Edge power supply and load matching scheduling method and system based on dynamic time slicing

Abstract

The application discloses a dynamic time slice-based edge power source and load matching scheduling method and system, belongs to the field of power system source and load matching scheduling, and realizes real-time collection of output power of an edge power source and load power of an edge load, energy aggregation through integration in a time slice, combination of a power source side energy sequence and load side power consumption sequence into one source and load energy sequence, sorting according to size, traversal of elements, matching and association of a power energy element and a load power consumption element when the accessed element is a power energy element and the next element is a load power consumption element, repetition of the operation after source and load energy sequence updating until source and load matching is completed, and establishment of a power supply path according to the matching relationship to complete power source and load matching scheduling. The scheme can effectively improve source and load matching precision and source and load collaborative control ability on a micro time scale, and further improve new energy power generation local consumption level and utilization on a macro time scale.

Description

TECHNICAL FIELD

[0001] The present application relates to power system source load matching scheduling technology, in particular to an edge-end power source load matching scheduling method and system based on dynamic time slicing. BACKGROUND

[0002] In recent years, with the global energy structure accelerating towards clean and low-carbon direction, the installed capacity of wind power and photovoltaic power generation continues to grow, and the power system has multiple power sources such as wind power, photovoltaic power, energy storage, and power grid. The power system needs to regulate the power supply of different power loads through source load matching. At present, in the field of power load source load matching, source load matching usually relies on the prediction and analysis of power output on the power side and power demand on the load side, which is mostly based on historical data and lacks effective perception and dynamic response capability for real-time data. Wind power and photovoltaic power generation have significant volatility and intermittency, making it difficult for traditional systems to adapt to their random output changes. The output prediction has great uncertainty, which manifests as inaccurate source load prediction and low source load matching degree. This static or semi-dynamic source load matching method based on prediction cannot adapt to the rapid changes of source load in actual operation, resulting in low utilization rate of new energy, waste of resources such as "abandoned wind and light", and reduction of overall operation efficiency and economy of the system. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the defects of insufficient prediction accuracy and low source load matching degree in the existing power system based on prediction analysis when dealing with unstable power sources, and to provide an edge-end power source load matching scheduling method and system based on dynamic time slicing, which improves the source load matching degree and the utilization rate of new energy power.

[0004] The technical solution adopted by the present application to solve the above technical problems is: an edge-end power source load matching scheduling method based on dynamic time slicing, comprising the following steps:

[0005] (1) Real-time collection of output power of multiple edge-end power sources and load power of multiple edge-end loads by edge-end sensing devices arranged on the power source side and the load side of the power system;

[0006] (2) Energy aggregation of the collected multiple output powers and multiple load powers by integrating in time slices to obtain a power side energy sequence composed of multiple edge-end power source energies and a load side energy consumption sequence composed of multiple edge-end load energy consumptions; and combining the power side energy sequence and the load side energy consumption sequence into a source load energy sequence;

[0007] (3) Based on the stable sorting algorithm, the elements in the source-load energy sequence are sorted in order of size, and when encountering power source energy elements and load power consumption elements with the same value, the power source energy element is placed on the larger value side of the sequence;

[0008] (4) Starting from the large value side of the source-load energy sequence, traverse the elements in sequence. When the element accessed is a power supply energy element and the next element is a load power consumption element, match and associate the power supply energy element with the load power consumption element, and perform the next step of source-load energy sequence update.

[0009] (5) Update the value of the power source energy element that has completed the matching association. The updated value is equal to the original value minus the matching associated load power consumption. Delete the load power consumption element that has completed the matching association from the source-load energy sequence, and complete the update of the source-load energy sequence;

[0010] (6) Repeat steps (3) to (5) until the source-load matching of power supply energy and load power consumption is completed;

[0011] (7) According to the source-load matching relationship between power source energy and load power consumption, the power supply path between the corresponding edge power source and edge load is established to complete the power source-load matching scheduling.

[0012] The output power of the edge power supply and the load power of the edge load are collected through the edge sensing equipment, and the confidence of the output power and load power is obtained.

[0013] Within the credible confidence range, the output power and load power are integrated in the time slice respectively.

[0014] The time slot range of the time slice is set according to the data collection, data transmission, program operation and power scheduling execution time of the edge sensor equipment.

