Micro-grid system operation control method, device, control equipment and system

Abstract

The application provides a micro-grid system operation control method, device, control equipment and system, and relates to the technical field of micro-grid control. The micro-grid system operation control method comprises the following steps: after the power parameter of a load system in a micro-grid system is acquired, a plurality of third power intervals of the load system are determined according to a first power interval of a power generation system in the micro-grid system and a second power interval of an energy storage system in the micro-grid system; a target power interval in which an active power parameter of the load system is located is determined from the plurality of third power intervals, and a power generation power setting parameter and an energy storage power setting parameter corresponding to the target power interval; finally, the state of the power generation system and the state of the energy storage system are adjusted, so that the active power parameter of the adjusted power generation system is the power generation power setting parameter, and the active power parameter of the adjusted energy storage system is the energy storage power setting parameter. Therefore, the operation efficiency of the micro-grid system can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of microgrid control technology, and more specifically, to a method, apparatus, control equipment, and system for operating and controlling a microgrid system. Background Technology

[0002] With the vigorous development of microgrids, microgrid systems have emerged, consisting of power generation systems, energy storage systems, and load systems.

[0003] Power generation systems and energy storage systems each have their own advantages and disadvantages. However, since the optimal efficiency of power generation systems and energy storage systems lies in different power ranges, different characteristic loads will cause different overall power generation efficiencies. If the two power supply systems are not properly selected and / or controlled, the operating efficiency of the entire microgrid system will not be optimal, resulting in more fuel consumption and poor economic benefits. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a method, apparatus, control equipment, and system for operating and controlling a microgrid system, so as to achieve more precise control of the microgrid system.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows: In a first aspect, embodiments of this application provide an operation control method for a microgrid system, the method comprising: Obtain the power parameters of the load system in the microgrid system, wherein the power parameters of the load system include: the active power parameters of the load system; Based on the first power range of the power generation system in the microgrid system and the second power range of the energy storage system in the microgrid system, a plurality of third power ranges of the load system are determined. From the plurality of third power ranges, determine the target power range in which the active power parameters of the load system are located; Determine the power generation setting parameters and / or energy storage setting parameters corresponding to the target power range; Adjust the state of the power generation system and / or the state of the energy storage system so that the active power parameters of the power generation system after adjustment are the power generation setting parameters, and the active power parameters of the energy storage system after adjustment are the energy storage setting parameters.

[0006] Optionally, the first power range includes: a light-load range [P] m1 P m2 ), optimal power generation efficiency range [P] m2 P m3 ] and high load range (P m3 P mnThe second power range includes: the optimal energy storage efficiency range [P] c1 P c2 ].

[0007] Optionally, the third power range includes one or more of the following: first range, second range, third range, fourth range, fifth range, sixth range, seventh range, and eighth range; the determination of multiple third power ranges of the load system based on the first power range of the power generation system in the microgrid system and the second power range of the energy storage system in the microgrid system includes: According to the high load range (P) m3 P mn ] and the rated power P of the energy storage system cn Determine the first interval (P) m3 +P c2 P mn +P cn ]; According to the optimal power generation efficiency range [P] m2 P m3 ] and the optimal energy storage efficiency range [P c1 P c2 ], determine the second interval [P m2 +P c1 0.5 (P) m2 +P c1 +P m3 +P c2 )] and the third interval (0.5 (P) m2 +P c1 +P m3 +P c2 ), P m3 +P c2 ]; According to the high load range (P) m3 P mn The optimal power generation efficiency range [P] m2 P m3 ] and the optimal energy storage efficiency range [P c1 P c2 ], determine the fourth interval (P mn ,P m2 +P c1 ); According to the high load range (P) m3 P mn ], determine the fifth interval (P) m3 P mn ]; According to the optimal power generation efficiency range [P] m2 Pm3 ], determine the sixth interval [P m2 P m3 ]; According to the optimal power generation efficiency range [P] m2 P m3 The optimal energy storage efficiency range [P] c1 P c2 ], determine the seventh interval [P c1 P m2 ); According to the optimal energy storage efficiency range [P] c1 P c2 ], determine the eighth interval [0, P c1 ).

[0008] Optionally, determining the power generation setting parameters and energy storage setting parameters corresponding to the target power range includes: If the target power range is the first range, half of the active power parameter of the load system is rounded up to obtain the power generation setting parameter; The energy storage power setting parameter is determined based on the difference between the active power parameter of the load system and the power generation setting parameter.

[0009] Optionally, determining the power generation setting parameters and energy storage setting parameters corresponding to the target power range includes: If the target power range is the second range, the fourth range, the fifth range, and the eighth range, then the optimal power generation efficiency range [P] is determined. m2 P m3 The lower limit of ] is the power generation setting parameter; The energy storage power setting parameter is determined based on the difference between the active power parameter of the load system and the power generation setting parameter.

[0010] Optionally, determining the power generation setting parameters and energy storage setting parameters corresponding to the target power range includes: If the target power range is the third range, then the optimal power generation efficiency range [P] is determined. m2 P m3 The upper limit of ] is the power generation setting parameter; The energy storage power setting parameter is determined based on the difference between the active power parameter of the load system and the power generation setting parameter.

[0011] Optionally, determining the power generation setting parameters and energy storage setting parameters corresponding to the target power range includes: If the target power range is the sixth range, then the active power parameter of the load system is determined to be the power generation setting parameter, and the energy storage power setting parameter is determined to be zero; or, If the target power range is the seventh range, the power generation setting parameter is determined to be zero, and the active power parameter of the load system is determined to be the energy storage power setting parameter.

[0012] Optionally, the power parameters of the load system further include: the power factor of the load system; the method further includes: The detected reactive power parameters of the load system are determined based on the power factor and active power parameters of the load system. Based on the detected reactive power parameters and the target reactive power parameters of the load system, the states of the power generation system and the energy storage system are adjusted so that the power factor of the power generation system after adjustment is within a preset power factor range.

[0013] Optionally, the method further includes: Determine the load type of the load system; The microgrid system is operated and controlled according to the control strategy corresponding to the load type.

[0014] Secondly, embodiments of this application also provide an operation control device for a microgrid system, comprising: The acquisition module is used to acquire the power parameters of the load system in the microgrid system, wherein the power parameters of the load system include: the active power parameters of the load system; The interval determination module is used to determine multiple third power intervals of the load system based on the first power interval of the power generation system in the microgrid system and the second power interval of the energy storage system in the microgrid system. The target range determination module is used to determine the target power range in which the active power parameters of the load system are located from the plurality of third power ranges; The parameter determination module is used to determine the power generation setting parameters and energy storage power setting parameters corresponding to the target power range; An adjustment module is used to adjust the state of the power generation system and the state of the energy storage system, so that the active power parameters of the power generation system after adjustment are the power generation setting parameters, and the active power parameters of the energy storage system after adjustment are the energy storage setting parameters.

