Power distribution network load control method, system and device under typhoon disaster and storage medium

Abstract

The invention relates to the technical field of power grid load control, and discloses a power distribution network load control method, system and device under a typhoon disaster and a storage medium, and the method comprises the steps: calculating a frequency control deviation according to a frequency deviation caused by the fault load loss of a power distribution line under the typhoon disaster, and decomposing a target value of the frequency control deviation, obtaining each sub-frequency control deviation target value; according to different control modes, setting a corresponding weight coefficient for each sub-frequency control deviation target value, and performing weighted summation to obtain a first target value of the frequency control deviation; according to the control mode, decomposing the power demand value of the secondary frequency modulation of the power distribution network in the typhoon, and obtaining a second target value of the frequency control deviation according to the fault lost load; and calculating the scheduling demand of the secondary frequency modulation power according to the first target value and the second target value. According to the invention, the accuracy of power distribution network load regulation and control in typhoon is effectively improved, and the safety and stability of power distribution network operation are further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid load control, and in particular to a method, system, device and storage medium for load control of a distribution network under typhoon disasters. Background Art

[0002] The power system is a huge and complex system involving multiple links such as generation, transmission, transformation, distribution and use. Its safe operation is closely related to the meteorological environment. Among them, the distribution network is the main object vulnerable to strong winds. Statistics show that distribution network pole collapse accidents occur frequently under the influence of landfalling typhoons, and their severity is far greater than the impact on the main network's power transmission and transformation equipment. At the same time, typhoons and wind disasters often lead to various secondary disasters, which not only affect the safe and stable operation of the power grid, but also put forward high technical requirements for emergency repairs and rapid power restoration. However, the current research on load control is aimed at normal weather conditions, and lacks consideration of the impact of extreme weather conditions and disaster scenarios such as super typhoons and heavy rains on power grid load control. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a method, system, device and storage medium for load control of a distribution network under typhoon disasters. By coordinating the two control modes, the load changes can be effectively responded to, thereby achieving the technical effect of improving the accuracy of load regulation of the distribution network during typhoons and enhancing the safety and stability of the distribution network operation.

[0004] In a first aspect, the present invention provides a method for controlling load of a distribution network under a typhoon disaster, the method comprising:

[0005] According to the frequency deviation caused by the failure and loss of load of the distribution line under the typhoon disaster, the frequency control deviation of the distribution network is calculated, and the target value of the frequency control deviation is decomposed to obtain the target values ​​of each sub-frequency control deviation;

[0006] According to different control modes, corresponding weight coefficients are set for each sub-frequency control deviation target value, and weighted summation is performed on each sub-frequency control deviation target value to obtain a first target value of the frequency control deviation;

[0007] According to the control mode, the power demand value of the secondary frequency regulation of the distribution network in the typhoon is decomposed, and according to the fault loss load, a second target value of the frequency control deviation is obtained;

[0008] The scheduling demand of the secondary frequency modulation power corresponding to each control mode is calculated according to the first target value and the second target value.

[0009] Furthermore, the step of calculating the frequency control deviation of the distribution network according to the frequency deviation caused by the failure and loss of load of the distribution line under the typhoon disaster includes:

[0010] Based on the historical and real-time data of typhoons, the failure probability and load loss power of distribution lines under different numbers of faults are calculated;

[0011] According to the failure probability and the load loss power, the load loss power of the distribution line during the typhoon is calculated;

[0012] The frequency deviation caused by load reduction is calculated according to the fault-lost load power, and the frequency control deviation of the distribution network is calculated according to the units and loads with secondary frequency regulation function in operation.

[0013] Furthermore, the step of decomposing the target value of the frequency control deviation to obtain target values ​​of each sub-frequency control deviation includes:

[0014] According to the distribution network and distribution equipment involved in the secondary frequency regulation, the target value of the frequency control deviation is decomposed into a first sub-frequency control deviation target value, a second sub-frequency control deviation target value, a third sub-frequency control deviation target value and a fourth sub-frequency control deviation target value;

[0015] Among them, the first sub-frequency control deviation target value is related to the load control of traditional generating units in operation and the secondary frequency regulation of online AGC units, the second sub-frequency control deviation target value is related to the secondary frequency regulation power of offline AGC units, the third sub-frequency control deviation target value is related to the dispatching control and market bidding control of other distribution networks operating in parallel with the distribution network that participate in secondary frequency regulation under typhoons through the dispatching center, and the fourth sub-frequency control deviation target value is related to the secondary frequency regulation of the operating load in the distribution network, and the operating load includes interrupted load, reducible load, shiftable load, transferable load, and bidirectional interactive load.

[0016] Furthermore, the first sub-frequency control deviation target value is expressed by the following formula:

[0017]

[0018] Where P FL Indicates failure load loss, represents the available frequency regulation power of the i-th AGC conventional synchronous generator set with secondary frequency regulation function in parallel operation with the local distribution network, represents the number of AGC traditional synchronous generator sets with secondary frequency regulation function in parallel operation with the local distribution network, and K2 represents the unit regulation power of the distribution network after dispatch;

[0019] The second sub-frequency control deviation target value is expressed by the following formula:

[0020]

[0021] In the formula, It represents the available frequency regulation power of the jth AGC traditional synchronous generator set with secondary frequency regulation function and dispatchable in other distribution networks connected in parallel with the local distribution network. It indicates the number of AGC traditional synchronous generators with secondary frequency regulation function and dispatchable in other distribution networks that are not in operation and are connected in parallel with the local distribution network;

[0022] The third sub-frequency control deviation target value is expressed by the following formula:

[0023]

[0024] In the formula, They represent the frequency regulation power output by AGC traditional synchronous generator sets with secondary frequency regulation function, interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network. They represent the number of AGC traditional synchronous generator sets with secondary frequency regulation function, interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network. They respectively represent the unit regulation power of AGC traditional synchronous generator sets with secondary frequency regulation function, interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact in both directions in other distribution networks connected in parallel with the local distribution network;

[0025] The fourth sub-frequency control deviation target value is expressed by the following formula:

[0026]

[0027] Where P D1,n1 , P D2,n2 , P D3,n3 , P D4,n4 , P D5,n5 They represent the power increment obtained by one adjustment of interruptible load, reducible load, shiftable load, transferable load and bidirectional interactive load in other distribution networks connected in parallel with the local distribution network, N D1 、N D2 、N D3 、N D4 、N D5 They represent the number of interruptible loads, loads that can be cut, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network, respectively. D1,n1 , K D2,n2 , K D3,n3 , K D4,n4 , KD5,n5 They respectively represent the unit regulation power of interruptible load, reducible load, shiftable load, transferable load and bidirectional interactive load in other distribution networks connected in parallel with the local distribution network;

[0028] The first target value is expressed by the following formula:

[0029]

[0030] k ACE,1 +k ACE,2 +k ACE,3 +k ACE,4 =1

[0031] k ACE,1D +k ACE,1M =k ACE,1

[0032] k ACE,2D +k ACE,2M =k ACE,2

[0033] k ACE,3D +k ACE,3M =k ACE,3

[0034] k ACE,4D +k ACE,4M =k ACE,4

[0035] In the formula, k ACE,1D and k ACE,1M They represent the weight coefficients of the dispatch control and market bidding control of the AGC units in operation participating in load control, k ACE,2D and k ACE,2M They represent the weight coefficients of dispatch control and market bidding control for re-dispatching non-operating AGC units participating in secondary frequency regulation under typhoons, k ACE,3D and k ACE,3M They represent the weight coefficients of dispatching control and market bidding control of other distribution networks that are connected to the distribution network and participate in the secondary frequency regulation under typhoons through dispatching by the dispatching center, respectively. ACE,4D and k ACE,4M They respectively represent the weight coefficients of the dispatching control and market bidding control of the operating load participating in the secondary frequency regulation under typhoons through the dispatching center.

