CN117937634A - Method and terminal for reducing photovoltaic light rejection rate - Google Patents
Method and terminal for reducing photovoltaic light rejection rate Download PDFInfo
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Abstract
The invention discloses a method and a terminal for reducing photovoltaic light rejection rate, which are used for detecting a power consumption peak Gu Ouduan and the charge state of an energy storage battery; the active power of the energy storage converter is adjusted according to the power consumption peak Gu Ouduan and the charge state of the energy storage battery; and adjusting the working state of the photovoltaic module according to the active power of the energy storage converter. According to the invention, the transmission state of the energy storage converter is controlled by detecting the electricity consumption peak Gu Ouduan, the active power of the energy storage converter is regulated in real time according to the charge state of the energy storage battery, and the working state of the photovoltaic module is regulated according to the active power transmitted by the energy storage converter, so that excessive power generation of the photovoltaic module is avoided, the light rejection rate is reduced, and the residual electricity is not on the internet.
Description
Technical Field
The invention relates to the field of energy storage, in particular to a method and a terminal for reducing photovoltaic light rejection rate.
Background
With the development of energy storage technology, the combination of industrial and commercial photovoltaics and energy storage is widely accepted gradually, the investment risk of the industrial and commercial photovoltaics is relatively low, the return is stable, and the method is favored by more and more investors. The direct-current photovoltaic energy storage technology can practically solve the problem of light rejection, promote the consumption of renewable energy sources, and realize the smooth power fluctuation, peak clipping, valley clipping, frequency modulation and voltage regulation of the renewable energy sources, so that the method is an important means for meeting the requirement of large-scale access of the renewable energy sources to a power grid.
However, at present, with the increase of the access proportion of the energy storage system in the optical storage and charge detection architecture, the problems of power fluctuation and difficult prediction of output existing in photovoltaic power generation are increasingly remarkable, and when the energy storage battery is charged under the current limiting condition or the alternating current load demand is reduced, phenomena such as light discarding and electricity limiting at different degrees can occur, so that not only is the electric energy wasted, but also the power generation income of a user is reduced, and the safe and stable operation of the whole energy storage power station is also influenced more and more.
Disclosure of Invention
The technical problems to be solved by the invention are as follows: the method and the terminal for reducing the photovoltaic light rejection rate are provided, and the light rejection rate of the photovoltaic module in the optical storage filling and detecting framework is reduced.
In order to solve the technical problems, the invention adopts the following technical scheme:
A method of reducing photovoltaic light rejection comprising the steps of:
s1, detecting a power consumption peak Gu Ouduan and the charge state of an energy storage battery;
S2, adjusting the active power of the energy storage converter according to the power consumption peak Gu Ouduan and the charge state of the energy storage battery;
And S3, adjusting the working state of the photovoltaic module according to the active power of the energy storage converter.
In order to solve the technical problems, the invention adopts another technical scheme that:
A terminal for reducing photovoltaic light rejection rate comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor performing the following steps when executing the computer program:
s1, detecting a power consumption peak Gu Ouduan and the charge state of an energy storage battery;
S2, adjusting the active power of the energy storage converter according to the power consumption peak Gu Ouduan and the charge state of the energy storage battery;
And S3, adjusting the working state of the photovoltaic module according to the active power of the energy storage converter.
The invention has the beneficial effects that: the method and the terminal for reducing the photovoltaic light rejection rate are provided, and the power consumption peak Gu Ouduan is detected, so that the transmission state of the energy storage converter is controlled, the active power of the energy storage converter is regulated in real time according to the charge state of the energy storage battery, and then the working state of the photovoltaic module is regulated according to the active power transmitted by the energy storage converter, thereby avoiding excessive power generation of the photovoltaic module, reducing the light rejection rate and realizing that residual electricity is not on the internet.
Drawings
FIG. 1 is a flow chart of a method for reducing photovoltaic light rejection rate in an embodiment of the present invention;
FIG. 2 is a schematic diagram of an implementation architecture of a method for reducing photovoltaic light rejection rate according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a terminal for reducing photovoltaic rejection in an embodiment of the present invention;
Description of the reference numerals:
1. a terminal for reducing photovoltaic rejection rate; 2. a memory; 3. a processor.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present invention in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 and 2, a method for reducing photovoltaic light rejection rate includes the steps of:
s1, detecting a power consumption peak Gu Ouduan and the charge state of an energy storage battery;
S2, adjusting the active power of the energy storage converter according to the power consumption peak Gu Ouduan and the charge state of the energy storage battery;
And S3, adjusting the working state of the photovoltaic module according to the active power of the energy storage converter.
