A method and terminal for a photovoltaic storage charging and testing system compatible with industrial and commercial electricity demand

Abstract

The present invention discloses a method and terminal for making a photovoltaic, storage, charging and inspection system compatible with industrial and commercial electricity demand. The method comprises the following steps: obtaining the collected power of an alternating current (AC) meter and the real-time power of an energy storage converter, and calculating the real-time power of the industrial and commercial load based on the collected power of the AC meter and the real-time power of the energy storage converter; detecting the power consumption period; if the power consumption period is a peak period, determining whether there is a charging demand in the photovoltaic, storage, charging and inspection system; if there is no charging demand, controlling the energy storage battery in the photovoltaic, storage, charging and inspection system to supply power to the industrial and commercial load according to the real-time power of the industrial and commercial load; and determining whether there is a charging demand in the photovoltaic, storage, charging and inspection system; if there is a charging demand, controlling the front-end transformer to meet the real-time power of the industrial and commercial load and then jointly meeting the charging demand with the energy storage battery in the photovoltaic, storage, charging and inspection system.

Description

Technical Field

[0001] The present invention relates to the field of energy storage, and in particular to a method and terminal for a photovoltaic storage, charging and testing system to be compatible with industrial and commercial electricity demand. Background Art

[0002] With the continuous development of the energy storage industry in recent years, various energy storage forms have emerged, such as pumped hydro, compressed air, flywheel, and electrochemical storage. Among these, commercial and industrial energy storage and photovoltaic (PV) storage and charging systems are two of the more common and typical forms of energy storage. Commercial and industrial energy storage utilizes peak load shifting to fill valleys, using grid power to top up the energy storage battery during valley hours. During peak hours, the battery power is discharged to customer AC loads (such as buildings and critical equipment). Discharge to the grid is prohibited under normal circumstances, capitalizing on the peak-valley power difference. The main equipment used is the energy storage battery and PCS. PV storage and charging systems differ in that they utilize a DC bus architecture with the addition of a DC-DC converter and charging stations. The energy storage battery only charges the charging stations and does not supply power to the grid or customer loads.

[0003] Most existing technologies are independent of each other in industrial and commercial energy storage and photovoltaic energy storage and charging system solutions, and do not consider the system application of photovoltaic energy storage and charging systems that are compatible with industrial and commercial energy storage. That is, photovoltaic energy storage and charging systems are used solely to charge electric vehicles, and do not consider the use scenarios of discharging to the power grid or industrial and commercial energy storage customer loads. Even if the PCS configured in it has bidirectional charging and discharging functions, it is generally only used to charge batteries. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method and terminal for a photovoltaic storage charging and inspection system to be compatible with industrial and commercial electricity demand, thereby solving the problem that the photovoltaic storage charging and inspection system is not compatible with industrial and commercial electricity demand.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A method for making a photovoltaic, storage, charging, and inspection system compatible with industrial and commercial electricity demand is applied to a photovoltaic, storage, charging, and inspection architecture. The photovoltaic, storage, charging, and inspection architecture includes a front-end transformer, an industrial and commercial load, an AC meter, and an energy storage converter. The front-end transformer is electrically connected to an external power grid, the energy storage converter and the industrial and commercial load are respectively electrically connected to the front-end transformer, and the AC meter is used to collect power data output by the front-end transformer.

[0007] The method comprises the steps of:

[0008] S1. Obtain the collected power of the AC meter and the real-time power of the energy storage converter, and calculate the real-time power of the industrial and commercial load based on the collected power of the AC meter and the real-time power of the energy storage converter;

[0009] S2. Detect the power consumption period. If the power consumption period is peak time, execute step S3; if the power consumption period is off-peak time, execute step S4;

[0010] S3. Determine whether there is a charging demand in the solar-storage-charging-detection system. If there is no charging demand, control the energy storage battery in the solar-storage-charging-detection system to supply power to the industrial and commercial load according to the real-time power of the industrial and commercial load;

[0011] S4. Determine whether there is a charging demand in the photovoltaic storage charging and inspection system. If there is a charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load and then combine with the energy storage battery in the photovoltaic storage charging and inspection system to meet the charging demand.

[0012] In order to solve the above technical problems, another technical solution adopted by the present invention is:

[0013] A terminal for a photovoltaic storage, charging, and inspection system compatible with industrial and commercial electricity demand includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps of a method for a photovoltaic storage, charging, and inspection system compatible with industrial and commercial electricity demand are completed.

