, i ═ 1, 2.
The second step is that: acquiring a temperature value of the surface of the solar power generation assembly, marking the temperature value of the surface of the solar power generation assembly as Ti, acquiring an illumination upper limit luminous flux of the solar power generation assembly, marking the illumination upper limit luminous flux of the solar power generation assembly as Gi, acquiring illumination effective duration of the solar power generation assembly, and marking the illumination effective duration of the solar power generation assembly as Ci;
the third step: by the formula
Acquiring a monitoring coefficient Xi of the solar power generation assembly, wherein alpha 1, alpha 2 and alpha 3 are set proportionality coefficients, and alpha 1 is greater than alpha 2 and greater than alpha 3 is greater than 0;
the fifth step: acquiring a monitoring coefficient threshold value Xmax through a database, comparing the monitoring coefficient Xi of the solar power generation assembly with the monitoring coefficient threshold value Xmax, marking the number of the solar power generation assemblies with the detection coefficient smaller than the monitoring coefficient threshold value Xmax as m, and obtaining the monitoring coefficient threshold value Xmax through a formula
Obtaining the qualification rate BZ of the solar power generation assembly, wherein beta is a set proportionality coefficient and is 0<β<1；
And a sixth step: acquiring a qualification rate threshold BZmin of the solar power generation assembly through a database, and comparing the qualification rate BZ of the solar power generation assembly with the qualification rate threshold BZmin;
if the qualification rate BZ of the solar power generation assembly is smaller than the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly meets the requirement, generating a heating signal and sending the heating signal to a control module, sending the heating signal to a mobile phone terminal of a manager after the control module receives the heating signal, and transmitting the electric power prepared by the solar power generation assembly to a water heater terminal after the mobile phone terminal of the manager receives the heating signal;
if the qualification rate BZ of the solar power generation assembly is larger than or equal to the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly does not meet the requirement, generating a power distribution signal and sending the power distribution signal to the control module, and sending the power distribution signal to the power distribution box module after the control module receives the power distribution signal.
The invention has the following beneficial effects:
1. the photoelectric conversion efficiency can be analyzed and monitored in real time through the arranged photoelectric conversion module, the monitoring coefficient Xi obtained through calculation is used for reflecting the photoelectric conversion efficiency, the larger the numerical value of Xi is, the higher the photoelectric conversion efficiency is, and on the contrary, the smaller the numerical value of Xi is, the lower the photoelectric conversion efficiency is;
2. the qualification rate BZ of the solar power generation assembly is obtained by further analyzing the monitoring coefficient Xi, wherein BZ represents the integral qualification rate of the solar power generation assembly, and whether the solar power generation assembly meets the requirement or not can be obtained by comparing BZ with a qualification rate threshold BZmin;
3. the heat dissipation analysis module can be used for respectively analyzing the heat dissipation efficiency of the working state and the shutdown state of the control box body, and when the heat dissipation efficiency does not meet the use requirement, the heat dissipation analysis module sends a maintenance signal to the processor, so that the equipment can be maintained in time when the heat dissipation analysis fails;
4. through the maintenance recommendation module, the most suitable maintenance worker can be recommended for the manager when the equipment needs to be maintained, the maintenance worker is screened through the working year, the complaint times in half a year and the linear distance between the complaint times and the control box body, the most suitable maintenance worker is marked as the recommended maintenance worker, the identity information of the recommended maintenance worker is sent to the mobile phone terminal of the manager, and the manager can contact the recommended maintenance worker.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a side view of the structure of a current-photovoltaic grid-connected inverter control device according to the present invention;
fig. 2 is a schematic block diagram of the present invention.
