CN218241709U - Automatic switching device for low-voltage user switch in small-power high-loss transformer area - Google Patents
Automatic switching device for low-voltage user switch in small-power high-loss transformer area Download PDFInfo
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Abstract
The application relates to an automatic switching device for a low-voltage user switch in a small-power high-loss transformer area, which comprises a transformer (1), a control switch (2), an intelligent electric meter (3), a user side switch (4), a load (5), a bypass large resistor (6) connected with the control switch (2) and the intelligent electric meter (3) in parallel, a current sensing module (7) arranged between the intelligent electric meter (3) and the user side switch (4), and a processor (8) connected with the control switch (2) and the current sensing module (7); the processor (8) is used for controlling the on-off of the control switch (2) according to the sensing signal sent by the current sensing module (7) and a preset instruction. This application realizes the automation of control switch through perception load state change and puts in and move back, reduces platform district user side smart electric meter's standby time, and the operation mode of this kind of intermittent type formula power supply can effectively reduce distribution lines no-load loss on satisfying the normal power consumption's of load basis to reach the target requirement that the line loss was administered.
Description
Technical Field
The application relates to the technical field of electrical engineering, in particular to an automatic switching device for a low-voltage user switch in a small-power high-loss transformer area.
Background
The electric roller shutter mode is generally adopted in agricultural greenhouse planting in Shang-Lang county in Wuwei City to reduce labor intensity and improve working efficiency, an electric roller shutter motor generally puts down a roller shutter at night to achieve the heat preservation effect, and the roller shutter is folded at sunrise to receive sunlight radiation. In addition, for example, some agricultural irrigation motor-pumped well platform district, mine platform district etc. all belong to little electric quantity high loss platform district.
All the 10kV111 Huamin line and the 10kV121 Huadong line 12 districts powered by Jing in Gulang county are mainly used for supplying power for greenhouse loads. Through on-site investigation, the main reasons for preliminarily analyzing the 12 platform area high loss problems are as follows: the main load of the distribution area is mainly the electric roller shutter of the greenhouse, the daily electric quantity is low, the long-term light load of the distribution area is caused, the no-load loss of the low-voltage distribution line is large, and the comprehensive line loss rate of the distribution area does not reach the standard. And through investigation, the main loss of the region comes from the intelligent electric meters in the region, and the loss of the intelligent electric meters accounts for 70% of the total loss of the region.
The low-power high-loss transformer area is the key point and the difficulty of line loss treatment. For such a transformer area, referring to fig. 1, a part of power supply enterprises consult with users, and switch off the control switch 2 and directly cut off the power supply of the transformer 1 side to the user side when the transformer area is out of the early and late power consumption of the greenhouse roller shutter motor as much as possible, so that the no-load loss of the low-voltage side of the transformer area and the standby loss of the electrical equipment are reduced. However, this method affects the electricity usage behavior and user habits of the user, and communication costs are high. Therefore, a solution is needed to reduce the loss of distribution lines without changing the customer's power demand and usage habits.
Disclosure of Invention
The technical problem to be solved by the application is to provide an automatic switching device for a low-voltage user switch in a low-power high-loss distribution area, which can effectively reduce the loss of a distribution line on the premise of not changing the power consumption requirements and power consumption habits of users.
In order to solve the above problem, the application provides a little electric quantity high loss platform district low pressure user switch automatic switching device, including transformer, control switch, smart electric meter, user side switch and the load of establishing ties, the device still includes: the system comprises a control switch, a user side switch, a bypass large resistor, a current sensing module and a processor, wherein the bypass large resistor is integrally connected with the control switch and the smart meter in parallel, the current sensing module is arranged between the smart meter and the user side switch, and the processor is connected with the control switch and the current sensing module; the processor is used for controlling the on-off of the control switch according to the sensing signal sent by the current sensing module and a preset instruction.
Preferably, the control switch is a magnetic latching relay.
Preferably, the device further comprises a power supply for supplying power to the magnetic latching relay.
Compared with the prior art, the method has the following advantages:
in this application, add bypass large resistance, electric current perception module and treater, through perception load state change, realized that control switch's automation is thrown and is moved back, reduce platform district user side smart electric meter's standby time, effectively reduce distribution lines no-load loss. The operation mode of intermittent power supply can effectively reduce the no-load loss of the distribution line on the basis of meeting the normal power consumption of the load, thereby achieving the target requirement of line loss treatment.
Drawings
The following describes embodiments of the present application in further detail with reference to the accompanying drawings.
Fig. 1 is a structural diagram of a low-voltage user side of a low-power high-loss distribution area in the prior art.
Fig. 2 is a schematic structural diagram of an automatic switching device of a low-voltage user switch in a low-power high-loss distribution room according to an embodiment of the present application.
In the figure: 1-transformer, 2-control switch, 3-smart electric meter, 4-user side switch, 5-load, 6-bypass large resistor, 7-current sensing module, and 8-processor.
Detailed Description
Referring to fig. 2, the embodiment of the present application provides an automatic switching device for a low-voltage user switch in a small-power high-loss transformer area, which includes a transformer 1, a control switch 2, a smart meter 3, a user-side switch 4, a load 5, a bypass large resistor 6, a current sensing module 7, and a processor 8, which are connected in series.
