Reverse power control method and photovoltaic power generation system

Abstract

A reverse power control method and a photovoltaic power generation system. The reverse power control method comprises: continuously acquiring a target power at a photovoltaic grid connection point; and in response to determining that the target power is not in a balanced state, executing at least one mechanism among a first regulation mechanism, a second regulation mechanism and a third regulation mechanism, wherein the first regulation mechanism is used for regulating the operating state of an energy storage module, the second regulation mechanism is used for regulating the operating state of a load module, and the third regulation mechanism is used for controlling the operating state of a photovoltaic module.

Description

Inverse power control methods and photovoltaic power generation systems

[0001] Related applications

[0002] This application claims priority to Chinese patent application filed on December 19, 2024, with application number 202411882803.4 and entitled "Inverse Power Control Method and Photovoltaic Power Generation System", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of energy storage technology, and in particular to an inverse power control method and a photovoltaic power generation system. Background Technology

[0004] With the popularization of renewable energy and the development of the electricity market, photovoltaic power generation technology has been rapidly implemented both domestically and internationally. Currently, distributed photovoltaic power generation can be mainly connected to the grid in three ways: "full grid connection," "self-consumption with surplus power fed into the grid," and "full self-consumption." The first two modes are currently the relatively mainstream grid connection modes. However, as the exploitable capacity of the power grid has decreased in recent years, the problem of photovoltaic power consumption has become increasingly apparent. Therefore, the demand for the "full self-consumption" grid connection mode is gradually emerging. Summary of the Invention

[0005] This application provides an inverse power control method and a photovoltaic power generation system.

[0006] 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 includes: continuously acquiring the target power of the photovoltaic grid-connected point; corresponding to the determination that the target power is not in an unbalanced state, executing at least one of a first adjustment mechanism, a second adjustment mechanism, and a third adjustment mechanism 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 operating state of the energy storage module, the second adjustment mechanism is used to adjust the operating state of the load module, and the third adjustment mechanism is used to control the operating state of the photovoltaic module.

[0007] In an exemplary embodiment, the determination that the target power is not in an unbalanced state, in the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism, includes executing at least one mechanism in a preset order in the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism, in accordance with the determination that the target power is not in an unbalanced state.

[0008] In an exemplary embodiment, corresponding to the determination that the target power is not in an 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: corresponding to the determination that the target power is in an inverse 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 third adjustment mechanism.

[0009] In one exemplary embodiment, the first regulation mechanism includes a first reverse regulation mechanism. Executing the first reverse regulation mechanism includes: acquiring the stored energy of the energy storage module; and, if the stored energy has not reached the upper energy limit threshold, setting the operating mode of the energy storage module to energy storage mode.

[0010] In one exemplary embodiment, the second adjustment mechanism includes a second reverse adjustment mechanism. Executing the second reverse adjustment mechanism includes: acquiring the load operating power of the load module; and, if the load operating power does not reach the upper power limit threshold, increasing the load operating power of the load module.

[0011] In one exemplary embodiment, 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.

[0012] In an exemplary embodiment, the determination that the target power is in an inverse power state is performed by executing at least one of the following mechanisms in the order of a first adjustment mechanism, a second adjustment mechanism, and a third adjustment mechanism: executing the first inverse adjustment mechanism in response to the determination that the target power is in an inverse power state; executing the second inverse adjustment mechanism when the stored energy reaches the energy upper limit threshold and the target power is still in an inverse power state; and executing the third inverse adjustment mechanism when the load operating power reaches the power upper limit threshold and the target power is still in an inverse power state.

[0013] In an exemplary embodiment, corresponding to the determination that the target power is not in an unbalanced 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: corresponding to the determination that the target power is in a power-consuming state, executing at least one mechanism in the order of the third adjustment mechanism, the second adjustment mechanism, and the first adjustment mechanism.

[0014] In an exemplary embodiment, the first regulation mechanism includes a first positive regulation mechanism. Executing the first positive regulation mechanism includes: acquiring the operating mode and stored energy of the energy storage module; if the operating mode of the energy storage module is not energy storage mode and the stored energy has not reached the lower energy threshold, setting the operating mode of the energy storage module to discharge mode; otherwise, controlling the energy storage module to stop operating.

[0015] In one exemplary embodiment, the second adjustment mechanism includes a second positive adjustment mechanism. Executing the second positive adjustment mechanism includes: acquiring the load operating power of the load module; and, if the load operating power does not reach a lower power limit threshold, reducing the load operating power of the load module.

[0016] In one exemplary embodiment, the third regulation mechanism includes a third positive regulation mechanism. Executing the third positive regulation mechanism includes: acquiring the operating state of the inverter; and, if the inverter's operating state is a limited power generation state, releasing the power generation capacity of the photovoltaic module.

[0017] In an exemplary embodiment, corresponding to the determination that the target power is in a power-consuming state, at least one of the following is executed in the order of the third adjustment mechanism, the second adjustment mechanism, and the first adjustment mechanism: when it is determined that the target power is in a power-consuming state, the third positive adjustment mechanism is executed; when the power generation of the photovoltaic module has been released and it is determined that the target power is still in a power-consuming state, the second positive adjustment mechanism is executed; when the load operating power reaches the lower power limit threshold and it is determined that the target power is still in a power-consuming state, the first positive adjustment mechanism is executed.

[0018] In an exemplary embodiment, a photovoltaic power generation system includes a monitoring module, and a power 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 power distribution module is located between the local AC bus and the public power grid. The monitoring module is used to implement reverse power control of the photovoltaic power generation system according to the above method.

