Intelligent secondary distribution network terminal of power system

Abstract

The invention relates to an intelligent secondary distribution network terminal of a power system, which is applied to the related technical field of a power distribution system, through the arrangement of a user side bidirectional interaction device, a user can sort the importance of electricity utilization in the bidirectional interaction device, and during the peak period of electricity utilization, the intelligent secondary distribution network terminal can roughly display the electricity utilization condition in an area, so that the power utilization efficiency is improved. According to the invention, on one hand, the user can adjust some unnecessary power consumption items to a non-power consumption peak, and on the other hand, the bidirectional interaction device can carry out temporary power-off processing on the power consumption items which are using power and are low in importance, and normal power supply is recovered after the power consumption peak is passed. Therefore, the effects of transversely lengthening the power utilization peak period and longitudinally reducing the power utilization peak value of the power utilization peak period are achieved, the problem of relieving the power utilization pressure is solved, the probability that the power system is abnormal due to the fact that the power utilization pressure is too large is greatly reduced, and safe and stable power supply of the power system is effectively guaranteed.

Description

Technical Field

[0001] The present invention relates to a secondary distribution network terminal, and in particular to an intelligent secondary distribution network terminal for a power system applied in the technical field related to power distribution systems. Background Art

[0002] With the rapid development of the power industry and the increasing demand for power supply reliability and intelligent management, traditional secondary distribution network terminals can no longer meet the complex needs of new power systems. Secondary distribution network terminals refer to terminal equipment used for secondary distribution networks in power systems, mainly used to monitor, control and manage distribution networks. They are usually installed on distribution transformers, switch cabinets and other equipment to achieve real-time monitoring and data collection of power systems.

[0003] In some special environments, such as extremely cold winter or extremely hot summer, users' electricity consumption surges, resulting in a multiple increase in peak electricity consumption during peak hours. In this case, the power demand and pressure of the power system surge, resulting in a higher possibility of power system failures, and prone to power outages caused by insufficient power supply, overheating and damage of power equipment, etc. Therefore, the distribution network is currently facing many challenges, such as the large-scale access of distributed power sources, the diversification and increased volatility of loads, and the increased difficulty in quickly locating and handling faults.

[0004] To solve the above problems, it is generally advocated to use electricity at off-peak times to alleviate the power consumption pressure of the power system. For example, the Chinese patent specification with publication number CN112529730A discloses a demand-side off-peak resource management system, and the Chinese patent specification with publication number CN114488972A discloses a production line off-peak scheduling method based on energy consumption data.

[0005] However, for home users, there are several problems. First, they cannot clearly understand the actual electricity consumption and are not sure whether it is the peak period. Second, for some time periods, electricity consumption is necessary, and it is difficult to coordinate and change the electricity consumption time, resulting in poor effect of staggered electricity consumption.

[0006] In this context, the research and development of new intelligent secondary distribution terminals for power systems with high intelligence, adaptability and good communication and interaction functions is of great significance for improving the operating efficiency of distribution networks, ensuring power supply quality and achieving efficient use of energy. Summary of the invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the existing power system has a large power consumption pressure during the peak power consumption period, and it is difficult to maintain a stable power supply of the power system.

[0008] To solve the above problems, the present invention provides an intelligent secondary distribution network terminal for an electric power system, comprising a power grid end, a user end and a two-way interactor for establishing data interaction between the power grid end and the user end, wherein the power grid end comprises a main control center, a data acquisition module, a data storage module, a fault warning module, peripheral equipment, an environmental monitoring module and an early warning module, wherein the data acquisition module comprises a current sensor, a voltage sensor and a power sensor installed on the power grid line, wherein the peripheral equipment comprises a switch device connected to the power equipment, a transformer detection unit and an environmental monitoring unit, wherein the transformer detection unit comprises a transformer temperature sensor installed on the transformer and a liquid level sensor for detecting the liquid level of insulating oil in the transformer, wherein the environmental monitoring unit comprises an environmental temperature sensor and a smoke sensor; The user end includes a sub-control center and a signal switch in the resident's home for controlling electrical equipment. The bidirectional interactor is installed on the user end through a USB interface, and the bidirectional interactor is connected to the signal switch signal of the electrical equipment.