[0014] The beneficial effects of the present invention include at least: providing a method and terminal for making a photovoltaic, storage, charging, and inspection system compatible with industrial and commercial electricity demand, by connecting an industrial and commercial load between a front-end transformer and an energy storage converter, and utilizing the regulation functions of the front-end transformer and the energy storage converter to jointly meet the electricity demand of the industrial and commercial load; in the execution step, the real-time power required by the industrial and commercial load is calculated by collecting power data output by the front-end transformer and the real-time power of the energy storage converter through an AC meter, and adopting different control strategies for peak and valley periods of electricity consumption, specifically:

[0015] During peak electricity consumption, the principle is to reduce the power supply from the external power grid. When there is no charging demand for the photovoltaic storage charging and inspection system, the energy storage batteries in the photovoltaic storage charging and inspection system are mainly used to power the industrial and commercial loads, thereby reducing the electricity costs of the industrial and commercial loads. During valley electricity consumption, the principle is to give priority to the use of the external power grid. After ensuring that the demand for industrial and commercial loads is met, the front-end transformer is used to combine the surplus power with the energy storage battery to meet the charging demand of the photovoltaic storage charging and inspection system. The above method improves the utilization rate of the front-end transformer, and at the same time achieves the compatibility of the photovoltaic storage charging and inspection system with the electricity demand of industrial and commercial loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a flow chart of a method for a photovoltaic storage charging and testing system to be compatible with industrial and commercial electricity demand in an embodiment of the present invention;

[0017] Figure 2 This is a flow chart of peak power consumption control in a method for a photovoltaic storage charging and testing system compatible with industrial and commercial power demand in an embodiment of the present invention;

[0018] Figure 3 This is a flow chart of off-peak electricity consumption control in a method for a photovoltaic storage charging and testing system to be compatible with industrial and commercial electricity demand in an embodiment of the present invention;

[0019] Figure 4 This is a flowchart of normal power consumption control in a method for a photovoltaic storage charging and testing system to be compatible with industrial and commercial power demand in an embodiment of the present invention;

[0020] Figure 5 This is an architecture diagram of a solar-storage-charging-inspection system compatible with industrial and commercial electricity needs in an embodiment of the present invention;

[0021] Figure 6 A schematic diagram of a terminal compatible with industrial and commercial electricity demand in a photovoltaic storage charging and testing system according to an embodiment of the present invention;

[0022] Description of labels:

[0023] 1. A terminal for an optical storage, charging, and inspection system that is compatible with industrial and commercial electricity needs; 2. Memory; 3. Processor. DETAILED DESCRIPTION

[0024] To illustrate the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and accompanying drawings.

[0025] Please refer to Figure 1 and Figure 5 A method for making a photovoltaic, storage, charging, and inspection system compatible with industrial and commercial electricity demand is characterized in that: the method for making a photovoltaic, storage, charging, and inspection system compatible with industrial and commercial electricity demand is applied to a photovoltaic, storage, charging, and inspection architecture, the photovoltaic, storage, charging, and inspection architecture comprising a front-end transformer, an industrial and commercial load, an AC meter, and an energy storage converter, the front-end transformer being electrically connected to an external power grid, the energy storage converter and the industrial and commercial load being electrically connected to the front-end transformer, and the AC meter being used to collect power data output by the front-end transformer;

[0026] The method comprises the steps of:

[0027] S1. Obtain the collected power of the AC meter and the real-time power of the energy storage converter, and calculate the real-time power of the industrial and commercial load based on the collected power of the AC meter and the real-time power of the energy storage converter;

[0028] S2. Detect the power consumption period. If the power consumption period is peak time, execute step S3; if the power consumption period is off-peak time, execute step S4;

[0029] S3. Determine whether there is a charging demand in the solar-storage-charging-detection system. If there is no charging demand, control the energy storage battery in the solar-storage-charging-detection system to supply power to the industrial and commercial load according to the real-time power of the industrial and commercial load;

[0030] S4. Determine whether there is a charging demand in the photovoltaic storage charging and inspection system. If there is a charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load and then combine with the energy storage battery in the photovoltaic storage charging and inspection system to meet the charging demand.

[0031] As can be seen from the above description, the beneficial effects of the present invention are: by connecting the industrial and commercial load between the front-end transformer and the energy storage converter, the regulation functions of the front-end transformer and the energy storage converter are utilized to jointly meet the power demand of the industrial and commercial load; in the execution step, the real-time power required by the industrial and commercial load is calculated by collecting the power data output by the front-end transformer and the real-time power of the energy storage converter through the AC meter, and different control strategies are adopted for peak and valley periods of electricity consumption, specifically:

[0032] During peak electricity consumption, the principle is to reduce the power supply from the external power grid. When there is no charging demand for the photovoltaic storage charging and inspection system, the energy storage batteries in the photovoltaic storage charging and inspection system are mainly used to power the industrial and commercial loads, thereby reducing the electricity costs of the industrial and commercial loads. During valley electricity consumption, the principle is to give priority to the use of the external power grid. After ensuring that the demand for industrial and commercial loads is met, the front-end transformer is used to combine the surplus power with the energy storage battery to meet the charging demand of the photovoltaic storage charging and inspection system. The above method improves the utilization rate of the front-end transformer, and at the same time achieves the compatibility of the photovoltaic storage charging and inspection system with the electricity demand of industrial and commercial loads.