[0019] The aforementioned reverse power control method and photovoltaic power generation system continuously acquire the target power of the photovoltaic grid connection point. Corresponding to the determination that the target power is not in an unbalanced state, at least one of the first, second, and third adjustment mechanisms is executed to adjust the working state of the energy storage module, load module, and photovoltaic module respectively, so as to ensure that the output power of the photovoltaic module and the operating power of the load module are dynamically matched. Based on the energy information network, the source-load-storage three-party linkage regulation is realized to prevent the occurrence of reverse power. It not only meets the "full self-generation and self-consumption" grid connection mode, but also significantly improves the utilization rate of photovoltaic power generation. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or related technologies, the drawings used in the description of the embodiments of this application or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is a schematic diagram of a photovoltaic power generation system in one embodiment;

[0022] Figure 2 is a flowchart of the inverse power control method in one embodiment;

[0023] Figure 3 is a flowchart of the inverse power control method in another embodiment;

[0024] Figure 4 is a flowchart illustrating the first reverse regulation mechanism in one embodiment;

[0025] Figure 5 is a flowchart illustrating the second reverse regulation mechanism in one embodiment;

[0026] Figure 6 is a flowchart illustrating the adjustment steps under reverse power conditions in one embodiment;

[0027] Figure 7 is a flowchart illustrating the first positive regulation mechanism in one embodiment;

[0028] Figure 8 is a flowchart illustrating the second positive regulation mechanism in one embodiment;

[0029] Figure 9 is a flowchart illustrating the third positive regulation mechanism in one embodiment;

[0030] Figure 10 is a flowchart illustrating the adjustment steps under power consumption conditions in one embodiment;

[0031] Figure 11 is a schematic diagram of the power topology of a photovoltaic power generation system in one embodiment;

[0032] Figure 12 is a control logic flowchart of a photovoltaic power generation system in one embodiment. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0034] For the grid-connected mode of "full self-consumption", if the power generated by the photovoltaic power generation system exceeds the power used by the load, the voltage of the grid system and the photovoltaic power generation system will increase, which will affect the stability of the grid and the power supply quality. Long-term overvoltage operation will also cause damage to the photovoltaic power generation system equipment.

[0035] The reverse power control method provided in this application embodiment can be applied to the photovoltaic power generation system shown in Figure 1. The photovoltaic power generation system includes 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, load module 140, and photovoltaic module 150 are all connected to the local AC bus. The distribution module 120 is located between the local AC bus and the public power grid. The monitoring module 110 is used to implement reverse power control of the photovoltaic power generation system according to the reverse power control method provided in this application embodiment. A data storage system can store the data that the monitoring module 110 needs to process. The data storage system can be integrated into the monitoring module 110 or placed in the cloud or on other network servers.

[0036] Specifically, the monitoring module 110 continuously acquires the target power of the photovoltaic grid-connected point through the power distribution module 120. If it is determined that the target power is not in an unbalanced state, at least one mechanism among the first, second, and third adjustment mechanisms is executed to dynamically match the output power of the photovoltaic module 150 with the operating power of the load module 140. 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.

[0037] It is understood that the monitoring module 110 can be a control chip or control device installed within the photovoltaic power generation system, or it can be an external control system based on wireless communication. The external control system can be implemented through devices such as terminals or servers. Terminals can be, but are not limited to, various personal computers, laptops, smartphones, tablets, IoT devices, and portable wearable devices. IoT devices can include smart speakers, smart TVs, smart air conditioners, smart vehicle devices, and projection devices. Portable wearable devices can include smartwatches, smart bracelets, and head-mounted displays. Head-mounted displays can be virtual reality (VR) devices, augmented reality (AR) devices, and smart glasses. Servers can be independent physical servers, server clusters or distributed systems composed of multiple physical servers, or cloud servers providing cloud computing services.

[0038] In an exemplary embodiment, as shown in FIG2, an inverse power control method is provided, which is applied to a photovoltaic power generation system including an energy storage module 130, a load module 140 and a photovoltaic module 150. Taking the application of the method to the monitoring module 110 in FIG1 as an example, the method includes the following steps 202 to 206.

[0039] Step 202: Continuously obtain the target power of the photovoltaic grid connection point.

[0040] The photovoltaic grid connection point, located at the junction of the local AC bus and the public power grid, is crucial for the photovoltaic power generation system. As the entry point for electricity to flow from the photovoltaic power generation system to the public power grid, it can then be used to transmit the generated electricity into the grid for use by other users or equipment. Furthermore, the photovoltaic grid connection point in the photovoltaic power generation system is typically equipped with protection devices and control equipment (such as the distribution module 120 described in this application) to monitor and protect the safe operation of the power grid and the photovoltaic system.

[0041] It is understood that the "full self-consumption" grid connection mode addressed in this application is applicable to situations where the load on the load side is large and continuous. In this mode, the electricity generated by the photovoltaic power generation system is mainly used by the user. For similar irreversible grid connection modes, the State Grid stipulates that anti-reverse current devices must be installed to prevent electricity from being fed back from the photovoltaic power generation system to the public grid, i.e., reverse power phenomenon. Meanwhile, for the "full self-consumption" grid connection mode, in order to fully utilize the photovoltaic energy, the optimal state is to dynamically match the output power of the photovoltaic module 150 with the operating power of the load module 140. Under this state, the energy utilization rate of photovoltaic power generation reaches its maximum.

[0042] Specifically, the target power is the power detected in real time at the photovoltaic grid connection point. It can be understood that if reverse power occurs, meaning electricity is fed back from the photovoltaic power generation system to the public grid, the direction of the target power at the photovoltaic grid connection point will be represented as flowing from the local AC bus to the public grid. Conversely, if the output power of the photovoltaic module 150 cannot meet the operating power of the load module 140, power consumption will occur at the photovoltaic grid connection point, meaning electricity is transmitted from the public grid to the photovoltaic power generation system. In this case, the direction of the target power at the photovoltaic grid connection point will be represented as flowing from the public grid to the local AC bus. Therefore, based on the direction and magnitude of the target power, it can be determined whether the target power is in a balanced state, and thus whether the electrical energy of the photovoltaic power generation system is in a balanced state.

