Reverse power control method and photovoltaic power generation system

Abstract

The invention relates to a reverse power control method and a photovoltaic power generation system, and the method comprises the steps: continuously obtaining the target power of a photovoltaic grid-connected point, and executing at least one mechanism in a first adjustment mechanism, a second adjustment mechanism and a third adjustment mechanism under the condition that the target power is not in a balance state, the working states of the energy storage module, the load module and the photovoltaic module are respectively adjusted to ensure that the output power of the photovoltaic module is dynamically matched with the operation power of the load module, source-load-storage three-party linkage regulation and control are realized based on an energy information network, reverse power is prevented, a full-amount self-generation and self-use grid-connected mode is met, and the power consumption is reduced. And the utilization rate of photovoltaic power generation is greatly improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a reverse power control method and a photovoltaic power generation system. Background Art

[0002] With the popularization of renewable energy and the development of the electricity market, photovoltaic power generation technology has been rapidly implemented at home and abroad. At present, the distributed photovoltaic power generation and access to the grid can be divided into three main modes: "full grid access", "self-generation and self-use, surplus power grid access" and "full self-generation and self-use". The first two modes are currently the relatively mainstream grid-connected modes, but as the developable capacity of the power grid has become smaller and smaller in recent years, the problem of photovoltaic power generation has become more and more obvious, so the demand for the "full self-generation and self-use" grid-connected mode has gradually emerged.

[0003] For the "full self-generation and self-use" grid-connected mode, if the reverse power phenomenon occurs in the photovoltaic power generation system where the power generated is greater than the load power consumption, it will cause the voltage of the power grid system and the photovoltaic power generation system to increase, thereby affecting the stability of the power grid and the quality of power supply. Long-term overvoltage operation will also cause damage to the photovoltaic power generation system equipment. Summary of the invention

[0004] Based on this, it is necessary to provide a reverse power control method and a photovoltaic power generation system to address the technical problem of reverse power phenomenon in the above photovoltaic power generation system.

[0005] A reverse power control method is applied to a photovoltaic power generation system including an energy storage module, a load module and a photovoltaic module, the method comprising:

[0006] Continuously obtain the target power of the photovoltaic grid-connected point;

[0007] When it is determined that the target power is not in a balanced state, at least one mechanism among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism is executed to dynamically match the output power of the photovoltaic module with the operating power of the load module;

[0008] The first regulating mechanism is used to regulate the working state of the energy storage module, the second regulating mechanism is used to regulate the working state of the load module, and the third regulating mechanism is used to control the working state of the photovoltaic module.

[0009] In an exemplary embodiment, when it is determined that the target power is not in a balanced state, executing at least one mechanism among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism includes:

[0010] When it is determined that the target power is not in a balanced state, at least one mechanism among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism is executed in a preset order.

[0011] In an exemplary embodiment, when it is determined that the target power is not in a balanced state, at least one mechanism is executed in a preset order among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism, including:

[0012] When it is determined that the target power is in a reverse power state, at least one of the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism is executed in the order;

[0013] When it is determined that the target power is in a power consumption state, at least one of the third adjustment mechanism, the second adjustment mechanism and the first adjustment mechanism is executed in this order.

[0014] In an exemplary embodiment, the first regulation mechanism includes a first reverse regulation mechanism;

[0015] Executing the first reverse regulation mechanism includes:

[0016] Acquiring stored energy of the energy storage module;

[0017] When the stored energy does not reach the energy upper limit threshold, the working mode of the energy storage module is set to the energy storage mode.

[0018] In an exemplary embodiment, the second regulation mechanism includes a second reverse regulation mechanism;

[0019] Executing the second reverse regulation mechanism includes:

[0020] Obtaining the load operating power of the load module;

[0021] When the load operating power does not reach the upper power limit threshold, the load operating power of the load module is increased.

[0022] In an exemplary embodiment, the third regulation mechanism includes a third reverse regulation mechanism;

[0023] Executing the third reverse regulation mechanism includes: limiting the power generation of the photovoltaic module.

[0024] In an exemplary embodiment, when it is determined that the target power is in a reverse power state, at least one of the first adjustment mechanism, the second adjustment mechanism, and the third adjustment mechanism is performed in the order of:

[0025] In the case of determining that the target power is in a reverse power state, executing the first reverse regulation mechanism;

[0026] When the stored energy reaches the energy upper limit threshold and it is determined that the target power is still in the reverse power state, executing the second reverse regulation mechanism;

[0027] When the load operating power reaches the upper power threshold and it is determined that the target power is still in the reverse power state, the third reverse regulation mechanism is executed.

[0028] In an exemplary embodiment, the first regulation mechanism comprises a first positive regulation mechanism;

[0029] Executing the first positive regulation mechanism includes:

[0030] Obtaining the working mode and stored energy of the energy storage module;

[0031] If the working mode of the energy storage module is not the energy storage mode, and the stored energy does not reach the energy lower limit threshold, setting the working mode of the energy storage module to the discharge mode;

[0032] If not, the energy storage module is controlled to stop running.

[0033] In an exemplary embodiment, the second regulation mechanism includes a second positive regulation mechanism;

[0034] Executing the second positive regulation mechanism includes:

[0035] Obtaining the load operating power of the load module;

[0036] When the load operating power does not reach the power lower limit threshold, the load operating power of the load module is lowered.

[0037] In an exemplary embodiment, the third regulation mechanism includes a third positive regulation mechanism;

[0038] Executing the third positive regulation mechanism includes:

[0039] Get the working status of the inverter;

[0040] When the working state of the inverter is a power generation limiting state, the power generation power of the photovoltaic module is released.

