Flexible interconnection device control method, device, equipment and medium

Abstract

The invention relates to a flexible interconnection device control method and device, equipment and a medium, and the method comprises the steps: determining the operation mode of a flexible interconnection device according to the operation state of each transformer area connected with the flexible interconnection device; constructing a corresponding control strategy model according to the operation mode of the flexible interconnection device; and solving the control strategy model to obtain the transmission efficiency of each port of the flexible interconnection device, and controlling the flexible interconnection device according to the transmission efficiency of each port of the flexible interconnection device. According to the method, the deduction planning of mutual energy aid between the transformer areas can be completed based on the operation modes of different transformer areas.

Description

Technical Field

[0001] The present invention relates to the field of electric power technology, and in particular to a flexible interconnection device control method, device, equipment and medium. Background Art

[0002] The further access of distributed energy has brought more flexibility and diversity to the power system. These energy sources are usually located on the user side, which can supply power nearby, reduce transmission losses, and improve energy efficiency. However, the access of distributed energy has also brought greater uncertainty and complexity to the power grid. Since the output of distributed energy is often affected by various factors such as weather and environment, its power generation is intermittent and volatile, which poses a challenge to the stable operation of the power grid. In order to meet these challenges, the smart grid needs to be continuously upgraded and improved. Therefore, the power grid needs to introduce more intelligent technologies and algorithms to realize intelligent management and optimized scheduling of the power grid.

[0003] The existing public patent document CN118232404A discloses an operation control method for a flexible interconnection system of a low-voltage distribution station area. This method only considers transferring power from a surplus station area with greater spare capacity to handle continuous disturbances to a demand station area that is unable to handle continuous disturbances, so as to achieve load balancing between various stations. It does not distinguish between the operating modes of the stations and the differences in optimization objectives under different operating modes, nor does it consider the fact that different stations may have different optimal load rates. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a flexible interconnection device control method, device, equipment and medium, which can complete the deduction planning of energy mutual assistance between substations based on the operation modes of different substations.

[0005] The technical solution adopted by the present invention to solve the technical problem is: to provide a flexible interconnection device control method, comprising the following steps:

[0006] Determine the operation mode of the flexible interconnection device according to the operation status of each area connected to the flexible interconnection device;

[0007] Constructing a corresponding control strategy model according to the operation mode of the flexible interconnection device;

[0008] The control strategy model is solved to obtain the transmission efficiency of each port of the flexible interconnection device, and the flexible interconnection device is controlled according to the transmission efficiency of each port of the flexible interconnection device.

[0009] The step of determining the operation mode of the flexible interconnection device according to the operation status of each station area connected to the flexible interconnection device includes:

[0010] Determine whether the load rate of the distribution transformers in each substation connected to the flexible interconnection device is greater than a threshold;

[0011] If the load rate of the distribution transformers in each substation connected to the flexible interconnection device is greater than a threshold, the operation mode of the flexible interconnection device is determined to be a power load sharing mode;

[0012] Determine whether power failure occurs in each substation area connected to the flexible interconnection device;

[0013] If a power failure occurs in each substation area connected to the flexible interconnection device, the operation mode of the flexible interconnection device is determined to be a fault transfer mode.

[0014] The method of constructing a corresponding control strategy model according to the operation mode of the flexible interconnection device includes: when the operation mode of the flexible interconnection device is the power load sharing mode, according to the capacity of the distribution transformer in each substation, the output power of the distribution transformer, the capacity of each port of the flexible interconnection device, the active power of the source-load-storage device and the capacity of the source-load-storage device, a first control strategy model is constructed with the goal of minimizing the difference between the load rate of the distribution transformers in different substations and the average load rate, or a second control strategy model is constructed with the goal of matching the optimal load rate of the distribution transformers in different substations.

[0015] The objective function of the first control strategy model is: , where f1(P FIDi,t ) is the objective function of the first control strategy model, min represents the minimum, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith substation, and N is the total number of substations.

[0016] The objective function of the second control strategy model is: , where f2(P FIDi,t ) is the objective function of the second control strategy model, min represents the minimum, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith area, N is the total number of areas, η b,i is the optimal load factor of the distribution transformer in the ith area, α i is the weight, expressed as: .