[0043] Furthermore, the target power can be detected by the power distribution module 120 located at the photovoltaic grid connection point. After being connected to the power distribution module 120, the monitoring module 110 continuously acquires the target power of the photovoltaic grid connection point to continuously monitor whether reverse power phenomenon occurs, and at the same time monitors whether the output power of the photovoltaic module 150 and the operating power of the load module 140 are dynamically matched.

[0044] For example, the method of continuously acquiring the target power of the photovoltaic grid-connected point can be to continuously acquire the target power of the photovoltaic grid-connected point at predetermined time intervals.

[0045] Step 204 corresponds to the determination that the target power is not in an unbalanced state. At least one of the first, second, and third adjustment mechanisms is executed to dynamically match the output power of the photovoltaic module 150 with the operating power of the load module 140. Specifically, the first adjustment mechanism is used to adjust the operating state of the energy storage module 130, the second adjustment mechanism is used to adjust the operating state of the load module 140, and the third adjustment mechanism is used to control the operating state of the photovoltaic module 150.

[0046] Specifically, the target power not being in a balanced state indicates the presence of power flow at the photovoltaic grid connection point. This could be due to reverse power flow (power being fed back from the photovoltaic power generation system to the public grid) or power consumption (power being fed from the public grid to the photovoltaic power generation system). Therefore, it is necessary to regulate the operating status of each module in the photovoltaic power generation system to dynamically match the output power of the photovoltaic module 150 with the operating power of the load module 140, ensuring no excess power is output to the public grid and no power support is required from the public grid.

[0047] Furthermore, if it is determined that the target power is not in an unbalanced state, corresponding control measures need to be taken to dynamically match the output power of the photovoltaic module 150 with the operating power of the load module 140.

[0048] However, the inventors discovered that current methods for controlling reverse power generation simply involve directly disconnecting the grid-connected circuit breaker or the photovoltaic power generation system when the anti-reverse current device detects reverse power at the photovoltaic grid connection point. This rigid disconnection causes significant electrical shocks to equipment, easily leading to damage, and also results in low energy utilization efficiency for the photovoltaic system. The inventors further discovered that by feeding back the target power of the photovoltaic grid connection point to the photovoltaic inverter, and dynamically adjusting the power output of the photovoltaic modules accordingly, both reverse power generation and power consumption can be avoided. However, this approach is difficult to achieve effective coordination in photovoltaic power generation systems containing multiple photovoltaic modules, and the power limitation parameters can easily become unevenly distributed.

[0049] Based on this, the inventors of this application considered to adjust the working state of the energy storage module 130 (storage side) through a first adjustment mechanism, adjust the working state of the load module 140 (load side) through a second adjustment mechanism, and control the working state of the photovoltaic module 150 (source side) through a third adjustment mechanism, so as to improve the situation where the target power is not in an balanced state by regulating the three dimensions of source-load-storage.

[0050] The first regulation mechanism can be a photovoltaic energy storage mechanism used to regulate the operating state of the energy storage module 130. Specifically, it can regulate the energy storage module 130 to store excess photovoltaic energy in the event of reverse power failure. Alternatively, it can regulate the energy storage module 130 to stop storing energy or even start discharging in the event of power consumption to meet the larger power demand of the load module 140.

[0051] The second adjustment mechanism can be a load flexible matching mechanism to adjust the operating state of the load module 140. This could involve flexibly increasing the load operating power of the load module 140 in the event of reverse power consumption, to absorb more photovoltaic energy generated by the photovoltaic module 150. Alternatively, it could involve flexibly decreasing the load operating power of the load module 140 in the event of power depletion, to absorb less photovoltaic energy.

[0052] The third regulation mechanism can be a photovoltaic power limiting mechanism to regulate the operating state of the photovoltaic module 150. This could involve limiting the power generation of the photovoltaic module 150 in the event of reverse power failure, thereby reducing the photovoltaic energy produced by the photovoltaic module 150. Alternatively, it could involve releasing the power generation of the photovoltaic module 150 in the event of power depletion, thereby increasing the photovoltaic energy produced by the photovoltaic module 150 to meet the larger power demand of the load module 140.

[0053] It is understandable that, if the target power is not in a balanced state, any of the three adjustment mechanisms mentioned above can be selected to dynamically match the output power of the photovoltaic module with the operating power of the load module. If the target power is still not in a balanced state after executing any of the above adjustment mechanisms, another adjustment mechanism can be selected until the output power of the photovoltaic module is dynamically matched with the operating power of the load module.

[0054] The aforementioned reverse power control method continuously acquires the target power of the photovoltaic grid connection point. When it is determined that the target power is not in a balanced state, at least one of the first, second, and third adjustment mechanisms is executed to adjust the working state of the energy storage module 130, the load module 140, and the photovoltaic module 150, respectively. This ensures that the output power of the photovoltaic module 150 and the operating power of the load module 140 are dynamically matched. Based on the energy information network, the method achieves three-way linkage regulation of source-load-storage, preventing the occurrence of reverse power. This not only meets the "full self-consumption" grid connection mode but also significantly improves the utilization rate of photovoltaic power generation.

[0055] 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 in a preset order among the first adjustment mechanism, the second adjustment mechanism, and the third adjustment mechanism.

[0056] Specifically, in order to maximize the utilization of photovoltaic energy, at least one of the first, second, and third regulation mechanisms can be executed in a preset order. The preset order can be determined based on the state of the target power. For example, in the case of reverse power phenomenon, the preset order can be the first regulation mechanism, the second regulation mechanism, and the third regulation mechanism; in the case of power consumption phenomenon, the preset order can be the third regulation mechanism, the second regulation mechanism, and the first regulation mechanism.

