Wind, light and storage on-site balance contribution degree calculation method and system based on proportional distribution principle

Abstract

A method and system for calculating the contribution of wind-solar-storage on-site balance based on the principle of proportional allocation is proposed. The method includes: defining the composition of the wind-solar-storage on-site balance system and constructing a model of the system; combining regulation resources into different resource regulation schemes and implementing them into the model; evaluating the model based on three indicators: safety, active power balance, and reactive power balance; and performing power flow tracking based on the evaluation results of the three indicators for each resource regulation scheme, obtaining the contribution of each regulation resource to the three indicators within each scheme. This invention ensures comprehensive evaluation without overly complex indicators, allowing for the determination of the contribution of different regulation resources to a specific indicator under their combined action, thus characterizing the relative importance of resources.

Description

Technical Field

[0001] This invention belongs to the field of new energy power grid technology, and relates to a method and system for calculating the local balance contribution of wind, solar and energy storage based on the principle of proportional allocation. Background Technology

[0002] The volatility and uncertainty of wind and solar power output in high-proportion renewable energy power systems significantly impact power balance. In traditional power systems, load fluctuations are typically balanced by controlling conventional generating units. However, in high-proportion renewable energy power systems, renewable energy output fluctuates greatly and is uncertain, failing to match the load curve and thus increasing the regulation burden on conventional power sources. During off-peak periods, renewable energy output is high, making peak-shaving difficult; during peak periods, renewable energy output is low, necessitating grid-wide measures for controlled power consumption.

[0003] In the above situation, the solution is usually to use resources that can effectively regulate the imbalance of the power grid to achieve local balance. Therefore, it is crucial to determine the importance of different resources to local balance. The importance can be measured by assessing the contribution of resources to local balance. However, the existing contribution assessment technology uses relatively simple assessment indicators, which are not typical. Furthermore, when calculating the indicators, there are problems such as difficulty in obtaining the indicators and the indicators being unsuitable for balance contribution calculation. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a method and system for calculating the contribution of wind, solar, and energy storage to the local balance based on the principle of proportional allocation. In the local balance system model of wind, solar, and energy storage, considering effectiveness, safety, and sufficiency, the regulation effect of different regulation schemes is evaluated through three key indicators. The power flow tracing method based on the principle of proportional allocation is used to calculate the contribution of each component's regulation resources to a certain indicator, so as to realize the contribution analysis of different resources to the local balance under the combined effect of different resources.

[0005] The present invention adopts the following technical solution.

[0006] The method for calculating the in-situ balance contribution of wind, solar and energy storage based on the principle of proportional allocation includes the following steps:

[0007] Step 1: Define the components of the wind-solar-storage in-situ balance system and construct a model of the wind-solar-storage in-situ balance system;

[0008] Step 2: Combine the regulating resources into different resource regulating schemes and put them into the wind-solar-storage on-site balance system model. Evaluate the wind-solar-storage on-site balance system model based on three indicators: safety index, active power balance index, and reactive power balance index.

[0009] Step 3: Perform power flow tracking based on the proportional allocation principle on the evaluation results of the three indicators for each resource adjustment scheme. Based on the power flow tracking results, obtain the contribution of each adjustment resource to the three indicators in each resource adjustment scheme, and realize the contribution analysis and calculation of the on-site balance of wind, solar and energy storage under the joint action of different resources.

[0010] Preferably, in step 1, the wind-solar-storage on-site balancing system comprises load, power supply, and regulation resources.

[0011] Preferably, in step 2, the safety index, active power balance index, and reactive power balance index are respectively line power flow constraint (SAF), power adequacy ratio (ABU), and voltage deviation (VOF).

[0012] Preferably, the line power flow constraint (SAF) is:

[0013]

[0014] Where L is the set of all lines in the wind-solar-storage local balance system;

[0015] P dis,i The distance between the active power flow and the active power flow constraint boundary on line i;

[0016] P upper and P lower These are the upper and lower bounds of the active power flow constraint, respectively;

[0017] Q dis,i Let be the distance between the reactive power flow and the reactive power flow constraint boundary on line i;

[0018] Q upper and Q lower These are the upper and lower bounds of the reactive power flow constraint, respectively.

