Variable frequency air conditioner control method and device for voltage regulation of power distribution network

Abstract

The invention provides a variable frequency air conditioner control method and device for voltage regulation of a power distribution network, and relates to the technical field of power control. The method comprises the following steps: acquiring active power change values, reactive power change values and distribution voltage values of a plurality of building units at a first moment; according to a plurality of active power change values, a plurality of reactive power change values, a plurality of preset active power voltage sensitivities, a plurality of preset reactive power voltage sensitivities, a first communication topology matrix and a power distribution voltage value of the target building unit at the first moment, obtaining a second communication topology matrix according to the plurality of active power change values, the plurality of reactive power change values, the plurality of preset active power voltage sensitivities; calculating a distribution voltage predicted value of the target building unit at a future moment after the first moment; and according to the distribution voltage predicted value of the target building unit at the future moment, controlling all variable frequency air conditioners in the target building unit at the future moment so as to carry out voltage regulation on the power distribution network. Therefore, by adjusting the voltage value of the variable frequency air conditioner, more renewable energy sources are absorbed for power generation, large-scale absorption of the renewable energy sources is promoted, and energy waste is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of power control, and in particular to a variable frequency air conditioner control method and device for voltage regulation in a distribution network. Background Art

[0002] As renewable energy generation technology continues to mature, more and more renewable energy sources are connected to the distribution network. However, renewable energy generation is characterized by instability and uncertainty. In a distribution network with high penetration of renewable energy generation, when renewable energy generation fluctuates drastically, the system reserve may not be able to quickly maintain system voltage stability.

[0003] With the advancement of information and communication technology, a large number of variable-frequency air conditioners can be aggregated by aggregators to form air conditioner clusters to provide auxiliary regulation services for the distribution network. Variable-frequency air conditioners provide auxiliary regulation services for the distribution network by changing the operating mode of the variable-frequency air conditioner, thereby changing the power output of the variable-frequency air conditioner and participating in the voltage regulation of the power system. Compared with traditional system reserve resources, aggregated variable-frequency air conditioners participating in the grid voltage regulation service have the characteristics of fast response speed. However, variable-frequency air conditioners have the characteristics of small capacity and large scale, which brings challenges to the aggregated regulation of variable-frequency air conditioners. In existing research, centralized control strategies will increase the communication burden of aggregators and cannot achieve refined control. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies in the above-mentioned prior art and provide a variable frequency air conditioning control method and device for power distribution network voltage regulation to solve the problems that the prior art cannot achieve refined control.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] In a first aspect, an embodiment of the present application provides a variable frequency air conditioner control method for distribution network voltage regulation, which is applied to any control device among multiple control devices in an air conditioning cluster, wherein the multiple control devices are respectively arranged in multiple building units, and each building unit is further provided with: at least one variable frequency air conditioner, the control device in each building unit is connected to the at least one variable frequency air conditioner, the multiple control devices are communicatively connected, and the multiple control devices are all communicatively connected to the aggregator control device, and the method includes:

[0007] Obtaining active power change values, reactive power change values, and distribution voltage values ​​of the multiple building units at a first moment, wherein the active power change value and reactive power change value of each building unit are respectively the total active power change value and the total reactive power change value of all variable frequency air conditioners in each building unit;

[0008] According to a plurality of active power change values, a plurality of reactive power change values, a plurality of preset active power voltage sensitivities, a plurality of preset reactive power voltage sensitivities, a first communication topology matrix, and a distribution voltage value of a target building unit at the first moment, a distribution voltage prediction value of the target building unit at a future moment after the first moment is calculated; wherein the plurality of preset active power voltage sensitivities are respectively voltage sensitivities of active power in the plurality of building units, the plurality of preset reactive power voltage sensitivities are respectively voltage sensitivities of reactive power in the plurality of building units, and the first communication topology matrix is ​​used to characterize the communication topology relationship of the plurality of control devices;

[0009] According to the predicted value of the power distribution voltage of the target building unit at the future moment, all variable frequency air conditioners in the target building unit are controlled at the future moment to adjust the voltage of the distribution network.

[0010] Optionally, the power distribution voltage value of the target building unit at the first moment is an actual value of the power distribution voltage, or a predicted value of the power distribution voltage.

[0011] Optionally, if the distribution voltage value of the target building unit at the first moment is a distribution voltage prediction value, before obtaining the active power change values, reactive power change values ​​and distribution voltage values ​​of the multiple building units at the first moment, the method further includes:

[0012] Acquire active power change values, reactive power change values, and distribution voltage values ​​of the multiple building units at historical moments before the first moment;

[0013] According to the multiple active power change values, the multiple reactive power change values, the multiple preset active power voltage sensitivities, the multiple preset reactive power voltage sensitivities, the first communication topology matrix and the distribution voltage value of the target building unit at the historical moment, the distribution voltage prediction value of the target building unit at the first moment is calculated.

[0014] Optionally, the acquiring the active power change values ​​and reactive power change values ​​of the plurality of building units at the first moment includes:

[0015] Acquire the active power and reactive power of the multiple building units at a moment before the first moment, and the active power and reactive power of the multiple building units at the first moment;

[0016] According to the active power and reactive power of the multiple building units at a moment before the first moment, and the active power and reactive power of the multiple building units at the first moment, the active power change value and reactive power change value of the multiple building units at the first moment are calculated respectively.

[0017] Optionally, before controlling all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment, the method further includes:

[0018] Calculating the distribution voltage fluctuation ratio at the future moment according to the distribution voltage prediction value of the target building unit at the future moment and the preset distribution voltage reference value;

[0019] The controlling of all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment comprises:

[0020] If the power distribution voltage fluctuation ratio at the future time satisfies the preset voltage fluctuation range, all variable frequency air conditioners in the target building unit at the future time are controlled according to the power distribution voltage prediction value of the target building unit at the future time.

[0021] Optionally, before controlling all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment, the method further includes:

[0022] Calculate the active power and reactive power of the target building unit at the future time according to the predicted value of the distribution voltage of the target building unit at the future time;

[0023] The controlling of all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment comprises:

[0024] If the active power and reactive power of the target building unit at the future moment meet the corresponding preset power ranges respectively, all variable frequency air conditioners in the target building unit at the future moment are controlled according to the predicted value of the distribution voltage of the target building unit at the future moment.