[0057] Furthermore, after determining the preset order of the above mechanisms, the first sequence of mechanisms can be executed first. If the target power is still not in a balanced state after executing the first sequence of mechanisms, the second sequence of mechanisms is executed. If the target power is still not in a balanced state after executing the second sequence of mechanisms, the third sequence of mechanisms is executed last. Taking the case of reverse power phenomenon as an example, the first adjustment mechanism can be executed first. If the target power is still not in a balanced state after executing the first adjustment mechanism, the second adjustment mechanism is executed. If the target power is still not in a balanced state after executing the second adjustment mechanism, the third adjustment mechanism is executed last.

[0058] In an exemplary embodiment, as shown in FIG3, 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.

[0059] Step 302 corresponds to determining that the target power is in the reverse power state, and at least one adjustment mechanism is executed in the order of the first adjustment mechanism, the second adjustment mechanism and the third adjustment mechanism.

[0060] Specifically, in the event of reverse power, a first regulation mechanism can be executed first to adjust the operating state of the energy storage module 130, storing excess photovoltaic energy so that it can be utilized by discharging from the energy storage module 130 when needed. Then, a second regulation mechanism can be executed to adjust the operating state of the load module 140, allowing excess photovoltaic energy to be utilized through the load module 140. Finally, a third regulation mechanism, which may result in photovoltaic energy loss, is considered to adjust the operating state of the photovoltaic module 150, limiting its power generation.

[0061] It is understandable that the adjustment mechanisms implemented for each module can be different when the target power is in different states. Taking the adjustment of the operating state of photovoltaic module 150 as an example, in the case of reverse power phenomenon, the third adjustment mechanism needs to make photovoltaic module 150 emit less photovoltaic energy, while in the case of power consumption phenomenon, the third adjustment mechanism needs to make photovoltaic module 150 emit more photovoltaic energy.

[0062] In one exemplary embodiment, the first regulation mechanism includes a first reverse regulation mechanism. Exemplarily, as shown in FIG4, executing the first reverse regulation mechanism includes steps 402 to 404.

[0063] Step 402: Obtain the stored energy of the energy storage module 130.

[0064] Step 404: If the stored energy has not reached the upper limit threshold, set the working mode of the energy storage module 130 to energy storage mode.

[0065] Specifically, the first reverse regulation mechanism is a mechanism that regulates the energy storage module 130 to store more photovoltaic energy. The stored energy of the energy storage module 130 refers to the photovoltaic energy value currently stored in the module, which can be collected by the monitoring module 110 through communication with the energy storage module 130. The upper energy limit threshold is the maximum photovoltaic energy value that the energy storage module 130 can store, which can also be understood as the maximum storage capacity of the energy storage module 130.

[0066] Furthermore, if the stored energy has not reached the upper limit threshold, it indicates that the energy storage module 130 can store more photovoltaic energy. Therefore, the working mode of the energy storage module 130 can be set to energy storage mode to store the excess photovoltaic energy.

[0067] In one exemplary embodiment, the second regulation mechanism includes a second reverse regulation mechanism. Exemplarily, as shown in FIG5, executing the second reverse regulation mechanism includes steps 502 to 504.

[0068] Step 502: Obtain the load operating power of load module 140.

[0069] Step 504: If the load operating power does not reach the upper limit threshold, increase the load operating power of the load module 140.

[0070] Specifically, the second reverse regulation mechanism is a regulation mechanism that adjusts the load module 140 to absorb more photovoltaic energy. The load operating power of the load module 140 represents the real-time photovoltaic energy absorbed by the load module 140, which can be collected by communication between the monitoring module 110 and the load module 140. The power upper limit threshold is the maximum photovoltaic energy value that the load module 140 can absorb.

[0071] Furthermore, if the load operating power does not reach the upper limit threshold, it indicates that the load module 140 can absorb more photovoltaic energy, and thus the load operating power of the load module 140 can be increased to absorb more photovoltaic energy.

[0072] For example, the increase in the load operating power of the load module 140 in the above steps can be a flexible increase in the load operating power of the load module 140. This flexible increase can refer to increasing the load operating power of the load module 140 by adjusting the load's set parameters without affecting normal user operation, thereby enabling it to absorb more photovoltaic energy. Taking an air conditioning unit as an example, the load operating power can be reduced by raising the set temperature or lowering the fan speed. Conversely, when it is necessary to increase the load operating power, these parameters can be adjusted to increase the load operating power, thus achieving a flexible increase.

[0073] In one exemplary embodiment, the third regulation mechanism includes a third reverse regulation mechanism. Exemplarily, implementing the third reverse regulation mechanism includes limiting the power generation of the photovoltaic module 150.

[0074] Specifically, the third reverse regulation mechanism is a regulation mechanism that enables the photovoltaic module 150 to emit less photovoltaic energy. Therefore, when the target power is in the reverse power state, it indicates that the photovoltaic module 150 is emitting too much photovoltaic energy, which cannot be fully absorbed by the load module 140. This limits the power generation of the photovoltaic module 150, so that it emits less photovoltaic energy.

[0075] For example, the photovoltaic module 150 includes a photovoltaic module and an inverter. The photovoltaic module converts the generated DC photovoltaic energy into AC energy through the inverter, and then connects it to the local AC bus. The energy is then transmitted to the energy storage module 130 and the load module 140 through the local AC bus.

[0076] Furthermore, the power generation of the photovoltaic module 150 can be limited by adjusting the operating state of the inverter so that the inverter converts less DC photovoltaic energy into AC.

[0077] In an exemplary embodiment, as shown in FIG6, step 302 includes steps 602 to 606.

[0078] Step 602 corresponds to the determination that the target power is in the reverse power state, and the first reverse adjustment mechanism is executed.