[0015] Normalize the output power and load power.

[0016] The source-load energy sequence is traversed in sequence to establish a source-load matching relationship until the source-load matching is completed when there is no load power consumption element in the source-load energy sequence.

[0017] A time-division electric energy switch matrix is ​​constructed to represent the connectivity relationship between each edge power source and edge load within a specific time slot. The elements of the time-division electric energy switch matrix are initially set to 0. When a matching relationship is established between the power source energy element and the load power consumption element in the source-load energy sequence, the corresponding element in the time-division electric energy switch matrix is ​​set to 1.

[0018] The time-division electric energy switch matrix obtained after completing the source-load matching controls the switching of the corresponding circuit switches to establish a power supply path between the corresponding edge power source and the edge load.

[0019] The edge power source-load matching and dispatching system based on dynamic time slicing includes multiple edge power sources, multiple edge loads, and edge time-sharing switchgear that controls circuit switching between the edge power sources and the edge loads; each edge power source and edge load is equipped with an edge sensor device that collects power data in real time. The edge sensor device and the edge time-sharing switchgear are connected to the edge device controller, which performs source-load matching based on the collected power data, and controls the corresponding switches in the edge time-sharing switchgear to establish a matching power supply path between the edge power source and the edge load.

[0020] The edge power supply includes photovoltaic power supply, wind power supply, energy storage power supply and grid power supply.

[0021] The beneficial effects of the present invention are: real-time collection of power output and load power on the power supply side by edge devices, aggregation of power integration over time slices based on a time slicing mechanism, solving the matching relationship between edge power sources and edge loads based on a source-load matching algorithm, and flexibly connecting the appropriate power source and load through the established power supply path within the current time slice, ultimately achieving intelligent matching and flexible connection between sources and loads. This solution can effectively improve the accuracy of source-load matching and the ability to coordinate source and load control on a microscopic time scale, thereby improving the local consumption level and utilization rate of renewable energy power generation on a macroscopic time scale.

[0022] Based on the concept of dimensionality reduction, this invention combines the power source energy sequence and the load power consumption sequence into a single source-load energy sequence. This transforms the two-dimensional matrix problem of energy matching in a multi-source, multi-load system into a vector superposition problem in one-dimensional space. By repeatedly sorting and traversing the source-load sequence in one-dimensional space, this method effectively reduces computational complexity and avoids the combinatorial explosion problem that can occur in traditional two-dimensional matrix solutions. Building on the one-dimensional algorithm design, this method further introduces recursive thinking to recursively process the optimal matching of remaining power sources with load power consumption, achieving refined control over the dynamic matching of multi-source, multi-load systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the edge power source-load matching and dispatching system of the present invention.

[0024] Figure 2 It is a flow chart of the method of the present invention.

[0025] Figure 3 It is a schematic diagram of the topological structure of a time-division electric energy switch array of the present invention.

[0026] Figure 4 This is a wiring diagram of a time-division electric energy switch array of the present invention. DETAILED DESCRIPTION

[0027] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings and specific embodiments. The specific contents listed in the following embodiments are not limited to the technical features required to solve the technical problems to be solved by the technical solutions described in the claims. At the same time, the examples listed are only part of the present invention, not all embodiments.

[0028] The edge power source-load matching dispatching system of the present invention is as follows Figure 1 As shown, it includes multiple edge power supplies, multiple edge loads, edge sensing equipment, edge time-sharing switch cabinets and edge equipment controllers.

[0029] Edge power sources include photovoltaic power sources, wind power sources, energy storage power sources, grid power sources, etc. Among them, photovoltaic power sources and wind power sources are new energy and unstable power, while energy storage power sources and grid power sources are stable power.

[0030] The edge load can contain multiple loads. Figure 1 Only four loads (load a, load b, load c, and energy storage load) are shown.

[0031] Edge sensing equipment includes edge power sensors for power sources and edge loads. Edge power sensors, such as photovoltaic and wind power sensors, collect power from edge power sources in real time and report this data and confidence level in real time. Edge load sensors, such as load power sensors and energy storage load power sensors, collect power from edge loads in real time and report this data and confidence level in real time. The confidence level is the reliability assessment of the power data collected by the power sensor and is reported along with the power data.

