A power monitoring system for distribution boxes

Abstract

The present invention relates to the field of power monitoring technology, and in particular to a power monitoring system for a distribution box. The system obtains the power load data of each output circuit in the distribution box through a data acquisition module, obtains the inelastic load degree and the elastic load degree according to the distribution of the power load data in a time series integrated load function acquisition module, and then obtains the time series integrated load function of the output circuit; in the power dispatching function acquisition module, a comprehensive power dispatching function is constructed based on the time series integrated load function, and finally the comprehensive power dispatching function is solved in the data processing module to obtain the output circuit to be dispatched at the current time when dispatching is required and its dispatched power load data. The present invention accurately and efficiently determines the dispatch of the power load in the distribution box by constructing and solving the comprehensive power dispatching function, thereby improving the efficiency and utilization of power dispatching and ensuring the stable operation of the power system.

Description

Technical Field

[0001] The present invention relates to the technical field of power monitoring, and in particular to a power monitoring system for a distribution box. Background Art

[0002] Distribution boxes are key components of power systems, primarily used to distribute electricity from the main power source to various loads. They are widely used in various scenarios, including homes, commercial buildings, and industrial parks, to ensure stable power supply and distribution. Through multiple output circuits, distribution boxes provide independent power sources for different loads, ensuring that each power-consuming area receives sufficient power according to demand. Therefore, in complex power usage environments, efficient scheduling and distribution of power is key to ensuring stable power system operation.

[0003] In existing methods, power load scheduling within distribution boxes relies on pre-set output configurations, using fixed output circuits and load distribution. However, in reality, the power load demands of multiple output circuits within a distribution box are highly variable, and power load changes are sudden. Therefore, existing methods cannot accurately monitor the power load of output circuits in a timely manner. This can easily lead to irrational power distribution, inefficient power distribution, and even the risk of overloading output circuits, resulting in wasted power resources and a failure to ensure stable power system operation. Summary of the Invention

[0004] In order to solve the technical problem that the power load distribution of the output circuit in the distribution box is inaccurate, resulting in the unstable operation of the power system, the purpose of the present invention is to provide a distribution box power monitoring system. The technical solution adopted is as follows:

[0005] In a first aspect, an embodiment of the present invention provides a distribution box power monitoring system, the system comprising the following steps:

[0006] The data acquisition module is used to obtain the power load data of each output circuit in the distribution box at each moment in the current time period;

[0007] A time-series integrated load function acquisition module is used to obtain the inelastic load degree and elastic load degree of each output circuit at each moment based on the distribution of the power load data of each output circuit; and to obtain the time-series integrated load function of each output circuit based on the change in the elastic load degree and the magnitude of the inelastic load degree within a preset neighborhood of each output circuit at each moment, as well as the proportion of the scheduled power load data of each output circuit at each moment;

[0008] The power dispatch function acquisition module is used to construct a comprehensive power dispatch function based on the dispatch status of each output circuit at the current dispatch time and the time series comprehensive load function of each output circuit;

[0009] The data processing module is used to obtain the dispatched output circuit and the dispatched power load data of each dispatched output circuit at the current dispatching time based on the comprehensive power dispatching function and its constraints.

[0010] Furthermore, the method for obtaining the inelastic load degree and the elastic load degree of each output circuit at each moment according to the distribution of the power load data of each output circuit is:

[0011] Fitting the power load data of each output circuit in the current time period into a curve according to the time sequence as the power load signal of each output circuit;

[0012] Decompose the power load signal of each output circuit using the EMD algorithm to obtain the IMF components and residual terms corresponding to each output circuit;

[0013] Obtain the degree of inelastic load of each output circuit at each moment based on the difference between the data change at each moment in each IMF component corresponding to each output circuit and the overall data change, the data at each moment in each IMF component and the residual term, and the power load data at each moment in the power load signal of each output circuit;

[0014] The elastic load degree of each output circuit at each moment is obtained based on the data at each moment in each IMF component corresponding to each output circuit and its difference from the overall data, as well as the power load data at each moment in the power load signal of each output circuit.

[0015] Furthermore, the method for obtaining the inelastic load degree is:

[0016] For any IMF component corresponding to any output circuit, obtain the ratio of the data at each moment in the IMF component to the data at the previous adjacent moment as the power growth degree value at the corresponding moment;

[0017] For any moment in the current time period, obtain the difference between the power growth degree value at that moment in the IMF component and the average of the power growth degree values ​​at all moments in the IMF component as the first difference;

[0018] When the first difference is greater than or equal to a preset first difference threshold, the inelastic determination value of the IMF component at this moment is set to 0;

[0019] When the first difference is less than the preset first difference threshold, the inelastic decision value of the IMF component at this moment is set to 1;

[0020] The product of the data of the IMF component at the moment and the inelastic determination value is used as the inelastic power reference value of the IMF component at the moment;

[0021] The sum of the inelastic power reference values ​​of all IMF components corresponding to the output circuit at the moment is used as the first result of the output circuit at the moment;

[0022] The sum of the first result and the data of the residual term corresponding to the output circuit at the moment is used as the inelastic overall power reference value of the output circuit at the moment;

[0023] The ratio of the inelastic overall power reference value to the power load data of the power load signal of the output circuit at that moment is used as the inelastic load degree of the output circuit at that moment.