[0041] In an exemplary embodiment, when it is determined that the target power is in a power consumption state, at least one of the third adjustment mechanism, the second adjustment mechanism and the first adjustment mechanism is executed in the order of:

[0042] In the case where it is determined that the target power is in a power consumption state, executing the third forward regulation mechanism;

[0043] When the power generation power of the photovoltaic module is released and it is determined that the target power is still in a power consumption state, executing the second forward regulation mechanism;

[0044] When the load operating power reaches the power lower limit threshold and it is determined that the target power is still in a power consumption state, the first forward regulation mechanism is executed.

[0045] In an exemplary embodiment, a photovoltaic power generation system includes a monitoring module, and a distribution module, an energy storage module, a load module and a photovoltaic module connected to the monitoring module, wherein the energy storage module, the load module and the photovoltaic module are all connected to a local AC bus, the distribution module is arranged between the local AC bus and a public power grid, and the monitoring module is used to implement reverse power control of the photovoltaic power generation system according to the above method.

[0046] The above-mentioned reverse power control method and photovoltaic power generation system continuously obtain the target power of the photovoltaic grid-connected point. When it is determined that the target power is not in a balanced state, at least one mechanism is executed in the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism to adjust the working states of the energy storage module, the load module and the photovoltaic module respectively, so as to ensure that the output power of the photovoltaic module is dynamically matched with the operating power of the load module, and realize the source-load-storage three-party linkage control based on the energy information network to prevent the occurrence of reverse power, which not only meets the "full self-generation and self-use" grid-connected mode, but also greatly improves the utilization rate of photovoltaic power generation. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 A schematic diagram of a system block diagram of a photovoltaic power generation system in one embodiment;

[0049] Figure 2 is a schematic flow chart of a reverse power control method in one embodiment;

[0050] Figure 3 is a schematic flow chart of a reverse power control method in another embodiment;

[0051] Figure 4 is a schematic flow chart of a first reverse regulation mechanism in one embodiment;

[0052] Figure 5is a schematic diagram of a flow chart of a second reverse regulation mechanism in one embodiment;

[0053] Figure 6 A schematic diagram of a flow chart of adjustment steps in a reverse power state in an embodiment;

[0054] Figure 7 is a schematic flow chart of a first positive regulation mechanism in one embodiment;

[0055] Figure 8 is a schematic flow chart of a second positive regulation mechanism in one embodiment;

[0056] Fig. 9 is a schematic flow chart of a third positive regulation mechanism in one embodiment;

[0057] Fig.10 A schematic diagram of a flow chart of adjustment steps in a power consumption state in an embodiment;

[0058] Fig.11 A schematic diagram of a power topology of a photovoltaic power generation system in one embodiment;

[0059] Fig.12 FIG. 4 is a control logic flow chart of a photovoltaic power generation system in one embodiment. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0061] The reverse power control method provided in the embodiment of the present application can be applied to Figure 1 In the photovoltaic power generation system shown. Among them, the photovoltaic power generation system includes a monitoring module 110, and a distribution module 120, a storage module 130, a load module 140 and a photovoltaic module 150 connected to the monitoring module 110. The storage module 130, the load module 140 and the photovoltaic module 150 are all connected to the local AC bus, and the distribution module 120 is arranged between the local AC bus and the public power grid. The monitoring module 110 is used to realize reverse power control of the photovoltaic power generation system according to the reverse power control method provided in the embodiment of the present application. The data storage system can store data that the monitoring module 110 needs to process. The data storage system can be integrated on the monitoring module 110, or it can be placed on the cloud or other network servers.

[0062] Specifically, the monitoring module 110 continuously obtains the target power of the photovoltaic grid-connected point through the distribution module 120. When it is determined that the target power is not in a balanced state, at least one mechanism is executed among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism to dynamically match the output power of the photovoltaic module 150 with the operating power of the load module 140; wherein the first adjustment mechanism is used to adjust the working state of the energy storage module 130, the second adjustment mechanism is used to adjust the working state of the load module 140, and the third adjustment mechanism is used to control the working state of the photovoltaic module 150.

[0063] It can be understood that the monitoring module 110 can be a control chip or control device set in the photovoltaic power generation system, or an external control system based on wireless communication. The external control system can be implemented through devices such as terminals or servers. The terminals can be, but are not limited to, various personal computers, laptops, smart phones, tablet computers, Internet of Things devices and portable wearable devices. The Internet of Things devices can be smart speakers, smart TVs, smart air conditioners, smart car devices, projection devices, etc. Portable wearable devices can be smart watches, smart bracelets, head-mounted devices, etc. The head-mounted devices can be virtual reality (VR) devices, augmented reality (AR) devices, smart glasses, etc. The server can be an independent physical server, a server cluster or distributed system composed of multiple physical servers, or a cloud server that provides cloud computing services.

[0064] In an exemplary embodiment, Figure 2 As shown, a reverse power control method is provided, which is applied to a photovoltaic power generation system including an energy storage module, a load module and a photovoltaic module. Figure 1 The monitoring module 110 in FIG. 1 is taken as an example to illustrate, including the following steps 202 to 206. Among them:

[0065] Step 202, continuously obtaining the target power of the photovoltaic grid-connected point.

[0066] The photovoltaic grid connection point is the location where the power distribution module is set, that is, the intersection of the local AC bus and the public power grid, which is crucial to the photovoltaic power generation system. Since the photovoltaic grid connection point is the entrance for electric energy to flow from the photovoltaic power generation system to the public power grid, it can be used to transmit the generated electric energy to the power grid for use by other users or equipment. At the same time, the photovoltaic grid connection point in the photovoltaic power generation system is usually equipped with protection devices and control equipment (such as the power distribution module described in this application) to monitor and protect the safe operation of the power grid and the photovoltaic system.