It should be noted that, as shown in fig. 2, the embodiment of the present invention is applied to an optical storage and charging station in industrial and commercial photovoltaics, and generally includes a photovoltaic array (component), a battery pack (energy storage battery), an optical storage integrated machine, and an energy storage converter (PCS), and converts direct current into alternating current to output to an external load through the energy storage converter, or converts electric power of an external power grid into direct current to charge an internal energy storage battery through the energy storage converter.
From the above description, the beneficial effects of the invention are as follows: the power consumption peak Gu Ouduan is detected, so that the transmission state of the energy storage converter is controlled, the active power of the energy storage converter is adjusted in real time according to the charge state of the energy storage battery, the working state of the photovoltaic module is adjusted according to the active power transmitted by the energy storage converter, excessive power generation of the photovoltaic module is avoided, the light rejection rate is reduced, and the situation that residual electricity is not on the internet is realized.
In the embodiment of the present invention, the step S2 specifically includes:
S21, acquiring a power consumption peak Gu Ouduan, and if the power consumption peak Gu Ouduan is a peak power section, entering a step S22; otherwise, step S23 is entered;
S22, calculating actual discharge power of the energy storage battery according to the charge state of the energy storage battery, and controlling the active power externally output by the energy storage converter to be the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic module;
S23, calculating actual charging power according to the charge state of the energy storage battery, and controlling the active power transmitted in the energy storage converter pair to be the difference between the actual charging power of the energy storage battery and the discharging power of the photovoltaic module.
In the optical storage and charging detection system, in order to save electricity cost, an energy storage battery and a photovoltaic module are generally used for supplying power to an alternating current load in a peak electricity section, and an external power grid is prone to be used for supplementing or supplying power to the energy storage system in a valley electricity section or a flat electricity section.
Based on the above setting principle, when the electricity utilization time is in the peak electricity section, calculating the actual discharge power according to the charge state of the energy storage battery, for example, obtaining the maximum discharge power of the energy storage battery and the actual discharge power of the corresponding charge loss coefficient calculator, and controlling the active power externally output by the energy storage converter to be the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic module, namely, adopting the energy storage battery and the photovoltaic module to externally supply electricity at the moment, and ensuring that the conversion power of the energy storage converter meets the sum of the two, so as to avoid the generation of the light rejection phenomenon; when the electricity utilization time is in the valley electricity section, the external power grid is utilized to supplement electricity to the light storage and charge detection system, the power input by the external power grid through the energy storage converter (the active power transmitted in the energy storage converter pair) is the difference between the actual charging power of the energy storage battery and the discharging power of the photovoltaic module, namely the generated power of the photovoltaic module is preferentially considered at the moment, and the external power grid is utilized to supplement electricity to the energy storage battery, so that the light rejection phenomenon of the photovoltaic module is avoided.
In the embodiment of the present invention, the step S23 specifically includes:
S231, setting a first charge value and a second charge value, wherein the first charge value is larger than the second charge value, comparing the charge state of the energy storage battery with the first charge value and the second charge value, and if the charge state of the energy storage battery is smaller than the second charge value, entering step S232; if the state of charge of the energy storage battery is between the first charge value and the second charge value, step S233 is entered; otherwise, step S234 is entered;
S232, controlling an external power grid and the photovoltaic module to supplement electricity to the energy storage battery at the same time, and controlling the active power transmitted by the energy storage converter to be the difference between the actual charging power of the energy storage battery and the discharging power of the photovoltaic module;
When the state of charge of the energy storage battery is smaller than the second charge value, the external power grid and the photovoltaic assembly are utilized to supplement power to the energy storage battery at the same time, and the discharging condition of the photovoltaic assembly is considered to control the transmission power of the energy storage converter.
S233, independently controlling the photovoltaic module to supplement electricity to the energy storage battery, and controlling the active power of the energy storage converter to be zero;
when the state of charge of the energy storage battery is between the first charge value and the second charge value, the external power grid is not required to be utilized to supplement electricity to the inside, the internal transmission power of the energy storage converter is set to be zero, and the energy storage battery is charged by the photovoltaic assembly independently, so that the electric energy generated by the photovoltaic assembly is fully input into the energy storage battery.