[0036] Furthermore, the second target value is expressed by the following formula:

[0037]

[0038] Where P FLrepresents the load loss caused by the fault, K2 represents the unit adjustment power of the distribution network after dispatch, P ARR,1D and P ARR,1M They represent the frequency regulation power control of AGC units in the distribution network operation under typhoon based on dispatch control and market bidding control, P ARR,2D It represents the secondary frequency regulation power control amount determined by dispatching the operating load not participating in AGC operation in the distribution network under typhoon, P ARR,2M P represents the secondary frequency regulation power control amount purchased by the operating load in the distribution network based on market bidding control through market transactions, ARR,3D P represents the secondary frequency regulation power control amount of other distribution networks running in parallel with the distribution network under typhoon based on dispatch control, ARR,3M P represents the secondary frequency regulation power control amount purchased by other distribution networks operating in parallel with the distribution network under typhoon based on market bidding control through market transactions, ARR,4D and P ARR,4M They respectively represent the secondary frequency regulation power control amount determined by dispatching the operating load in the distribution network during a typhoon based on dispatching control and market bidding control.

[0039] Furthermore, the step of calculating the scheduling demand of the secondary frequency modulation power corresponding to each control mode according to the first target value and the second target value includes:

[0040] Performing equivalent calculation on the first target value and the second target value, and determining weight coefficients of each sub-frequency control deviation target value under different control modes;

[0041] According to the weight coefficient, the dispatch demand value of the secondary frequency modulation power corresponding to each control mode is calculated.

[0042] Furthermore, the following formula is used to express the frequency regulation power control amount of the AGC unit in the distribution network operation under typhoon based on dispatching control:

[0043]

[0044] Where P FL Indicates failure load loss, represents the available frequency regulation power of the i-th AGC conventional synchronous generator set with secondary frequency regulation function in parallel operation with the local distribution network, k ACE,1D The weight coefficient of the dispatch control of the AGC units in operation participating in load control, Δf ACE,1e represents the first sub-frequency control deviation target value, represents the number of AGC traditional synchronous generator sets with secondary frequency regulation function in parallel operation with the local distribution network, and K2 represents the unit regulation power of the distribution network after dispatch;

[0045] The following formula is used to express the frequency regulation power control amount of the AGC unit in the distribution network operation under typhoon based on market bidding control:

[0046]

[0047] Where P D1,n1 , P D1,n2 , P D1,n3 , P D1,n4 , P D1,n5 They represent the power increment obtained by one adjustment of interruptible load, reducible load, shiftable load, transferable load and bidirectional interactive load in other distribution networks connected in parallel with the local distribution network, N D1 、N D2 、N D3 、N D4 、N D5 They represent the number of interruptible loads, loads that can be cut, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network, respectively. ACE,1M Indicates the weight coefficient of market bidding control of the AGC units in operation participating in load control;

[0048] The following formula is used to express the secondary frequency regulation power control amount determined by dispatching the operating load that does not participate in AGC operation in the distribution network under typhoon control:

[0049]

[0050] In the formula, It represents the available frequency regulation power of the jth AGC traditional synchronous generator set with secondary frequency regulation function and dispatchable in other distribution networks connected in parallel with the local distribution network. k represents the number of non-operating AGC conventional synchronous generators with secondary frequency regulation function and dispatchable in other distribution networks connected in parallel with the local distribution network, ACE,2D represents the weight coefficient of dispatch control for re-dispatching the non-operating AGC units participating in secondary frequency regulation under typhoon, Δf ACE,2e The second sub-frequency controls the deviation target value;

[0051] The following formula is used to express the secondary frequency regulation power control amount purchased by the operating load in the distribution network based on market bidding control through market transactions:

[0052]

[0053] Where P D1,n1 , P D2,n2 , P D3,n3 , P D4,n4 , P D5,n5They represent the power increment obtained by one adjustment of interruptible load, reducible load, shiftable load, transferable load and bidirectional interactive load in other distribution networks connected in parallel with the local distribution network, N D1 、N D2 、N D3 、N D4 、N D5 They represent the number of interruptible loads, loads that can be cut, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network, respectively. ACE,2M It represents the weight coefficient of market bidding control for re-dispatching non-operating AGC units participating in secondary frequency regulation under typhoon;

[0054] The following formula is used to calculate the secondary frequency regulation power control amount of other distribution networks running in parallel with the distribution network under typhoon control through dispatching:

[0055]

[0056] Where P A,m It represents the frequency modulation power input to the distribution network by the mth distribution network running in parallel with the local distribution network and participating in the secondary frequency modulation under the typhoon. N A represents the number of other distribution networks that are dispatched by the dispatch center to participate in secondary frequency regulation during typhoons and are connected in parallel with the distribution network, k ACE,3D The weight coefficient of the dispatching control of other distribution networks that are connected to the distribution network and participate in the secondary frequency regulation under typhoons through the dispatching center;

[0057] The following formula is used to calculate the secondary frequency regulation power control amount purchased by other distribution networks operating in parallel with the distribution network through market transactions under typhoon conditions based on market bidding control:

[0058]

[0059] In the formula, k ACE,3M It represents the weight coefficient of market bidding control of other distribution networks that are connected to the distribution network and participate in the secondary frequency regulation under typhoons through the dispatching center;

[0060] The following formula is used to determine the secondary frequency regulation power control amount based on the dispatching control of the operating load in the distribution network under typhoon:

[0061]

[0062] In the formula, They respectively represent the frequency regulation power output by interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally with other distribution networks that are connected in parallel with the local distribution network and have secondary frequency regulation functions. They represent the number of interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks that are connected in parallel with the local distribution network and have secondary frequency regulation functions, respectively. ACE,4D K2 represents the weight coefficient of the dispatching control of the operating load participating in the secondary frequency regulation under typhoon through the dispatching center. C It represents the sum of the unit regulation power of other distribution networks that are connected to the local distribution network and participate in secondary frequency regulation under typhoons and are dispatched by the dispatch center;

[0063] The following formula is used to determine the secondary frequency regulation power control amount based on the dispatch of the operating load in the distribution network under typhoon control based on market bidding:

[0064]

[0065] In the formula, k ACE,4M It represents the weight coefficient of the market bidding control of the operating load participating in the secondary frequency regulation during typhoons through the dispatching center.

