A low-voltage intelligent monitoring system

Abstract

The present invention relates to the technical field of power monitoring, and specifically relates to a low-voltage intelligent monitoring system, including: a collection module for collecting the daily operation parameters of a distribution transformer in a low-voltage substation area; a metering module for metering the real-time cumulative power distribution of the distribution transformer in the voltage substation area; a sensing module for real-time sensing of the operation vibration spectrum of the distribution transformer in the voltage substation area; and an analysis module for receiving the daily operation parameters of the distribution transformer in the low-voltage substation area collected by the collection module. The present invention takes the distribution transformer in the low-voltage substation area as the main monitoring object, comprehensively collects the operation parameters of the transformer, and at the same time, based on the two-way monitoring of the cumulative metering of the transmitted power and the operation vibration spectrum of the transformer, provides different trigger conditions for the analysis of the safety of the operation state of the transformer in the system, so as to realize the real-time monitoring and analysis of the distribution transformer in the low-voltage substation area, and determine whether the operation state of the transformer is safe by applying the comprehensive operation parameters of the transformer.

Description

Technical Field

[0001] The present invention relates to the technical field of power monitoring, and particularly relates to a low-voltage intelligent monitoring system. Background Art

[0002] A transformer is a key device in a low-voltage power distribution area. It is mainly used to convert medium-voltage electrical energy into low-voltage electrical energy, like a power "bridge". In a low-voltage power distribution area, the transformer receives medium-voltage input from the superior power grid, such as 10 kV voltage, and then steps it down to 380V / 220V to provide stable low-voltage power for residents and small commercial users, etc., and is an important hub for ensuring power supply.

[0003] In the invention patent with the application number 202210181538.1, a low-voltage power distribution area intelligent monitoring system is disclosed. The system includes a power distribution area topology monitoring and identification subsystem, and the power distribution area topology monitoring and identification subsystem includes: a resonance circuit (1) arranged in each intelligent micro-switch device on each branch line of the power distribution area to generate a specified resonance current; a current fingerprint signal generation module (2) for generating a current fingerprint signal corresponding to the current intelligent micro-switch device according to the resonance current generated by the resonance circuit (1) in the current intelligent micro-switch device and the address code of the current intelligent micro-switch device, and transmitting it on each branch line according to the line topology structure; a power distribution area topology identification module (3) for receiving the current fingerprint signal for decoding and obtaining the physical topology structure of the power distribution area according to the address code obtained by decoding.

[0004] This application aims to solve the problem that "the transmission distance of the characteristic current is often short and it is easy to cause interference to the power distribution area. For example, in order to avoid signal interference to the power distribution area, the frequency of the characteristic current is often set relatively high, but too high frequency will cause the current to attenuate rapidly during transmission, resulting in the characteristic current signal not being received at the receiving end or the received characteristic current signal being weak. Therefore, the above-mentioned power distribution area topology identification method based on the characteristic current is actually only applicable within a short distance range. If a lower frequency characteristic current is used, it will cause signal interference to the power distribution area".

[0005] However, at present, the power safety monitoring means in the low-voltage power distribution area have not been innovated for a long time, and most of them implement monitoring according to a specified and single monitoring logic, resulting in a large room for improvement in the cable safety monitoring effect of the low-voltage power distribution area.

[0006] Therefore, a low-voltage intelligent monitoring system is proposed. Summary of the Invention

[0007] In view of the above-mentioned drawbacks of the prior art, the present invention provides a low-voltage intelligent monitoring system, which solves the technical problems raised in the above background art.

[0008] To achieve the above object, the present invention is realized by the following technical solutions:

[0009] A low-voltage intelligent monitoring system, comprising:

[0010] A collection module for collecting the daily operation parameters of the distribution transformer in the low-voltage area; a metering module for measuring the real-time cumulative power distribution of the distribution transformer in the low-voltage area; a sensing module for real-time sensing the operation vibration spectrum of the distribution transformer in the low-voltage area; an analysis module for receiving the daily operation parameters of the distribution transformer in the low-voltage area collected by the collection module and analyzing the safety situation of the operation state of the transformer based on the daily operation parameters of the transformer; a determination module for obtaining the safety situation of the operation state of the transformer analyzed by the analysis module, setting a safety determination threshold, and determining whether the operation state of the transformer is safe based on the comparison between the analysis result of the safety situation of the operation state of the transformer and the safety determination threshold; an interaction module for obtaining the determination result of whether the operation state of the transformer is safe by the determination module and feeding back the determination result to the system-side user.

