Privacy protection control method and system for space-ground integrated micro-grid cluster

Abstract

The invention discloses a privacy protection control method and system for a space-ground integrated micro-grid cluster, and the method comprises the steps: building a hybrid control model according to the equipment attribute information of distributed power generation equipment, collecting the current state information of the distributed power generation equipment, adding a noise signal to the current state information, generating a first state signal, and transmitting the first state signal to a server; sending the first state signal to neighbor power generation equipment adjacent to the distributed power generation equipment in the space-ground integrated micro-grid cluster, receiving a second state signal sent by the neighbor power generation equipment, analyzing the second state signal, obtaining equipment state information of the neighbor power generation equipment, and sending the equipment state information to the distributed power generation equipment; and inputting the current state information and the equipment state information into the hybrid control model, generating a control signal, and controlling the distributed power generation equipment based on the control signal, thereby effectively avoiding communication and data transmission leakage while ensuring efficient control of the distributed power generation equipment, and improving the reliability of the distributed power generation equipment. And the safety performance of the space-ground integrated micro-grid cluster is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of microgrids, and in particular, to a privacy protection control method and system for a space-earth integrated microgrid cluster. Background Art

[0002] The development of the space-earth integrated information network provides a revolutionary solution for the energy management and communication needs in remote areas. Remote areas such as mountaintop regions and isolated islands have long faced huge challenges due to the lack of reliable communication and energy infrastructure. Compared with traditional communication methods, the space-earth integrated information network combines satellite constellations with existing terrestrial cellular networks, which not only greatly improves the reliability and stability of the microgrid cluster, but also provides an economically efficient new mode for the dispatching and load management of distributed renewable energy. This mode can achieve seamless and reliable Internet connection globally, laying a technical foundation for the cross-regional coordination of the energy Internet.

[0003] In the environment of the space-earth integrated information network, the microgrid cluster faces more severe information security challenges due to its dependence on satellite communication links. Satellite data transmission is vulnerable to eavesdropping and attacks, and data leakage will directly threaten the safe operation of the system. Currently, it cannot fully meet the long-term security requirements in the space-earth integrated information network environment. Therefore, there is a risk of leakage in the data and signal transmission process between distributed generation devices in the microgrid cluster, resulting in the inability to efficiently coordinate between distributed generation devices, seriously affecting the overall stability and security of the microgrid cluster. Summary of the Invention

[0004] The main objective of the present invention is to provide a privacy protection control method and system for a space-earth integrated microgrid cluster, aiming to solve the technical problem that the prior art cannot effectively avoid the security leakage risk existing in the communication process between distributed generation devices in the space-earth integrated microgrid cluster, resulting in the inability to efficiently coordinate between distributed generation devices, and seriously affecting the overall stability and security of the microgrid cluster.

[0005] To achieve the above objective, the present invention provides a privacy protection control method for a space-earth integrated microgrid cluster. The privacy protection control method for a space-earth integrated microgrid cluster is applied to distributed generation devices in the space-earth integrated microgrid cluster. The microgrid cluster includes multiple distributed generation devices, and the distributed generation devices are sequentially communicatively connected to each other. The privacy protection control method for a space-earth integrated microgrid cluster includes: Constructing a hybrid control model according to the device attribute information of the distributed generation device; Collecting the current state information of the distributed generation device, and adding a noise signal to the current state information to generate a first state signal; Send the first status signal to the neighbor power generation equipment adjacent to the distributed power generation equipment in the microgrid cluster, and receive the second status signal sent by the neighbor power generation equipment; Parse the second status signal to obtain the equipment status information of the neighbor power generation equipment; Input the current status information and the equipment status information into the hybrid control model to generate a control signal, and control the distributed power generation equipment based on the control signal.

[0006] Optionally, the hybrid control model includes a frequency control module and a power control module. The frequency control module includes: Among them, represents the frequency control input parameter, and represent the frequency control gain coefficients of the frequency control module, represents the actual output frequency parameter of the distributed power generation equipment represents the frequency reference state quantity of the frequency control module, represents the time node of the frequency reference state quantity at the left limit, represents the th neighbor power generation equipment at the left limit of the frequency state variable at the time node represents the time-varying control gain parameter, represents the set of neighbor power generation equipment of the distributed power generation, is the derivative of the frequency reference state variable represents the kth time node, indicates belongs to non-negative integers, represents the set of non-negative integers; The power control module includes: Among them, represents the power control input parameter, and represent the power control gain coefficients of the power control module, represents the power droop coefficient of the distributed power generation equipment ​​​​ represents the active power output measurement value of the distributed generation device , represents the power reference status variable of the power control module represents the time node of the power reference status variable at the left limit represents the th neighbor generation device at the left limit of the time node of the power status variable is the derivative of the power reference status variable .

[0007] Optionally, constructing the hybrid control model according to the device attribute information of the distributed generation device includes: Determining the time-varying control gain parameter according to the device attribute information of the distributed generation device and the noise generation module: wherein, and are positive constants, is the gain adjustment coefficient, used to adjust the rate of change of the gain parameter with time, is the time-varying control gain parameter; Constructing a hybrid control model based on the time-varying control gain parameter.