[0066] In a second aspect, the present invention provides a load control system for a distribution network under a typhoon disaster, the system comprising:

[0067] A target value decomposition module is used to calculate the frequency control deviation of the distribution network according to the frequency deviation caused by the failure and loss of load of the distribution line under the typhoon disaster, and decompose the target value of the frequency control deviation to obtain each sub-frequency control deviation target value;

[0068] A first target value calculation module is used to set corresponding weight coefficients for each sub-frequency control deviation target value according to different control modes, and perform weighted summation on each sub-frequency control deviation target value to obtain a first target value of the frequency control deviation;

[0069] A second target value calculation module is used to decompose the power demand value of the secondary frequency regulation of the distribution network in the typhoon according to the control mode, and obtain a second target value of the frequency control deviation according to the fault loss load;

[0070] The scheduling demand calculation module is used to calculate the scheduling demand of the secondary frequency modulation power corresponding to each control mode according to the first target value and the second target value.

[0071] In a third aspect, an embodiment of the present invention further provides a computer 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 above method when executing the computer program.

[0072] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program implements the steps of the above method when executed by a processor.

[0073] The present invention provides a method, system, device and storage medium for load control of a distribution network under typhoon disasters. The present invention adopts the coordinated control of two modes, primary frequency regulation based on dispatching control and secondary frequency regulation based on market bidding, to cope with the change of load. The present invention can accurately calculate the control amount of each secondary frequency regulation power of the distribution network under the influence of typhoon uncertainty, thereby effectively improving the accuracy of load control of the distribution network in typhoons, and further improving the safety and stability of the operation of the distribution network. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] Figure 1 1 is a flow chart of a method for controlling load of a distribution network under a typhoon disaster in an embodiment of the present invention;

[0075] Figure 2 is a schematic diagram of the structure of a load control system for a distribution network under a typhoon disaster in an embodiment of the present invention;

[0076] Figure 3 It is a diagram of the internal structure of a computer device in an embodiment of the present invention. DETAILED DESCRIPTION

[0077] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0078] See also Figure 1 The first embodiment of the present invention provides a method for controlling the load of a distribution network under a typhoon disaster, which includes steps S10 to S40:

[0079] Step S10, calculating the frequency control deviation of the distribution network according to the frequency deviation caused by the failure and loss of load of the distribution line under the typhoon disaster, and decomposing the target value of the frequency control deviation to obtain each sub-frequency control deviation target value;

[0080] Step S20, according to different control modes, respectively set corresponding weight coefficients for each sub-frequency control deviation target value, and perform weighted summation on each sub-frequency control deviation target value to obtain a first target value of the frequency control deviation;

[0081] Step S30, according to the control mode, decomposing the power demand value of the secondary frequency regulation of the distribution network in the typhoon, and obtaining a second target value of the frequency control deviation according to the fault load loss;

[0082] Step S40: Calculate the scheduling demand of the secondary frequency modulation power corresponding to each control mode according to the first target value and the second target value.

[0083] The present invention is aimed at the load control of the distribution network under typhoon disasters. Therefore, it is necessary to first evaluate the fault load loss power value caused by the fault of the distribution line in the distribution network under typhoon disasters, and calculate the deviation value of the frequency control in the secondary frequency regulation according to the frequency deviation value caused by the fault load loss. The specific calculation steps include:

[0084] Based on the historical and real-time data of typhoons, the failure probability and load loss power of distribution lines under different numbers of faults are calculated;

[0085] According to the failure probability and the load loss power, the load loss power of the distribution line during the typhoon is calculated;

[0086] The frequency deviation caused by load reduction is calculated according to the fault-lost load power, and the frequency control deviation of the distribution network is calculated according to the units and loads with secondary frequency regulation function in operation.

[0087] In this embodiment, it is assumed that when a typhoon passes through an area, its wind force, wind direction and wind speed have great uncertainty. In the typhoon-affected area, the uncertain wind force, wind direction and wind speed of the typhoon are taken into account, and the corresponding failure probability is set according to the number of failures of the distribution line caused by the typhoon, and then the distribution line failure probability corresponding to the distribution line under different numbers of failures is calculated using the historical data and dynamic real-time data of the typhoon. Here, the failure probability can be calculated by using historical data comparison algorithm or neural network model prediction, and no excessive restrictions are made here.

[0088] After obtaining the failure probability corresponding to different numbers of faults in the distribution line under typhoon disasters, the following formula can be used to evaluate the fault load loss power caused by the distribution line fault in the typhoon:

[0089]

[0090] In the formula, p FL,t represents the line failure probability when the number of distribution line failures is t, P FLH,t It represents the historical evaluation value of the load loss power of the distribution line fault when the number of distribution line faults is t, n FL Indicates the maximum number of distribution line faults.

[0091] Then calculate the frequency deviation caused by the failure of the distribution line during the typhoon, assuming that N G A traditional synchronous generator set, namely the AGC unit, participates in the secondary frequency regulation. The unit regulation power K = K G +K D Based on the historical evaluation value of the power loss due to distribution line failure, the load reduction P FL The frequency deviation caused can be expressed as:

[0092]

[0093] Among them, K G Indicates the unit regulating power of the generator, K D Indicates the unit regulation power of the load, N G Indicates the number of AGC units, N A1 represents the number of distribution networks, K G,a represents the unit regulation power of the ath generator, K A,b represents the unit regulation power of the bth distribution network, P G,a Indicates the available frequency modulation power of the generator, P A,b Indicates the available frequency regulation power of the distribution network.

[0094] In fact, the more distribution networks participate in the secondary frequency regulation, the greater the distribution network frequency regulation power supply capacity value, which can also increase the distribution network unit regulation power value; the larger the distribution network capacity participating in the secondary frequency regulation, the greater the distribution network frequency regulation power supply capacity value; at the same time, the greater the unit virtual regulation power of the distribution network participating in the secondary frequency regulation, the greater the unit regulation power value of the distribution network. If the load loss power of the distribution line fault in the typhoon is P FL , the frequency change caused by it is Δf(t), then the frequency control deviation of the distribution network in period t is Δf ACE It can be calculated by the following formula:

[0095]

[0096] In the formula, the number of AGC traditional synchronous generator sets with secondary frequency regulation function in operation is The available frequency regulation power of the i-th AGC conventional synchronous generator set with secondary frequency regulation function in operation is Its unit adjustment power is The number of interruptible loads in operation is N D1 The power increment obtained by one adjustment of the interruptible load during operation is P D1,n1 , its unit adjustment power is K D1,n1 ; The amount of load that can be reduced during operation is N D2 , the power increment obtained by one adjustment during operation is PD2,n2 , its unit adjustment power is K D2,n2 ; The number of loads that can be transferred is N D3 , the power increment obtained by one adjustment of the operating transferable load is P D3,n3 , its unit adjustment power is K D3,n3 ; The number of loads that can be translated during operation is N D4 The power increment obtained by one adjustment of the load that can be translated during operation is P D4,n4 , its unit adjustment power is K D4,n4 ; The number of bidirectional interactive loads in operation is N D5 The power increment obtained by adjusting the bidirectional interactive load once during operation is P D5,n5 , its unit adjustment power is K D5,n5 .

