Flexible regulation method and device for remaining power internet access, computer device and storage medium

Abstract

The present application relates to the technical field of smart internet of things electric energy meter realizing distributed photovoltaic power generation regulation, and discloses a flexible regulation method and device for surplus electricity grid connection, computer equipment and a storage medium, which are applied to a flexible regulation system, and the flexible regulation system comprises a photovoltaic inverter; the method comprises the following steps: acquiring a property boundary point power and a power generation metering point power; calculating a power generation power difference value based on the property boundary point power and a preset power generation power control parameter; calculating a power generation side real-time power control limit value based on the power generation power difference value and the power generation metering point power; and performing flexible regulation on the power generation power of the photovoltaic inverter based on the power generation side real-time power control limit value. The present application realizes flexible regulation on the photovoltaic inverter in the mode of surplus electricity grid connection of photovoltaic power generation in a transformer area, improves the regulation accuracy when the photovoltaic inverter is regulated and controlled in groups, and ensures the safety and stable operation of the power grid.

Description

Technical Field

[0001] This invention relates to the field of distributed photovoltaic power generation regulation technology using smart IoT energy meters, specifically to a flexible regulation method, device, computer equipment, and storage medium for grid connection of surplus electricity. Background Technology

[0002] Currently, we are vigorously promoting the shift from "dual control" of energy consumption to "dual control" of total carbon emissions and intensity, improving incentive and constraint policies for pollution reduction and carbon reduction, and accelerating the formation of green production and lifestyles. Guided by the development needs of a new power system with new energy as the main body and promoting the high-quality development of low-voltage distributed photovoltaic, and following the principles of "minimum curtailment, fairness for people's livelihood, priority of incentives, and precision and efficiency", we are giving full play to the existing resource advantages of the electricity information collection system and exploring the models and technical routes for low-voltage distributed photovoltaic to participate in grid regulation.

[0003] Relevant regulations require large-scale photovoltaic (PV) power generation to be equipped with a certain proportion of energy storage devices, while there are no mandatory energy storage requirements for industrial, commercial, and residential PV systems. However, the widespread grid connection of distributed PV systems has raised grid security issues, necessitating regulation. For PV power generation with surplus electricity fed into the grid, when the entire distribution area (an area where one or more transformers supply power to users) is subject to group regulation and control, such as when regulating power generation at the property boundary, there are issues with inaccurate regulation. Summary of the Invention

[0004] In view of this, the present invention provides a flexible regulation method, device, computer equipment and storage medium for surplus electricity fed into the grid, in order to solve the problem of inaccurate regulation when the distribution area is subject to group regulation and control for photovoltaic power generation surplus electricity fed into the grid.

[0005] In a first aspect, the present invention provides a flexible regulation method for feeding surplus electricity into the grid, applied to a flexible regulation system, the flexible regulation system including a photovoltaic inverter; the method includes:

[0006] Obtain the power at the property boundary point and the power at the power generation metering point;

[0007] Calculate the power generation difference based on the power at the property boundary point and the preset power generation control parameters;

[0008] Calculate the real-time power control limit on the power generation side based on the power generation power difference and the power at the power generation metering point;

[0009] The power generation of the photovoltaic inverter is flexibly adjusted based on the real-time power control limit on the power generation side.

[0010] The flexible regulation method for surplus power fed into the grid provided by this invention simultaneously collects power data from the property boundary point and the power generation metering point, calculates the real-time power control limit on the power generation side, and uses the real-time power control limit on the power generation side as a regulation coefficient to flexibly regulate the photovoltaic inverter. This achieves flexible regulation of photovoltaic inverters in the grid-connected surplus power mode, improves the accuracy of regulation when regulating photovoltaic inverters in the grid, ensures grid safety and stable operation, and solves the problem of inaccurate regulation when regulating photovoltaic inverters in the grid-connected surplus power mode.

[0011] In one optional implementation, the flexible control system further includes IoT energy meters, which are installed at the property boundary point and the power generation metering point, respectively. Obtaining the power at the property boundary point and the power at the power generation metering point includes:

[0012] The power of the IoT energy meter at the property boundary point is collected as the power at the property boundary point;

[0013] The power of the IoT energy meter at the power generation metering point is collected as the power of the power generation metering point.

[0014] The flexible regulation method for surplus power fed into the grid provided by this invention collects the power at the property boundary point and the power at the power generation metering point through IoT energy meters. This ensures that the collected power at the property boundary point and the power at the power generation metering point are accurate and reliable, providing conditions for subsequent calculation of the regulation coefficient of the real-time power control limit on the power generation side.

[0015] In one optional implementation, the formula for calculating the power generation difference based on the power at the property boundary point and the preset power generation control parameters is as follows:

[0016] ΔE = E0 + E1;

[0017] Where ΔE is the power generation difference, E0 is the preset power generation control parameter, and E1 is the power at the property boundary point.