[0025] Optionally, before controlling all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment, the method further includes:

[0026] Receive the active power adjustment signal and reactive power adjustment signal of the air conditioner aggregator at the first moment sent by the aggregator control device; wherein, the active power adjustment signal of the air conditioner aggregator at the first moment is calculated by the aggregator control device according to the state values ​​of multiple variable-frequency air conditioners at the first moment, the second communication topology matrix, the active power trigger function of the air conditioner aggregator at the first moment, the active power control signal, the active power control coefficient, and the active power change value; the reactive power adjustment signal of the air conditioner aggregator at the first moment is calculated by the aggregator control device according to the state values ​​of the multiple variable-frequency air conditioners at the first moment, the second communication topology matrix, the reactive power trigger function, the reactive power control signal, the reactive power control coefficient, and the reactive power change value of the air conditioner aggregator at the first moment; the second communication topology matrix is ​​used to characterize the communication topology relationship of the multiple variable-frequency air conditioners;

[0027] The controlling of all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment comprises:

[0028] According to the distribution voltage prediction value of the target building unit at the future moment, the active power regulation signal of the air conditioning aggregator at the first moment, and the reactive power regulation signal of the air conditioning aggregator at the first moment, all variable frequency air conditioners in the target building unit are controlled at the future moment.

[0029] Optionally, before receiving the active power adjustment signal and the reactive power adjustment signal of the air conditioning aggregator at the first moment sent by the aggregator control device, the method further includes:

[0030] The state values ​​of the multiple variable frequency air conditioners at the first moment are updated according to the state values ​​of the multiple variable frequency air conditioners at the first moment, the second communication topology matrix, and the coupling strength.

[0031] Optionally, before controlling all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment, the method further includes:

[0032] According to the voltage prediction value and the voltage reference value of the target building unit at the future moment, determining whether the voltage prediction value of the target building unit meets a preset grid voltage range;

[0033] The controlling of all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment comprises:

[0034] If the voltage fluctuation ratio satisfies the preset voltage fluctuation range, and the voltage prediction value of the target building unit satisfies the preset grid voltage range, all variable frequency air conditioners in the target building unit are controlled at the future time according to the distribution voltage prediction value of the target building unit at the future time.

[0035] In a second aspect, an embodiment of the present application provides a control device, comprising: a processor and a storage medium, wherein the processor and the storage medium are connected to each other via a bus communication, the storage medium stores program instructions executable by the processor, and the processor calls the program stored in the storage medium to execute the steps of the variable frequency air conditioning control method for distribution network voltage regulation as described in any one of the first aspects.

[0036] Compared with the prior art, this application has the following beneficial effects:

[0037] The present application provides a variable frequency air conditioner control method and device for voltage regulation of a distribution network. The method obtains active power change values, reactive power change values ​​and distribution voltage values ​​of multiple building units at a first moment, wherein the active power change value and reactive power change value of each building unit are respectively the total active power change value and the total reactive power change value of all variable frequency air conditioners in each building unit; according to the multiple active power change values, multiple reactive power change values, multiple preset active power voltage sensitivities, multiple preset reactive power voltage sensitivities, a first communication topology matrix and the distribution voltage value of the target building unit at the first moment, calculate the distribution voltage prediction value of the target building unit at a future moment after the first moment; wherein the multiple preset active power voltage sensitivities are respectively the voltage sensitivities of the active power in the multiple building units, the multiple preset reactive power voltage sensitivities are respectively the voltage sensitivities of the reactive power in the multiple building units, and the first communication topology matrix is ​​used to characterize the communication topology relationship of multiple control devices; according to the distribution voltage prediction value of the target building unit at the future moment, all variable frequency air conditioners in the target building unit are controlled at the future moment to regulate the voltage of the distribution network. Therefore, by adopting the variable frequency characteristics of the variable frequency air conditioner and adjusting the voltage value of the variable frequency air conditioner, refined control can be achieved. No matter how the output voltage of the distribution network changes, the voltage value of the variable frequency air conditioner can be kept unchanged. When the voltage of the distribution network changes, more renewable energy generation can be absorbed, which promotes the large-scale consumption of renewable energy and avoids energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 A schematic diagram of an air conditioning cluster provided for this application;

[0040] Figure 2 A flow chart of a variable frequency air conditioning control method for distribution network voltage regulation provided in this application;

[0041] Figure 3 A flow chart of a method for calculating a distribution voltage prediction value of a target building unit at a first moment based on a distribution voltage prediction value provided in an embodiment of the present application;

[0042] Figure 4 A flowchart of a method for calculating an active power change value and a reactive power change value provided in an embodiment of the present application;

[0043] Figure 5 A flow chart of another variable frequency air conditioner control method for power distribution network voltage regulation provided in an embodiment of the present application;

[0044] Figure 6 A flow chart of another variable frequency air conditioner control method for voltage regulation of a distribution network provided in an embodiment of the present application;

[0045] Figure 7 A flow chart of another variable frequency air conditioner control method for voltage regulation of a distribution network provided in an embodiment of the present application;

[0046] Figure 8 A flow chart of another variable frequency air conditioner control method for voltage regulation of a distribution network provided in an embodiment of the present application;

[0047] Fig. 9 A schematic diagram of a variable frequency air conditioning control device for power distribution network voltage regulation provided in an embodiment of the present application;

[0048] Fig.10 A schematic diagram of a control device provided in an embodiment of the present application.

[0049] Icon: 1-control device, 2-inverter air conditioner, 901-acquisition module, 902-calculation module, 903-control module, 1001-processor, 1002-storage medium. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0053] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0054] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0055] The following is an explanation of an air conditioning cluster provided in the present application through a specific example. Figure 1 A schematic diagram of an air conditioning cluster provided in this application. Figure 1 As shown, the air conditioning cluster includes: multiple control devices 1 and multiple variable frequency air conditioners 2.

[0056] A plurality of control devices 1 in the air-conditioning cluster are respectively arranged in a plurality of building units, and each control device 1 is correspondingly arranged in one building unit.

[0057] Each building unit is also provided with: at least one variable frequency air conditioner 2; the control device 1 in each building unit is connected to at least one variable frequency air conditioner 2; the multiple control devices 1 are communicatively connected to each other; and the multiple control devices 1 are communicatively connected to the aggregator control device 3.

[0058] Figure 1 In the example, the control devices 1 between adjacent building units are connected to each other, and the control devices 1 between non-adjacent building units are not connected. Specifically, each control device 1 is connected to a corresponding gateway device, and each gateway device is connected to the aggregator control device 3 in communication, so as to realize the communication connection between each control device 1 and the aggregator. The communication connection between two gateway devices realizes the communication connection between two control devices 1.

[0059] Each control device 1 can obtain the relevant electrical control parameters of all variable-frequency air conditioners 2 in the corresponding building unit, and can also obtain the relevant electrical control parameters of all variable-frequency air conditioners 2 in other building units with communication connections, and can control the distribution network to supply power to all variable-frequency air conditioners 2 in the corresponding building unit.