[0015] Thirdly, embodiments of this application also provide a control device, including: a processor, a storage medium, and a bus. The storage medium stores program instructions executable by the processor. When the electronic device is running, the processor communicates with the storage medium via the bus, and the processor executes the program instructions to perform the steps of the operation control method for the microgrid system as described in any of the first aspects.

[0016] Fourthly, embodiments of this application also provide a microgrid control system, which includes: a power generation system, an energy storage system, a load system, and a control system; The control system is connected to the power generation system, the energy storage system, and the load system respectively to execute the steps of the operation control method for the microgrid system as described in any of the first aspects.

[0017] The beneficial effects of this application are as follows: This application provides an operation control method for a microgrid system. After obtaining the power parameters of the load system in the microgrid system, multiple third power ranges of the load system are determined based on the first power range of the generation system and the second power range of the energy storage system in the microgrid system. From these multiple third power ranges, the target power range in which the active power parameters of the load system are located, as well as the corresponding generation power setting parameters and energy storage power setting parameters, are determined. Finally, the states of the generation system and the energy storage system are adjusted so that the adjusted active power parameters of the generation system are the generation power setting parameters, and the adjusted active power parameters of the energy storage system are the energy storage power setting parameters. Thus, this application, by real-time monitoring and collecting the power parameters of the load system, determines the target power range in which the active power parameters of the load system are located, and adjusts the generation system and the energy storage system according to the corresponding generation power setting parameters and energy storage power setting parameters, so that the generation system and the energy storage system operate in their respective most efficient ranges as much as possible. Throughout the control process, the efficiency of both the power generation system and the energy storage system is taken into consideration. The configuration of the power generation system and the energy storage system in the microgrid system is optimized, thereby effectively improving the operating efficiency of the microgrid system, increasing economic benefits, and reducing environmental pollution problems that may be caused by the power generation system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1A schematic diagram of a microgrid control system provided in an embodiment of this application; Figure 2 A flowchart illustrating an operation control method for a microgrid system provided in one embodiment of this application; Figure 3 A schematic diagram of a microgrid system is provided as another embodiment of this application; Figure 4 A flowchart of an operation control method for a microgrid system provided in another embodiment of this application; Figure 5 An embodiment of this application provides a power generation system operating efficiency and power curve diagram; Figure 6 An energy storage system operating efficiency and power curve is provided as an embodiment of this application; Figure 7 A flowchart of an operation control method for a microgrid system provided in another embodiment of this application; Figure 8 A flowchart of an operation control method for a microgrid system provided in another embodiment of this application; Figure 9 A flowchart of a microgrid system operation control method provided in a second embodiment of this application; Figure 10 A flowchart of a microgrid system operation control method provided in three embodiments of this application; Figure 11 A schematic diagram of an operation control device for a microgrid system provided in an embodiment of this application; Figure 12 This is a schematic diagram of a control device provided in an embodiment of this application. Detailed Implementation

[0020] 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 some embodiments of the present invention, but not all embodiments.

[0021] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one feature. In the description of this invention, "a plurality of" means at least two, such as two or three, unless otherwise expressly specified. The terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0022] With the rapid development of microgrids, microgrid systems have emerged, consisting of power generation systems, energy storage systems, and load systems. Power generation and energy storage systems each have their own advantages and disadvantages. However, because the optimal efficiency of power generation and energy storage systems lies in different power ranges, different characteristic loads will cause variations in overall power generation efficiency. If the two power supply systems (i.e., power generation and energy storage systems) are not properly selected and / or controlled, the overall microgrid system's operating efficiency will be difficult to achieve optimal performance. This may result in greater fuel consumption and a failure to achieve good economic benefits.

[0023] Furthermore, in order to improve the grid operation efficiency of diesel generators and energy storage systems, only the power generation capacity of diesel generators is considered, without recognizing the role of the economic power range of energy storage systems in the entire microgrid system.

[0024] To address the existing problems, this application provides various possible implementation methods to achieve more precise control of microgrid systems. The following explanations, in conjunction with the accompanying drawings, use multiple examples to illustrate these methods.

[0025] First, the microgrid system of this application will be described. Figure 1 A schematic diagram of a microgrid control system provided in one embodiment of this application is shown below. Figure 1 As shown, the microgrid control system includes: a control system 10, a power generation system 20, an energy storage system 30, and a load system 40; wherein, as... Figure 1 As shown by the solid lines, the power generation system 20, energy storage system 30, and load system 40 are electrically connected in pairs to achieve power transfer; as shown by the solid lines. Figure 1As shown by the dashed lines, the control system is connected to the power generation system 20, energy storage system 30, and load system 40 to obtain their operating status parameters or to issue control commands. The above is merely an illustrative example; in actual implementation, the microgrid system may include more or fewer components, and this application does not limit this.

[0026] The following is a detailed introduction to each component of a microgrid system: The control system 10 is an electronic device that runs the operation control method of the microgrid system of this application. The electronic device may be a terminal device or a server, etc., and this application does not limit it.

[0027] The power generation system 20 is a system of mechanical equipment that converts other forms of energy into electrical energy. The power generation system can be any one or any combination of several systems such as diesel power generation system, photovoltaic power generation system, and wind power generation system. This application does not limit this.

[0028] The energy storage system 30 is a system that stores energy through a medium or device and releases it when needed. The energy storage can be achieved, for example, through a battery or battery pack, which is not limited in this application.

[0029] The load system 40 is an electrical system, that is, a consumer of electrical energy. The electricity it consumes can come from the power generation system 20 or the energy storage system 30. This application does not limit the form of electricity consumption or the electrical equipment of the load system.

[0030] Based on the above-mentioned microgrid system, the operation control method of the microgrid system of this application will be described. The operation control method of the microgrid system can be implemented by the above-mentioned control system 10. Figure 2 A flowchart of an operation control method for a microgrid system provided in one embodiment of this application is shown below. Figure 2 As shown, the method includes: Step 201: Obtain the power parameters of the load system in the microgrid system. The power parameters of the load system include the active power parameters of the load system.

[0031] Referring to the microgrid system described above, the control system can acquire the power parameters of the load system in the microgrid system in real time through control connections.

[0032] Similarly, the control system can also collect power parameters of the power generation system and energy storage system in real time through control connections, thereby determining the results of the microgrid system operation control in this application. Furthermore, depending on the specific application scenario, the power parameters can be reactive power Q, power factor, etc., in addition to active power parameter P; this application does not limit this.

[0033] In one specific implementation method Figure 3 A schematic diagram of a microgrid system is provided for another embodiment of this application, as shown below. Figure 3 As shown, the power generation system can be, for example, a diesel generator, and the energy storage system can include two parts: a battery system (energy storage unit) and an energy storage converter (used to convert the DC power output from the battery system into AC power for output to the load system, or to convert the AC power generated by the power generation system into DC power to charge the battery system). Each of the power generation system, load system, and energy storage system has a sampling unit at its port (this unit can be embedded within the system or additionally installed on the system output side (or the input / output side of the energy storage system; this application does not limit this). The sampling unit can acquire the power parameters of the corresponding system, so that the control system can obtain the power parameters through the sampling unit.