[0097] In order to achieve Δf ACE The present invention provides two control modes, namely dispatch control and market bidding control. ACE In the control mode, the target value of the distribution network frequency control deviation in time period t is calculated to be Δf ACE,e For loads with large fluctuations and long durations, when the available frequency modulation power of the traditional synchronous generator sets is insufficient, the dispatch center can dispatch the interruptible loads, the loads that can be reduced, the loads that can be shifted, the loads that can be transferred, and the loads that can interact with each other in both directions in the distribution network to participate in the secondary frequency modulation. For the sake of convenience, these loads are collectively referred to as operating loads in this embodiment. If Δf can be achieved by dispatching the operating loads in the distribution network of this area to participate in the secondary frequency modulation during a typhoon ACE The target value Δf ACE,e (Frequency deviation reduction: Δf ACE,e →0; frequency deviation is 0: Δf ACE,e =0; frequency increase: Δf ACE <0,|Δf ACE |=Δf ACE,e ), then there is no need to transfer frequency modulation power from other distribution networks. Otherwise, it is necessary to transfer secondary frequency modulation power from other distribution networks. Based on this, in this embodiment, the distribution network frequency control deviation Δf ACE The target value Δf ACE,e It is divided into 4 parts, namely the first sub-frequency control deviation target value Δf ACE,1e , the second sub-frequency control deviation target value Δf ACE,2e , the third sub-frequency control deviation target value Δf ACE,3e and the fourth sub-frequency control deviation target value Δf ACE,4e .

[0098] Specifically, the first sub-frequency control deviation target value is related to the load control of the traditional generator set in operation and the secondary frequency regulation of the online AGC unit, the second sub-frequency control deviation target value is related to the secondary frequency regulation power of the offline AGC unit, the third sub-frequency control deviation target value is related to the dispatching control and market bidding control of other distribution networks that are connected to the distribution network and participate in the secondary frequency regulation under the typhoon through the dispatching center, and the fourth sub-frequency control deviation target value is related to the secondary frequency regulation of the operating load in the distribution network. The following formula is used to express the first sub-frequency control deviation target value:

[0099]

[0100] Where P FL Indicates failure load loss, represents the available frequency regulation power of the i-th AGC conventional synchronous generator set with secondary frequency regulation function in parallel operation with the local distribution network, It represents the number of AGC traditional synchronous generator sets with secondary frequency regulation function in parallel operation with the local distribution network. K2 represents the unit regulation power of the distribution network after dispatch. Specifically, K2 is determined by the unit regulation power of the non-operating traditional synchronous generator sets that participate in the secondary frequency regulation through the re-dispatch, the unit regulation power of other distribution networks that participate in the secondary frequency regulation through the dispatch center and are still in parallel operation with the distribution network in this area under the typhoon, and the virtual unit regulation power of the interruptible load, the reducible load, the shiftable load, the transferable load, and the two-way interactive load that participate in the secondary frequency regulation through the dispatch center, that is:

[0101]

[0102] Among them, the number of AGC traditional synchronous generator sets with secondary frequency regulation function in parallel operation with the local distribution network is The available frequency regulation power of the i-th AGC conventional synchronous generator set with secondary frequency regulation function in parallel operation with the local distribution network is Its unit adjustment power is The number of AGC conventional synchronous generators with secondary frequency regulation function and dispatchable in other distribution networks that are not in operation and are connected in parallel with the local distribution network is The available frequency regulation power of the jth AGC conventional synchronous generator set with secondary frequency regulation function and dispatchable in other distribution networks parallel to the local distribution network is Its unit adjustment power is The number of interruptible loads in other distribution networks connected in parallel with the local distribution network is N. D1 The power increment of the interruptible load in other distribution networks connected in parallel with the local distribution network is P D1,n1 , its unit adjustment power is K D1,n1; The number of loads that can be reduced in other distribution networks connected in parallel with the local distribution network is N D2 , the power increment obtained by the one-time adjustment of the load that can be reduced by other distribution networks connected in parallel with the local distribution network is P D2,n2 , its unit adjustment power is K D2,n2 ; The number of transferable loads in other distribution networks connected in parallel with the local distribution network is N D3 The power increment of the transferable load in other distribution networks connected in parallel with the local distribution network is P D3,n3 , its unit adjustment power is K D3,n3 ; The number of loads that can be shifted in other distribution networks connected in parallel with the local distribution network is N D4 The power increment obtained by one adjustment of the shiftable load in other distribution networks connected in parallel with the local distribution network is P D4,n4 , its unit adjustment power is K D4,n4 ; The number of bidirectional interactive loads in other distribution networks connected in parallel with the local distribution network is N D5 The power increment obtained by one adjustment of the bidirectional interactive load in other distribution networks connected in parallel with the local distribution network is P D5,n5 , its unit adjustment power is K D5,n5 ; The number of other distribution networks that are dispatched by the dispatch center to participate in secondary frequency regulation and run in parallel with the distribution network during a typhoon is N A Under typhoon, the frequency modulation power input to the distribution network by the mth distribution network participating in the secondary frequency modulation dispatched by the dispatch center and running in parallel with the local distribution network is P A,m , its unit adjustment power is K A,m .

[0103] The second sub-frequency control deviation target value is expressed by the following formula:

[0104]

[0105] The third sub-frequency control deviation target value is expressed by the following formula:

[0106]

[0107] In the formula, They represent the frequency regulation power output by AGC traditional synchronous generator sets with secondary frequency regulation function, interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network. They represent the number of AGC traditional synchronous generator sets with secondary frequency regulation function, interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network. They respectively represent the unit regulation power of AGC traditional synchronous generator sets with secondary frequency regulation function in other distribution networks connected in parallel with the local distribution network, interruptible loads, reducible loads, shiftable loads, transferable loads, and bidirectional interactive loads.

[0108] The fourth sub-frequency control deviation target value is expressed by the following formula:

[0109]

[0110] In the case of Δf based on market bidding control ACE In the control mode, the interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in the distribution network under typhoons can participate in the bidding for secondary frequency regulation in the auxiliary market, give the power and quotation for secondary frequency regulation, and finally realize the frequency control deviation value Δf of the distribution network in time period t. ACE control objectives.