[0024] Furthermore, the method for obtaining the elastic load degree is:

[0025] For any IMF component corresponding to any output circuit, obtain the ratio of the mean value of all data in the IMF component to the data at each moment as the power stability reference value at the corresponding moment;

[0026] The result of negatively correlating and normalizing the power stability reference value at each moment in the IMF component is used as the second result at the corresponding moment;

[0027] Add the second result to the first preset constant and round down the result to an integer, and use the result as the elasticity determination value of the IMF component at the corresponding moment;

[0028] For any moment in the current time period, obtain the product of the elastic determination value of the IMF component at that moment and the data as the elastic power reference value of the IMF component at that moment;

[0029] The ratio of the sum of the elastic power reference values ​​of all IMF components corresponding to the output circuit at that moment to the power load data at that moment in the power load signal of the output circuit is used as the elastic load degree of the output circuit at that moment.

[0030] Furthermore, the method for obtaining the time series integrated load function is:

[0031] Obtain the comprehensive load parameters of each output circuit at each moment based on the change in the elastic load level and the size of the inelastic load level within the preset neighborhood of each output circuit at each moment, as well as the proportion of the dispatched power load data of each output circuit at each moment;

[0032] The comprehensive load parameters of each output circuit at each moment are fitted according to the time sequence to obtain the time series comprehensive load function of each output circuit.

[0033] Furthermore, the method for obtaining the comprehensive load parameters is:

[0034] For any output circuit and any moment in the current time period, obtaining the variance of the elastic load degree of the output circuit within a preset neighborhood at the moment as a first variance;

[0035] Obtaining, as a third result, a cumulative result of differences in elastic load levels of the output circuit between any two adjacent moments within a preset neighborhood at the moment;

[0036] Obtaining an elastic load parameter of the output circuit at the moment according to the first variance and the third result; wherein the first variance and the third result are both negatively correlated with the elastic load parameter;

[0037] Obtaining an average value of all inelastic load levels of the output circuit within a preset neighborhood at the moment as a first reference value;

[0038] The ratio of the scheduled power load data of the output circuit at the moment to the maximum power load data of the output circuit is used as the inelastic load adjustment weight of the output circuit at the moment;

[0039] Normalizing the product of the inelastic load adjustment weight and the first reference value, and using the result as the inelastic load parameter of the output circuit at the moment;

[0040] The average value of the elastic load parameter and the inelastic load parameter of the output circuit at the moment is used as the comprehensive load parameter of the output circuit at the moment.

[0041] Furthermore, the method for obtaining the comprehensive power dispatch function is:

[0042] For any output circuit, when the output circuit is scheduled at the current scheduling time, the scheduling reference value of the output circuit is set to 1;

[0043] When the output circuit is not scheduled at the current scheduling time, the scheduling reference value of the output circuit is set to 0;

[0044] The product of the scheduling reference value of the output circuit and the timing integrated load function is used as the participation function of the output circuit;

[0045] multiplying the first preset weight by the accumulated result of the scheduling reference values ​​of all output circuits as the scheduling target value;

[0046] The product of the second preset weight and the accumulated result of the participation functions of all output circuits is used as the objective function;

[0047] The function formed by adding the dispatch target value and the objective function is used as the comprehensive power dispatch function.

[0048] Furthermore, the constraints are:

[0049] The scheduled power load data of each output circuit to be scheduled cannot exceed the maximum power load data of the corresponding output circuit;

[0050] The sum of the dispatched power load data of all dispatched output circuits cannot exceed the maximum power load data output by the distribution box;

[0051] The sum of the dispatched power load data of all dispatched output circuits is equal to the demanded power load data.

[0052] Furthermore, the method for obtaining the output circuit to be scheduled and the scheduling power load data of each scheduled output circuit at the current scheduling time is:

[0053] When the comprehensive power dispatching function is minimized and meets the constraints, the dispatching power load data of the dispatched output circuit and each dispatched output circuit will be obtained as the dispatching power load data of the dispatched output circuit and each dispatched output circuit at the current dispatching moment.

[0054] In a second aspect, another embodiment of the present invention provides a distribution box, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the computer program, the steps of any one of the above methods are implemented.

[0055] The present invention has the following beneficial effects:

[0056] The present invention obtains the inelastic load degree and elastic load degree of each output circuit at each moment based on the distribution of the power load data of each output circuit, accurately reflects the inelastic load characteristics and elastic load characteristics of each output circuit at each moment, and is conducive to the subsequent accurate construction of a time-series comprehensive load function that reflects the schedulable power load degree of each output circuit at each moment, and then obtains the time-series comprehensive load function of each output circuit based on the change of the elastic load degree and the size of the inelastic load degree within the preset neighborhood of each output circuit at each moment, as well as the proportion of the scheduled power load data of each output circuit at each moment, which is conducive to accurately and efficiently reflecting the power load situation in each output circuit. , making the subsequent allocation of power load scheduling more reasonable; in order to accurately and timely schedule the power load in the distribution box, a comprehensive power scheduling function is constructed based on the scheduling situation of each output circuit at the current time when scheduling is required and the timing comprehensive load function of each output circuit, so as to cope with the variable power demand and sudden power load changes on the output circuit, and improve the efficiency of power scheduling and the utilization rate of power resources; in order to ensure the rationality of power scheduling, based on the comprehensive power scheduling function and its constraints, the scheduling power load data of the output circuits and each output circuit that are scheduled at the current time when scheduling is required is accurately and efficiently obtained, so as to realize timely scheduling of output power and ensure the stable operation of the power system in the distribution box. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0058] Figure 1 A structural block diagram of a power monitoring system for a distribution box provided by one embodiment of the present invention;

[0059] Figure 2 A flow chart of a method for obtaining an inelastic load degree and an elastic load degree provided by one embodiment of the present invention;

[0060] Figure 3 A flow chart of a method for obtaining a time series integrated load function provided by one embodiment of the present invention;

[0061] Figure 4 A schematic diagram of a computer device provided by one embodiment of the present invention. DETAILED DESCRIPTION

[0062] To further illustrate the technical means and effectiveness of the present invention in achieving its intended purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, describes in detail the specific implementation, structure, features, and effectiveness of a power monitoring system for a distribution box according to the present invention. In the following description, references to different "one embodiment" or "another embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.

