An intelligent secondary distribution network terminal for a power system

Abstract

The present invention relates to an intelligent secondary distribution network terminal for the power system in the related technical field of the distribution system. Through the setting of the user-side two-way interactive device, users can sort the importance of electricity consumption in the two-way interactive device. During peak electricity consumption periods, it can roughly display the electricity consumption situation in the area, facilitating users to timely understand the specific electricity consumption situation. On the one hand, users can adjust some non-essential electricity-consuming items to off-peak hours. On the other hand, the two-way interactive device can temporarily cut off the power supply for the electricity-consuming items that are in use and have a low importance level, and then restore normal power supply after passing the peak electricity consumption period, so as to achieve the effect of horizontally stretching the peak electricity consumption period and simultaneously vertically reducing the electricity consumption peak value during the peak electricity consumption period, thereby realizing the problem of alleviating the electricity consumption pressure, greatly reducing the probability of abnormal conditions in the power system caused by excessive electricity consumption pressure, and effectively ensuring the safe and stable power supply of the power system.

Description

Technical Field

[0001] A secondary distribution network terminal related to the present invention, in particular, an intelligent secondary distribution network terminal for power systems in the related technical field of distribution systems. Background Art

[0002] With the rapid development of the power industry and the continuous improvement of society's requirements for power supply reliability and intelligent management, traditional secondary distribution network terminals have been difficult to meet the complex needs of new power systems. A secondary distribution network terminal refers to a terminal device used in the secondary distribution network of a power system, mainly for monitoring, controlling, and managing the distribution network. It is usually installed on equipment such as distribution transformers and switch cabinets to achieve real-time monitoring and data collection of the power system.

[0003] In some special environments, such as extremely cold in winter or extremely hot in summer, the electricity consumption of users surges, resulting in a multiple increase in the electricity peak value during peak electricity consumption periods. In this case, the electricity demand and pressure of the power system surge, increasing the possibility of power system failures, and prone to power outages caused by insufficient power supply, overheating and damage of power equipment, etc. Therefore, currently, the distribution network faces many challenges such as a large number of distributed power sources being connected, diverse and volatile loads, and increased difficulty in quickly locating and handling faults.

[0004] To solve the above problems, off-peak electricity consumption is generally advocated to relieve the electricity pressure of the power system. For example, a demand-side off-peak resource management system disclosed in the Chinese patent specification with the publication number CN112529730A, and an off-peak production scheduling method for production lines based on energy consumption data disclosed in the Chinese patent specification with the publication number CN114488972A.

[0005] However, for household users, there are the following problems. First, they cannot clearly understand the actual electricity consumption situation and are unsure whether it is a peak electricity consumption 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 off-peak electricity consumption effects.

[0006] In this context, the research and development of a new type of intelligent secondary distribution network terminal for power systems with high intelligence, adaptability, and good communication and interaction functions is of great significance for improving the operation efficiency of the distribution network, ensuring power supply quality, and realizing the efficient utilization of energy. Summary of the Invention

[0007] Aiming at the above-mentioned existing technologies, the technical problem to be solved by the present invention is that the existing power system has a large electricity pressure during peak electricity consumption periods and it is not easy to maintain stable power supply to the power system.

[0008] To solve the above problems, the present invention provides an intelligent secondary distribution network terminal for a power system, which includes a power grid end, a user end, and a two-way interactive device 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 devices, an environment 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 devices include switch devices connected to power equipment, a transformer detection unit, and an environment monitoring unit. The transformer detection unit includes a transformer temperature sensor installed on the transformer and a liquid level sensor for detecting the liquid level of insulating oil in the transformer. The environment monitoring unit includes an environmental temperature sensor and a smoke sensor;

[0009] 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 signal-connected to the signal switch of the electrical equipment.

[0010] In the above 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 peak electricity consumption periods, it can roughly display the electricity consumption situation in the user's area, facilitating the user to timely understand the specific peak electricity consumption. On the one hand, the user himself can change some non-essential electricity consumption items to off-peak periods. On the other hand, with the user's consent, the two-way interactive device can temporarily cut off the power supply for the electricity consumption items that are currently in use and have a low importance level, and then resume normal power supply after passing the peak electricity consumption period, so as to achieve the effect of horizontally stretching the peak electricity consumption period and vertically reducing the electricity consumption peak value during the peak electricity consumption period, thereby realizing the problem of alleviating the electricity consumption pressure, greatly reducing the probability of abnormal conditions in the power system caused by excessive electricity consumption pressure, and effectively ensuring the safe and stable power supply of the power system.

