Distributed multi-source power grid control method and system

Abstract

The invention discloses a distributed multi-source power grid control method and system, a distributed multi-source power grid comprises a new energy power generation device, an energy storage device, a charging device and a load device, and the control method comprises the following steps: obtaining a grid-connected point power value of the distributed multi-source power grid; and correspondingly adjusting the output power of the new energy power generation equipment, the charging and discharging power of the energy storage equipment, the load power of the charging equipment and the power of the load equipment according to the comparison results of the grid-connected point power value, the grid-connected point power threshold lower limit and the grid-connected point power threshold upper limit, so as to realize the real-time adjustment of the grid-connected point power value of the distributed multi-source power grid. And the power value of the grid-connected point is always in a safe interval. By realizing multi-scene application and multi-energy interaction of the multi-source power grid system, various types of energy are orderly controlled and fully utilized, the system safety and the compatibility of the multi-source power grid are greatly improved, and the energy utilization efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the field of distributed multi-source power grid control, and in particular to a distributed multi-source power grid control method and system. Background Art

[0002] Under the dual pressure of energy demand and environmental protection, both domestic and foreign countries have turned their attention to the distributed power generation related technology fields of various renewable energy sources. Driven by relevant policies and market benefits, distributed energy has entered a period of rapid development. New energy applications such as photovoltaic power generation, wind power generation, energy storage, and charging equipment have been widely implemented. However, the limitations of distributed energy itself have caused low energy utilization, poor system coordination, poor grid interactivity, and low grid security, which have affected the high-quality development of the distributed energy industry. Summary of the invention

[0003] The purpose of the embodiments of the present invention is to provide a distributed multi-source power grid control method and system, which can realize multi-scenario application and multi-energy interaction of the multi-source power grid system, orderly control and fully utilize various types of energy, greatly improve the system security and compatibility of the multi-source power grid, and improve energy utilization efficiency.

[0004] To solve the above technical problems, a first aspect of an embodiment of the present invention provides a distributed multi-source power grid control method, wherein the distributed multi-source power grid includes: a new energy power generation device, an energy storage device, a charging device and a load device, and the control method includes the following steps:

[0005] Obtaining the power value of the grid connection point of the distributed multi-source power grid;

[0006] When the grid connection point power value is less than or equal to the grid connection point power threshold lower limit, if the output power of the new energy power generation equipment is greater than the sum of the charging equipment load power and the load equipment power, the energy storage device is controlled to charge, and the charging equipment load power and the load equipment power are increased to increase the grid connection point power value of the distributed multi-source power grid;

[0007] When the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the load power is not allowed to increase during the operation period, the energy storage device is controlled to discharge, and the charging device load power and the load device power are reduced to reduce the grid connection point power value of the distributed multi-source power grid;

[0008] When the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the operating period allows the load power to be increased, the energy storage device is controlled to discharge and increase the output power of the new energy power generation equipment, and the charging equipment load power is increased to achieve dynamic capacity expansion of the distributed multi-source power grid.

[0009] Furthermore, the distributed multi-source power grid control method further includes:

[0010] When the grid connection point power value is less than the grid connection point power threshold upper limit and greater than the grid connection point power threshold lower limit, if the real-time value of the total load of the distribution network is higher than the total load average value, the energy storage device is controlled to discharge; if the real-time value of the total load of the distribution network is lower than the total load average value, the energy storage device is controlled to charge.

[0011] Furthermore, the charging equipment is an electric vehicle charging device.

[0012] Furthermore, the new energy power generation equipment includes: a wind power generation device and / or a photovoltaic power generation device.

[0013] Accordingly, a second aspect of an embodiment of the present invention provides a distributed multi-source power grid control system, wherein the distributed multi-source power grid includes: a new energy power generation device, an energy storage device, a charging device, and a load device, and the control system includes:

[0014] A power detection module, which is used to obtain the power value of the grid connection point of the distributed multi-source power grid;

[0015] A first control module, which is used to control the energy storage device to charge and increase the charging device load power and the load device power when the grid connection point power value is less than or equal to the grid connection point power threshold lower limit, such as the output power of the new energy power generation equipment is greater than the sum of the charging device load power and the load device power, so as to improve the grid connection point power value of the distributed multi-source power grid;

[0016] A second control module is used to control the energy storage device to discharge and reduce the load power of the charging device and the load device power to reduce the grid connection point power value of the distributed multi-source power grid when the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the load power is not allowed to increase during the operation period;

[0017] The third control module is used to control the energy storage device to discharge and increase the output power of the new energy power generation equipment, and increase the load power of the charging equipment when the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the operating period allows the load power to be increased, so as to achieve dynamic capacity expansion of the distributed multi-source power grid.