[0019] Preferably, the power adequacy ratio (ABU) is:

[0020]

[0021] Where E is the set of all power sources with backup capacity in the wind-solar-storage local balance system;

[0022] P k,spare Let be the reserve capacity of the k-th power source with reserve capacity under maximum load conditions;

[0023] P load,max This is the maximum load.

[0024] Preferably, the voltage offset VOF is:

[0025]

[0026] Where N is the set of all nodes in the wind-solar-storage in-situ balance system;

[0027] U l Let be the voltage at node l;

[0028] U N This is the standard voltage.

[0029] Preferably, in step 3, the regulating resources are equivalent to load, and the contribution is calculated using a power flow tracing method based on the proportional allocation principle according to the definitions of different indicators. Specifically, the power flow tracing based on the proportional allocation principle involves:

[0030] The proportional allocation principle is used to describe the relationship between power outflow and power inflow at the nodes of the wind-solar-storage on-site balance system. For a node, when the proportion of power flow into the node is determined, the proportion of power outflow from the inflow branch in each branch outflowing from the node is equal to the original proportion.

[0031] At a certain node, the proportion of any input line on any outgoing line is obtained by applying the proportional allocation principle. By tracing upwards layer by layer, the proportion P of any load j containing the output of any power source k can be obtained. j,k / P j Q j,k / Q j Similarly, the proportion P of any load j containing power flow from any line i can also be obtained. j,i / P j Q j,i / Q j ;

[0032] Among them, P j,k To consider the active power content of load j originating from power source k in power flow tracking;

[0033] P j To adjust the active component of the equivalent load of resource j;

[0034] Q j,k To account for the reactive power content originating from power source k in load j for power flow tracking;

[0035] Q j To adjust the reactive component in the equivalent load of resource j;

[0036] P j,i To consider the active power content originating from line i in load j for power flow tracking;

[0037] Q j,i To account for the reactive power content originating from line i in load j for power flow tracking.

[0038] Preferably, in step 3, the formula for calculating the contribution of the security index of the adjustment resources is:

[0039]

[0040] Where, ω SAF,j Contribution to the security index of the j-th regulating resource;

[0041] SAF j The current flow tracking result for the j-th regulating resource relative to the index SAF;

[0042] AD is the set of all regulating resources;

[0043] SAF j for:

[0044]

[0045] Where L is the set of all lines;

[0046] P dis,i The distance between the active power flow and the active power flow constraint boundary on line i;

[0047] P upper and P lower These are the upper and lower bounds of the active power flow constraint, respectively;

[0048] P j,i To consider the active power content originating from line i in load j for power flow tracking;

[0049] P j To adjust the active component of the equivalent load of resource j;

[0050] Q dis,i Let be the distance between the reactive power flow and the reactive power flow constraint boundary on line i;

[0051] Q upper and Q lower These are the upper and lower bounds of the reactive power flow constraint, respectively.

[0052] Q j,i To account for the reactive power content originating from line i in load j for power flow tracking; Q j To adjust the reactive component in the equivalent load of resource j.

[0053] Preferably, in step 3, the formula for calculating the contribution of the active power balance index of the adjustment resources is:

[0054]

[0055] Where, ω ABU,j Contribution to the active power balance index of the j-th resource;

[0056] ABUj The flow tracking result of the j-th resource relative to the ABU indicator;

[0057] AD is the set of all regulating resources;

[0058] ABU j The calculation method is as follows:

[0059]

[0060] Where E represents the set of all power sources with backup capacity;

[0061] P k,spare Let be the reserve capacity of the k-th power source under maximum load conditions;

[0062] P load,max Maximum load;

[0063] P j,k To consider the active power content originating from power source k in load j for power flow tracking; P j To adjust the active component of the equivalent load of resource j.