[0033] In an embodiment of the present invention, step S1 specifically includes the following steps:

[0034] Get the collected power P of the AC meter m and the real-time power P of the energy storage converter a , calculate the real-time power P of the industrial and commercial load according to the following formula f =P m -P a .

[0035] As can be seen from the above description, since the power demand of industrial and commercial loads changes in real time, direct measurement is difficult. Therefore, the power data of the front-end transformer and energy storage converter are used for calculation. The specific principle is: in actual use, the power of the front-end transformer is first guaranteed to be used for the customer's AC load, and the remaining part is then given to the photovoltaic energy storage system. That is, the power output of the front-end transformer collected by the AC meter is supplied to the photovoltaic energy storage system and the industrial and commercial load. The difference between the two can be used to obtain the real-time power P of the industrial and commercial load. f .

[0036] Please refer to Figure 2 In an embodiment of the present invention, step S3 specifically includes the following steps:

[0037] S31, obtaining the state of charge of the energy storage battery in the solar storage charging and testing system. If the state of charge meets the preset threshold, proceed to step S32; otherwise, proceed to step S33;

[0038] S32. Determine whether there is a charging demand in the solar-storage-charging-detection system. If there is no charging demand, control the energy storage battery in the solar-storage-charging-detection system to supply power to the industrial and commercial load according to the real-time power of the industrial and commercial load;

[0039] S33. Determine whether there is a charging demand in the photovoltaic storage charging and inspection system. If there is a charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load and then meet the charging demand of the photovoltaic storage charging and inspection system.

[0040] From the above description, we can see that since the energy storage battery of the photovoltaic storage charging and inspection system has a poor state of charge, different control strategies are adopted for the energy storage battery with sufficient state of charge and poor state of charge. Specifically:

[0041] When it is peak time and the energy storage battery has sufficient charge state, step S32 specifically includes the following steps:

[0042] S321. Determine whether there is a charging demand in the solar-storage charging and inspection system. If there is a charging demand, control the energy storage battery of the solar-storage charging and inspection system to preferentially meet the charging demand; if there is no charging demand, proceed to the next step;

[0043] S322, determine the maximum transmission power P of the energy storage battery b Can it meet the real-time power P of industrial and commercial loads? f , if it can be satisfied, then the transmission power of the energy storage battery is controlled to be equal to P f If it cannot be satisfied, the energy storage battery is controlled to transmit at the maximum power P b It transmits power and combines with the front-end transformer to obtain power from the external power grid.

[0044] That is, the principle is to give priority to meeting the charging demand in the system with the solar storage charging and inspection system. When there is no charging demand in the system, the power of the solar storage charging and inspection system is used to supply power to the industrial and commercial loads. During the process, if P b Unable to meet P f , the energy storage battery is controlled to operate at the maximum transmission power, and the surplus power is supplemented by the front-end transformer from the external power grid, reducing the cost of peak electricity consumption.

[0045] Preferably, the step S322 further includes the steps of:

[0046] When it is detected that the solar storage charging and detection system is supplying power to the industrial and commercial load, the collected power P of the AC meter is detected in real time. m If P is detected m If the value is less than 0 and the duration exceeds the preset time, an alarm will be triggered.

[0047] From the above description, it can be seen that when the solar storage charging and detection system discharges to the outside, it detects in real time whether reverse current occurs. If a reverse current fault occurs, the discharge is stopped to prevent the remaining power from being connected to the grid. Specifically, the preset duration range is 8-15s, preferably 10s.

[0048] When the energy storage battery is in a low state of charge during peak hours, step S33 specifically includes the following steps:

[0049] S331. Obtain the maximum transmission power P of the front-end transformer t ;

[0050] S332: Calculate and obtain the maximum power P that the front-end transformer can supply to the solar storage charging and testing system at the current stage. g =P t -(P m -P a );

[0051] S333: Determine the maximum power P supplied to the optical storage charging and testing system. g Whether the requested power P can meet the charging demand v If it cannot be satisfied, the output power of the optical storage charging and detection system is limited to P g If it can be satisfied, then the output power of the optical storage charging and detection system is limited to P v .