[0111] When the corresponding weight coefficients are set for the four parts of the frequency control deviation target value according to different control modes, the distribution network frequency control deviation Δf ACE The first target value Δf A 1 CE,e It can be expressed as:

[0112]

[0113] k ACE,1 +k ACE,2 +k ACE,3 +k ACE,4 =1

[0114] k ACE,1D +k ACE,1M =k ACE,1

[0115] k ACE,2D +k ACE,2M =k ACE,2

[0116] k ACE,3D +k ACE,3M =k ACE,3

[0117] k ACE,4D +k ACE,4M =k ACE,4

[0118] In the formula, k ACE,1D and k ACE,1M They represent the weight coefficients of the dispatch control and market bidding control of the AGC units in operation participating in load control, k ACE,2D and kACE,2M They represent the weight coefficients of dispatch control and market bidding control for re-dispatching non-operating AGC units participating in secondary frequency regulation under typhoons, k ACE,3D and k ACE,3M They represent the weight coefficients of dispatching control and market bidding control of other distribution networks that are connected to the distribution network and participate in the secondary frequency regulation under typhoons through dispatching by the dispatching center, respectively. ACE,4D and k ACE,4M They respectively represent the weight coefficients of the dispatching control and market bidding control of the operating load participating in the secondary frequency regulation under typhoons through the dispatching center.

[0119] The power demand value P of the secondary frequency regulation of the distribution network in the present invention ARR It also includes two parts, namely, the available frequency regulation power of the AGC traditional synchronous generator set with secondary frequency regulation function that is not in operation in the distribution network, and the frequency regulation power that can be provided by the interruptible load, the load that can be reduced, the load that can be shifted, the load that can be transferred, and the load that can interact bidirectionally that can participate in the secondary frequency regulation alone. In order to meet the secondary frequency regulation power demand value P of the distribution network during the typhoon period t ARR The present invention also provides two control modes: dispatching control and market bidding control.

[0120] In the P based on dispatch control ARR In the control mode, the secondary frequency regulation power demand value P of the distribution network in period t is calculated based on ARR The dispatch center can dispatch interruptible loads, load reduction loads, load translation loads, load transfer loads, and loads that can interact with each other in the distribution network to participate in secondary frequency regulation during typhoons. If the loads running in the distribution network during typhoons are dispatched to participate in secondary frequency regulation, P ARR If the target value is reached, there is no need to transfer frequency regulation power from other distribution networks running in parallel with the distribution network. Otherwise, it is necessary to transfer secondary frequency regulation power from other distribution networks that are still running in parallel with the distribution network in this area during typhoons. ARR In the control mode, the secondary frequency regulation power demand value P of the distribution network in period t is calculated based on ARR The interruptible load, the load that can be reduced, the load that can be shifted, the load that can be transferred, and the load that can interact bidirectionally in the distribution network under the typhoon can participate in the bidding of the secondary frequency regulation in the auxiliary market, give the power and quotation of the secondary frequency regulation, and finally realize the secondary frequency regulation power demand value P of the distribution network in the period t ARR Therefore, based on the power demand value of secondary frequency regulation of the distribution network under typhoon, the second target value of the frequency control deviation in the secondary frequency regulation is It can be determined as:

[0121]

[0122] Where P FL represents the load loss caused by the fault, K2 represents the unit adjustment power of the distribution network after dispatch, P ARR,1D and P ARR,1M They represent the frequency regulation power control of AGC units in the distribution network operation under typhoon based on dispatch control and market bidding control, P ARR,2D It represents the secondary frequency regulation power control amount determined by dispatching the operating load not participating in AGC operation in the distribution network under typhoon, P ARR,2M P represents the secondary frequency regulation power control amount purchased by the operating load in the distribution network based on market bidding control through market transactions, ARR,3D P represents the secondary frequency regulation power control amount of other distribution networks running in parallel with the distribution network under typhoon based on dispatch control, ARR,3M P represents the secondary frequency regulation power control amount purchased by other distribution networks operating in parallel with the distribution network under typhoon based on market bidding control through market transactions, ARR,4D and P ARR,4M They respectively represent the secondary frequency regulation power control amount determined by dispatching the operating load in the distribution network during a typhoon based on dispatching control and market bidding control.

[0123] After the first target value and the second target value are determined, the dispatch demand of the secondary frequency modulation power corresponding to each control mode can be calculated based on the two target values ​​and the corresponding weight coefficients. The specific calculation steps include:

[0124] Performing equivalent calculation on the first target value and the second target value, and determining weight coefficients of each sub-frequency control deviation target value under different control modes;

[0125] According to the weight coefficient, the dispatch demand value of the secondary frequency modulation power corresponding to each control mode is calculated.

[0126] In this embodiment, the control mode includes dispatch control and market bidding control, and the dispatch demand value includes the secondary frequency regulation power control amount of the AGC unit in the distribution network under typhoon operation, the secondary frequency regulation power control amount of the AGC unit not in operation, the secondary frequency regulation power control amount of other distribution networks running in parallel with the distribution network, and the secondary frequency regulation power control amount of the operating load in the distribution network under typhoon. Based on the existing secondary frequency regulation power control amount calculation method, the above secondary frequency regulation power control amount can be expressed by the following formula;

[0127] Among them, the following formula is used to express the frequency regulation power control amount of the AGC unit in the distribution network operation under typhoon based on dispatching control:

[0128]

[0129] Where P FLIndicates failure load loss, represents the available frequency regulation power of the i-th AGC conventional synchronous generator set with secondary frequency regulation function in parallel operation with the local distribution network, k ACE,1D The weight coefficient of the dispatch control of the AGC units in operation participating in load control, Δf ACE,1e represents the first sub-frequency control deviation target value, represents the number of AGC traditional synchronous generator sets with secondary frequency regulation function in parallel operation with the local distribution network, and K2 represents the unit regulation power of the distribution network after dispatch;

[0130] The following formula is used to express the frequency regulation power control amount of the AGC unit in the distribution network operation under typhoon based on market bidding control:

[0131]

[0132] Where P D1,n1 , P D1,n2 , P D1,n3 , P D1,n4 , P D1,n5 They represent the power increment obtained by one adjustment of interruptible load, reducible load, shiftable load, transferable load and bidirectional interactive load in other distribution networks connected in parallel with the local distribution network, N D1 、N D2 、N D3 、N D4 、N D5 They represent the number of interruptible loads, loads that can be cut, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network, respectively. ACE,1M Indicates the weight coefficient of market bidding control of the AGC units in operation participating in load control;

[0133] The following formula is used to express the secondary frequency regulation power control amount determined by dispatching the operating load that does not participate in AGC operation in the distribution network under typhoon control:

[0134]

[0135] In the formula, It represents the available frequency regulation power of the jth AGC traditional synchronous generator set with secondary frequency regulation function and dispatchable in other distribution networks connected in parallel with the local distribution network. k represents the number of non-operating AGC conventional synchronous generators with secondary frequency regulation function and dispatchable in other distribution networks connected in parallel with the local distribution network, ACE,2D represents the weight coefficient of dispatch control for re-dispatching the non-operating AGC units participating in secondary frequency regulation under typhoon, Δf ACE,2eThe second sub-frequency controls the deviation target value;

