CN115437303A - Wisdom safety power consumption monitoring and control system - Google Patents
Wisdom safety power consumption monitoring and control system Download PDFInfo
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- G—PHYSICS
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- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0428—Safety, monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
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Abstract
The invention discloses an intelligent safety power utilization monitoring and control system, which comprises: the acquisition module acquires voltage signals, current signals, active power, load temperature, load humidity, smoke concentration, leakage current, power factors and ground resistance values of a plurality of nonlinear loads in real time; the processing module carries out waveform interception on current signals of each nonlinear load to obtain fundamental waves, an environment disturbance value is obtained through processing according to load temperature, load humidity and smoke concentration, and an internal disturbance value is obtained through calculation according to leakage current, a power factor and a ground resistance value; the adjusting module introduces a wavelet transform function, adjusts a wavelet basis function in the wavelet transform function according to the environmental disturbance value and the internal disturbance value, converts the wavelet transform function into a wavelet optimization function, and calls the wavelet optimization function to perform wavelet transform on each fundamental wave to obtain a correction wave; the control module adjusts output to each nonlinear load according to the correction wave. The invention improves the harmonic detection precision of the nonlinear load.
Description
Technical Field
The invention relates to the technical field of intelligent detection, in particular to an intelligent safety power utilization monitoring and control system.
Background
The power load ends in the power system are generally nonlinear loads, the nonlinear loads can generate harmonic waves in the normal operation process of the power system, and the generation of the harmonic waves can not only influence the precision of the parameter measurement of the power system, but also cause the unstable operation of the power system, and can also cause the aging and heating of equipment and influence the service life of the power equipment. In the prior art, for harmonic detection in an electric power system, a fourier transform algorithm and a wavelet transform algorithm are generally adopted, but a harmonic detection method based on fourier transform can only obtain the whole time domain of a signal but cannot obtain the local characteristics of the signal, while the wavelet transform algorithm can fully highlight the characteristics of certain aspects of problems through transformation, can perform local analysis on time and frequency, gradually perform multi-scale refinement on the signal through telescopic translation calculation, finally achieve high-frequency time refinement and low-frequency refinement, and can automatically adapt to the requirements of time-frequency signal analysis. However, the selection process of the optimized basis functions in the wavelet transform algorithm in the prior art is very difficult, and the optimized basis functions optimally selected in different environments are different, so that the wavelet transform algorithm in the prior art is greatly influenced by the environment under the condition of changing the environment, and further the harmonic detection precision of the nonlinear load is not high enough.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an intelligent safety power utilization monitoring and control system which is used for improving the harmonic detection precision of a nonlinear load.
In order to achieve the purpose, the invention provides the following technical scheme: an intelligent safety electricity monitoring and control system, comprising:
the acquisition module is used for acquiring voltage signals, current signals, active power, load temperature, load humidity, smoke concentration, leakage current, power factors and ground resistance values of a plurality of nonlinear loads in real time;
the processing module is connected with the acquisition module and used for performing waveform interception on the current signal of each nonlinear load to obtain a corresponding fundamental wave, processing according to the load temperature, the load humidity and the smoke concentration to obtain an environmental disturbance value, and calculating according to the leakage current, the power factor and the ground resistance value to obtain an internal disturbance value;
the adjusting module is connected with the processing module and used for introducing a wavelet transform function, dynamically adjusting a wavelet basis function in the wavelet transform function according to the environmental disturbance value and the internal disturbance value, converting the wavelet transform function into a wavelet optimization function, and calling the wavelet optimization function to perform wavelet transform on each fundamental wave to filter high-frequency harmonic waves and unsteady-state harmonic waves to obtain correction waves;
and the control module is connected with the adjusting module and used for adjusting the output of each nonlinear load according to the correction wave.
Further, the adjustment module includes:
the storage unit is used for storing a plurality of historical environment disturbance values, a plurality of historical internal disturbance values and a plurality of corresponding historical basis function offsets;
the model training unit is connected with the storage unit and used for taking the historical environment disturbance value and the historical internal disturbance value at the same moment as input and taking the corresponding historical basis function offset as output to train to obtain a disturbance offset model;
the function adjusting unit is connected with the model training unit and used for inputting the environment disturbance value and the internal disturbance value into the disturbance offset model to obtain a basic function offset, adding the wavelet basic function and the basic function offset to obtain an optimized basic function, and then adjusting and updating the wavelet transformation function according to the optimized basic function to obtain the wavelet optimized function;
and the waveform adjusting unit is connected with the function adjusting unit and used for performing wavelet transformation on each fundamental wave according to the wavelet optimization function and filtering high-frequency harmonic waves and unsteady-state harmonic waves in the fundamental waves so as to convert the fundamental waves into the correction waves.
