CN211908374U - Plug-and-play dynamic capacity increasing device for distribution transformer - Google Patents
Plug-and-play dynamic capacity increasing device for distribution transformer Download PDFInfo
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- CN211908374U CN211908374U CN202020952655.XU CN202020952655U CN211908374U CN 211908374 U CN211908374 U CN 211908374U CN 202020952655 U CN202020952655 U CN 202020952655U CN 211908374 U CN211908374 U CN 211908374U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
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Abstract
The utility model discloses a plug-and-play dynamic capacity increasing device for distribution transformer, which comprises an electric quantity collecting device, a main controller, a high-voltage switch, a low-voltage switch, a distribution transformer, a phase sequence protector and a communication device; the electric quantity acquisition device is connected to a low-voltage side main line of the distribution transformer of the platform area, and a secondary output line of the electric quantity acquisition device is connected with the input of the main controller; the high-voltage switch is connected with the high-voltage side of the distribution transformer and the high-voltage side of the transformer area distribution transformer, the low-voltage switch is connected with the low-voltage side of the distribution transformer and the low-voltage side of the transformer area distribution transformer, and the main controller is connected with the high-voltage switch and the control end of the low-voltage switch; the phase sequence protector is connected between the low-voltage side of the distribution transformer and the low-voltage switch in series and is also in communication connection with the main controller. The device is put into the transformer area when the transformer area is heavily overloaded, the load is shared, the safe and stable operation of the transformer area is guaranteed, the device is withdrawn when the transformer area is lightly loaded, the electric energy loss is reduced, and the economical efficiency of a power grid is improved. The device is plug-and-play, can be repeatedly used and has good flexibility.
Description
Technical Field
The utility model relates to an intelligent power distribution technical field especially relates to a join in marriage change and insert instant dynamic increase-volume device.
Background
Along with economic development and social progress of China, the electricity consumption of industrial and agricultural production and civil use is also rising year by year, the electricity demand is in a diversified trend, and the power supply requirement for the power department is higher and higher. In many rural power grid areas covered by national grid companies, the guarantee of power supply remains a significant problem due to the weakness of the local grid structure. Particularly, the annual power utilization load rate is low, the peak power utilization is time-interval or seasonal, the peak load is prominent in a specific period, distribution transformer overload is often caused, even a transformer is burnt out, and the power supply reliability cannot be guaranteed. At present, the transformer is increased by replacing a large transformer or splitting a transformer area, so that the load rate of the transformer area is in a light load state for a long time, the line loss is increased, the capacity is idle, and the economic benefit is low. Therefore, there is a need for a device that can be flexibly switched on and off to share the transformer load when the transformer is heavily overloaded.
SUMMERY OF THE UTILITY MODEL
The utility model provides a join in marriage and become plug-and-play developments increase capacity device for solve the distribution station district and join in marriage the problem that becomes seasonal overload, all year long term overload, join in marriage the heavy overload of change in the station district, share load, guarantee the station district and join in marriage the safety and stability operation of changing, improve the reliability of power supply.
A plug-and-play dynamic capacity increasing device for distribution transformer comprises an electric quantity collecting device, a main controller, a high-voltage switch, a low-voltage switch, a distribution transformer, a phase sequence protector and a communication device;
the electric quantity acquisition device is connected to a low-voltage side main line of a distribution transformer of the transformer area, and a secondary output line of the electric quantity acquisition device is connected with the input of the main controller; the high-voltage switch is connected between the high-voltage side of the distribution transformer and the high-voltage side of the transformer area distribution transformer in series, the low-voltage switch is connected between the low-voltage side of the distribution transformer and the low-voltage side of the transformer area distribution transformer in series, and the main controller is in communication connection with the high-voltage switch and the control end of the low-voltage switch; the phase sequence protector is connected between the low-voltage side of the distribution transformer and the low-voltage switch in series, and is also in communication connection with the main controller; the communication device is in communication connection with the main controller.
During work, the low-voltage side load voltage and current of the transformer substation area distribution are collected through the electric quantity collecting device and transmitted to the main controller, and the main controller calculates the transformer substation area distribution load rate based on the low-voltage side load voltage and current of the transformer substation area distribution. When the distribution transformer load rate of the transformer area is greater than a first preset value stored in the main controller, namely, when the distribution transformer load is overloaded, the main controller firstly sends a closing instruction to the control end of the high-voltage switch to control the high-voltage switch to be closed, and sends a closing instruction to the control end of the low-voltage switch to control the low-voltage switch to be closed after delaying a preset time, so that the input of the dynamic capacity increasing device is realized, the load is shared, the stable operation of the distribution transformer area is guaranteed, and the power supply reliability is improved. When the high-voltage switch and the low-voltage switch are in a closed state and the distribution and transformation load rate of the transformer area is smaller than a second preset value stored in the main controller, namely the power utilization peak of the transformer area is passed, the distribution and transformation load of the transformer area is recovered to be normal, at the moment, the main controller firstly sends a disconnection instruction to the control end of the low-voltage switch to control the disconnection of the low-voltage switch, and then sends a disconnection instruction to the control end of the high-voltage switch to control the disconnection of the high-voltage switch after delaying for a preset time, so that the dynamic capacity increasing device is withdrawn.