[0052] From the above description, it can be seen that when the peak time is high and the state of charge of the energy storage battery is not good, the front-end transformer can only be used to charge the industrial and commercial loads and the photovoltaic storage charging and testing system. The implementation principle is that the output power of the front-end transformer is prioritized to meet the industrial and commercial loads, and the surplus power is used to charge the photovoltaic storage charging and testing system. When the surplus power is not enough to meet the charging demand of the photovoltaic storage charging and testing system, the output power of the photovoltaic storage charging and testing system is limited to P g .

[0053] Please refer to Figure 3 In an embodiment of the present invention, step S4 specifically includes the following steps:

[0054] S41, obtaining the state of charge of the energy storage battery in the solar storage charging and testing system. If the state of charge meets the preset threshold, proceed to step S42; otherwise, proceed to step S43;

[0055] S42: Determine whether there is a charging demand in the photovoltaic storage charging and inspection system. If there is a charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load and then combine it with the energy storage battery in the photovoltaic storage charging and inspection system to jointly meet the charging demand;

[0056] S43. Determine whether there is a charging demand in the solar-storage-charging-detection system. If there is a charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load before meeting the charging demand. If there is no charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load before charging the energy storage battery.

[0057] From the above description, we can see that since the energy storage battery of the photovoltaic storage charging and inspection system has a poor state of charge, different control strategies are adopted for the energy storage battery with sufficient state of charge and poor state of charge. Specifically:

[0058] When it is valley time and the state of charge of the energy storage battery is sufficient, step S42 specifically includes the following steps:

[0059] S421. Obtain the maximum transmission power P of the front-end transformer t ;

[0060] S422: Calculate and obtain the maximum power P that the front-end transformer can supply to the solar storage charging and testing system at the current stage. g =P t -(P m -P a );

[0061] S423: Determine the maximum power P supplied to the optical storage charging and testing system. g and the maximum transmission power P of the energy storage battery b Whether the sum can meet the required power P of the charging demand v If it cannot be satisfied, the output power of the optical storage charging and detection system is limited to P g +P b If it can be satisfied, then the output power of the optical storage charging and detection system is limited to P v .

[0062] That is, at the current stage, due to the low electricity price, the external grid is used for power supply first, and the energy storage battery of the photovoltaic storage charging and inspection system is prohibited from supplying power to the industrial and commercial loads. That is, after the front-end transformer is used to meet the demand of the industrial and commercial loads, how much surplus power can be supplied to the photovoltaic storage charging and inspection system (P g ), and then calculate P g +P b Whether the charging demand can be met and adjustments are made according to step S423.

[0063] When it is valley time and the state of charge of the energy storage battery is not good, the step S43 specifically includes the following steps:

[0064] S431, determine whether there is a charging demand in the optical storage charging detection system. If there is no charging demand, control the front-end transformer to charge the energy storage battery and control the charging power to be equal to P g; If there is a need for charging, proceed to the next step;

[0065] S432: Determine the maximum power P supplied to the optical storage charging and testing system. g Whether the requested power P can meet the charging demand v If it cannot be satisfied, the output power of the optical storage charging and detection system is limited to P g If the demand can be met, the output power of the optical storage charging and detection system is limited to P v , and use the remaining electricity to charge the energy storage battery.

[0066] From the above description, we can see that at this stage, the energy storage battery cannot supply power and relies entirely on the power transmission of the external power grid. The specific control process is to control the front-end transformer to give priority to meeting the industrial and commercial loads and transmit the remaining power to the photovoltaic storage charging and testing system. During the process, if P g If the charging demand can be met, the remaining power will be used to charge the energy storage battery.

[0067] Please refer to Figure 6 A terminal for a photovoltaic storage, charging, and inspection system compatible with industrial and commercial electricity needs includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the steps in a method for making a photovoltaic storage, charging, and inspection system compatible with industrial and commercial electricity needs are completed.

[0068] The present invention provides a method and terminal for a photovoltaic storage charging and testing system to be compatible with industrial and commercial electricity demand, which is mainly used for the photovoltaic storage charging and testing system to supply power to industrial and commercial loads. The following is a detailed description with reference to an embodiment:

[0069] Please refer to Figure 1 and Figure 5 , embodiment 1 of the present invention is:

[0070] A method for making a photovoltaic, storage, charging, and inspection system compatible with industrial and commercial electricity demand, characterized in that: the method for making a photovoltaic, storage, charging, and inspection system compatible with industrial and commercial electricity demand is applied to a photovoltaic, storage, charging, and inspection architecture, the photovoltaic, storage, charging, and inspection architecture comprising a front-end transformer, an industrial and commercial load, an AC meter, and an energy storage converter, the front-end transformer being electrically connected to an external power grid, the energy storage converter and the industrial and commercial load being electrically connected to the front-end transformer, and the AC meter being used to collect power data output by the front-end transformer;