[0018] In one optional implementation, the formula for calculating the real-time power control limit on the power generation side based on the power generation difference and the power at the power generation metering point is as follows:

[0019] E = |E² + ΔE|;

[0020] Where E is the real-time power control limit on the power generation side, and E2 is the power at the power generation metering point.

[0021] The flexible regulation method for surplus power fed into the grid provided by this invention calculates the power generation difference between the power at the property boundary point and the preset power generation control parameters, and calculates the real-time power control limit on the power generation side based on the power generation difference and the power at the power metering point. This achieves accurate calculation of the real-time power control limit on the power generation side, providing conditions for subsequent flexible regulation of photovoltaic inverters.

[0022] In one optional implementation, flexibly regulating the power generation of the photovoltaic inverter based on the real-time power control limit on the generation side includes:

[0023] When the power generation of the photovoltaic inverter is less than or equal to the real-time power control limit on the generation side, the power generation of the photovoltaic inverter is adjusted in real time based on the real-time power control limit on the generation side.

[0024] When the real-time power control limit on the power generation side is equal to the preset power threshold, the power generation of the photovoltaic inverter is adjusted according to the power of the power generation metering point.

[0025] The flexible regulation method for surplus power fed into the grid provided by this invention uses the real-time power control limit on the power generation side as a regulation coefficient to regulate the photovoltaic inverter in real time or during a specific time period, thereby avoiding power generation imbalance of the photovoltaic inverter, regulating the power generation on the power generation side of the photovoltaic inverter in real time, ensuring maximum power generation, and improving the accuracy of power generation regulation of the photovoltaic inverter.

[0026] In one optional implementation, the flexible control system further includes a data interaction module connected to the photovoltaic inverter. The flexible control method for feeding surplus electricity into the grid also includes:

[0027] When the power generation of a photovoltaic power station exceeds the real-time power control limit on the generation side, the flexible control is deemed to have failed.

[0028] When flexible regulation fails, the IoT energy meter at the power generation metering point sends a regulation command to the photovoltaic inverter to reduce the power generation or performs rigid regulation on the photovoltaic inverter through the data interaction module.

[0029] The flexible regulation method for surplus power fed into the grid provided by this invention, when flexible regulation fails, the IoT energy meter at the power generation metering point sends a regulation command to the photovoltaic inverter to reduce the power generation or performs rigid regulation on the photovoltaic inverter through the data interaction module. It monitors the power generation of the photovoltaic inverter in real time and performs rigid regulation on the photovoltaic inverter to prevent excessive power generation and ensure grid safety.

[0030] In one optional implementation, the flexible control system further includes a photovoltaic circuit breaker and a master station; the photovoltaic circuit breaker is connected to the photovoltaic inverter.

[0031] Rigid regulation of photovoltaic inverters includes:

[0032] Disconnect the photovoltaic circuit breaker from the photovoltaic inverter to trip the photovoltaic inverter, and report the photovoltaic inverter tripping status to the main station in sequence through the IoT energy meter at the power generation metering point and the IoT energy meter at the property boundary point.

[0033] The flexible regulation method for surplus power grid connection provided by this invention disconnects the photovoltaic circuit breaker from the photovoltaic inverter to trip the photovoltaic inverter, and then reports the photovoltaic inverter tripping status to the main station through the IoT energy meter at the power generation metering point and the IoT energy meter at the property boundary point in sequence, thereby achieving rigid regulation. This allows the main station to promptly schedule and control the power generation situation and optimize the power generation of the grid.

[0034] Secondly, the present invention provides a flexible regulation device for surplus power fed into the grid, applied to a flexible regulation system, the flexible regulation system including a photovoltaic inverter; the device includes:

[0035] The power acquisition module is used to acquire the power at the property boundary point and the power at the power generation metering point;

[0036] The difference calculation module is used to calculate the power generation difference based on the power at the property boundary point and the preset power generation control parameters.

[0037] The limit calculation module is used to calculate the real-time power control limit on the power generation side based on the power generation power difference and the power at the power generation metering point;

[0038] The flexible control module is used to flexibly control the power generation of the photovoltaic inverter based on the real-time power control limit on the power generation side.

[0039] Thirdly, the present invention provides a computer device, comprising: a memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the flexible control method for surplus power grid connection described in the first aspect or any corresponding embodiment.