[0063] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0064] The specific scheme of the power monitoring system for a distribution box provided by the present invention is described in detail below with reference to the accompanying drawings.

[0065] Example 1:

[0066] The specific scenario of this embodiment is as follows: the power scheduling in the existing distribution box relies on the preset output configuration, that is, the fixed output circuit and power load distribution, which cannot respond to the dynamic changes of the power load in real time. Since the scheduling power load data of the output circuit cannot be flexibly adjusted, the power load distribution efficiency is low, and there may be a situation where the power load of some output circuits is too large and the power load of some output circuits is too small. When the power load of the output circuit suddenly increases or decreases, the power load cannot be scheduled in real time. Therefore, this embodiment monitors the power load data of each output circuit in the distribution box in real time, analyzes the elastic load characteristics and inelastic load characteristics of each output circuit, and then accurately analyzes the power load situation of each output circuit in the distribution box, and then establishes a comprehensive power scheduling function to accurately and efficiently determine the output circuits that need to be scheduled in the distribution box and the scheduling power load data of each output circuit that needs to be scheduled.

[0067] This embodiment proposes a power monitoring system for a distribution box. Figure 1 , which shows a structural block diagram of a distribution box power monitoring system provided by an embodiment of the present invention. The system includes: a data acquisition module 10, a time series integrated load function acquisition module 20, a power scheduling function acquisition module 30, and a data processing module 40.

[0068] The data acquisition module 10 is used to obtain the power load data of each output circuit in the distribution box at each moment in the current time period.

[0069] Specifically, in order to properly load-output the power output from the distribution box, this embodiment requires real-time monitoring and analysis of the power load data for each output circuit in the distribution box, which facilitates the rational scheduling of the power load data in the output circuits. Therefore, this embodiment installs a power monitoring device on each output circuit and then obtains the power load data for each output circuit at each moment in real time. The power monitoring device on each output circuit synchronously collects the power load data. It should be noted that the power monitoring device in this embodiment is a voltage sensor. In order to timely schedule the power load conditions of the output circuits, this embodiment obtains the power load data for each output circuit in the distribution box at each moment in the current time period. This embodiment sets the current time period to 72 hours, where the end time of the current time period is always the current moment. The time interval between two adjacent moments of power load data collection is set to 0.1 seconds. The implementer can set the current time period and the time interval between two adjacent moments of power load data collection based on actual conditions, and this is not limited here.

[0070] In order to ensure the accuracy of subsequent analysis, this embodiment preprocesses the acquired power load data, that is, cleans and standardizes the power load data to make it suitable for subsequent analysis and modeling. Among them, the process of preprocessing the power load data is: first, use the interpolation method to fill in the missing power load data of each output circuit in the current time period; then use a filter such as Kalman filtering to smooth the power load data of each output circuit in the current time period to remove noise points; finally, scale the power load data of each output circuit in the current time period to a fixed range, which is 0 to 1 in this embodiment. Among them, interpolation and filter filtering are both well-known technologies and will not be described in detail. It should be noted that the power load data that appear subsequently are all preprocessed power load data.

[0071] The timing integrated load function acquisition module 20 is used to obtain the inelastic load degree and elastic load degree of each output circuit at each moment according to the distribution of the power load data of each output circuit; and to obtain the timing integrated load function of each output circuit according to the change of the elastic load degree and the size of the inelastic load degree within the preset neighborhood of each output circuit at each moment, as well as the proportion of the scheduled power load data of each output circuit at each moment.

[0072] Specifically, the purpose of real-time monitoring of the power load data for each output circuit in a distribution box is to better schedule power output and achieve efficient power distribution. It is known that the power load of an output circuit has two distinct characteristics: elastic load characteristics and inelastic load characteristics. In a power system, elastic loads possess a certain degree of flexibility and responsiveness, enabling them to adjust according to grid demand or power supply conditions. Inelastic loads are loads that lack a clear response or ability to adjust to grid voltage, frequency, or other transient changes. Typically, elastic loads are rigid, with power consumption that varies little within the power system, making them difficult to adjust based on external signals or grid conditions. Therefore, when scheduling power loads for output circuits, accurate monitoring of both elastic and inelastic load characteristics is crucial to facilitate efficient scheduling of output circuit power load data. In a distribution box, each output circuit does not exhibit a single, fixed load pattern, but rather a mixture of elastic and inelastic load characteristics, often with some seasonal regression. For example, a certain output circuit in a distribution box corresponds to a typical household that consumes electricity. This household may have some elastic loads, such as air conditioners, charging equipment, and energy storage devices, as well as some inelastic loads, such as electric heaters, continuous lighting, and refrigerators. Therefore, it is necessary to monitor the elastic and inelastic load characteristics of this output circuit to more efficiently distribute electricity in the distribution box. In order to accurately reflect the elastic and inelastic load characteristics of each output circuit, this embodiment analyzes the distribution of power load data for each output circuit in the current time period, and then obtains the inelastic load level and elastic load level of each output circuit at each moment.