Further, the electric quantity acquisition device comprises a voltage transformer and a current transformer, wherein the voltage transformer and the current transformer are connected to a low-voltage side main line of the distribution transformer of the transformer area, and secondary output lines of the voltage transformer and the current transformer are connected with the input of the main controller. The voltage transformer is used for detecting the low-voltage side load voltage of the transformer area distribution transformer and transmitting the low-voltage side load voltage to the main controller, and the current transformer is used for detecting the low-voltage side load current of the transformer area distribution transformer and transmitting the low-voltage side load current to the main controller.
Further, the high-voltage switch is a contactor.
Further, the low-voltage switch is a contactor.
Furthermore, the phase sequence protector is a phase sequence relay and is used for detecting the phase sequence of the low-voltage side of the distribution transformer, the detection result is sent to the main controller, and if the phase sequences at the two ends of the phase sequence protector do not accord with each other, the output relay of the phase sequence protector cannot be switched on, so that the protection effect is achieved, and the accident is avoided being sent.
Further, the communication device is a 4G router and is used for realizing 4G wireless communication between the main controller and the outside.
Further, the communication device is in communication connection with the main controller through Ethernet.
Advantageous effects
The utility model provides a distribution transformer plug-and-play dynamic capacity increasing device, which collects the low-voltage side load voltage and current of a distribution transformer area through a power collecting device and transmits the low-voltage side load voltage and current to a main controller, and the main controller calculates the distribution transformer load rate of the distribution transformer area based on the low-voltage side load voltage and current of the distribution transformer area; when the distribution transformer load rate of the transformer area is greater than a first preset value stored in the main controller, namely, when the distribution transformer weight of the transformer area is overloaded, the main controller firstly controls the high-voltage switch to be closed, and controls the low-voltage switch to be closed after delaying a preset time, so that the input of the dynamic capacity increasing device is realized; when the high-voltage switch and the low-voltage switch are in a closed state and the distribution transformer load rate of the transformer area is smaller than a second preset value stored in the main controller, namely the distribution transformer load of the transformer area recovers light load, the main controller firstly controls the low-voltage switch to be switched off, and then controls the high-voltage switch to be switched off after delaying preset time, so that the dynamic capacity increasing device can be withdrawn. The dynamic capacity increasing device is put into the transformer area to share the load when the transformer area is heavily overloaded, so that the safe and stable operation of the transformer area is ensured, the dynamic capacity increasing device is quitted when the transformer area is lightly loaded, the electric energy loss is reduced, and the economy of a power grid is improved. The dynamic capacity increasing device is plug-and-play, can be repeatedly used and has good flexibility.
Drawings
Fig. 1 is a schematic structural diagram of a plug-and-play dynamic capacity increasing device for distribution and transformation provided by an embodiment of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the present embodiment provides a plug-and-play dynamic capacity increasing device for distribution transformer, which includes an electric quantity collecting device 3, a main controller 2, a high-voltage switch 4, a low-voltage switch 6, a distribution transformer 1, a phase sequence protector 5, and a communication device 7;
the electric quantity acquisition device 3 is connected to a low-voltage side main line of a distribution transformer of a transformer area, and a secondary output line of the electric quantity acquisition device 3 is connected with the input of the main controller 2; the high-voltage switch 4 is connected in series between the high-voltage side of the distribution transformer 1 and the high-voltage side of the transformer area, the low-voltage switch 6 is connected in series between the low-voltage side of the distribution transformer 1 and the low-voltage side of the transformer area, and the main controller 2 is in communication connection with the high-voltage switch 4 and the control end of the low-voltage switch 6; the phase sequence protector 5 is connected in series between the low-voltage side of the distribution transformer 1 and the low-voltage switch 6, and the phase sequence protector 5 is also in communication connection with the main controller 2; the communication device 7 is connected in communication with the main controller 2.
During work, the low-voltage side load voltage and current of the transformer substation are collected through the electric quantity collecting device 3 and transmitted to the main controller 2, and the main controller 2 calculates the transformer substation load rate based on the low-voltage side load voltage and current of the transformer substation. When the distribution transformer load rate of the transformer station is greater than a first preset value (such as 0.9 times of the distribution transformer rated capacity) stored in the main controller 2, namely, when the distribution transformer station is overloaded, the main controller 2 firstly sends a closing instruction to the control end of the high-voltage switch 4 to control the high-voltage switch 4 to be closed, and sends a closing instruction to the control end of the low-voltage switch 6 to control the low-voltage switch 6 to be closed after delaying a preset time, so that the input of the dynamic capacity increasing device is realized, the load is shared, the stable operation of the distribution transformer station is guaranteed, and the power supply reliability is improved. When the high-voltage switch 4 and the low-voltage switch 6 are in a closed state and the distribution and transformation load rate of the transformer substation is smaller than a second preset value (such as 0.6 times of the distribution and transformation rated capacity of the transformer substation) stored in the main controller 2, namely the power consumption peak of the transformer substation passes, and the distribution and transformation load of the transformer substation returns to normal, at this time, the main controller 5 firstly sends a disconnection instruction to the control end of the low-voltage switch 6 to control the disconnection of the low-voltage switch 6, and then sends a disconnection instruction to the control end of the high-voltage switch 4 to control the disconnection of the high-voltage switch 4 after delaying for a preset time length, so that the dynamic capacity increasing.