[0079] Step 604: When the stored energy reaches the upper limit threshold and the target power is determined to be in the reverse power state, the second reverse adjustment mechanism is executed.

[0080] Step 606: When the load operating power reaches the upper limit threshold and it is determined that the target power is still in the reverse power state, the third reverse adjustment mechanism is executed.

[0081] Specifically, when it is determined that the target power is in a reverse power state, the stored energy of the energy storage module 130 can be acquired first, and it can be determined whether the stored energy has reached the upper limit threshold. If the stored energy has not reached the upper limit threshold, the operating mode of the energy storage module 130 can be set to energy storage mode to store more photovoltaic energy. Further, if the stored energy has reached the upper limit threshold and the target power is still in a reverse power state, indicating that the first reverse adjustment mechanism has not changed the reverse power phenomenon, the load operating power of the load module 140 can be acquired, and it can be determined whether the load operating power has reached the upper limit threshold. If the load operating power has not reached the upper limit threshold, the load operating power of the load module 140 can be increased to absorb more photovoltaic energy. Further, if the load operating power has reached the upper limit threshold and the target power is still in a reverse power state, indicating that the second reverse adjustment mechanism has not changed the reverse power phenomenon, the power generation of the photovoltaic module 150 can be directly limited to make the photovoltaic module 150 emit less photovoltaic energy and eliminate the reverse power phenomenon at the photovoltaic grid connection point.

[0082] For example, in the above embodiments, if the photovoltaic power generation system includes multiple energy storage modules, then the stored energy and energy upper limit threshold of the aforementioned energy storage modules are both the combined stored energy and energy upper limit threshold of all energy storage modules. Similarly, if the photovoltaic power generation system includes multiple load modules, then the load operating power and power upper limit threshold of the aforementioned load modules are both the combined load operating power and power upper limit threshold of all load modules. If the photovoltaic power generation system includes multiple photovoltaic modules, then the power generation of the photovoltaic modules can also be the combined power generation of all photovoltaic modules.

[0083] Step 304 corresponds to determining that the target power is in a power-consuming state, and at least one adjustment mechanism is executed in the order of the third adjustment mechanism, the second adjustment mechanism, and the first adjustment mechanism.

[0084] Specifically, in the event of power consumption, a third regulation mechanism can be implemented first to adjust the operating state of the photovoltaic module 150, releasing its power generation capacity to obtain more usable photovoltaic energy. Then, a second regulation mechanism can be implemented to adjust the operating state of the load module 140, reducing its operating power to eliminate power consumption. Finally, a first regulation mechanism can be implemented to adjust the operating state of the energy storage module 130, limiting the consumption of its stored photovoltaic energy and utilizing the stored photovoltaic energy to generate electricity.

[0085] In one exemplary embodiment, the first adjustment mechanism includes a first positive adjustment mechanism. Exemplarily, as shown in FIG7, performing the first positive adjustment mechanism includes steps 702 to 706.

[0086] Step 702: Obtain the operating mode and stored energy of the energy storage module 130.

[0087] Step 704: If the working mode of the energy storage module 130 is not the energy storage mode and the stored energy has not reached the lower energy threshold, the working mode of the energy storage module 130 is set to the discharge mode.

[0088] Step 706: If not, control the energy storage module 130 to stop operating.

[0089] Specifically, the first positive regulation mechanism is a mechanism that adjusts the energy storage module 130 to store less photovoltaic energy. Here, the stored energy of the energy storage module 130 refers to the photovoltaic energy value currently stored in the module 130, and the operating mode indicates whether the energy storage module 130 can currently store or release photovoltaic energy, or neither store nor release it. These parameters can be collected by the monitoring module 110 communicating with the energy storage module 130. The lower energy threshold is the minimum photovoltaic energy value that the energy storage module 130 can store, which can also be understood as the minimum storage capacity of the energy storage module 130.

[0090] Furthermore, when the energy storage module 130 is not in energy storage mode and the stored energy has not reached the lower energy threshold, it indicates that the energy storage module 130 is still storing photovoltaic energy and / or still storing photovoltaic energy that can be absorbed. Therefore, the operating mode of the energy storage module 130 can be set to discharge mode to release the absorbable photovoltaic energy stored on it.

[0091] In one exemplary embodiment, the second adjustment mechanism includes a second positive adjustment mechanism. Exemplarily, as shown in FIG8, executing the second positive adjustment mechanism includes steps 802 to 804.

[0092] Step 802: Obtain the load operating power of load module 140.

[0093] Step 804: If the load operating power does not reach the lower power threshold, reduce the load operating power of the load module 140.

[0094] Specifically, the second positive regulation mechanism is a mechanism that adjusts the load module 140 to absorb less photovoltaic energy. The load operating power of the load module 140 represents the real-time photovoltaic energy absorbed by the load module, which can be acquired by the monitoring module 110 through communication with the load module 140. The lower power threshold is the minimum photovoltaic energy value that the load module 140 can absorb.

[0095] Furthermore, if the load operating power does not reach the lower power threshold, it indicates that the load module 140 can absorb even less photovoltaic energy. Therefore, the load operating power of the load module 140 can be lowered to absorb even less photovoltaic energy. Similar to the step of increasing the load operating power of the load module 140 in step 504 above, lowering the load operating power of the load module 140 can also be a flexible reduction of the load operating power of the load module 140.

[0096] In one exemplary embodiment, the third adjustment mechanism includes a third positive adjustment mechanism. Exemplarily, as shown in FIG9, performing the third positive adjustment mechanism includes steps 902 to 904.

[0097] Step 902: Obtain the operating status of the inverter.

[0098] Step 904: When the inverter is in a limited power generation state, release the power generation of the photovoltaic module 150.