In the figure: 1. a control box body; 2. a base; 3. a control panel; 4. filtering with a screen; 5. a heat sink.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
As shown in fig. 1-2, a current photovoltaic grid-connected inverter control device comprises a control box 1, wherein a base 2 is fixedly installed at the bottom of the control box 1, a control panel 3 is arranged on the front surface of the control box 1, a switch is arranged on the front surface of the control panel 3, vent holes are formed in two side surfaces of the control box 1, a filter screen 4 is arranged between inner walls of the vent holes, a radiator 5 is arranged at the top of the control box 1, and a solar power generation assembly and a processor are arranged on the inner wall of the control box 1;
the processor is in communication connection with a photoelectric conversion module, a heat dissipation analysis module, a monitoring module, an inversion module, a registration login module, a maintenance recommendation module and a database;
the photovoltaic conversion module converts light energy into electric energy through the solar power generation assembly, the prepared electric energy is sent to the control module, and the solar power generation assembly is combined with a building material through a solar photovoltaic cell to form a building material type solar power generation assembly;
the inversion module is used for converting direct current generated by the photoelectric conversion module into alternating current through the micro inversion control integrated machine; the monitoring module is used for monitoring the light energy conversion efficiency of the photoelectric conversion module, and marking the solar power generation assembly as i, i ═ 1, 2,. the.
Acquiring a temperature value of the surface of the solar power generation assembly, and marking the temperature value of the surface of the solar power generation assembly as Ti;
acquiring the illumination upper limit luminous flux of the solar power generation assembly, and marking the illumination upper limit luminous flux of the solar power generation assembly as Gi;
step three, acquiring the illumination effective time of the solar power generation assembly, and marking the illumination effective time of the solar power generation assembly as Ci;
step four, passing through a formula
Acquiring a monitoring coefficient Xi of the solar power generation assembly, wherein alpha 1, alpha 2 and alpha 3 are set proportionality coefficients, and alpha 1 is greater than alpha 2 and greater than alpha 3 is greater than 0;
step five, acquiring a monitoring coefficient threshold value Xmax through a database, comparing the monitoring coefficient Xi of the solar power generation assembly with the monitoring coefficient threshold value Xmax, marking the number of the solar power generation assemblies with the detection coefficient smaller than the monitoring coefficient threshold value Xmax as m, and obtaining the monitoring coefficient threshold value Xmax through a formula
Obtaining the qualification rate BZ of the solar power generation assembly, wherein beta is a set proportionality coefficient and is 0<β<1；
Acquiring a qualification rate threshold BZmin of the solar power generation assembly through a database, and comparing the qualification rate BZ of the solar power generation assembly with the qualification rate threshold BZmin;
if the qualification rate BZ of the solar power generation assembly is smaller than the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly meets the requirement, generating a heating signal and sending the heating signal to a control module, sending the heating signal to a mobile phone terminal of a manager after the control module receives the heating signal, and transmitting the electric power prepared by the solar power generation assembly to a water heater terminal after the mobile phone terminal of the manager receives the heating signal;
if the qualification rate BZ of the solar power generation assembly is larger than or equal to the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly does not meet the requirement, generating a power distribution signal and sending the power distribution signal to the control module, and sending the power distribution signal to the power distribution box module after the control module receives the power distribution signal.
The heat dissipation analysis module is used for analyzing the heat dissipation efficiency of the control box body 1, and comprises a work analysis unit and a shutdown analysis unit, wherein the work analysis unit is used for analyzing the heat dissipation efficiency of the control box body 1 in the power-on working state of the equipment, and the shutdown analysis unit is used for analyzing the heat dissipation efficiency of the control box body 1 in the power-off shutdown state of the equipment;
when the switch is in an on state, the equipment is in a power-on working state, the work analysis unit analyzes the work heat dissipation efficiency of the equipment, and the specific analysis process comprises the following steps:
s1: acquiring a detection temperature value of the control box body 1, marking the detection temperature value as JC, wherein the detection temperature value of the control box body 1 is a difference value between an internal air temperature value and an external air temperature value of the control box body 1;
s2: setting v time intervals Lo, o being 1, 2, … …, v, acquiring the average value of the detected temperature in the time intervals Lo, marking the average value of the detected temperature in the time intervals Lo as JCv, and the average value of the detected temperature being the average value of the detected temperature values in a single time interval;
s3: obtaining a detection temperature threshold value JCmax through a database, comparing the detection temperature mean value JCv in the time interval Lo with the detection temperature threshold value JCmax one by one, marking the number of the time intervals with the detection temperature mean values larger than the detection temperature threshold value as e, and obtaining the detection temperature threshold value JCmax through a formula
Obtaining a working heat dissipation coefficient SXg, wherein gamma is a set proportionality coefficient and is 0<γ<1；
S4: acquiring a heat dissipation coefficient threshold value SXmax through a database, and judging that the working heat dissipation efficiency of the control box body 1 meets the use requirement when SXg is smaller than SXmax;
when SXg is larger than or equal to SXmax, the work heat dissipation efficiency of the control box body 1 is judged not to meet the use requirement, and the work analysis unit sends a maintenance signal to the processor.