S234, directly transmitting the electric energy generated by the photovoltaic module to the energy storage converter, and controlling the active power externally transmitted by the energy storage converter to be the actual discharge power of the photovoltaic module.
When the state of charge of the energy storage battery is greater than or equal to a first charge value, the energy storage battery is in an optimal discharge state, charging is not needed, the energy storage battery is in a valley level or even electric section, in order to avoid photovoltaic light rejection, the energy storage converter is controlled to transmit all electric energy generated by the photovoltaic module to the outside to a load, and the energy storage converter is controlled to externally transmit active power to control actual discharge power of the photovoltaic module.
In an embodiment of the present invention, the step S234 further includes:
and obtaining the alternating current load demand power, comparing the alternating current load demand power with the actual discharge power of the photovoltaic module, and taking the minimum value of the alternating current load demand power and the actual discharge power as the active power externally output by the energy storage converter.
From the above description, the alternating current load demand power is considered at the valley level or the flat level section, and compared with the actual discharge power of the photovoltaic module, the minimum value is taken as the active power of the energy storage converter, which is output externally, so that the electric energy generated by the photovoltaic module is prevented from exceeding the load demand, the power value of the photovoltaic module is limited in the step S3 when the load demand is smaller than the discharge power of the photovoltaic module, and the principle that the surplus electricity is not connected to the internet is realized while the light is avoided.
In an embodiment of the present invention, the step S22 further includes:
and obtaining the alternating current load demand power, comparing the alternating current load demand power with the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic module, and taking the minimum value of the alternating current load demand power and the sum as the active power externally output by the energy storage converter.
Meanwhile, the alternating current load demand power is considered in the peak power section, the alternating current load demand power is compared with the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic module, the minimum value is taken as the active power of the energy storage converter, which is output outwards, the electric energy generated by the photovoltaic module is prevented from exceeding the load demand, the power value of the photovoltaic module is limited in the step S3 when the load demand is smaller than the discharge power of the photovoltaic module, and the principle that the surplus electricity is not connected with the internet is realized while the light is avoided.
A terminal for reducing photovoltaic light rejection rate comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor performing the steps of the above method for reducing photovoltaic light rejection rate when executing the computer program.
As can be seen from the above description, the method for reducing the photovoltaic light rejection rate is provided, when the method is executed, the transmission state of the energy storage converter is controlled by detecting the power consumption peak Gu Ouduan, and the active power of the energy storage converter is adjusted in real time according to the charge state of the energy storage battery, so that the working state of the photovoltaic module is adjusted according to the active power transmitted by the energy storage converter, excessive power generation of the photovoltaic module is avoided, the light rejection rate is reduced, and the residual electricity is realized without surfing.
The invention provides a method and a terminal for reducing photovoltaic light rejection rate, which are mainly applied to control of the light rejection rate of a light storage and filling detection system, and are specifically described below with reference to embodiments.
Referring to fig. 1 to 2, a first embodiment of the present invention is as follows:
A method of reducing photovoltaic light rejection comprising the steps of:
s1, detecting a power consumption peak Gu Ouduan and the charge state of an energy storage battery;
S2, adjusting the active power of the energy storage converter according to the power consumption peak Gu Ouduan and the charge state of the energy storage battery;
The step S2 specifically comprises the following steps:
S21, acquiring a power consumption peak Gu Ouduan, and if the power consumption peak Gu Ouduan is a peak power section, entering a step S22; otherwise, step S23 is entered;
S22, calculating actual discharge power of the energy storage battery according to the charge state of the energy storage battery, and controlling the active power externally output by the energy storage converter to be the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic module;
the method also comprises the steps of: and obtaining the alternating current load demand power, comparing the alternating current load demand power with the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic module, and taking the minimum value of the alternating current load demand power and the sum as the active power externally output by the energy storage converter. And the alternating current load demand power is considered at the peak electricity section, and compared with the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic module, the minimum value is taken as the active power of the energy storage converter, which is output outwards, so that the electric energy generated by the photovoltaic module is prevented from exceeding the load demand, the power value of the photovoltaic module is limited in the step S3 when the load demand is smaller than the discharge power of the photovoltaic module, and the principle that the surplus electricity is not connected with the internet is realized while the light is avoided.