[0099] Specifically, the third positive regulation mechanism is a regulation mechanism that enables the photovoltaic module 150 to generate more photovoltaic energy. Therefore, when the target power is in a power-consuming state, indicating that the photovoltaic module 150 is generating too little photovoltaic energy to meet the power consumption demand of the load module 140, the power generation capacity of the photovoltaic module 150 can be released to enable it to generate more photovoltaic energy.

[0100] It is understandable that when the power generation of the photovoltaic module 150 is limited, the inverter's operating state will be adjusted to a limited power generation state, so that the inverter converts less DC photovoltaic energy into AC. Then, when the target power is in a power-consuming state, the limited power generation state of the inverter can be canceled, releasing the power generation of the photovoltaic module 150, allowing the inverter to normally convert all the DC photovoltaic energy generated by the photovoltaic module 150 into AC, thereby achieving the goal of generating more photovoltaic energy.

[0101] In an exemplary embodiment, as shown in FIG10, step 304 includes steps 102 to 106.

[0102] Step 102 corresponds to the determination that the target power is in a power-consuming state, and the third positive adjustment mechanism is executed.

[0103] Step 104: After the photovoltaic module 150 has released its power generation capacity and the target power is still in a power consumption state, the second positive regulation mechanism is executed.

[0104] Step 106: When the load operating power reaches the lower power limit threshold and it is determined that the target power is still in a power consumption state, the first positive adjustment mechanism is executed.

[0105] Specifically, if the target power is determined to be in a power-consuming state, the inverter's operating status can be obtained first to determine if it is in a power-limited state. If so, the power-limiting is lifted to release the power output of the photovoltaic module 150. If the photovoltaic module 150's power output is released and the target power is still determined to be in a power-consuming state, indicating that the third positive regulation mechanism has not changed the power-consuming phenomenon, the load operating power of the load module 140 is further obtained, and it is determined whether the load operating power has reached the lower power limit threshold. If the load operating power has not reached the lower power limit threshold, the load operating power of the load module 140 is reduced to absorb less photovoltaic energy. If the load operating power reaches the lower power limit threshold and the target power is still determined to be in a power-consuming state, indicating that the second positive regulation mechanism has not changed the power-consuming phenomenon, the operating mode and stored energy of the energy storage module 130 are further obtained, and it is determined whether the energy storage module 130's operating mode is energy storage mode and whether the stored energy has reached the lower energy limit threshold. If the energy storage module 130 is not in energy storage mode and the stored energy has not reached the lower energy threshold, then the energy storage module 130 is set to discharge mode to release the photovoltaic energy stored on it and eliminate the reverse power phenomenon at the photovoltaic grid connection.

[0106] It should be understood that although the steps in the flowcharts of the embodiments described above are shown sequentially according to the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the embodiments described above may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but can be executed at different times. The execution order of these steps or stages is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the steps or stages of other steps.

[0107] In an exemplary embodiment, as shown in FIG1, a photovoltaic power generation system is provided, including a monitoring module 110, and a power 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 power distribution module 120 is located between the local AC bus and the public power grid. The monitoring module 110 is used to implement reverse power control of the photovoltaic power generation system according to the reverse power control method provided in the embodiments of this application.

[0108] The solution provided by this photovoltaic power generation system is similar to the solution described in the above-mentioned reverse power control method. Therefore, the specific limitations of one or more photovoltaic power generation system embodiments provided in this application can be found in the limitations of the reverse power control method described above, and will not be repeated here.

[0109] In one specific embodiment, as shown in Figure 11, a photovoltaic power generation system is provided, on which the equipment can be classified according to its working nature. Source-side equipment includes: photovoltaic module 1, photovoltaic module 2, inverter 1, and inverter 2; storage-side equipment includes: energy storage device 1 and energy storage device 2; grid-side equipment includes: power distribution equipment; load-side equipment includes: local load 1 and local load 2. Information-side equipment includes: an energy information monitoring platform.

[0110] Specifically, photovoltaic modules convert direct current (DC) to alternating current (AC) via an inverter and are then connected to the local AC bus. Energy storage devices and local loads are directly connected to the local AC bus. Distribution equipment is installed between the local bus and the public power grid, primarily for voltage level conversion and energy information monitoring. An energy information monitoring platform forms a communication network with the inverter, local loads, energy storage devices, and distribution equipment to acquire energy information from each device.

[0111] The operation mode of the photovoltaic power generation system provided in this embodiment is shown in Figure 12.

[0112] Specifically, after the photovoltaic power generation system starts operating, the power situation at the photovoltaic grid connection point is continuously monitored. If reverse power occurs at the photovoltaic grid connection point (i.e., the power distribution device), the energy information monitoring platform first inquires whether the storage capacity of the energy storage device has reached the upper limit. If it has not reached the upper limit, the first level of regulation mechanism—photovoltaic energy storage—is activated, controlling the energy storage device to enter energy storage mode and storing the excess photovoltaic energy.

[0113] When the storage capacity reaches its upper limit and reverse power still occurs at the photovoltaic grid connection point, the energy information monitoring platform will inquire 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—will be activated to flexibly increase the operating power of the local load and dynamically balance the electrical energy output by photovoltaic power generation.

[0114] When the adjustable operating power of the local load has reached its upper limit and reverse power still occurs at the photovoltaic grid connection point, the energy information monitoring platform activates the third control mechanism—photovoltaic power limitation. By limiting the power generation of photovoltaics, reverse power at the grid connection point is eliminated.

[0115] When no reverse power occurs at the photovoltaic grid-connected point, the energy information monitoring platform determines whether the current grid-connected point's power exceeds the power consumption threshold. If the power consumption threshold is not reached, the entire energy system's electrical energy remains in a relatively balanced state without regulation. Conversely, if the threshold is exceeded, the energy information monitoring platform initiates its regulation mechanism.