[0018] Furthermore, the distributed multi-source power grid control system further includes:

[0019] The fourth control module is used to control the energy storage device to discharge when the grid connection point power value is less than the grid connection point power threshold upper limit and greater than the grid connection point power threshold lower limit, such as the real-time value of the total load of the distribution network is higher than the total load average value; if the real-time value of the total load of the distribution network is lower than the total load average value, then control the energy storage device to charge.

[0020] Furthermore, the charging equipment is an electric vehicle charging device.

[0021] Furthermore, the new energy power generation equipment includes: a wind power generation device and / or a photovoltaic power generation device.

[0022] Accordingly, a third aspect of an embodiment of the present invention provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the distributed multi-source power grid control method as described above.

[0023] Accordingly, a fourth aspect of an embodiment of the present invention provides a computer-readable storage medium having computer instructions stored thereon, which implement the above-mentioned distributed multi-source power grid control method when executed by a processor.

[0024] The above technical solution of the embodiment of the present invention has the following beneficial technical effects:

[0025] 1. By controlling the charge and discharge of energy storage equipment and adjusting the load power of charging equipment and load equipment, the power value can be increased when the power value at the grid connection point is less than the lower limit, and the power value can be reduced when it is greater than the upper limit and the load power cannot be increased during the operation period, effectively balancing the grid connection point power of the distributed multi-source power grid and stabilizing it within a reasonable range;

[0026] 2. When the output power of the new energy power generation equipment is greater than the sum of the power of the charging equipment and the load equipment, control the charging of the energy storage equipment and increase the load power, make full use of new energy power generation, improve energy utilization efficiency, and reduce dependence on traditional energy;

[0027] 3. When the power value at the grid connection point is greater than the upper limit and the load power is allowed to increase during the operating period, control the discharge of energy storage equipment, increase the output power of new energy power generation equipment and the load power of charging equipment, realize the dynamic capacity expansion of distributed multi-source power grid, and improve the power supply capacity and flexibility of the power grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a flow chart of a distributed multi-source power grid control method provided by an embodiment of the present invention;

[0029] Figure 2is a schematic diagram of a distributed multi-source power grid provided by an embodiment of the present invention;

[0030] Figure 3 It is a block diagram of a distributed multi-source power grid control system module provided by an embodiment of the present invention.

[0031] Reference numerals:

[0032] 1. Power detection module, 2. First control module, 3. Second control module, 4. Third control module, 5. Fourth control module. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0034] The distributed multi-source power grid consists of new energy power generation equipment, energy storage equipment, charging equipment and load equipment. Among them, the new energy power generation equipment provides green energy for the power grid; the energy storage equipment can be charged and discharged according to the power situation of the grid connection point, playing the role of balancing power; the charging equipment meets the charging needs of various electric equipment; and the load equipment is responsible for providing power support for various power usage scenarios. This combination of distributed multi-source power grids can achieve efficient utilization and flexible allocation of energy, and improve the stability and reliability of the power grid.

[0035] Please refer to Figure 1 and Figure 2 A first aspect of an embodiment of the present invention provides a distributed multi-source power grid control method, wherein the distributed multi-source power grid includes: a new energy power generation device, an energy storage device, a charging device, and a load device, and the control method includes the following steps:

[0036] Step S100, obtaining a grid connection point power value of a distributed multi-source power grid.

[0037] By installing appropriate power measurement devices at the grid connection point of the distributed multi-source power grid, such as high-precision smart meters or professional power sensors, the power parameters at the grid connection point can be accurately measured.

[0038] Step S200, when the grid connection point power value is less than or equal to the grid connection point power threshold lower limit, if the output power of the new energy power generation equipment is greater than the sum of the charging equipment load power and the load equipment power, the energy storage equipment is controlled to charge, and the charging equipment load power and the load equipment power are increased to increase the grid connection point power value of the distributed multi-source power grid.