S23, calculating actual charging power according to the charge state of the energy storage battery, and controlling the active power transmitted in the energy storage converter pair to be the difference between the actual charging power of the energy storage battery and the discharging power of the photovoltaic module.
The step S23 specifically includes:
s231, setting a first charge value and a second charge value, wherein the first charge value is larger than the second charge value, comparing the charge state of the energy storage battery with the first charge value and the second charge value, and if the charge state of the energy storage battery is smaller than the second charge value, entering step S232; if the state of charge of the energy storage battery is between the first charge value and the second charge value, step S233 is entered; otherwise, step S234 is entered;
S232, controlling an external power grid and the photovoltaic module to supplement electricity to the energy storage battery at the same time, and controlling the active power transmitted by the energy storage converter to be the difference between the actual charging power of the energy storage battery and the discharging power of the photovoltaic module; when the state of charge of the energy storage battery is smaller than the second charge value, the external power grid and the photovoltaic assembly are utilized to supplement power to the energy storage battery at the same time, and the discharging condition of the photovoltaic assembly is considered to control the transmission power of the energy storage converter.
S233, independently controlling the photovoltaic module to supplement electricity to the energy storage battery, and controlling the active power of the energy storage converter to be zero; when the state of charge of the energy storage battery is between the first charge value and the second charge value, the external power grid is not required to be utilized to supplement electricity to the inside, the internal transmission power of the energy storage converter is set to be zero, and the energy storage battery is charged by the photovoltaic assembly independently, so that the electric energy generated by the photovoltaic assembly is fully input into the energy storage battery.
S234, directly transmitting the electric energy generated by the photovoltaic module to the energy storage converter, and controlling the active power externally transmitted by the energy storage converter to be the actual discharge power of the photovoltaic module. When the state of charge of the energy storage battery is greater than or equal to a first charge value, the energy storage battery is in an optimal discharge state, charging is not needed, the energy storage battery is in a valley level or even electric section, in order to avoid photovoltaic light rejection, the energy storage converter is controlled to transmit all electric energy generated by the photovoltaic module to the outside to a load, and the energy storage converter is controlled to externally transmit active power to control actual discharge power of the photovoltaic module.
Further comprises: and obtaining the alternating current load demand power, comparing the alternating current load demand power with the actual discharge power of the photovoltaic module, and taking the minimum value of the alternating current load demand power and the actual discharge power as the active power externally output by the energy storage converter. And meanwhile, the alternating current load demand power is considered in the valley electricity or flat electricity section, the alternating current load demand power is compared with the actual discharge power of the photovoltaic module, the minimum value is taken as the active power of the energy storage converter, which is output outwards, the electric energy generated by the photovoltaic module is prevented from exceeding the load demand, the power value of the photovoltaic module is limited in the step S3 when the load demand is smaller than the discharge power of the photovoltaic module, and the principle that the residual electricity is not connected with the internet is realized while the light is avoided.
And S3, adjusting the working state of the photovoltaic module according to the active power of the energy storage converter.
In this embodiment, the transmission state of the energy storage converter is controlled by detecting the power consumption peak Gu Ouduan, and the active power of the energy storage converter is adjusted in real time according to the charge state of the energy storage battery, so that the working state of the photovoltaic module is adjusted according to the active power transmitted by the energy storage converter, excessive power generation of the photovoltaic module is avoided, the light rejection rate is reduced, and the residual electricity is not connected to the internet.
Referring to fig. 1 to 2, a second embodiment of the present invention is as follows: on the basis of the first embodiment, the following is executed in the practical application process of the method for reducing the photovoltaic light rejection rate:
1. And collecting the total active power P1 of the electric meter at the power grid side in real time, the active power P2 of the energy storage converter and the direct current photovoltaic power P3, and calculating alternating current loads P4=P1-P2 according to the data.
2. And calculating the maximum battery discharging power P5 and the maximum battery charging power P6 in real time according to the battery charging and discharging current limiting value.