[0032] The edge device controller is connected to the edge sensing device and the edge time-division switch cabinet, receives the power data and confidence level of each power sensor, performs source-load matching based on the collected power data, and controls the edge time-division switch cabinet to flexibly connect the source and load based on the source-load matching results.

[0033] The edge time-sharing switchgear houses a time-sharing power switch array, which provides a flexible physical connection between the edge power source and the edge load. Based on the switch commands and switch array values ​​issued by the edge device controller, the corresponding switches are switched on and off, flexibly physically connecting the power source and the load.

[0034] The edge power source-load matching scheduling method of the present invention comprises the following steps:

[0035] 1. Use edge power sensors installed on the power supply side of the power system to collect the output power of multiple edge power sources, such as photovoltaic and wind power. The edge power sensors collect and report the edge power data and confidence level to the edge device controller in real time.

[0036] The edge load power sensors arranged at the load side collect the load powers of the plurality of edge loads, for example Figure 1 The edge load power sensors collect and report the edge load side power data and confidence to the edge device controller in real time.

[0037] 2. The edge device controller receives the output power and confidence data of the edge power source side, and the load power and confidence data of the edge load side in real time.

[0038] Within the range of confidence, the edge device controller aggregates the plurality of output powers and the plurality of load powers by integrating in time slices, respectively, to obtain statistically representative power source side energy and load side energy, providing data elements for subsequent energy matching. Regarding the time slice range of integration, for unstable power sources (such as wind power and photovoltaic), the power fluctuates greatly, so in the ideal state, the smaller the time slice, the more accurate the energy integration of instantaneous power in this time slice, and the higher the accuracy of subsequent source-load matching. However, practical application needs to consider data collection time, reporting time, message interaction time, program execution time, and switch cabinet execution time, etc., therefore, the time slice range can be set according to the data collection time of edge sensor devices, data transmission, program running, and power dispatching execution time.

[0039] 3. After energy aggregation, the energy data of the plurality of edge power sources and the power consumption data of the plurality of edge loads are obtained, and the corresponding power source side energy column vector P and load side power consumption column vector L are obtained. The source-load matching problem of edge power sources and edge loads is how to reasonably distribute each kind of power to the power load in a micro time scale. Figure 1 Taking the system of 4 edge power sources and 4 edge loads as shown in Figure 3 The topology structure of the system can be modeled as a 4-input (source) 4-output (load) time-division electric energy switch array as shown in

[0040]

[0041] where S is a 4×4 time-division electric energy switch matrix, L is a load side power consumption column vector, and P is a power source side energy column vector, as follows:

[0042]

[0043] In order to avoid power flow conflicts caused by multiple power sources, it is stipulated that any power source can drive multiple loads at the same time, but each load can only be powered by one power source at the same time. Each element in takes the value 0 or 1 and satisfies the column constraint: for any column , there is only one row index satisfy ,This constraint ensures that any load can only be supplied by one power source at a specific moment, ,thereby avoiding the power flow conflict problem caused by multiple sources ,of energy supply.

[0044]

[0045] Source-load matching is the process of solving this time-division power switching matrix S. The elements of the time-division power switching matrix S are initialized to 0. When an edge load is determined to be powered by an edge power source, the corresponding element in the matrix S is set to 1. Each power source is properly allocated to the load. Once all four power sources are properly allocated to the load, the time-division power switching matrix S that satisfies the constraints is obtained. This matrix represents the matching relationship between sources and loads in that time slot.