[0064] Preferably, in step 3, the method for calculating the contribution of the reactive power balance index of the adjustment resources is as follows:

[0065]

[0066] Where, ω VOF,j The contribution of the reactive power balance index to the j-th resource;

[0067] VOF j The flow tracking result of the j-th resource relative to the overall VOF (Value at VOF);

[0068] AD is the set of all regulating resources;

[0069] VOF j for:

[0070]

[0071] Where N is the set of all nodes;

[0072] U l Let be the voltage at node l;

[0073] U N Standard voltage;

[0074] Q j,l To consider the sum of reactive power content from all outgoing lines of node l in load j for power flow tracking;

[0075] Q jTo adjust the reactive component in the equivalent load of resource j.

[0076] A system for calculating the in-situ balance contribution of wind, solar and energy storage based on the principle of proportional allocation includes:

[0077] The model building module is used to define the components of the wind-solar-storage in-situ balance system and build a model of the wind-solar-storage in-situ balance system.

[0078] The indicator evaluation module is used to combine the adjustment resources into different resource adjustment schemes and put them into the wind-solar-storage on-site balance system model, and evaluate the wind-solar-storage on-site balance system model based on three indicators: safety indicator, active power balance indicator, and reactive power balance indicator.

[0079] The contribution analysis and calculation module is used to perform power flow tracking based on the proportional allocation principle on the evaluation results of the three indicators of each resource adjustment scheme. Based on the power flow tracking results, the contribution of each adjustment resource to the three indicators in each resource adjustment scheme is obtained, so as to realize the contribution analysis and calculation of the on-site balance of wind, solar and energy storage under the joint action of different resources.

[0080] A terminal includes a processor and a storage medium; the storage medium is used to store instructions.

[0081] The processor is configured to operate according to the instructions to execute the steps of the method.

[0082] A computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the method.

[0083] The beneficial effects of this invention are that, compared with the prior art,

[0084] The evaluation of local balance adjustment schemes is conducted from three aspects: safety, active power balance, and reactive power balance. This ensures a comprehensive evaluation perspective without making the indicators too complex.

[0085] Furthermore, the safety index, active power balance index, and reactive power balance index were selected as line power flow constraint (SAF), power adequacy ratio (ABU), and voltage deviation (VOF), respectively, making the selected indexes more representative.

[0086] By using a power flow tracking method based on the principle of proportional allocation to calculate the contribution of balance indicators, and adding power flow tracking results to the original indicator calculation method, we can obtain the contribution of each of the different regulatory resources to a certain indicator under the joint action of different resources, which can characterize the relative importance among resources. By combining the power flow tracking results with the balance assessment indicators, we can characterize the relative magnitude of the contribution of the regulatory resource set to the balance indicators.

[0087] Furthermore, when conducting power flow tracing analysis based on the proportional allocation principle, since power flow tracing can obtain the power transfer content relationship between power sources, lines, and loads, and various regulating resources act on the power system to regulate power balance, it is usually necessary to understand the relative magnitude of the degree of improvement of the overall balance by each component of the regulating resources. Therefore, the power flow tracing method based on the proportional allocation principle can be used to calculate the balance contribution. Attached Figure Description

[0088] Figure 1 This is a flowchart of the method for calculating the on-site balance contribution of wind, solar and energy storage based on the principle of proportional allocation in this invention;

[0089] Figure 2 This invention is based on the principle of proportional allocation for calculating the contribution of wind, solar and energy storage to on-site balance.

[0090] Figure 3 This is a schematic diagram of the method for calculating the contribution of security indicators in an embodiment of the present invention;

[0091] Figure 4 This is a schematic diagram of the active power balance index contribution calculation method in an embodiment of the present invention;

[0092] Figure 5 This is a schematic diagram of the method for calculating the contribution of reactive power balance index in an embodiment of the present invention. Detailed Implementation

[0093] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The embodiments described in this application are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, other embodiments obtained by those skilled in the art without creative effort are all within the protection scope of this invention.