3. Setting a direct-current photovoltaic power supply warning value SOC1 (first charge value) and an alternating-current discharge coefficient W1; a battery discharge coefficient W2; a photovoltaic alternating current discharge coefficient W3; the battery charging coefficient W4 is related to the corresponding rated power to obtain the actual running power through the above coefficients, i.e. P5×w2 is the actual battery discharging power, P6×w4 is the actual battery charging power, and P4×w1 is the actual power used by the ac load.
4. And in peak electricity time, converting direct current generated by the direct current photovoltaic assembly into alternating current through the energy storage converter, when the power generated by the direct current photovoltaic assembly is insufficient or the photovoltaic power generation system stops working, the energy storage battery can release the direct current to be converted into alternating current through the energy storage converter for being used by a local load, adjusting the active power P=Min (P4×W1, P5×W2+P3) of the energy storage converter, namely obtaining the required power of the alternating current load, comparing the required power with the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic assembly, and taking the minimum value of the two as the active power externally output by the energy storage converter.
5. The valley electricity or the flat electricity time is set, the power supply cut-off SOC3 (second charge value) of the power grid is set, and the SOC3 is ensured to be smaller than the SOC1, and the transmission active power of the energy storage converter is P5; when the actual state of charge (SOC 2) of the energy storage battery is smaller than SOC3, the power grid and the direct current photovoltaic supply power to the energy storage battery at the same time, and active power P=Min (P6W 4-P3, P5) of the energy storage converter is issued, namely the active power transmitted in the energy storage converter pair is controlled to be the minimum value of the difference between the actual charging power of the energy storage battery and the discharging power of the photovoltaic module compared with the maximum discharging power of the battery;
When the energy storage battery SOC2 is positioned between the SOC3 and the SOC1, the direct current photovoltaic supplements electricity for the energy storage battery, and the active power P=0 of the energy storage converter is issued;
When the energy storage battery SOC2> =soc1, the active power value of the energy storage converter is issued and set to convert the direct current generated by the direct current photovoltaic module into alternating current, the alternating current is preferentially used by a local alternating current load, the active power p=min (P4×w1, P3×w3) of the energy storage converter is issued, namely, the required power of the alternating current load is obtained, the required power is compared with the actual discharge power of the photovoltaic module, and the minimum value of the required power and the actual discharge power is taken as the active power externally output by the energy storage converter.
6. And when the valley electricity or the flat electricity time is not effectively consumed by the photovoltaic power generation, P3 is larger than P6 and P4, and the direct current photovoltaic limit power value P=P6+P4 is issued.
Referring to fig. 3, a third embodiment of the present invention is as follows:
A terminal 1 for reducing the photovoltaic light rejection rate comprises a memory 2, a processor 3 and a computer program stored on the memory 2 and executable on the processor 3, wherein the steps in the method for reducing the photovoltaic light rejection rate in any one of the first to second embodiments are completed when the processor executes the computer program.
In summary, according to the method and the terminal for reducing the photovoltaic light rejection rate provided by the invention, the transmission state of the energy storage converter is controlled by detecting the power consumption peak Gu Ouduan, and the active power of the energy storage converter is regulated in real time according to the charge state of the energy storage battery, so that the working state of the photovoltaic module is regulated according to the active power transmitted by the energy storage converter, excessive power generation of the photovoltaic module is avoided, the light rejection rate is reduced, and the residual electricity is not on the internet.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent changes made by the specification and drawings of the present invention, or direct or indirect application in the relevant art, are included in the scope of the present invention.
Claims (6)
1. A method for reducing photovoltaic light rejection, characterized by: the method comprises the following steps:
s1, detecting a power consumption peak Gu Ouduan and the charge state of an energy storage battery;
S2, adjusting the active power of the energy storage converter according to the power consumption peak Gu Ouduan and the charge state of the energy storage battery;
s3, adjusting the working state of the photovoltaic module according to the active power of the energy storage converter;
The step S2 specifically comprises the following steps:
S21, acquiring a power consumption peak Gu Ouduan, and if the power consumption peak Gu Ouduan is a peak power section, entering a step S22; otherwise, step S23 is entered;
S22, calculating actual discharge power of the energy storage battery according to the charge state of the energy storage battery, and controlling the active power externally output by the energy storage converter to be the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic module;
s23, calculating actual charging power of the energy storage battery according to the charge state of the energy storage battery, and controlling the active power transmitted in the energy storage converter pair to be the difference between the actual charging power of the energy storage battery and the discharging power of the photovoltaic module;
The step S23 specifically includes:
S231, setting a first charge value and a second charge value, wherein the first charge value is larger than the second charge value, comparing the charge state of the energy storage battery with the first charge value and the second charge value, and if the charge state of the energy storage battery is smaller than the second charge value, entering step S232; if the state of charge of the energy storage battery is between the first charge value and the second charge value, step S233 is entered; otherwise, step S234 is entered;
S232, controlling an external power grid and the photovoltaic module to supplement electricity to the energy storage battery at the same time, and controlling the active power transmitted by the energy storage converter to be the difference between the actual charging power of the energy storage battery and the discharging power of the photovoltaic module;
s233, independently controlling the photovoltaic module to supplement electricity to the energy storage battery, and controlling the active power of the energy storage converter to be zero;
S234, directly transmitting the electric energy generated by the photovoltaic module to the energy storage converter, and controlling the active power externally transmitted by the energy storage converter to be the actual discharge power of the photovoltaic module.