[0039] When the grid connection point power value of the distributed multi-source power grid is less than or equal to the grid connection point power threshold lower limit, the following series of operations can be performed to increase the grid connection point power value: first, determine whether the output power of the new energy power generation equipment is greater than the sum of the load power of the charging equipment and the load equipment power. If this condition is met, it means that there is a certain margin of new energy power generation at this time; secondly, control the energy storage equipment to charge. During the charging process, the energy storage equipment can store excess electric energy to prepare for the subsequent possible power shortage; thirdly, increase the load power of the charging equipment and the load power of the load equipment. For the charging equipment, the charging speed can be increased or the number of devices being charged can be increased, thereby consuming more electric energy. For the load equipment, its load power can be increased by adjusting the operating status of the equipment, such as increasing the power output of the equipment.

[0040] Through the above measures, the power value of the grid connection point of the distributed multi-source power grid can be effectively improved, so that it can be restored to a reasonable power range as soon as possible, ensuring the stable operation and reliable power supply of the power grid.

[0041] Step S300, when the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the load power is not allowed to increase during the operation period, the energy storage device is controlled to discharge, and the charging device load power and the load device power are reduced to reduce the grid connection point power value of the distributed multi-source power grid.

[0042] When the power value of the grid connection point is greater than or equal to the upper threshold of the grid connection point power and the load power is not allowed to increase during the operation period, the distributed multi-source power grid will take the following measures to reduce the power value of the grid connection point: On the one hand, control the energy storage device to discharge, and the energy storage device will release the previously stored electric energy at this time to feed back electricity to the grid, thereby reducing the power inflow at the grid connection point, which can effectively reduce the power value of the grid connection point and avoid the adverse effects of excessive power on the grid. On the other hand, reduce the load power of the charging device and the load device power. For the charging device, you can reduce the charging speed, suspend the operation of some charging devices, or adjust the charging strategy to reduce energy consumption. For the load device, you can reduce the load power by reducing the operating power of the device, shutting down some non-essential devices, etc.

[0043] By reducing the power demand of charging equipment and load equipment, the power value of the grid connection point of the distributed multi-source power grid can be further reduced, ensuring that the power grid operates stably within the upper limit of the power threshold, thereby ensuring the safety and reliability of the power grid.

[0044] Step S400: When the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the operating period allows the load power to be increased, the energy storage device is controlled to discharge and the output power of the new energy power generation equipment is increased, and the load power of the charging device is increased to achieve dynamic capacity expansion of the distributed multi-source power grid.

[0045] When the distributed multi-source power grid is in a state where the power value of the grid connection point is greater than or equal to the upper threshold of the grid connection point power and the load power is allowed to be increased during the operation period, that is, when the distributed multi-source power grid is in the safe threshold interval of the grid connection point power value, the following operations can be performed to achieve dynamic capacity increase: First, control the energy storage device to discharge, and the energy storage device releases the stored electric energy to the grid. This part of the additional power supply can help alleviate the pressure of excessive power at the grid connection point and reduce the power value of the grid connection point; secondly, increase the output power of new energy power generation equipment. By adjusting the operating parameters of new energy power generation equipment, such as increasing the speed of wind turbines and adjusting the angle of solar panels, various types of new energy power generation equipment can increase the power generation as much as possible within a safe range. Finally, increase the load power of the charging equipment. When the load power is allowed to be increased during the operation period, the charging speed of the charging equipment can be increased, the number of devices being charged can be increased, or some charging equipment that was originally in standby state can be started. The above measures can make full use of the increased output power of new energy power generation equipment and the electric energy released by the energy storage equipment to improve the power utilization rate of the entire power grid.

[0046] By controlling the discharge of energy storage devices, increasing the output power of new energy power generation equipment, and increasing the synergistic effect of charging equipment load power, the distributed multi-source power grid can achieve dynamic capacity expansion, that is, without large-scale infrastructure construction, it can flexibly respond to power changes, improve the power supply capacity and adaptability of the power grid, and meet the growing electricity demand.

[0047] In a specific implementation of the embodiment of the present invention, the power of the grid connection point is expressed as:

[0048] P G =(P EV +P EL )-(P PV +P EC );

[0049] Among them, the power of the grid connection point is P G , the power of new energy generation is P PV , energy storage charging and discharging power: P EC , Electric vehicle charging power: P EV , the load equipment power is P EL ,

[0050] After further refinement, the power expression formula of the grid connection point is:

[0051]

[0052] Among them, the total new energy power generation capacity is: System energy storage charging and discharging power: System electric vehicle charging power: System energy storage charging and discharging power:

[0053] When P 下限值 <P G <P 上限值 The power grid is in normal operation.