[0073] In actual situations, when the elastic load component of a certain output circuit is relatively stable within a preset neighborhood at a certain moment, it indicates that the impact of the output circuit being scheduled at that moment is smaller, and the load's ability to resist shock is stronger. It is known that the inelastic load level is continuously stable. When the inelastic load level of the output circuit within the preset neighborhood at that moment is greater, it indirectly indicates that the load's ability to resist shock is stronger at that moment. Considering that the larger the scheduled load data, the greater the impact on the inelastic load level, this embodiment uses the proportion of the scheduled power load data of the output circuit at that moment in the power load data of the output circuit as a weight, and weights the inelastic load level of the output circuit within the preset neighborhood at that moment, thereby accurately analyzing the comprehensive load situation of the output circuit at that moment, so that the subsequent accurate acquisition of the time series comprehensive load function of the output circuit in the current time period is conducive to the subsequent construction of a comprehensive power scheduling function, reasonable scheduling of the power data in the output circuit, and ensuring the stable operation of the distribution box. Furthermore, this embodiment obtains the time-series integrated load function of each output circuit based on the change in the elastic load degree and the size of the inelastic load degree within the preset neighborhood of each output circuit at each moment, as well as the proportion of the dispatched power load data of each output circuit at each moment. Among them, this embodiment sets the preset neighborhood of each moment to 10 minutes, and the starting time of the preset neighborhood of each moment is the corresponding moment, for example, the starting time of the preset neighborhood of the t-th moment is the t-th moment. The implementer can set the size of the preset neighborhood of each moment according to the actual situation, and it is not limited here. It should be noted that if a certain moment is a boundary moment and its preset neighborhood is less than 10 minutes, this embodiment divides the time range before the moment so that the preset neighborhood of the moment remains at 10 minutes.

[0074] Preferably, in one possible implementation of this embodiment, the method for obtaining the inelastic load degree and the elastic load degree can be found in Figure 2 , which shows a flow chart of a method for obtaining an inelastic load degree and an elastic load degree provided by this embodiment, the method comprising the following steps:

[0075] Step S201: Fitting the power load data of each output circuit in the current time period into a curve according to the time sequence as the power load signal of each output circuit.

[0076] The power load signal of each output circuit accurately reflects the distribution of power load data for each output circuit during the current time period, facilitating subsequent accurate analysis of the degree of inelastic load and elastic load for each output circuit at each moment. The curve fitting method is well known and will not be further described.

[0077] Step S202: Decompose the power load signal of each output circuit using the EMD algorithm to obtain the IMF components and residual terms corresponding to each output circuit.

[0078] In order to accurately analyze the degree of inelastic load and elastic load of each output circuit at each moment, the power load signal of each output circuit is decomposed using the empirical mode decomposition (EMD) algorithm to obtain the IMF components and residual terms corresponding to each output circuit, so as to analyze the inelastic load characteristics and elastic load characteristics of each output circuit.

[0079] The Empirical Mode Decomposition (EMD) algorithm is a well-known technology and will not be described in detail herein.

[0080] Step S203: Obtain the degree of inelastic load of each output circuit at each moment based on the difference between the data change at each moment in each IMF component corresponding to each output circuit and the overall data change, the data at each moment in each IMF component and residual term, and the power load data at each moment in the power load signal of each output circuit.

[0081] In an output circuit, the inelastic load characteristic is typically continuous and stable. Therefore, this embodiment first analyzes each IMF component corresponding to each output circuit. The more stable the data changes in an IMF component corresponding to a particular output circuit, the greater the reference value of that IMF component in analyzing the inelastic load characteristic of that output circuit. Furthermore, this embodiment first determines whether the data of each IMF component corresponding to each output circuit at each moment is reference-worthy for analyzing the inelastic load characteristic based on the difference between the data changes at each moment in each IMF component corresponding to each output circuit and the overall data changes. The degree of inelastic load for each output circuit at that moment is then determined based on the proportion of the data of the reference-worthy IMF components corresponding to each output circuit and the data of the residual items corresponding to each output circuit at that moment in the power load data of each output circuit at that moment during the inelastic load characteristic analysis. It should be noted that because the residual items corresponding to each output circuit vary steadily and slowly, fully conforming to the inelastic load characteristic of power, the residual items are assumed to be inelastic load characteristics. Furthermore, this embodiment obtains the degree of inelastic load of each output circuit at each moment based on the difference between the data change at each moment in each IMF component corresponding to each output circuit and the overall data change, the data at each moment in each IMF component and residual term, and the power load data at each moment in the power load signal of each output circuit.

[0082] Preferably, in one possible implementation of this embodiment, the method for obtaining the degree of inelastic load is as follows: for any IMF component corresponding to any output circuit, obtain the ratio of the data at each moment in the IMF component to the data at the previous adjacent moment, as the power growth degree value at the corresponding moment; for any moment in the current time period, obtain the absolute value of the difference between the power growth degree value at that moment in the IMF component and the average of the power growth degree values ​​at all moments in the IMF component, as the first difference; the larger the first difference, the greater the degree of change in the data in the IMF component at that moment, and the IMF component has no reference significance for analyzing the degree of inelastic load of the output circuit at that moment. Furthermore, this embodiment sets the preset first difference threshold to 0.5, and the implementer can set the size of the preset first difference threshold according to actual conditions, which is not limited here. When the first difference is greater than or equal to the preset first difference threshold, the inelastic judgment value of the IMF component at that moment is set to 0; when the first difference is less than the preset first difference threshold, the inelastic judgment value of the IMF component at that moment is set to 1;

[0083] To analyze the contribution of the IMF component data at that moment to the inelastic load level of the output circuit at that moment, the product of the IMF component data at that moment and the inelastic judgment value is used as the inelastic power reference value of the IMF component at that moment. A larger inelastic power reference value indicates a more pronounced inelastic load characteristic reflected by the IMF component at that moment. To obtain the inelastic load level of the output power at that moment, the sum of the inelastic power reference values ​​of all IMF components corresponding to the output circuit at that moment is used as the first result of the output circuit at that moment. The sum of the first result and the data at that moment in the residual term corresponding to the output circuit is used as the overall inelastic power reference value of the output circuit at that moment. Finally, the ratio of the overall inelastic power reference value to the power load data at that moment in the power load signal of the output circuit is used as the inelastic load level of the output circuit at that moment. It should be noted that the first moment in the current time period does not have a previous adjacent moment, so this embodiment does not analyze the first moment in the current time period.