[0067] It can be understood that the "full self-generation for own use" grid-connected mode targeted by this application is suitable for situations where the power load on the load side is large and continuous. In this mode, the electricity generated by the photovoltaic power generation system is mainly for the users themselves. For the above-mentioned similar irreversible grid-connected modes, the State Grid stipulates that it is necessary to install an anti-backflow device to prevent electricity from being sent back from the photovoltaic power generation system to the public power grid, that is, the reverse power phenomenon. At the same time, for the "full self-generation for own use" grid-connected mode, in order to make full use of photovoltaic energy, the optimal state is to dynamically match the output power of the photovoltaic module with the operating power of the load module. In this state, the energy utilization rate of photovoltaic power generation reaches the highest.

[0068] Specifically, the target power is the power detected in real time at the photovoltaic grid-connected point. It can be understood that if reverse power occurs, that is, electricity is sent back from the photovoltaic power generation system to the public power grid, the direction of the target power at the photovoltaic grid-connected point will be characterized as flowing from the local AC bus to the public power grid. If the output power of the photovoltaic module cannot meet the operating power of the load module, power consumption will occur at the photovoltaic grid-connected point, that is, electricity is transmitted from the public power grid to the photovoltaic power generation system, and the direction of the target power at the photovoltaic grid-connected point will be characterized as flowing from the public power grid to the local AC bus. Based on the direction and size of the target power, it can be judged whether the target power is in a balanced state, and then it can be judged whether the electric energy of the photovoltaic power generation system is in a balanced state.

[0069] Furthermore, it can be detected by the distribution module set at the photovoltaic grid-connected point. After being connected to the distribution module, the monitoring module continuously obtains the target power of the photovoltaic grid-connected point to continuously monitor whether reverse power occurs and whether the output power of the photovoltaic module is dynamically matched with the operating power of the load module.

[0070] Exemplarily, the method of continuously acquiring the target power of the photovoltaic grid-connected point may be to continuously acquire the target power of the photovoltaic grid-connected point at fixed time intervals.

[0071] Step 204: When it is determined that the target power is not in a balanced state, at least one mechanism among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism is executed to dynamically match the output power of the photovoltaic module with the operating power of the load module. The first adjustment mechanism is used to adjust the working state of the energy storage module, the second adjustment mechanism is used to adjust the working state of the load module, and the third adjustment mechanism is used to control the working state of the photovoltaic module.

[0072] Specifically, the target power is not in a balanced state, which indicates that there is power flow at the photovoltaic grid connection point. It may be a reverse power phenomenon in which power is sent back from the photovoltaic power generation system to the public power grid, or it may be a power consumption phenomenon in which power is transmitted from the public power grid to the photovoltaic power generation system. Therefore, it is necessary to regulate the working state of each module of the photovoltaic power generation system so that the output power of the photovoltaic module dynamically matches the operating power of the load module, so that there will be no excess power output to the public power grid, and there is no need for the public power grid to provide power support.

[0073] Furthermore, when it is determined that the target power is not in a balanced state, corresponding control measures need to be taken to dynamically match the output power of the photovoltaic module with the operating power of the load module.

[0074] However, the inventors have found that the current control of reverse power phenomenon is to directly cut off the grid circuit breaker or photovoltaic power generation system when the anti-backflow device detects reverse power at the photovoltaic grid connection point. This is a rigid cutoff, which has a large power impact on the equipment and is easy to cause damage, and will lead to low energy utilization efficiency of photovoltaics. The inventors further found that the target power of the photovoltaic grid connection point can be fed back to the photovoltaic inverter, and the power generation power of the photovoltaic module can be dynamically adjusted accordingly, while avoiding the occurrence of reverse power and power consumption. However, it is difficult to achieve good linkage for a photovoltaic power generation system that includes multiple photovoltaic modules, and it is easy to distribute the power limit indicators unevenly.

[0075] Based on this, the inventors of the present application considered adjusting the working state of the energy storage module (storage side) through a first adjustment mechanism, adjusting the working state of the load module (load side) through a second adjustment mechanism, and controlling the working state of the photovoltaic module (source side) through a third adjustment mechanism, and performing regulation in three dimensions of source-load-storage to improve the situation where the target power is not in a balanced state.

[0076] Among them, the first adjustment mechanism can be a photovoltaic energy storage mechanism, which is used to adjust the working state of the energy storage module. Specifically, in the case of reverse power phenomenon, the energy storage module can be adjusted to store energy and store excess photovoltaic energy. It can also be adjusted not to store energy or even start discharging in the case of power consumption to meet the larger power demand of the load module.

[0077] The second adjustment mechanism may be a load flexible matching mechanism, which is used to adjust the working state of the load module. In the case of reverse power phenomenon, the load operating power of the load module may be flexibly increased to absorb more photovoltaic energy generated by the photovoltaic module. In the case of power consumption phenomenon, the load operating power of the load module may be flexibly decreased to absorb less photovoltaic energy.

[0078] The third adjustment mechanism may be a photovoltaic power limiting mechanism, which is used to adjust the working state of the photovoltaic module. It may be to limit the power generation of the photovoltaic module in the event of reverse power phenomenon to reduce the photovoltaic energy generated by the photovoltaic module. It may also be to release the power generation of the photovoltaic module in the event of power consumption phenomenon to increase the photovoltaic energy generated by the photovoltaic module to meet the larger power demand of the load module.

[0079] It can be understood that, when it is determined that the target power is not in a balanced state, any one of the above three adjustment mechanisms can be selected to dynamically match the output power of the photovoltaic module with the operating power of the load module. After executing any of the above adjustment mechanisms, when the target power is not in a balanced state, another adjustment mechanism can be continuously selected until the output power of the photovoltaic module is dynamically matched with the operating power of the load module.