[0054] When P G ≤P 下限值 , then adjust it as follows:

[0055] 1. Increase the load: Increase P EV +P EL ;

[0056] 2. Energy storage charging:

[0057] 3. Reduce renewable energy power generation:

[0058] When P 上限值 ≤P G If the load cannot be increased, adjust it as follows:

[0059] 1. Reduce the load: reduce P EV +P EL

[0060] 2. Increase renewable energy power generation:

[0061] 3. Energy storage and discharge:

[0062] If the load is allowed to increase, adjust it as follows:

[0063] 4. Energy storage and discharge:

[0064] 5. Increase the load: Increase P EV +P EL .

[0065] Furthermore, the distributed multi-source power grid control method further includes:

[0066] Step S500, when the grid connection point power value is less than the grid connection point power threshold upper limit and greater than the grid connection point power threshold lower limit, if the real-time value of the total load of the distribution network is higher than the total load average value, the energy storage device is controlled to discharge; if the real-time value of the total load of the distribution network is lower than the total load average value, the energy storage device is controlled to charge.

[0067] When the power value of the grid connection point of the distributed multi-source power grid is between the upper and lower limits of the grid connection point power threshold, the charging and discharging of the energy storage device will be controlled according to the comparison result of the real-time value of the total load of the distribution network and the average value of the total load. If the real-time value of the total load of the distribution network is higher than the average value of the total load, it means that the load of the grid is large at this time, and there may be a risk of insufficient power. In this case, the energy storage device is controlled to discharge and release the stored electric energy to the grid to meet the load demand and maintain the stable operation of the grid.

[0068] On the contrary, if the real-time value of the total load of the distribution network is lower than the average value of the total load, it means that the load of the power grid is relatively small, and there is excess power that can be stored. Therefore, the energy storage device is controlled to charge and the excess power is stored for use during peak loads, thereby improving energy utilization efficiency and the reliability of the power grid.

[0069] In this way, the state of the energy storage equipment can be dynamically adjusted according to the actual load conditions of the power grid, so as to achieve the rational distribution and utilization of electric energy and optimize the operation of the distributed multi-source power grid.

[0070] In a specific implementation of the embodiment of the present invention, the charging device is an electric vehicle charging device.

[0071] If the charging equipment is an electric vehicle charging device, then the electric vehicle charging device will play an important role in the entire distributed multi-source power grid. On the one hand, when the grid connection point power value is less than or equal to the grid connection point power threshold lower limit, if the output power of the new energy power generation equipment is greater than the sum of the load power of the electric vehicle charging device and the power of other load equipment, the energy storage device can be controlled to charge, and the load power of the electric vehicle charging device can be increased at the same time. This not only helps to improve the grid connection point power value of the distributed multi-source power grid, but also meets the charging needs of more electric vehicles and promotes the popularization and development of electric vehicles. On the other hand, when the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the load power is not allowed to increase during the operation period, it is necessary to reduce the load power of the electric vehicle charging device. The power demand of the electric vehicle charging on the power grid can be reduced by adjusting the charging speed, suspending the operation of some charging devices, etc., so as to reduce the grid connection point power value of the distributed multi-source power grid and ensure the stable operation of the power grid.

[0072] When the power value of the grid connection point is greater than or equal to the upper limit of the grid connection point power threshold and the load power is allowed to be increased during the operating period, the load power of the electric vehicle charging device can be increased, and the discharge of energy storage equipment and the increased output power of new energy power generation equipment can be fully utilized to achieve dynamic capacity expansion of the distributed multi-source power grid and improve the power supply capacity and flexibility of the power grid.

[0073] In addition, when the power value of the grid connection point is between the upper and lower limits of the power threshold, and the real-time value of the total load of the distribution network is higher than the average value of the total load, controlling the discharge of the energy storage device can provide more electrical energy for the electric vehicle charging device to meet the charging needs of the electric vehicle; when the real-time value of the total load of the distribution network is lower than the average value of the total load, controlling the charging of the energy storage device can store excess electrical energy for use during the peak charging period of electric vehicles.

[0074] Specifically, the new energy power generation equipment includes: wind power generation devices and / or photovoltaic power generation devices.