[0060] For example, Figure 1 There are 40 building units, corresponding to 40 gateway devices. Building 31 is connected to adjacent buildings 21 and 32 through gateway communication, and the control device in building 31 can obtain electrical signals from buildings 21 and 32. Building 31 is connected to aggregator control device 3 through gateway communication, and can transmit signals to and from aggregator control device 3. Aggregator control device 3 can also detect the voltage of the distribution bus.

[0061] By way of example, the control device 1 is an MPC controller.

[0062] The following is an explanation of a variable frequency air conditioning control method for distribution network voltage regulation provided in the present application through a specific example. Figure 2 The present application provides a flow chart of a variable frequency air conditioner control method for voltage regulation of a distribution network. The execution subject of the method is any control device among multiple control devices in an air conditioner cluster, and the control device has a computing and processing function. Figure 2 As shown, the method includes:

[0063] S101. Obtain active power change values, reactive power change values, and distribution voltage values ​​of multiple building units at a first moment.

[0064] The active power change value and reactive power change value of each building unit are respectively the total active power change value and total reactive power change value of all variable frequency air conditioners in each building unit.

[0065] For example, the voltage regulation method provided in the present application predicts the electrical parameters at a time after the current time based on the electrical parameters at the current time. Therefore, the first time is the current time.

[0066] S102. Calculate a predicted distribution voltage value of a target building unit at a future moment after the first moment based on multiple active power change values, multiple reactive power change values, multiple preset active power voltage sensitivities, multiple preset reactive power voltage sensitivities, a first communication topology matrix, and a distribution voltage value of the target building unit at the first moment.

[0067] Among them, multiple preset active power voltage sensitivities are respectively the voltage sensitivities of active power in multiple building units, multiple preset reactive power voltage sensitivities are respectively the voltage sensitivities of reactive power in multiple building units, and the first communication topology matrix is ​​used to characterize the communication topology relationship of multiple control devices.

[0068] The distribution voltage prediction value of the target building unit at the future moment after the first moment is calculated as shown in the following formula (1):

[0069] x i (t+1)=x i (t)+B i u i (t) (1)

[0070] in,

[0071] Among them, V i (t) is the distribution voltage value of building unit i (target building unit at the first moment) at time t; and are respectively the preset active power voltage sensitivity and the preset reactive power voltage sensitivity of building i (target building unit); and are the active power change and reactive power change of building i at time t, respectively, i (t+1) is the predicted value of the distribution voltage of building unit i at time t+1 (the target building unit at a future time after the first time).

[0072] Based on formula (1), in the process of voltage regulation, the topological relationship between building units can also be considered to finally achieve voltage regulation in the entire distribution network.

[0073] The specific calculation method of the distribution voltage prediction value is shown in the following formula (2):

[0074]

[0075] Among them, Represents the relationship between building unit i and building unit The communication topology relationship between them can be obtained from the first communication topology matrix.

[0076] The first communication topology matrix and the second communication topology matrix in the following embodiments are specifically shown as follows.

[0077] in, represents the active power provided by the jth variable frequency air conditioner in building unit i; Represents the reactive power provided by the jth variable frequency air conditioner in building unit i. The air conditioners in the building unit are aggregated through the Internet of Things gateway. In the embodiment of the present application, there are topologies between variable frequency air conditioners. and the topology between building units in, Indicates variable frequency air conditioning node; Represents a building unit node; represents the connections between variable frequency air conditioners (i.e., the second communication topology matrix); Represents the connection between building units (i.e., the first communication topology matrix). The specific topology matrix is ​​defined as shown in the following formula (3):

[0078]

[0079] in, Indicates variable frequency air conditioner (ij) and variable frequency air conditioner The relationship between is an element in the second communication topology matrix; Indicates building unit i and building unit The relationship between is an element in the first communication topology matrix.

[0080] The target building unit is controlled based on a distributed consistency algorithm. On the basis of the topological relationship of the target building unit, the voltage of the target building unit is gradually stabilized, and the voltage regulation effect of the entire air-conditioning cluster is finally achieved. The distribution voltage of the target building unit is successfully predicted.

[0081] S103. According to the predicted value of the power distribution voltage of the target building unit at a future time, all variable frequency air conditioners in the target building unit are controlled at a future time to adjust the voltage of the distribution network.

[0082] The calculated distribution voltage prediction value not only takes into account the distribution voltage value at the first moment, but also comprehensively considers the active power and reactive power of other building units.

[0083] The method provided in this application is used to perform aggregate control on variable-frequency air conditioners to provide voltage regulation services for the distribution network. To achieve collaborative control of variable-frequency air conditioners between multiple building units in a complex distribution network. During the voltage regulation process, only the voltage of some building units (target building units) is adjusted. The building units achieve information interaction through topological connections, and ultimately achieve the effect of voltage regulation of the entire air-conditioning cluster. The air-conditioning cluster based on the decentralized characteristics of distributed consistency consensus processing can reduce the communication cost of the air-conditioning aggregators of the air-conditioning cluster. Compared with centralized control, it can reduce the communication burden of air-conditioning aggregators and improve the data privacy protection of the system; distributed control can better achieve collaboration and cluster control between variable-frequency air conditioners, improving the intelligence and regulation efficiency of the system.

[0084] Therefore, by adopting the variable frequency characteristics of the variable frequency air conditioner and adjusting the voltage value of the variable frequency air conditioner, distributed control can be achieved. No matter how the output voltage of the distribution network changes, the voltage value of the variable frequency air conditioner can be kept unchanged. When the voltage of the distribution network changes, more renewable energy generation can be absorbed, which promotes the large-scale consumption of renewable energy and avoids energy waste.

[0085] In summary, in this embodiment, the active power change values, reactive power change values ​​and distribution voltage values ​​of multiple building units at the first moment are obtained, wherein the active power change value and reactive power change value of each building unit are respectively the total active power change value and the total reactive power change value of all variable frequency air conditioners in each building unit; according to the multiple active power change values, multiple reactive power change values, multiple preset active power voltage sensitivities, multiple preset reactive power voltage sensitivities, the first communication topology matrix and the distribution voltage value of the target building unit at the first moment, the distribution voltage prediction value of the target building unit at the future moment after the first moment is calculated; wherein the multiple preset active power voltage sensitivities are respectively the voltage sensitivities of the active power in the multiple building units, the multiple preset reactive power voltage sensitivities are respectively the voltage sensitivities of the reactive power in the multiple building units, and the first communication topology matrix is ​​used to characterize the communication topology relationship of multiple control devices; according to the distribution voltage prediction value of the target building unit at the future moment, all variable frequency air conditioners in the target building unit are controlled at the future moment to adjust the voltage of the distribution network. Therefore, by adopting the variable frequency characteristics of the variable frequency air conditioner and adjusting the voltage value of the variable frequency air conditioner, distributed control can be achieved. No matter how the output voltage of the distribution network changes, the voltage value of the variable frequency air conditioner can be kept unchanged. When the voltage of the distribution network changes, more renewable energy generation can be absorbed, which promotes the large-scale consumption of renewable energy and avoids energy waste.