When the switch is in a closed state, the equipment is in a power-off shutdown state, the shutdown analysis unit analyzes the shutdown heat dissipation efficiency of the equipment, and the specific analysis process comprises the following steps:
c1: acquiring the time of switching the switch from on to off, marking the time of switching the switch from on to off as SJ1, acquiring a standing temperature value JZ through a database, and marking the time when the air temperature value in the control box body 1 is reduced to JZ as SJ 2;
c2: obtaining a time difference value SJc when the temperature value of the air in the control box body 1 is reduced to JZ by subtracting SJ1 from SJ2, and obtaining a time difference value threshold SJmax through a database;
c3: when SJc < SJmax, judging that the shutdown heat dissipation efficiency of the control box body 1 meets the use requirement; and when SJc is more than or equal to SJmax, judging that the shutdown heat dissipation efficiency of the control box body 1 does not meet the use requirement, and sending a maintenance signal to the processor by the shutdown analysis unit.
The processor is in communication connection with a registration login module, and the registration login module comprises a registration unit and a login unit;
the registration unit is used for registering the manager through registration information, wherein the registration information comprises the name, the sex and the age of the manager and a mobile phone number for real-name authentication;
the login unit is used for a manager to log in through login information, and the login information comprises a user name and a login password set by the manager.
The treater receives after the maintenance signal with maintenance signal transmission to maintenance recommendation module, maintenance recommendation module is used for recommending the maintainer to the managers, and specific recommendation process includes:
taking the control box body 1 as a circle center, drawing a circle by taking L1 as a diameter, taking L1 as a set diameter value, marking the obtained circular area as P, and obtaining the identity information of all maintenance workers in the area P, wherein the identity information comprises the name, age, mobile phone number, working age and complaint times within half a year of the maintenance workers;
and screening maintenance workers with the working years higher than one year and complaint times lower than two times in half a year, acquiring the linear distances between all the screened maintenance workers and the control box body 1, marking the maintenance worker with the shortest linear distance to the control box body 1 as a recommended maintenance worker, and sending the identity information of the recommended maintenance worker to the mobile phone terminal of a manager.
Example 2
As shown in fig. 1-2, a method for controlling a current photovoltaic grid-connected inverter specifically includes the following steps:
the first step is as follows: converting direct current generated by the photoelectric conversion module into alternating current through the micro inversion control all-in-one machine; the monitoring module is used for monitoring the light energy conversion efficiency of the photoelectric conversion module, and the solar power generation assembly is marked as i, i ═ 1, 2.
The second step is that: acquiring a temperature value of the surface of the solar power generation assembly, marking the temperature value of the surface of the solar power generation assembly as Ti, acquiring an illumination upper limit luminous flux of the solar power generation assembly, marking the illumination upper limit luminous flux of the solar power generation assembly as Gi, acquiring illumination effective duration of the solar power generation assembly, and marking the illumination effective duration of the solar power generation assembly as Ci;
the third step: by the formula
Acquiring a monitoring coefficient Xi of the solar power generation assembly, wherein alpha 1, alpha 2 and alpha 3 are set proportionality coefficients, and alpha 1 is greater than alpha 2 and greater than alpha 3 is greater than 0;
the fifth step: acquiring a monitoring coefficient threshold value Xmax through a database, comparing the monitoring coefficient Xi of the solar power generation assembly with the monitoring coefficient threshold value Xmax, marking the number of the solar power generation assemblies with the detection coefficient smaller than the monitoring coefficient threshold value Xmax as m, and obtaining the monitoring coefficient threshold value Xmax through a formula
Obtaining the qualification rate BZ of the solar power generation assembly, wherein beta is a set proportionality coefficient and is 0<β<1；
And a sixth step: acquiring a qualification rate threshold BZmin of the solar power generation assembly through a database, and comparing the qualification rate BZ of the solar power generation assembly with the qualification rate threshold BZmin;
if the qualification rate BZ of the solar power generation assembly is smaller than the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly meets the requirement, generating a heating signal and sending the heating signal to a control module, sending the heating signal to a mobile phone terminal of a manager after the control module receives the heating signal, and transmitting the electric power prepared by the solar power generation assembly to a water heater terminal after the mobile phone terminal of the manager receives the heating signal;
if the qualification rate BZ of the solar power generation assembly is larger than or equal to the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly does not meet the requirement, generating a power distribution signal and sending the power distribution signal to the control module, and sending the power distribution signal to the power distribution box module after the control module receives the power distribution signal.