[0040] Fourthly, the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the flexible control method for surplus power grid connection described in the first aspect or any corresponding embodiment thereof. Attached Figure Description

[0041] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0042] Figure 1 This is a flowchart illustrating a flexible control method for surplus power grid connection according to an embodiment of the present invention;

[0043] Figure 2This is a flowchart illustrating another flexible regulation method for surplus power grid connection according to an embodiment of the present invention;

[0044] Figure 3 This is a flowchart illustrating another flexible control method for surplus power grid connection according to an embodiment of the present invention;

[0045] Figure 4 This is a topology diagram of a flexible control system according to an embodiment of the present invention;

[0046] Figure 5 This is a structural block diagram of a flexible control device for surplus power grid connection according to an embodiment of the present invention;

[0047] Figure 6 This is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present invention. Detailed Implementation

[0048] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Grid connection of surplus electricity refers to the photovoltaic power generation system prioritizing its own use of the electricity. When the electricity is insufficient to meet its own needs, it is supplemented by the power grid; the surplus electricity can be sold back to the power grid. This model can both meet the user's electricity needs and sell surplus electricity to the power grid, bringing additional revenue.

[0049] The working principle of the surplus electricity fed into the grid mode is that the electricity generated by the photovoltaic power generation system is first used by the user. If the power generation is insufficient to meet the user's demand, the grid will supplement the power supply. When the power generation exceeds the user's demand, the excess electricity can be sold back to the grid. In this mode, two meters are typically used for metering: one kilowatt-hour meter to measure the electricity generated by the photovoltaic system, and another bidirectional meter to measure the electricity flowing up and down the grid. Both meters can be IoT smart meters. For the surplus electricity fed into the grid mode of photovoltaic power generation, when the entire distribution area is under group control, there is a problem of inaccurate control, such as regulating power generation at the property boundary point. Figure 4 As shown, in this embodiment of the invention, a flexible control system is used to realize the group control of photovoltaic power generation in the distribution area, and 4G Internet of Things meters are installed at both the property boundary point and the power generation metering point.

[0050] This invention provides a flexible regulation method for surplus power to the grid. By simultaneously collecting power data from the property boundary point and the power generation metering point and calculating the dispatch coefficient, the photovoltaic inverter is flexibly regulated to achieve precise regulation when controlling power generation at the property boundary point.

[0051] According to an embodiment of the present invention, a flexible regulation method for surplus power to the grid is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0052] This embodiment provides a flexible regulation method for feeding surplus power into the grid, which can be used in flexible regulation systems, such as... Figure 4 As shown, the flexible control system includes a photovoltaic inverter. Figure 1 This is a flowchart of a flexible regulation method for surplus power grid connection according to an embodiment of the present invention, as follows: Figure 1 As shown, the process includes the following steps:

[0053] Step S101: Obtain the power at the property boundary point and the power at the power generation metering point.

[0054] Specifically, the property boundary point refers to the dividing line between the maintenance and management scope of electrical equipment between the power supply department and the user, based on ownership. The power generation metering point is the point of contact between the customer and the power company, where electricity consumption is measured, serving as a primary basis for electricity bill assessment. Power at the property boundary point and the power generation metering point can be collected through IoT-enabled energy meters.

[0055] Step S102: Calculate the power generation difference based on the power at the property boundary point and the preset power generation control parameters.

[0056] Specifically, the preset power generation control parameter, also known as the power generation control power or rated power, refers to the maximum power that the generator can continuously output under rated speed and rated voltage conditions. The power generation difference is calculated by comparing the power at the property boundary point with the preset power generation control parameter.

[0057] Step S103: Calculate the real-time power control limit on the power generation side based on the power generation power difference and the power at the power generation metering point.

[0058] Specifically, the real-time power control limit on the generator side refers to the maximum real-time power output of the photovoltaic inverter on the generator side. The real-time power control limit on the generator side is calculated using the power output difference and the power output at the metering point.

[0059] Step S104: Flexibly regulate the power generation of the photovoltaic inverter based on the real-time power control limit on the power generation side.

[0060] Specifically, flexible regulation refers to adjusting the power output of photovoltaic (PV) inverters through flexible measures, such as adjusting generator output, controlling load, and adjusting transmission lines, to maintain stable operation of PV inverters. Flexible regulation of PV inverter power output is based on real-time power control limits on the generator side. For example, when the PV inverter's power output is less than or equal to the real-time power control limit on the generator side, a real-time regulation strategy is implemented. When the real-time power control limit issued by the upper-level master station is 0, the real-time regulation strategy fails, and the system switches to meter-based time-of-use regulation at the power generation metering point.

[0061] The flexible regulation method for surplus power fed into the grid provided in this embodiment simultaneously collects power data from the property boundary point and the power generation metering point, calculates the real-time power control limit on the power generation side, and uses the real-time power control limit on the power generation side as a regulation coefficient to flexibly regulate the photovoltaic inverter. This achieves flexible regulation of photovoltaic inverters in the grid-connected surplus power mode, improves the accuracy of regulation when regulating photovoltaic inverters in the grid, ensures grid safety and stable operation, and solves the problem of inaccurate regulation when regulating photovoltaic inverters in the grid-connected surplus power mode.