[0116] When the power output of the photovoltaic grid-connected point exceeds the power consumption threshold, the energy information monitoring platform first determines whether the inverter is in a state that restricts photovoltaic power generation. If so, the inverter gradually releases the photovoltaic power generation capacity.

[0117] When the inverter has completed releasing its photovoltaic power generation capacity, the photovoltaic modules are operating at their maximum power point, but the grid connection power is still greater than the power consumption threshold, the energy information monitoring platform begins to flexibly adjust the local load, reducing its operating power.

[0118] When the operating power of the local load has been flexibly reduced to the lower limit, but the power at the grid connection point 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 operating. 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 begins to discharge. If so, the energy storage device stops operating.

[0119] In this embodiment, the energy information flow provided by the energy internet can accurately obtain the power direction and magnitude of each node on the power network, and can be controlled in three dimensions: source, load, and storage. Through a triple control mechanism of photovoltaic power limiting, photovoltaic energy storage, and load flexible matching, reverse power at the photovoltaic grid connection point is prevented, which not only meets the "full self-consumption" grid connection mode but also significantly improves the utilization rate of photovoltaic power generation.

[0120] Based on the same inventive concept, this application also provides an inverse power control device for implementing the inverse power control method described above. The solution provided by this device is similar to the implementation described in the above method; therefore, the specific limitations in one or more inverse power control device embodiments provided below can be found in the limitations of the inverse power control method described above, and will not be repeated here.

[0121] In one exemplary embodiment, an inverse power control device is provided, applied to a photovoltaic power generation system including an energy storage module, a load module, and a photovoltaic module, comprising: an acquisition module and an execution module.

[0122] The acquisition module is used to continuously acquire the target power of the photovoltaic grid-connected point.

[0123] An execution module, in response to the determination that the target power is not in an unbalanced state, executes at least one of the first, second, and third adjustment mechanisms to dynamically match the output power of the photovoltaic module with the operating power of the load module. Specifically, the first adjustment mechanism adjusts the operating state of the energy storage module, the second adjustment mechanism adjusts the operating state of the load module, and the third adjustment mechanism controls the operating state of the photovoltaic module.

[0124] In an exemplary embodiment, the execution module is further configured to, when it is determined that the target power is not in a balanced state, execute at least one mechanism in a preset order among the first adjustment mechanism, the second adjustment mechanism, and the third adjustment mechanism.

[0125] In an exemplary embodiment, the execution module is further configured to, when it is determined that the target power is in an inverse power state, execute at least one of the following in the order of the first adjustment mechanism, the second adjustment mechanism, and the third adjustment mechanism; and when it is determined that the target power is in a power consumption state, execute at least one of the following in the order of the third adjustment mechanism, the second adjustment mechanism, and the first adjustment mechanism.

[0126] In one exemplary embodiment, the first regulation mechanism includes a first reverse regulation mechanism.

[0127] The execution module is also used to obtain the stored energy of the energy storage module; if the stored energy has not reached the upper limit threshold, the working mode of the energy storage module is set to energy storage mode.

[0128] In one exemplary embodiment, the second regulation mechanism includes a second reverse regulation mechanism.

[0129] The execution module is also used to obtain the load operating power of the load module; if the load operating power does not reach the upper limit threshold, the load operating power of the load module is increased.

[0130] In one exemplary embodiment, the third regulation mechanism includes a third reverse regulation mechanism.

[0131] The execution module is also used to limit the power generation of the photovoltaic module.

[0132] In an exemplary embodiment, the execution module is further configured to execute a first reverse adjustment mechanism in response to the determination that the target power is in an inverse power state; execute a second reverse adjustment mechanism when the stored energy reaches the energy upper limit threshold and the target power is still in an inverse power state; and execute a third reverse adjustment mechanism when the load operating power reaches the power upper limit threshold and the target power is still in an inverse power state.

[0133] In one exemplary embodiment, the first regulation mechanism includes a first positive regulation mechanism.

[0134] The execution module is also used to obtain the operating mode and stored energy of the energy storage module; if the operating mode of the energy storage module is not the energy storage mode and the stored energy has not reached the lower energy threshold, the operating mode of the energy storage module is set to the discharge mode; otherwise, the energy storage module is controlled to stop operating.

[0135] In one exemplary embodiment, the second regulation mechanism includes a second positive regulation mechanism.

[0136] The execution module is also used to obtain the load operating power of the load module; if the load operating power does not reach the lower power limit threshold, the load operating power of the load module is reduced.

[0137] In one exemplary embodiment, the third regulation mechanism includes a third positive regulation mechanism.

[0138] The execution module is also used to obtain the operating status of the inverter; when the inverter's operating status is limited power generation, it releases the power generation of the photovoltaic module.

[0139] In an exemplary embodiment, the execution module is further configured to execute a third positive adjustment mechanism in response to the determination that the target power is in a power-consuming state; execute a second positive adjustment mechanism when the photovoltaic module has finished releasing its power generation and the target power is still in a power-consuming state; and execute a first positive adjustment mechanism when the load operating power reaches the lower power limit threshold and the target power is still in a power-consuming state.

[0140] Each module in the aforementioned reverse power control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in the processor of a computer device in hardware form or independent of it, or stored in the memory of a computer device in software form, so that the processor can call and execute the operations corresponding to each module.

[0141] In an exemplary embodiment, a computer device is provided, which may be a terminal. The computer device includes a processor, memory, an input / output interface, a communication interface, a display unit, and an input device. The processor, memory, and input / output interface are connected via a system bus, and the communication interface, display unit, and input device are also connected to the system bus via the input / output interface. The processor of the computer device provides computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores an operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The input / output interface of the computer device is used for exchanging information between the processor and external devices. The communication interface of the computer device is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, mobile cellular networks, Near Field Communication (NFC), or other technologies. When the computer program is executed by the processor, it implements an inverse power control method. The display unit of the computer device is used to form a visually visible image and may be a display screen, a projection device, or a virtual reality imaging device. The display screen can be an LCD screen or an e-ink screen. The input device of the computer device can be a touch layer covering the display screen, or buttons, trackballs, or touchpads set on the casing of the computer device, or external keyboards, touchpads, or mice, etc.