[0086] In the above Figure 2On the basis of the corresponding embodiment, in another embodiment of the present application, the power distribution voltage value of the target building unit at the first moment is the actual value of the power distribution voltage, or the predicted value of the power distribution voltage.

[0087] The distribution voltage value of the target building unit at the first moment is the actual distribution voltage value, which can predict the distribution voltage predicted value at the future moment based on the actual distribution voltage value at the current moment.

[0088] The distribution voltage value of the target building unit at the first moment is the distribution voltage prediction value, which can be used to predict the distribution voltage prediction value at a future moment based on the distribution voltage prediction value at the current moment.

[0089] On the basis of the above-mentioned embodiments, the embodiments of the present application further provide a method for calculating a distribution voltage prediction value of a target building unit at a first moment based on the distribution voltage prediction value. Figure 3 A flow chart of a method for calculating a distribution voltage prediction value of a target building unit at a first moment based on a distribution voltage prediction value provided in an embodiment of the present application. Figure 3 As shown, if the distribution voltage value of the target building unit at the first moment is the distribution voltage prediction value, before obtaining the active power change values, reactive power change values ​​and distribution voltage values ​​of multiple building units at the first moment in S101, the method further includes:

[0090] S201. Obtain active power change values, reactive power change values, and distribution voltage values ​​of multiple building units at historical moments before a first moment.

[0091] S202. Calculate the predicted value of the distribution voltage of the target building unit at the first moment based on multiple active power change values, multiple reactive power change values, multiple preset active power voltage sensitivities, multiple preset reactive power voltage sensitivities, the second communication topology matrix, and the distribution voltage value of the target building unit at the historical moment.

[0092] For example, the power distribution voltage prediction value of the target building unit at the first moment may be calculated based on the previous historical moment, or the power distribution voltage prediction value of the target building unit at the first moment may be calculated sequentially based on a previous historical moment.

[0093] Specifically, the calculation of the distribution voltage prediction value of building unit i from time t to time t+p is taken as an example for explanation, and the calculation method is shown in the following formula (4):

[0094]

[0095] where u i (t+p|t) represents the control input predicted at time t+p; x i(t+p|t) represents the distribution voltage predicted at time t+p. The above formula (4) can be simplified to the following formula (5):

[0096]

[0097]

[0098] In summary, in this embodiment, if the distribution voltage value of the target building unit at the first moment is the distribution voltage prediction value, the active power change value, reactive power change value and distribution voltage value of multiple building units at the historical moment before the first moment are obtained; according to the multiple active power change values, multiple reactive power change values, multiple preset active power voltage sensitivities, multiple preset reactive power voltage sensitivities, the second communication topology matrix and the distribution voltage value of the target building unit at the historical moment, the distribution voltage prediction value of the target building unit at the first moment is calculated. Thus, the distribution voltage at the first moment is accurately predicted by the distribution voltage prediction value at the historical moment.

[0099] Based on the above embodiments, the embodiments of the present application also provide a method for calculating the active power change value and the reactive power change value. Figure 4 A flow chart of a method for calculating active power change value and reactive power change value provided in an embodiment of the present application. Figure 4 As shown, obtaining active power change values ​​and reactive power change values ​​of multiple building units at a first moment in S101 includes:

[0100] S301. Obtain active power and reactive power of multiple building units at a moment before a first moment, and active power and reactive power of multiple building units at the first moment.

[0101] The active power of each building unit is the sum of the active powers of all variable frequency air conditioners in the building unit, and the reactive power of each building unit is the sum of the reactive powers of all variable frequency air conditioners in the building unit.

[0102] S302. Calculate active power change values ​​and reactive power change values ​​of the multiple building units at the first moment according to the active power and reactive power of the multiple building units at a moment before the first moment and the active power and reactive power of the multiple building units at the first moment.

[0103] The difference between the active power at the first moment and the active power at the moment before the first moment is taken as the active power change value. The difference between the reactive power at the first moment and the reactive power at the moment before the first moment is taken as the active power change value.

[0104] In summary, in this embodiment, the active power and reactive power of multiple building units at a moment before the first moment, and the active power and reactive power of multiple building units at the first moment are obtained; according to the active power and reactive power of multiple building units at a moment before the first moment, and the active power and reactive power of multiple building units at the first moment, the active power change value and reactive power change value of multiple building units at the first moment are calculated respectively. Thus, the active power change value and reactive power change value are accurately calculated.

[0105] Based on the above embodiments, the embodiments of the present application also provide another method for variable frequency air conditioning control method for distribution network voltage regulation. Figure 5 A flow chart of another variable frequency air conditioning control method for power distribution network voltage regulation provided in an embodiment of the present application. Figure 5 As shown, in S103, based on the predicted value of the power distribution voltage of the target building unit at the future moment, before controlling all variable frequency air conditioners in the target building unit at the future moment, the method further includes:

[0106] S401. Calculate the distribution voltage fluctuation ratio at a future time according to the distribution voltage prediction value of the target building unit at a future time and the preset distribution voltage reference value.

[0107] For example, the ratio of the distribution voltage prediction value to the preset distribution voltage reference value is used as the distribution voltage fluctuation ratio.

[0108] In S103, all variable frequency air conditioners in the target building unit are controlled at the future time according to the predicted value of the power distribution voltage of the target building unit at the future time, including:

[0109] S402: If the power distribution voltage fluctuation ratio at the future moment satisfies the preset voltage fluctuation range, all variable frequency air conditioners in the target building unit are controlled at the future moment according to the power distribution voltage prediction value of the target building unit at the future moment.

[0110] For example, the preset voltage fluctuation range is [0.95, 1.05]. Thus, by performing voltage limitation, the voltage safety of all variable frequency air conditioners in each building unit is ensured.

[0111] Furthermore, if the distribution voltage fluctuation ratio at a future moment is less than the minimum value of the preset voltage fluctuation range, the distribution voltage prediction value at a future moment is adjusted to the minimum value of the preset voltage fluctuation range. If the distribution voltage fluctuation ratio at a future moment is greater than the maximum value of the preset voltage fluctuation range, the distribution voltage prediction value at a future moment is adjusted to the maximum value of the preset voltage fluctuation range to meet voltage safety.