When the current photovoltaic grid-connected inverter control device is used, direct current generated by a photoelectric conversion module is converted into alternating current through a micro inversion control all-in-one machine; the monitoring module is used for monitoring the light energy conversion efficiency of the photoelectric conversion module, obtaining a temperature value on the surface of the solar power generation assembly, marking the temperature value on the surface of the solar power generation assembly as Ti, obtaining the illumination upper limit luminous flux of the solar power generation assembly, marking the illumination upper limit luminous flux of the solar power generation assembly as Gi, obtaining the illumination effective duration of the solar power generation assembly, marking the illumination effective duration of the solar power generation assembly as Ci, and calculating through a formula to obtain a monitoring coefficient Xi, wherein the value of Xi is used for reflecting the photoelectric conversion efficiency.
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the invention as defined in the following claims.
The above formulas are all numerical values obtained by normalization processing, the formula is a formula obtained by acquiring a large amount of data and performing software simulation to obtain the latest real situation, and the preset parameters in the formula are set by the technical personnel in the field according to the actual situation.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (6)
1. The current photovoltaic grid-connected inverter control device comprises a control box body (1), and is characterized in that a base (2) is fixedly mounted at the bottom of the control box body (1), a control panel (3) is arranged on the front side of the control box body (1), a switch is arranged on the front side of the control panel (3), ventilation holes are formed in two side faces of the control box body (1), a filter screen (4) is arranged between the inner walls of the ventilation holes, a radiator (5) is arranged at the top of the control box body (1), and a solar power generation assembly and a processor are arranged on the inner wall of the control box body (1);
the processor is in communication connection with a photoelectric conversion module, a heat dissipation analysis module, a monitoring module, an inversion module, a registration login module, a maintenance recommendation module and a database;
the photovoltaic conversion module converts light energy into electric energy through the solar power generation assembly, the prepared electric energy is sent to the control module, and the solar power generation assembly is combined with a building material through a solar photovoltaic cell to form a building material type solar power generation assembly;
the inversion module is used for converting direct current generated by the photoelectric conversion module into alternating current through the micro inversion control integrated machine; the monitoring module is used for monitoring the light energy conversion efficiency of the photoelectric conversion module, and marking the solar power generation assembly as i, i ═ 1, 2,. the.
Acquiring a temperature value of the surface of the solar power generation assembly, and marking the temperature value of the surface of the solar power generation assembly as Ti;
acquiring the illumination upper limit luminous flux of the solar power generation assembly, and marking the illumination upper limit luminous flux of the solar power generation assembly as Gi;
step three, acquiring the illumination effective time of the solar power generation assembly, and marking the illumination effective time of the solar power generation assembly as Ci;
step four, passing through a formula
Acquiring a monitoring coefficient Xi of the solar power generation assembly, wherein alpha 1, alpha 2 and alpha 3 are set proportionality coefficients, and alpha 1 is greater than alpha 2 and greater than alpha 3 is greater than 0;
step five, acquiring a monitoring coefficient threshold value Xmax through a database, comparing the monitoring coefficient Xi of the solar power generation assembly with the monitoring coefficient threshold value Xmax, marking the number of the solar power generation assemblies with the detection coefficient smaller than the monitoring coefficient threshold value Xmax as m, and obtaining the monitoring coefficient threshold value Xmax through a formula
Obtaining the qualification rate BZ of the solar power generation assembly, wherein beta is a set proportionality coefficient and is 0<β<1；
Acquiring a qualification rate threshold BZmin of the solar power generation assembly through a database, and comparing the qualification rate BZ of the solar power generation assembly with the qualification rate threshold BZmin;
if the qualification rate BZ of the solar power generation assembly is smaller than the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly meets the requirement, generating a heating signal and sending the heating signal to a control module, sending the heating signal to a mobile phone terminal of a manager after the control module receives the heating signal, and transmitting the electric power prepared by the solar power generation assembly to a water heater terminal after the mobile phone terminal of the manager receives the heating signal;
if the qualification rate BZ of the solar power generation assembly is larger than or equal to the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly does not meet the requirement, generating a power distribution signal and sending the power distribution signal to the control module, and sending the power distribution signal to the power distribution box module after the control module receives the power distribution signal.