[0094] like Figure 1 and 2 As shown, Embodiment 1 of the present invention provides a method for calculating the in-situ balance contribution of wind, solar and energy storage based on the principle of proportional allocation. In a preferred but non-limiting embodiment of the present invention, the method includes the following steps 1-3:

[0095] Step 1: Define the components of the wind-solar-storage in-situ balance system and construct a model of the wind-solar-storage in-situ balance system;

[0096] Specifically, for the wind-solar-storage on-site balance system to be studied, the composition of all parts of the system should be clarified and a model should be established. The types of components in the wind-solar-storage system should be classified into load, power source, regulation resources, etc. The established model is convenient for processing and obtaining the values ​​required for the indicators.

[0097] Step 2: Combine the regulating resources with regulating capabilities into different resource regulating schemes and put them into the wind-solar-storage on-site balance system model. Evaluate the wind-solar-storage on-site balance system model based on three indicators: safety index, active power balance index, and reactive power balance index.

[0098] This invention combines adjustment resources to obtain different resource adjustment schemes, and uses three key indicators: safety index, active power balance index, and reactive power balance index to evaluate various resource adjustment schemes.

[0099] More preferably, under a certain tidal current section, the specific meanings of the three key indicators are as follows:

[0100] (1): Safety indicators:

[0101] Line power flow constraint (SAF) reflects the fluctuation of line power flow in the system. It is defined as the sum of the ratios of the distance between each line power flow and the constraint boundary value to the length of the constraint interval.

[0102]

[0103] Where L is the set of all lines in the wind-solar-storage local balance system;

[0104] P dis,i Let P be the distance between the active power flow and the active power flow constraint boundary on line i. dis,i With P upper or P lower The absolute value of the difference between the two sides that are closer in distance;

[0105] P upper and P lower These are the upper and lower bounds of the active power flow constraint, respectively;

[0106] Q dis,i Let Q be the distance between the reactive power flow and the reactive power flow constraint boundary on line i. dis,i With Q upper Or Q lower The absolute value of the difference between the two sides that are closer in distance;

[0107] Q upper and Q lower These are the upper and lower bounds of the reactive power flow constraint, respectively.

[0108] (2): Active power balance index:

[0109] The Power Availability Unit (ABU) reflects the adequacy of the entire grid's generation capacity relative to power demand during a cycle. It is defined as the ratio of the grid's available reserve capacity to the maximum load.

[0110]

[0111] Where E is the set of all power sources with backup capacity in the wind-solar-storage local balance system;

[0112] P k,spare Let be the reserve capacity of the k-th power source with reserve capacity under maximum load conditions;

[0113] P load,max This is the maximum load.

[0114] (3): Reactive power balance index:

[0115] Voltage Deviation (VOF) reflects the effect of the reactive power balance of the entire network on voltage deviation. It is defined as the sum of the ratios of the distance between the voltage of each node and the standard voltage to the standard voltage.

[0116]

[0117] Where N is the set of all nodes in the wind-solar-storage in-situ balance system;

[0118] U l Let be the voltage at node l;

[0119] U N This is the standard voltage.

[0120] Step 3: Perform power flow tracking based on the proportional allocation principle on the evaluation results of the three indicators for each resource adjustment scheme. Based on the power flow tracking results, obtain the contribution of each adjustment resource to the three indicators in each resource adjustment scheme, and realize the on-site balance contribution of wind, solar and energy storage.

[0121] This invention uses the principle of proportional allocation to analyze three indicators of a certain regulation scheme. From the perspective of power flow tracking, it obtains a method for calculating the contribution of each regulation resource to the three indicators in the scheme.

[0122] More preferably, the power flow tracing based on the proportional allocation principle specifically includes:

[0123] The proportional allocation principle is used to describe the relationship between power outflow and power inflow at the nodes of the wind-solar-storage on-site balance system. For a node, when the proportion of power flow into the node is determined, the proportion of power outflow from the inflow branch in each branch outflowing from the node is equal to the original proportion.