[0011] As a further improvement of this 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. The basis for dividing the importance level is one or both of the necessity of use and the usage frequency during peak electricity consumption periods.

[0012] An intelligent secondary distribution network terminal for a power system, its usage method includes the following steps:

[0013] S1. Collect the daily electricity consumption data of the power system through the data acquisition module. The main control center sorts out and analyzes the electricity consumption data to obtain the peak electricity consumption period, and at the same time remotely sends the electricity consumption data during the peak electricity consumption period to the two-way interactive device at the user end, and the two-way interactive device displays the electricity consumption;

[0014] S2. The electricity consumption data, as well as the transformer and ambient temperature data monitored by the peripheral devices, are all stored in the data storage module. When a fault occurs in the power system during peak electricity consumption periods, the relevant data in the data storage module can be retrieved and this part of the data is separately saved to provide data support for the fault prediction module;

[0015] S3. When the fault prediction module predicts that there are potential faults in the power system, this signal is transmitted to the two-way interactors at the user ends in the same area. At this time, the electricity consumption displayed by the two-way interactors reaches the highest level, and the sub-control center determines that the power cut-off level is reached based on this display;

[0016] S4. The sub-control center controls the power supply of electrical equipment with a lower importance level to be temporarily cut off. At the same time, the electricity consumption displayed by the two-way interactors enables users to avoid using new electrical equipment during peak electricity consumption periods;

[0017] S5. When crossing the peak electricity consumption period, the level of electricity consumption displayed by the two-way interactors gradually decreases. At this time, the sub-control system resumes the power supply to the electrical equipment with a lower importance level.

[0018] As a further improvement of the present application, the two-way interactor includes a housing with a USB interface. A control chip is installed inside the housing. A display screen is installed at the upper end of the housing, and the display screen is electrically connected to the control chip. A voice broadcast module and buttons are also installed inside the housing. The buttons and the voice broadcast module are both connected to the control chip, and the control chip is also electrically connected to a recording module.

[0019] As a further improvement of the present application, the display screen displays the electricity consumption during peak electricity consumption periods through multiple different color blocks. The multiple color blocks use the same color with different depths, and the darker the color, the higher the electricity consumption. The color block with the darkest color indicates that the electricity consumption tends to be saturated and the power consumption pressure is high.

[0020] As another improvement of the present application, the user end further includes a backup power supply. The backup power supply and the electrical equipment at the user end are both electrically connected to the household circuit, and the electrical equipment is connected in series with the backup power supply. The backup power supply is signal-connected to the sub-control center.

[0021] As a supplementary improvement of the present application, signal switches are installed on 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. The three signal switches are not turned on simultaneously, and at most two signal switches can be turned on simultaneously.

[0022] As a supplementary improvement of the present application, the usage method of the backup power supply at the user end is as follows:

[0023] During off-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 appliances to turn on, enabling the backup power supply to start charging. The electrical appliances are normally powered by the household circuit, i.e., by the power system.

[0024] During peak hours, the sub-control center controls the air switches between the household circuit, the backup power supply, and the charging equipment to turn off, and the air switch between the electrical appliances and the backup power supply to turn on. At this time, the backup power supply powers the electrical appliances, effectively ensuring that users can use electricity normally during peak hours, and at the same time, it is not easy to generate electricity pressure on the power system during peak hours, achieving a redistribution of electricity usage time, effectively alleviating the electricity pressure problem caused by too many external devices during peak hours, and greatly reducing the safety hazards brought by electricity pressure.