[0017] The constraints of the first control strategy model and the second control strategy model include:

[0018] The port capacity constraint of the flexible interconnection device is expressed as: ;

[0019] The active power balance constraint of the flexible interconnection device is expressed as: ;

[0020] The safety constraint of the distribution transformer in the substation is expressed as: ;

[0021] Among them, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S FIDi represents the port capacity of the flexible interconnect device corresponding to the ith area, N is the total number of areas, P Ti,t is the active power of the distribution transformer in the ith area at time t, P Ti,min is the minimum active power of the distribution transformer in the ith area, P Ti,max is the maximum active power of the distribution transformer in the ith area.

[0022] The corresponding control strategy model is constructed according to the operation mode of the flexible interconnection device, including: when the operation mode of the flexible interconnection device is the fault transfer mode, according to the distribution transformer capacity of each substation, the output power of the distribution transformer, the capacity of each port of the flexible interconnection device, the active power of the source-load-storage device and the capacity of the source-load-storage device, a third control strategy model is constructed with the goal of meeting the power supply of the faulty substation, or a fourth control strategy model is constructed with the goal of matching the optimal load rate of the distribution transformers in different substations.

[0023] The objective function of the third control strategy model is: , where f3 (P FIDi,t ) is the objective function of the third control strategy model, min represents the minimum, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith area, N is the total number of areas, and k is the fault area number.

[0024] The objective function of the fourth control strategy model is: , where f4(P FIDi,t ) is the objective function of the fourth control strategy model, min represents the minimum, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith area, N is the total number of areas, k is the fault area number, η b,iis the optimal load factor of the distribution transformer in the ith area, α i is the weight, expressed as: .

[0025] The constraints of the third control strategy model and the fourth control strategy model include:

[0026] The port capacity constraint of the flexible interconnection device is expressed as: ;

[0027] When the faulty area is in a non-reverse state, if the power margin of the normal area transfer is greater than the port capacity of the faulty area at time t, and the power loss capacity of the faulty area is less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area transfer at time t is greater than the port capacity of the faulty area, and the power loss capacity of the faulty area is not less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area transfer at time t is not greater than the port capacity of the fault area, and the power loss capacity of the fault area is less than the power margin of the normal area transfer, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area transfer at time t is not greater than the port capacity of the fault area, and the power loss capacity of the fault area is not less than the power margin of the normal area transfer, the active power balance constraint of the flexible interconnection device is expressed as: ;

[0028] When the faulty area is in reverse transmission state, if the receiving power margin of the normal area at time t is less than the port capacity of the faulty area, and the electric energy to be absorbed by the faulty area is greater than the receiving power margin of the normal area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the receiving power margin of the normal area at time t is less than the port capacity of the faulty area, and the electric energy to be absorbed by the faulty area is not greater than the receiving power margin of the normal area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the receiving power margin of the normal area at time t is not less than the port capacity of the faulty area, and the power required to be absorbed by the faulty area is less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area at time t is not less than the port capacity of the faulty area, and the power required to be absorbed by the faulty area is not less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ;

[0029] The safety constraint of the distribution transformer in the substation is expressed as: ;

[0030] Among them, P FIDi,tis the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S FIDi represents the port capacity of the flexible interconnect device corresponding to the ith area, N is the total number of areas, k is the fault area number, P sum_storage,t is the power required by the fault area, S FIDk is the port capacity of the fault area, P FIDi,min and P FIDi,max are the minimum and maximum power transmission values ​​of the flexible interconnection device port corresponding to the i-th station area, respectively, -sum_mar_min t is the normal area transfer power margin at time t, sum_mar_max t is the normal receiving power margin of the station area at time t, P Ti,t is the active power of the distribution transformer in the ith area at time t, P Ti,min is the minimum active power of the distribution transformer in the ith area, P Ti,max is the maximum active power of the distribution transformer in the ith area.