[0011] Furthermore, the daily operation parameters of the transformer collected by the collection module include: primary side voltage, secondary side voltage, primary side current, secondary side current, capacity, power factor, and oil temperature. A sub-module is provided under the collection module, including:

[0012] A control unit for configuring the operation frequency for the collection module and controlling the collection module to continuously collect the daily operation parameters of the transformer based on the specified operation frequency;

[0013] A storage unit for receiving the daily operation parameters of the transformer collected by the collection module and collecting the daily operation parameters of the transformer;

[0014] Among them, three groups of operation frequencies are set in the control unit and are user-defined by the system-side user. The three groups of operation frequencies are applied to the valley, flat, and peak power periods during the process of collecting the daily operation parameters of the transformer. The collection frequencies configured for the valley, flat, and peak power periods obey: the collection frequency during the valley power period is lower than the collection frequency during the flat power period, and the collection frequency during the flat power period is lower than the collection frequency during the peak power period. When the storage module stores the daily operation parameters of the transformer, it stores them based on the chronological order of the collection frequencies and distinguishes and stores them based on the source periods of the collection frequencies.

[0015] Furthermore, sub-modules are provided inside the metering module, including:

[0016] A trigger unit for setting a trigger threshold, receiving in real time the power distribution of the transformer measured by the metering module, and triggering the operation of the analysis module based on the comparison between the measured power distribution of the transformer and the trigger threshold;

[0017] Among them, the triggering threshold set in the triggering unit is user-defined by the system-side user. The operation of the metering module to accumulate the real-time power distribution of the metering transformer is synchronously executed at the beginning stage of the system's load on the distribution transformer in the low-voltage area. The operation of the metering module to accumulate the real-time power distribution of the metering transformer is the cumulative output power of the transformer.

[0018] Furthermore, the sensing module is integrated by sensors capable of sensing the vibration spectrum of the transformer operation. The sensing module runs synchronously with the acquisition module. During the acquisition stage of the transformer operation parameters, it synchronously senses the vibration spectrum of the transformer operation. After the sensing module runs and senses the vibration spectrum of the transformer operation, it synchronously evaluates the vibration variation rate of the transformer operation based on the vibration spectrum of the transformer operation, and further decides to jump to the triggering unit based on the vibration variation rate of the transformer operation, and applies the triggering unit to trigger the jump again to make the analysis module run;

[0019] Among them, the metering module and the sensing module run synchronously in the system. The period for the sensing module to sense the vibration spectrum of the transformer operation is user-defined by the system-side user. The sensing module senses the vibration spectrum of the transformer operation based on the set period, and after each sensing of the vibration spectrum of the transformer operation, it executes the calculation of the vibration variation rate of this transformer operation. After the calculation of the vibration variation rate of the transformer operation is completed, the vibration spectrum of the transformer operation sensed by the sensing module is discarded, and the sensing operation of a new set of vibration spectra of the transformer is executed again.

[0020] Furthermore, the evaluation logic of the vibration variation rate of the transformer operation is expressed as:

[0021] Obtain the vibration spectrum of the transformer operation, divide the spectrum by hour to obtain several groups of sub-spectra; [[ID=We]]

[0022]

[0023] In the formula: is the vibration variation rate of the transformer operation; is the total amount of sub-spectra; is the similarity between the i-th sub-spectrum and the (i + 1)-th sub-spectrum; is the set of midpoints of the sub-spectrum; is the value of the j-th point in the i-th sub-spectrum; is the value of the j-th point in the (i + 1)-th sub-spectrum;

[0024] Among them, represents the average of . The sensing module runs to record the obtained vibration variation rate of the transformer operation. When the currently obtained vibration variation rate of the transformer operation is greater than the vibration variation rate of the transformer operation recorded in the previous set of sensing modules, it decides to jump to the triggering unit.