[0080] The above-mentioned reverse power control method continuously obtains the target power of the photovoltaic grid-connected point. When it is determined that the target power is not in a balanced state, at least one mechanism is executed in the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism to adjust the working states of the energy storage module, the load module and the photovoltaic module respectively, so as to ensure that the output power of the photovoltaic module is dynamically matched with the operating power of the load module, and realizes the source-load-storage three-party linkage control based on the energy information network to prevent the occurrence of reverse power, which not only meets the "full self-generation and self-use" grid-connected mode, but also greatly improves the utilization rate of photovoltaic power generation.

[0081] In an exemplary embodiment, step 204 includes: when it is determined that the target power is not in a balanced state, executing at least one mechanism among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism in a preset order.

[0082] Specifically, in order to maximize the use of photovoltaic energy, among the first regulation mechanism, the second regulation mechanism and the third regulation mechanism, at least one mechanism may be executed in a preset order. The preset order may be determined according to the state of the target power. For example, in the case of reverse power phenomenon, the preset order may be the first regulation mechanism, the second regulation mechanism and the third regulation mechanism; in the case of power consumption phenomenon, the preset order may be the third regulation mechanism, the second regulation mechanism and the first regulation mechanism.

[0083] Further, after determining the preset order of the above mechanisms, the first order mechanism may be executed first according to the preset order. If the target power is still not in a balanced state after the first order mechanism is executed, the second order mechanism may be further executed. If the target power is still not in a balanced state after the second order mechanism is executed, the third order mechanism may be further executed last. Taking the case of reverse power phenomenon as an example, the first adjustment mechanism may be executed first. If the target power is still not in a balanced state after the first adjustment mechanism is executed, the second adjustment mechanism may be further executed. If the target power is still not in a balanced state after the second adjustment mechanism is executed, the third adjustment mechanism may be further executed last.

[0084] In an exemplary embodiment, Figure 3 As shown, when it is determined that the target power is not in a balanced state, at least one mechanism is executed in a preset order among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism, including the following steps 302 to 304, wherein:

[0085] Step 302: When it is determined that the target power is in a reverse power state, at least one of the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism is executed in the order of the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism.

[0086] Specifically, in the event of reverse power, the first adjustment mechanism may be executed first to adjust the working state of the energy storage module, so that the excess photovoltaic energy can be stored first, and when needed, the energy storage module can be discharged to utilize this part of the photovoltaic energy. Then the second adjustment mechanism may be executed to adjust the working state of the load module, so that the excess photovoltaic energy can be utilized through the load module. Finally, the third adjustment mechanism that will lose photovoltaic energy is considered to be executed to adjust the working state of the photovoltaic module and limit the power generation power of the photovoltaic module.

[0087] It is understandable that when the target power is in different states, the adjustment mechanism executed on each module may be different. Taking the adjustment of the working state of the photovoltaic module as an example, in the case of reverse power phenomenon, the third adjustment mechanism needs to make the photovoltaic module emit less photovoltaic energy, and in the case of power consumption phenomenon, the third adjustment mechanism needs to make the photovoltaic module emit more photovoltaic energy.

[0088] In an exemplary embodiment, the first regulation mechanism includes a first reverse regulation mechanism. Figure 4 As shown, executing the first reverse regulation mechanism includes the following steps 402 to 404, wherein:

[0089] Step 402, obtaining the stored energy of the energy storage module.

[0090] Step 404: When the stored energy does not reach the upper energy threshold, the working mode of the energy storage module is set to the energy storage mode.

[0091] Specifically, the first reverse regulation mechanism is a regulation mechanism for regulating the energy storage module to store more photovoltaic energy. The stored energy of the energy storage module is the photovoltaic energy value currently stored in the storage module, which can be collected by the monitoring module communicating with the energy storage module. The energy upper limit threshold is the maximum photovoltaic energy value that can be stored in the energy storage module, which can also be understood as the maximum storage capacity of the energy storage module.

[0092] Furthermore, when the stored energy does not reach the energy upper limit threshold, it indicates that the energy storage module can store more photovoltaic energy, and the working mode of the energy storage module can be set to the energy storage mode to store the excess photovoltaic energy.

[0093] In an exemplary embodiment, the second regulation mechanism includes a second reverse regulation mechanism. Figure 5 As shown, executing the second reverse regulation mechanism includes the following steps 502 to 504, wherein:

[0094] Step 502: Obtain the load operating power of the load module.

[0095] Step 504: when the load operating power does not reach the upper power limit threshold, increase the load operating power of the load module.

[0096] Specifically, the second reverse regulation mechanism is a regulation mechanism for regulating the load module to absorb more photovoltaic energy. The load operating power of the load module represents the photovoltaic energy value absorbed by the load module in real time, which can be collected by the monitoring module communicating with the load module. The power upper limit threshold is the maximum photovoltaic energy value that the load module can absorb.

[0097] Furthermore, when the load operating power does not reach the upper power limit threshold, it indicates that the load module can still absorb more photovoltaic energy, and the load operating power of the load module can be increased to absorb more photovoltaic energy.

[0098] Exemplarily, the load operating power of the load module in the above steps can be adjusted upward by flexibly adjusting the load operating power of the load module. The flexible adjustment can refer to increasing the load operating power of the load module by adjusting the setting parameters of the load without affecting the normal use of the user, so that it can absorb more photovoltaic energy. Taking the load module as an air-conditioning device as an example, the load operating power can be reduced by raising the set temperature, reducing the fan speed, etc., but conversely, when the load operating power needs to be increased, the load operating power can also be adjusted upward by adjusting these parameters, thereby achieving flexible adjustment.