[0009] In the above-mentioned intelligent secondary distribution network terminal of the power system, through the setting of the two-way interactive device at the user end, the user can sort the importance of electricity consumption in the two-way interactive device. During the peak electricity consumption period, it can roughly display the electricity consumption in the user's area, so that the user can timely understand the specific peak electricity consumption. On the one hand, the user himself can change some non-essential electricity consumption items to non-peak electricity consumption. On the other hand, the two-way interactive device can, with the consent of the user, temporarily cut off the power supply to the electricity consumption items that are in use and have low importance, and then restore normal power supply after the peak electricity consumption period, thereby achieving the effect of horizontally extending the peak electricity consumption period and vertically reducing the peak electricity consumption during the peak electricity consumption period, thereby alleviating the problem of electricity consumption pressure and greatly reducing the probability of abnormalities in the power system due to excessive electricity consumption pressure, thereby effectively ensuring the safe and stable power supply of the power system.

[0010] As a further improvement of the present application, before using the two-way interactive device, the user sets the importance level of the electrical equipment in the two-way interactive device according to his own needs, and the importance level is divided based on one or both of the necessity of use during peak hours of electricity consumption and the frequency of use.

[0011] An intelligent secondary distribution network terminal for a power system, the use method of which comprises the following steps: S1. The power system's daily power consumption data is collected through the data collection module. The main control center organizes and analyzes the power consumption data to obtain the peak power consumption period. At the same time, the power consumption data during the peak power consumption period is remotely sent to the two-way interactive device at the user end, and the two-way interactive device displays the power consumption; S2. The power consumption data and the transformer and ambient temperature data monitored by the peripheral equipment are stored in the data storage module. When the power system fails during the peak power consumption period, the relevant data in the data storage module can be retrieved and saved separately to provide data support for the fault prediction module; S3. When the fault prediction module predicts that there is a potential fault in the power system, the signal is transmitted to the two-way interactive device at the user end in the same area. At this time, the power consumption of the two-way interactive device is displayed at the highest level. The sub-control center determines that the power cut-off level has been reached based on the display; S4. The sub-control center controls the low-level power-consuming equipment to temporarily cut off the power. At the same time, the power consumption displayed by the two-way interactive device allows users to avoid the peak power consumption period to use new power-consuming equipment; S5. After the peak power consumption period has passed, the level of power consumption displayed by the two-way interactive device gradually decreases, and at this time the sub-control system resumes power supply to power-consuming devices with a low level of importance.

[0012] As a further improvement of the present application, the two-way interactor includes a shell with a USB interface, a control chip is installed inside the shell, a display screen is installed at the upper end of the shell, and the display screen is electrically connected to the control chip, a voice broadcast module and a button are also installed in the shell, the button and the voice broadcast module are all connected to the control chip, and the control chip is also electrically connected to a recording module.

[0013] As a further improvement of the present application, the display screen displays the power consumption during peak hours through multiple different color blocks, and the multiple color blocks use the same color with different depths. The darker the color, the higher the power consumption, and the darkest color block indicates that the power consumption is tending to saturation and the power consumption pressure is high.

[0014] As another improvement of the present application, the user end also includes a backup power supply, the backup power supply and the electrical equipment at the user end are electrically connected to the household circuit, and the electrical equipment and the backup power supply are connected in series, and the backup power supply is signal-connected to the sub-control center.

[0015] As another improvement supplement to the present application, the cables between the household circuit and the electrical equipment, between the household circuit and the charging end of the backup power supply, and between the electrical equipment and the discharging end of the backup power supply are all installed with signal switches, and the three signal switches are not turned on at the same time, and at most two signal switches are turned on at the same time.

[0016] As another improved supplement of the present application, the method for using the backup power supply at the user end is as follows: During non-peak hours, the sub-control center controls the air switches between the backup power supply and the household circuit, and between the household circuit and the electrical equipment to open, so that the backup power supply starts to charge, and the electrical equipment is normally powered by the household circuit, that is, the power system is normally powered; During peak power consumption periods, the sub-control center controls the air switches between the household circuit and the backup power supply and the charging equipment to be closed, and the air switches between the power equipment and the backup power supply to be opened. At this time, the backup power supply supplies power to the power equipment, which not only effectively guarantees the normal power consumption of users during peak power consumption periods, but also is not easy to generate power consumption pressure on the power system during peak power consumption periods, thus achieving the redistribution of power consumption time, effectively alleviating the power consumption pressure problem caused by too many external devices during peak power consumption periods, and greatly reducing the safety hazards caused by power consumption pressure.