[0031] The technical solution adopted by the present invention to solve the technical problem is: to provide a flexible interconnection device control device, comprising:

[0032] A determination module, used to determine the operation mode of the flexible interconnection device according to the operation status of each station area connected to the flexible interconnection device;

[0033] A construction module, used to construct a corresponding control strategy model according to the operation mode of the flexible interconnection device;

[0034] The solution control module is used to solve the control strategy model to obtain the transmission efficiency of each port of the flexible interconnection device, and control the flexible interconnection device according to the transmission efficiency of each port of the flexible interconnection device.

[0035] The technical solution adopted by the present invention to solve its technical problem is: to provide an electronic device, including a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above-mentioned flexible interconnection device control method when executing the computer program.

[0036] The technical solution adopted by the present invention to solve its technical problem is: providing a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a processor, the steps of the above-mentioned flexible interconnection device control method are implemented.

[0037] Beneficial Effects

[0038] Due to the adoption of the above technical solution, the present invention has the following advantages and positive effects compared with the prior art: the present invention constructs a corresponding control strategy by determining the operation mode of the flexible interconnection device, and provides a deductive plan for energy mutual assistance between substations under the power load balancing mode and the fault transfer mode, thereby improving the efficiency of energy utilization between substations and realizing efficient access to new energy. At the same time, the control strategy model proposed by the present invention can quickly process real-time data, realize efficient and flexible power scheduling, and improve the stability and economy of the power system. Compared with traditional methods, the present invention shows significant advantages in improving power supply quality and optimizing resource allocation. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a flow chart of a low voltage flexible interconnection device control method according to a first embodiment of the present invention. DETAILED DESCRIPTION

[0040] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0041] The first embodiment of the present invention relates to a low voltage flexible interconnection device control method, such as Figure 1 As shown, the following steps are included:

[0042] Step 1: Determine the operation mode of the low-voltage flexible interconnection device according to the operation status of each substation connected to the low-voltage flexible interconnection device. In this embodiment, the low-voltage range of the low-voltage flexible interconnection device is generally 380V / 400V.

[0043] In this step, first, it is determined whether the load rate of the distribution transformers in each substation connected to the low-voltage flexible interconnection device is greater than the threshold value. If the load rate of the distribution transformers in each substation connected to the low-voltage flexible interconnection device is greater than the threshold value, the operation mode of the low-voltage flexible interconnection device is determined to be the power load sharing mode; secondly, it is determined whether a power failure occurs in each substation connected to the low-voltage flexible interconnection device. If a power failure occurs in each substation connected to the low-voltage flexible interconnection device, the operation mode of the low-voltage flexible interconnection device is determined to be the fault transfer mode.

[0044] Step 2: construct a corresponding control strategy model according to the operation mode of the low-voltage flexible interconnection device.

[0045] When the operation mode of the low-voltage flexible interconnection device is the power load sharing mode, this embodiment constructs a first control strategy model based on the capacity of the distribution transformer in each substation, the output power of the distribution transformer, the capacity of each port of the flexible interconnection device, the active power of the source-load-storage device, and the capacity of the source-load-storage device, with the goal of minimizing the difference between the load rate of the distribution transformers in different substations and the average load rate. The objective function of the first control strategy model is:

[0046] ;

[0047] Among them, f1 (P FIDi,t ) is the objective function of the first control strategy model, min represents the minimum, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith substation, and N is the total number of substations.

[0048] The constraints of the first control strategy model include:

[0049] The port capacity constraint of the flexible interconnection device is expressed as: , where S FIDi Represents the port capacity of the flexible interconnection device corresponding to the i-th station.

[0050] The active power balance constraint of the flexible interconnection device is expressed as: .

[0051] The safety constraint of the distribution transformer in the substation is expressed as: , where P Ti,min is the minimum active power of the distribution transformer in the ith area, P Ti,max is the maximum active power of the distribution transformer in the ith area.