[0099] In an exemplary embodiment, the third regulation mechanism includes a third reverse regulation mechanism. Exemplarily, executing the third reverse regulation mechanism includes: limiting the power generation of the photovoltaic module.

[0100] Specifically, the third reverse regulation mechanism is a regulation mechanism that can make the photovoltaic module emit less photovoltaic energy. When the target power is in the reverse power state, it indicates that the photovoltaic energy emitted by the photovoltaic module is too much and cannot be completely absorbed by the load module, and the power generation power of the photovoltaic module can be limited to emit less photovoltaic energy.

[0101] Exemplarily, the photovoltaic module includes a photovoltaic component and an inverter. The photovoltaic component inverts the generated DC photovoltaic energy into AC through the inverter, and then connects it to the local AC bus, and transmits it to the energy storage module and the load module through the local AC bus.

[0102] Furthermore, the power generation power of the photovoltaic module may be limited by adjusting the working state of the inverter so that the inverter converts less DC photovoltaic energy into AC.

[0103] In an exemplary embodiment, Figure 6 As shown, step 302 includes the following steps 602 to 606, wherein:

[0104] Step 602: When it is determined that the target power is in a reverse power state, a first reverse regulation mechanism is executed.

[0105] Step 604: When the stored energy reaches the energy upper limit threshold and it is determined that the target power is still in the reverse power state, execute the second reverse regulation mechanism.

[0106] Step 606: When the load operating power reaches the upper power threshold and it is determined that the target power is still in the reverse power state, execute the third reverse regulation mechanism.

[0107] Specifically, when it is determined that the target power is in a reverse power state, the stored energy of the energy storage module can be first obtained, and it can be determined whether the stored energy reaches the energy upper limit threshold. If the stored energy does not reach the energy upper limit threshold, the working mode of the energy storage module is set to the energy storage mode to store more photovoltaic energy. Further, when the stored energy reaches the energy upper limit threshold and it is determined that the target power is still in a reverse power state, it indicates that the first reverse regulation mechanism has not changed the reverse power phenomenon, then the load operating power of the load module can be obtained, and it can be determined whether the load operating power reaches the power upper limit threshold. If the load operating power does not reach the power upper limit threshold, the load operating power of the load module can be increased to absorb more photovoltaic energy. Further, when the load operating power reaches the power upper limit threshold and it is determined that the target power is still in a reverse power state, it indicates that the second reverse regulation mechanism has not changed the reverse power phenomenon, then the power generation power of the photovoltaic module can be directly limited, so that the photovoltaic module emits less photovoltaic energy and eliminates the reverse power phenomenon at the photovoltaic grid connection point.

[0108] Exemplarily, in the above embodiment, if the photovoltaic power generation system includes multiple energy storage modules, the stored energy and energy upper limit threshold of the above energy storage modules are the stored energy and energy upper limit threshold of all energy storage modules combined. Similarly, if the photovoltaic power generation system includes multiple load modules, the load operating power and power upper limit threshold of the above load modules are the load operating power and power upper limit threshold of all load modules combined. If the photovoltaic power generation system includes multiple photovoltaic modules, the power generation power of the photovoltaic module can also be the power generation power of all photovoltaic modules combined.

[0109] Step 304: when it is determined that the target power is in a power consumption state, at least one of the third adjustment mechanism, the second adjustment mechanism and the first adjustment mechanism is executed in the order of the third adjustment mechanism.

[0110] Specifically, in the event of power consumption, the third adjustment mechanism may be first executed to adjust the working state of the photovoltaic module, release the power generation power of the photovoltaic module, and obtain more available photovoltaic energy. Then, the second adjustment mechanism may be considered to be executed to adjust the working state of the load module, and eliminate the power consumption phenomenon by reducing the operating power of the load module. Finally, the first adjustment mechanism may be considered to be executed to adjust the working state of the energy storage module to limit the consumption of the stored photovoltaic energy, and to realize the utilization of this part of the photovoltaic energy by generating electricity using the photovoltaic energy stored thereon.

[0111] In an exemplary embodiment, the first regulation mechanism includes a first positive regulation mechanism. Figure 7 As shown, the first positive regulation mechanism is executed, including the following steps 702 to 706, wherein:

[0112] Step 702, obtaining the working mode and stored energy of the energy storage module.

[0113] Step 704: If the working mode of the energy storage module is not the energy storage mode and the stored energy does not reach the energy lower limit threshold, the working mode of the energy storage module is set to the discharge mode.

[0114] Step 706: If not, control the energy storage module to stop running.

[0115] Specifically, the first positive regulation mechanism is a regulation mechanism for regulating the energy storage module to store less photovoltaic energy. Among them, the stored energy of the energy storage module is the photovoltaic energy value currently stored in the storage module, and the working mode characterizes whether the energy storage module can currently store photovoltaic energy, release photovoltaic energy, or neither store nor release. The above parameters can be collected by the monitoring module communicating with the energy storage module. The lower energy threshold is the minimum photovoltaic energy value that the energy storage module can store, which can also be understood as the minimum storage capacity of the energy storage module.

[0116] Furthermore, when the working mode of the energy storage module is not the energy storage mode, and the stored energy has not reached the energy lower limit threshold, it indicates that the energy storage module is still storing photovoltaic energy and / or still storing photovoltaic energy that can be consumed. Then, the working mode of the energy storage module can be set to the discharge mode to release the photovoltaic energy that can be consumed stored therein.

[0117] In an exemplary embodiment, the second regulation mechanism includes a second positive regulation mechanism. Figure 8 As shown, the second positive regulation mechanism is executed, including the following steps 802 to 804, wherein:

[0118] Step 802, obtaining the load operating power of the load module.