[0017] In summary, through the setting of the two-way interactive device on the user side, the user can sort the importance of electricity consumption in the two-way interactive device. During the peak electricity consumption period, it can roughly display the electricity consumption in the user's area, so that the user can timely understand the specific peak electricity consumption. On the one hand, the user can change some non-essential electricity consumption items to non-peak electricity consumption. On the other hand, the two-way interactive device can, with the consent of the user, temporarily cut off the power supply to the electricity consumption items that are in use and have low importance, and then restore normal power supply after the peak electricity consumption period, thereby achieving the effect of horizontally extending the peak electricity consumption period and vertically reducing the peak electricity consumption during the peak electricity consumption period, thereby alleviating the problem of electricity consumption pressure and greatly reducing the probability of abnormalities in the power system due to excessive electricity consumption pressure, thereby effectively ensuring the safe and stable power supply of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a main principle block diagram of the first implementation method of this application; Figure 2 This is a main block diagram of the data acquisition module and peripheral devices of the first embodiment of the present application; Figure 3 This is a main flow chart of the grid side in the first embodiment of the present application; Figure 4 This is the main flow chart when the user terminal performs peak shifting in the first implementation mode of the present application; Figure 5 This is a schematic diagram of the principle of alleviating power consumption pressure during peak hours according to the first implementation method of the present application; Figure 6 This is a three-dimensional schematic diagram of a two-way interactive device according to a first embodiment of the present application; Figure 7 This is a schematic diagram of a power system at a user end according to a second embodiment of the present application; Figure 8 This is a schematic diagram of user-side electricity consumption in the second implementation mode of the present application. DETAILED DESCRIPTION

[0019] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0020] The first implementation method: Figure 1 It shows an intelligent secondary distribution network terminal of a power system, including a power grid end, a user end and a two-way interactor for establishing data interaction between the power grid end and the user end, wherein the power grid end includes a main control center, a data acquisition module, a data storage module, a fault warning module, peripheral equipment, an environmental monitoring module and a warning module; like Figure 2 The data acquisition module includes a current sensor, a voltage sensor and a power sensor installed on the power grid line. The peripheral equipment includes a switchgear connected to the power equipment, a transformer detection unit and an environmental monitoring unit. The transformer detection unit includes a transformer temperature sensor installed on the transformer and a liquid level sensor for detecting the insulating oil level in the transformer. It mainly monitors the use of the transformer, so as to timely detect abnormal conditions of the transformer, so that the staff can perform maintenance in time and reduce the adverse effects on the power system. The environmental monitoring unit includes an environmental temperature sensor and a smoke sensor, which is mainly used to monitor the surrounding environment, so as to timely detect abnormal conditions such as overheating and fire, so as to timely eliminate hidden dangers and reduce safety hazards. When the environmental monitoring unit detects a fire, it can control the switchgear connected to the power equipment to cut off the power, thereby effectively limiting the scope of influence of the fire and improving safety. The user end includes a sub-control center and a signal switch for controlling electrical equipment in residents' homes. The two-way interactive device is installed on the user end through a USB interface, and the two-way interactive device is connected to the signal switch signal of the electrical equipment. The two-way interactive device can effectively display the power consumption in the same area. When the power consumption is too concentrated, the more color blocks it displays and the darker the color. When it reaches the highest level, it means that the power consumption in the same period in the area is close to the peak value that the power system can bear. At this time, the user can effectively adjust the power consumption plan according to the display, such as moving some non-essential power consumption items in the same period to the back, so as to stagger this period, such as Figure 5 , the effect of reducing the peak power consumption in the same period can be achieved by extending the power consumption period. Compared with the existing technology, the user's power consumption is more intuitive, and the peak power consumption can be staggered relatively accurately, which is more effective in reducing the power consumption pressure of the power system.

[0021] like Figure 3-Figure 4 , an intelligent secondary distribution network terminal for a power system, and a method for using the terminal comprises the following steps: S1. The power system's daily power consumption data is collected through the data collection module. The main control center organizes and analyzes the power consumption data to obtain the peak power consumption period. At the same time, the power consumption data during the peak power consumption period is remotely sent to the two-way interactive device at the user end, and the two-way interactive device displays the power consumption; S2. The power consumption data and the transformer and ambient temperature data monitored by the peripheral equipment are stored in the data storage module. When the power system fails during the peak power consumption period, the relevant data in the data storage module can be retrieved and saved separately to provide data support for the fault prediction module; S3. When the fault prediction module predicts that there is a potential fault in the power system, the signal is transmitted to the two-way interactive device at the user end in the same area. At this time, the two-way interactive device increases the display level of power consumption to the highest level. The sub-control center determines that the power-off condition is met based on the display; It is worth noting that when the power consumption of the two-way interactive device shows the highest level, it means that the power-off condition has been reached; S4, such as Figure 5 The sub-control center controls the low-level power-consuming equipment to temporarily cut off the power. At the same time, the power consumption displayed by the two-way interactive device can remind users to avoid the peak power consumption period when using new power-consuming equipment, so as to reduce the power consumption of some users at the same time, thereby reducing the power consumption pressure of the power system at this time, reducing the probability of fault hidden dangers directly developing into real faults, and buying a certain amount of maintenance time for the staff; It is worth noting that when the fault prediction module concludes that there is no hidden fault risk, the power consumption display of the two-way interactive device is displayed according to the actual power consumption; S5. After the peak power consumption period has passed, the level of power consumption displayed by the two-way interactive device gradually decreases, and at this time the sub-control system resumes power supply to power-consuming devices with a low level of importance.