[0025] In summary, through the setting of the user-side two-way interactive device, users can sort the importance of electricity usage in the two-way interactive device. During peak hours, it can roughly display the electricity usage situation in the user's area, facilitating users to promptly understand the specific peak hours. On the one hand, users themselves can change some non-essential electricity-consuming items to off-peak hours. On the other hand, with the user's consent, the two-way interactive device can temporarily cut off the power supply for electricity-consuming items with low importance that are currently in use and restore normal power supply after passing the peak hours, thereby achieving the effect of horizontally stretching the peak hours and vertically reducing the electricity peak value during peak hours, thus alleviating the electricity pressure problem, greatly reducing the probability of abnormal power systems caused by excessive electricity pressure, and effectively ensuring the safe and stable power supply of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is the main principle block diagram of the first embodiment of the present application;

[0027] Figure 2 It is the main block diagram of the data acquisition module and peripheral devices of the first embodiment of the present application;

[0028] Figure 3 It is the main process block diagram of the grid side of the first embodiment of the present application;

[0029] Figure 4 It is the main flowchart of peak shaving at the user side of the first embodiment of the present application;

[0030] Figure 5 It is the schematic diagram of the principle of alleviating the electricity pressure during peak hours of the first embodiment of the present application;

[0031] Figure 6 It is the three-dimensional schematic diagram of the two-way interactive device of the first embodiment of the present application;

[0032] Figure 7 This is a schematic diagram of a power system at a user end according to a second embodiment of the present application;

[0033] Figure 8 This is a schematic diagram of user-side electricity consumption in the second implementation mode of the present application. DETAILED DESCRIPTION

[0034] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0035] The first implementation method:

[0036] 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;

[0037] 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.

[0038] 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, it achieves the effect of reducing the peak electricity consumption during the same period by stretching the electricity consumption period. Compared with the prior art, the intuitiveness of user electricity consumption is stronger, and the electricity consumption peak can be relatively accurately staggered, resulting in a better effect of reducing the electricity consumption pressure on the power system.

[0039] Such as Figure 3 - Figure 4 , an intelligent secondary distribution network terminal for a power system, and its usage method includes the following steps:

[0040] S1. The data acquisition module collects the daily electricity consumption data of the power system, and the main control center sorts and analyzes the electricity consumption data to obtain the peak electricity consumption period. At the same time, the electricity consumption data during the peak electricity consumption period is remotely sent to the two-way interactive device at the user end, and the two-way interactive device displays the electricity consumption;

[0041] S2. The electricity consumption data and the transformer and ambient temperature data monitored by the peripheral devices are all stored in the data storage module. When a fault occurs in the power system during the peak electricity consumption period, the relevant data in the data storage module can be retrieved and this part of the data is separately saved to provide data support for the fault prediction module;

[0042] S3. When the fault prediction module predicts that there are potential faults 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 raises the display level of the electricity consumption to the highest level, and the sub-control center determines that the power-off condition is reached according to this display;

[0043] It should be noted that when the electricity consumption display of the two-way interactive device is at the highest level, it means that the power-off condition is reached;

[0044] S4. Such as Figure 5 , the sub-control center controls the power supply of the electrical equipment with a low importance level to be temporarily cut off. At the same time, the electricity consumption displayed by the two-way interactive device can prompt the user to avoid using new electrical equipment during the peak electricity consumption period, so as to reduce the electricity consumption of some user ends during the same period, thereby reducing the electricity consumption pressure on the power system at this time, reducing the probability that potential faults directly develop into real faults, and buying some maintenance time for the staff;

[0045] It should be noted that when the conclusion analyzed by the fault prediction module is that there are no potential faults, the electricity consumption display of the two-way interactive device is displayed according to the actual electricity consumption situation;

[0046] S5. When crossing the peak electricity consumption period, the display level of the electricity consumption displayed by the two-way interactive device gradually decreases, and at this time the sub-control system resumes the power supply to the electrical equipment with a low importance level.

[0047] Such as Figure 6, before the two-way interactor is used, the user sets the importance level of the electrical equipment in the two-way interactor according to their own needs. The basis for dividing the importance level is one or both of the necessity of use and the usage frequency during peak power consumption periods. The two-way interactor includes a housing with a USB interface. A control chip is installed inside the housing. A display screen is installed at the upper end of the housing, and the display screen is electrically connected to the control chip. A voice broadcast module and a button are also installed inside the housing. 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 periods through multiple different color blocks. The multiple color blocks use the same color with different depths. The darker the color, the higher the power consumption. The color block with the darkest color indicates that the power consumption tends to be saturated and the power consumption pressure is high.