[0142] In one exemplary embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above-described method embodiments.

[0143] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0144] In one embodiment, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps in the above method embodiments.

[0145] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this 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. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, artificial intelligence (AI) processors, etc., and are not limited to these.

[0146] The technical features of the above embodiments can be combined in any way. For the sake of brevity, 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.

[0147] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A reverse power control method applied to a photovoltaic power generation system comprising an energy storage module, a load module and a photovoltaic module, characterized in that, The method includes: Continuously acquire the target power of photovoltaic grid-connected points; In response to the determination that the target power is not in an balanced state, at least one mechanism is executed among the first adjustment mechanism, the second adjustment mechanism, and the third adjustment mechanism; 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.

2. The method of claim 1, wherein, The determination corresponding to the target power not being in an balanced state involves executing at least one mechanism among the first, second, and third adjustment mechanisms, including: In response to the determination that the target power is not in an balanced state, at least one of the first, second, and third adjustment mechanisms is executed in a preset order.

3. The method of claim 2, wherein, Corresponding to the determination that the target power is not in an balanced state, at least one mechanism among the first, second, and third adjustment mechanisms is executed in a preset order, including: Corresponding to the determination that the target power is in the inverse power state, at least one mechanism shall be executed in the order of the first adjustment mechanism, the second adjustment mechanism, and the third adjustment mechanism.

4. The method of claim 3, wherein, The first regulation mechanism includes a first reverse regulation mechanism; Executing the first reverse adjustment mechanism includes: Obtain the stored energy of the energy storage module; If the stored energy has not reached the upper limit threshold, the working mode of the energy storage module is set to energy storage mode.

5. The method of claim 4, wherein, The second regulatory mechanism includes a second inverse regulatory mechanism; Executing the second reverse regulation mechanism includes: Obtain the load operating power of the load module; If the load operating power does not reach the upper limit threshold, the load operating power of the load module is increased.

6. The method of claim 5, wherein, The third regulatory mechanism includes a third inverse regulatory mechanism; The third reverse regulation mechanism includes limiting the power generation of the photovoltaic module.

7. The method of claim 6, wherein, Corresponding to the determination that the target power is in an inverse power state, at least one of the following mechanisms is executed in the order of the first adjustment mechanism, the second adjustment mechanism, and the third adjustment mechanism: Corresponding to the determination that the target power is in an inverse power state, the first reverse adjustment mechanism is executed; If the stored energy reaches the upper limit threshold and it is determined that the target power is still in an inverse power state, the second reverse adjustment mechanism is executed. When the load operating power reaches the upper power limit threshold and it is determined that the target power is still in an inverse power state, the third reverse adjustment mechanism is executed.

8. The method of claim 2, wherein, In response to the determination that the target power is not in an unbalanced state, at least one mechanism among the first, second, and third adjustment mechanisms is executed in a preset order, including: in response to the determination that the target power is in a power-consuming state, at least one mechanism is executed in the order of the third, second, and first adjustment mechanisms.

9. The method of claim 8, wherein, The first regulation mechanism includes a first positive regulation mechanism; Executing the first positive regulation mechanism includes: Obtain the operating mode and stored energy of the energy storage module; If the energy storage module is not in energy storage mode and the stored energy has not reached the lower energy threshold, the energy storage module is set to discharge mode. If not, control the energy storage module to stop operating.

10. The method of claim 9, wherein, The second regulatory mechanism includes a second positive regulatory mechanism; Executing the second positive regulation mechanism includes: Obtain the load operating power of the load module; If the load operating power does not reach the lower power limit threshold, the load operating power of the load module shall be reduced.

11. The method of claim 10, wherein, The third regulatory mechanism includes a third positive regulatory mechanism; Executing the third positive regulation mechanism includes: Obtain the operating status of the inverter; When the inverter is in a limited power generation state, the power generation capacity of the photovoltaic module is released.

12. The method of claim 11, wherein, The determination of the target power being in a power-consuming state is performed by executing at least one of the following mechanisms in the order of the third adjustment mechanism, the second adjustment mechanism, and the first adjustment mechanism: Based on the determination that the target power is in a power-consuming state, the third positive adjustment mechanism is executed; When the photovoltaic module has finished releasing its power generation capacity and it is determined that the target power is still in a power consumption state, the second positive adjustment mechanism is executed. When the load operating power reaches the lower power limit threshold and it is determined that the target power is still in a power-consuming state, the first positive adjustment mechanism is executed.

13. The method of claim 1, wherein, Continuously acquiring the target power of the photovoltaic grid-connected point includes continuously acquiring the target power of the photovoltaic grid-connected point at predetermined time intervals.

14. A reverse power control device, applied to a photovoltaic power generation system including an energy storage module, a load module, and a photovoltaic module, comprising: The acquisition module is used to continuously acquire the target power of the photovoltaic grid-connected point; An execution module is configured to execute at least one of a first adjustment mechanism, a second adjustment mechanism, and a third adjustment mechanism in response to the determination that the target power is not in an unbalanced state; wherein the first adjustment mechanism is used to adjust the operating state of the energy storage module, the second adjustment mechanism is used to adjust the operating state of the load module, and the third adjustment mechanism is used to control the operating state of the photovoltaic module.

15. A photovoltaic power system, characterized by The system includes a monitoring module, and a power 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 power distribution module is located between the local AC bus and the public power grid. The monitoring module is used to implement reverse power control of the photovoltaic power generation system according to any one of claims 1 to 13.

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