[0025] Furthermore, the logical expression for the analysis module to run and analyze the security situation of the transformer operation state is:

[0026] ;

[0027] In the formula: is the security situation value of the transformer operation state; are the security situation values of the transformer operation state during valley, flat, and peak power periods respectively; is the weight; is the calibration factor; is the security situation value of the transformer operation state during valley, flat, or peak power periods; is the total amount of the daily operation parameters of the transformer collected by the acquisition module; is the primary side voltage in the v - th group of parameters; is the secondary side voltage in the v - th group of parameters; is the primary side current in the v - th group of parameters; is the secondary side current in the v - th group of parameters; is the apparent power in the v - th group of parameters; is the power factor in the v - th group of parameters; is the oil temperature in the v - th group of parameters;

[0028] Among them, the weights are all greater than zero and their sum is 1, and , the apparent power is the transformer capacity in the daily operation parameters of the transformer, and the security situation value of the transformer operation state The smaller it is, the safer the transformer operation state is. On the contrary, it indicates a higher operation risk of the transformer.

[0029] Furthermore, the value of the calibration factor is 1 or 1.1;

[0030] During the operation stage of the analysis module, the trigger source of its own operation is synchronously identified. When the trigger source is the metering module, the value of the calibration factor is 1. When the trigger source is the sensing module, the value of the calibration factor is 1.1.

[0031] Furthermore, the security judgment threshold set in the judgment module is user - defined by the system - side user. There are sub - modules under the judgment module, including:

[0032] The adaptive unit is used to continuously receive the judgment results of the judgment module. When the continuous judgment results of the judgment module are negative, it controls the disconnection between the distribution transformer and the distribution line in the low - voltage distribution area;

[0033] Among them, the judgment condition for the continuous judgment results being negative is that there are no less than two consecutive groups of judgment results being negative.

[0034] Further, during the operation stage of the interaction module, it is connected to the computer device of the low-voltage area management background through a wireless network, and feeds back the determination result of whether the operation state of the transformer is safe to the computer device. The system-side user reads the determination result of whether the operation state of the transformer is safe on the computer device.

[0035] Further, the lower level of the acquisition module is interactively connected with a control unit and a storage unit through a wireless network. The acquisition module is interactively connected with a metering module and a sensing module through a wireless network. Inside the metering module, a trigger unit is interactively connected through a wireless network. The sensing module is interactively connected with the trigger unit through a wireless network. The metering module and the sensing module are interactively connected with an analysis module through a wireless network. The analysis module is interactively connected with a determination module and an interaction module through a wireless network. The lower level of the determination module is interactively connected with an adaptive unit through a wireless network.

[0036] Adopting the technical solution provided by the present invention, compared with the known public technologies, it has the following beneficial effects:

[0037] The present invention provides a low-voltage intelligent monitoring system. During the operation of the system, the low-voltage area distribution transformer is used as the main monitoring object, and the operation parameters of the transformer are comprehensively collected. At the same time, based on the two-way monitoring of the cumulative metering of transmitted electricity and the vibration spectrum of the transformer operation, different trigger conditions are provided for the analysis of the safety of the operation state of the transformer in the system, so as to realize the real-time monitoring and analysis of the distribution transformer in the low-voltage area. The operation state of the transformer is judged whether it is safe by applying comprehensive transformer operation parameters. Finally, the analysis result of the transformer operation state is mapped to the daily operation state safety of the low-voltage area, ensuring the long-term stable operation of the low-voltage area and bringing reliable power distribution services to the electricity users in the low-voltage area. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0039] Figure 1 It is a schematic structural diagram of a low-voltage intelligent monitoring system. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are only a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0041] The present invention will be further described below in conjunction with embodiments.