[0046] In order to solve the combinatorial explosion problem that may occur during the two-dimensional matrix solution process, the present invention adopts the following method to perform source-load matching. First, the power-side energy sequence composed of multiple edge power energies obtained by integration and the load-side power consumption sequence composed of multiple edge load power consumptions are merged to form a unified source-load energy sequence. Then, based on a stable sorting algorithm, the elements in the source-load energy sequence are sorted in order of size, and when encountering power energy elements and load power consumption elements with the same numerical value, the power energy element is placed on the larger value side of the sequence. For example, in one embodiment, the source-load energy sequence is arranged in ascending order based on a stable sorting algorithm, with small values ​​on the left and large values ​​on the right in the sequence. For power energy and load power consumption with the same numerical value, the power energy should be placed on the right side of the load power consumption. Next, we traverse the elements of the source-load energy sequence starting from the largest value side. For example, in the case of the largest value on the right, we traverse the source-load sequence from right to left. If the element we access is a power source energy element and the next element (the adjacent element on the left) is a load power consumption element, we determine that the power source energy can meet the load power consumption requirement. We then match and associate the power source energy element with the load power consumption element, indicating that the edge power source corresponding to the element can supply power to the corresponding edge load. Based on this matching result, the corresponding switch bit in the time-division power switch matrix is ​​set to 1, indicating that a power supply path has been established. The above example is sorted in ascending order. When using a descending stable sort, smaller values ​​are on the right and larger values ​​are on the left. Subsequently, we need to traverse the source-load energy sequence from left to right.

[0047] 4. After a power supply match is completed between an edge load and an edge source, the source-load energy sequence needs to be updated. This update is performed by updating the value of the energy element of the matched source. The updated value is equal to the original value minus the power consumption of the matched load, indicating that the source is still capable of supplying power to other loads. At the same time, the power consumption element of the matched load is deleted from the source-load energy sequence, indicating that its power supply needs have been met and it no longer needs to participate in the subsequent traversal and matching process.

[0048] 5. After completing the update of the source-load energy sequence, based on the recursive idea, the updated source-load energy sequence is re-matched according to the above process, and the above steps 3-4 are repeated. That is, after the stable sorting, the new source-load energy sequence is continued to be traversed to find the next round of possible power supply-load effective power supply matching relationship, and then the source-load energy sequence is updated again. Through this recursive mechanism, the system can automatically enter the next level of matching iteration after the current matching is completed, until all loads in the source-load energy sequence that meet the power supply constraints are matched. That is, when there are no load power consumption elements in the source-load energy sequence, the source-load matching of power supply energy and load power consumption is completed.

[0049] 6. After the source-load matching is completed, the generated time-division electric energy switch matrix represents the source-load matching relationship between the power source energy and the load power consumption. The edge device controller sends a control command to the edge time-division switch cabinet based on the time-division electric energy switch matrix. The edge time-division switch cabinet receives the command and parses the time-division electric energy switch array value, switches the switch array inside the switch cabinet to the corresponding position, establishes the power supply path between the corresponding edge power source and the edge load, flexibly connects the power source and the load, and completes the power source-load matching scheduling.

[0050] Figure 4 for Figure 3 The wiring diagram of the time-sharing power switch array in the illustrated topology shows multiple edge-end time-sharing switch cabinets corresponding to different edge-end loads. Each edge-end time-sharing switch cabinet houses a corresponding switch array. The edge device controller controls the corresponding edge-end time-sharing switch cabinets to perform power dispatch based on the source-load matching results. The above embodiment describes a four-source, four-load system, but the present invention is not limited to this and can be adapted to other complex systems with multiple sources and loads, varying the number of edge power sources and loads.

[0051] The algorithm design of the present invention is based on the idea of ​​dimensionality reduction, reducing the multi-source and multi-load two-dimensional matrix problem to a one-dimensional problem. By introducing an equivalent power mapping model, the energy matching relationship in the multi-source and multi-load system is converted into a vector superposition problem in a one-dimensional space. It first normalizes the power characteristics of the power supply side and the load side to construct a unified energy feature dimension; then, the source-load matching relationship is mapped to this one-dimensional feature space, and the source-load sequence is sorted and traversed multiple times in the one-dimensional space. Ultimately, while solving the combinatorial explosion problem, the scalability of the algorithm can be significantly improved. Based on the one-dimensional space algorithm design, the recursive idea is further introduced and modeled as a recursive solution problem with scope reduction and structural similarity. By constructing a hierarchical iterative energy matching mechanism, the overall energy matching problem is decomposed into several sub-problems, and the optimal matching of the remaining power of the power supply and the power consumption of the load is recursively processed at each level, achieving refined control of the dynamic matching of the multi-source and multi-load system.