[0052] In addition, it is worth mentioning that in the power load sharing mode, the second control strategy model can also be constructed with the goal of matching the optimal load rate of distribution transformers in different areas. The objective function of the second control strategy model is:

[0053] ;

[0054] Among them, f2 (P FIDi,t ) is the objective function of the second control strategy model, η b,iis the optimal load rate of the distribution transformer in the ith area. The optimal load rate of the distribution transformer in the area refers to the ratio of the actual load of the transformer to the rated capacity under the premise of ensuring the safe operation and economic efficiency of the transformer. According to the provisions of China's "Guidelines for Technical and Economic Evaluation of Energy Efficiency of Distribution Transformers", it is recommended that the load rate be controlled at 50%-70%. Therefore, in this implementation method, the optimal load rate of the distribution transformer in the area can be selected from the range of 50%-70% according to the actual situation. i is the weight, which is calculated as:

[0055] .

[0056] The constraints of the second control strategy model are the same as those of the first control strategy model and will not be described in detail here.

[0057] When the operation mode of the low-voltage flexible interconnection device is the fault transfer mode, this embodiment constructs a third control strategy model based on the capacity of the distribution transformer in each substation, the output power of the distribution transformer, the capacity of each port of the flexible interconnection device, the active power of the source-load-storage device, and the capacity of the source-load-storage device to meet the power supply of the fault substation. The objective function of the third control strategy model is:

[0058] ;

[0059] Among them, f3 (P FIDi,t ) is the objective function of the third control strategy model, and k is the fault area number.

[0060] In addition, when the operation mode of the low-voltage flexible interconnection device is the fault transfer mode, a fourth control strategy model can also be constructed with the goal of matching the optimal load rate of distribution transformers in different areas. The objective function of the fourth control strategy model is:

[0061] ;

[0062] Among them, f4 (P FIDi,t ) is the objective function of the fourth control strategy model, α i is the weight, which is calculated as:

[0063] .

[0064] In this mode, the flexible interconnection device port capacity constraints and the area distribution transformer safety constraints of the third and fourth control strategy models are the same as those of the first control strategy model, and the active power balance constraints of the flexible interconnection device are adjusted as follows:

[0065] I. If the faulty area is in a non-reverse state, it needs to be powered by the port where it is located, that is, the power required for the faulty area is Psum_storage,t >0, the power required by the faulty area is the power loss capacity of the faulty area:

[0066] I.1. If the normal area transfer power margin at time t is -sum_mar_min t Greater than the port capacity S of the fault area FIDk , that is - sum_mar_min t >S FIDk :

[0067] I.1.a. Power loss capacity of fault area P sum_storage,t Less than the port capacity S of the fault area FIDk , that is, P sum_storage,t FIDk , at this time, the active power balance constraint of the flexible interconnection device is expressed as:

[0068] .

[0069] I.1.b. Power loss capacity of fault area P sum_storage,t Not less than or equal to the port capacity S of the fault area FIDk , that is, P sum_storage,t ≥S FIDk , at this time, the active power balance constraint of the flexible interconnection device is expressed as:

[0070] .

[0071] I.2. If the normal area transfer power margin at time t is -sum_mar_min t Not greater than the port capacity S of the fault area FIDk , that is - sum_mar_min t ≤S FIDk :

[0072] I.2.a. Power loss capacity of fault area P sum_storage,t Less than the normal area transfer power margin - sum_mar_min t , that is, P sum_storage,t <-sum_mar_min t , at this time, the active power balance constraint of the flexible interconnection device is expressed as:

[0073] .

[0074] I.2.b. Power loss capacity of fault area P sum_storage,t Not less than the normal area transfer power margin - sum_mar_min t , that is, P sum_storage,t ≥-sum_mar_min t ​, at this time, the active power balance constraint of the flexible interconnection device is expressed as:

[0075] .

[0076] Among them, P FIDi,min is the minimum power transmission value of the flexible interconnection device port corresponding to the i-th area.

[0077] II. If the faulty area is in reverse transmission state, the power needs to be absorbed by the port where it is located, that is, the power required by the faulty area is P sum_storage,t ≤0, at this time, the power required by the faulty area is the electric energy that needs to be consumed by the faulty area:

[0078] II.1. If the margin of normal area receiving power at time t is sum_mar_max t Less than the port capacity S of the fault area FIDk , that is, sum_mar_max t FIDk :

[0079] II.1.a. If the power P that needs to be absorbed by the fault area sum_storage,t Greater than the normal area receiving power margin sum_mar_max t , that is -P sum_storage,t >sum_mar_max t , at this time, the active power balance constraint of the flexible interconnection device is expressed as:

[0080] .