[0008] Optionally, collecting the current state information of the distributed generation device and adding a noise signal to the current state information to generate a first state signal includes: Collecting the current state information of the distributed generation device and generating an initial state signal based on the current state information, the initial state signal including an initial frequency signal and an initial power signal; Constructing a noise generation module and adding a noise signal to the initial state signal based on the noise generation module to generate a first state signal, the first state signal including a frequency encryption signal and a power encryption signal: wherein, represents the frequency encryption signal of the distributed generation device , represents the time node of the left limit, represents the initial frequency signal of the distributed generation device , denotes the noise signal added to the initial frequency signal, denotes the distributed generation device of the initial power signal, denotes the distributed generation device of the power encryption signal, denotes the noise signal obeys the Laplace distribution, and the noise mean is 0, is the scale parameter, represents the k-th time node, denotes belongs to non-negative integers, represents the set of non-negative integers.

[0009] Optionally, the constructed noise generation module includes: Construct a sensitivity function according to the time-varying control gain parameter of the hybrid control model; Determine the differential privacy coefficient based on the sensitivity function: Among them, represents the time node of the sensitivity function, represents the differential privacy coefficient, represents the scale parameter of the noise signal, is the total length of the time series; Construct a noise generation module according to the differential privacy coefficient.

[0010] Optionally, the inputting the current state information and the device state information into the hybrid control model to generate a control signal, and controlling the distributed generation device based on the control signal includes: Construct the device control model of the distributed generation device, and the device control model is an active power frequency control model: Among them, is the actual frequency of the distributed generation device, is the desired frequency of the distributed generation device, is the power droop coefficient, is the measured value of the active power output of the distributed generation device, is the expected value of the active power output, is the filter time constant, denotes the measured value of the active power output of the change rate, denotes the active power output value of the distributed generation device; Input the current state information and the device state information into the hybrid control model to generate a control signal, and input the control signal into the device control model to control the distributed generation device.

[0011] In addition, to achieve the above object, the present invention also proposes a privacy protection control system for a space-ground integrated microgrid cluster, and the privacy protection control system for a space-ground integrated microgrid cluster includes: A hybrid control module for constructing a hybrid control model according to the device attribute information of the distributed generation device; An information processing module for collecting the current state information of the distributed generation device and adding a noise signal to the current state information to generate a first state signal; A signal transceiver module for sending the first state signal to a neighbor generation device adjacent to the distributed generation device in the space-ground integrated microgrid cluster and receiving a second state signal sent by the neighbor generation device; A signal analysis module for analyzing the second state signal to obtain the device state information of the neighbor generation device; A device control module for inputting the current state information and the device state information into the hybrid control model to generate a control signal, and controlling the distributed generation device based on the control signal.

[0012] Optionally, the hybrid control model includes a frequency control module and a power control module, and the frequency control module includes: Wherein, represents a frequency control input parameter, and represent the frequency control gain coefficients of the frequency control module, represents the actual output frequency parameter of the distributed generation device , represents the frequency reference state quantity of the frequency control module, represents a time node at the left limit of the frequency reference state quantity, represents the th neighbor generation device at the left limit of the frequency state variable at the time node , represents a time-varying control gain parameter, represents the set of neighbor generation devices of the distributed generation, is the derivative of the frequency reference state variable , represents the th time node, represents the set of non - negative integers, means belongs to non - negative integers; The power control module includes: wherein, represents the power control input parameter, and represent the power control gain coefficient of the power control module, represents the power droop coefficient of the distributed generation device , represents the distributed generation device measured value of the active power output, represents the power reference state variable of the power control module, represents the time node power reference state variable at the left limit of, represents the th neighbor generation device at the left limit of the time node power state variable of, is the derivative of the power reference state variable .

[0013] Optionally, the hybrid control module is further configured to determine a time - varying control gain parameter according to the device attribute information of the distributed generation device and the noise generation module: wherein, and are positive constants, is the gain adjustment coefficient, used to adjust the rate of change of the gain parameter with time, is the time - varying control gain parameter; Construct a hybrid control model based on the time - varying control gain parameter.

[0014] Optionally, the information processing module is further configured to collect the current state information of the distributed generation device and generate an initial state signal based on the current state information, and the initial state signal includes an initial frequency signal and an initial power signal; Construct a noise generation module, and add a noise signal to the initial state signal based on the noise generation module to generate a first state signal, where the first state signal includes a frequency encryption signal and a power encryption signal: Among them, represents the frequency encryption signal of the distributed generation device of, represents the left limit of the time node of, represents the initial frequency signal of the distributed generation device of, represents the noise signal added to the initial frequency signal, represents the initial power signal of the distributed generation device of, represents the power encryption signal of the distributed generation device of, represents the noise signal obeys the Laplace distribution, and the noise mean is 0, is the scale parameter, represents the th time node in the time series, represents the set of non-negative integers, represents belongs to non-negative integers.