[0022] like Figure 6 Before using the two-way interactive device, the user sets the importance level of the electrical equipment in the two-way interactive device according to his own needs. The importance level is divided according to one or both of the necessity of use during peak power consumption hours and the frequency of use. The two-way interactive device includes a shell with a USB interface, a control chip is installed inside the shell, a display screen is installed on the upper end of the shell, and the display screen is electrically connected to the control chip. A voice broadcast module and a button are also installed in the shell. The button and the voice broadcast module are both connected to the control chip. The control chip is also electrically connected to a recording module. The display screen displays the power consumption during peak power consumption hours through multiple different color blocks, and the multiple color blocks use the same color with different depths, and the darker the color, the higher the power consumption, and the darkest color block indicates that the power consumption tends to be saturated and the power consumption pressure is large.

[0023] When the power consumption in the area is about to exceed the power supply capacity of the power system, the two-way interactive device can notify the user through the voice broadcast module that one or more power devices are about to be shut down. If the user needs electricity at this moment, the voice interaction can be used to not shut down the relevant power devices. If the power consumption is not necessary, the user can agree to shut down the relevant power devices, so as to reduce the impact on the user's normal power consumption; The recording module can record the number of times that non-essential power equipment is agreed to be shut down during peak power consumption periods. When the number of times accumulates to a certain number, it can be fed back to the power system. The staff of the power system can make certain rewards based on it, such as issuing electricity coupons, discounts, gifts, etc., so that more users can actively participate in the regulation of the horizontal span and vertical peak value of the peak power period, thereby effectively maintaining the stability of the power supply of the power system.

[0024] To sum up, through the setting of the two-way interactive device at the user end, the user can sort the importance of electricity consumption in the two-way interactive device. During the peak electricity consumption period, it can roughly display the electricity consumption in the user's area, so that the user can timely understand the specific peak electricity consumption. On the one hand, the user himself can change some non-essential electricity consumption items to non-peak electricity consumption. On the other hand, the two-way interactive device can, with the consent of the user, temporarily cut off the power supply to the electricity consumption items that are in use and have low importance, and then restore normal power supply after the peak electricity consumption period, thereby achieving the effect of horizontally extending the peak electricity consumption period and vertically reducing the peak electricity consumption during the peak electricity consumption period, thereby alleviating the problem of electricity consumption pressure and greatly reducing the probability of abnormalities in the power system due to excessive electricity consumption pressure, thereby effectively ensuring the safe and stable power supply of the power system.

[0025] The second implementation method: This implementation mode is based on the first implementation mode, in which a backup power supply is added at the user end, and the rest of the parts are consistent with the first implementation mode.

[0026] Figure 7 It is shown that the user end also includes a backup power supply, and the backup power supply and the electrical equipment at the user end are electrically connected to the household circuit, and the electrical equipment and the backup power supply are connected in series, and the backup power supply is signal-connected to the sub-control center, and the cables between the household circuit and the electrical equipment, between the household circuit and the charging end of the backup power supply, and between the electrical equipment and the discharge end of the backup power supply are all installed with signal switches, and the three signal switches are not turned on at the same time, and at most two signal switches are turned on at the same time.

[0027] like Figure 8 , the method for using the backup power supply at the user end is: During non-peak hours, the sub-control center controls the air switches between the backup power supply and the household circuit, and between the household circuit and the electrical equipment to open, so that the backup power supply starts to charge, and the electrical equipment is normally powered by the household circuit, that is, the power system is normally powered; During peak hours of electricity consumption, the sub-control center controls the air switches between the household circuit and the backup power supply and the charging device to be closed, and the air switches between the electrical equipment and the backup power supply to be opened. At this time, the backup power supply supplies power to the electrical equipment.

[0028] In this embodiment, by setting up a backup power supply on the user side, electricity can be stored during non-peak hours, and some power equipment on the user side can be powered during peak hours. This not only effectively guarantees the normal power supply to users during peak hours, but also is not likely to generate power pressure on the power system during peak hours. This achieves the redistribution of power consumption time, effectively alleviates the power pressure problem caused by too many external devices during peak hours, and greatly reduces the safety hazards caused by power pressure.

