Control method of compensation controller in low-voltage power distribution system
By cleaning and screening the monitoring data of the reactive compensation controller, calculating the power factor and exciting the capacitor and investing, the problem of low calculation accuracy caused by unpreprocessing of the reactive compensation controller data is solved, and data effectiveness and Calculation accuracy.
Patent Information
- Application Number
- CN202411450255.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-02-18
AI Technical Summary
The data monitored after the initialization of the reactive compensation controller is not preprocessed, resulting in the redundant data present in the data affecting the accuracy of subsequent calculations.
After the reactive compensation controller is initialized, a set of capacitors is put into operation and the voltage and current signals of the distribution system are monitored. Then, the monitoring data is cleaned, organized, converted, transformed and screened to obtain the final data and calculate the power factor based on the final data. , and the capacitor is cut off and put into operation.
Data preprocessing improves the effectiveness of data, thereby improving the accuracy of subsequent calculations, avoiding the impact of redundant data on calculations.
Smart Images
Figure CN119482512A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of data processing, and in particular to a control method of a compensation controller in a low-voltage power distribution system. Background Art
[0002] As nonlinear fluctuating loads are increasingly used in low-voltage distribution networks, power harmonics caused by nonlinear loads are becoming more and more serious. The widespread use of parallel reactive capacitor banks will cause a new problem, namely power resonance. At the resonant frequency, the resonant impedance is very large, and even a small harmonic current will cause a large resonant voltage. This resonant voltage is first applied to the parallel reactive capacitor, which may cause the capacitor device to burn out. Traditional reactive compensation controllers do not consider the impact of harmonic resonance in their control strategies. In order to reduce the impact of resonance on capacitor devices, additional measures such as adding reactors or harmonic filters are generally adopted. Although these additional measures can reduce the impact of resonance on reactive capacitors, these measures have various disadvantages. For fluctuating nonlinear loads, changing the size and installation position of the capacitor is not very effective. Series reactors cannot really avoid resonance, but only adjust the resonant frequency point, and series reactors will also offset the effect of reactive compensation. Adding filters can filter out harmonic currents of a certain frequency and effectively reduce the impact of harmonics on capacitors; however, passive harmonic filters can generally only filter out harmonics of a single frequency, and filters with multiple frequencies are more expensive. In short, these additional measures not only limit their application scenarios, but also increase the hardware, labor and maintenance costs of the system.
[0003] At present, the prior art discloses a control method for a reactive power compensation controller in a low-voltage power distribution system. Based on the analysis of harmonic resonance, a new reactive power compensation controller control strategy is proposed. In addition to conventional control quantities (power factor and reactive power, etc.), an additional control quantity, the resonant frequency, is added. In terms of technical implementation, the harmonic impedance on the system side is measured by cleverly using capacitor switching, and the resonant frequency corresponding to different capacitor capacities is further calculated to control the number of reactive capacitor groups put into use. This method fundamentally avoids the resonance caused by the parallel capacitors. Even if no additional measures are taken, the capacitors can be effectively prevented from burning due to overvoltage or overcurrent caused by resonance. The algorithm is simple, and there is no need to change the hardware circuit and wiring method of the traditional controller. It can be easily transplanted into the existing reactive power compensation controller; the harmonic impedance of each system will be updated every time the capacitor group is switched, and it will not be affected by changes in the operating mode.
[0004] In the above manner, the data monitored by the reactive power compensation controller after initialization is not preprocessed, and the redundant data in the data will affect subsequent calculations, thereby reducing the accuracy of control. Summary of the invention
[0005] The object of the present invention is to provide a control method for a compensation controller in a low-voltage power distribution system, aiming to solve the problem that the data monitored by the reactive compensation controller after initialization is not preprocessed, and the redundant data in the data will affect subsequent calculations.