[0015] In addition, to achieve the above object, the present application also proposes a privacy protection control device for an integrated space-ground microgrid cluster, where the device includes: a memory, a processor, and a computer program stored on the memory and executable on the processor, and the computer program is configured to implement the steps of the privacy protection control method for an integrated space-ground microgrid cluster as described above.

[0016] In addition, to achieve the above object, the present application also proposes a computer-readable storage medium, where a computer program is stored on the computer-readable storage medium, and when the computer program is executed by a processor, it implements the steps of the privacy protection control method for an integrated space-ground microgrid cluster as described above.

[0017] In addition, to achieve the above object, the present application also provides a computer program product, where the computer program product includes a computer program, and when the computer program is executed by a processor, it implements the steps of the privacy protection control method for an integrated space-ground microgrid cluster as described above.

[0018] The present invention is applied to distributed power generation equipment in a space-ground integrated microgrid cluster. The microgrid cluster includes multiple distributed power generation equipment, and the distributed power generation equipment is communicatively connected in sequence. The present invention constructs a hybrid control model according to the device attribute information of the distributed power generation equipment; collects the current state information of the distributed power generation equipment, adds a noise signal to the current state information to generate a first state signal; sends the first state signal to the neighboring power generation equipment adjacent to the distributed power generation equipment in the microgrid cluster, and receives a second state signal sent by the neighboring power generation equipment; analyzes the second state signal to obtain the device state information of the neighboring power generation equipment; inputs the current state information and the device state information into the hybrid control model to generate a control signal, and controls the distributed power generation equipment based on the control signal. Since the present invention adds noise to the interaction signal between devices and performs signal interaction with adjacent neighboring power generation equipment based on the signal after noise processing, the communication privacy and security between the power generation equipment are effectively improved. While ensuring the efficient control of the distributed power generation equipment, communication and data transmission leakage are effectively avoided, and the security performance of the space-ground integrated microgrid cluster is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a schematic structural diagram of a privacy protection control device for a space-ground integrated microgrid cluster in the hardware operating environment related to the embodiment solution of the present invention; Figure 2 It is a schematic flowchart of an embodiment of a privacy protection control method for a space-ground integrated microgrid cluster according to the present invention; Figure 3 It is a schematic block diagram of an embodiment of a privacy protection control system for a space-ground integrated microgrid cluster according to the present invention.

[0021] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] Refer to Figure 1 , Figure 1 It is a schematic structural diagram of a privacy protection control device for a space-ground integrated microgrid cluster in the hardware operating environment related to the embodiment solution of the present invention.

[0024] As shown in Figure 1 , the privacy protection control device for the space-ground integrated microgrid cluster may include: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to implement connection communication between these components. The user interface 1003 may include a display screen (Display) and an input unit such as a keyboard (Keyboard). Optionally, the user interface 1003 may further include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a Wireless-Fidelity (WI-FI) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk memory. Optionally, the memory 1005 may also be a storage system independent of the aforementioned processor 1001.

[0025] Those skilled in the art can understand that Figure 1 the structure shown in

[0026] does not constitute a limitation on the privacy protection control device for the space-ground integrated microgrid cluster, and may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements. Figure 1 As shown in

[0027] In Figure 1 , in the privacy protection control device for the space-ground integrated microgrid cluster shown, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the privacy protection control device for the space-ground integrated microgrid cluster of the present invention may be disposed in the privacy protection control device for the space-ground integrated microgrid cluster. The privacy protection control device for the space-ground integrated microgrid cluster calls the privacy protection control program stored in the memory 1005 through the processor 1001 and executes the privacy protection control method for the space-ground integrated microgrid cluster provided by the embodiments of the present invention.

[0028] An embodiment of the present invention provides a privacy protection control method for an integrated space-ground microgrid cluster. Refer to Figure 2 , Figure 2 which is a schematic flowchart of an embodiment of the privacy protection control method for the integrated space-ground microgrid cluster of the present invention.

[0029] In this embodiment, the privacy protection control method for the integrated space-ground microgrid cluster is applied to distributed generation devices in the microgrid cluster. The microgrid cluster includes multiple distributed generation devices, and the distributed generation devices are sequentially communicatively connected to each other. The privacy protection control method for the integrated space-ground microgrid cluster includes the following steps: Step S10: Construct a hybrid control model according to the device attribute information of the distributed generation device.

[0030] It should be understood that the microgrid cluster can be formed by interconnecting and operating multiple microgrids in a coordinated manner to form a larger-scale power system. The microgrid cluster includes multiple distributed generation devices, and the distributed generation devices can be solar generators, wind turbines, thermal power generators, etc.

[0031] It should be noted that the execution subject of this embodiment can be the control device of the distributed generation device in the integrated space-ground microgrid cluster. The control device is a computing service device with data processing, network communication, and program running functions, such as a central controller or an integrated processor, etc., or a terminal electronic device capable of implementing the above functions. Hereinafter, the privacy protection control device for the integrated space-ground microgrid cluster (abbreviated as the control device) is used as an example to illustrate this embodiment and the following embodiments.