[0081] Among them, P FIDi,max is the maximum power transmission value of the flexible interconnection device port corresponding to the i-th station.

[0082] II.1.b. If the fault area needs to consume the power P sum_storage,t Not greater than the normal area receiving power margin sum_mar_max t , that is -P sum_storage,t ≤sum_mar_max t , at this time, the active power balance constraint of the flexible interconnection device is expressed as:

[0083] .

[0084] II.2. If the margin of normal area receiving power at time t is sum_mar_max t Not less than the port capacity S of the fault area FIDk , that is, sum_mar_max t >S FIDk :

[0085] ​II.1.a. If the power P that needs to be absorbed by the fault area sum_storage,t Less than the port capacity S of the fault area FIDk , that is -P sum_storage,t FIDk , at this time, the active power balance constraint of the flexible interconnection device is expressed as:

[0086] .

[0087] II.1.b. If the fault area needs to consume the power P sum_storage,t Not less than the port capacity S of the fault area FIDk , that is, P sum_storage,t ≥S FIDk , at this time, the active power balance constraint of the flexible interconnection device is expressed as:

[0088] .

[0089] Step 3: Solve the control strategy model to obtain the transmission efficiency of each port of the low-voltage flexible interconnection device, and control the low-voltage flexible interconnection device according to the transmission efficiency of each port of the low-voltage flexible interconnection device.

[0090] This step can solve the control strategy model constructed in step 2. Since the control strategy models constructed in this embodiment are all single-objective multi-constraint optimization models, the transmission power of each port of the low-voltage flexible interconnection device can be obtained by using a single-objective multi-constraint optimization algorithm to solve it, thereby adjusting each port of the low-voltage flexible interconnection device to achieve economical operation of the flexible interconnection system in power load balancing mode and fault transfer mode.

[0091] It is not difficult to find that this embodiment determines the current operating mode of the flexible interconnection device according to the operating status of each substation connected to the flexible interconnection device. If the flexible interconnection device is in the power load-sharing mode, the transmission power of each port of the multi-terminal flexible interconnection device is calculated with the goal of minimizing the difference between the load rate of distribution transformers in different substations and the average load rate or matching the optimal load rate of distribution transformers in different substations, considering the port capacity constraint of the flexible interconnection device, the active power balance constraint of the flexible interconnection device, and the safety constraint of the distribution transformer in the substation; if the device is in the fault transfer mode, the goal is to meet the power supply of the fault substation or match the optimal load rate of distribution transformers in different substations, and it is necessary to modify the active power balance constraint of the flexible interconnection device according to whether the fault substation is in the reverse transmission state, and calculate the transmission power of each port of the multi-terminal flexible interconnection device, thereby completing the deduction planning of energy mutual assistance between substations, improving the efficiency of energy utilization between substations, and realizing efficient access to new energy.

[0092] A second embodiment of the present invention relates to a flexible interconnection device control device, comprising:​

[0093] A determination module, used to determine the operation mode of the flexible interconnection device according to the operation status of each station area connected to the flexible interconnection device;

[0094] A construction module, used to construct a corresponding control strategy model according to the operation mode of the flexible interconnection device;

[0095] The solution control module is used to solve the control strategy model to obtain the transmission efficiency of each port of the flexible interconnection device, and control the flexible interconnection device according to the transmission efficiency of each port of the flexible interconnection device.

[0096] The determination module comprises:

[0097] The first judgment unit is used to judge whether the load rate of the distribution transformers in each substation connected to the flexible interconnection device is greater than a threshold;

[0098] A first determining unit is used to determine that the operation mode of the flexible interconnection device is a power load sharing mode when the load rate of the distribution transformers of each substation connected to the flexible interconnection device is greater than a threshold value;

[0099] The second judgment unit is used to judge whether a power failure occurs in each area connected to the flexible interconnection device;

[0100] The second determining unit is used to determine that the operation mode of the flexible interconnection device is a fault transfer mode when a power failure occurs in each substation area connected to the flexible interconnection device.