[0029] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An intelligent secondary distribution network terminal for a power system, characterized in that: It includes a power grid end, a user end and a two-way interactor for establishing data interaction between the power grid end and the user end. The power grid end includes a main control center, a data acquisition module, a data storage module, a fault warning module, peripheral equipment, an environmental monitoring module and a warning module. The data acquisition module includes a current sensor, a voltage sensor and a power sensor installed on the power grid line. The peripheral equipment includes a switch device connected to the power equipment, a transformer detection unit and an environmental monitoring unit. The transformer detection unit includes a transformer temperature sensor installed on the transformer and a liquid level sensor for detecting the insulating oil liquid level in the transformer. The environmental monitoring unit includes an environmental temperature sensor and a smoke sensor; The user end includes a sub-control center and a signal switch in a resident's home for controlling electrical equipment. The bidirectional interactor is installed on the user end through a USB interface, and the bidirectional interactor is connected to the signal switch signal of the electrical equipment.

2. The intelligent secondary distribution network terminal of a power system according to claim 1, characterized in that: Before using the two-way interactive device, the user sets the importance level of the electric equipment in the two-way interactive device according to his / her own needs. The importance level is divided according to one or both of the necessity of use during peak hours and the frequency of use.

3. The intelligent secondary distribution network terminal of a power system according to claim 2, characterized in that: The method of use includes the following steps: S1. The power system's daily power consumption data is collected through the data collection module. The main control center organizes and analyzes the power consumption data to obtain the peak power consumption period. At the same time, the power consumption data during the peak power consumption period is remotely sent to the two-way interactive device at the user end, and the two-way interactive device displays the power consumption; S2. The power consumption data and the transformer and ambient temperature data monitored by the peripheral equipment are stored in the data storage module. When the power system fails during the peak power consumption period, the relevant data in the data storage module can be retrieved and saved separately to provide data support for the fault prediction module; S3. When the fault prediction module predicts that there is a potential fault in the power system, the signal is transmitted to the two-way interactive device at the user end in the same area. At this time, the power consumption of the two-way interactive device is displayed at the highest level. The sub-control center determines that the power cut-off level has been reached based on the display; S4. The sub-control center controls the low-level power-consuming equipment to temporarily cut off the power. At the same time, the power consumption displayed by the two-way interactive device allows users to avoid the peak power consumption period to use new power-consuming equipment; S5. After the peak power consumption period has passed, the level of power consumption displayed by the two-way interactive device gradually decreases, and at this time the sub-control system resumes power supply to power-consuming devices with a low level of importance.

4. The intelligent secondary distribution network terminal of a power system according to claim 1, characterized in that: The two-way interactive device includes a shell with a USB interface, a control chip is installed inside the shell, a display screen is installed on the upper end of the shell, and the display screen is electrically connected to the control chip, a voice broadcast module and a button are also installed in the shell, the button and the voice broadcast module are both connected to the control chip, and the control chip is also electrically connected to a recording module.

5. The intelligent secondary distribution network terminal of a power system according to claim 4, characterized in that: The display screen displays power consumption during peak hours through a plurality of different color blocks, and the plurality of color blocks use the same color with different depths, and the darker the color, the higher the power consumption, and the darkest color block indicates that the power consumption is approaching saturation and the power consumption pressure is high.

6. The intelligent secondary distribution network terminal of a power system according to claim 1, characterized in that: The user end also includes a backup power supply, which and the electrical equipment at the user end are both electrically connected to the household circuit, and the electrical equipment and the backup power supply are connected in series, and the backup power supply is signal-connected to the sub-control center.

7. The intelligent secondary distribution network terminal of a power system according to claim 6, characterized in that: The cables between the household circuit and the electrical equipment, between the household circuit and the charging end of the backup power supply, and between the electrical equipment and the discharging end of the backup power supply are all installed with signal switches, and the three signal switches are not turned on at the same time, and at most two signal switches are turned on at the same time.

8. The intelligent secondary distribution network terminal of a power system according to claim 7, characterized in that: The method for using the backup power supply at the user end is as follows: During non-peak hours, the sub-control center controls the air switches between the backup power supply and the household circuit, and between the household circuit and the electrical equipment to open, so that the backup power supply starts to charge, and the electrical equipment is normally powered by the household circuit, that is, the power system is normally powered; During peak hours of electricity consumption, the sub-control center controls the air switches between the household circuit and the backup power supply and the charging device to be closed, and the air switches between the electrical equipment and the backup power supply to be opened. At this time, the backup power supply supplies power to the electrical equipment.

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