[0032] It should be noted that the hybrid control model can be a distributed hybrid controller for controlling the frequency recovery and power distribution of the power generation device. The device attribute information can be information such as the device frequency parameter, active power parameter, and control gain parameter of the distributed generation device.

[0033] In some embodiments, the hybrid control model may include an active power control module and a frequency control module. To achieve the frequency recovery and precise active power distribution of each distributed generator in the microgrid cluster, the control device can respectively set a distributed frequency control module and a distributed active power control module.

[0034] Furthermore, in order to avoid control deviation problems and improve control efficiency, the hybrid control model includes a frequency control module and a power control module. In the traditional droop control method, when there is a deviation in active power, the distributed generation device The frequency will also be affected, resulting in frequency deviation. To achieve frequency recovery and accurate active power distribution of each distributed generation device in the microgrid, in one embodiment, the frequency control module includes: Among them, each distributed generation device exchanges information at discrete moments. represents the moment (i.e., time node), and is defined as ; it is defined that , t k+1 − t k = h k ≥ h min ; represents the minimum time interval for information exchange between two adjacent distributed generation devices.

[0035] Among them, represents the frequency control input parameter, and represent the frequency control gain coefficients of the frequency control module, and , represents the actual output frequency parameter of the distributed generation device , represents the frequency reference state quantity of the frequency control module, represents the frequency reference state quantity at the left limit of the time node , represents the th neighbor generation device's frequency state variable at the left limit of the time node , represents the time-varying control gain parameter, represents the set of neighbor generation devices of the distributed generation, is the derivative of the frequency reference state variable , represents the th time node, indicates that belongs to the set of non-negative integers, represents the set of non-negative integers; The power control module includes: Among them, represents the power control input parameter, and represents the power control gain coefficient of the power control module, represents the distributed generation equipment 's power droop coefficient, represents the distributed generation equipment 's measured active power output value, represents the power reference state variable of the power control module, represents the time node 's power reference state variable at the left limit, represents the th neighbor generation equipment's power state variable at the left limit of the time node ; is the derivative of the power reference state variable .

[0036] Furthermore, to ensure the operating stability of the distributed generation equipment, the above step S10 may include: Step S11: Determine the time-varying control gain parameter according to the equipment attribute information of the distributed generation equipment and the noise generation module; Step S12: Construct a hybrid control model based on the time-varying control gain parameter.

[0037] It should be noted that in order to enable the frequencies and active powers of the distributed generation equipment in the space-ground integrated microgrid cluster to achieve asymptotically unbiased output average consensus with the required accuracy and meet the predefined differential privacy coefficient, the control device can design a time-varying control gain, referring to the following formula: Among them, and are positive constants, is the gain adjustment coefficient, used to adjust the rate of change of the gain parameter with time, is the time-varying control gain parameter. Under non-decaying noise, by selecting an appropriate control gain , it is ensured that the hybrid control model can converge and ensure the predefined accuracy. In addition, the control device can improve the accuracy by reducing .

[0038] Step S20: Collect the current state information of the distributed generation equipment and add a noise signal to the current state information to generate a first state signal.

[0039] It should be noted that the current state information may be the current device state information of the distributed power generation device to which the control device belongs. For example, the current state information may include the frequency and active power of the distributed power generation device.

[0040] It can be understood that the first state signal may be a noise-encrypted signal generated after adding noise to the current state information, where the noise signal may be non-decaying noise.

[0041] In a specific implementation, to achieve signal encryption, non-decaying noise is added to the frequency signal and active power signal exchanged between distributed power generation devices in a microgrid cluster, thereby enhancing the security and anti-interference ability of the signal and obtaining the signals finally sent out by each unit.

[0042] Furthermore, to improve communication security and avoid noise decay over time, the above step S20 may include: Step S21: Collect the current state information of the distributed power generation device and generate an initial state signal based on the current state information. The initial state signal includes an initial frequency signal and an initial power signal; Step S22: Construct a noise generation module and add a noise signal to the initial state signal based on the noise generation module to generate a first state signal. The first state signal includes a frequency encrypted signal and a power encrypted signal.

[0043] It should be noted that the control device can adopt a series of time-varying control gains to establish a privacy mechanism, and these privacy mechanisms require the privacy noise to decay exponentially over time. Using non-decaying privacy noise, the transmitted information can maintain a random and invariant variance, and the true information will not be directly exposed to eavesdroppers over time. The noise generation module is expressed as: Among them, represents the frequency encrypted signal of the distributed power generation device ; represents the left limit of the time node ; represents the initial frequency signal of the distributed power generation device ; represents the noise signal added to the initial frequency signal ; represents the initial power signal of the distributed power generation device ; represents the power encrypted signal of the distributed power generation device ; Subject to Laplace distribution, the noise mean is 0, is the scale parameter, represents the th time node, denotes belongs to non - negative integers, represents the set of non - negative integers.

[0044] Furthermore, to enhance signal confidentiality, step S22 above may include: Step S221: Construct a sensitivity function according to the time - varying control gain parameter of the hybrid control model; Step S222: Determine the differential privacy coefficient based on the sensitivity function; Step S223: Construct a noise generation module according to the differential privacy coefficient.