[0101] When the operation mode of the flexible interconnection device is the power load sharing mode, the construction module constructs a first control strategy model with the goal of minimizing the difference between the load rate of distribution transformers in different substations and the average load rate, or constructs a second control strategy model with the goal of matching the optimal load rate of distribution transformers in different substations, based on the capacity of the distribution transformer in each substation, the output power of the distribution transformer, the capacity of each port of the flexible interconnection device, the active power of the source-load-storage device, and the capacity of the source-load-storage device.

[0102] The objective function of the first control strategy model is: , where f1(P FIDi,t ) is the objective function of the first control strategy model, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith substation, and N is the total number of substations.

[0103] The objective function of the second control strategy model is: , where f2(PFIDi,t ) is the objective function of the second control strategy model, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith area, N is the total number of areas, η b,i is the optimal load factor of the distribution transformer in the ith area, α i is the weight, expressed as: .

[0104] The constraints of the first control strategy model and the second control strategy model include:

[0105] The port capacity constraint of the flexible interconnection device is expressed as: ;

[0106] The active power balance constraint of the flexible interconnection device is expressed as: ;

[0107] The safety constraint of the distribution transformer in the substation is expressed as: ;

[0108] Among them, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S FIDi represents the port capacity of the flexible interconnect device corresponding to the ith area, N is the total number of areas, P Ti,t is the active power of the distribution transformer in the ith area at time t, P Ti,min is the minimum active power of the distribution transformer in the ith area, P Ti,max is the maximum active power of the distribution transformer in the ith area.

[0109] When the operation mode of the flexible interconnection device is the fault transfer mode, the construction module constructs a third control strategy model with the goal of meeting the power supply of the faulty substation according to the distribution transformer capacity of each substation, the output power of the distribution transformer, the capacity of each port of the flexible interconnection device, the active power of the source-load-storage device and the capacity of the source-load-storage device, or constructs a fourth control strategy model with the goal of matching the optimal load rate of the distribution transformers in different substations.

[0110] The objective function of the third control strategy model is: , where f3 (P FIDi,t ) is the objective function of the third control strategy model, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Tiis the rated capacity of the distribution transformer in the ith area, N is the total number of areas, and k is the fault area number.

[0111] The objective function of the fourth control strategy model is: , where f4(P FIDi,t ) is the objective function of the fourth control strategy model, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith area, N is the total number of areas, k is the fault area number, η b,i is the optimal load factor of the distribution transformer in the ith area, α i is the weight, expressed as: .

[0112] The constraints of the third control strategy model and the fourth control strategy model include:

[0113] The port capacity constraint of the flexible interconnection device is expressed as: ;

[0114] When the faulty area is in a non-reverse state, if the power margin of the normal area transfer is greater than the port capacity of the faulty area at time t, and the power loss capacity of the faulty area is less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area transfer at time t is greater than the port capacity of the faulty area, and the power loss capacity of the faulty area is not less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area transfer at time t is not greater than the port capacity of the fault area, and the power loss capacity of the fault area is less than the power margin of the normal area transfer, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area transfer at time t is not greater than the port capacity of the fault area, and the power loss capacity of the fault area is not less than the power margin of the normal area transfer, the active power balance constraint of the flexible interconnection device is expressed as: ;

[0115] When the faulty area is in reverse transmission state, if the receiving power margin of the normal area at time t is less than the port capacity of the faulty area, and the electric energy to be absorbed by the faulty area is greater than the receiving power margin of the normal area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the receiving power margin of the normal area at time t is less than the port capacity of the faulty area, and the electric energy to be absorbed by the faulty area is not greater than the receiving power margin of the normal area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the receiving power margin of the normal area at time t is not less than the port capacity of the faulty area, and the power required to be absorbed by the faulty area is less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area at time t is not less than the port capacity of the faulty area, and the power required to be absorbed by the faulty area is not less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ;

[0116] The safety constraint of the distribution transformer in the substation is expressed as: ;