[0034] Step 202: Based on the first power range of the power generation system in the microgrid system and the second power range of the energy storage system in the microgrid system, determine multiple third power ranges of the load system.

[0035] It should be noted that, based on the power generation system's operating efficiency and power curve, a first power range for the power generation system can be determined. It should also be noted that this application does not limit the number of first power ranges; each first power range reflects the consistent impact of power on the power generation system's operating efficiency within that range. Furthermore, based on the energy storage system's operating efficiency and power curve, a second power range for the energy storage system can be determined. It should also be noted that this application does not limit the number of second power ranges; each second power range reflects the consistent impact of power on the energy storage system's operating efficiency within that range.

[0036] Based on the first power range and the second power range, the load system is divided into multiple third power ranges. Each third power range reflects that the load system has similar operating characteristics within the range (that is, within each third power range, the power of the power generation system and / or energy storage system can be adjusted by referring to similar adjustment methods. Therefore, each third power range can be set with corresponding power generation setting parameters and energy storage setting parameters, which is not limited in this application).

[0037] Step 203: Determine the target power range in which the active power parameters of the load system are located from multiple third power ranges.

[0038] Based on the active power of the load system and the range of the multiple third power intervals obtained in step 202, the power interval in which the active power of the load system is located can be determined. Since there is no overlap between the multiple third power intervals in this application, a target power interval can be uniquely determined from the multiple third power intervals based on the active power of the load system.

[0039] Step 204: Determine the power generation setting parameters and / or energy storage setting parameters corresponding to the target power range.

[0040] As can be seen from step 203, each third power range has corresponding power generation setting parameters and energy storage setting parameters. Therefore, after determining the target power range, the power generation setting parameters and energy storage setting parameters corresponding to the target power range can be determined.

[0041] Step 205: Adjust the state of the power generation system and / or the energy storage system so that the active power parameters of the adjusted power generation system are the power generation setting parameters, and the active power parameters of the adjusted energy storage system are the energy storage power setting parameters.

[0042] Based on the power generation setting parameters and energy storage setting parameters corresponding to the determined target power range, the states of the power generation system and the energy storage system are adjusted so that the active power parameters of the power generation system and the energy storage system are the same as the power generation setting parameters after adjustment. This application does not limit the specific methods for adjusting the states of the power generation system and the energy storage system; users can set them according to the actual system equipment.

[0043] In summary, this application provides an operation control method for a microgrid system. After acquiring the power parameters of the load system in the microgrid, multiple third power ranges of the load system are determined based on a first power range of the generation system and a second power range of the energy storage system. From these third power ranges, a target power range is determined for the active power parameters of the load system, along with corresponding generation power setting parameters and energy storage power setting parameters. Finally, the states of the generation system and the energy storage system are adjusted so that the adjusted active power parameters of the generation system and the energy storage system become the corresponding generation power setting parameters. Therefore, this application, by real-time monitoring and acquisition of the load system's power parameters, determines the target power range for the load system's active power parameters and adjusts the generation and energy storage systems according to the corresponding generation and energy storage power setting parameters, ensuring that the generation and energy storage systems operate within their respective most efficient ranges. Throughout the control process, the efficiency of both the power generation system and the energy storage system is taken into consideration. The configuration of the power generation system and the energy storage system in the microgrid system is optimized, thereby effectively improving the operating efficiency of the microgrid system, increasing economic benefits, and reducing environmental pollution problems that may be caused by the power generation system.

[0044] Optionally, in the above Figure 2 Based on this, this application also provides a possible implementation of the operation control method for a microgrid system. Figure 4 A flowchart illustrating an operation control method for a microgrid system, as provided in another embodiment of this application; Figure 4 As shown, before obtaining the electrical parameters of the load system in the microgrid system, the method further includes: Step 401: Obtain the voltage of the energy storage unit in the energy storage system.

[0045] It should be noted that the energy storage unit in the energy storage system is the energy storage unit in the energy storage system, which can be, for example, a battery or a battery pack. This application does not limit the specific form of the energy storage unit.

[0046] Since energy storage systems are energy input and output systems, before energy output (i.e., before supplying power to the load system), it is necessary to determine whether the energy storage unit meets the energy output requirements, or whether the electrical energy parameters output by the current energy storage unit meet the needs of the load system.

[0047] In one possible implementation, the voltage of the energy storage unit can be used to determine whether the energy storage system is functioning properly.

[0048] Obtain the electrical parameters of the load system in the microgrid system, including: Step 402: If the voltage of the energy storage unit is greater than or equal to the preset voltage protection value, then obtain the electrical parameters of the load system.

[0049] If the voltage of the energy storage unit is greater than or equal to the preset voltage protection value, it means that the energy stored in the energy storage unit in the energy storage system is sufficient and can be normally output to the load system. Therefore, obtain the electrical parameters of the load system and execute the steps 201-204 above.

[0050] Step 403: If the voltage of the energy storage unit is less than the preset voltage protection value, control the energy storage system to perform a charging operation so that the voltage of the energy storage unit reaches the preset voltage protection value.

[0051] If the voltage of the energy storage unit is lower than the preset voltage protection value, it means that the energy stored in the energy storage unit in the energy storage system is insufficient and cannot be output to the load system normally. Therefore, it is necessary to charge the energy storage system (control the energy storage system to perform charging operation, or charge it through an external power source, etc.) until the voltage of the energy storage unit reaches the preset voltage protection value.

[0052] In one specific implementation, the energy storage unit in the microgrid system includes multiple batteries, and the voltage V of each battery cell is monitored in real time. S Is the value (i.e., the voltage value of each battery) greater than or equal to V? SL Among them, the voltage of a single battery cell V S The value is the voltage of the cell with the lowest voltage in the battery pack of the battery system, V. SL This is the minimum protection value for the battery cell voltage set according to actual operating conditions (i.e., the preset voltage protection value). If it is greater than or equal to V... SL Then execute steps 201-204. If it is less than V... SL The energy storage unit is then charged until the voltage of each individual battery cell reaches either the minimum protected voltage value or the maximum protected voltage value V. SH stop.

[0053] In another specific implementation, the voltage of the energy storage unit in the energy storage system can be converted to obtain the state of charge (SOC) value, and based on this SOC value, it can be determined whether the energy storage unit needs to be charged, etc. This application does not limit this.

[0054] By tracking the voltage of the energy storage units, the normal operation of the energy storage system is ensured, thereby guaranteeing the stability of the microgrid system.