[0045] It should be noted that the differential privacy coefficient satisfies the following formula: where, represents the sensitivity function of time node , and the sensitivity function represents the sensitivity of the system output to the input data, represents the differential privacy coefficient, represents the scale parameter of the noise signal, is the total length of the time series, and the differential privacy coefficient can be described by the sum of sensitivities. The larger, the smaller, and thus the smaller, and the better the protection effect. Similarly, if we choose privacy noise with a larger parameter , then will become smaller, and the confidentiality will be stronger.

[0046] Step S30: Send the first status signal to the neighbor power generation equipment adjacent to the distributed power generation equipment in the micro - grid cluster, and receive the second status signal sent by the neighbor power generation equipment.

[0047] It should be noted that the neighbor power generation equipment can be an adjacent generator communicatively connected to the distributed power generation equipment to which the control equipment belongs. The above - mentioned second status signal can be a status signal generated by adding noise to the current status information of the neighbor power generation equipment itself.

[0048] Step S40: Analyze the second status signal to obtain the equipment status information of the neighbor power generation equipment.

[0049] It can be understood that each distributed generator in the integrated space-ground microgrid collects its own status information (frequency and power) in real time. After adding noise to its own status information, it sends signals to adjacent generators through the communication network and receives the signals of adjacent generators in real time. After noise reduction and analysis of the signals of adjacent generators, the equipment status information of adjacent generators is obtained, and the own status information and the equipment status information of adjacent generators are used as dynamic inputs of the hybrid controller.

[0050] Step S50: Input the current status information and the equipment status information into the hybrid control model to generate a control signal, and control the distributed power generation equipment based on the control signal.

[0051] It can be understood that the control device inputs its own current status information and the equipment status information of the neighboring power generation equipment collected into the hybrid controller to generate a control signal, and performs frequency restoration control and active power distribution control on the distributed power generation equipment based on the control signal.

[0052] Further, in order to improve the frequency and power control efficiency, the above step S50 may include: Step S51: Construct an equipment control model for the distributed power generation equipment, and the equipment control model is an active power-frequency control model; Step S52: Input the current status information and the equipment status information into the hybrid control model to generate a control signal, and input the control signal into the equipment control model to control the distributed power generation equipment.

[0053] In some embodiments, the control device may construct an AC microgrid model composed of N distributed generators. This model is represented by a directed graph , where the i th distributed generator corresponds to a node i . The node set is given by , while represents the edge set.

[0054] In some embodiments, the control device can establish a frequency and active power model of the distributed generator using droop control. As a basic control strategy for coordinating distributed power sources, the working principle of droop control is similar to the primary frequency regulation of traditional synchronous generators. The frequency and active power model of the i th distributed generator is: The measured is obtained through a first-order low-pass filter: Where, is the actual frequency of the distributed generation device, is the desired frequency of the distributed generation device, is the power droop coefficient, is the measured value of the active power output of the distributed generation device, is the expected value of the active power output, is the filter time constant, represents the measured value of the active power output change rate of, represents the active power output value of the distributed generation device.

[0055] In some embodiments, the current state information and the device state information are input into the hybrid control model to generate a control signal, and the control signal is input into the device control model, with reference to the following formula: In this embodiment, a hybrid control model is constructed according to the device attribute information of the distributed generation device; the current state information of the distributed generation device is collected, and a noise signal is added to the current state information to generate a first state signal; the first state signal is sent to the neighbor generation devices adjacent to the distributed generation device in the space-ground integrated microgrid cluster, and the second state signal sent by the neighbor generation devices is received; the second state signal is analyzed to obtain the device state information of the neighbor generation devices; the current state information and the device state information are input into the hybrid control model to generate a control signal, and the distributed generation device is controlled based on the control signal; since in this embodiment, noise is added to the interaction signal between devices, and signal interaction is performed with adjacent neighbor generation devices based on the signal after noise processing, the communication privacy and security between the generation devices are effectively improved, while ensuring the efficient control of the distributed generation device, effectively avoiding the leakage of communication and data transmission, and greatly improving the security performance of the microgrid cluster.

[0056] In addition, an embodiment of the present invention also proposes a computer-readable storage medium, on which a privacy protection control program for a space-ground integrated microgrid cluster is stored. When the privacy protection control program for the space-ground integrated microgrid cluster is executed by a processor, the steps of the privacy protection control method for the space-ground integrated microgrid cluster as described above are implemented.

[0057] The computer-readable storage medium provided by this application can be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices, or components, or any combination of the above. More specific examples of the computer-readable storage medium may include, but are not limited to: electrical connections with one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM) or flash memory, optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this embodiment, the computer-readable storage medium can be any tangible medium that contains or stores a program, and this program can be used by or in conjunction with an instruction execution system, device, or component. The program code contained on the computer-readable storage medium can be transmitted by any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency), etc., or any suitable combination of the above.

[0058] The above computer-readable storage medium can be included in the privacy protection control device for the integrated space-ground microgrid cluster; it can also exist independently without being assembled into the privacy protection control device for the integrated space-ground microgrid cluster.