[0117] Among them, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S FIDi represents the port capacity of the flexible interconnect device corresponding to the ith area, N is the total number of areas, k is the fault area number, P sum_storage,t is the power required by the fault area, S FIDk is the port capacity of the fault area, P FIDi,min and P FIDi,max are the minimum and maximum power transmission values ​​of the flexible interconnection device port corresponding to the i-th station area, respectively, -sum_mar_min t is the normal area transfer power margin at time t, sum_mar_max t is the normal receiving power margin of the station area at time t, P Ti,t is the active power of the distribution transformer in the ith area at time t, P Ti,min is the minimum active power of the distribution transformer in the ith area, P Ti,max is the maximum active power of the distribution transformer in the ith area.

[0118] The third embodiment of the present invention relates to an electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the flexible interconnection device control method of the first embodiment when executing the computer program.

[0119] The fourth embodiment of the present invention relates to a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the flexible interconnection device control method of the first embodiment are implemented.

[0120] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) containing computer-usable program codes.

[0121] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0122] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction method, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0123] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0124] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A flexible interconnection device control method, characterized in that: The following steps are involved: Determine the operation mode of the flexible interconnection device according to the operation status of each area connected to the flexible interconnection device; Constructing a corresponding control strategy model according to the operation mode of the flexible interconnection device; The control strategy model is solved to obtain the transmission efficiency of each port of the flexible interconnection device, and the flexible interconnection device is controlled according to the transmission efficiency of each port of the flexible interconnection device.

2. The flexible interconnection device control method according to claim 1, characterized in that: The step of determining the operation mode of the flexible interconnection device according to the operation status of each station area connected to the flexible interconnection device includes: Determine whether the load rate of the distribution transformers in each substation connected to the flexible interconnection device is greater than a threshold; If the load rate of the distribution transformers in each substation connected to the flexible interconnection device is greater than a threshold, the operation mode of the flexible interconnection device is determined to be a power load sharing mode; Determine whether power failure occurs in each substation area connected to the flexible interconnection device; If a power failure occurs in each substation area connected to the flexible interconnection device, the operation mode of the flexible interconnection device is determined to be a fault transfer mode.

3. The flexible interconnection device control method according to claim 2, characterized in that: The method of constructing a corresponding control strategy model according to the operation mode of the flexible interconnection device includes: when the operation mode of the flexible interconnection device is the power load sharing mode, according to the capacity of the distribution transformer in each substation, the output power of the distribution transformer, the capacity of each port of the flexible interconnection device, the active power of the source-load-storage device and the capacity of the source-load-storage device, a first control strategy model is constructed with the goal of minimizing the difference between the load rate of the distribution transformers in different substations and the average load rate, or a second control strategy model is constructed with the goal of matching the optimal load rate of the distribution transformers in different substations.

4. The flexible interconnection device control method according to claim 3, characterized in that: The objective function of the first control strategy model is: , where f1(P FIDi,t ) is the objective function of the first control strategy model, min represents the minimum, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith substation, and N is the total number of substations.

5. The flexible interconnection device control method according to claim 3, characterized in that: The objective function of the second control strategy model is: , where f2(P FIDi,t ) is the objective function of the second control strategy model, min represents the minimum, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith area, N is the total number of areas, η b,i is the optimal load factor of the distribution transformer in the ith area, α i is the weight, expressed as: .

6. The flexible interconnection device control method according to claim 3, characterized in that: The constraints of the first control strategy model and the second control strategy model include: The port capacity constraint of the flexible interconnect device is expressed as: ; The active power balance constraint of the flexible interconnection device is expressed as: ; The safety constraint of the distribution transformer in the substation is expressed as: ; Among them, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S FIDi represents the port capacity of the flexible interconnect device corresponding to the ith area, N is the total number of areas, P Ti,t is the active power of the distribution transformer in the ith area at time t, P Ti,min is the minimum active power of the distribution transformer in the ith area, P Ti,max is the maximum active power of the distribution transformer in the ith area.