[0006] To achieve the above object, the present invention provides a control method for a compensation controller in a low-voltage power distribution system, comprising the following steps:
[0007] After the reactive power compensation controller is initialized, a group of capacitors are put into operation, and the voltage and current signals at the output end of the power distribution system and the transformer side of the capacitor access point are monitored to obtain monitoring data;
[0008] Clean, organize, convert, transform and filter the monitoring data in turn to obtain the final data;
[0009] calculating a power factor based on the final data;
[0010] The capacitor is removed and put into operation based on the power factor to obtain a control result.
[0011] The monitoring data is cleaned, sorted, converted, transformed and screened in sequence to obtain the final data, including:
[0012] Deleting invalid, erroneous or incomplete data in the monitoring data to obtain cleaned data;
[0013] The cleaned data is standardized, deduplicated, and filled with missing values to obtain complete data;
[0014] Converting the complete data into a unified scale or unit according to a preset standard to obtain converted data;
[0015] Aggregating, splitting and mapping the conversion data to obtain transformed data;
[0016] The transformed data is screened according to preset rules to obtain final data.
[0017] Wherein, after the step of removing and putting in capacitors based on the power factor to obtain a control result, the method further includes:
[0018] Build a visual model of the power distribution system;
[0019] Modify the working state of the corresponding capacitor in the visualization model based on the control result to obtain the current power distribution system model;
[0020] The current power distribution system model is displayed through a display screen.
[0021] Wherein, after the step of displaying the current power distribution system model on a display screen, the method further comprises:
[0022] The naming search term for the current power distribution system model is stored in a database;
[0023] Extract features from the search instructions to obtain keywords;
[0024] The keyword is matched with each search term in the database, and the model corresponding to the successfully matched search term can be extracted to obtain the target model.
[0025] Wherein, after the step of matching the keyword with each search term in the database, extracting the model corresponding to the successfully matched search term to obtain the target model, the method further comprises:
[0026] Acquire the storage space of the database at preset time intervals;
[0027] When the storage space is lower than a preset value, the models in the database are compressed according to a preset number and the storage order of the models in the database to obtain a compressed package, and a model cleaning reminder is issued to the staff at the same time;
[0028] The staff cleans up the models in the compressed package to obtain the remaining models;
[0029] The remaining models are decompressed and stored in the database, and the compressed package is deleted.
[0030] The feature extraction of the search instruction to obtain keywords includes:
[0031] Build a keyword extraction model;
[0032] The search instruction is input into the keyword extraction model for training to obtain keywords.
[0033] Wherein, constructing a keyword extraction model includes:
[0034] The deep neural network model is trained using the existing training data set to obtain a keyword extraction model.
[0035] The present invention discloses a control method for a compensation controller in a low-voltage power distribution system. After the reactive compensation controller is initialized, a group of capacitors are put into use, and the voltage and current signals at the output end of the power distribution system and the transformer side of the capacitor access point are monitored to obtain monitoring data; the monitoring data are sequentially cleaned, sorted, converted, transformed and screened to obtain final data; the power factor is calculated based on the final data; the capacitor is removed and put into use based on the power factor to obtain a control result. The present invention implements preprocessing of data before calculation through the above steps, improves the validity of the data, and further improves the accuracy of subsequent calculations, and solves the problem that the data monitored after the reactive compensation controller is initialized is not preprocessed, and the redundant data in the data will affect the subsequent calculations. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.
[0037] Figure 1 It is a flow chart of a control method of a compensation controller in a low-voltage power distribution system provided by the present invention.
[0038] Figure 2 It is a flow chart that cleans, organizes, converts, transforms and filters the monitoring data in sequence to obtain the final data. DETAILED DESCRIPTION
[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.