[0075] The above technical solution can realize multi-scenario application and multi-energy interaction of multi-source power grid system, orderly control and full utilization of various energy sources in the system, greatly improve the system security characteristics and multi-source compatibility, and improve the energy utilization efficiency of the system; enable the distributed energy system to use the energy pool as the control model, and be able to access various types of new energy equipment, expand the compatibility characteristics and rapid engineering application of various new energy power generation equipment, energy storage equipment, new energy load equipment, etc. in the system; it can optimize energy regulation according to the characteristics of the connected new energy equipment, absorb new energy through multi-layer strategies, improve the utilization rate of new energy, and reduce the operating cost of the system; using the energy pool as the control subject, the simplified control process has higher control real-time characteristics, can improve the response speed of various control strategies of the system, quickly respond to changes in distributed energy systems and grid interactions, and improve the safety of grids and systems; it can support different types of new energy equipment for system construction, and can freely combine the "source-grid-load-storage" system to meet the application requirements of various scenarios such as "photovoltaic storage", "wind-photovoltaic storage", "photovoltaic storage and charging", and meet the multi-scenario needs and complex environment applications of distributed energy development.

[0076] Accordingly, please refer to Figure 3 A second aspect of an embodiment of the present invention provides a distributed multi-source power grid control system, wherein the distributed multi-source power grid includes: a new energy power generation device, an energy storage device, a charging device and a load device, and the control system includes:

[0077] A power detection module 1 is used to obtain the power value of the grid connection point of the distributed multi-source power grid;

[0078] The first control module 2 is used to control the energy storage device to charge and increase the charging device load power and the load device power when the grid connection point power value is less than or equal to the grid connection point power threshold lower limit, such as the output power of the new energy power generation equipment is greater than the sum of the charging device load power and the load device power, so as to improve the grid connection point power value of the distributed multi-source power grid;

[0079] The second control module 3 is used to control the energy storage device to discharge and reduce the load power of the charging device and the load device power to reduce the grid connection point power value of the distributed multi-source power grid when the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the load power is not allowed to increase during the operation period;

[0080] The third control module 4 is used to control the energy storage device to discharge and increase the output power of the new energy power generation equipment and the load power of the charging equipment when the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the operating period allows the load power to be increased, so as to realize the dynamic capacity expansion of the distributed multi-source power grid.

[0081] Furthermore, the distributed multi-source power grid control system further includes:

[0082] The fourth control module 5 is used to control the energy storage device to discharge when the grid connection point power value is less than the grid connection point power threshold upper limit and greater than the grid connection point power threshold lower limit, such as the real-time value of the total load of the distribution network is higher than the total load average value; if the real-time value of the total load of the distribution network is lower than the total load average value, then control the energy storage device to charge.

[0083] Furthermore, the charging equipment is an electric vehicle charging device.

[0084] Furthermore, the new energy power generation equipment includes: a wind power generation device and / or a photovoltaic power generation device.

[0085] Accordingly, a third aspect of an embodiment of the present invention provides an electronic device, comprising: at least one processor; and a memory connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the distributed multi-source power grid control method as described above.

[0086] Accordingly, a fourth aspect of an embodiment of the present invention provides a computer-readable storage medium having computer instructions stored thereon, which implement the above-mentioned distributed multi-source power grid control method when executed by a processor.

[0087] The embodiment of the present invention aims to protect a distributed multi-source power grid control method, the distributed multi-source power grid includes: new energy power generation equipment, energy storage equipment, charging equipment and load equipment, and the control method includes the following steps: obtaining the grid connection point power value of the distributed multi-source power grid; when the grid connection point power value is less than or equal to the lower limit of the grid connection point power threshold, if the output power of the new energy power generation equipment is greater than the sum of the load power of the charging equipment and the load equipment power, then control the energy storage equipment to charge, and increase the load power of the charging equipment and the load equipment power to improve the grid connection point power value of the distributed multi-source power grid; when the grid connection point power value is greater than or equal to the upper limit of the grid connection point power threshold and the load power is not allowed to be increased during the operation period, then control the energy storage equipment to discharge, and reduce the load power of the charging equipment and the load equipment power to reduce the grid connection point power value of the distributed multi-source power grid; when the grid connection point power value is greater than or equal to the upper limit of the grid connection point power threshold and the load power is allowed to be increased during the operation period, then control the energy storage equipment to discharge and increase the output power of the new energy power generation equipment, and increase the load power of the charging equipment, so as to achieve dynamic capacity expansion of the distributed multi-source power grid. The above technical scheme has the following effects:

[0088] 1. By controlling the charge and discharge of energy storage equipment and adjusting the load power of charging equipment and load equipment, the power value can be increased when the power value at the grid connection point is less than the lower limit, and the power value can be reduced when it is greater than the upper limit and the load power cannot be increased during the operation period, effectively balancing the grid connection point power of the distributed multi-source power grid and stabilizing it within a reasonable range;

[0089] 2. When the output power of the new energy power generation equipment is greater than the sum of the power of the charging equipment and the load equipment, control the charging of the energy storage equipment and increase the load power, make full use of new energy power generation, improve energy utilization efficiency, and reduce dependence on traditional energy;

[0090] 3. When the power value at the grid connection point is greater than the upper limit and the load power is allowed to increase during the operating period, control the discharge of energy storage equipment, increase the output power of new energy power generation equipment and the load power of charging equipment, realize the dynamic capacity expansion of distributed multi-source power grid, and improve the power supply capacity and flexibility of the power grid.