[0124] At a certain node, the proportion of any input line on any outgoing line is obtained by applying the proportional allocation principle. By tracing upwards layer by layer, the proportion P of any load j containing the output of any power source k can be obtained. j,k / P j Q j,k / Q jSimilarly, the proportion P of any load j containing power flow from any line i can also be obtained. j,i / P j Q j,i / Q j ;

[0125] Among them, P j,k To consider the active power content of load j originating from power source k in power flow tracking;

[0126] P j To adjust the active component of the equivalent load of resource j;

[0127] Q j,k To account for the reactive power content originating from power source k in load j for power flow tracking;

[0128] Q j To adjust the reactive component in the equivalent load of resource j;

[0129] P j,i To consider the active power content originating from line i in load j for power flow tracking;

[0130] Q j,i To account for the reactive power content originating from line i in load j for power flow tracking.

[0131] The method for calculating the contribution of the balance index based on the power flow tracing method is as follows:

[0132] The adjustment resources are equivalent to the load, and the contribution is calculated using a power flow tracing method based on the principle of proportional allocation, according to the definition of different indicators.

[0133] The formula for calculating the contribution of the security index of the regulating resources is as follows:

[0134]

[0135] Where, ω SAF,j Contribution to the security index of the j-th regulating resource;

[0136] SAF j The current flow tracking result for the j-th regulating resource relative to the overall index SAF;

[0137] AD is the set of all regulating resources.

[0138] SAF j The calculation method is as follows:

[0139]

[0140] Where L is the set of all lines;

[0141] P dis,iThe distance between the active power flow and the active power flow constraint boundary on line i;

[0142] P upper and P lower These are the upper and lower bounds of the active power flow constraint, respectively;

[0143] P j,i To consider the active power content originating from line i in load j for power flow tracking;

[0144] P j To adjust the active component of the equivalent load of resource j;

[0145] Q dis,i Let be the distance between the reactive power flow and the reactive power flow constraint boundary on line i;

[0146] Q upper and Q lower These are the upper and lower bounds of the reactive power flow constraint, respectively.

[0147] Q j,i To account for the reactive power content originating from line i in load j for power flow tracking;

[0148] Q j To adjust the reactive component in the equivalent load of resource j.

[0149] Figure 3 A schematic diagram illustrating the calculation method for the contribution of safety indicators, where G1-G n For all power supplies, L1-L m For all loads, P i and Q i These represent the active and reactive power components of line i, respectively. j -L k This refers to all the adjustment resources in AD; the meanings of the remaining quantities are the same as above.

[0150] The formula for calculating the contribution of the active power balance index for regulating resources is as follows:

[0151]

[0152] Where, ω ABU,j Contribution to the active power balance index of the j-th resource;

[0153] ABU j The flow tracking result of the j-th resource relative to the total index ABU;

[0154] AD is the set of all regulating resources.

[0155] ABU j The calculation method is as follows:

[0156]

[0157] Where E represents the set of all power sources with backup capacity;

[0158] P k,spare Let be the reserve capacity of the k-th power source under maximum load conditions;

[0159] P load,max Maximum load;

[0160] P j,k To consider the active power content of load j originating from power source k in power flow tracking;

[0161] P j To adjust the active component of the equivalent load of resource j.

[0162] Figure 4 A schematic diagram illustrating the calculation method for the contribution of the active power balance index, where G1-G n For all power supplies, G i -G n For all power sources in set E, L1-L m For all loads, L j -L k This refers to all the adjustment resources in AD; the meanings of the remaining quantities are the same as above.

[0163] The calculation method for the contribution of reactive power balance index of regulating resources is as follows:

[0164]

[0165] Where, ω VOF,j The contribution of the reactive power balance index to the j-th resource;

[0166] VOF j The flow tracking result of the j-th resource relative to the overall VOF (Value at VOF);

[0167] AD is the set of all regulating resources.