Further, the wavelet transform function is configured to:
wherein,
for representing the wavelet transform function;
wherein
For representing the optimized basis functions;
Further, the function adjusting unit constrains the basis function offset, the scale parameter, and the time parameter according to preset constraint conditions in the process of adding the wavelet basis function and the basis function offset, where the constraint conditions are configured to:
wherein,
are all preset constants not less than 0.
Further, the processing module comprises:
the signal interception unit is used for intercepting the waveform of the current signal of each nonlinear load according to a preset rectangular window to obtain the corresponding fundamental wave;
the first processing unit is used for inputting the load temperature, the load humidity and the smoke concentration of each nonlinear load into a preset first calculation formula to obtain the environmental disturbance value;
and the second processing unit is used for inputting the leakage current, the power factor and the ground resistance value of each nonlinear load into a preset second calculation formula to obtain the internal disturbance value.
Further, the first calculation formula is configured to:
wherein,
for representing the load temperature;
Further, the second calculation formula is configured to:
wherein,
for representing the power factor;
Further, the control module includes:
the comparison unit is used for comparing each correction wave with a preset safe waveform range respectively and generating a corresponding comparison result;
and the alarm protection unit is connected with the comparison unit and used for carrying out alarm reminding on the nonlinear load corresponding to the correction wave and stopping outputting the nonlinear load when the comparison result shows that the correction wave is not in the safe waveform range.
The power consumption cloud platform is further connected with a mobile control terminal and a fixed control terminal, and the mobile control terminal and the fixed control terminal are used for carrying out data query on the voltage signal, the current signal, the active power, the load temperature, the load humidity, the smoke concentration, the leakage current, the power factor, the earth resistance value and the correction wave of each nonlinear load.
The invention has the beneficial effects that:
according to the invention, each power parameter in the operation process of the nonlinear load is detected, the environment disturbance quantity and the internal disturbance quantity are obtained through calculation, then the wavelet basis function in the wavelet transform algorithm is optimized according to the environment disturbance quantity and the internal disturbance quantity to obtain the optimized basis function, and then the wavelet basis function in the wavelet transform algorithm is replaced by the optimized basis function to obtain the wavelet optimized function.
Drawings
Fig. 1 is a schematic structural diagram of an intelligent safety power consumption monitoring and controlling system according to the present invention.
Reference numerals are as follows: 1. an acquisition module; 2. a processing module; 21. a signal intercepting unit; 22. a first processing unit; 23. a second processing unit; 3. an adjustment module; 31. a storage unit; 32. a model training unit; 33. a function adjusting unit; 34. a waveform adjusting unit; 4. a control module; 41. a comparison unit; 42. an alarm protection unit; 5. a data control center; 6. a power utilization cloud platform; 7. and a third-party big data management platform.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front", "back", "left", "right", "upper" and "lower" refer to directions in the drawings, and the terms "bottom" and "top", "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1, the intelligent safety power consumption monitoring and controlling system of the present embodiment includes:
the acquisition module 1 is used for acquiring voltage signals, current signals, active power, load temperature, load humidity, smoke concentration, leakage current, power factors and ground resistance values of a plurality of nonlinear loads in real time;
the processing module 2 is connected with the acquisition module 1 and is used for carrying out waveform interception on current signals of each nonlinear load to obtain corresponding fundamental waves, processing according to load temperature, load humidity and smoke concentration to obtain an environmental disturbance value, and calculating according to leakage current, a power factor and a ground resistance value to obtain an internal disturbance value;
the adjusting module 3 is connected with the processing module 2 and used for introducing a wavelet transform function, dynamically adjusting a wavelet basis function in the wavelet transform function according to the environmental disturbance value and the internal disturbance value, converting the wavelet transform function into a wavelet optimization function, and calling the wavelet optimization function to perform wavelet transform on each fundamental wave to filter high-frequency harmonic waves and unsteady-state harmonic waves to obtain correction waves;
and the control module 4 is connected with the adjusting module 3 and used for adjusting the output of each nonlinear load according to the correction wave.