[0112] In summary, in this embodiment, the power distribution voltage fluctuation ratio at the future moment is calculated according to the power distribution voltage prediction value and the preset power distribution voltage reference value of the target building unit at the future moment; if the power distribution voltage fluctuation ratio at the future moment satisfies the preset voltage fluctuation range, all variable frequency air conditioners in the target building unit are controlled at the future moment according to the power distribution voltage prediction value of the target building unit at the future moment. Thus, by performing voltage limitation, the voltage safety of all variable frequency air conditioners in each building unit is ensured.

[0113] On the basis of the above-mentioned embodiments, the embodiments of the present application further provide a method for controlling a variable frequency air conditioner for voltage regulation in a distribution network. Figure 6 A flow chart of another variable frequency air conditioner control method for voltage regulation of a distribution network provided in an embodiment of the present application. Figure 6 As shown, in S103, based on the predicted value of the power distribution voltage of the target building unit at the future moment, before controlling all variable frequency air conditioners in the target building unit at the future moment, the method further includes:

[0114] S501. Calculate the active power and reactive power of the target building unit at the future time according to the predicted value of the distribution voltage of the target building unit at the future time.

[0115] Active power and reactive power are calculated by using the predicted value of the distribution voltage and the operating parameters of all variable frequency air conditioners in the target building unit. This calculation method is a prior art and will not be described in detail here.

[0116] In S103, all variable frequency air conditioners in the target building unit are controlled at the future time according to the predicted value of the power distribution voltage of the target building unit at the future time, including:

[0117] S502: If the active power and reactive power of the target building unit at the future moment meet the corresponding preset power ranges, all variable frequency air conditioners in the target building unit are controlled at the future moment according to the predicted value of the distribution voltage of the target building unit at the future moment.

[0118] For example, the preset power range is shown in the following formula (6):

[0119]

[0120] in, and are the active power and reactive power of all variable frequency air conditioners in building unit i, and are the rated active power and rated reactive power of all variable frequency air conditioners in building unit i. By setting the preset power range, the safe operation of the variable frequency air conditioner is ensured.

[0121] In summary, in this embodiment, the active power and reactive power of the target building unit at the future moment are calculated according to the distribution voltage prediction value of the target building unit at the future moment; if the active power and reactive power of the target building unit at the future moment meet the corresponding preset power ranges, all variable frequency air conditioners in the target building unit are controlled at the future moment according to the distribution voltage prediction value of the target building unit at the future moment. Thus, by setting the preset power range, the operation safety of the variable frequency air conditioner is ensured.

[0122] On the basis of the above-mentioned embodiments, the embodiments of the present application further provide a method for controlling a variable frequency air conditioner for voltage regulation in a distribution network. Figure 7 A flow chart of another variable frequency air conditioner control method for voltage regulation of a distribution network provided in the embodiment of the present application is provided. Figure 7 As shown, in S103, based on the predicted value of the power distribution voltage of the target building unit at the future moment, before controlling all variable frequency air conditioners in the target building unit at the future moment, the method further includes:

[0123] S601, receiving an active power adjustment signal and a reactive power adjustment signal of an air conditioning aggregator at a first moment sent by an aggregator control device.

[0124] Among them, the active power adjustment signal of the air conditioning aggregator at the first moment is calculated by the aggregator control device based on the state values ​​of multiple variable frequency air conditioners at the first moment, the second communication topology matrix, the active power trigger function of the air conditioning aggregator at the first moment, the active power control signal, the active power control coefficient, and the active power change value.

[0125] The reactive power regulation signal of the air conditioning aggregator at the first moment is calculated by the aggregator control device based on the state values ​​of multiple variable frequency air conditioners at the first moment, the second communication topology matrix, the reactive power trigger function of the air conditioning aggregator at the first moment, the reactive power control signal, the reactive power control coefficient, and the reactive power change value.

[0126] The second communication topology matrix is ​​used to characterize the communication topology relationship of multiple variable frequency air conditioners.

[0127] Specifically, the active power regulation signal and reactive power regulation signal of the air conditioning aggregator at the first moment can be calculated by the following formula (7):

[0128]

[0129] Among them, c p (t) and c q (t) are active power trigger function and reactive power trigger function, respectively, which decide whether to send power adjustment signal; β p and β qThey are active power control coefficient and reactive power control coefficient respectively; ΔP Grid is the active power change value (the sum of active power changes of all variable frequency air conditioners under the aggregator), ΔQ Grid is the reactive power change value (the sum of reactive power changes of all variable frequency air conditioners under the aggregator); is the active power regulation signal and reactive power regulation signal of the air conditioning aggregator at the first moment; r p (t), r q (t) is the active power control signal and reactive power control signal of the air conditioning aggregator at the first moment, s ij (t) is the state value at the first moment.

[0130] Among them, c p (t) and c q (t) is as shown in the following formula (8):

[0131]

[0132] Among them, P thr and Q thr They are the allowable disturbance constraint values ​​of active power and reactive power of air-conditioning aggregators respectively.

[0133] Specifically, the aggregator control device detects the voltage of the distribution bus, and determines the power of the subordinate variable frequency air conditioner that needs to be adjusted according to the voltage of the distribution bus. Then the aggregator control device determines the active power adjustment signal and reactive power adjustment signal of the air conditioner aggregator at the first moment according to the above method. The aggregator control device sends the active power adjustment signal and reactive power adjustment signal of the air conditioner aggregator at the first moment to the control devices of some building units (target building units).

[0134] In S103, all variable frequency air conditioners in the target building unit are controlled at the future time according to the predicted value of the power distribution voltage of the target building unit at the future time, including:

[0135] S602. Control all variable frequency air conditioners in the target building unit at the future moment according to the distribution voltage prediction value of the target building unit at the future moment, the active power adjustment signal of the air conditioner aggregator at the first moment, and the reactive power adjustment signal of the air conditioner aggregator at the first moment.

[0136] In addition to using the distribution voltage prediction value of the target building unit at a future moment to control all variable frequency air conditioners in the target building unit, the control of active power adjustment value and reactive power adjustment value is added to make the control of the variable frequency air conditioner more precise.

[0137] Specifically, the control device receives the active power adjustment signal and reactive power adjustment signal of the air conditioning aggregator at the first moment, and performs distributed control processing in combination with the electrical signals (voltage, active power, reactive power) of the adjacent building units to obtain the air conditioning power (active power, reactive power) that needs to be adjusted in the target building unit. Based on the distributed consistency algorithm, the control device obtains the signal adjustment value (active power, reactive power) that needs to be adjusted for each variable frequency air conditioner inside the target building unit. As the control proceeds, the power gradually becomes stable and consistent. Finally, multiple control devices are used to control the corresponding multiple variable frequency air conditioners to achieve the adjustment target that the control device of the aggregator needs to achieve.