The bypass large resistor 6 is connected in parallel with the whole formed by the control switch 2 and the intelligent electric meter 3, and the bypass large resistor 6 is a large resistor of a K omega level. The current sensing module 7 is arranged between the intelligent electric meter 3 and the user side switch 4 and used for sensing current in a line, different sensing signals can be sent to the processor 8 under the two conditions of sensing the current and sensing no current, and the current sensing module 7 is a mature integrated module and can be purchased in the market. The control switch 2 may be embodied as a magnetic latching relay, which generally has a power supply for supplying power thereto.
The processor 8 is connected with the control switch 2 and the current sensing module 7, and is used for controlling the on-off of the control switch 2 according to the sensing signal sent by the current sensing module 7, specifically: when a current sensing signal is received, the processor 8 is triggered to work, the processor 8 closes the control switch 2, and power supply of the intelligent electric meter 3 and a user side is achieved; otherwise, the control switch 2 is turned off, and the power supply of the intelligent electric meter 3 and the user side is cut off.
The working principle is as follows:
under the initial state, the current sensing module 7 is in the low-power consumption dormant state, the control switch 2 is in the off state, the power supply of the intelligent electric meter 3 is cut off, the incoming line voltage is applied to the user load side through the bypass large resistor 6, and at the moment, if the user side switch 4 is switched off, the voltage cannot form a loop, so that the voltage drop at the two ends of the current sensing module 7 is 0, the current cannot be sensed, and the current sensing module 7 is always in the low-power consumption dormant state.
When the user side switch 4 is closed and the load 5 is connected, the voltage in the line forms a loop, due to the existence of the bypass large resistor 6, a small current can be generated in the line at the moment when the load 5 is connected, the current is collected by the current sensing module 7, meanwhile, the current sensing module 7 sends a sensing signal with the current to the processor 8, the sensing signal wakes up the processor 8 from a sleep state, the processor 8 closes the control switch 2, and due to the fact that the resistance of the main loop is very small (milliohm level), the load current is charged by the smart meter 3 of the main loop and then supplies power to the load 5.
When the user side switch 4 is turned off and the load 5 is completely removed, the voltage drop across the current sensing module 7 is 0, if the current sensing module 7 cannot collect current, a sensing signal without current is sent to the processor 8, and the processor 8 can turn off the control switch 2 after the set delay time (generally set 5 seconds delay time) is reached, so that the loop where the intelligent electric meter 3 is located is cut off from the line.
In addition, except when there is a demand for power (i.e. when the user-side switch 4 is closed) on the user side, in order not to affect the data acquisition and transmission functions of the smart electric meter 3, the processor 8 may close the control switch 2 according to a preset instruction, for example, in an idle and dormant state, an alarm timer is set inside the processor 8, when the alarm timer is triggered, the processor 8 may also be awakened to close the control switch 2, and power supply to the smart electric meter 3 is resumed, at this time, some predetermined operations may be performed, for example, work such as meter reading is completed in cooperation with a main loop of an existing collection system, so as to ensure normal electric energy metering, acquisition, and data uploading.
It should be noted that the present invention focuses on combining devices with specific functions, and as for the function implementation of the devices, such as the current sensing function of the current sensing module 7, the control of the control switch by the processor, etc., these are well known in the prior art or simple programs that can be implemented by using the existing program development platform and well known programming method, that is, the claimed technical solution of the present invention does not relate to the improvement of the method.
The technical solutions provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the structure and the core concept of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (3)
1. The utility model provides a little electric quantity high loss platform district low pressure user switch automatic switching device, includes transformer (1), control switch (2), smart electric meter (3), user side switch (4) and load (5) of establishing ties, its characterized in that, the device still includes: the bypass large resistor (6) is integrally connected with the control switch (2) and the intelligent electric meter (3) in parallel, the current sensing module (7) is arranged between the intelligent electric meter (3) and the user side switch (4), and the processor (8) is connected with the control switch (2) and the current sensing module (7); the processor (8) is used for controlling the on-off of the control switch (2) according to the sensing signal and the preset instruction sent by the current sensing module (7).
2. A device according to claim 1, characterized in that the control switch (2) is a magnetic latching relay.
3. The apparatus of claim 2, further comprising a power source for powering the magnetic latching relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222040814.0U CN218241709U (en) | 2022-08-04 | 2022-08-04 | Automatic switching device for low-voltage user switch in small-power high-loss transformer area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222040814.0U CN218241709U (en) | 2022-08-04 | 2022-08-04 | Automatic switching device for low-voltage user switch in small-power high-loss transformer area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218241709U true CN218241709U (en) | 2023-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222040814.0U Active CN218241709U (en) | 2022-08-04 | 2022-08-04 | Automatic switching device for low-voltage user switch in small-power high-loss transformer area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218241709U (en) |
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2022
- 2022-08-04 CN CN202222040814.0U patent/CN218241709U/en active Active
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Effective date of registration: 20231218 Address after: 730070 Shop, Room 001, Floor 1, No. 690, Wanxin South Road, Kongjiaya Street, Anning District, Lanzhou City, Gansu Province Patentee after: LANZHOU LONGNENG ELECTIC POWER SCIENCE & TECHNOLOGY Co.,Ltd. Address before: 730070 Wanxin North Road 249, Anning District, Lanzhou City, Gansu Province Patentee before: STATE GRID GASU ELECTRIC POWER Research Institute |