[0059] In addition, an embodiment of the present invention also provides a computer program product, including a privacy protection control program for the integrated space-ground microgrid cluster. When the privacy protection control program for the integrated space-ground microgrid cluster is executed by a processor, it implements the steps of the privacy protection control method for the integrated space-ground microgrid cluster as described above.

[0060] The specific implementation manner of the computer program product of the present invention is basically the same as that of each embodiment of the above privacy protection control method for the integrated space-ground microgrid cluster, and will not be elaborated here.

[0061] Refer to Figure 3 , Figure 3 which is a structural block diagram of an embodiment of the privacy protection control system for the integrated space-ground microgrid cluster of the present invention.

[0062] As Figure 3 shown, the privacy protection control system for the integrated space-ground microgrid cluster proposed by the embodiment of the present invention includes: A hybrid control module 10, configured to construct a hybrid control model according to the device attribute information of distributed generation devices; An information processing module 20, configured to collect the current status information of the distributed power generation device, and add a noise signal to the current status information to generate a first status signal; A signal transceiver module 30, configured to send the first status signal to a neighbor power generation device adjacent to the distributed power generation device in the space-ground integrated microgrid cluster, and receive a second status signal sent by the neighbor power generation device; A signal analysis module 40, configured to analyze the second status signal to obtain the device status information of the neighbor power generation device; A device control module 50, configured to input the current status information and the device status information into the hybrid control model to generate a control signal, and control the distributed power generation device based on the control signal.

[0063] Further, the hybrid control model includes a frequency control module and a power control module, and the frequency control module includes: Wherein, represents a frequency control input parameter, and represent the frequency control gain coefficient of the frequency control module, represents the distributed power generation device 's actual output frequency parameter, represents the frequency reference state quantity of the frequency control module, represents the time node 's frequency reference state quantity at the left limit, represents the th neighbor power generation device's frequency state variable at the left limit of the time node , represents a time-varying control gain parameter, represents the set of neighbor power generation devices of the distributed power generation, is the derivative of the frequency reference state variable , represents the th time node, denotes belongs to the set of non-negative integers, represents the set of non-negative integers; The power control module includes: Among them, represents the power control input parameter, and represents the power control gain coefficient of the power control module, represents the distributed generation device 's power droop coefficient, represents the distributed generation device 's measured active power output value, represents the power reference state quantity of the power control module, represents the time node 's power reference state quantity at the left limit, represents the th neighbor generation device's power state variable at the left limit of the time node ; is the derivative of the power reference state quantity .

[0064] Furthermore, the hybrid control module 10 is further configured to determine a time-varying control gain parameter according to the device attribute information of the distributed generation device and the noise generation module: Among them, and are positive constants, is the gain adjustment coefficient, used to adjust the rate of change of the gain parameter with time, is the time-varying control gain parameter; Construct a hybrid control model based on the time-varying control gain parameter.

[0065] Furthermore, the information processing module 20 is further configured to collect the current state information of the distributed generation device, and generate an initial state signal based on the current state information, where the initial state signal includes an initial frequency signal and an initial power signal; construct a noise generation module, and add a noise signal to the initial state signal based on the noise generation module to generate a first state signal, where the first state signal includes a frequency encryption signal and a power encryption signal: Among them, represents the frequency encryption signal of the distributed generation device , represents the left limit of the time node , represents the initial frequency signal of the distributed generation device ; denotes the noise signal added to the initial frequency signal, denotes the distributed generation device of the initial power signal, denotes the distributed generation device of the power encryption signal, denotes the noise signal obeys the Laplace distribution with a noise mean of 0, is the scale parameter, represents the th time node, denotes belongs to non - negative integers, represents the set of non - negative integers.

[0066] Furthermore, the information processing module 20 is further configured to construct a sensitivity function according to the time - varying control gain parameter of the hybrid control model; determine the differential privacy coefficient based on the sensitivity function: wherein, represents the sensitivity function of the time node , represents the differential privacy coefficient, represents the scale parameter of the noise signal, is the total length of the time series; Construct a noise generation module according to the differential privacy coefficient.

[0067] Furthermore, the device control module 50 is further configured to construct a device control model of the distributed generation device, and the device control model is an active power - frequency control model: wherein, is the actual frequency of the distributed generation device, is the desired frequency of the distributed generation device, is the power droop coefficient, is the measured value of the active power output of the distributed generation device, is the expected value of the active power output, is the filter time constant, denotes the measured value of the active power output change rate of, denotes the active power output value of the distributed generation device; Input the current state information and the device state information into the hybrid control model to generate a control signal, and input the control signal into the device control model to control the distributed power generation device.