[0138] In summary, in this embodiment, the active power adjustment signal and reactive power adjustment signal of the air conditioner aggregator at the first moment sent by the aggregator control device are received; wherein, the active power adjustment signal of the air conditioner aggregator at the first moment is calculated by the aggregator control device according to the state values ​​of multiple variable frequency air conditioners at the first moment, the second communication topology matrix, the active power trigger function of the air conditioner aggregator at the first moment, the active power control signal, the active power control coefficient, and the active power change value; the reactive power adjustment signal of the air conditioner aggregator at the first moment is calculated by the aggregator control device according to the state values ​​of multiple variable frequency air conditioners at the first moment, the second communication topology matrix, the reactive power trigger function of the air conditioner aggregator at the first moment, the reactive power control signal, the reactive power control coefficient, and the reactive power change value; according to the distribution voltage prediction value of the target building unit at the future moment, the active power adjustment signal of the air conditioner aggregator at the first moment, and the reactive power adjustment signal of the air conditioner aggregator at the first moment, all variable frequency air conditioners in the target building unit are controlled at the future moment. Thus, the control of the variable frequency air conditioner is more accurate.

[0139] On the basis of the above embodiment, in another embodiment of the present application, before receiving the active power adjustment signal and the reactive power adjustment signal of the air conditioning aggregator at the first moment sent by the aggregator control device in S601, the method further includes:

[0140] The state values ​​of the multiple variable frequency air conditioners at the first moment are updated according to the state values ​​of the multiple variable frequency air conditioners at the first moment, the second communication topology matrix, and the coupling strength.

[0141] The specific calculation method is as follows:

[0142]

[0143] in, For variable frequency air conditioner (ij) and variable frequency air conditioner The coupling strength between For variable frequency air conditioner (ij) and variable frequency air conditioner The elements in the second communication topology matrix corresponding to each other, is the state value at the first moment, is the state change value at the first moment.

[0144] The state values ​​of the plurality of variable frequency air conditioners at the first moment are updated based on the state value change value at the first moment. Specifically, the state value change value at the first moment is added to the state value at the first moment to obtain an updated state value.

[0145] The control method based on distributed consistency consensus can ensure that the control strategies of all variable-frequency air conditioners are consistent. This strategy realizes information exchange between adjacent and interconnected variable-frequency air conditioners. That is, the state value of the target variable-frequency air conditioner at the first moment is predicted by the state values ​​of multiple other variable-frequency air conditioners at historical moments. Therefore, the state of all variable-frequency air conditioners is comprehensively considered, and the state prediction accuracy is improved.

[0146] Furthermore, the state value of the variable frequency air conditioner s=[s 11 ,s 12 ,...s ij ,...s MN ] is defined as shown in the following formula (10):

[0147]

[0148] in, is the initial operating frequency of the jth variable frequency air conditioner in building unit i; is the upper limit of the frequency of the jth variable frequency air conditioner in building i; is the lower limit of the frequency of the jth variable frequency air conditioner in building i; and Depends on the characteristics of the inverter air conditioner. is the current operating frequency of the jth variable frequency air conditioner in building i,

[0149] In summary, in this embodiment, the state values ​​of the multiple variable frequency air conditioners at the first moment are updated according to the state values ​​of the multiple variable frequency air conditioners at the first moment, the second communication topology matrix, and the coupling strength. Thus, the state values ​​of the variable frequency air conditioners are accurately calculated. Thus, the state prediction accuracy is improved by comprehensively considering the states of all variable frequency air conditioners.

[0150] On the basis of the above-mentioned embodiments, the embodiments of the present application further provide a method for controlling a variable frequency air conditioner for voltage regulation of a distribution network. Figure 8 A flow chart of another variable frequency air conditioner control method for voltage regulation of a distribution network provided in an embodiment of the present application. Figure 8 As shown, in S103, according to the predicted value of the power distribution voltage of the target building unit at the future moment, before controlling all variable frequency air conditioners in the target building unit at the future moment, the method further includes:

[0151] S701. According to the voltage prediction value and voltage reference value of the target building unit at a future moment, determine whether the voltage prediction value of the target building unit meets a preset grid voltage range.

[0152] For example, the objective function of the optimization process of the building unit i can be designed, and the objective function is shown in the following formula (11):

[0153]

[0154]

[0155]

[0156] Among them, Q i is the positive definite coefficient matrix of building unit i; is the reference voltage of building i from time t to time t+p.

[0157] If the calculated objective function value is less than the preset value, the voltage prediction value of the target building unit satisfies the preset grid voltage range.

[0158] If the calculated objective function value is greater than or equal to the preset value, the voltage prediction value of the target building unit is adjusted down until the voltage prediction value of the target building unit meets the preset grid voltage range.

[0159] In S103, all variable frequency air conditioners in the target building unit are controlled at the future time according to the predicted value of the power distribution voltage of the target building unit at the future time, including:

[0160] S702: If the voltage fluctuation ratio satisfies the preset voltage fluctuation range, and the voltage prediction value of the target building unit satisfies the preset grid voltage range, all variable frequency air conditioners in the target building unit are controlled at the future time according to the distribution voltage prediction value of the target building unit at the future time.

[0161] Thus, by limiting the voltage of all building units, the voltage safety of all variable frequency air conditioners in the entire distribution network is ensured.

[0162] In summary, in this embodiment, according to the voltage prediction value and voltage reference value of the target building unit at the future moment, it is judged whether the voltage prediction value of the target building unit meets the preset grid voltage range; if the voltage fluctuation ratio meets the preset voltage fluctuation range, and the voltage prediction value of the target building unit meets the preset grid voltage range, then according to the distribution voltage prediction value of the target building unit at the future moment, all variable frequency air conditioners in the target building unit are controlled at the future moment. Thus, by limiting the voltage of all building units, the voltage safety of all variable frequency air conditioners in the entire distribution network is ensured.

[0163] Based on the above embodiment, in another embodiment of the present application, before controlling all variable frequency air conditioners in the target building unit at the future moment according to the distribution voltage prediction value of the target building unit at the future moment in S103, the following is further included:

[0164] Get the room temperature of the room where the inverter air conditioner is located.