[0062] This embodiment provides a flexible regulation method for feeding surplus power into the grid, which can be used in flexible regulation systems. Figure 2 This is a flowchart of a flexible regulation method for surplus power grid connection according to an embodiment of the present invention, as follows: Figure 2 As shown, the process includes the following steps:

[0063] Step S201: Obtain the power at the property boundary point and the power at the power generation metering point.

[0064] Specifically, such as Figure 4 As shown, the flexible control system also includes IoT energy meters, which are installed at the property boundary point and the power generation metering point. The IoT energy meters are 4G IoT energy meters. The above step S201 includes:

[0065] Step S2011: Collect the power of the IoT energy meter at the property boundary point as the power of the property boundary point.

[0066] Specifically, the power of the IoT energy meters installed at the property boundary point is collected as the property boundary point power.

[0067] Step S2012: Collect the power of the IoT energy meter at the power generation metering point as the power of the power generation metering point.

[0068] Specifically, the power of the IoT energy meters installed at the power generation metering point is collected as the power of the power generation metering point.

[0069] The upper-level main station obtains instantaneous quantities such as the power at the property boundary point and the power at the power metering point of all photovoltaic power generation users in the distribution area through the 4G network.

[0070] Step S202: Calculate the power generation difference based on the power at the property boundary point and the preset power generation control parameters.

[0071] Specifically, the formula for calculating the power generation difference based on the power at the property boundary point and the preset power generation control parameters is as follows:

[0072] ΔE = E0 + E1;

[0073] Where ΔE is the power generation difference, E0 is the preset power generation control parameter, and E1 is the power at the property boundary point.

[0074] Step S203: Calculate the real-time power control limit on the power generation side based on the power generation power difference and the power at the power generation metering point.

[0075] Specifically, the formula for calculating the real-time power control limit on the power generation side based on the power generation difference and the power at the power generation metering point is as follows:

[0076] E = |E² + ΔE|;

[0077] Where E is the real-time power control limit on the generation side, and E2 is the power at the generation metering point. Assuming the preset generation power control parameter E0 = 10kW, examples of calculating the controlled power under different generation conditions are as follows:

[0078] Example 1: E1=-15kW, E2=+50kW;

[0079] ΔE = 10 + (-15) = -5kW;

[0080] E=∣+50+(-5)∣=45kW.

[0081] Example 2: E1=-9kW, E2=+50kW;

[0082] ΔE = 10 + (-9) = 1kW;

[0083] E = | + 50 + 1 | = 51 kW.

[0084] Example 3: E1 = +25kW, E2 = +50kW;

[0085] ΔE = 10 + (+25) = 35kW;

[0086] E = | + 50 + 35 | = 85 kW.

[0087] Step S204: Flexible regulation of the photovoltaic inverter's power generation is performed based on the real-time power control limit on the generation side. For details, please refer to [link to details]. Figure 1 Step S104 of the illustrated embodiment will not be described again here.

[0088] The flexible regulation method for surplus power fed into the grid provided in this embodiment collects power data at the property boundary point and the power generation metering point using IoT energy meters. This ensures the accuracy and reliability of the collected power data, providing the basis for calculating the regulation coefficient for the real-time power control limit on the generation side. The difference in power generation is calculated by comparing the power at the property boundary point with preset power generation control parameters. Based on this difference and the power at the power generation metering point, the real-time power control limit on the generation side is calculated, achieving accurate calculation of the real-time power control limit and providing the basis for subsequent flexible regulation of the photovoltaic inverter.

[0089] This embodiment provides a flexible regulation method for feeding surplus power into the grid, which can be used in flexible regulation systems. Figure 3 This is a flowchart of a flexible regulation method for surplus power grid connection according to an embodiment of the present invention, as follows: Figure 3 As shown, the process includes the following steps:

[0090] Step S301: Obtain the power at the property boundary point and the power at the power generation metering point. For details, please refer to [link to relevant documentation]. Figure 2 Step S201 of the illustrated embodiment will not be described again here.

[0091] Step S302: Calculate the power generation difference based on the power at the property boundary point and the preset power generation control parameters. For details, please refer to [link to relevant documentation]. Figure 2 Step S202 of the illustrated embodiment will not be described again here.

[0092] Step S303: Calculate the real-time power control limit on the generation side based on the power generation difference and the power at the power generation metering point. For details, please refer to [link to relevant documentation]. Figure 2 Step S203 of the illustrated embodiment will not be described again here.

[0093] Step S304: Flexibly regulate the power generation of the photovoltaic inverter based on the real-time power control limit on the power generation side.

[0094] Specifically, step S304 includes:

[0095] Step S3041: When the power generation of the photovoltaic inverter is less than or equal to the real-time power control limit on the power generation side, the power generation of the photovoltaic inverter is adjusted in real time based on the real-time power control limit on the power generation side.