[0040] See also Figure 1 to Figure 2 The present invention provides a control method for a compensation controller in a low-voltage power distribution system, comprising the following steps:
[0041] After the S101 reactive power compensation controller is initialized, a group of capacitors are put into use, and the voltage and current signals at the output end of the distribution system and the transformer side of the capacitor access point are monitored to obtain monitoring data;
[0042] S102 cleans, sorts, converts, transforms and filters the monitoring data in sequence to obtain final data;
[0043] The specific method is:
[0044] S21 deletes invalid, erroneous or incomplete data in the monitoring data to obtain cleaned data;
[0045] Specifically, cleaning can ensure the accuracy and completeness of data.
[0046] S22 standardizes, removes duplicates, and fills missing values in the cleaned data to obtain complete data;
[0047] Specifically, through sorting, the data can be converted and processed as necessary to meet the requirements of subsequent processing.
[0048] S23 converts the complete data into a unified scale or unit according to a preset standard to obtain converted data;
[0049] Specifically, conversion can facilitate subsequent processing and analysis.
[0050] S24 aggregates, splits and maps the conversion data to obtain transformed data;
[0051] Specifically, transformation can facilitate subsequent processing and analysis.
[0052] S25 screens the transformed data according to preset rules to obtain final data.
[0053] Specifically, unnecessary redundant data can be removed through screening to improve the validity of the data.
[0054] S103 calculates a power factor based on the final data;
[0055] Specifically, the power factor calculation method is the same as the calculation method in the prior art.
[0056] S104 removes and adds capacitors based on the power factor to obtain a control result.
[0057] Specifically, the excision and the input are the same as the methods in the prior art.
[0058] S105 builds a visual model of the power distribution system;
[0059] S106: modifying the working state of the corresponding capacitor in the visualization model based on the control result to obtain a current power distribution system model;
[0060] S107 displays the current power distribution system model through a display screen.
[0061] Specifically, the working status of all capacitors can be intuitively seen through the current power distribution system model, which is convenient for real-time observation of the power distribution system.
[0062] S108 is to name the current power distribution system model and store it in a database after searching for the term;
[0063] S109 performs feature extraction on the search instruction to obtain keywords;
[0064] Specifically, a keyword extraction model is constructed; the search instruction is input into the keyword extraction model for training to obtain keywords. The construction of the keyword extraction model includes: training a deep neural network model with an existing training data set to obtain a keyword extraction model.
[0065] S110 matches the keyword with each search term in the database, and extracts the model corresponding to the successfully matched search term to obtain a target model.
[0066] Specifically, the storage and calling of the model are realized through steps S108-S110, which is convenient for subsequent recording and checking.
[0067] S111 obtains the storage space of the database at preset time intervals;
[0068] S112: when the storage space is lower than a preset value, the models in the database are compressed according to a preset number and the storage order of the models in the database to obtain a compressed package, and a model cleaning reminder is issued to the staff;
[0069] S113 The staff cleans up the models in the compressed package to obtain the remaining models;
[0070] S114 decompresses the remaining models and stores them in the database, while deleting the compressed package.
[0071] Specifically, steps S111-S114 are used to monitor and clean up the storage space of the database, so that the database always has enough space to store the model to be generated, thereby avoiding model storage failure due to insufficient space and inability to use the model in subsequent work.
[0072] The present invention discloses a control method for a compensation controller in a low-voltage power distribution system. After the reactive compensation controller is initialized, a group of capacitors are put into use, and the voltage and current signals at the output end of the power distribution system and the transformer side of the capacitor access point are monitored to obtain monitoring data; the monitoring data are sequentially cleaned, sorted, converted, transformed and screened to obtain final data; the power factor is calculated based on the final data; the capacitor is removed and put into use based on the power factor to obtain a control result. The present invention implements preprocessing of data before calculation through the above steps, improves the validity of the data, and further improves the accuracy of subsequent calculations, and solves the problem that the data monitored after the reactive compensation controller is initialized is not preprocessed, and the redundant data in the data will affect the subsequent calculations.
[0073] Next, by constructing a visualization model of the power distribution system, modifying the working state of the corresponding capacitor in the visualization model based on the control result, the current power distribution system model is obtained, and the current power distribution system model is displayed on a display screen. The visualization of the model is achieved, and the real-time observation of the power distribution system is improved.