[0119] Step 804: When the load operating power does not reach the power lower limit threshold, the load operating power of the load module is lowered.

[0120] Specifically, the second positive regulation mechanism is a regulation mechanism for regulating the load module to absorb less photovoltaic energy. The load operating power of the load module represents the photovoltaic energy value absorbed by the load module in real time, which can be collected by the monitoring module communicating with the load module. The power lower limit threshold is the minimum photovoltaic energy value that the load module can absorb.

[0121] Furthermore, when the load operating power does not reach the power lower limit threshold, it indicates that the load module can still absorb less photovoltaic energy, and the load operating power of the load module can be reduced to make it absorb less photovoltaic energy. Similar to the step of increasing the load operating power of the load module in step 504, reducing the load operating power of the load module can also be a flexible reduction of the load operating power of the load module.

[0122] In an exemplary embodiment, the third regulation mechanism includes a third positive regulation mechanism. Fig. 9 As shown, the third positive regulation mechanism is executed, including the following steps 902 to 904, wherein:

[0123] Step 902, obtaining the working status of the inverter.

[0124] Step 904: when the working state of the inverter is the power generation limited state, release the power generation power of the photovoltaic module.

[0125] Specifically, the third positive regulation mechanism is a regulation mechanism that can make the photovoltaic module emit more photovoltaic energy. Then, when the target power is in a power consumption state, it indicates that the photovoltaic energy emitted by the photovoltaic module is too little to meet the power consumption demand of the load module, and then the power generation power of the photovoltaic module can be released to make it emit more photovoltaic energy.

[0126] It can be understood that when the power generation of the photovoltaic module is limited, the working state of the inverter will be adjusted to the limited power generation state so that the inverter can invert less DC photovoltaic energy into AC. Then, when the target power is in the power consumption state, the limited power generation state of the inverter can be cancelled to release the power generation of the photovoltaic module so that the inverter can normally invert all the DC photovoltaic energy generated by the photovoltaic module into AC, thereby achieving the purpose of generating more photovoltaic energy.

[0127] In an exemplary embodiment, Fig.10 As shown, step 304 includes the following steps 102 to 106, wherein:

[0128] Step 102: When it is determined that the target power is in a power consumption state, a third forward regulation mechanism is executed.

[0129] Step 104 : When the power generation power of the photovoltaic module is released and it is determined that the target power is still in a power consumption state, a second forward regulation mechanism is executed.

[0130] Step 106: When the load operating power reaches the power lower limit threshold and it is determined that the target power is still in a power consumption state, execute a first forward regulation mechanism.

[0131] Specifically, when it is determined that the target power is in a power consumption state, the working state of the inverter can be first obtained to determine whether the working state of the inverter is a power generation restriction state. If the working state of the inverter is a power generation restriction state, the power generation restriction is canceled to release the power generation power of the photovoltaic module. When the power generation power of the photovoltaic module is released and it is determined that the target power is still in a power consumption state, it indicates that the third forward regulation mechanism has not changed the power consumption phenomenon, and then the load operating power of the load module is further obtained, and it is determined whether the load operating power reaches the power lower limit threshold. If the load operating power does not reach the power lower limit threshold, the load operating power of the load module is lowered to absorb less photovoltaic energy. When the load operating power reaches the power lower limit threshold and it is determined that the target power is still in a power consumption state, it indicates that the second forward regulation mechanism has not changed the power consumption phenomenon, and then the working mode and stored energy of the energy storage module are further obtained, and it is determined whether the working mode of the energy storage module is the energy storage mode, and whether the stored energy reaches the energy lower limit threshold. If the working mode of the energy storage module is not the energy storage mode and the stored energy has not reached the energy lower limit threshold, the working mode of the energy storage module is set to the discharge mode to release the photovoltaic energy stored thereon and eliminate the reverse power phenomenon at the photovoltaic grid-connected location.

[0132] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0133] In an exemplary embodiment, Figure 1 As shown, a photovoltaic power generation system is provided, including a monitoring module 110, and a distribution module 120, an energy storage module 130, a load module 140 and a photovoltaic module 150 connected to the monitoring module 110, the energy storage module 130, the load module 140 and the photovoltaic module 150 are all connected to the local AC bus, the distribution module 120 is arranged between the local AC bus and the public power grid, and the monitoring module 110 is used to realize reverse power control of the photovoltaic power generation system according to the reverse power control method provided in the embodiment of the present application.

[0134] The implementation solution provided by the photovoltaic power generation system to solve the problem is similar to the implementation solution recorded in the above-mentioned reverse power control method. Therefore, the specific limitations in one or more photovoltaic power generation system embodiments provided in this application can be referred to the limitations on the reverse power control method above, and will not be repeated here.

[0135] In a specific embodiment, Fig.11 As shown, a photovoltaic power generation system is provided, and the equipment on it can be classified according to the nature of work. The source side equipment includes: photovoltaic module 1, photovoltaic module 2, inverter 1, inverter 2; the storage side equipment includes: energy storage device 1, energy storage device 2; the grid side equipment includes: power distribution device; the load side equipment includes: local load 1, local load 2. The information side equipment includes: energy information monitoring platform.

[0136] Specifically, the photovoltaic module converts photovoltaic DC into AC through the inverter and then connects it to the local AC bus. The energy storage device and local load are directly connected to the local AC bus. The distribution device is installed between the local bus and the public power grid, mainly to achieve voltage level conversion and power information monitoring. The energy information monitoring platform forms a communication network with the inverter, local load, energy storage device and distribution device to obtain energy information of each device.