[0084] The calculation formula for the inelastic load degree is: Where, is the inelastic load degree of the i-th output circuit at the t-th moment; is the number of IMF components corresponding to the i-th output circuit; is the inelastic decision value of the a-th IMF component corresponding to the i-th output circuit at the t-th moment; is the power growth value of the ath IMF component corresponding to the i-th output circuit at the t-th moment; is the mean value of the power growth degree at all moments in the a-th IMF component corresponding to the i-th output circuit; is the first difference; is the absolute value function; is the data of the ath IMF component corresponding to the i-th output circuit at the t-th moment; is the data of the residual term corresponding to the i-th output circuit at the t-th moment; is the power load data of the power load signal of the i-th output circuit at the t-th moment; is the inelastic power reference value of the ath IMF component corresponding to the i-th output circuit at the t-th moment; is the first result of the i-th output circuit at the t-th moment; is the inelastic overall power reference value of the i-th output circuit at the t-th moment.

[0085] At this point, the degree of inelastic load of each output circuit at each moment is obtained.

[0086] Step S204: Obtain the elastic load degree of each output circuit at each moment based on the data at each moment in each IMF component corresponding to each output circuit and its difference from the overall data, as well as the power load data at each moment in the power load signal of each output circuit.

[0087] It is known that elastic load has a significant variable characteristic. Because the use of various unstable electrical components can generate a significant transient power, specifically manifested in the data as a clear impulse response. Therefore, it is only necessary to analyze whether each IMF component corresponding to each output circuit has a significant impulse response at each moment to determine whether each IMF component is meaningful for analyzing the elastic load characteristics of the output circuit at each moment. Furthermore, this embodiment first analyzes the difference between the data at each moment in each IMF component corresponding to each output circuit and the other data in the IMF component to determine whether the data at each moment in each IMF component corresponding to each output circuit is meaningful for analyzing the elastic load characteristics. Then, based on the proportion of the sum of the data of the reference IMF components corresponding to each output circuit at the same moment in the power load data of the corresponding output circuit at the same moment during the elastic load characteristic analysis, the elastic load level of each output circuit at the corresponding moment is determined. Furthermore, this embodiment obtains the elastic load level of each output circuit at each moment based on the data at each moment in each IMF component corresponding to each output circuit and the difference between the data and the overall data, as well as the power load data at each moment in the power load signal of each output circuit.

[0088] Preferably, in one possible implementation of this embodiment, the method for obtaining the elastic load degree is: for any IMF component corresponding to any output circuit, obtain the ratio of the mean of all data in the IMF component to the data at each moment as the power stability reference value at the corresponding moment; when the power stability reference value is smaller, it means that the data of the IMF component at the corresponding moment is larger, which indirectly means that the elastic load characteristics of the IMF component at the corresponding moment are more obvious; in order to determine whether the IMF component has reference significance at each moment, this embodiment negatively correlates and normalizes the power stability reference value of the IMF component at each moment, and uses the result as the second result at the corresponding moment; then the second result is added to the first preset constant and rounded down to the integer value, which is used as the elastic judgment value of the IMF component at the corresponding moment; so that the elastic judgment value is 0 or 1. Among them, this embodiment sets the first preset constant to 0.5. The implementer can set the size of the first preset constant according to the actual situation. It is not limited here, but the first preset constant must be greater than 0 and less than 1;

[0089] To analyze the contribution of the IMF component's data at each moment to the elastic load level of the output circuit at that moment, the elasticity judgment value of the IMF component at that moment and the data are multiplied for each moment in the current time period. This is used as the elastic power reference value of the IMF component at that moment. The larger the elastic power reference value, the more pronounced the elastic load characteristics reflected by the IMF component at that moment. To determine the elastic load level of the output power at that moment, the ratio of the sum of the elastic power reference values ​​of all IMF components corresponding to the output circuit at that moment to the power load data at that moment in the power load signal of the output circuit is used as the elastic load level of the output circuit at that moment.

[0090] The calculation formula for the elastic load degree is: Where, is the elastic load level of the i-th output circuit at the t-th moment; is the number of IMF components corresponding to the i-th output circuit; is the elastic decision value of the a-th IMF component corresponding to the i-th output circuit at the t-th moment; is the data of the ath IMF component corresponding to the i-th output circuit at the t-th moment; is the power load data of the power load signal of the i-th output circuit at the t-th moment; is the mean of all data in the ath IMF component corresponding to the i-th output circuit; e is a natural constant; To round down to the nearest integer; is the power stability reference value of the a-th IMF component corresponding to the i-th output circuit at the t-th moment; is the second result of the a-th IMF component corresponding to the i-th output circuit at the t-th moment; is the elastic power reference value of the ath IMF component corresponding to the i-th output circuit at the t-th moment.

[0091] At this point, the elastic load level of each output circuit at each moment is obtained.

[0092] Preferably, in one possible implementation of this embodiment, the method for obtaining the time series integrated load function is as follows: Figure 3 , which shows a flow chart of a method for obtaining a time series integrated load function provided by this embodiment, the method comprising the following steps:

[0093] Step S301: Obtain the comprehensive load parameters of each output circuit at each moment based on the change in the elastic load level and the size of the inelastic load level of each output circuit within the preset neighborhood at each moment, as well as the proportion of the scheduled power load data of each output circuit at each moment.