Specifically, in the present embodiment, the nonlinear load includes a three-phase load and a single-phase load. The acquisition module 1 may be a signal acquisition device corresponding to a voltage signal, a current signal, active power, a load temperature, a load humidity, a smoke concentration, a leakage current, a power factor, and a ground resistance value, and includes a voltmeter, an ammeter, a power tester, a temperature sensor, a humidity sensor, a smoke sensor, a power factor tester, a resistance detector, and the like. The processing module 2 may be a signal processing software installed on a computer, which intercepts the fundamental wave in the current signal through a rectangular window, whose window width is identical to the length of the current signal, which is 10us in this embodiment. And simultaneously, the signal processing software calculates an environmental disturbance value for representing the external environmental disturbance degree according to the load temperature, the load humidity and the smoke concentration respectively, calculates an internal disturbance value for representing the internal factor disturbance degree according to the leakage current, the power factor and the ground resistance value, and both the external environment and the internal factor can influence the harmonic content in the current signal in the nonlinear load operation process. The adjustment module 3 may be waveform detection adjustment software installed on a computer. The waveform detection adjusting software is provided with a universal wavelet transform function, the waveform detection adjusting software dynamically adjusts a wavelet basis function according to an external interference value and an internal interference value output by the signal processing software, and then replaces the wavelet basis function in a wavelet transform algorithm by the optimized basis function to obtain a wavelet optimization function, the wavelet optimization function can be dynamically adjusted according to an environment disturbance amount and an internal disturbance amount, the influence of the environment on harmonic detection precision is avoided, and the harmonic detection precision of a nonlinear load is improved.
Preferably, the adjusting module 3 comprises:
the storage unit 31 is used for storing a plurality of historical environment disturbance values, a plurality of historical internal disturbance values and a plurality of corresponding historical basis function offsets;
the model training unit 32 is connected with the storage unit 31 and is used for taking the historical environment disturbance value and the historical internal disturbance value at the same moment as input and taking the corresponding historical basis function offset as output to train to obtain a disturbance offset model;
the function adjusting unit 33 is connected with the model training unit 32, and is configured to input the environmental disturbance value and the internal disturbance value into the disturbance offset model to obtain a basis function offset, add the wavelet basis function and the basis function offset to obtain an optimized basis function, and further adjust and update the wavelet transform function according to the optimized basis function to obtain a wavelet optimized function;
and the waveform adjusting unit 34 is connected with the function adjusting unit 33 and used for performing wavelet transformation on each fundamental wave according to the wavelet optimization function and filtering high-frequency harmonic waves and unsteady-state harmonic waves in the fundamental waves so as to convert the fundamental waves into correction waves.
Specifically, in this embodiment, the storage unit 31 may be an internal storage space allocated for the waveform detection adjustment software in the computer. The historical environmental disturbance value, the historical internal disturbance value and the historical basis function offset in the storage unit 31 are divided into a training set and a test set according to a preset proportion, and the preset proportion can be 7:1. The function adjusting unit 33 takes the historical environmental disturbance value and the historical internal disturbance value in the training set as the input of the model, and takes the historical basis function offset in the training set as the output of the model, and obtains the disturbance offset model through training. After the disturbance deviation model is trained, inputting the historical environmental disturbance value and the historical internal disturbance value in the test set into the model to obtain a basic function deviation, and then comparing the basic function deviation with the historical basic function deviation in the test set to obtain the test precision of the model, wherein the model is trained only when the test precision of the model reaches more than 90%, otherwise, the model is continuously trained until the test precision reaches more than 90%. The function adjusting unit 33 inputs the environmental disturbance value and the internal disturbance value obtained by real-time calculation into the trained disturbance offset model, so that the disturbance offset model outputs the basis function offset. And then overlapping the basic function offset and the wavelet basic function to obtain an optimized basic function, and replacing the wavelet basic function with the optimized basic function to update the wavelet transformation function to obtain the wavelet optimized function. The waveform adjusting unit 34 performs wavelet transformation on the fundamental wave intercepted by the signal processing software by calling the optimized wavelet optimization function, so as to filter the high-frequency harmonic wave and the unsteady harmonic wave to obtain a correction wave, wherein the waveform accuracy of the correction wave is higher than that of the waveform obtained by directly using a harmonic detection method of wavelet transformation and fourier transformation in the prior art.
Preferably, the wavelet transform function is configured to:
wherein,
for representing the wavelet transform function;
wherein
For representing the optimized basis functions;
Preferably, the function adjusting unit 33 constrains the basis function offset, the scale parameter and the time parameter according to a preset constraint condition in the process of adding the wavelet basis function and the basis function offset, where the constraint condition is configured to:
wherein,
Specifically, in this embodiment, constraint conditions are set, and the basis function offset, the scale parameter, and the time parameter are constrained within a preset range, so that it is avoided that the accuracy of the finally obtained correction wave is not high enough due to an error in the calculation process of the basis function offset, the scale parameter, and the time parameter constraint, and meanwhile, the computation workload in the computation process can be effectively reduced.