[0071] The method comprises the steps of:

[0072] S1. Obtain the collected power of the AC meter and the real-time power of the energy storage converter, and calculate the real-time power of the industrial and commercial load based on the collected power of the AC meter and the real-time power of the energy storage converter;

[0073] S2. Detect the power consumption period. If the power consumption period is peak time, execute step S3; if the power consumption period is off-peak time, execute step S4;

[0074] S3. Determine whether there is a charging demand in the solar-storage-charging-inspection system. If there is no charging demand, control the energy storage batteries in the solar-storage-charging-inspection system to supply power to the industrial and commercial loads according to the real-time power of the industrial and commercial loads;

[0075] S4. Determine whether there is a charging demand in the photovoltaic storage charging and inspection system. If there is a charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load and then combine with the energy storage battery in the photovoltaic storage charging and inspection system to meet the charging demand.

[0076] That is, in this embodiment, by connecting the industrial and commercial load between the front-end transformer and the energy storage converter, the regulation functions of the front-end transformer and the energy storage converter are utilized to jointly meet the power demand of the industrial and commercial load. In the execution step, the real-time power required by the industrial and commercial load is calculated by collecting the power data output by the front-end transformer and the real-time power of the energy storage converter through the AC meter. Different control strategies are adopted for peak and valley periods of electricity consumption, specifically:

[0077] During peak electricity consumption, the principle is to reduce the power supply from the external power grid. When there is no charging demand for the photovoltaic storage charging and inspection system, the energy storage batteries in the photovoltaic storage charging and inspection system are mainly used to power the industrial and commercial loads, thereby reducing the electricity costs of the industrial and commercial loads. During valley electricity consumption, the principle is to give priority to the use of the external power grid. After ensuring that the demand for industrial and commercial loads is met, the front-end transformer is used to combine the surplus power with the energy storage battery to meet the charging demand of the photovoltaic storage charging and inspection system. The above method improves the utilization rate of the front-end transformer, and at the same time achieves the compatibility of the photovoltaic storage charging and inspection system with the electricity demand of industrial and commercial loads.

[0078] The second embodiment of the present invention is:

[0079] Based on the first embodiment, step S1 specifically includes the following steps:

[0080] Get the collected power P of the AC meter m and the real-time power P of the energy storage converter a , calculate the real-time power P of the industrial and commercial load according to the following formula f =P m -P a In actual use, the power of the front-end transformer is first guaranteed to be used for the customer's AC load, and the remaining part is then given to the photovoltaic storage and energy storage system. That is, the power output of the front-end transformer collected by the AC meter is supplied to the photovoltaic storage and energy storage system and the industrial and commercial load. The difference between the two can be used to obtain the real-time power P of the industrial and commercial load. f .

[0081] Please refer to Figure 2 , the third embodiment of the present invention is:

[0082] Based on the second embodiment, step S3 specifically includes the following steps:

[0083] S31, obtaining the state of charge of the energy storage battery in the solar storage charging and testing system. If the state of charge meets the preset threshold, proceed to step S32; otherwise, proceed to step S33;

[0084] When it is peak time and the energy storage battery has sufficient charge state, step S32 specifically includes the following steps:

[0085] S321. Determine whether there is a charging demand in the solar-storage charging and inspection system. If there is a charging demand, control the energy storage battery of the solar-storage charging and inspection system to preferentially meet the charging demand; if there is no charging demand, proceed to the next step;

[0086] S322, determine the maximum transmission power P of the energy storage battery b Can it meet the real-time power P of industrial and commercial loads? f , if it can be satisfied, then the transmission power of the energy storage battery is controlled to be equal to P f If it cannot be satisfied, the energy storage battery is controlled to transmit at the maximum power P b It transmits power and combines with the front-end transformer to obtain power from the external power grid.

[0087] That is, the principle is to give priority to meeting the charging demand in the system with the solar storage charging and inspection system. When there is no charging demand in the system, the power of the solar storage charging and inspection system is used to supply power to the industrial and commercial loads. During the process, if P b Unable to meet P f , the energy storage battery is controlled to operate at the maximum transmission power, and the surplus power is supplemented by the front-end transformer from the external power grid, reducing the cost of peak electricity consumption.