[0137] The operation mode of the photovoltaic power generation system provided in this embodiment is as follows Fig.12 shown.

[0138] Specifically, after the photovoltaic power generation system starts to operate, the power situation of the photovoltaic grid connection point is continuously observed. If reverse power occurs at the photovoltaic grid connection point (i.e., the distribution device), the energy information monitoring platform first inquires whether the storage capacity of the energy storage device has reached the upper limit value. If it has not reached the upper limit value, the first control mechanism - photovoltaic energy storage is activated to control the energy storage device to enter the energy storage mode and store the excess photovoltaic energy.

[0139] When the storage capacity reaches the upper limit and reverse power still occurs at the photovoltaic grid-connected point, the energy information monitoring platform asks whether the operating power of the local load has reached the upper limit of the adjustable range. If it has not reached the upper limit, the second control mechanism - load flexible matching - is activated to flexibly increase the operating power of the local load and dynamically balance the electrical energy output by photovoltaic power generation.

[0140] When the adjustable operating power of the local load has reached the upper limit and the photovoltaic grid connection point still has reverse power, the energy information monitoring platform will start the third control mechanism - photovoltaic power limitation. By limiting the photovoltaic power generation, the reverse power at the grid connection point is eliminated.

[0141] When there is no reverse power situation at the photovoltaic grid-connected point, the energy information monitoring platform determines whether the current grid-connected point power is greater than the power consumption threshold. If the power consumption threshold is not reached, the power of the entire energy system is in a relatively balanced state and no regulation is performed. Otherwise, the energy information monitoring platform begins to enter the regulation mechanism.

[0142] When the power of the photovoltaic grid-connected point is greater than the power consumption threshold, the energy information monitoring platform first determines whether the inverter is in a state of limiting photovoltaic power generation. If so, the inverter gradually releases the photovoltaic power generation capacity.

[0143] When the inverter has released the photovoltaic power generation capacity, the photovoltaic module is working at the maximum power point, and the grid-connected power is still greater than the power consumption threshold, the energy information monitoring platform begins to flexibly adjust the local load to reduce its operating power.

[0144] When the operating power of the local load has been flexibly adjusted down to the lower limit and the grid-connected point power is still greater than the power consumption threshold, the energy information monitoring platform first determines whether the energy storage device is in energy storage mode. If so, it stops running. If not, it further determines whether the current capacity of the energy storage device has reached the lower limit. If not, the energy storage device starts discharging. If so, the energy storage device stops running.

[0145] In this embodiment, the energy information flow provided by the energy Internet can accurately obtain the power direction and size of each node on the power network, and can be regulated in the three dimensions of source-load-storage. The photovoltaic power limit, photovoltaic energy storage, and load flexible matching triple regulation mechanism are used to prevent the occurrence of reverse power at the photovoltaic grid-connected access point, which not only meets the "full self-generation and self-use" grid-connected mode, but also greatly improves the utilization rate of photovoltaic power generation.

[0146] Based on the same inventive concept, the embodiment of the present application also provides a reverse power control device for implementing the reverse power control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more reverse power control device embodiments provided below can refer to the limitations on the reverse power control method above, and will not be repeated here.

[0147] In an exemplary embodiment, a reverse power control device is provided, which is applied to a photovoltaic power generation system including an energy storage module, a load module and a photovoltaic module, and includes: an acquisition module and an execution module, wherein:

[0148] An acquisition module is used to continuously acquire the target power of the photovoltaic grid-connected point;

[0149] An execution module is used to execute at least one mechanism among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism when it is determined that the target power is not in a balanced state, so as to dynamically match the output power of the photovoltaic module with the operating power of the load module; the first adjustment mechanism is used to adjust the working state of the energy storage module, the second adjustment mechanism is used to adjust the working state of the load module, and the third adjustment mechanism is used to control the working state of the photovoltaic module.

[0150] In an exemplary embodiment, the execution module is further configured to execute at least one mechanism among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism in a preset order when it is determined that the target power is not in a balanced state.

[0151] In an exemplary embodiment, the execution module is also used to execute at least one of the first regulation mechanism, the second regulation mechanism and the third regulation mechanism in the order when it is determined that the target power is in a reverse power state; and to execute at least one of the third regulation mechanism, the second regulation mechanism and the first regulation mechanism in the order when it is determined that the target power is in a power consumption state.

[0152] In an exemplary embodiment, the first regulation mechanism includes a first reverse regulation mechanism;

[0153] The execution module is also used to obtain the stored energy of the energy storage module; when the stored energy does not reach the energy upper limit threshold, the working mode of the energy storage module is set to the energy storage mode.

[0154] In an exemplary embodiment, the second regulation mechanism includes a second reverse regulation mechanism;

[0155] The execution module is also used to obtain the load operating power of the load module; when the load operating power does not reach the power upper limit threshold, the load operating power of the load module is increased.

[0156] In an exemplary embodiment, the third regulation mechanism includes a third reverse regulation mechanism;

[0157] The execution module is also used to limit the power generation of the photovoltaic module.

[0158] In an exemplary embodiment, the execution module is also used to execute a first reverse regulation mechanism when it is determined that the target power is in a reverse power state; execute a second reverse regulation mechanism when the stored energy reaches an energy upper limit threshold and it is determined that the target power is still in a reverse power state; and execute a third reverse regulation mechanism when the load operating power reaches a power upper limit threshold and it is determined that the target power is still in a reverse power state.

[0159] In an exemplary embodiment, the first regulation mechanism includes a first positive regulation mechanism;

[0160] The execution module is also used to obtain the working mode and stored energy of the energy storage module; if the working mode of the energy storage module is not the energy storage mode and the stored energy has not reached the energy lower limit threshold, the working mode of the energy storage module is set to the discharge mode; if not, the energy storage module is controlled to stop running.