[0068] In this embodiment, a hybrid control model is constructed according to the device attribute information of the distributed power generation device; the current state information of the distributed power generation device is collected, and a noise signal is added to the current state information to generate a first state signal; the first state signal is sent to the neighbor power generation devices adjacent to the distributed power generation device in the space-ground integrated microgrid cluster, and the second state signal sent by the neighbor power generation devices is received; the second state signal is parsed to obtain the device state information of the neighbor power generation devices; the current state information and the device state information are input into the hybrid control model to generate a control signal, and the distributed power generation device is controlled based on the control signal; since in this embodiment, noise is added to the interaction signals between devices, and signal interaction is performed with adjacent neighbor power generation devices based on the signals processed by the noise, the communication privacy and security between power generation devices are effectively improved. While ensuring the efficient control of the distributed power generation device, communication and data transmission leakage are effectively avoided, and the security performance of the space-ground integrated microgrid cluster is greatly improved.

[0069] The privacy protection control system for the space-ground integrated microgrid cluster provided in this application adopts the privacy protection control method for the space-ground integrated microgrid cluster in the above embodiment, and can solve the technical problems of privacy protection control for the space-ground integrated microgrid cluster. Compared with the prior art, the beneficial effects of the privacy protection control system for the space-ground integrated microgrid cluster provided in this application are the same as those of the privacy protection control method for the space-ground integrated microgrid cluster provided in the above embodiment, and other technical features in the privacy protection control system for the space-ground integrated microgrid cluster are the same as the features disclosed in the above embodiment method, and will not be elaborated here.

[0070] It should be understood that the above is only for illustration and does not constitute any limitation to the technical solution of the present invention. In specific applications, those skilled in the art can set according to needs, and the present invention does not limit this.

[0071] It should be noted that the above-described work process is only illustrative and does not limit the protection scope of the present invention. In actual applications, those skilled in the art can select some or all of them according to actual needs to achieve the purpose of the solution of this embodiment, and no limitation is made here.

[0072] In addition, for the technical details not described in detail in this embodiment, reference can be made to the privacy protection control method for the space-ground integrated microgrid cluster provided in any embodiment of the present invention, and details will not be repeated here.

[0073] It should be noted that, in this article, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or system comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or system. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or system comprising such element.

[0074] The serial numbers of the above embodiments of the present invention are only for description and do not represent the superiority or inferiority of the embodiments.

[0075] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-described embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as a read-only memory / random access memory, magnetic disk, optical disk) and includes several instructions for causing a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0076] The above are only the preferred embodiments of the present invention and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A privacy protection control method for a space-earth integrated microgrid cluster, characterized in that The privacy protection control method for the space-ground integrated microgrid cluster is applied to distributed generation devices in the space-ground integrated microgrid cluster. The microgrid cluster includes multiple distributed generation devices, and the distributed generation devices are sequentially communicatively connected to each other. The privacy protection control method for the space-ground integrated microgrid cluster includes: Construct a hybrid control model according to the device attribute information of the distributed generation device; Collect the current state information of the distributed generation device, and add a noise signal to the current state information to generate a first state signal; Send the first state signal to the neighbor generation device adjacent to the distributed generation device in the space-ground integrated microgrid cluster, and receive the second state signal sent by the neighbor generation device; Analyze the second state signal to obtain the device state information of the neighbor generation device; Input the current state information and the device state information into the hybrid control model to generate a control signal, and control the distributed generation device based on the control signal.

2. The privacy protection control method for the space-ground integrated microgrid cluster according to claim 1, characterized in that The hybrid control model includes a frequency control module and a power control module. The frequency control module includes: Among them, represents the frequency control input parameter, and represents the frequency control gain coefficient of the frequency control module, represents the actual output frequency parameter of the distributed generation equipment ; represents the frequency reference state variable of the frequency control module, represents the time node at the left limit of the frequency reference state variable, represents the th neighbor generation equipment at the left limit of the frequency state variable at the time node ; represents the time-varying control gain parameter, represents the set of neighbor generation equipment of the distributed generation, is the derivative of the frequency reference state variable ; represents the th time node, represents the set of non-negative integers, indicates that belongs to the non-negative integers; The power control module includes: Among them, represents the power control input parameter, and represent the power control gain coefficient of the power control module, represents the power droop coefficient of the distributed generation device ; represents the measured value of the active power output of the distributed generation device ; represents the power reference state quantity of the power control module, represents the time node at the left limit of the power reference state quantity, represents the th neighbor generation device at the left limit of the power state variable at the time node ; is the derivative of the power reference state quantity .

3. The privacy protection control method for the space-ground integrated microgrid cluster according to claim 2, wherein The step of constructing a hybrid control model according to the device attribute information of the distributed generation device includes: Determine a time-varying control gain parameter according to the device attribute information of the distributed generation device and a noise generation module; Among them, and are normal constants, is the gain adjustment coefficient, which is used to adjust the rate of change of the gain parameter over time, is the time-varying control gain parameter; Construct a hybrid control model based on the time-varying control gain parameter.