[0055] Optionally, in the above Figure 2 Based on this, this application also provides a possible implementation of an operation control method for a microgrid system, wherein the first power range includes: a light load range [Pm1 P m2 ), optimal power generation efficiency range [P] m2 P m3 ] and high load range (P m3 P mn The second power range includes: the optimal energy storage efficiency range [P]. c1 P c2 ]; Based on the first power range of the generation system in the microgrid system and multiple second power ranges of the energy storage system in the microgrid system, multiple third power ranges of the load system are determined, including: According to the high load range (P) m3 P mn and the rated power P of the energy storage system cn Determine the first interval (P) m3 +P c2 P mn +P cn ]; Based on the optimal power generation efficiency range [P] m2 P m3 ] and the optimal energy storage efficiency range [P c1 P c2 ], determine the second interval [P m2 +P c1 0.5 (P) m2 +P c1 +P m3 +P c2 )] and the third interval (0.5 (P) m2 +P c1 +P m3 +P c2 ), P m3 +P c2 ]; According to the high load range (P) m3 P mn ], Optimal power generation efficiency range [P m2 P m3 ] and the optimal energy storage efficiency range [P c1 P c2 ], determine the fourth interval (P) mn ,P m2 +P c1 ); According to the high load range (P) m3 P mn ], determine the fifth interval (P) m3 P mn ]; Based on the optimal power generation efficiency range [P] m2 P m3], determine the sixth interval [P m2 P m3 ]; Based on the optimal power generation efficiency range [P] m2 P m3 ], Optimal energy storage efficiency range [P c1 P c2 ], determine the seventh interval [P c1 P m2 ); Based on the optimal energy storage efficiency range [P] c1 P c2 Determine the eighth interval [0, P]. c1 ).

[0056] It should be noted that, in actual implementation, in order to simplify the control logic, the third power range may include one or more of the first range, second range, third range, fourth range, fifth range, sixth range, seventh range, and eighth range, and this application does not limit this.

[0057] Figure 5 An embodiment of this application provides a power generation system operating efficiency and power curve diagram, such as... Figure 5 As shown in the figure, the power range [P] is... m2 P m3 [P] represents the optimal power generation efficiency range. m1 P m2 (P) represents the lightly loaded section. m3 P mn [P] represents the high load range. When the power generation system operates in the power range [P]... m2 P m3 The efficiency is optimal at this time. (P) m1 Point P is the minimum power point of the power generation system. To ensure minimal wear and tear and low failure rates, the power generation system must operate at a power level no lower than this point P. m1 P mn The rated power point is the power point of the power generation system. The power generation system must not operate above this power point; otherwise, it will be considered an overload and will damage the power generation system.

[0058] Figure 6 An energy storage system operating efficiency and power curve is provided as an embodiment of this application, such as... Figure 6 As shown in the figure, [P] c1 P c2 [P represents the optimal energy storage efficiency range for the energy storage system] cn This is the rated power point of the energy storage system.

[0059] Based on the first and second power ranges, multiple third power ranges of the load system are determined as follows: First interval (P)m3 +P c2 P mn +P cn ]; Second interval [P] m2 +P c1 0.5 (P) m2 +P c1 +P m3 +P c2 )]; The third interval (0.5 (P) m2 +P c1 +P m3 +P c2 ), P m3 +P c2 ]; Fourth interval (P) mn ,P m2 +P c1 ); Fifth interval (P) m3 P mn ]; The sixth interval [P] m2 P m3 ]; Seventh interval [P] c1 P m2 ); The eighth interval [0, P] c1 ).

[0060] Continue to refer to Figure 5 , Figure 6 Since the optimal energy storage efficiency range has a wider power range than the optimal power generation efficiency range, when determining the power generation setting parameters and energy storage power setting parameters for each third power range, priority can be given to satisfying the power of the power generation system within the optimal power generation efficiency range, and the energy storage system can adjust the output power to meet the power demand of the load system.

[0061] It should be noted that the power supply efficiency of the microgrid system is optimal when both the energy storage system and the power generation system are operating at their optimal efficiency.

[0062] When the power supply efficiency of the microgrid system reaches its optimal level, the power supply efficiency of the microgrid system is: η 总 = i = (1, 2, ..., n) in The optimal efficiency value for the power supply side (generation system and / or energy storage system) in each microgrid system.

[0063] The following explains the power generation setting parameters and energy storage setting parameters corresponding to each third power range. For ease of explanation, the active power of the load system obtained in step 201 is referred to as P. load .

[0064] Optionally, based on the above embodiments, this application also provides a possible implementation of a microgrid system operation control method. Figure 7 A flowchart illustrating an operation control method for a microgrid system, as provided in another embodiment of this application; Figure 7 As shown, the power generation setting parameters and energy storage power setting parameters corresponding to the target power range are determined, including: Step 701: If the target power range is the first range, round up half of the active power parameters of the load system to obtain the power generation setting parameters. Step 702: Determine the energy storage power setting parameters based on the difference between the active power parameters of the load system and the power generation setting parameters.

[0065] If P load If the corresponding target power range is the first range, then the power generation setting parameter P m The active power parameter P of a half-load system load Round up (e.g.) =74.3kW, rounded up to 75kW), with the remaining load power provided by the energy storage system. That is: P m = ; Energy storage power setting parameter P of the energy storage system c = P load -P m .

[0066] Optionally, based on the above embodiments, this application also provides a possible implementation of a microgrid system operation control method. Figure 8 A flowchart illustrating an operation control method for a microgrid system, as provided in another embodiment of this application; Figure 8 As shown, the power generation setting parameters and energy storage power setting parameters corresponding to the target power range are determined, including: Step 801: If the target power range is the second, fourth, fifth, or eighth range, then determine the optimal power generation efficiency range [P]. m2 P m3 The lower limit is the power generation setting parameter; Step 802: Determine the energy storage power setting parameters based on the difference between the active power parameters of the load system and the power generation setting parameters.

[0067] If Pload If the corresponding target power range is any one of the second, fourth, fifth, or eighth ranges, then the power generation setting parameter P m The optimal power generation efficiency range [P] m2 P m3 The lower limit of ], i.e., P m =P m2 .

[0068] The energy storage power setting parameter is the difference between the active power parameter and the generation power setting parameter of the load system. Wherein, if P... load If the corresponding target power range is the second, fourth, or fifth range, then P c = P load -P m If P load The corresponding target power range is the eighth range, and the power generation system outputs P. m2 The energy storage system supplies power to the load system. c =P m2 -P load .

[0069] It should be noted that when the target power range is the second range, there exists a situation where both the power generation system and the energy storage system are simultaneously in their optimal efficiency range (i.e., the power generation system is in its optimal power generation efficiency range while the energy storage system is in its optimal energy storage efficiency range): Power generation system output P m =P m2 At that time, the energy storage system output power is P c Available in [P] c1 P c2 ].