[0168] VOF j The calculation method is as follows:

[0169]

[0170] Where N is the set of all nodes;

[0171] U l Let be the voltage at node l;

[0172] U N Standard voltage;

[0173] Q j,lTo consider the sum of reactive power content from all outgoing lines of node l in load j for power flow tracking;

[0174] Q j To adjust the reactive component in the equivalent load of resource j.

[0175] Figure 5 A schematic diagram illustrating the calculation method for the contribution of reactive power balance index, where G1-G n Let L be any node in set N, and let L1-L be all power sources. m For all loads, L j -L k This refers to all the adjustment resources in AD; the meanings of the remaining quantities are the same as above.

[0176] Embodiment 2 of the present invention provides a system for calculating the in-situ balance contribution of wind, solar and energy storage based on the principle of proportional allocation, comprising:

[0177] The model building module is used to define the components of the wind-solar-storage in-situ balance system and build a model of the wind-solar-storage in-situ balance system.

[0178] The indicator evaluation module is used to combine the regulating resources with regulating capabilities into different resource regulating schemes and put them into the wind-solar-storage on-site balance system model, and evaluate the wind-solar-storage on-site balance system model with three indicators: safety indicator, active power balance indicator, and reactive power balance indicator.

[0179] The contribution analysis and calculation module is used to perform power flow tracking based on the proportional allocation principle on the evaluation results of the three indicators of each resource adjustment scheme. Based on the power flow tracking results, the contribution of each adjustment resource to the three indicators in each resource adjustment scheme is obtained, so as to realize the contribution analysis and calculation of the on-site balance of wind, solar and energy storage under the joint action of different resources.

[0180] A terminal includes a processor and a storage medium; the storage medium is used to store instructions.

[0181] The processor is configured to operate according to the instructions to execute the steps of the method.

[0182] A computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the method.

[0183] The beneficial effect of this invention is that, compared with the prior art, the evaluation of the local balance regulation scheme is carried out from three aspects: safety, active power balance and reactive power balance indicators. This ensures the comprehensiveness of the evaluation perspective without setting the indicators too complexly.

[0184] Furthermore, the safety index, active power balance index, and reactive power balance index were selected as line power flow constraint (SAF), power adequacy ratio (ABU), and voltage deviation (VOF), respectively, making the selected indexes more representative.

[0185] By using a power flow tracking method based on the principle of proportional allocation to calculate the contribution of balance indicators, and adding power flow tracking results to the original indicator calculation method, we can obtain the contribution of each of the different regulatory resources to a certain indicator under the joint action of different resources, which can characterize the relative importance among resources. By combining the power flow tracking results with the balance assessment indicators, we can characterize the relative magnitude of the contribution of the regulatory resource set to the balance indicators.

[0186] Furthermore, when conducting power flow tracing analysis based on the proportional allocation principle, since power flow tracing can obtain the power transfer content relationship between power sources, lines, and loads, and various regulating resources act on the power system to regulate power balance, it is usually necessary to understand the relative magnitude of the degree of improvement of the overall balance by each component of the regulating resources. Therefore, the power flow tracing method based on the proportional allocation principle can be used to calculate the balance contribution.

[0187] This disclosure can be a system, method, and / or computer program product. A computer program product may include a computer-readable storage medium having computer-readable program instructions loaded thereon for causing a processor to implement various aspects of this disclosure.

[0188] Computer-readable storage media can be tangible devices capable of holding and storing instructions for use by an instruction execution device. Computer-readable storage media can be, for example—but not limited to—electrical storage devices, magnetic storage devices, optical storage devices, electromagnetic storage devices, semiconductor storage devices, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of computer-readable storage media include: portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), static random access memory (SRAM), portable compact disc read-only memory (CD-ROM), digital multifunction disc (DVD), memory sticks, floppy disks, mechanical encoding devices, such as punch cards or recessed protrusions storing instructions thereon, and any suitable combination of the foregoing. The computer-readable storage media used herein are not to be construed as transient signals themselves, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through waveguides or other transmission media (e.g., light pulses through fiber optic cables), or electrical signals transmitted through wires.