[0042] Embodiment:

[0043] A low-voltage intelligent monitoring system in this embodiment, as Figure 1 shown, includes:

[0044] A collection module, configured to collect the daily operation parameters of the distribution transformer in the low-voltage area;

[0045] The daily operation parameters of the transformer collected by the operation of the collection module include: primary side voltage, secondary side voltage, primary side current, secondary side current, capacity, power factor, and oil temperature. A sub-module is provided under the collection module, including:

[0046] A control unit, configured to configure an operating frequency for the collection module and control the collection module to continuously operate based on the specified operating frequency to collect the daily operation parameters of the transformer;

[0047] A storage unit, configured to receive the daily operation parameters of the transformer collected by the operation of the collection module and collect the daily operation parameters of the transformer;

[0048] Among them, three groups of operating frequencies are set in the control unit and are user-defined by the system end-user. The three groups of operating frequencies are applied to the valley, flat, and peak power periods during the process of the transformer collecting daily operation parameters. The collection frequencies configured for the valley, flat, and peak power periods follow: the collection frequency during the valley power period is lower than the collection frequency during the flat power period, and the collection frequency during the flat power period is lower than the collection frequency during the peak power period. When the storage module stores the daily operation parameters of the transformer, it stores them based on the chronological order of the collection frequencies and distinguishes and stores them based on the source periods of the collection frequencies;

[0049] A metering module, configured to meter the real-time cumulative power distribution of the distribution transformer in the voltage area;

[0050] Sub-modules are provided inside the metering module, including:

[0051] A trigger unit, configured to set a trigger threshold, receive in real time the power distribution of the transformer metered by the operation of the metering module, and trigger the operation of the analysis module based on the comparison between the metered power distribution of the transformer and the trigger threshold;

[0052] Among them, the triggering threshold set in the triggering unit is user-defined by the system-side user. The operation of the metering module to accumulate the power distribution of the metering transformer in real time is synchronously executed at the beginning stage of the system's load on the power distribution transformer in the low-voltage area. The operation of the metering module to accumulate the power distribution of the metering transformer in real time is the cumulative output power of the transformer.

[0053] The sensing module is used to sense the vibration spectrum of the power distribution transformer in the voltage area in real time.

[0054] The evaluation logic of the vibration variation rate of the transformer operation is expressed as:

[0055] Obtain the vibration spectrum of the transformer operation, divide the spectrum by hour to obtain several groups of sub-spectrums.

[0056]

[0057] In the formula: is the vibration variation rate of the transformer operation; is the total amount of sub-spectrums; is the similarity between the i-th sub-spectrum and the (i + 1)-th sub-spectrum; is the set of midpoints of the sub-spectrum; is the value of the j-th point in the i-th sub-spectrum; is the value of the j-th point in the (i + 1)-th sub-spectrum;

[0058] Among them, represents the average of . The sensing module records the obtained vibration variation rate of the transformer operation. When the currently obtained vibration variation rate of the transformer operation is greater than the vibration variation rate of the transformer operation recorded in the previous group by the sensing module, the decision jumps to the triggering unit.

[0059] The analysis module is used to receive the daily operation parameters of the power distribution transformer in the low-voltage area collected by the collection module and analyze the safety situation of the transformer operation state based on the daily operation parameters of the transformer.

[0060] Through the limitation of the evaluation logic formula of the vibration variation rate of the transformer operation above, another triggering operation logic is provided for the analysis module in this embodiment, ensuring that the monitoring effect of the system on the low-voltage area is more comprehensive.

[0061] The logic for the analysis module to analyze the safety situation of the transformer operation state is expressed as:

[0062] ;

[0063] In the formula: is the safety situation value of the transformer operation state; are the safety situation values of the transformer operation state during valley, flat, and peak power periods respectively. is the weight; is the calibration factor; is the safety situation value of the transformer's operating state during valley, flat or peak power periods; is the total amount of the transformer's daily operating parameters collected by the acquisition module; is the primary side voltage in the v-th group of parameters; is the secondary side voltage in the v-th group of parameters; is the primary side current in the v-th group of parameters; is the secondary side current in the v-th group of parameters; is the apparent power in the v-th group of parameters; is the power factor in the v-th group of parameters; is the oil temperature in the v-th group of parameters;

[0064] Among them, the weight are all greater than zero and the sum is 1, and , the apparent power is the transformer capacity in the transformer's daily operating parameters, and the safety situation value of the transformer's operating state The smaller it is, the safer the operating state of the transformer is. On the contrary, it means the higher the operating risk of the transformer;

[0065] Through the above logical formula, the safety situation of the transformer's operating state is output in a digital form, providing necessary operating data support for the operation of the subsequent modules of the system.