[0136] The following formula is used to express the secondary frequency regulation power control amount purchased by the operating load in the distribution network based on market bidding control through market transactions:

[0137]

[0138] Where P D1,n1 , P D2,n2 , P D3,n3 , P D4,n4 , P D5,n5 They represent the power increment obtained by one adjustment of interruptible load, reducible load, shiftable load, transferable load and bidirectional interactive load in other distribution networks connected in parallel with the local distribution network, N D1 、N D2 、N D3 、N D4 、N D5 They represent the number of interruptible loads, loads that can be cut, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network, respectively. ACE,2M It represents the weight coefficient of market bidding control for re-dispatching non-operating AGC units participating in secondary frequency regulation under typhoon;

[0139] The following formula is used to calculate the secondary frequency regulation power control amount of other distribution networks running in parallel with the distribution network under typhoon control through dispatching:

[0140]

[0141] Where P A,m It represents the frequency modulation power input to the distribution network by the mth distribution network running in parallel with the local distribution network and participating in the secondary frequency modulation under the typhoon. N A represents the number of other distribution networks that are dispatched by the dispatch center to participate in secondary frequency regulation during typhoons and are connected in parallel with the distribution network, k ACE,3D The weight coefficient of the dispatching control of other distribution networks that are connected to the distribution network and participate in the secondary frequency regulation under typhoons through the dispatching center;

[0142] The following formula is used to calculate the secondary frequency regulation power control amount purchased by other distribution networks operating in parallel with the distribution network through market transactions under typhoon conditions based on market bidding control:

[0143]

[0144] In the formula, k ACE,3MIt represents the weight coefficient of market bidding control of other distribution networks that are connected to the distribution network and participate in the secondary frequency regulation under typhoons through the dispatching center;

[0145] The following formula is used to determine the secondary frequency regulation power control amount based on the dispatching control of the operating load in the distribution network under typhoon:

[0146]

[0147] In the formula, They respectively represent the frequency regulation power output by interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally with other distribution networks that are connected in parallel with the local distribution network and have secondary frequency regulation functions. They represent the number of interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks that are connected in parallel with the local distribution network and have secondary frequency regulation functions, respectively. ACE,4D It represents the weight coefficient of the dispatching control of the operating load participating in the secondary frequency regulation under typhoon through the dispatching center, It represents the sum of the unit regulation power of other distribution networks that are connected to the local distribution network and participate in secondary frequency regulation under typhoons and are dispatched by the dispatch center;

[0148] The following formula is used to determine the secondary frequency regulation power control amount based on the dispatch of the operating load in the distribution network under typhoon control based on market bidding:

[0149]

[0150] In the formula, k ACE,4M It represents the weight coefficient of the market bidding control of the operating load participating in the secondary frequency regulation during typhoons through the dispatching center.

[0151] Based on the above calculation formula for the secondary frequency modulation power control amount, when other parameters can be obtained, after the corresponding weight coefficient is obtained according to the above steps, the weight coefficient is substituted into the above formula to obtain the secondary frequency modulation power control amounts under different control modes of dispatching control and market bidding control.

[0152] This embodiment provides a method for controlling the load of a distribution network under a typhoon disaster. The present invention adopts the coordinated control of two modes, namely, primary frequency regulation based on dispatching control and secondary frequency regulation based on market bidding, to cope with the change of load. The control characteristics of different types of loads are used to determine the distribution coefficient of the frequency control deviation target value, so as to accurately calculate the control amount of each secondary frequency regulation power of the distribution network under the influence of typhoon uncertainty. The present invention effectively improves the accuracy of load control of the distribution network during typhoons, and further improves the safety and stability of the operation of the distribution network.

[0153] See also Figure 2 Based on the same inventive concept, a second embodiment of the present invention proposes a load control system for a distribution network under a typhoon disaster, comprising:

[0154] The target value decomposition module 10 is used to calculate the frequency control deviation of the distribution network according to the frequency deviation caused by the failure and loss of load of the distribution line under the typhoon disaster, and decompose the target value of the frequency control deviation to obtain each sub-frequency control deviation target value;

[0155] A first target value calculation module 20 is used to set corresponding weight coefficients for each sub-frequency control deviation target value according to different control modes, and perform weighted summation on each sub-frequency control deviation target value to obtain a first target value of the frequency control deviation;

[0156] A second target value calculation module 30 is used to decompose the power demand value of the secondary frequency regulation of the distribution network in the typhoon according to the control mode, and obtain a second target value of the frequency control deviation according to the fault loss load;

[0157] The scheduling demand calculation module 40 is used to calculate the scheduling demand of the secondary frequency modulation power corresponding to each control mode according to the first target value and the second target value.

[0158] The technical features and technical effects of the load control system for the distribution network under typhoon disasters proposed in the embodiment of the present invention are the same as the method proposed in the embodiment of the present invention, and will not be repeated here. Each module in the above-mentioned load control system for the distribution network under typhoon disasters can be implemented in whole or in part by software, hardware and a combination thereof. The above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the operations corresponding to the above modules.

[0159] In addition, an embodiment of the present invention further provides a computer 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 method when executing the computer program.

[0160] See also Figure 3, an internal structure diagram of a computer device in an embodiment, the computer device can specifically be a terminal or a server. The computer device includes a processor, a memory, a network interface, a display and an input device connected through a system bus. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The network interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a method for controlling the load of a distribution network under a typhoon disaster is implemented. The display screen of the computer device can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covered on the display screen, or a key, trackball or touchpad set on the housing of the computer device, or an external keyboard, touchpad or mouse, etc.

[0161] It can be understood by those skilled in the art that Figure 3 The structure shown in the figure is only a block diagram of a part of the structure related to the scheme of the present application, and does not constitute a limitation on the computer device to which the scheme of the present application is applied. The specific computing device may include more or fewer components than shown in the figure, or combine certain components, or have the same component arrangement.

[0162] In addition, an embodiment of the present invention further provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the steps of the above method are implemented.

[0163] In summary, an embodiment of the present invention proposes a method, system, device and storage medium for load control of a distribution network under a typhoon disaster. The method calculates the frequency control deviation of the distribution network according to the frequency deviation caused by the fault and load loss of the distribution line under the typhoon disaster, and decomposes the target value of the frequency control deviation to obtain each sub-frequency control deviation target value; according to different control modes, a corresponding weight coefficient is set for each sub-frequency control deviation target value, and the weighted sum of each sub-frequency control deviation target value is performed to obtain a first target value of the frequency control deviation; according to the control mode, the power demand value of the secondary frequency regulation of the distribution network in the typhoon is decomposed, and according to the fault and load loss, a second target value of the frequency control deviation is obtained; according to the first target value and the second target value, the scheduling demand for the secondary frequency regulation power corresponding to each control mode is calculated. The present invention adopts the coordinated control of the primary frequency regulation based on dispatching control and the secondary frequency regulation based on market bidding to cope with the change of load, and utilizes the regulation characteristics of different types of loads to determine the distribution coefficient of the frequency control deviation target value, so as to accurately calculate the regulation amount of each secondary frequency regulation power of the distribution network under the influence of typhoon uncertainty. The present invention effectively improves the accuracy of load regulation of the distribution network during typhoons, and further improves the safety and stability of the operation of the distribution network.