[0048] When the power consumption in the area is about to exceed the power supply capacity of the power system, the two-way interactor can notify the user through the voice broadcast module to turn off one or more electrical equipment. When the user needs to use electricity at this moment, they can use voice interaction to not turn off the relevant electrical equipment. When it is not necessary to use electricity, they can agree to turn it off, so as to reduce the impact on the user's normal electricity use.

[0049] Among them, the recording module can record the number of times of agreeing to turn off non-essential electrical equipment during peak power consumption periods. When the number accumulates to a certain amount, it can be fed back to the power system. The staff of the power system can give certain rewards according to it, such as issuing electricity fee coupons, discounts, gifts, etc., so that more users can actively participate in the regulation of the horizontal span and vertical peak of peak power consumption periods, and then effectively maintain the stability of the power system's power supply.

[0050] To sum up, through the setting of the two-way interactor at the user end, the user can sort the importance of electricity use in the two-way interactor. During peak power consumption periods, it can roughly display the electricity use situation in the user's area, facilitating the user to timely understand the specific peak power consumption. On the one hand, the user themselves can change some non-essential electricity use items to non-peak power consumption periods. On the other hand, with the user's consent, the two-way interactor can temporarily cut off the power supply of the electrical use items with low importance that are currently in use and restore normal power supply after passing through the peak power consumption period, so as to achieve the effect of horizontally lengthening the peak power consumption period and vertically reducing the power consumption peak during the peak power consumption period, thereby alleviating the power consumption pressure problem and greatly reducing the probability of abnormal power systems caused by excessive power consumption pressure, thus effectively ensuring the safe and stable power supply of the power system.

[0051] The second implementation method:

[0052] Based on the first implementation method, a backup power supply is newly added at the user end, and the rest is the same as the first implementation method.

[0053] Figure 7 It is shown that the client further includes a backup power supply. The backup power supply and the electrical devices of the client are both electrically connected to the household circuit, and the electrical devices are connected in series with the backup power supply. The backup power supply is signal-connected to the sub-control center. Signal switches are installed on the cables between the household circuit and the electrical devices, between the household circuit and the charging end of the backup power supply, and between the electrical devices and the discharging end of the backup power supply. And the three signal switches are not turned on simultaneously, and at most two signal switches are turned on simultaneously.

[0054] As Figure 8 , the usage method of the backup power supply of the client is as follows:

[0055] During the non-peak electricity consumption period, 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 devices to be turned on, so that the backup power supply starts to charge, and the electrical devices are normally powered by the household circuit, that is, normally powered by the power system;

[0056] During the peak electricity consumption period, the sub-control center controls the air switches between the household circuit and the backup power supply and the charging device to be turned off, and the air switch between the electrical devices and the backup power supply to be turned on. At this time, the backup power supply supplies power to the electrical devices.

[0057] In this embodiment, through the setting of the backup power supply of the client, electric power can be stored during the non-peak electricity consumption period and some electric power devices of the client can be powered during the peak electricity consumption period. This not only effectively guarantees the normal electricity consumption of users during the peak electricity consumption period, but also is not likely to cause an electricity consumption pressure on the power system during the peak electricity consumption period, achieving a redistribution of the electricity consumption time, effectively alleviating the electricity consumption pressure problem caused by too many external devices during the peak electricity consumption period, and greatly reducing the safety hazards brought by the electricity consumption pressure.

[0058] Combined with the current actual requirements, the above-mentioned implementation manner adopted by this application, the protection scope is not limited thereto. Within the knowledge scope of those skilled in the art, various changes made without departing from the concept of this application still fall within the protection scope 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 interactive device is installed in the user end through a USB interface, and the bidirectional interactive device is connected to the signal switch signal of the electrical equipment. 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 / her own needs, and the importance level is divided according to one or both of the necessity of use during peak hours of electricity consumption and the frequency of use; 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.

2. 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.

3. The intelligent secondary distribution network terminal of a power system according to claim 2, 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 colors of 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.

4. 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.

5. The intelligent secondary distribution network terminal of a power system according to claim 4, 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.

6. The intelligent secondary distribution network terminal of a power system according to claim 5, 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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