[0066] The value of the calibration factor is 1 or 1.1;

[0067] During the operation stage of the analysis module, the trigger source of its own operation is synchronously identified. When the trigger source is the metering module, the value of the calibration factor is 1. When the trigger source is the sensing module, the value of the calibration factor is 1.1;

[0068] The determination module is used to obtain the safety situation of the transformer's operating state analyzed by the analysis module, set a safety determination threshold, and determine whether the operating state of the transformer is safe based on the comparison between the analysis result of the transformer's operating state safety situation and the safety determination threshold;

[0069] The safety determination threshold set in the determination module is user-defined by the system end-user. There are sub-modules under the determination module, including:

[0070] The adaptive unit is used to continuously receive the determination results of the determination module. When the continuous determination results of the determination module are negative, it controls the disconnection between the distribution transformer in the low-voltage distribution area and the distribution line;

[0071] Among them, the determination condition for the continuous determination results being negative is that there are at least two consecutive groups of determination results being negative;

[0072] An interaction module, which is used to obtain the determination result of whether the operation of the determination module is safe for the operation state of the transformer, and feedback the determination result to the system-side user;

[0073] The lower level of the acquisition module is connected to a control unit and a storage unit through wireless network interaction. The acquisition module is connected to a metering module and a sensing module through wireless network interaction. The metering module is internally connected to a trigger unit through wireless network interaction. The sensing module is connected to the trigger unit through wireless network interaction. The metering module and the sensing module are connected to an analysis module through wireless network interaction. The analysis module is connected to a determination module and an interaction module through wireless network interaction. The lower level of the determination module is connected to an adaptive unit through wireless network interaction.

[0074] In this embodiment, the acquisition module runs to acquire the daily operation parameters of the distribution transformer in the low-voltage area. The control unit synchronously configures the operation frequency for the acquisition module, controls the acquisition module to continuously run based on the specified operation frequency to acquire the daily operation parameters of the transformer. The storage unit receives the daily operation parameters of the transformer acquired by the operation of the acquisition module in real time, and acquires the daily operation parameters of the transformer. The metering module runs later to measure the real-time cumulative power distribution of the distribution transformer in the low-voltage area. The trigger unit synchronously sets the trigger threshold, receives the power distribution of the transformer measured by the operation of the metering module in real time, and based on the comparison between the measured power distribution of the transformer and the trigger threshold, triggers the operation of the analysis module;

[0075] The sensing module further senses the operation vibration spectrum of the distribution transformer in the low-voltage area in real time. Then, the analysis module receives the daily operation parameters of the distribution transformer in the low-voltage area acquired by the operation of the acquisition module, analyzes the safety situation of the operation state of the transformer based on the daily operation parameters of the transformer. The determination module runs to obtain the safety situation of the operation state of the transformer analyzed by the operation of the analysis module, sets the safety determination threshold, and based on the comparison between the analysis result of the safety situation of the operation state of the transformer and the safety determination threshold, determines whether the operation state of the transformer is safe. The adaptive unit synchronously and continuously receives the determination result of the determination module. When the continuous determination result of the determination module is negative, it controls the disconnection between the distribution transformer in the low-voltage area and the distribution line. Finally, the interaction module obtains the determination result of whether the operation of the determination module is safe for the operation state of the transformer, and feedbacks the determination result to the system-side user.

[0076] Through the operation of the system in the above embodiment, comprehensive and real-time monitoring is brought to the distribution transformer in the low-voltage area, ensuring the more stable operation of the low-voltage area distribution network.

[0077] Such as Figure 1 As shown, during the operation stage of the interaction module, it is connected to the computer device of the low-voltage area management background through wireless network, and feedbacks the determination result of whether the operation state of the transformer is safe to the computer device. The system-side user reads the determination result of whether the operation state of the transformer is safe on the computer device.