7. The flexible interconnection device control method according to claim 2, characterized in that: The corresponding control strategy model is constructed according to the operation mode of the flexible interconnection device, including: when the operation mode of the flexible interconnection device is the fault transfer mode, according to the distribution transformer capacity of each substation, the output power of the distribution transformer, the capacity of each port of the flexible interconnection device, the active power of the source-load-storage device and the capacity of the source-load-storage device, a third control strategy model is constructed with the goal of meeting the power supply of the faulty substation, or a fourth control strategy model is constructed with the goal of matching the optimal load rate of the distribution transformers in different substations.

8. The flexible interconnection device control method according to claim 7, characterized in that: The objective function of the third control strategy model is: , where f3 (P FIDi,t ) is the objective function of the third control strategy model, min represents the minimum, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith area, N is the total number of areas, and k is the fault area number.

9. The flexible interconnection device control method according to claim 7, characterized in that: The objective function of the fourth control strategy model is: , where f4(P FIDi,t ) is the objective function of the fourth control strategy model, min represents the minimum, P Ti,t is the active power of the distribution transformer in the ith area at time t, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S Ti is the rated capacity of the distribution transformer in the ith area, N is the total number of areas, k is the fault area number, η b,i is the optimal load factor of the distribution transformer in the ith area, α i is the weight, expressed as: .

10. The flexible interconnection device control method according to claim 7, characterized in that: The constraints of the third control strategy model and the fourth control strategy model include: The port capacity constraint of the flexible interconnect device is expressed as: ; When the faulty area is in a non-reverse state, if the power margin of the normal area transfer is greater than the port capacity of the faulty area at time t, and the power loss capacity of the faulty area is less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area transfer at time t is greater than the port capacity of the faulty area, and the power loss capacity of the faulty area is not less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area transfer at time t is not greater than the port capacity of the fault area, and the power loss capacity of the fault area is less than the power margin of the normal area transfer, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area transfer at time t is not greater than the port capacity of the fault area, and the power loss capacity of the fault area is not less than the power margin of the normal area transfer, the active power balance constraint of the flexible interconnection device is expressed as: ; When the faulty area is in reverse transmission state, if the receiving power margin of the normal area at time t is less than the port capacity of the faulty area, and the electric energy to be absorbed by the faulty area is greater than the receiving power margin of the normal area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the receiving power margin of the normal area at time t is less than the port capacity of the faulty area, and the electric energy to be absorbed by the faulty area is not greater than the receiving power margin of the normal area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the receiving power margin of the normal area at time t is not less than the port capacity of the faulty area, and the power required to be absorbed by the faulty area is less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ; If the power margin of the normal area at time t is not less than the port capacity of the faulty area, and the power required to be absorbed by the faulty area is not less than the port capacity of the faulty area, the active power balance constraint of the flexible interconnection device is expressed as: ; The safety constraint of the distribution transformer in the substation is expressed as: ; Among them, P FIDi,t is the active power transferred by the flexible interconnection device port corresponding to the ith area at time t, S FIDi represents the port capacity of the flexible interconnect device corresponding to the ith area, N is the total number of areas, k is the fault area number, P sum_storage,t is the power required by the fault area, S FIDk is the port capacity of the fault area, P FIDi,min and P FIDi,max are the minimum and maximum power transmission values ​​of the flexible interconnection device port corresponding to the i-th station area, respectively, -sum_mar_min t is the normal area transfer power margin at time t, sum_mar_max t is the normal receiving power margin of the station area at time t, P Ti,t is the active power of the distribution transformer in the ith area at time t, P Ti,min is the minimum active power of the distribution transformer in the ith area, P Ti,max is the maximum active power of the distribution transformer in the ith area.

11. A flexible interconnection device control device, characterized in that: include: A determination module, used to determine the operation mode of the flexible interconnection device according to the operation status of each station area connected to the flexible interconnection device; A construction module, used to construct a corresponding control strategy model according to the operation mode of the flexible interconnection device; The solution control module is used to solve the control strategy model to obtain the transmission efficiency of each port of the flexible interconnection device, and control the flexible interconnection device according to the transmission efficiency of each port of the flexible interconnection device.

12. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the flexible interconnection device control method according to any one of claims 1 to 10 are implemented.

13. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the flexible interconnection device control method according to any one of claims 1 to 10 are implemented.

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