2. The current photovoltaic grid-connected inverter control device according to claim 1, wherein the heat dissipation analysis module is configured to analyze the heat dissipation efficiency of the control box (1), and the heat dissipation analysis module includes an operation analysis unit and a shutdown analysis unit, the operation analysis unit is configured to analyze the heat dissipation efficiency of the control box (1) in an equipment power-on operation state, and the shutdown analysis unit is configured to analyze the heat dissipation efficiency of the control box (1) in an equipment power-off shutdown state;
when the switch is in an on state, the equipment is in a power-on working state, the work analysis unit analyzes the work heat dissipation efficiency of the equipment, and the specific analysis process comprises the following steps:
s1: acquiring a detection temperature value of the control box body (1) and marking the detection temperature value as JC, wherein the detection temperature value of the control box body (1) is a difference value between an internal air temperature value and an external air temperature value of the control box body (1);
s2: setting v time intervals Lo, o being 1, 2, … …, v, acquiring the average value of the detected temperature in the time intervals Lo, marking the average value of the detected temperature in the time intervals Lo as JCv, and the average value of the detected temperature being the average value of the detected temperature values in a single time interval;
s3: obtaining a detection temperature threshold value JCmax through a database, comparing the detection temperature mean value JCv in the time interval Lo with the detection temperature threshold value JCmax one by one, marking the number of the time intervals with the detection temperature mean values larger than the detection temperature threshold value as e, and obtaining the detection temperature threshold value JCmax through a formula
Obtaining a working heat dissipation coefficient SXg, wherein gamma is a set proportionality coefficient and is 0<γ<1；
S4: acquiring a heat dissipation coefficient threshold value SXmax through a database, and judging that the working heat dissipation efficiency of the control box body (1) meets the use requirement when SXg is smaller than SXmax;
when SXg is larger than or equal to SXmax, the work heat dissipation efficiency of the control box body (1) is judged not to meet the use requirement, and the work analysis unit sends a maintenance signal to the processor.
3. The current photovoltaic grid-connected inverter control device according to claim 2, wherein when the switch is in an off state, the equipment is in a power-off shutdown state, the shutdown analysis unit analyzes shutdown heat dissipation efficiency of the equipment, and a specific analysis process includes the following steps:
c1: acquiring the time of switching the switch from on to off, marking the time of switching the switch from on to off as SJ1, acquiring a standing temperature value JZ through a database, and marking the time when the air temperature value in the control box body (1) is reduced to JZ as SJ 2;
c2: obtaining a time difference value SJc when the temperature value of the air in the control box body (1) is reduced to JZ by subtracting SJ1 from SJ2, and obtaining a time difference value threshold SJmax through a database;
c3: when SJc < SJmax, judging that the shutdown heat dissipation efficiency of the control box body (1) meets the use requirement; and when SJc is more than or equal to SJmax, judging that the shutdown heat dissipation efficiency of the control box body (1) does not meet the use requirement, and sending a maintenance signal to the processor by the shutdown analysis unit.
4. The current photovoltaic grid-connected inverter control device according to claim 1, wherein the processor is in communication connection with a registration login module, and the registration login module comprises a registration unit and a login unit;
the registration unit is used for registering the manager through registration information, wherein the registration information comprises the name, the sex and the age of the manager and a mobile phone number for real-name authentication;
the login unit is used for a manager to log in through login information, and the login information comprises a user name and a login password set by the manager.