[0052] The above description of the specific embodiments is only used to help understand the technical concept and core ideas of the present invention. Although specific preferred embodiments are used herein to describe and illustrate the technical solutions, they should not be understood as limiting the present invention itself. Those skilled in the art may make various changes in form and details without departing from the technical concept of the present invention. These easily conceived changes or substitutions should all be included within the scope of protection of the present invention.

Claims

1. A method for dispatching edge power source and load matching based on dynamic time slicing, characterized by: The following steps are involved: (1) Using edge-end sensor equipment installed on the power supply side and the load side of the power system to respectively collect the output power of multiple edge-end power sources and the load power of multiple edge-end loads in real time; (2) Aggregate the collected multiple output powers and multiple load powers by integrating them in time slices, and obtain a power supply side energy sequence consisting of multiple edge power supply energies and a load side power consumption sequence consisting of multiple edge load power consumptions; merge the power supply side energy sequence and the load side power consumption sequence into a source-load energy sequence; (3) Based on the stable sorting algorithm, the elements in the source-load energy sequence are sorted in order of size, and when encountering power source energy elements and load power consumption elements with the same value, the power source energy element is placed on the larger value side of the sequence; (4) Starting from the large value side of the source-load energy sequence, traverse the elements in sequence. When the element accessed is a power supply energy element and the next element is a load power consumption element, match and associate the power supply energy element with the load power consumption element, and perform the next step of source-load energy sequence update. (5) Update the value of the power source energy element that has completed the matching association. The updated value is equal to the original value minus the matching associated load power consumption. Delete the load power consumption element that has completed the matching association from the source-load energy sequence, and complete the update of the source-load energy sequence; (6) Repeat steps (3) to (5) until the source-load matching of power supply energy and load power consumption is completed; (7) According to the source-load matching relationship between power source energy and load power consumption, the power supply path between the corresponding edge power source and edge load is established to complete the power source-load matching scheduling.

2. The method for dispatching edge power source and load matching based on dynamic time slicing according to claim 1, characterized in that: The output power of the edge power supply and the load power of the edge load are collected through the edge sensing equipment, and the confidence of the output power and load power is obtained.

3. The method for dispatching edge power source and load matching based on dynamic time slicing according to claim 2, characterized in that: Within the credible confidence range, the output power and load power are integrated in the time slice respectively.

4. The method for dispatching edge power source and load matching based on dynamic time slicing according to claim 1, characterized in that: The time slot range of the time slice is set according to the data collection, data transmission, program operation and power scheduling execution time of the edge sensor equipment.

5. The method for dispatching edge power source and load matching based on dynamic time slicing according to claim 1, characterized in that: Normalize the output power and load power.

6. The method for dispatching edge power source and load matching based on dynamic time slicing according to claim 1, characterized in that: The source-load energy sequence is traversed in sequence to establish a source-load matching relationship until the source-load matching is completed when there is no load power consumption element in the source-load energy sequence.

7. The method for dispatching edge power source and load matching based on dynamic time slicing according to claim 1, characterized in that: A time-division electric energy switch matrix is ​​constructed to represent the connectivity relationship between each edge power source and edge load within a specific time slot. The elements of the time-division electric energy switch matrix are initially set to 0. When a matching relationship is established between the power source energy element and the load power consumption element in the source-load energy sequence, the corresponding element in the time-division electric energy switch matrix is ​​set to 1.

8. The method for dispatching edge power source and load matching based on dynamic time slicing according to claim 7, characterized in that: The time-division electric energy switch matrix obtained after completing the source-load matching controls the switching of the corresponding circuit switches to establish a power supply path between the corresponding edge power source and the edge load.

9. A dispatching system using the edge power source-load matching dispatching method based on dynamic time slicing according to any one of claims 1 to 8, characterized in that: It includes multiple edge power sources, multiple edge loads, and an edge time-sharing switch cabinet that controls the circuit switching between the edge power sources and the edge loads; each edge power source and edge load is equipped with an edge sensing device that collects power data in real time. The edge sensing device and the edge time-sharing switch cabinet are connected to the edge device controller, which matches the source and load based on the collected power data, and controls the corresponding switches in the edge time-sharing switch cabinet to establish a matching power supply path between the edge power source and the edge load.

10. The dispatching system according to claim 9, wherein: The edge power supply includes photovoltaic power supply, wind power supply, energy storage power supply and grid power supply.

Images