[0096] Specifically, the upper-level master station sends the real-time power control limit on the power generation side to the IoT energy meter on the power generation side, that is, the IoT energy meter at the power generation metering point, and regulates the power generation of the photovoltaic inverter to not exceed the real-time power control limit on the power generation side, that is, the power generation of the photovoltaic inverter is regulated in real time based on the real-time power control limit on the power generation side.

[0097] Step S3042: When the real-time power control limit on the power generation side is equal to the preset power threshold, the power generation of the photovoltaic inverter is adjusted according to the power of the power generation metering point.

[0098] Specifically, in this embodiment, the preset power threshold is set to 0. When the real-time power control limit value issued by the upper-level master station on the power generation side is 0, the real-time control fails and is switched to the time-period control of the IoT energy meter at the power generation metering point. That is, the power generation of the photovoltaic inverter is controlled based on the power of the power generation metering point, so that the power generation of the photovoltaic inverter is not greater than the power of the power generation metering point.

[0099] like Figure 4 As shown, the flexible control system also includes a data interaction module, which is connected to the photovoltaic inverter.

[0100] Step S305: When the power generation of the photovoltaic power station exceeds the real-time power control limit on the power generation side, it is determined that the flexible control has failed. When the flexible control fails, the IoT energy meter at the power generation metering point sends a control command to the photovoltaic inverter to reduce the power generation or performs rigid control on the photovoltaic inverter through the data interaction module.

[0101] Specifically, the flexible control system also includes a photovoltaic circuit breaker and a master station; the photovoltaic circuit breaker is connected to the photovoltaic inverter; the photovoltaic circuit breaker adopts a photovoltaic Bluetooth circuit breaker, and the above step S305 includes:

[0102] Step a. Disconnect the photovoltaic circuit breaker from the photovoltaic inverter to trip the photovoltaic inverter, and report the photovoltaic inverter tripping status to the main station sequentially through the IoT energy meter at the power generation metering point and the IoT energy meter at the property boundary point. Specifically, when flexible control fails, rigid control (state control) is implemented. This involves detecting the photovoltaic inverter's power generation, and the IoT energy meter at the power generation metering point sending a control command to the photovoltaic inverter to reduce the power generation through the data interaction module. If the power limit for the time period (i.e., the power at the power generation metering point) is exceeded, the IoT energy meter controls the photovoltaic Bluetooth circuit breaker to trip and reports the tripping status to the upper-level main station.

[0103] The flexible regulation method for surplus power fed into the grid provided in this embodiment, when flexible regulation fails, sends a regulation command to the photovoltaic inverter via the data interaction module to reduce the power generation, or performs rigid regulation on the photovoltaic inverter. This method monitors the photovoltaic inverter's power generation in real time and prevents excessive power generation, ensuring grid safety. Disconnecting the photovoltaic circuit breaker from the photovoltaic inverter causes it to trip, and the tripping information is reported to the main station sequentially through the photovoltaic metering point's IoT energy meter and the property boundary point's IoT energy meter. This allows the main station to promptly schedule and control power generation, optimizing the grid's power output.

[0104] As one or more specific application embodiments of the present invention, combined with Figure 4 The flexible regulation method for surplus power to be fed into the grid provided by this invention will be further described in detail below:

[0105] Considering that industrial and commercial users typically have large and non-negligible loads, the surplus electricity that accounts for 90% of the total electricity supply to the grid (such as...) Figure 4 (As shown in the right box), the dispatch system needs to control the power generation status at the property boundary point and the power generation metering point. This solution uses a master station, smart terminals, smart IoT energy meters (including photovoltaic equipment data interaction modules), photovoltaic Bluetooth smart circuit breakers, and photovoltaic inverters to achieve photovoltaic group dispatch and control. 4G IoT energy meters are installed at both the property boundary point and the power generation metering point. For example... Figure 4 The left frame section represents the area where, when all electricity is fed into the grid, all power generated by the photovoltaic inverter is sold to the grid. This embodiment does not consider the regulation situation of this full grid connection. For example... Figure 4 In the right-hand frame, the main station obtains the power at the property boundary and the power at the power metering point of all photovoltaic power generation users via a private wireless network, 4G network, or Ethernet, and issues control commands for the power generation of the photovoltaic inverter. The communication protocol used in this embodiment is DL / T698.45. An IoT energy meter or a 20A energy meter is installed at the property boundary. This IoT energy meter or 20A energy meter includes a 4G communication module. The IoT energy meter at the property boundary is connected to the user load (smart terminal) and the power metering point IoT energy meter. The power metering point IoT energy meter, the photovoltaic Bluetooth circuit breaker, and the photovoltaic inverter are connected in sequence. The photovoltaic inverter is connected to the household photovoltaic system. The power metering point IoT energy meter is also connected to the photovoltaic inverter via an RS485 bus. The power metering point IoT energy meter includes a 4G communication module and a data interaction module. The specific implementation steps of the flexible control method for surplus power fed into the grid are as follows:

[0106] 1) The main station obtains instantaneous quantities such as the property boundary power E1 (signed number, negative if reversed) and the power E2 at the power generation metering point of all photovoltaic power generation users in the distribution area through the 4G network.