[0088] Specifically, step S322 further includes the following steps:

[0089] When it is detected that the solar storage charging and detection system is supplying power to the industrial and commercial load, the AC meter’s collected power P is detected in real time. m If P is detected m If the value is less than 0 and the duration exceeds the preset time, an alarm will be triggered.

[0090] From the above description, it can be seen that when the solar storage charging and detection system discharges to the outside, it detects in real time whether reverse current occurs. If a reverse current fault occurs, the discharge is stopped to prevent the remaining power from being connected to the grid.

[0091] When it is peak time and the state of charge of the energy storage battery is not good, step S33 specifically includes the following steps:

[0092] S331. Obtain the maximum transmission power P of the front-end transformer t ;

[0093] S332. Calculate and obtain the maximum power P that the front-end transformer can supply to the solar storage charging and testing system at the current stage. g =P t -(Pm -P a );

[0094] S333: Determine the maximum power P supplied to the optical storage charging and testing system g Whether the requested power P can meet the charging demand v If it cannot be satisfied, the output power of the optical storage charging and detection system is limited to P g If it can be satisfied, then the output power of the optical storage charging and detection system is limited to P v .

[0095] From the above description, it can be seen that when the peak time is high and the state of charge of the energy storage battery is not good, the front-end transformer can only be used to charge the industrial and commercial loads and the photovoltaic storage charging and testing system. The implementation principle is that the output power of the front-end transformer is prioritized to meet the industrial and commercial loads, and the surplus power is used to charge the photovoltaic storage charging and testing system. When the surplus power is not enough to meet the charging demand of the photovoltaic storage charging and testing system, the output power of the photovoltaic storage charging and testing system is limited to P g .

[0096] Please refer to Figure 3 , the fourth embodiment of the present invention is:

[0097] On the basis of the second embodiment, in the embodiment of the present invention, step S4 specifically includes the following steps:

[0098] S41, obtaining the state of charge of the energy storage battery in the solar storage charging and testing system. If the state of charge meets the preset threshold, proceed to step S42; otherwise, proceed to step S43;

[0099] When it is valley time and the state of charge of the energy storage battery is sufficient, step S42 specifically includes the following steps:

[0100] S421. Obtain the maximum transmission power P of the front-end transformer t ;

[0101] S422. Calculate and obtain the maximum power P that the front-end transformer can supply to the solar storage charging and testing system at the current stage. g =P t -(P m -P a );

[0102] S423: Determine the maximum power P supplied to the optical storage charging and testing system g and the maximum transmission power P of the energy storage battery b Whether the sum can meet the charging demand power P v If it cannot be satisfied, the output power of the optical storage charging and detection system is limited to P g +P b If it can be satisfied, then the output power of the optical storage charging and detection system is limited to P v .

[0103] That is, at the current stage, due to the low electricity price, the external grid is used for power supply first, and the energy storage battery of the photovoltaic storage charging and inspection system is prohibited from supplying power to the industrial and commercial loads. That is, after the front-end transformer is used to meet the demand of the industrial and commercial loads, how much surplus power can be supplied to the photovoltaic storage charging and inspection system (P g ), and then calculate P g +P b Whether the charging demand can be met and adjustments are made according to step S423.

[0104] When it is valley time and the state of charge of the energy storage battery is not good, step S43 specifically includes the following steps:

[0105] S431, determine whether there is a charging demand in the solar storage charging detection system. If there is no charging demand, control the front-end transformer to charge the energy storage battery and control the charging power to be equal to P g ; If there is a need for charging, proceed to the next step;

[0106] S432: Determine the maximum power P supplied to the optical storage charging and testing system g Whether the requested power P can meet the charging demand v If it cannot be satisfied, the output power of the optical storage charging and detection system is limited to P g If the demand can be met, the output power of the optical storage charging and detection system is limited to P v , and use the remaining electricity to charge the energy storage battery.

[0107] That is, the energy storage battery cannot supply power at the current stage and relies entirely on the power transmission of the external power grid. The specific control process is to control the front-end transformer to give priority to meeting the industrial and commercial loads and transmit the remaining power to the photovoltaic storage charging and testing system. During the process, if P g If the charging demand can be met, the remaining power will be used to charge the energy storage battery.