Preferably, the processing module 2 comprises:
the signal intercepting unit 21 is configured to perform waveform intercepting on current signals of each nonlinear load according to a preset rectangular window to obtain a corresponding fundamental wave;
the first processing unit 22 is configured to input the load temperature, the load humidity, and the smoke concentration of each nonlinear load into a preset first calculation formula to obtain an environmental disturbance value;
the second processing unit 23 is configured to input the leakage current, the power factor, and the ground resistance value of each nonlinear load into a preset second calculation formula to obtain an internal disturbance value.
Preferably, the first calculation formula is configured to:
wherein,
for representing the load temperature;
Preferably, the second calculation formula is configured to:
wherein,
for representing the power factor;
Preferably, the control module 4 comprises:
the comparison unit 41 is used for comparing each correction wave with a preset safe waveform range and generating a corresponding comparison result;
and the alarm protection unit 42 is connected with the comparison unit 41 and is used for carrying out alarm reminding on the nonlinear load corresponding to the correction wave and stopping outputting the nonlinear load when the comparison result shows that the correction wave is not in the safe waveform range.
Specifically, in this embodiment, the control module 4 may perform single-phase output or three-phase output or single-phase and three-phase integrated output according to the correction wave, and perform alarm and power-off protection when the correction wave of each output loop is abnormal, and the control module 4 may also monitor real-time power consumption data such as voltage signals, current signals, active power, load temperature, load humidity, smoke concentration, leakage current, power factor, and ground resistance of each nonlinear load, and allocate a corresponding threshold to each real-time power consumption data, and perform alarm and power-off protection when the threshold is exceeded.
Preferably, the system further comprises a data control center 5, which is respectively connected with the control module 4, the power utilization cloud platform 6 or the third-party big data management platform 7, the data control center 5 is used for sending the voltage signal, the current signal, the active power, the load temperature, the load humidity, the smoke concentration, the leakage current, the power factor, the earth resistance value and the correction wave of each nonlinear load to the power utilization cloud platform 6 or the third-party big data management platform 7 for storage, the power utilization cloud platform 6 is further connected with a mobile control terminal and a fixed control terminal, and the mobile control terminal and the fixed control terminal are used for carrying out data query on the voltage signal, the current signal, the active power, the load temperature, the load humidity, the smoke concentration, the leakage current, the power factor, the earth resistance value and the correction wave of each nonlinear load.
Specifically, in this embodiment, the control module 4 is equipped with two sets of communication modules, the downlink module performs data acquisition and command assignment with the processing module 2 through the HPLC carrier module, and the uplink module performs data transmission with the data control center 5 through the DTU. The data control center 5 can simultaneously carry out data collection and instruction interaction on a plurality of control modules 4; the data control center 5 can synchronize data to the power utilization cloud platform 6 through TCP/IP or 2G, 3G, 4G and 5G/SIM cards according to the needs of users, can also be accessed to a third-party big data management platform 7, and receives related instructions sent by the third-party big data management platform 7. The electricity utilization cloud platform 6 can access through a mobile phone, a computer and a management account, check each nonlinear load and real-time electricity utilization data on the acquisition module 1 according to the authority of the account, and remotely control each nonlinear load. The management account number comprises three levels, namely a platform manager, a local manager and an equipment manager, and the management account number of each level corresponds to a corresponding management authority. The power utilization cloud platform 6 can store the real-time power utilization data of the data control centers 5 and download the data through the background management account. Can also set up name, position, the administrator's phone of every nonlinear load and collection module 1 in this wisdom safety power consumption monitoring and control system, when real-time power consumption data reaches and predetermines safe threshold value, dial the administrator's phone automatically to report trouble equipment name, position and fault type, realize automatic alarm, promote the security.
The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to those skilled in the art without departing from the principles of the present invention should also be considered as within the scope of the present invention.