[0107] 2) The main station calculates the power generation of each photovoltaic power generation user and the real-time power control limit on the power generation side based on the daily power generation plan of all photovoltaic power generation users.

[0108] First, calculate the power generation difference, which is ΔE = power generation control parameter for the user's time period (denoted as E0, a positive number) + E1. Then, calculate the real-time power control limit on the power generation side, E = |reverse power at the power generation metering point + ΔE|.

[0109] 3) The main station sends the real-time power control limit E of the power generation side to the IoT energy meter at the power generation metering point through the 4G network.

[0110] 4) The IoT energy meter at the power generation metering point issues commands through the data interaction module to control the power generation of the photovoltaic inverter, achieving flexible regulation. Flexible regulation includes:

[0111] The real-time power control limit E on the power generation side is sent to the IoT energy meter at the power generation metering point, and the power generation of the photovoltaic inverter is controlled by the IoT energy meter at the power generation metering point to ensure that it does not exceed E.

[0112] When the real-time power control limit on the power generation side is equal to the preset power threshold of 0, the real-time control fails and switches to time-based control of the IoT energy meter at the power generation metering point, that is, time-based control of the power generation of the photovoltaic inverter based on the power of the power generation metering point.

[0113] 5) When the power generation of the photovoltaic power station exceeds the real-time power control limit on the generation side, flexible control is deemed to have failed. When flexible control fails, rigid control (state control) is implemented: the power generation of the photovoltaic inverter is detected, and the IoT energy meter at the power generation metering point sends a control command to the photovoltaic inverter to reduce the power generation through the data interaction module. If the power limit for the time period (i.e., the power at the power generation metering point) is exceeded, the IoT energy meter controls the photovoltaic Bluetooth circuit breaker to trip and reports to the superior master station.

[0114] The flexible regulation method for surplus power fed into the grid provided in this embodiment collects the power at the property boundary point and the power at the power generation metering point through IoT energy meters, calculates the real-time power control limit on the power generation side, and uses the real-time power control limit on the power generation side as the regulation coefficient to flexibly regulate the photovoltaic inverter. This realizes flexible regulation when performing group regulation and control of photovoltaic inverters in the photovoltaic power generation surplus power fed into the grid, and improves the accuracy of regulation when performing group regulation and control of photovoltaic inverters. The connection between the photovoltaic circuit breaker and the photovoltaic inverter is disconnected to trip the photovoltaic inverter, and the tripping status of the photovoltaic inverter is reported to the main station through the IoT energy meters at the power generation metering point and the IoT energy meters at the property boundary point in sequence. This allows the main station to promptly dispatch and control the power generation situation and optimize the power generation of the grid in a timely manner.

[0115] This embodiment also provides a flexible control device for feeding surplus power into the grid. This device is used to implement the above embodiments and preferred embodiments, and will not be repeated as already described. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware implementation, or a combination of software and hardware, is also possible and contemplated.

[0116] This embodiment provides a flexible control device for feeding surplus electricity into the grid, applied to a flexible control system, which includes a photovoltaic inverter; such as... Figure 5 As shown, it includes:

[0117] The power acquisition module 501 is used to acquire the power at the property boundary point and the power at the power generation metering point.

[0118] The difference calculation module 502 is used to calculate the power generation difference based on the power at the property boundary point and the preset power generation control parameters.

[0119] The limit calculation module 503 is used to calculate the real-time power control limit on the power generation side based on the power generation power difference and the power at the power generation metering point.

[0120] The flexible control module 504 is used to flexibly control the power generation of the photovoltaic inverter based on the real-time power control limit on the power generation side.

[0121] In some optional implementations, the flexible control system also includes IoT energy meters, which are installed at the property boundary point and the power generation metering point, respectively. The power acquisition module 501 includes:

[0122] The first data acquisition unit is used to collect the power of the IoT energy meter at the property boundary point as the power at the property boundary point.

[0123] The second acquisition unit is used to acquire the power of the IoT energy meter at the power generation metering point as the power of the power generation metering point.

[0124] In some alternative implementations, the flexible control module 504 includes:

[0125] The real-time control unit is used to adjust the power generation of the photovoltaic inverter in real time based on the real-time power control limit on the power generation side when the power generation of the photovoltaic inverter is less than or equal to the real-time power control limit on the power generation side.