[0189] The computer-readable program instructions described herein can be downloaded from computer-readable storage media to various computing / processing devices, or downloaded via a network, such as the Internet, local area network, wide area network, and / or wireless network, to an external computer or external storage device. The network may include copper transmission cables, fiber optic transmission, wireless transmission, routers, firewalls, switches, gateway computers, and / or edge servers. A network adapter card or network interface in each computing / processing device receives the computer-readable program instructions from the network and forwards them to the computer-readable storage media in the respective computing / processing device.

[0190] Computer program instructions used to perform the operations of this disclosure may be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, status setting data, or source code or object code written in any combination of one or more programming languages, including object-oriented programming languages ​​such as Smalltalk, C++, etc., and conventional procedural programming languages ​​such as the "C" language or similar programming languages. The computer-readable program instructions may execute entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving a remote computer, the remote computer may be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or may be connected to an external computer (e.g., via the Internet using an Internet service provider). In some embodiments, electronic circuitry, such as programmable logic circuitry, field-programmable gate arrays (FPGAs), or programmable logic arrays (PLAs), is personalized by utilizing the status information of the computer-readable program instructions to implement various aspects of this disclosure.

[0191] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. A method for calculating the in-situ balance contribution of wind, solar and energy storage based on the principle of proportional allocation, characterized in that: The method includes the following steps: Step 1: Define the components of the wind-solar-storage on-site balancing system and construct a model of the wind-solar-storage on-site balancing system; the components of the wind-solar-storage on-site balancing system include load, power supply and regulation resources; Step 2: combine the adjustment resources into different resource adjustment schemes and put them into the wind-solar-storage local balance system model, and evaluate the safety index, active balance index and reactive balance index of the wind-solar-storage local balance system model; the safety index, active balance index and reactive balance index are respectively line flow constraints SAF, Power adequacy ABU, Voltage deviation degree VOF ; Step 3: Equivalent the regulating resources to load, perform power flow tracking based on the proportional allocation principle on the evaluation results of the three indicators of each resource regulating scheme, and obtain the contribution of each regulating resource to the three indicators in each resource regulating scheme based on the power flow tracking results, so as to realize the contribution analysis and calculation of the on-site balance of wind, solar and storage under the joint action of different resources. The formula for calculating the contribution of the security index of the regulated resources is as follows: in, ω SAF,j For the first j Contribution of each regulatory resource to security indicators; SAF j For the first j Individual adjustment resources relative to indicators SAF Trend tracking results; AD For the set of all regulating resources; SAF j for: in, L This is the set of all routes; P dis,i For the line i The distance between the active current flow and the boundary constrained by the active current flow; P upper and P lower These are the upper and lower bounds of the active power flow constraint, respectively. P j,i To consider the load of trend tracking j Source: Line i The active content; P j To regulate resources j The active component of the equivalent load; Q dis,i For the line i The distance between the reactive power flow and the reactive power flow constraint boundary; Q upper and Q lower These are the upper and lower bounds of the reactive power flow constraint, respectively. Q j,i To consider the load of trend tracking j Source: Line i The reactive power content; Q j To regulate resources j The reactive component in the equivalent load; The formula for calculating the contribution of the active power balance index for regulating resources is as follows: in, ω ABU,j For the first j The contribution of each resource to the active balance index; ABU j For the first j Individual resources relative to indicators ABU Trend tracking results; AD For the set of all regulating resources; ABU j The calculation method is as follows: in, E This refers to the collection of all power sources with backup capacity. P k,spare For the first k The backup capacity of a power source under maximum load conditions; P load,max Maximum load; P j,k To consider the load of trend tracking j Source of power k The active content; P j To regulate resources j The active component of the equivalent load; The calculation method for the contribution of reactive power balance index of regulating resources is as follows: in, ω VOF,j For the first j The contribution of each resource to the reactive power balance index; VOF j For the first j Individual resources relative to the overall index VOF Trend tracking results; AD For the set of all regulating resources; VOF j for: in, N The set of all nodes; U l For nodes l The voltage; U N Standard voltage; Q j,l To consider the load of trend tracking j The middle originates from the node l The sum of reactive power content of all outgoing lines; Q j To regulate resources j The reactive component in the equivalent load.