[0091] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that include computer-usable program code.

[0092] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0093] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0094] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A distributed multi-source power grid control method, characterized in that: The distributed multi-source power grid includes: new energy power generation equipment, energy storage equipment, charging equipment and load equipment. The control method includes the following steps: Obtaining the power value of the grid connection point of the distributed multi-source power grid; When the grid connection point power value is less than or equal to the grid connection point power threshold lower limit, if the output power of the new energy power generation equipment is greater than the sum of the charging equipment load power and the load equipment power, the energy storage device is controlled to charge, and the charging equipment load power and the load equipment power are increased to increase the grid connection point power value of the distributed multi-source power grid; When the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the load power is not allowed to increase during the operation period, the energy storage device is controlled to discharge, and the charging device load power and the load device power are reduced to reduce the grid connection point power value of the distributed multi-source power grid; When the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the operating period allows the load power to be increased, the energy storage device is controlled to discharge and increase the output power of the new energy power generation equipment, and the charging equipment load power is increased to achieve dynamic capacity expansion of the distributed multi-source power grid.

2. The distributed multi-source power grid control method according to claim 1, characterized in that: Also includes: When the grid connection point power value is less than the grid connection point power threshold upper limit and greater than the grid connection point power threshold lower limit, if the real-time value of the total load of the distribution network is higher than the total load average value, the energy storage device is controlled to discharge; if the real-time value of the total load of the distribution network is lower than the total load average value, the energy storage device is controlled to charge.

3. The distributed multi-source power grid control method according to claim 1 or 2, characterized in that: The charging equipment is an electric vehicle charging device.

4. The distributed multi-source power grid control method according to claim 1 or 2, characterized in that: The new energy power generation equipment includes: a wind power generation device and / or a photovoltaic power generation device.

5. A distributed multi-source power grid control system, characterized in that: The distributed multi-source power grid includes: new energy power generation equipment, energy storage equipment, charging equipment and load equipment, and the control system includes: A power detection module, which is used to obtain the power value of the grid connection point of the distributed multi-source power grid; A first control module, which is used to control the energy storage device to charge and increase the charging device load power and the load device power when the grid connection point power value is less than or equal to the grid connection point power threshold lower limit, such as the output power of the new energy power generation equipment is greater than the sum of the charging device load power and the load device power, so as to improve the grid connection point power value of the distributed multi-source power grid; A second control module is used to control the energy storage device to discharge and reduce the load power of the charging device and the load device power to reduce the grid connection point power value of the distributed multi-source power grid when the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the load power is not allowed to increase during the operation period; The third control module is used to control the energy storage device to discharge and increase the output power of the new energy power generation equipment, and increase the load power of the charging equipment when the grid connection point power value is greater than or equal to the grid connection point power threshold upper limit and the operating period allows the load power to be increased, so as to achieve dynamic capacity expansion of the distributed multi-source power grid.

6. The distributed multi-source power grid control system according to claim 5, characterized in that: Also includes: The fourth control module is used to control the energy storage device to discharge when the grid connection point power value is less than the grid connection point power threshold upper limit and greater than the grid connection point power threshold lower limit, such as the real-time value of the total load of the distribution network is higher than the total load average value; if the real-time value of the total load of the distribution network is lower than the total load average value, then control the energy storage device to charge.

7. The distributed multi-source power grid control system according to claim 5 or 6, characterized in that: The charging equipment is an electric vehicle charging device.

8. The distributed multi-source power grid control system according to claim 5 or 6, characterized in that: The new energy power generation equipment includes: a wind power generation device and / or a photovoltaic power generation device.

9. An electronic device, characterized in that: include: at least one processor; And a memory connected to the at least one processor; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor executes the distributed multi-source power grid control method as described in any one of claims 1-4.

10. A computer-readable storage medium, characterized in that: Computer instructions are stored thereon, and when the instructions are executed by a processor, the distributed multi-source power grid control method described in any one of claims 1-4 is implemented.

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