[0126] The time-period control unit is used to regulate the power generation of the photovoltaic inverter based on the power of the power generation metering point when the real-time power control limit on the power generation side is equal to the preset power threshold.

[0127] In some alternative implementations, the flexible control device for surplus power fed into the grid also includes:

[0128] The non-flexible control module is used to determine that flexible control has failed when the power generation of the photovoltaic power station exceeds the real-time power control limit on the generation side. When flexible control fails, the IoT energy meter at the power generation metering point sends a control command to the photovoltaic inverter to reduce the power generation or performs rigid control on the photovoltaic inverter through the data interaction module.

[0129] In some optional implementations, the flexible control system further includes a photovoltaic circuit breaker and a master station; the photovoltaic circuit breaker is connected to the photovoltaic inverter, and the non-flexible control module includes:

[0130] The rigid control unit is used to disconnect the photovoltaic circuit breaker from the photovoltaic inverter to trip the photovoltaic inverter, and then report the tripping status of the photovoltaic inverter to the main station through the IoT energy meter at the power generation metering point and the IoT energy meter at the property boundary point in sequence.

[0131] Further functional descriptions of the above modules and units are the same as those in the corresponding embodiments described above, and will not be repeated here.

[0132] In this embodiment, the flexible control device for surplus power grid connection is presented in the form of a functional unit. Here, a unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that execute one or more software or fixed programs, and / or other devices that can provide the above functions.

[0133] This invention also provides a computer device having the above-described features. Figure 5 The flexible control device shown is for feeding surplus electricity into the grid.

[0134] Please see Figure 6 , Figure 6 This is a schematic diagram of the structure of a computer device provided in an optional embodiment of the present invention, such as... Figure 6 As shown, the computer device includes one or more processors 10, memory 20, and interfaces for connecting the components, including high-speed interfaces and low-speed interfaces. The components communicate with each other via different buses and can be mounted on a common motherboard or otherwise installed as needed. The processors can process instructions executed within the computer device, including instructions stored in or on memory to display graphical information of a GUI on external input / output devices (such as display devices coupled to the interfaces). In some alternative implementations, multiple processors and / or multiple buses can be used with multiple memories and multiple memory modules, if desired. Similarly, multiple computer devices can be connected, each providing some of the necessary operations (e.g., as a server array, a group of blade servers, or a multiprocessor system). Figure 6 Take a processor 10 as an example.

[0135] Processor 10 may be a central processing unit, a network processor, or a combination thereof. Processor 10 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The programmable logic device may be a complex programmable logic device (CAMP), a field-programmable gate array (FPGA), a general-purpose array logic (GDA), or any combination thereof.

[0136] The memory 20 stores instructions executable by at least one processor 10 to cause the at least one processor 10 to perform the method shown in the above embodiments.

[0137] The memory 20 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created based on the use of the computer device. Furthermore, the memory 20 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some alternative embodiments, the memory 20 may optionally include memory remotely located relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

[0138] The memory 20 may include volatile memory, such as random access memory; the memory may also include non-volatile memory, such as flash memory, hard disk or solid-state drive; the memory 20 may also include a combination of the above types of memory.

[0139] The computer device also includes an input device 30 and an output device 40. The processor 10, memory 20, input device 30, and output device 40 can be connected via a bus or other means. Figure 6 Taking the example of a connection between China and Israel via a bus.

[0140] Input device 30 can receive input numerical or character information, and generate key signal inputs related to user settings and function control of the computer device, such as a touchscreen, keypad, mouse, trackpad, touchpad, joystick, one or more mouse buttons, trackball, joystick, etc. Output device 40 may include display devices, auxiliary lighting devices (e.g., LEDs), and haptic feedback devices (e.g., vibration motors). The aforementioned display devices include, but are not limited to, liquid crystal displays, light-emitting diodes, displays, and plasma displays. In some alternative embodiments, the display device may be a touchscreen.

[0141] This invention also provides a computer-readable storage medium. The methods described above according to embodiments of the invention can be implemented in hardware or firmware, or implemented as computer code that can be recorded on a storage medium, or implemented as computer code downloaded via a network and originally stored on a remote storage medium or a non-transitory machine-readable storage medium and then stored on a local storage medium. Thus, the methods described herein can be processed by software stored on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. The storage medium can be a magnetic disk, optical disk, read-only memory, random access memory, flash memory, hard disk, or solid-state drive, etc.; further, the storage medium can also include combinations of the above types of memory. It is understood that computers, processors, microprocessor controllers, or programmable hardware include storage components capable of storing or receiving software or computer code, which, when accessed and executed by the computer, processor, or hardware, implements the methods shown in the above embodiments.