[0070] When the target power range is the fourth range, there exists only one power generation system in the optimal efficiency region (i.e., the power generation system is in the optimal power generation efficiency range): the power generation system outputs P m =P m2 .

[0071] Optionally, based on the above embodiments, this application also provides a possible implementation of the operation control method for a microgrid system. Figure 9 A flowchart of a microgrid system operation control method provided in a second embodiment of this application; as shown Figure 9 As shown, the power generation setting parameters and energy storage setting parameters corresponding to the target power range are determined, including: Step 901: If the target power range is the third range, then determine the optimal power generation efficiency range [P]. m2 P m3 The upper limit is the power generation setting parameter; Step 902: Determine the energy storage power setting parameters based on the difference between the active power parameters of the load system and the power generation setting parameters.

[0072] If P load If the corresponding target power range is the third range, then the power generation setting parameter P m The optimal power generation efficiency range [P] m2 P m3 The upper limit of ], i.e., P m =P m3 .

[0073] The energy storage power setting parameter is the difference between the active power parameter of the load system and the power generation setting parameter, i.e., P. c = P load -P m .

[0074] It should be noted that when the target power range is the third range, there exists a situation where both the power generation system and the energy storage system are simultaneously in their optimal efficiency range (i.e., the power generation system is in its optimal power generation efficiency range while the energy storage system is in its optimal energy storage efficiency range): Power generation system output P m =P m3 At that time, the energy storage system output power is P c Available in [P] c1 P c2 ].

[0075] Optionally, based on the above embodiments, this application also provides a possible implementation of a microgrid system operation control method, which determines the power generation setting parameters and energy storage power setting parameters corresponding to the target power range, including: If the target power range is the sixth range, then the active power parameter of the load system is determined to be the power generation setting parameter, and the energy storage power setting parameter is determined to be zero.

[0076] If P load The corresponding target power range is the sixth range, then the power generation setting parameter P m The active power parameter of the load system, i.e., P m =P load The energy storage power setting parameter is 0. At this time, the microgrid system composed of the power generation system and the load system is operating in an optimal efficiency state.

[0077] If the target power range is the seventh range, the power generation setting parameter is set to zero, and the active power parameter of the load system is set to the energy storage power setting parameter.

[0078] If P load The corresponding target power range is the seventh range, then the power generation setting parameter P m=0, that is, P m =0. The energy storage power setting parameter is the active power parameter of the load system, i.e., P. c = P load At this point, the microgrid system, composed of the energy storage system and the load system, is operating at its optimal efficiency.

[0079] The above is merely an example. In actual implementation, there may be other ways to set the third power range, as well as ways to set the power generation setting parameters and energy storage power setting parameters within each third power range. This application does not limit these methods.

[0080] It should also be noted that, in order to further optimize the speed at which the control system determines the active power parameters of the load system, the active power parameters of the load system can be compared with the range of the range in the order of the first range, the second range... the eighth range, until the target power range in which the active power parameters of the load system are located is determined; or the order of the eighth range, the seventh range... the first range, etc., can also be followed. This application does not limit this.

[0081] In summary, Table 1 is an optimal efficiency statistics table provided by an embodiment of this application. As shown in Table 1, this application has identified eight third power ranges, six of which enable the microgrid system to operate at optimal efficiency. Compared to traditional microgrid systems where the power generation system operates at full power and the energy storage system is only used for peak shaving and valley filling, power expansion, etc., the method of this application makes the microgrid system more energy-efficient, the energy storage system more efficient, and reduces operating costs. In particular, it reduces the consumption of non-renewable resources that may exist in the power generation system (such as fuel in diesel generators), thus reducing pollution.

[0082] Table 1. Statistical table of optimal efficiency provided in an embodiment of this application.

[0083] Optionally, in the above Figure 2 Based on this, this application also provides a possible implementation of the operation control method for a microgrid system. Figure 10 A flowchart illustrating a microgrid system operation control method provided in three embodiments of this application; as follows: Figure 10 As shown, the power parameters of the load system also include: the power factor of the load system; the method also includes: Step 1001: Determine the reactive power parameters of the load system based on the power factor and active power parameters of the load system.

[0084] Step 1002: Based on the detected reactive power parameters and the target reactive power parameters of the load system, adjust the state of the power generation system and energy storage so that the power factor of the adjusted power generation system is within the preset power factor range.

[0085] It should be noted that, in addition to meeting the above-mentioned optimal efficiency range, the reactive power supply of the load system may also affect the stable operation of the microgrid system, and thus affect the power generation efficiency of the energy storage system.

[0086] For example, due to their inherent characteristics, diesel generators have a power factor range between [leading 0.9, lagging 0.8]. When the reactive power demand of the load system exceeds this power factor range, the diesel generator will be unable to provide it, affecting the stable operation of the system. For instance, taking the power angle characteristic of a salient-pole generator as an example, the active power of the diesel generator is: ; Diesel generator reactive power: ; In the formula: m is the number of generator pole pairs; Ed is the generator electromotive force; U is the phase voltage; δ is the power angle; Xd is the generator reactance.

[0087] According to the power angle characteristics, when the reactive power of a diesel generator increases, the active power decreases, which means that less active power will be utilized in the same fuel load system. In order for more active power to be utilized in the microgrid, the power angle δ is usually changed to 90°. At this time, when the load system needs reactive power, there needs to be equipment to provide reactive power to the grid. The power factor adjustment range of the energy storage system is [-1,1], which can meet the reactive power demand in each quadrant. That is, it can input reactive power to the power generation system or absorb reactive power from the power generation system to adjust the power factor in the microgrid.

[0088] In one possible implementation, the reactive power value of the load system can be directly detected. Alternatively, a vector calculation can be performed on the reactive power value obtained by directly detecting the reactive power of the load system and calculating the reactive power value of the power generation system within a preset power factor interval [a1, a2]. Based on the detected reactive power value of the load system or the vector calculation result, the energy storage system is controlled to provide reactive power compensation to ensure that the power generation system operates within the power factor interval [a1, a2] corresponding to its optimal efficiency, thereby completing the reactive power adjustment of the microgrid system.

[0089] Optionally, in the above Figure 2 Based on this, this application also provides a possible implementation of an operation control method for a microgrid system, which further includes: Determine the load type of the load system; The microgrid system is operated and controlled according to the control strategy corresponding to the load type.

[0090] It should be noted that different control methods may exist depending on the type of load in the load system. First, let's explain the load types: Generally, loads can be classified by statistically analyzing the load power within the load system's operating cycle T. The classification principles are as follows: Continuous power load P cop A load whose power remains relatively constant within an agreed operating cycle, with power fluctuations not exceeding 10%.

[0091] Basic power load P prp If the load experiences significant power fluctuations within the agreed operating cycle, exceeding 10%, the diesel generator must be configured to operate at the highest load. The actual average load power is less than the base power.

[0092] Time-limited power load P tlp The power consumption time during the agreed operating cycle is less than 10% of the load.