2. The method for calculating the in-situ balance contribution of wind, solar and energy storage based on the principle of proportional allocation according to claim 1, characterized in that: Line power flow constraints SAF for: in, L It is the collection of all lines in the wind-solar-storage local balance system; P dis,i For the line i The distance between the active current flow and the boundary constrained by the active current flow; P upper and P lower These are the upper and lower bounds of the active power flow constraint, respectively. Q dis,i For the line i The distance between the reactive power flow and the reactive power flow constraint boundary; Q upper and Q lower These are the upper and lower bounds of the reactive power flow constraint, respectively.

3. The method for calculating the in-situ balance contribution of wind, solar and energy storage based on the principle of proportional allocation according to claim 1, characterized in that: Power sufficiency ABU for: in, E It is the collection of all power sources with backup capacity in a wind-solar-storage local balancing system; P k,spare For the first k The backup capacity of a power supply with backup capacity under maximum load conditions; P load,max This is the maximum load.

4. The method for calculating the in-situ balance contribution of wind, solar and energy storage based on the principle of proportional allocation according to claim 1, characterized in that: Voltage offset VOF for: Where N is the set of all nodes in the wind-solar-storage in-situ balance system; U l For nodes l The voltage; U N This is the standard voltage.

5. The method for calculating the in-situ balance contribution of wind, solar and energy storage based on the principle of proportional allocation according to claim 1, characterized in that: In step 3, the contribution is calculated using a power flow tracing method based on the proportional allocation principle, according to the definitions of different indicators. Specifically, the power flow tracing based on the proportional allocation principle involves: The proportional allocation principle is used to describe the relationship between power outflow and power inflow at the nodes of the wind-solar-storage on-site balance system. For a node, when the proportion of power flow into the node is determined, the proportion of power outflow from the inflow branch in each branch outflowing from the node is equal to the original proportion. At a certain node, the proportion of content on any outgoing line and any incoming line can be obtained using the proportional allocation principle. By tracing upwards layer by layer, any load can be obtained. j Contains any power source k Power output ratio P j,k / P j , Q j,k / Q j Similarly, it can be obtained that any load j contains any line. i Trend proportions P j,i / P j , Q j,i / Q j ; in, P j,k To consider the load of trend tracking j Source of power k The active content; P j To regulate resources j The active component of the equivalent load; Q j,k To consider the load of trend tracking j Source of power k The reactive power content; Q j To regulate resources j The reactive component in the equivalent load; P j,i To consider the load of trend tracking j Source: Line i The active content; Q j,i To consider the load of trend tracking j Source: Line i The reactive power content.

6. A system for calculating the in-situ balance contribution of wind, solar and energy storage based on the principle of proportional allocation, used to implement the method described in any one of claims 1-5, characterized in that: The system includes: The model building module is used to define the components of the wind-solar-storage in-situ balance system and build a model of the wind-solar-storage in-situ balance system. The indicator evaluation module is used to combine the adjustment resources into different resource adjustment schemes and put them into the wind-solar-storage on-site balance system model, and evaluate the wind-solar-storage on-site balance system model based on three indicators: safety indicator, active power balance indicator, and reactive power balance indicator. The contribution analysis and calculation module is used to perform power flow tracking based on the proportional allocation principle on the evaluation results of the three indicators of each resource adjustment scheme. Based on the power flow tracking results, the contribution of each adjustment resource to the three indicators in each resource adjustment scheme is obtained, so as to realize the contribution analysis and calculation of the on-site balance of wind, solar and energy storage under the joint action of different resources.

7. A terminal, comprising a processor and a storage medium; characterized in that: The storage medium is used to store instructions; The processor is configured to operate according to the instructions to perform the steps of the method according to any one of claims 1-5.

8. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the method according to any one of claims 1-5.

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