[0142] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A flexible regulation method for surplus power internet access, characterized in that, The method is applied to a flexible regulation system, and the flexible regulation system comprises a photovoltaic inverter. The method comprises the following steps: acquiring a property boundary point power and a power generation metering point power; calculating a power generation power difference value based on the property boundary point power and a preset power generation power control parameter; a formula for calculating the power generation power difference value based on the property boundary point power and the preset power generation power control parameter is as follows: ΔE = E0 + E1; wherein ΔE is the power generation power difference value, E0 is the preset power generation power control parameter, and E1 is the property boundary point power; calculating a power generation side real-time power control limit value based on the power generation power difference value and the power generation metering point power; a formula for calculating the power generation side real-time power control limit value based on the power generation power difference value and the power generation metering point power is as follows: E = |E2 + ΔE|; wherein E is the power generation side real-time power control limit value, and E2 is the power generation metering point power; 2. The method of claim 1, wherein, flexibly regulating the power generation power of the photovoltaic inverter based on the power generation side real-time power control limit value. The flexible regulation system further comprises an Internet of Things electric energy meter, and the Internet of Things electric energy meter is installed at the property boundary point and the power generation metering point respectively; the acquiring of the property boundary point power and the power generation metering point power comprises the following steps: collecting the power of the property boundary point Internet of Things electric energy meter as the property boundary point power; 3. The method of claim 1, wherein, collecting the power of the power generation metering point Internet of Things electric energy meter as the power generation metering point power. The flexible regulation system further comprises an Internet of Things electric energy meter, and the Internet of Things electric energy meter is installed at the property boundary point and the power generation metering point respectively; the acquiring of the property boundary point power and the power generation metering point power comprises the following steps: when the power generation power of the photovoltaic inverter is less than or equal to the power generation side real-time power control limit value, regulating the power generation power of the photovoltaic inverter in real time based on the power generation side real-time power control limit value; 4. The method of claim 2, wherein, when the power generation side real-time power control limit value is equal to a preset power threshold value, regulating the power generation power of the photovoltaic inverter in a time period based on the power generation metering point power. The flexible regulation system further comprises a data interaction module, and the data interaction module is connected to the photovoltaic inverter; the method further comprises the following steps: when the power generation power of the photovoltaic power station is greater than the power generation side real-time power control limit value, determining that the flexible regulation fails; 5. The method of claim 4, wherein, when the flexible regulation fails, issuing a regulation command of power generation power reduction or performing rigid regulation on the photovoltaic inverter by the power generation metering point Internet of Things electric energy meter through the data interaction module. The flexible regulation system further comprises a photovoltaic circuit breaker and a master station; the photovoltaic circuit breaker is connected to the photovoltaic inverter; The rigid regulation on the photovoltaic inverter comprises the following steps:

6. A flexible regulation device for surplus power internet, characterized in that, disconnecting the photovoltaic circuit breaker and the photovoltaic inverter to trip the photovoltaic inverter, and sequentially reporting the tripping of the photovoltaic inverter to the master station through the power generation metering point Internet of Things electric energy meter and the property boundary point Internet of Things electric energy meter. The device is applied to a flexible regulation system, and the flexible regulation system comprises a photovoltaic inverter; the device comprises the following: a power acquisition module, configured to acquire a property boundary point power and a power generation metering point power; a difference value calculation module, configured to calculate a power generation power difference value based on the property boundary point power and a preset power generation power control parameter; a formula for calculating the power generation power difference value based on the property boundary point power and the preset power generation power control parameter is as follows: ΔE = E0 + E1; wherein ΔE is the power generation power difference value, E0 is the preset power generation power control parameter, and E1 is the property boundary point power; a limit value calculation module, configured to calculate a power generation side real-time power control limit value based on the power generation power difference value and the power generation metering point power; a formula for calculating the power generation side real-time power control limit value based on the power generation power difference value and the power generation metering point power is as follows: E = |E2 + ΔE|; wherein E is the power generation side real-time power control limit value, and E2 is the power generation metering point power. Wherein, ΔE is the power difference, E0 is the preset power control parameter, E1 is the property boundary point power; The limit value calculation module is configured to calculate the real-time power control limit value of the power generation side based on the power difference and the power generation metering point power. The formula for calculating the real-time power control limit value of the power generation side based on the power difference and the power generation metering point power is as follows: E = |E2 + ΔE|; Wherein, E is the real-time power control limit value of the power generation side, E2 is the power generation metering point power; The flexible control module is configured to perform flexible control on the power generation power of the photovoltaic inverter based on the real-time power control limit value of the power generation side.

7. A computer device, comprising: Comprise: A memory and a processor, which are in communication connection with each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the flexible control method of the residual power on the Internet of any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions, and the computer instructions are used to make the computer execute the flexible control method of the residual power on the Internet of any one of claims 1 to 5.

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