Claims (9)
1. The utility model provides an wisdom safety power consumption monitoring and control system which characterized in that:
the acquisition module (1) is used for acquiring voltage signals, current signals, active power, load temperature, load humidity, smoke concentration, leakage current, power factors and ground resistance values of a plurality of nonlinear loads in real time;
the processing module (2) is connected with the acquisition module (1) and is used for performing waveform interception on the current signals of the nonlinear loads to obtain corresponding fundamental waves, processing according to the load temperature, the load humidity and the smoke concentration to obtain an environmental disturbance value, and calculating according to the leakage current, the power factor and the ground resistance value to obtain an internal disturbance value;
the adjusting module (3) is connected with the processing module (2) and is used for introducing a wavelet transform function, dynamically adjusting a wavelet basis function in the wavelet transform function according to the environmental disturbance value and the internal disturbance value, converting the wavelet transform function into a wavelet optimization function, and calling the wavelet optimization function to perform wavelet transform on each fundamental wave to filter high-frequency harmonic waves and unsteady-state harmonic waves to obtain correction waves;
and the control module (4) is connected with the adjusting module (3) and is used for adjusting the output of each nonlinear load according to the correction wave.
2. The system of claim 1, wherein the intelligent safety power monitoring and control system comprises: the adjustment module (3) comprises:
the storage unit (31) is used for storing a plurality of historical environment disturbance values, a plurality of historical internal disturbance values and a plurality of corresponding historical basis function offsets;
the model training unit (32) is connected with the storage unit (31) and is used for taking the historical environment disturbance value and the historical internal disturbance value at the same moment as input and taking the corresponding historical basis function offset as output to train to obtain a disturbance offset model;
the function adjusting unit (33) is connected with the model training unit (32) and is used for inputting the environment disturbance value and the internal disturbance value into the disturbance offset model to obtain a basic function offset, adding the wavelet basic function and the basic function offset to obtain an optimized basic function, and then adjusting and updating the wavelet transformation function according to the optimized basic function to obtain the wavelet optimized function;
and the waveform adjusting unit (34) is connected with the function adjusting unit (33) and is used for performing wavelet transformation on each fundamental wave according to the wavelet optimization function and filtering high-frequency harmonic waves and unstable-state harmonic waves in the fundamental waves so as to convert the fundamental waves into the correction waves.
3. The system of claim 2, wherein the intelligent safety power monitoring and control system comprises: the wavelet transform function is configured to:
wherein,
for representing the wavelet transform function;
wherein
For representing the optimized basis functions;
4. The system according to claim 3, wherein: the function adjustment unit (33) constrains the basis function offset, the scale parameter and the time parameter according to a preset constraint condition in the process of adding the wavelet basis function and the basis function offset, wherein the constraint condition is configured to:
wherein,
5. The system of claim 1, wherein the intelligent safety power monitoring and control system comprises: the processing module (2) comprises:
the signal intercepting unit (21) is used for intercepting the waveform of the current signal of each nonlinear load according to a preset rectangular window to obtain the corresponding fundamental wave;
a first processing unit (22) for inputting the load temperature, the load humidity and the smoke concentration of each nonlinear load into a preset first calculation formula to obtain the environmental disturbance value;
and the second processing unit (23) is used for inputting the leakage current, the power factor and the ground resistance value of each nonlinear load into a preset second calculation formula to obtain the internal disturbance value.
6. The system according to claim 5, wherein: the first calculation formula is configured to:
wherein,
for representing the load temperature;
7. The system according to claim 5, wherein: the second calculation formula is configured to:
wherein,
for representing the power factor;
8. The system of claim 1, wherein the intelligent safety power monitoring and control system comprises: the control module (4) comprises:
the comparison unit (41) is used for comparing each correction wave with a preset safe waveform range and generating a corresponding comparison result;
and the alarm protection unit (42) is connected with the comparison unit (41) and is used for carrying out alarm reminding on the nonlinear load corresponding to the correction wave and stopping outputting the nonlinear load when the comparison result shows that the correction wave is not in the safe waveform range.
9. The system of claim 1, wherein the intelligent safety power monitoring and control system comprises: the power consumption cloud platform (6) or the third-party big data management platform (7) are connected with the control module (4), the power consumption cloud platform (6) or the third-party big data management platform (7) respectively, the data control center (5) is used for sending the voltage signal, the current signal, the active power, the load temperature, the load humidity, the smoke concentration, the leakage current, the power factor, the earth resistance value and the correction wave of each nonlinear load to the power consumption cloud platform (6) or the third-party big data management platform (7) for storage, the power consumption cloud platform (6) is further connected with a mobile control terminal and a fixed control terminal, and the mobile control terminal and the fixed control terminal are used for carrying out data query on the voltage signal, the current signal, the active power, the load temperature, the load humidity, the smoke concentration, the leakage current, the power factor, the earth resistance value and the correction wave of each nonlinear load.
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