[0074] Then, the current power distribution system model is named and stored in the database after the search term is named; the search instruction is feature extracted to obtain the keyword; the keyword is matched with each search term in the database, and the model corresponding to the successfully matched search term can be extracted to obtain the target model. The storage and call of the model are realized, which is convenient for the subsequent use of the model.
[0075] In addition, the storage space of the database is obtained at preset intervals; when the storage space is lower than a preset value, the models in the database are compressed according to the preset quantity and the storage order of the models in the database to obtain a compressed package, and a model cleaning reminder is issued to the staff; the staff cleans the models in the compressed package to obtain the remaining models; the remaining models are decompressed and stored in the database, and the compressed package is deleted. The storage space of the database is monitored and cleaned up, so that the database always has enough space to store the model to be generated, avoiding the failure of model storage due to insufficient space, and the inability to use the model in subsequent work.
[0076] What is disclosed above is only a preferred embodiment of a control method of a compensation controller in a low-voltage power distribution system of the present invention. Of course, this cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.
Claims
1. A control method for a compensation controller in a low voltage power distribution system, characterized in that: The following steps are involved: After the reactive power compensation controller is initialized, a group of capacitors are put into operation, and the voltage and current signals at the output end of the power distribution system and the transformer side of the capacitor access point are monitored to obtain monitoring data; Clean, organize, convert, transform and filter the monitoring data in turn to obtain the final data; calculating a power factor based on the final data; The capacitor is removed and put into operation based on the power factor to obtain a control result.
2. The control method of the compensation controller in the low voltage power distribution system according to claim 1, characterized in that: The monitoring data is cleaned, sorted, converted, transformed and screened in sequence to obtain the final data, including: Deleting invalid, erroneous or incomplete data in the monitoring data to obtain cleaned data; The cleaned data is standardized, deduplicated, and filled with missing values to obtain complete data; Converting the complete data into a unified scale or unit according to a preset standard to obtain converted data; Aggregating, splitting and mapping the conversion data to obtain transformed data; The transformed data is screened according to preset rules to obtain final data.
3. The control method of the compensation controller in the low voltage power distribution system according to claim 2, characterized in that: After the step of removing and putting capacitors into operation based on the power factor to obtain a control result, the method further includes: Build a visual model of the power distribution system; Modify the working state of the corresponding capacitor in the visualization model based on the control result to obtain the current power distribution system model; The current power distribution system model is displayed through a display screen.
4. The control method of the compensation controller in the low voltage power distribution system according to claim 3, characterized in that: After the step of displaying the current power distribution system model on a display screen, the method further includes: The naming search term for the current power distribution system model is stored in a database; Extract features from the search instructions to obtain keywords; The keyword is matched with each search term in the database, and the model corresponding to the successfully matched search term can be extracted to obtain the target model.
5. The control method of the compensation controller in the low voltage power distribution system according to claim 4, characterized in that: After the keyword is matched with each search term in the database, the model corresponding to the successfully matched search term can be extracted to obtain the target model, the method further includes: Acquire the storage space of the database at preset time intervals; When the storage space is lower than a preset value, the models in the database are compressed according to a preset number and the storage order of the models in the database to obtain a compressed package, and a model cleaning reminder is issued to the staff at the same time; The staff cleans up the models in the compressed package to obtain the remaining models; The remaining models are decompressed and stored in the database, and the compressed package is deleted.
6. The control method of the compensation controller in the low voltage power distribution system according to claim 4, characterized in that: The feature extraction of the search instruction to obtain keywords includes: Build a keyword extraction model; The search instruction is input into the keyword extraction model for training to obtain keywords.
7. The control method of the compensation controller in the low voltage power distribution system according to claim 6, characterized in that: The step of constructing a keyword extraction model includes: The deep neural network model is trained using the existing training data set to obtain a keyword extraction model.