[0094] As an example, for analysis, taking the i-th output circuit and the t-th moment in the current time period, the comprehensive load parameter of the i-th output circuit at the t-th moment refers to a comprehensive calculation of the changing trend of the elastic load degree and the weighted changing trend of the inelastic load degree of the i-th output circuit within a certain time range starting from the t-th moment. It is used to judge the degree of influence of the power load of the scheduled part of the i-th output circuit on the original i-th output circuit when the i-th output circuit is scheduled at the t-th moment. The larger the comprehensive load parameter of the i-th output circuit at the t-th moment, the stronger the load impact resistance of the i-th output circuit when the i-th output circuit is scheduled at the t-th moment.

[0095] Preferably, in one possible implementation of this embodiment, the method for obtaining the comprehensive load parameter is as follows: for any output circuit and any moment in the current time period, obtaining the variance of the elastic load degree of the output circuit within a preset neighborhood at that moment as a first variance; the smaller the first variance, the more stable the elastic load characteristic of the output circuit at that moment, indirectly indicating that the impact of the output circuit being scheduled at that moment is smaller; to further illustrate the stability of the elastic load of the output circuit at that moment, the cumulative result of the absolute value of the difference between the elastic load degrees of the output circuit between any two adjacent moments within the preset neighborhood at that moment is obtained as a third result; the smaller the third result, the more stable the elastic load characteristic of the output circuit at that moment, and the smaller the impact of the output circuit being scheduled at that moment, and then obtaining the elastic load parameter of the output circuit at that moment based on the first variance and the third result; wherein the first variance and the third result are both negatively correlated with the elastic load parameter; the larger the elastic load parameter, the smaller the impact of the output circuit being scheduled at that moment, and the stronger the load impact resistance of the output circuit when being scheduled at that moment;

[0096] The average value of all inelastic load levels of the output circuit within a preset neighborhood at the moment is obtained as a first reference value; the larger the first reference value is, the stronger the load impact resistance of the output circuit when it is scheduled at the moment; considering that the larger the scheduled power load is, the greater the impact on the inelastic load level is, the ratio of the scheduled power load data of the output circuit at the moment to the maximum power load data of the output circuit is used as the inelastic load adjustment weight of the output circuit at the moment; the larger the inelastic load adjustment weight is, the larger the power load data of the output circuit scheduled at the moment is, which indirectly indicates that the load impact resistance of the output circuit when it is scheduled at the moment is stronger; the product of the inelastic load adjustment weight and the first reference value is normalized as the inelastic load parameter of the output circuit at the moment; the larger the inelastic load parameter is, the stronger the load impact resistance of the output circuit when it is scheduled at the moment;

[0097] The average of the elastic load parameter and the inelastic load parameter of the output circuit at that moment is then used as the comprehensive load parameter of the output circuit at that moment. The larger the comprehensive load parameter, the stronger the load impact resistance of the output circuit when it is scheduled at that moment.

[0098] The calculation formula for the comprehensive load parameter is:

[0099] Where, is the comprehensive load parameter of the i-th output circuit at the t-th moment; is the preset neighborhood at the t-th moment; is the first variance; is the number of moments in the preset neighborhood of the t-th moment; is the degree of inelastic load of the i-th output circuit at the m-th moment within the preset neighborhood at the t-th moment; is the degree of inelastic load of the i-th output circuit at the m+1-th moment within the preset neighborhood at the t-th moment; is the second preset constant, which is greater than 0; For the third result; is the elastic load parameter of the i-th output circuit at the t-th moment; is the absolute value function; is the elastic load level of the i-th output circuit at the m-th moment within the preset neighborhood at the t-th moment; is the first reference value; Adjust the weight for the inelastic load of the i-th output circuit at time t; is the inelastic load parameter of the i-th output circuit at the t-th moment; norm is the normalization function.

[0100] This embodiment will Set to 1 to avoid the denominator being 0. Implementers can set it according to actual conditions. The size is not limited here.

[0101] At this point, the comprehensive load parameters of each output circuit at each moment are obtained.

[0102] Step S302: fitting the comprehensive load parameters of each output circuit at each moment according to the time sequence to obtain the time sequence comprehensive load function of each output circuit.

[0103] As an example, taking the i-th output circuit as an example, the time series integrated load function of the i-th output circuit is fitted using the integrated load parameters of the i-th output circuit at each moment. The specific process is as follows:

[0104] (1) Obtain the comprehensive load parameters of the i-th output circuit at each moment in the current time period, and sort them in chronological order from front to back to obtain the comprehensive load parameter sequence of the i-th output circuit;

[0105] (2) Taking the sampling time as the independent variable and the comprehensive load parameter as the dependent variable, the least squares function fitting is used to fit the comprehensive load parameter sequence of the i-th output circuit to obtain the fitting function, which is the time series comprehensive load function of the i-th output circuit Among them, the least squares function fitting is a well-known technology and will not be described in detail.

[0106] At this point, the timing integrated load function of each output circuit is obtained.

[0107] The power dispatch function acquisition module 30 is used to construct a comprehensive power dispatch function based on the dispatched status of each output circuit at the current dispatching time and the time series comprehensive load function of each output circuit.

[0108] Specifically, in a distribution box, when the power load output of one or more output circuits is insufficient, the power demand of the output circuits with insufficient power load output can be met by scheduling the power loads of other output circuits. At the same time, during the power load scheduling process, it is necessary to ensure that the power load output of all output circuits is stable as much as possible. In order to reasonably schedule the power load data in the output circuits, this embodiment constructs a comprehensive power scheduling function based on the scheduling status of each output circuit at the current time when scheduling is required and the time-series comprehensive load function of each output circuit. Among them, the smaller the comprehensive power scheduling function, the more reasonable the corresponding scheduling situation at the current time when scheduling is required.