[0164] Each embodiment in this specification is described in a progressive manner, and the same or similar parts of each embodiment can be directly referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment. It should be noted that the technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0165] The above-mentioned embodiments only express several preferred implementation modes of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in the technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be regarded as the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be based on the protection scope of the claims.

Claims

1. A method for controlling the load of a distribution network under a typhoon disaster, characterized in that: include: According to the frequency deviation caused by the failure and loss of load of the distribution line under the typhoon disaster, the frequency control deviation of the distribution network is calculated, and the target value of the frequency control deviation is decomposed to obtain the target values ​​of each sub-frequency control deviation; According to different control modes, corresponding weight coefficients are set for each sub-frequency control deviation target value, and weighted summation is performed on each sub-frequency control deviation target value to obtain a first target value of the frequency control deviation; According to the control mode, the power demand value of the secondary frequency regulation of the distribution network in the typhoon is decomposed, and according to the fault loss load, a second target value of the frequency control deviation is obtained; The scheduling demand of the secondary frequency modulation power corresponding to each control mode is calculated according to the first target value and the second target value.

2. The method for controlling the load of a distribution network under a typhoon disaster according to claim 1, characterized in that: The step of calculating the frequency control deviation of the distribution network according to the frequency deviation caused by the failure and loss of load of the distribution line under the typhoon disaster includes: Based on the historical and real-time data of typhoons, the failure probability and load loss power of distribution lines under different numbers of faults are calculated; According to the failure probability and the load loss power, the load loss power of the distribution line during the typhoon is calculated; The frequency deviation caused by load reduction is calculated according to the fault-lost load power, and the frequency control deviation of the distribution network is calculated according to the units and loads with secondary frequency regulation function in operation.

3. The method for controlling the load of a distribution network under a typhoon disaster according to claim 1, characterized in that: The step of decomposing the target value of the frequency control deviation to obtain target values ​​of each sub-frequency control deviation comprises: According to the distribution network and distribution equipment involved in the secondary frequency regulation, the target value of the frequency control deviation is decomposed into a first sub-frequency control deviation target value, a second sub-frequency control deviation target value, a third sub-frequency control deviation target value and a fourth sub-frequency control deviation target value; Among them, the first sub-frequency control deviation target value is related to the load control of traditional generating units in operation and the secondary frequency regulation of online AGC units, the second sub-frequency control deviation target value is related to the secondary frequency regulation power of offline AGC units, the third sub-frequency control deviation target value is related to the dispatching control and market bidding control of other distribution networks operating in parallel with the distribution network that participate in secondary frequency regulation under typhoons through the dispatching center, and the fourth sub-frequency control deviation target value is related to the secondary frequency regulation of the operating load in the distribution network, and the operating load includes interrupted load, reducible load, shiftable load, transferable load, and bidirectional interactive load.

4. The method for controlling the load of a distribution network under a typhoon disaster according to claim 3, characterized in that: The first sub-frequency control deviation target value is expressed by the following formula: Where P FL Indicates failure load loss, represents the available frequency regulation power of the i-th AGC conventional synchronous generator set with secondary frequency regulation function in parallel operation with the local distribution network, represents the number of AGC traditional synchronous generator sets with secondary frequency regulation function in parallel operation with the local distribution network, and K2 represents the unit regulation power of the distribution network after dispatch; The second sub-frequency control deviation target value is expressed by the following formula: In the formula, It represents the available frequency regulation power of the jth AGC traditional synchronous generator set with secondary frequency regulation function and dispatchable in other distribution networks connected in parallel with the local distribution network. It indicates the number of AGC traditional synchronous generators with secondary frequency regulation function and dispatchable in other distribution networks that are not in operation and are connected in parallel with the local distribution network; The third sub-frequency control deviation target value is expressed by the following formula: In the formula, They represent the frequency regulation power output by AGC traditional synchronous generator sets with secondary frequency regulation function, interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network. They represent the number of AGC traditional synchronous generator sets with secondary frequency regulation function, interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network. They respectively represent the unit regulation power of AGC traditional synchronous generator sets with secondary frequency regulation function, interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact in both directions in other distribution networks connected in parallel with the local distribution network; The fourth sub-frequency control deviation target value is expressed by the following formula: Where P D1,n1 , P D2,n2 , P D3,n3 , P D4,n4 , P D5,n5 They represent the power increment obtained by one adjustment of interruptible load, reducible load, shiftable load, transferable load and bidirectional interactive load in other distribution networks connected in parallel with the local distribution network, N D1 、N D2 、N D3 、N D4 、N D5 They represent the number of interruptible loads, loads that can be cut, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network, respectively. D1,n1 , K D2,n2 , K D3,n3 , K D4,n4 , K D5,n5 They respectively represent the unit regulation power of interruptible load, reducible load, shiftable load, transferable load and bidirectional interactive load in other distribution networks connected in parallel with the local distribution network; The first target value is expressed by the following formula: Δf A 1 CE,e =k ACE,1 Δf ACE,1e +k ACE,2 Δf ACE,2e +k ACE,3 Δf ACE,3e +k ACE,4 Δf ACE,4e k ACE,1 +k ACE,2 +k ACE,3 +k ACE,4 =1 k ACE,1D +k ACE,1M =k ACE,1 k ACE,2D +k ACE,2M =k ACE,2 k ACE,3D +k ACE,3M =k ACE,3 k ACE,4D +k ACE,4M =k ACE,4 In the formula, k ACE,1D and k ACE,1M They represent the weight coefficients of the dispatch control and market bidding control of the AGC units in operation participating in load control, k ACE,2D and k ACE,2M They represent the weight coefficients of dispatch control and market bidding control for re-dispatching non-operating AGC units participating in secondary frequency regulation under typhoons, k ACE,3D and k ACE,3M They represent the weight coefficients of dispatching control and market bidding control of other distribution networks that are connected to the distribution network and participate in the secondary frequency regulation under typhoons through dispatching by the dispatching center, respectively. ACE,4D and k ACE,4M They respectively represent the weight coefficients of the dispatching control and market bidding control of the operating load participating in the secondary frequency regulation under typhoons through the dispatching center.