2. A method of reducing photovoltaic light rejection according to claim 1, wherein: the step S234 further includes the steps of:
and obtaining the alternating current load demand power, comparing the alternating current load demand power with the actual discharge power of the photovoltaic module, and taking the minimum value of the alternating current load demand power and the actual discharge power as the active power externally output by the energy storage converter.
3. A method of reducing photovoltaic light rejection according to claim 1, wherein: the step S22 further includes the steps of:
and obtaining the alternating current load demand power, comparing the alternating current load demand power with the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic module, and taking the minimum value of the alternating current load demand power and the sum as the active power externally output by the energy storage converter.
4. A terminal for reducing photovoltaic light rejection rate, characterized in that: comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, the processor performing the following steps when the computer program is executed:
s1, detecting a power consumption peak Gu Ouduan and the charge state of an energy storage battery;
S2, adjusting the active power of the energy storage converter according to the power consumption peak Gu Ouduan and the charge state of the energy storage battery;
s3, adjusting the working state of the photovoltaic module according to the active power of the energy storage converter;
The step S2 specifically comprises the following steps:
S21, acquiring a power consumption peak Gu Ouduan, and if the power consumption peak Gu Ouduan is a peak power section, entering a step S22; otherwise, step S23 is entered;
S22, calculating actual discharge power of the energy storage battery according to the charge state of the energy storage battery, and controlling the active power externally output by the energy storage converter to be the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic module;
s23, calculating actual charging power of the energy storage battery according to the charge state of the energy storage battery, and controlling the active power transmitted in the energy storage converter pair to be the difference between the actual charging power of the energy storage battery and the discharging power of the photovoltaic module;
The step S23 specifically includes:
S231, setting a first charge value and a second charge value, wherein the first charge value is larger than the second charge value, comparing the charge state of the energy storage battery with the first charge value and the second charge value, and if the charge state of the energy storage battery is smaller than the second charge value, entering step S232; if the state of charge of the energy storage battery is between the first charge value and the second charge value, step S233 is entered; otherwise, step S234 is entered;
S232, controlling an external power grid and the photovoltaic module to supplement electricity to the energy storage battery at the same time, and controlling the active power transmitted by the energy storage converter to be the difference between the actual charging power of the energy storage battery and the discharging power of the photovoltaic module;
s233, independently controlling the photovoltaic module to supplement electricity to the energy storage battery, and controlling the active power of the energy storage converter to be zero;
S234, directly transmitting the electric energy generated by the photovoltaic module to the energy storage converter, and controlling the active power externally transmitted by the energy storage converter to be the actual discharge power of the photovoltaic module.
5. A terminal for reducing photovoltaic light rejection rate according to claim 4, characterized in that: the step S234 further includes the steps of:
and obtaining the alternating current load demand power, comparing the alternating current load demand power with the actual discharge power of the photovoltaic module, and taking the minimum value of the alternating current load demand power and the actual discharge power as the active power externally output by the energy storage converter.
6. A terminal for reducing photovoltaic light rejection rate according to claim 4, characterized in that: the step S22 further includes the steps of:
and obtaining the alternating current load demand power, comparing the alternating current load demand power with the sum of the actual discharge power of the energy storage battery and the discharge power of the photovoltaic module, and taking the minimum value of the alternating current load demand power and the sum as the active power externally output by the energy storage converter.
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