[0161] In an exemplary embodiment, the second regulation mechanism includes a second positive regulation mechanism;

[0162] The execution module is also used to obtain the load operating power of the load module; when the load operating power does not reach the power lower limit threshold, the load operating power of the load module is lowered.

[0163] In an exemplary embodiment, the third regulation mechanism includes a third positive regulation mechanism;

[0164] The execution module is also used to obtain the working state of the inverter; when the working state of the inverter is a limited power generation state, the power generation power of the photovoltaic module is released.

[0165] In an exemplary embodiment, the execution module is also used to execute the third forward regulation mechanism when it is determined that the target power is in a power consumption state; execute the second forward regulation mechanism when the power generation power of the photovoltaic module is released and it is determined that the target power is still in a power consumption state; and execute the first forward regulation mechanism when the load operating power reaches the power lower limit threshold and it is determined that the target power is still in a power consumption state.

[0166] Each module in the above reverse power control device can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0167] In an exemplary embodiment, a computer device is provided, which may be a terminal. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. The processor, the memory, and the input / output interface are connected via a system bus, and the communication interface, the display unit, and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a reverse power control method is implemented. The display unit of the computer device is used to form a visually visible picture, which may be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0168] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0169] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0170] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0171] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0172] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0173] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A reverse power control method, applied to a photovoltaic power generation system including an energy storage module, a load module and a photovoltaic module, characterized in that: The method comprises: Continuously obtain the target power of the photovoltaic grid-connected point; When it is determined that the target power is not in a balanced state, at least one mechanism among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism is executed to dynamically match the output power of the photovoltaic module with the operating power of the load module; The first regulating mechanism is used to regulate the working state of the energy storage module, the second regulating mechanism is used to regulate the working state of the load module, and the third regulating mechanism is used to control the working state of the photovoltaic module.

2. The method according to claim 1, characterized in that When it is determined that the target power is not in a balanced state, at least one mechanism is executed among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism, including: When it is determined that the target power is not in a balanced state, at least one mechanism among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism is executed in a preset order.

3. The method according to claim 2, characterized in that When it is determined that the target power is not in a balanced state, at least one mechanism among the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism is executed in a preset order, including: When it is determined that the target power is in a reverse power state, at least one of the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism is executed in the order; When it is determined that the target power is in a power consumption state, at least one of the third adjustment mechanism, the second adjustment mechanism and the first adjustment mechanism is executed in this order.

4. The method according to claim 3, characterized in that The first regulation mechanism includes a first reverse regulation mechanism; Executing the first reverse regulation mechanism includes: Acquiring stored energy of the energy storage module; When the stored energy does not reach the energy upper limit threshold, the working mode of the energy storage module is set to the energy storage mode.

5. The method according to claim 4, characterized in that The second regulation mechanism includes a second reverse regulation mechanism; Executing the second reverse regulation mechanism includes: Obtaining the load operating power of the load module; When the load operating power does not reach the upper power limit threshold, the load operating power of the load module is increased.

6. The method according to claim 5, characterized in that The third regulation mechanism includes a third reverse regulation mechanism; Executing the third reverse regulation mechanism includes: limiting the power generation of the photovoltaic module.

7. The method according to claim 6, characterized in that When it is determined that the target power is in a reverse power state, at least one of the first adjustment mechanism, the second adjustment mechanism, and the third adjustment mechanism is executed in the order of: In the case of determining that the target power is in a reverse power state, executing the first reverse regulation mechanism; When the stored energy reaches the energy upper limit threshold and it is determined that the target power is still in the reverse power state, executing the second reverse regulation mechanism; When the load operating power reaches the upper power threshold and it is determined that the target power is still in the reverse power state, the third reverse regulation mechanism is executed.

8. The method according to claim 3, characterized in that The first regulatory mechanism includes a first positive regulatory mechanism; Executing the first positive regulation mechanism includes: Obtaining the working mode and stored energy of the energy storage module; If the working mode of the energy storage module is not the energy storage mode, and the stored energy does not reach the energy lower limit threshold, setting the working mode of the energy storage module to the discharge mode; If not, the energy storage module is controlled to stop running.

9. The method according to claim 8, characterized in that The second regulatory mechanism includes a second positive regulatory mechanism; Executing the second positive regulation mechanism includes: Obtaining the load operating power of the load module; When the load operating power does not reach the power lower limit threshold, the load operating power of the load module is lowered.

10. The method according to claim 9, characterized in that The third regulation mechanism includes a third positive regulation mechanism; Executing the third positive regulation mechanism includes: Get the working status of the inverter; When the working state of the inverter is a power generation limiting state, the power generation power of the photovoltaic module is released.

11. The method according to claim 10, characterized in that When it is determined that the target power is in a power consumption state, at least one of the third adjustment mechanism, the second adjustment mechanism and the first adjustment mechanism is executed in the order of: In the case where it is determined that the target power is in a power consumption state, executing the third forward regulation mechanism; When the power generation power of the photovoltaic module is released and it is determined that the target power is still in a power consumption state, executing the second forward regulation mechanism; When the load operating power reaches the power lower limit threshold and it is determined that the target power is still in a power consumption state, the first forward regulation mechanism is executed.

12. A photovoltaic power generation system, characterized in that: It includes a monitoring module, and a distribution module, an energy storage module, a load module and a photovoltaic module connected to the monitoring module, the energy storage module, the load module and the photovoltaic module are all connected to a local AC bus, the distribution module is arranged between the local AC bus and a public power grid, and the monitoring module is used to realize reverse power control of a photovoltaic power generation system according to a method described in any one of claims 1 to 11.

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