5. The method for controlling the load of a distribution network under a typhoon disaster according to claim 4, characterized in that: The second target value is expressed by the following formula: Where P FL represents the load loss caused by the fault, K2 represents the unit regulation power of the distribution network after dispatch, P ARR,1D and P ARR,1M They represent the frequency regulation power control of AGC units in the distribution network operation under typhoon based on dispatch control and market bidding control, P ARR,2D It represents the secondary frequency regulation power control amount determined by dispatching the operating load not participating in AGC operation in the distribution network under typhoon, P ARR,2M P represents the secondary frequency regulation power control amount purchased by the operating load in the distribution network based on market bidding control through market transactions, ARR,3D P represents the secondary frequency regulation power control amount of other distribution networks running in parallel with the distribution network under typhoon based on dispatch control, ARR,3M P represents the secondary frequency regulation power control amount purchased by other distribution networks operating in parallel with the distribution network through market transactions under typhoon conditions based on market bidding control, ARR,4D and P ARR,4M They respectively represent the secondary frequency regulation power control amount determined by dispatching the operating load in the distribution network during a typhoon based on dispatching control and market bidding control.

6. The method for controlling the load of a distribution network under a typhoon disaster according to claim 5, characterized in that: The step of calculating the scheduling demand of the secondary frequency modulation power corresponding to each control mode according to the first target value and the second target value includes: Performing equivalent calculation on the first target value and the second target value, and determining weight coefficients of each sub-frequency control deviation target value under different control modes; According to the weight coefficient, the dispatch demand value of the secondary frequency modulation power corresponding to each control mode is calculated.

7. The method for controlling the load of a distribution network under a typhoon disaster according to claim 6, characterized in that: The following formula is used to express the frequency regulation power control amount of the AGC unit in the distribution network operation under typhoon based on dispatching control: Where P FL Indicates failure load loss, represents the available frequency regulation power of the i-th AGC conventional synchronous generator set with secondary frequency regulation function in parallel operation with the local distribution network, k ACE,1D The weight coefficient of the dispatch control of the AGC units in operation participating in load control, Δf ACE,1e represents the first sub-frequency control deviation target value, represents the number of AGC traditional synchronous generator sets with secondary frequency regulation function in parallel operation with the local distribution network, and K2 represents the unit regulation power of the distribution network after dispatch; The following formula is used to express the frequency regulation power control amount of the AGC unit in the distribution network operation under typhoon based on market bidding control: Where P D1,n1 , P D1,n2 , P D1,n3 , P D1,n4 , P D1,n5 They represent the power increment obtained by one adjustment of interruptible load, reducible load, shiftable load, transferable load and bidirectional interactive load in other distribution networks connected in parallel with the local distribution network, N D1 、N D2 、N D3 、N D4 、N D5 They represent the number of interruptible loads, loads that can be cut, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network, respectively. ACE,1M Indicates the weight coefficient of market bidding control of the AGC units in operation participating in load control; The following formula is used to express the secondary frequency regulation power control amount determined by dispatching the operating load that does not participate in AGC operation in the distribution network under typhoon based on dispatching control: In the formula, It represents the available frequency regulation power of the jth AGC traditional synchronous generator set with secondary frequency regulation function and dispatchable in other distribution networks connected in parallel with the local distribution network. represents the number of AGC conventional synchronous generators with secondary frequency regulation function and dispatchable in other distribution networks that are not in operation and are connected in parallel with the local distribution network, k ACE,2D represents the weight coefficient of dispatch control for re-dispatching the non-operating AGC units participating in secondary frequency regulation under typhoon, Δf ACE,2e The second sub-frequency controls the deviation target value; The following formula is used to express the secondary frequency regulation power control amount purchased by the operating load in the distribution network based on market bidding control through market transactions: Where P D1,n1 , P D2,n2 , P D3,n3 , P D4,n4 , P D5,n5 They represent the power increment obtained by one adjustment of interruptible load, reducible load, shiftable load, transferable load and bidirectional interactive load in other distribution networks connected in parallel with the local distribution network, N D1 、N D2 、N D3 、N D4 、N D5 They represent the number of interruptible loads, loads that can be cut, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks connected in parallel with the local distribution network, respectively. ACE,2M It represents the weight coefficient of market bidding control for re-dispatching non-operating AGC units participating in secondary frequency regulation under typhoon; The following formula is used to calculate the secondary frequency regulation power control amount of other distribution networks running in parallel with the distribution network under typhoon control through dispatching: Where P A,m It represents the frequency modulation power input to the distribution network by the mth distribution network running in parallel with the local distribution network and participating in the secondary frequency modulation under the typhoon, N A represents the number of other distribution networks that are dispatched by the dispatch center to participate in secondary frequency regulation during typhoons and are connected in parallel with the distribution network, k ACE,3D The weight coefficient of the dispatching control of other distribution networks that are connected to the distribution network and participate in the secondary frequency regulation under typhoons through the dispatching center; The following formula is used to calculate the secondary frequency regulation power control amount purchased by other distribution networks operating in parallel with the distribution network through market transactions under typhoon conditions based on market bidding control: In the formula, k ACE,3M It represents the weight coefficient of market bidding control of other distribution networks that are connected to the distribution network and participate in the secondary frequency regulation under typhoons through the dispatching center; The following formula is used to determine the secondary frequency regulation power control amount based on the dispatching control of the operating load in the distribution network under typhoon: In the formula, They respectively represent the frequency regulation power output by interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally with other distribution networks that are connected in parallel with the local distribution network and have secondary frequency regulation functions. They represent the number of interruptible loads, loads that can be reduced, loads that can be shifted, loads that can be transferred, and loads that can interact bidirectionally in other distribution networks that are connected in parallel with the local distribution network and have secondary frequency regulation functions, respectively. ACE,4D K2 represents the weight coefficient of the dispatching control of the operating load participating in the secondary frequency regulation under typhoon through the dispatching center. C It represents the sum of the unit regulation power of other distribution networks that are connected to the local distribution network and participate in secondary frequency regulation under typhoons and are dispatched by the dispatch center; The following formula is used to determine the secondary frequency regulation power control amount based on the dispatch of the operating load in the distribution network under typhoon control based on market bidding: In the formula, k ACE,4M It represents the weight coefficient of the market bidding control of the operating load participating in the secondary frequency regulation during typhoons through the dispatching center.

8. A load control system for a distribution network under typhoon disasters, characterized in that: include: A target value decomposition module is used to calculate the frequency control deviation of the distribution network according to the frequency deviation caused by the failure and loss of load of the distribution line under the typhoon disaster, and decompose the target value of the frequency control deviation to obtain each sub-frequency control deviation target value; A first target value calculation module is used to set corresponding weight coefficients for each sub-frequency control deviation target value according to different control modes, and perform weighted summation on each sub-frequency control deviation target value to obtain a first target value of the frequency control deviation; A second target value calculation module is used to decompose the power demand value of the secondary frequency regulation of the distribution network in the typhoon according to the control mode, and obtain a second target value of the frequency control deviation according to the fault loss load; The scheduling demand calculation module is used to calculate the scheduling demand of the secondary frequency modulation power corresponding to each control mode according to the first target value and the second target value.

9. A computer 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 method according to any one of claims 1 to 7 are implemented.

10. 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 method according to any one of claims 1 to 7 are implemented.

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