[0108] Please refer to Figure 4 , the fifth embodiment of the present invention is:

[0109] On the basis of the second embodiment, step S2 further includes the following steps: if the electricity usage period is normal (normal electricity period), then executing step S5:

[0110] S51, obtaining the state of charge of the energy storage battery in the solar storage charging and testing system. If the state of charge meets the preset threshold, proceed to step S52; otherwise, proceed to step S53;

[0111] When the energy storage battery is normally charged and the state of charge is sufficient, step S52 specifically includes the following steps:

[0112] S521. Determine whether there is a charging demand in the solar-storage charging and inspection system. If there is a charging demand, control the energy storage battery of the solar-storage charging and inspection system to preferentially meet the charging demand; if there is no charging demand, proceed to the next step;

[0113] S522: Determine the maximum transmission power P of the energy storage battery. b Can it meet the real-time power P of industrial and commercial loads? f , if it can be satisfied, then the transmission power of the energy storage battery is controlled to be equal to P f If it cannot be satisfied, the energy storage battery is controlled to transmit at the maximum power P b It transmits power and combines with the front-end transformer to obtain power from the external power grid.

[0114] That is, the principle is to give priority to meeting the charging demand in the system with the solar storage charging and inspection system. When there is no charging demand in the system, the power of the solar storage charging and inspection system is used to supply power to the industrial and commercial loads. During the process, if P b Unable to meet P f , the energy storage battery is controlled to operate at the maximum transmission power, and the surplus power is supplemented by the front-end transformer from the external power grid, reducing the cost of normal electricity consumption.

[0115] Preferably, step S522 further includes the steps of:

[0116] When it is detected that the solar storage charging and detection system is supplying power to the industrial and commercial load, the AC meter’s collected power P is detected in real time. m If P is detected m If the value is less than 0 and the duration exceeds the preset time, an alarm will be triggered.

[0117] From the above description, it can be seen that when the solar storage charging and detection system discharges to the outside, it detects in real time whether reverse current occurs. If a reverse current fault occurs, the discharge is stopped to prevent the remaining power from being connected to the grid.

[0118] When the state of charge of the energy storage battery is poor, step S53 specifically includes the following steps:

[0119] S531. Obtain the maximum transmission power P of the front-end transformer t ;

[0120] S532. Calculate and obtain the maximum power P that the front-end transformer can supply to the solar storage charging and testing system at the current stage. g =P t -(P m -P a );

[0121] S533: Determine the maximum power P supplied to the optical storage charging and testing system g Whether the requested power P can meet the charging demand v If it cannot be satisfied, the output power of the optical storage charging and detection system is limited to Pg If it can be satisfied, then the output power of the optical storage charging and detection system is limited to P v .

[0122] S534: If it is detected that there is no charging demand in the solar storage charging detection system, then g Charge the energy storage battery.

[0123] During normal times and when the energy storage battery is not in good charge state, only the front-end transformer can be used to charge the industrial and commercial loads and the photovoltaic storage charging and testing system. The implementation principle is that the output power of the front-end transformer is prioritized to meet the industrial and commercial loads, and the surplus power is used to charge the photovoltaic storage charging and testing system. When the surplus power is not enough to meet the charging demand of the photovoltaic storage charging and testing system, the output power of the photovoltaic storage charging and testing system is limited to P g .

[0124] Please refer to Figure 6 , embodiment six of the present invention is: a terminal 1 for a photovoltaic storage, charging, and inspection system compatible with industrial and commercial electricity needs, including a memory 2, a processor 3, and a computer program stored in the memory 2 and executable on the processor 3. When the processor 2 executes the computer program, the steps of any one of the methods for a photovoltaic storage, charging, and inspection system compatible with industrial and commercial electricity needs in embodiments one to five are completed.

[0125] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's description and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for making a solar-powered storage, charging, and testing system compatible with industrial and commercial electricity demand, characterized by: The method for making a photovoltaic storage charging and detection system compatible with industrial and commercial electricity demand is applied to a photovoltaic storage charging and detection architecture, which includes a front-end transformer, an industrial and commercial load, an AC meter, and an energy storage converter. The front-end transformer is electrically connected to an external power grid, the energy storage converter and the industrial and commercial load are electrically connected to the front-end transformer, and the AC meter is used to collect power data output by the front-end transformer. The method comprises the steps of: S1. Obtain the collected power of the AC meter and the real-time power of the energy storage converter, and calculate the real-time power of the industrial and commercial load based on the collected power of the AC meter and the real-time power of the energy storage converter; The step S1 specifically includes the following steps: Get the collected power of the AC meter and the real-time power of the energy storage converter , calculate the real-time power of industrial and commercial loads according to the following formula: ; S2. Detect the power consumption period. If the power consumption period is peak time, execute step S3; if the power consumption period is off-peak time, execute step S4; S3. Determine whether there is a charging demand in the solar-storage-charging-detection system. If there is no charging demand, control the energy storage battery in the solar-storage-charging-detection system to supply power to the industrial and commercial load according to the real-time power of the industrial and commercial load; The step S3 specifically includes the following steps: S31, obtaining the state of charge of the energy storage battery in the solar storage charging and testing system. If the state of charge meets the preset threshold, proceed to step S32; otherwise, proceed to step S33; S32. Determine whether there is a charging demand in the solar-storage-charging-detection system. If there is no charging demand, control the energy storage battery in the solar-storage-charging-detection system to supply power to the industrial and commercial load according to the real-time power of the industrial and commercial load; S33. Determine whether there is a charging demand in the solar-storage charging and inspection system. If there is a charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load to meet the charging demand of the solar-storage charging and inspection system; S4. Determine whether there is a charging demand in the photovoltaic storage charging and inspection system. If there is a charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load and then combine it with the energy storage battery in the photovoltaic storage charging and inspection system to jointly meet the charging demand; The step S4 specifically includes the following steps: S41, obtaining the state of charge of the energy storage battery in the solar storage charging and testing system. If the state of charge meets the preset threshold, proceed to step S42; Otherwise, proceed to step S43; S42: Determine whether there is a charging demand in the photovoltaic storage charging and inspection system. If there is a charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load and then combine it with the energy storage battery in the photovoltaic storage charging and inspection system to jointly meet the charging demand; S43. Determine whether there is a charging demand in the solar-storage-charging-detection system. If there is a charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load before meeting the charging demand. If there is no charging demand, control the front-end transformer to meet the real-time power of the industrial and commercial load before charging the energy storage battery.