[0093] If the calculated load system is a continuous power load P cop This makes the output power of the power generation system and the energy storage system equal to P. cop And it satisfies the optimal efficiency interval [P] m2 P m3 ] or [P m2 +P c1 P m3 +P c2 Furthermore, the battery operating time of the energy storage system must meet the battery capacity requirements; that is, the battery capacity of the energy storage system should be greater than or equal to the output power P of the energy storage system. av × Energy storage system battery operating time t 放电 Because this type of load system operates for a relatively long period within a cycle, it is generally possible to select batteries with a smaller rated power but a larger battery capacity, and set the starting voltage V of the battery cells in the energy storage system. SS High-value energy storage systems.

[0094] If the calculated load system belongs to the basic power load P prp This ensures that the output power of the power generation system and the energy storage system equals the average power of the load, and satisfies the optimal efficiency range [P]. m2 P m3 ] or [P m2 +P c1 P m3 +P c2 When the active power of the load system deviates from the average power at a certain moment, the energy storage system provides power compensation, or it can be intermittently supplemented by renewable energy sources. Furthermore, the battery operating time of the energy storage system must meet the battery capacity requirements; that is, the battery capacity of the energy storage system should be greater than or equal to the output power P of the energy storage system.av × Energy storage system battery operating time t 放电 This type of load system is suitable for high-power generation systems (such as diesel generators) and is paired with an energy storage system whose battery capacity is determined based on the longest time it deviates from the average load.

[0095] If the calculated load system belongs to a time-limited power load P tlp This ensures that the output power of the energy storage system equals the power of the time-limited load, and satisfies the optimal efficiency range [P]. c1 P c2 From the moment the load system stops to the moment it restarts, the energy storage system can operate within the optimal efficiency range of the power generation system. m2 P m3 [It can be charged, or supplemented by electricity from the grid or by renewable energy.]

[0096] The load characteristics are adjusted through the four-quadrant technology of the energy storage system to meet various characteristic loads, reduce the operating time of diesel generators under other power factors, and from the perspective of the whole control algorithm, effectively improve the system operating efficiency of the microgrid composed of diesel generator and energy storage, improve economic benefits, and reduce diesel pollution.

[0097] The operation control method of the microgrid system of this application will be described below with reference to a specific embodiment: Table 2 shows a load system configuration according to an embodiment of this application. As shown in Table 2, the average load power is 79.3kW, which allows for the configuration of a 100kW power generation system (e.g., a 100kW diesel generator). Since the maximum difference between the load power and the average power is 70.7kW, a 100kW energy storage system is required. Calculations show that the energy storage system battery, charged and discharged at 0.5C, needs a capacity of 200kWh. The optimal power generation efficiency range of the power generation system is [75kW, 85kW], i.e., P... m2 =75kW, P m3 =85kW, the optimal energy storage efficiency range of the energy storage system is [60kW, 90kW], that is, P c1 =60kW, P c2 =90kW.

[0098] Table 2. A load system configuration table provided in an embodiment of this application.

[0099] Referring to Table 1, the optimal power generation efficiency range of the power generation system, and the optimal energy storage efficiency range of the energy storage system, the third power range list corresponding to this embodiment can be obtained. Table 3 is the third power range list, as shown in Table 3: Table 3 List of Third Power Ranges

[0100] When the microgrid system is running, the total discharge capacity of the energy storage system during operation is 180kWh. The calculated depth of battery discharge is based on a single cell voltage of 2.8V, with a 5% margin. The single cell voltage range can be set from 2.9V to 3.55V.

[0101] Firstly, the voltage V of individual battery cells in the energy storage system can be monitored in real time. S If the value is greater than 2.8V (the energy storage system can also be set with SOC protection, for example, the value can be set to 5%), then the subsequent control judgment will be executed if it is greater than 2.8V; otherwise, a charging prompt will be made, and the energy storage system will be charged through the power generation system, the power grid, or an external energy source.

[0102] Then, the active power parameter P of the load system was analyzed. load The control system makes a judgment and detects the load power P. load If the system is operating within the range of (175, 200), then the power generation system outputs P. m Half the load power P load Round up to the nearest integer (e.g.) =79.3kW (taken as 80kW), the remaining load power is provided by the energy storage system, with an output power of P. c =P load -P m If it is not within that range, proceed to the next step.

[0103] The control system detects the active power parameter P of the load system. load If the system is operating in the range [135, 175], then check if it is operating in the range [135, 155], and then the power generation system outputs P. m For P m2 That is, the power generation system outputs 85kW, and the remaining load power is provided by the energy storage system, with an output power of P. c = P load -P m That is, the output power of the energy storage converter is 65kW. If not (i.e., the load power is in (155, 175]), then the power generation system outputs P. m For P m3 The remaining load power is provided by the energy storage system, with an output power of P. c =P load -P m If the load power P load Not in [P] m2 +P c1 P m3 +P c2 If the system is running, proceed to the next step. At this point, the microgrid system, consisting of the power generation system and the load, is operating at its optimal efficiency.

[0104] The control system detects the active power parameter P of the load system. load Is it operating in (100, 135)? If so, the power generation system outputs P. m2 The remaining load power is provided by the energy storage system, with an output power of P. c = P load -P m If not, proceed to the next step. At this point, the microgrid system, consisting of the power generation system and the load, is operating in an optimal efficiency state.

[0105] If the control system detects the active power parameter P of the load system load Is it operating in the high load power region (85, 100]? If so, the power generation system outputs P. m2 Energy storage system output power P c Satisfy load power P load -P m2 The system detects the active power parameter P of the load system. load =90kW, in the power range (85, 100], therefore the power output of the power generation system is 75kW, and the energy storage system outputs 90kW-75kW=25kW. At this time, the microgrid system composed of the power generation system and the load is operating in the optimal efficiency state.

[0106] If the control system detects the active power parameter P of the load system load If the system operates in the optimal efficiency power range [75, 85], the energy storage system will shut down and the power generation system will supply power P. m =P load For example, if the system detects a load power of 80kW, which is within the power range (85, 100], then the power output of the power generation system is 80kW. At this time, the microgrid system composed of the power generation system and the load is operating in an optimal efficiency state.

[0107] If the control system detects the active power parameter P of the load system load Operating in the light load region [60, 75), and detecting the voltage V of the individual battery cells in the energy storage system. S If the voltage value is greater than 2.8V, the power generation system will not start; instead, the energy storage system will supply power to the load. c = P load At this point, the microgrid system, consisting of the power generation system and the load, is operating at its optimal efficiency.

[0108] If the control system detects the active power parameter P of the load system load Operating in [0, 60), and detecting the voltage V of individual battery cells in the energy storage system. S When the value is greater than 2.8V, does the power generation system output P? m =P m2 The energy storage system is charging P c= P m2 -P load ,like Figure 10 As shown, the system detects a load power of 35kW. Within the power range [0, 60), the power generation system outputs 75kW, and the energy storage system charges P. c =85-35=50kW.