[0109] Preferably, in a method that can be implemented in this embodiment, the method for obtaining the comprehensive power dispatching function is: for any output circuit, when the output circuit is dispatched at the current time when dispatching is required, the dispatching reference value of the output circuit is set to 1; when the output circuit is not dispatched at the current time when dispatching is required, the dispatching reference value of the output circuit is set to 0; and then the product of the dispatching reference value of the output circuit and the timing comprehensive load function is used as the participation function of the output circuit; when the fewer output circuits are dispatched at the current time when dispatching is required and the smaller the value of the timing comprehensive load function of the dispatched output circuit at the current time when dispatching is required, it means that the impact of power dispatching at the current time when dispatching is required is smaller, the power system is more stable, and indirectly means that the power dispatching distribution at the current time when dispatching is required is more reasonable. Considering that the number of scheduled output circuits and their sequential integrated load functions both affect power dispatch allocation, this embodiment uses the product of the first preset weight and the cumulative result of the dispatch reference values ​​of all output circuits as the dispatch target value; the product of the second preset weight and the cumulative result of the participation functions of all output circuits as the objective function; and the function formed by adding the dispatch target value and the objective function as the integrated power dispatch function. In this embodiment, both the first and second preset weights are set to 1. Implementers can adjust the values ​​of the first and second preset weights based on actual conditions, and this is not limited here.

[0110] Among them, the formula of the comprehensive power dispatch function is: Where, is the comprehensive power dispatch function; is the first preset weight; is the second preset weight; K is the total number of output circuits in the distribution box; is the scheduling reference value of the kth output circuit; is the timing integrated load function of the kth output circuit; is the participation function of the k-th output circuit; is the scheduling target value; is the objective function.

[0111] The data processing module 40 is used to obtain the dispatched output circuit and the dispatched power load data of each dispatched output circuit at the current dispatching time based on the comprehensive power dispatching function and its constraints.

[0112] Specifically, the fewer output circuits scheduled and the smaller the sum of the time-series integrated load functions of the scheduled output circuits, the more reasonable the power load scheduling at the time required for scheduling. To ensure reasonable power load scheduling, this embodiment further constructs constraints for the integrated power scheduling function. The constraints are: the scheduled power load data for each scheduled output circuit cannot exceed the maximum power load data for the corresponding output circuit; the sum of the scheduled power load data for all scheduled output circuits cannot exceed the maximum power load data for the distribution box output; and the sum of the scheduled power load data for all scheduled output circuits equals the demand power load data.

[0113] The specific process of accurately and efficiently dispatching the power load at the current dispatching time based on the comprehensive power dispatch function and its constraints is as follows:

[0114] (1) First, clarify the total load demand of one or more output circuits that need to be dispatched in the distribution box at the current dispatching time;

[0115] (2) Then, when the comprehensive power dispatch function is minimized and the constraints are met, the existing algorithm is used to solve the problem, accurately and efficiently obtaining the output circuits that need to be dispatched at the current dispatch time, as well as the dispatch power load data of each output circuit that needs to be dispatched; ensuring that the power load distribution in the output circuits in the distribution box is reasonable;

[0116] (3) According to the output circuits that need to be dispatched at the current dispatching time and the dispatching power load data of each output circuit that needs to be dispatched, the power resource dispatching of different output circuits in the distribution box is completed, the efficiency and utilization of power dispatching are improved, the waste of power resources and the risk of excessive power load in the output circuit are avoided, and the stable operation of the power system is ensured.

[0117] This concludes the present invention.

[0118] In summary, this embodiment obtains the power load data of each output circuit in the distribution box through the data acquisition module, obtains the inelastic load degree and the elastic load degree according to the distribution of the power load data in the time series comprehensive load function acquisition module, and then obtains the time series comprehensive load function of the output circuit; in the power dispatching function acquisition module, based on the time series comprehensive load function, a comprehensive power dispatching function is constructed, and finally the comprehensive power dispatching function is solved in the data processing module to obtain the output circuit to be dispatched at the current time when dispatching is required and its dispatching power load data. By constructing a comprehensive power dispatching function and solving it, the present invention accurately and efficiently determines the dispatching of the power load in the distribution box, improves the efficiency and utilization of power dispatching, and ensures the stable operation of the power system.

[0119] It should be noted that the order in which the embodiments of the present invention are described above is for illustrative purposes only and does not necessarily represent the superiority or inferiority of the embodiments. The processes depicted in the accompanying drawings do not necessarily require the specific order or sequential order shown to achieve the desired results. In certain embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0120] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

Claims

1. A power monitoring system for a distribution box, characterized in that: The system includes the following steps: The data acquisition module is used to obtain the power load data of each output circuit in the distribution box at each moment in the current time period; A time-series integrated load function acquisition module is used to obtain the inelastic load degree and elastic load degree of each output circuit at each moment based on the distribution of the power load data of each output circuit; and to obtain the time-series integrated load function of each output circuit based on the change in the elastic load degree and the magnitude of the inelastic load degree within a preset neighborhood of each output circuit at each moment, as well as the proportion of the scheduled power load data of each output circuit at each moment; The power dispatch function acquisition module is used to construct a comprehensive power dispatch function based on the dispatch status of each output circuit at the current dispatch time and the time series comprehensive load function of each output circuit; A data processing module is used to obtain the dispatched output circuit and the dispatched power load data of each dispatched output circuit at the current dispatching time based on the comprehensive power dispatching function and its constraints; The method for obtaining the inelastic load degree is as follows: fitting the power load data of each output circuit in the current time period into a curve according to the time sequence, and using the curve as the power load signal of each output circuit; Decompose the power load signal of each output circuit using the EMD algorithm to obtain the IMF components and residual terms corresponding to each output circuit; Obtain the degree of inelastic load of each output circuit at each moment based on the difference between the data change at each moment in each IMF component corresponding to each output circuit and the overall data change, the data at each moment in each IMF component and the residual term, and the power load data at each moment in the power load signal of each output circuit; The method for obtaining the elastic load degree is: based on the data at each moment in each IMF component corresponding to each output circuit and its difference from the overall data, as well as the power load data at each moment in the power load signal of each output circuit, the elastic load degree of each output circuit at each moment is obtained.