[0078] Through the above settings, the interaction logic between the system and the low-voltage distribution area management background is further defined to ensure stable interaction between the system and the low-voltage distribution area management background, so as to more quickly conduct daily safety management of the low-voltage distribution area.

[0079] In summary, during the operation of the system in the above embodiments, the low-voltage distribution area power distribution transformer is used as the main monitoring object, and the operation parameters of the transformer are comprehensively collected. At the same time, based on the two-way monitoring of the cumulative metering of transmitted electricity and the operation vibration spectrum of the transformer, different trigger conditions are provided for the analysis of the safety of the transformer operation state in the system, so as to realize the real-time monitoring and analysis of the distribution transformer in the low-voltage distribution area, and use the comprehensive operation parameters of the transformer to determine whether the operation state of the transformer is safe. Finally, the analysis result of the transformer operation state is mapped to the daily operation state safety of the low-voltage distribution area, ensuring the long-term stable operation of the low-voltage distribution area and bringing reliable power distribution services to the electricity users in the low-voltage distribution area.

[0080] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments or equivalently replace some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low voltage intelligent monitoring system, characterized in that: include: The acquisition module is used to collect daily operating parameters of low-voltage distribution transformers; Metering module, used to measure the real-time cumulative power distribution of distribution transformers in voltage distribution areas; The perception module is used to perceive the operating vibration spectrum of the distribution transformer in the voltage station in real time; An analysis module is used to receive the daily operating parameters of the low-voltage distribution transformer in the substation collected by the collection module, and analyze the safety status of the transformer operation status based on the daily operating parameters of the transformer; A determination module is used to obtain the transformer operating status safety situation analyzed by the analysis module, set a safety determination threshold, and determine whether the transformer operating status is safe based on the comparison between the transformer operating status safety situation analysis result and the safety determination threshold; The interactive module is used to obtain the determination result of whether the operation of the determination module is safe for the transformer operation state, and feed back the determination result to the system end user; The perception module is integrated with a sensor capable of sensing the transformer operation vibration spectrum. The perception module runs synchronously with the acquisition module. During the transformer operation parameter acquisition phase, the perception module synchronously senses the transformer operation vibration spectrum. After the perception module senses the transformer operation vibration spectrum, it synchronously evaluates the transformer operation vibration variation rate based on the transformer operation vibration spectrum. It further decides to jump to the trigger unit based on the transformer operation vibration variation rate. The application trigger unit triggers the jump again to enable the analysis module to run. Among them, the metering module and the perception module run synchronously in the system. The period of the perception module's perception of the transformer operation vibration spectrum is customized by the system end user. The perception module perceives the transformer operation vibration spectrum based on the set period, and after each transformer operation vibration spectrum is perceived, the transformer operation vibration variation rate is calculated. After the transformer operation vibration variation rate is calculated, the transformer operation vibration spectrum perceived by the perception module is discarded, and the perception operation of a new set of transformer operation vibration spectra is performed again; The evaluation logic of the transformer operation vibration variation rate is expressed as: Obtain the transformer operating vibration spectrum and divide the spectrum into several groups of sub-spectra based on hourly units. ； Where: is the transformer operation vibration variation rate; is the total amount of sub-spectra; is the similarity between the i-th sub-spectrum and the i+1-th sub-spectrum; is the set of sub-spectrum midpoints; is the value of the jth point in the i-th sub-spectrum; is the value of the jth point in the i+1th sub-spectrum; in, Express The perception module runs to record the obtained transformer operation vibration variation rate. When the currently obtained transformer operation vibration variation rate is greater than the transformer operation vibration variation rate recorded in the previous set of perception modules, the decision jump trigger unit is made.