[0165] In S103, all variable frequency air conditioners in the target building unit are controlled at the future time according to the predicted value of the power distribution voltage of the target building unit at the future time, including:

[0166] If the room temperature meets the preset temperature range, all variable frequency air conditioners in the target building unit will be controlled at the future time according to the predicted value of the power distribution voltage of the target building unit at the future time.

[0167] If the room temperature meets the preset temperature range, the predicted value of the distribution voltage of the target building unit at the future time is adjusted, and all variable frequency air conditioners in the target building unit are controlled at the future time to make the room temperature meet the preset temperature range.

[0168] Thus, user comfort during voltage regulation is guaranteed.

[0169] The following is a description of a variable frequency air conditioning control device, equipment and storage medium for distribution network voltage regulation provided by the present application. The specific implementation process and technical effects are described above and will not be repeated below.

[0170] Fig. 9 A schematic diagram of a variable frequency air conditioning control device for power distribution network voltage regulation provided in an embodiment of the present application, such as Fig. 9 As shown, the device comprises:

[0171] The acquisition module 901 is used to obtain the active power change value, reactive power change value and distribution voltage value of multiple building units at the first moment; wherein the active power change value and reactive power change value of each building unit are respectively the total active power change value and total reactive power change value of all variable frequency air conditioners in each building unit.

[0172] The calculation module 902 is used to calculate the distribution voltage prediction value of the target building unit at a future moment after the first moment based on multiple active power change values, multiple reactive power change values, multiple preset active power voltage sensitivities, multiple preset reactive power voltage sensitivities, the first communication topology matrix and the distribution voltage value of the target building unit at the first moment; wherein the multiple preset active power voltage sensitivities are respectively the voltage sensitivities of the active power in the multiple building units, the multiple preset reactive power voltage sensitivities are respectively the voltage sensitivities of the reactive power in the multiple building units, and the first communication topology matrix is ​​used to characterize the communication topology relationship of multiple control devices.

[0173] The control module 903 is used to control all variable frequency air conditioners in the target building unit at a future time according to the distribution voltage prediction value of the target building unit at a future time, so as to adjust the voltage of the distribution network.

[0174] Furthermore, the acquisition module 901 is specifically used to determine that the power distribution voltage value of the target building unit at the first moment is an actual value of the power distribution voltage, or a predicted value of the power distribution voltage.

[0175] Furthermore, the acquisition module 901 is specifically used to acquire active power change values, reactive power change values, and distribution voltage values ​​of multiple building units at historical moments before the first moment.

[0176] Furthermore, the calculation module 902 is specifically used to calculate the predicted value of the distribution voltage of the target building unit at the first moment based on multiple active power change values, multiple reactive power change values, multiple preset active power voltage sensitivities, multiple preset reactive power voltage sensitivities, the second communication topology matrix and the distribution voltage value of the target building unit at the historical moment.

[0177] Furthermore, the acquisition module 901 is specifically used to obtain the active power and reactive power of multiple building units at a moment before the first moment, and the active power and reactive power of multiple building units at the first moment; according to the active power and reactive power of multiple building units at a moment before the first moment, and the active power and reactive power of multiple building units at the first moment, the active power change values ​​and reactive power change values ​​of the multiple building units at the first moment are respectively calculated.

[0178] Furthermore, the control module 903 is specifically used to calculate the distribution voltage fluctuation ratio at a future moment according to the distribution voltage prediction value of the target building unit at a future moment and the preset distribution voltage reference value; if the distribution voltage fluctuation ratio at a future moment satisfies the preset voltage fluctuation range, then according to the distribution voltage prediction value of the target building unit at a future moment, all variable frequency air conditioners in the target building unit are controlled at a future moment.

[0179] Furthermore, the control module 903 is specifically used to calculate the active power and reactive power of the target building unit at a future moment according to the predicted value of the distribution voltage of the target building unit at a future moment; if the active power and reactive power of the target building unit at a future moment respectively meet the corresponding preset power ranges, then according to the predicted value of the distribution voltage of the target building unit at a future moment, all variable frequency air conditioners in the target building unit are controlled at a future moment.

[0180] Furthermore, the control module 903 is also specifically used to receive the active power adjustment signal and the reactive power adjustment signal of the air conditioning aggregator at the first moment sent by the aggregator control device; wherein, the active power adjustment signal of the air conditioning aggregator at the first moment is calculated by the aggregator control device according to the state values ​​of multiple variable frequency air conditioners at the first moment, the second communication topology matrix, the active power trigger function of the air conditioning aggregator at the first moment, the active power control signal, the active power control coefficient, and the active power change value; the reactive power adjustment signal of the air conditioning aggregator at the first moment is calculated by the aggregator control device according to the state values ​​of multiple variable frequency air conditioners at the first moment, the second communication topology matrix, the reactive power trigger function of the air conditioning aggregator at the first moment, the reactive power control signal, the reactive power control coefficient, and the reactive power change value; according to the distribution voltage prediction value of the target building unit at the future moment, the active power adjustment signal of the air conditioning aggregator at the first moment, and the reactive power adjustment signal of the air conditioning aggregator at the first moment, all the variable frequency air conditioners in the target building unit are controlled at the future moment.

[0181] Furthermore, the control module 903 is specifically configured to update the state values ​​of the plurality of variable frequency air conditioners at the first moment according to the state values ​​of the plurality of variable frequency air conditioners at the first moment, the second communication topology matrix, and the coupling strength.

[0182] Furthermore, the control module 903 is also specifically used to determine whether the voltage prediction value of the target building unit meets the preset grid voltage range based on the voltage prediction value and voltage reference value of the target building unit at the future moment; if the voltage fluctuation ratio meets the preset voltage fluctuation range, and the voltage prediction value of the target building unit meets the preset grid voltage range, then based on the distribution voltage prediction value of the target building unit at the future moment, all variable frequency air conditioners in the target building unit are controlled at the future moment.

[0183] Fig.10 A schematic diagram of a control device provided in an embodiment of the present application, wherein the control device may be a device with computing and processing functions.

[0184] The control device includes: a processor 1001 and a storage medium 1002. The processor 1001 and the storage medium 1002 are connected via a bus.

[0185] The storage medium 1002 is used to store programs, and the processor 1001 calls the programs stored in the storage medium 1002 to execute the above method embodiment. The specific implementation method and technical effect are similar and will not be repeated here.

[0186] Optionally, the present invention also provides a storage medium, including a program, which is used to execute the above-mentioned method embodiment when executed by a processor. In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0187] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0188] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0189] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform some steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random Access Memory, abbreviated: RAM), disk or optical disk and other media that can store program codes.