2. The method for making a photovoltaic storage, charging, and testing system compatible with industrial and commercial electricity demand according to claim 1, characterized in that: The step S32 specifically includes the following steps: S321. Determine whether there is a charging demand in the solar-storage charging and inspection system. If there is a charging demand, control the energy storage battery of the solar-storage charging and inspection system to preferentially meet the charging demand; if there is no charging demand, proceed to the next step; S322. Determine the maximum transmission power of the energy storage battery Can it meet the real-time power requirements of industrial and commercial loads? , if it can be satisfied, then the transmission power of the energy storage battery is controlled to be equal to If it cannot be met, the energy storage battery is controlled to transmit at the maximum power It transmits power and combines with the front-end transformer to obtain power from the external power grid.

3. The method for making a photovoltaic storage, charging, and testing system compatible with industrial and commercial electricity demand according to claim 2, characterized in that: The step S322 further includes the following steps: When it is detected that the solar storage charging and detection system is supplying power to the industrial and commercial load, the power collected by the AC meter is detected in real time. If detected If the duration exceeds the preset time, an alarm will be triggered.

4. The method for making a photovoltaic storage, charging, and testing system compatible with industrial and commercial electricity demand according to claim 1, characterized in that: The step S33 specifically includes the following steps: S331. Obtain the maximum transmission power of the front-end transformer ; S332: Calculate and obtain the maximum power that the front-end transformer can supply to the solar storage charging and testing system at the current stage ; S333: Determine the maximum power supplied to the optical storage charging and testing system Whether the requested power can meet the charging demand If it cannot be satisfied, the output power of the optical storage charging and detection system is limited to If it can be satisfied, then the output power of the optical storage charging and detection system is limited to .

5. The method for making a photovoltaic storage, charging, and testing system compatible with industrial and commercial electricity demand according to claim 1, characterized in that: The step S42 specifically includes the following steps: S421. Obtain the maximum transmission power of the front-end transformer ; S422: Calculate and obtain the maximum power that the front-end transformer can supply to the solar energy storage charging and testing system at the current stage ; S423: Determine the maximum power supplied to the optical storage charging and testing system and the maximum transmission power of the energy storage battery Whether the sum can meet the required power of the charging demand If it cannot be satisfied, the output power of the optical storage charging and detection system is limited to If it can be satisfied, then the output power of the optical storage charging and detection system is limited to .

6. The method for making a photovoltaic storage, charging, and testing system compatible with industrial and commercial electricity demand according to claim 5, characterized in that: The step S43 specifically includes the following steps: S431, determine whether there is a charging demand in the light storage charging detection system, if there is no charging demand, control the front-end transformer to charge the energy storage battery, and control the charging power to be equal to ; If there is a need for charging, proceed to the next step; S432: Determine the maximum power supplied to the optical storage charging and testing system Whether the requested power can meet the charging demand If it cannot be satisfied, the output power of the optical storage charging and detection system is limited to If the demand can be met, the output power of the optical storage charging and detection system is limited to , and use the remaining electricity to charge the energy storage battery.

7. A terminal for an optical storage, charging, and inspection system compatible with industrial and commercial electricity needs, characterized by: The method comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the method completes the steps of the method for making a photovoltaic storage charging and testing system compatible with industrial and commercial electricity demand as described in any one of claims 1 to 6.

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