2. A low voltage intelligent monitoring system according to claim 1, characterized in that: The daily operating parameters of the transformer collected by the acquisition module include: primary side voltage, secondary side voltage, primary side current, secondary side current, capacity, power factor, and oil temperature. The acquisition module is provided with submodules at the lower level, including: A control unit is used to configure an operating frequency for the acquisition module, and control the acquisition module to continuously operate and collect daily operating parameters of the transformer based on the specified operating frequency; The storage unit is used to receive the daily operating parameters of the transformer collected by the collection module and collect the daily operating parameters of the transformer; Among them, three groups of operating frequencies are set in the control unit and customized by the system user. The three groups of operating frequencies are applied to the valley, flat and peak power periods in the process of transformer collecting daily operating parameters. The collection frequencies configured in the valley, flat and peak power periods are respectively subject to: the collection frequency in the valley power period is lower than the collection frequency in the flat power period, and the collection frequency in the flat power period is lower than the collection frequency in the peak power period. When the storage module stores the daily operating parameters of the transformer, it stores them based on the time sequence of the collection frequency and distinguishes the storage based on the source period of the collection frequency.

3. A low voltage intelligent monitoring system according to claim 1, characterized in that: The metering module is internally provided with submodules, including: The trigger unit is used to set the trigger threshold, receive the transformer power distribution measured by the metering module in real time, and trigger the analysis module to run based on the comparison between the measured transformer power distribution and the trigger threshold; Among them, the trigger threshold set in the trigger unit is customized by the system user, and the metering module runs the real-time cumulative power distribution operation of the metering transformer. The operation is synchronously executed by the system at the beginning of the low-voltage distribution transformer. The metering module runs the real-time cumulative power distribution operation of the metering transformer, which is the cumulative output power of the transformer.

4. A low voltage intelligent monitoring system according to claim 1, characterized in that: The logic expression of the analysis module running to analyze the transformer operating status safety situation is as follows: ； Where: is the transformer operating status safety situation value; The safety status values of the transformer's operating status during off-peak, flat and peak periods respectively; is the weight; is the calibration factor; The safety status value of the transformer's operating status during off-peak, flat or peak periods; Collect the total amount of transformer daily operating parameters for the acquisition module; is the primary side voltage in the vth group of parameters; is the secondary side voltage in the vth group of parameters; is the primary side current in the vth group of parameters; is the secondary side current in the vth group of parameters; is the apparent power in the vth group of parameters; is the power factor in the vth group of parameters; is the oil temperature in the vth group of parameters; Among them, the weight are all greater than zero and sum to 1, and , apparent power is the transformer capacity in the daily operation parameters of the transformer, and the transformer operating status safety status value The smaller it is, the safer the transformer operation state is; conversely, the higher the transformer operation risk is.

5. A low voltage intelligent monitoring system according to claim 4, characterized in that: The calibration factor takes a value of 1 or 1.1; During the operation phase of the analysis module, the trigger source of its own operation is synchronously identified. When the trigger source is the measurement module, the calibration factor is 1. When the trigger source is the perception module, the calibration factor is 1.

1.

6. A low voltage intelligent monitoring system according to claim 1, characterized in that: The safety determination threshold set in the determination module is customized by the system end user. The determination module is provided with submodules at the lower level, including: The adaptive unit is used to continuously receive the determination results of the determination module, and when the determination results of the determination module are continuously negative, control the low-voltage distribution transformer in the distribution line to be disconnected; The condition for the consecutive negative determination results is that there are at least two consecutive negative determination results.

7. A low voltage intelligent monitoring system according to claim 1, characterized in that: During the operation phase of the interactive module, the module is connected to the computer device of the low-voltage substation management background through a wireless network, and the determination result of whether the transformer operating status is safe is fed back to the computer device. The system end user reads the determination result of whether the transformer operating status is safe on the computer device.

8. The low voltage intelligent monitoring system according to claim 1, characterized in that: The acquisition module is interactively connected to a control unit and a storage unit at a lower level via a wireless network. The acquisition module is interactively connected to a metering module and a perception module via a wireless network. The metering module is interactively connected to a trigger unit inside via a wireless network. The perception module is interactively connected to the trigger unit via a wireless network. The metering module and the perception module are interactively connected to an analysis module via a wireless network. The analysis module is interactively connected to a determination module and an interaction module via a wireless network. The determination module is interactively connected to an adaptive unit at a lower level via a wireless network.

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