Claims

1. A variable frequency air conditioner control method for voltage regulation of a distribution network, characterized in that: Any control device among a plurality of control devices in an air conditioning cluster, the plurality of control devices are respectively arranged in a plurality of building units, each building unit is further provided with: at least one variable frequency air conditioner, the control device in each building unit is connected to the at least one variable frequency air conditioner, the plurality of control devices are communicatively connected, and the plurality of control devices are all communicatively connected to the aggregator control device, the method comprising: Obtaining active power change values, reactive power change values, and distribution voltage values ​​of the multiple building units at a first moment, wherein the active power change value and reactive power change value of each building unit are respectively the total active power change value and the total reactive power change value of all variable frequency air conditioners in each building unit; According to a plurality of active power change values, a plurality of reactive power change values, a plurality of preset active power voltage sensitivities, a plurality of preset reactive power voltage sensitivities, a first communication topology matrix, and a distribution voltage value of a target building unit at the first moment, a distribution voltage prediction value of the target building unit at a future moment after the first moment is calculated; wherein the plurality of preset active power voltage sensitivities are respectively voltage sensitivities of active power in the plurality of building units, the plurality of preset reactive power voltage sensitivities are respectively voltage sensitivities of reactive power in the plurality of building units, and the first communication topology matrix is ​​used to characterize the communication topology relationship of the plurality of control devices; According to the predicted value of the power distribution voltage of the target building unit at the future moment, all variable frequency air conditioners in the target building unit are controlled at the future moment to adjust the voltage of the distribution network.

2. The method according to claim 1, characterized in that The power distribution voltage value of the target building unit at the first moment is an actual value of the power distribution voltage, or a predicted value of the power distribution voltage.

3. The method according to claim 2, characterized in that If the distribution voltage value of the target building unit at the first moment is a distribution voltage prediction value, before obtaining the active power change values, reactive power change values ​​and distribution voltage values ​​of the multiple building units at the first moment, the method further includes: Acquire active power change values, reactive power change values, and distribution voltage values ​​of the multiple building units at historical moments before the first moment; According to the multiple active power change values, the multiple reactive power change values, the multiple preset active power voltage sensitivities, the multiple preset reactive power voltage sensitivities, the first communication topology matrix and the distribution voltage value of the target building unit at the historical moment, the distribution voltage prediction value of the target building unit at the first moment is calculated.

4. The method according to claim 1, characterized in that The obtaining of active power change values ​​and reactive power change values ​​of the plurality of building units at the first moment includes: Acquire the active power and reactive power of the multiple building units at a moment before the first moment, and the active power and reactive power of the multiple building units at the first moment; According to the active power and reactive power of the multiple building units at a moment before the first moment, and the active power and reactive power of the multiple building units at the first moment, the active power change value and reactive power change value of the multiple building units at the first moment are calculated respectively.

5. The method according to claim 1, characterized in that Before controlling all variable frequency air conditioners in the target building unit at the future time according to the predicted value of the power distribution voltage of the target building unit at the future time, the method further includes: Calculating the distribution voltage fluctuation ratio at the future moment according to the distribution voltage prediction value of the target building unit at the future moment and the preset distribution voltage reference value; The controlling of all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment comprises: If the power distribution voltage fluctuation ratio at the future time satisfies the preset voltage fluctuation range, all variable frequency air conditioners in the target building unit at the future time are controlled according to the power distribution voltage prediction value of the target building unit at the future time.

6. The method according to claim 1, characterized in that Before controlling all variable frequency air conditioners in the target building unit at the future time according to the predicted value of the power distribution voltage of the target building unit at the future time, the method further includes: Calculate the active power and reactive power of the target building unit at the future time according to the predicted value of the distribution voltage of the target building unit at the future time; The controlling of all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment comprises: If the active power and reactive power of the target building unit at the future moment meet the corresponding preset power ranges respectively, all variable frequency air conditioners in the target building unit at the future moment are controlled according to the predicted value of the distribution voltage of the target building unit at the future moment.

7. The method according to claim 1, characterized in that Before controlling all variable frequency air conditioners in the target building unit at the future time according to the predicted value of the power distribution voltage of the target building unit at the future time, the method further includes: Receive the active power adjustment signal and reactive power adjustment signal of the air conditioner aggregator at the first moment sent by the aggregator control device; wherein, the active power adjustment signal of the air conditioner aggregator at the first moment is calculated by the aggregator control device according to the state values ​​of multiple variable-frequency air conditioners at the first moment, the second communication topology matrix, the active power trigger function of the air conditioner aggregator at the first moment, the active power control signal, the active power control coefficient, and the active power change value; the reactive power adjustment signal of the air conditioner aggregator at the first moment is calculated by the aggregator control device according to the state values ​​of the multiple variable-frequency air conditioners at the first moment, the second communication topology matrix, the reactive power trigger function, the reactive power control signal, the reactive power control coefficient, and the reactive power change value of the air conditioner aggregator at the first moment; the second communication topology matrix is ​​used to characterize the communication topology relationship of the multiple variable-frequency air conditioners; The controlling of all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment comprises: According to the distribution voltage prediction value of the target building unit at the future moment, the active power regulation signal of the air conditioning aggregator at the first moment, and the reactive power regulation signal of the air conditioning aggregator at the first moment, all variable frequency air conditioners in the target building unit are controlled at the future moment.

8. The method according to claim 7, characterized in that Before receiving the active power adjustment signal and the reactive power adjustment signal of the air conditioning aggregator at the first moment sent by the aggregator control device, the method further includes: The state values ​​of the multiple variable frequency air conditioners at the first moment are updated according to the state values ​​of the multiple variable frequency air conditioners at the first moment, the second communication topology matrix, and the coupling strength.

9. The method according to claim 5, characterized in that Before controlling all variable frequency air conditioners in the target building unit at the future time according to the predicted value of the power distribution voltage of the target building unit at the future time, the method further includes: According to the voltage prediction value and the voltage reference value of the target building unit at the future moment, determining whether the voltage prediction value of the target building unit meets a preset grid voltage range; The controlling of all variable frequency air conditioners in the target building unit at the future moment according to the predicted value of the power distribution voltage of the target building unit at the future moment comprises: If the voltage fluctuation ratio satisfies the preset voltage fluctuation range, and the voltage prediction value of the target building unit satisfies the preset grid voltage range, all variable frequency air conditioners in the target building unit are controlled at the future time according to the distribution voltage prediction value of the target building unit at the future time.

10. A control device, characterized in that: include: A processor and a storage medium, wherein the processor and the storage medium are connected to each other via a bus communication, the storage medium stores program instructions executable by the processor, and the processor calls the program stored in the storage medium to execute the steps of the variable frequency air conditioning control method for distribution network voltage regulation as described in any one of claims 1 to 9.

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