4. The privacy protection control method for the space-ground integrated microgrid cluster according to any one of claims 1 to 3, characterized in that The step of collecting the current state information of the distributed generation device, and adding a noise signal to the current state information to generate a first state signal includes: Collect the current state information of the distributed generation device, and generate an initial state signal based on the current state information. The initial state signal includes an initial frequency signal and an initial power signal; Construct a noise generation module, and add a noise signal to the initial state signal based on the noise generation module to generate a first state signal. The first state signal includes a frequency encrypted signal and a power encrypted signal: Among them, represents the frequency encryption signal of the distributed generation device ; represents the left limit of the time node ; represents the initial frequency signal of the distributed generation device ; represents the noise signal added to the initial frequency signal ; represents the initial power signal of the distributed generation device ; represents the power encryption signal of the distributed generation device ; indicates that the noise signal obeys the Laplace distribution with a noise mean of 0, is the scale parameter, represents the th time node in the time series ; represents belongs to the set of non - negative integers.

5. The privacy protection control method for the space-ground integrated microgrid cluster according to claim 4, characterized in that, The step of constructing the noise generation module includes: Construct a sensitivity function according to the time-varying control gain parameter of the hybrid control model; Determine a differential privacy coefficient based on the sensitivity function; Among them, represents the time node of the sensitivity function, represents the differential privacy coefficient, represents the scale parameter of the noise signal, is the total length of the time series; Construct a noise generation module according to the differential privacy coefficient.

6. The privacy protection control method for the space-ground integrated microgrid cluster according to any one of claims 1 to 3, characterized in that, The step of inputting the current state information and the device state information into the hybrid control model to generate a control signal, and controlling the distributed generation device based on the control signal includes: Construct a device control model for the distributed generation device. The device control model is an active power-frequency control model: Among them, is the actual frequency of the distributed generation device, is the expected frequency of the distributed generation device, is the power droop coefficient, is the measured value of the active power output of the distributed generation device, is the expected value of the active power output, is the filter time constant, represents the measured value of the active power output of the change rate, represents the active power output value of the distributed generation device; Input the current state information and the device state information into the hybrid control model to generate a control signal, and input the control signal into the device control model to control the distributed generation device.

7. A privacy protection control system for a space-earth integrated microgrid cluster, characterized in that, The privacy protection control system for the space-ground integrated microgrid cluster includes: A hybrid control module for constructing a hybrid control model according to the device attribute information of the distributed generation device; An information processing module, configured to collect the current status information of the distributed power generation device, add a noise signal to the current status information, and generate a first status signal; A signal transceiver module, configured to send the first status signal to a neighboring power generation device adjacent to the distributed power generation device in the space-ground integrated microgrid cluster, and receive a second status signal sent by the neighboring power generation device; A signal parsing module, configured to parse the second status signal to obtain the device status information of the neighboring power generation device; A device control module, configured to input the current status information and the device status information into the hybrid control model to generate a control signal, and control the distributed power generation device based on the control signal.

8. The privacy protection control system for the space-ground integrated microgrid cluster according to claim 7, wherein The hybrid control model includes a frequency control module and a power control module, and the frequency control module includes: Among them, represents the frequency control input parameter, and represents the frequency control gain coefficient of the frequency control module, represents the actual output frequency parameter of the distributed generation equipment ; represents the frequency reference state quantity of the frequency control module, represents the time node at the left limit of the frequency reference state quantity, represents the th neighbor generation equipment at the left limit of the frequency state variable at the time node ; represents the time-varying control gain parameter, represents the set of neighbor generation equipment of the distributed generation, is the derivative of the frequency reference state variable ; represents the th time node, represents the set of non-negative integers, indicates belongs to the non-negative integers; The power control module includes: Among them, represents the power control input parameter, and represents the power control gain coefficient of the power control module, represents the distributed generation device 's power droop coefficient, represents the distributed generation device 's measured active power output value, represents the power reference status quantity of the power control module, represents the time node 's power reference status quantity at the left limit, represents the th neighbor generation device's power status variable at the left limit of the time node ; is the derivative of the power reference status quantity .

9. The privacy protection control system for the space-ground integrated microgrid cluster according to claim 8, characterized in that The hybrid control module is further configured to determine a time-varying control gain parameter according to the device attribute information of the distributed power generation device and the noise generation module: Among them, and are normal constants, is the gain adjustment coefficient, which is used to adjust the rate of change of the gain parameter with time, is the time-varying control gain parameter; Construct a hybrid control model based on the time-varying control gain parameter.

10. The privacy protection control system for the space-ground integrated microgrid cluster according to any one of claims 7 to 9, characterized in that, The information processing module is further configured to collect the current status information of the distributed power generation device, and generate an initial status signal based on the current status information, where the initial status signal includes an initial frequency signal and an initial power signal; Construct a noise generation module, and add a noise signal to the initial status signal based on the noise generation module to generate a first status signal, where the first status signal includes a frequency encryption signal and a power encryption signal: Among them, represents the frequency encryption signal of the distributed generation device , represents the left limit of the time node , represents the initial frequency signal of the distributed generation device , represents the noise signal added to the initial frequency signal represents the initial power signal of the distributed generation device , represents the power encryption signal of the distributed generation device , represents the noise signal obeys the Laplace distribution, and the noise mean is 0 is the scale parameter represents the th time node in the time series represents the set of non-negative integers represents belongs to non-negative integers.

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