2. A distribution box power monitoring system according to claim 1, characterized in that: The method for obtaining the inelastic load degree is: For any IMF component corresponding to any output circuit, obtain the ratio of the data at each moment in the IMF component to the data at the previous adjacent moment as the power growth degree value at the corresponding moment; For any moment in the current time period, obtain the difference between the power growth degree value at that moment in the IMF component and the average of the power growth degree values ​​at all moments in the IMF component as the first difference; When the first difference is greater than or equal to a preset first difference threshold, the inelastic determination value of the IMF component at this moment is set to 0; When the first difference is less than the preset first difference threshold, the inelastic decision value of the IMF component at this moment is set to 1; The product of the data of the IMF component at the moment and the inelastic determination value is used as the inelastic power reference value of the IMF component at the moment; The sum of the inelastic power reference values ​​of all IMF components corresponding to the output circuit at the moment is used as the first result of the output circuit at the moment; The sum of the first result and the data of the residual term corresponding to the output circuit at the moment is used as the inelastic overall power reference value of the output circuit at the moment; The ratio of the inelastic overall power reference value to the power load data of the power load signal of the output circuit at that moment is used as the inelastic load degree of the output circuit at that moment.

3. A distribution box power monitoring system according to claim 1, characterized in that: The method for obtaining the elastic load degree is: For any IMF component corresponding to any output circuit, obtain the ratio of the mean value of all data in the IMF component to the data at each moment as the power stability reference value at the corresponding moment; The result of negatively correlating and normalizing the power stability reference value at each moment in the IMF component is used as the second result at the corresponding moment; Add the second result to the first preset constant and round down the result to an integer, and use the result as the elasticity determination value of the IMF component at the corresponding moment; For any moment in the current time period, obtain the product of the elastic determination value of the IMF component at that moment and the data as the elastic power reference value of the IMF component at that moment; The ratio of the sum of the elastic power reference values ​​of all IMF components corresponding to the output circuit at that moment to the power load data at that moment in the power load signal of the output circuit is used as the elastic load degree of the output circuit at that moment.

4. A distribution box power monitoring system according to claim 1, characterized in that: The method for obtaining the time series integrated load function is: Obtain the comprehensive load parameters of each output circuit at each moment based on the change in the elastic load level and the size of the inelastic load level within the preset neighborhood of each output circuit at each moment, as well as the proportion of the dispatched power load data of each output circuit at each moment; The comprehensive load parameters of each output circuit at each moment are fitted according to the time sequence to obtain the time series comprehensive load function of each output circuit.

5. A power monitoring system for a distribution box according to claim 4, characterized in that: The method for obtaining the comprehensive load parameters is: For any output circuit and any moment in the current time period, obtaining the variance of the elastic load degree of the output circuit within a preset neighborhood at the moment as a first variance; Obtaining, as a third result, a cumulative result of differences in elastic load levels of the output circuit between any two adjacent moments within a preset neighborhood at the moment; Obtaining an elastic load parameter of the output circuit at the moment according to the first variance and the third result; wherein the first variance and the third result are both negatively correlated with the elastic load parameter; Obtaining an average value of all inelastic load levels of the output circuit within a preset neighborhood at the moment as a first reference value; The ratio of the scheduled power load data of the output circuit at the moment to the maximum power load data of the output circuit is used as the inelastic load adjustment weight of the output circuit at the moment; Normalizing the product of the inelastic load adjustment weight and the first reference value, and using the result as the inelastic load parameter of the output circuit at the moment; The average value of the elastic load parameter and the inelastic load parameter of the output circuit at the moment is used as the comprehensive load parameter of the output circuit at the moment.

6. A distribution box power monitoring system according to claim 1, characterized in that: The method for obtaining the comprehensive power dispatch function is: For any output circuit, when the output circuit is scheduled at the current scheduling time, the scheduling reference value of the output circuit is set to 1; When the output circuit is not scheduled at the current scheduling time, the scheduling reference value of the output circuit is set to 0; The product of the scheduling reference value of the output circuit and the timing integrated load function is used as the participation function of the output circuit; multiplying the first preset weight by the accumulated result of the scheduling reference values ​​of all output circuits as the scheduling target value; The product of the second preset weight and the accumulated result of the participation functions of all output circuits is used as the objective function; The function formed by adding the dispatch target value and the objective function is used as the comprehensive power dispatch function.

7. A distribution box power monitoring system according to claim 1, characterized in that: The constraints are: The scheduled power load data of each output circuit to be scheduled cannot exceed the maximum power load data of the corresponding output circuit; The sum of the dispatched power load data of all dispatched output circuits cannot exceed the maximum power load data output by the distribution box; The sum of the dispatched power load data of all dispatched output circuits is equal to the demanded power load data.

8. The power monitoring system for a distribution box according to claim 1, characterized in that: The method for obtaining the scheduled output circuit and the scheduled power load data of each scheduled output circuit at the current scheduling time is: When the comprehensive power dispatching function is minimized and meets the constraints, the dispatching power load data of the dispatched output circuit and each dispatched output circuit will be obtained as the dispatching power load data of the dispatched output circuit and each dispatched output circuit at the current dispatching moment.

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