[0109] In addition to controlling and adjusting active power as described above, reactive power can also be controlled and adjusted: If the control system detects the reactive power of the load system and the reactive power of the energy storage system, and since the power generation system provides the maximum active power with a power factor of 1, while the power factor of most loads is 0.8 as shown in Table 2, then the reactive power consumption is Q. load = The energy storage converter outputs reactive power Q. c =Q load When the load power factor becomes 0.6, the energy storage converter is controlled to change the output reactive power.

[0110] The following describes the operation control device, electronic device, and storage medium used to implement the microgrid system provided in this application. The specific implementation process and technical effects are described above and will not be repeated below.

[0111] This application provides a possible implementation example of an operation control device for a microgrid system, which can execute the operation control method for the microgrid system provided in the above embodiments. Figure 11 This is a schematic diagram of an operation control device for a microgrid system provided in one embodiment of this application. Figure 11 As shown, the operation control device 100 of the microgrid system includes: The acquisition module 11 is used to acquire the power parameters of the load system in the microgrid system. The power parameters of the load system include: the active power parameters of the load system. The interval determination module 13 is used to determine multiple third power intervals of the load system based on the first power interval of the power generation system in the microgrid system and the second power interval of the energy storage system in the microgrid system. The target range determination module 15 is used to determine the target power range in which the active power parameters of the load system are located from multiple third power ranges. Parameter determination module 17 is used to determine the power generation setting parameters and / or energy storage power setting parameters corresponding to the target power range; The adjustment module 19 is used to adjust the state of the power generation system and / or the state of the energy storage system so that the active power parameters of the power generation system after adjustment are the power generation setting parameters, and the active power parameters of the energy storage system after adjustment are the energy storage power setting parameters.

[0112] Optionally, the first power range includes: the light load range [P] m1 P m2 ), optimal power generation efficiency range [P] m2 P m3 ] and high load range (P m3 P mn The second power range includes: the optimal energy storage efficiency range [P]. c1 P c2 ].

[0113] Optionally, the third power range includes one or more of the following ranges: first range, second range, third range, fourth range, fifth range, sixth range, seventh range, and eighth range. Interval determination module 13 is used to determine the high load interval (P) m3 P mn and the rated power P of the energy storage system cn Determine the first interval (P) m3 +P c2 P mn +P cn ]; Based on the optimal power generation efficiency range [P] m2 P m3 ] and the optimal energy storage efficiency range [P c1 P c2 ], determine the second interval [P m2 +P c1 0.5 (P) m2 +P c1 +P m3 +P c2 )] and the third interval (0.5 (P) m2 +P c1 +P m3 +P c2 ), P m3 +P c2 ]; According to the high load range (P) m3 P mn ], Optimal power generation efficiency range [P m2 P m3 ] and the optimal energy storage efficiency range [P c1 P c2 ], determine the fourth interval (P) mn ,P m2 +P c1 ); According to the high load range (P) m3 P mn ], determine the fifth interval (P) m3 P mn ]; Based on the optimal power generation efficiency range [P] m2 P m3 ], determine the sixth interval [P m2 P m3 ]; Based on the optimal power generation efficiency range [P] m2 P m3 ], Optimal energy storage efficiency range [P c1 P c2 ], determine the seventh interval [P c1 P m2 ); Based on the optimal energy storage efficiency range [P] c1 P c2 Determine the eighth interval [0, P]. c1 ).

[0114] Optionally, the parameter determination module 17 is used to round up half of the active power parameter of the load system to obtain the power generation setting parameter if the target power range is the first range; and to determine the energy storage power setting parameter based on the difference between the active power parameter of the load system and the power generation setting parameter.

[0115] Optionally, parameter determination module 17 is used to determine the optimal power generation efficiency range [P] if the target power range is the second range, the fourth range, the fifth range, or the eighth range. m2 P m3 The lower limit is the power generation setting parameter; the energy storage power setting parameter is determined based on the difference between the active power parameter of the load system and the power generation setting parameter.

[0116] Optionally, parameter determination module 17 is used to determine the optimal power generation efficiency range [P] if the target power range is the third range. m2 P m3 The upper limit of the power generation setting parameter is determined by the difference between the active power parameter of the load system and the power generation setting parameter.

[0117] Optionally, the parameter determination module 17 is used to determine the active power parameter of the load system as the power generation setting parameter and the energy storage power setting parameter as zero if the target power range is the sixth range; or, if the target power range is the seventh range, determine the power generation setting parameter as zero and the active power parameter of the load system as the energy storage power setting parameter.

[0118] Optional, a reactive power parameter calculation module is used to calculate the detected reactive power parameters of the load system based on the power factor and active power parameters of the load system. The reactive power adjustment module is used to adjust the state of the power generation system and the energy storage system based on the detected reactive power parameters and the target reactive power parameters of the load system, so that the power factor of the power generation system after adjustment is within the preset power factor range.

[0119] Optionally, a load type determination module is provided to determine the load type of the load system. The control module is used to control the operation of the microgrid system according to the control strategy corresponding to the load type.

[0120] The above-described device is used to execute the method provided in the foregoing embodiments, and its implementation principle and technical effect are similar, so they will not be described again here.

[0121] These modules can be one or more integrated circuits configured to implement the above methods, such as one or more Application Specific Integrated Circuits (ASICs), one or more digital signal processors (DSPs), or one or more Field Programmable Gate Arrays (FPGAs). Alternatively, when a module is implemented using processing element scheduler code, the processing element can be a general-purpose processor, such as a Central Processing Unit (CPU) or other processor capable of calling program code. Furthermore, these modules can be integrated together as a system-on-a-chip (SOC).

[0122] This application provides a possible implementation example of a control device capable of executing the operation control method for the microgrid system provided in the above embodiments. Figure 12 This is a schematic diagram of a control device provided in an embodiment of this application. The control device may be an electronic device or a computing device that integrates the control system of the microgrid system of this application.

[0123] The control device includes a processor 1201, a storage medium 1202, and a bus. The storage medium stores program instructions executable by the processor. When the control device is running, the processor communicates with the storage medium via the bus, and the processor executes the program instructions to perform the steps of the aforementioned microgrid system operation control method. The specific implementation method and technical effects are similar and will not be described in detail here.

[0124] This application provides a possible implementation example of a computer-readable storage medium capable of executing the operation control method for a microgrid system provided in the above embodiments. The storage medium stores a computer program, and the computer program, when run by a processor, executes the steps of the operation control method for the microgrid system.

[0125] A computer program stored in a storage medium may include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute some steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0126] In the several embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0127] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0128] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional units.