5. The current photovoltaic grid-connected inverter control device according to claim 1, wherein the processor receives a maintenance signal and then sends the maintenance signal to a maintenance recommendation module, the maintenance recommendation module is configured to recommend a serviceman to a manager, and a specific recommendation process includes:
taking the control box body (1) as a circle center, L1 as a diameter to draw a circle, and L1 as a set diameter value, marking the obtained circular area as P, and acquiring identity information of all maintenance workers in the area P, wherein the identity information comprises names, ages, mobile phone numbers, working years and complaint times within half a year of the maintenance workers;
and screening maintenance workers with the working years higher than one year and complaint times lower than two times in half a year, acquiring the linear distances between all the screened maintenance workers and the control box body (1), marking the maintenance worker with the shortest linear distance with the control box body (1) as a recommended maintenance worker, and sending the identity information of the recommended maintenance worker to the mobile phone terminal of a manager.
6. A control method for a current photovoltaic grid-connected inverter is characterized by comprising the following steps:
the first step is as follows: converting direct current generated by the photoelectric conversion module into alternating current through the micro inversion control all-in-one machine; the monitoring module is used for monitoring the light energy conversion efficiency of the photoelectric conversion module, and the solar power generation assembly is marked as i, i ═ 1, 2.
The second step is that: acquiring a temperature value of the surface of the solar power generation assembly, marking the temperature value of the surface of the solar power generation assembly as Ti, acquiring an illumination upper limit luminous flux of the solar power generation assembly, marking the illumination upper limit luminous flux of the solar power generation assembly as Gi, acquiring illumination effective duration of the solar power generation assembly, and marking the illumination effective duration of the solar power generation assembly as Ci;
the third step: by the formula
Acquiring a monitoring coefficient Xi of the solar power generation assembly, wherein alpha 1, alpha 2 and alpha 3 are set proportionality coefficients, and alpha 1 is greater than alpha 2 and greater than alpha 3 is greater than 0;
the fifth step: acquiring a monitoring coefficient threshold value Xmax through a database, comparing the monitoring coefficient Xi of the solar power generation assembly with the monitoring coefficient threshold value Xmax, marking the number of the solar power generation assemblies with the detection coefficient smaller than the monitoring coefficient threshold value Xmax as m, and obtaining the monitoring coefficient threshold value Xmax through a formula
Obtaining the qualification rate BZ of the solar power generation assembly, wherein beta is a set proportionality coefficient and is 0<β<1；
And a sixth step: acquiring a qualification rate threshold BZmin of the solar power generation assembly through a database, and comparing the qualification rate BZ of the solar power generation assembly with the qualification rate threshold BZmin;
if the qualification rate BZ of the solar power generation assembly is smaller than the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly meets the requirement, generating a heating signal and sending the heating signal to a control module, sending the heating signal to a mobile phone terminal of a manager after the control module receives the heating signal, and transmitting the electric power prepared by the solar power generation assembly to a water heater terminal after the mobile phone terminal of the manager receives the heating signal;
if the qualification rate BZ of the solar power generation assembly is larger than or equal to the qualification rate threshold BZmin, judging that the electric power of the solar power generation assembly does not meet the requirement, generating a power distribution signal and sending the power distribution signal to the control module, and sending the power distribution signal to the power distribution box module after the control module receives the power distribution signal.
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Application publication date: 20210420 Assignee: Huai'an Xinlian Information Technology Co.,Ltd. Assignor: HUAIYIN INSTITUTE OF TECHNOLOGY Contract record no.: X2021980014320 Denomination of invention: A control method and device for current photovoltaic grid connected inverter Granted publication date: 20211012 License type: Common License Record date: 20211213 |
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Effective date of registration: 20230406 Address after: 230000 B-1015, wo Yuan Garden, 81 Ganquan Road, Shushan District, Hefei, Anhui. Patentee after: HEFEI MINGLONG ELECTRONIC TECHNOLOGY Co.,Ltd. Address before: 223113 a12-2, high tech Industrial Park, No.3, Dongqi street, Hongze District, Huai'an City, Jiangsu Province (Hongze sub center, technology transfer center of Huaiyin Institute of Technology) Patentee before: HUAIYIN INSTITUTE OF TECHNOLOGY Effective date of registration: 20230406 Address after: 037000 Tujing Village, Duzhuang Township, Yunzhou District, Datong City, Shanxi Province Patentee after: Datong panda photovoltaic power generation Co.,Ltd. Address before: 230000 B-1015, wo Yuan Garden, 81 Ganquan Road, Shushan District, Hefei, Anhui. Patentee before: HEFEI MINGLONG ELECTRONIC TECHNOLOGY Co.,Ltd. |