[0129] The integrated units implemented as software functional units described above can be stored in a computer-readable storage medium. These software functional units, stored in a storage medium, include several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) or processor to execute partial steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0130] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A method for operating and controlling a microgrid system, characterized in that, The method includes: Obtain the power parameters of the load system in the microgrid system, wherein the power parameters of the load system include: the active power parameters of the load system; Based on the first power range of the power generation system in the microgrid system and the second power range of the energy storage system in the microgrid system, multiple third power ranges of the load system are determined; the first power range includes a light load range [P m1 P m2 ), optimal power generation efficiency range [P] m2 P m3 ] and high load range (P m3 P mn At least one of the following; the second power range includes: the optimal energy storage efficiency range [P] c1 P c2 The optimal energy storage efficiency range [P] c1 P c2 [P] is wider than the optimal power generation efficiency range. m2 P m3 ]; From the plurality of third power ranges, determine the target power range in which the active power parameters of the load system are located; According to the allocation strategy that prioritizes the power generation setting parameters falling within the optimal power generation efficiency range and the energy storage system undertakes the difference adjustment, the power generation setting parameters and / or energy storage power setting parameters corresponding to the target power range are determined; wherein, when the active power parameter of the load system is lower than the lower limit of the optimal energy storage efficiency range, the power generation setting parameter is the lower limit of the optimal power generation efficiency range, and the energy storage power setting parameter is the difference between the power generation setting parameter and the active power parameter of the load system; Adjust the state of the power generation system and / or the state of the energy storage system so that the active power parameters of the power generation system after adjustment are the power generation setting parameters, and the active power parameters of the energy storage system after adjustment are the energy storage setting parameters.

2. The method as described in claim 1, characterized in that, The third power range includes one or more of the following ranges: first range, second range, third range, fourth range, fifth range, sixth range, seventh range, and eighth range. The step of determining multiple third power ranges of the load system based on the first power range of the power generation system in the microgrid system and the second power range of the energy storage system in the microgrid system includes: According to the high load range (P) m3 P mn ] and the rated power P of the energy storage system cn Determine the first interval (P) m3 +P c2 P mn +P cn ]; According to the optimal power generation efficiency range [P] m2 P m3 ] and the optimal energy storage efficiency range [P c1 P c2 ], determine the second interval [P m2 +P c1 0.5 (P) m2 +P c1 +P m3 +P c2 )] and the third interval (0.5 (P) m2 +P c1 +P m3 +P c2 ), P m3 +P c2 ]; According to the high load range (P) m3 P mn The optimal power generation efficiency range [P] m2 P m3 ] and the optimal energy storage efficiency range [P c1 P c2 ], determine the fourth interval (P mn ,P m2 +P c1 ); According to the high load range (P) m3 P mn ], determine the fifth interval (P) m3 P mn ]; According to the optimal power generation efficiency range [P] m2 P m3 ], determine the sixth interval [P m2 P m3 ]; According to the optimal power generation efficiency range [P] m2 P m3 The optimal energy storage efficiency range [P] c1 P c2 ], determine the seventh interval [P c1 P m2 ); According to the optimal energy storage efficiency range [P] c1 P c2 ], determine the eighth interval [0, P c1 ).

3. The method as described in claim 2, characterized in that, The determination of the power generation setting parameters and energy storage setting parameters corresponding to the target power range includes: If the target power range is the first range, half of the active power parameter of the load system is rounded up to obtain the power generation setting parameter; If the target power range is the second range, or the fourth range, or the fifth range, or the eighth range, then the optimal power generation efficiency range [P] is determined. m2 P m3 The lower limit of ] is the power generation setting parameter; If the target power range is the third range, then the optimal power generation efficiency range [P] is determined. m2 P m3 The upper limit of ] is the power generation setting parameter; The energy storage power setting parameter is determined based on the difference between the active power parameter of the load system and the power generation setting parameter.

4. The method as described in claim 2, characterized in that, The determination of the power generation setting parameters and energy storage setting parameters corresponding to the target power range includes: If the target power range is the sixth range, then the active power parameter of the load system is determined to be the power generation setting parameter, and the energy storage power setting parameter is determined to be zero; or, If the target power range is the seventh range, the power generation setting parameter is determined to be zero, and the active power parameter of the load system is determined to be the energy storage power setting parameter.

5. The method as described in claim 1, characterized in that, The power parameters of the load system further include: the power factor of the load system; the method further includes: The detected reactive power parameters of the load system are determined based on the power factor and active power parameters of the load system. Based on the detected reactive power parameters and the target reactive power parameters of the load system, the states of the power generation system and the energy storage system are adjusted so that the power factor of the power generation system after adjustment is within a preset power factor range.

6. The method as described in claim 1, characterized in that, The method further includes: Determine the load type of the load system; The microgrid system is operated and controlled according to the control strategy corresponding to the load type.

7. An operation control device for a microgrid system, characterized in that, include: The acquisition module is used to acquire the power parameters of the load system in the microgrid system, wherein the power parameters of the load system include: the active power parameters of the load system; The interval determination module is used to determine multiple third power intervals of the load system based on a first power interval of the power generation system in the microgrid system and a second power interval of the energy storage system in the microgrid system; the first power interval includes a light load interval [P]. m1 P m2 ), optimal power generation efficiency range [P] m2 P m3 ] and high load range (P m3 P mn At least one of the following; the second power range includes: the optimal energy storage efficiency range [P] c1 P c2 The optimal energy storage efficiency range [P] c1 P c2 [P] is wider than the optimal power generation efficiency range. m2 P m3 ]; The target range determination module is used to determine the target power range in which the active power parameters of the load system are located from the plurality of third power ranges; The parameter determination module is used to determine the power generation setting parameters and / or energy storage power setting parameters corresponding to the target power range according to the allocation strategy of prioritizing the power generation setting parameters to fall within the optimal power generation efficiency range and having the energy storage system undertake the difference adjustment; wherein, when the active power parameter of the load system is lower than the lower limit of the optimal energy storage efficiency range, the power generation setting parameter is the lower limit of the optimal power generation efficiency range, and the energy storage power setting parameter is the difference between the power generation setting parameter and the active power parameter of the load system; An adjustment module is used to adjust the state of the power generation system and / or the state of the energy storage system, so that the active power parameters of the power generation system after adjustment are the power generation setting parameters, and the active power parameters of the energy storage system after adjustment are the energy storage setting parameters.

8. A control device, characterized in that, include: The device includes a processor, a storage medium, and a bus. The storage medium stores program instructions executable by the processor. When the electronic device is running, the processor communicates with the storage medium via the bus. The processor executes the program instructions to perform the steps of the operation control method for a microgrid system as described in any one of claims 1 to 6.

9. A microgrid control system, characterized in that, The microgrid control system includes: a power generation system, an energy storage system, a load system, and a control system; The control system is connected to the power generation system, the energy storage system, and the load system respectively to execute the steps of the operation control method of the microgrid system as described in any one of claims 1 to 6.

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