Specifically, the electric quantity acquisition device 3 includes voltage transformer and current transformer, voltage transformer and current transformer all connect on the low pressure side main line of transformer is joined in marriage in the platform district, voltage transformer and current transformer's secondary output line all with main control unit 2's input connection. The voltage transformer is used for detecting the low-voltage side load voltage of the transformer area distribution transformer and transmitting the low-voltage side load voltage to the main controller 2, and the current transformer is used for detecting the low-voltage side load current of the transformer area distribution transformer and transmitting the low-voltage side load current to the main controller 2.
In specific implementation, the high-voltage switch 4 and the low-voltage switch 6 both adopt contactors; the phase sequence protector 5 selects a phase sequence relay for detecting the phase sequence of the low-voltage side of the distribution transformer 1, and simultaneously sends a detection result to the main controller 2, if the phase sequences at the two ends of the phase sequence protector 5 do not accord with each other, the output relay of the phase sequence protector 5 cannot be switched on, so that a protection effect is achieved, and accidents are avoided, and meanwhile, when the main controller 2 receives a phase sequence error signal sent by the phase sequence protector 5, an alarm signal is sent out, and the control of the high-voltage switch 4 and the low-voltage switch 6 is stopped; the communication device 7 is a 4G router, is in communication connection with the main controller 2 through Ethernet, and is used for realizing 4G wireless communication between the main controller 2 and the outside, realizing wireless communication between the main controller 2 and a remote monitoring platform, and realizing remote monitoring and control; the main controller 2 adopts an embedded microprocessor to obtain the voltage and current values collected by the electric quantity collecting device 3, compares the voltage and current values with preset values, and controls the high-voltage switch 4 and the low-voltage switch 6 to be switched on and off according to the states of the switch and the phase sequence protector.
The utility model provides a join in marriage change plug and play developments increase-volume device and control method can join in marriage the heavy weight of transformer and overload in platform district and drop into, share the load, have ensured the safe and stable operation of platform district distribution change, withdraw from when the platform district distribution becomes underload, reduce the power consumption, improve the economic nature of electric wire netting. The device is plug-and-play, can be repeatedly used and has good flexibility.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A plug-and-play dynamic capacity increasing device for distribution transformer is characterized by comprising an electric quantity acquisition device, a main controller, a high-voltage switch, a low-voltage switch, a distribution transformer, a phase sequence protector and a communication device;
the electric quantity acquisition device is connected to a low-voltage side main line of a distribution transformer of the transformer area, and a secondary output line of the electric quantity acquisition device is connected with the input of the main controller; the high-voltage switch is connected between the high-voltage side of the distribution transformer and the high-voltage side of the transformer area distribution transformer in series, the low-voltage switch is connected between the low-voltage side of the distribution transformer and the low-voltage side of the transformer area distribution transformer in series, and the main controller is in communication connection with the high-voltage switch and the control end of the low-voltage switch; the phase sequence protector is connected between the low-voltage side of the distribution transformer and the low-voltage switch in series, and is also in communication connection with the main controller; the communication device is in communication connection with the main controller.
2. The distribution transformer plug-and-play dynamic capacity increasing device according to claim 1, wherein the electric quantity collecting device comprises a voltage transformer and a current transformer, the voltage transformer and the current transformer are both connected to a low-voltage side main line of a distribution transformer of a transformer area, and secondary output lines of the voltage transformer and the current transformer are both connected with an input of the main controller.
3. The distribution plug and play dynamic capacity extender of claim 1, wherein the high voltage switch is a contactor.
4. The distribution plug and play dynamic compatibilization device according to claim 1, wherein the low voltage switch is a contactor.
5. The distribution plug and play dynamic capacity increasing device according to claim 1, wherein the phase sequence protector is a phase sequence relay.
6. The distribution plug and play dynamic capacity increasing device according to claim 1, wherein the communication device is a 4G router.
7. The distribution plug and play dynamic capacity increasing device according to claim 6, wherein the communication device is communicatively connected with the main controller via Ethernet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020952655.XU CN211908374U (en) | 2020-05-29 | 2020-05-29 | Plug-and-play dynamic capacity increasing device for distribution transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020952655.XU CN211908374U (en) | 2020-05-29 | 2020-05-29 | Plug-and-play dynamic capacity increasing device for distribution transformer |
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| Publication Number | Publication Date |
|---|---|
| CN211908374U true CN211908374U (en) | 2020-11-10 |
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| CN202020952655.XU Active CN211908374U (en) | 2020-05-29 | 2020-05-29 | Plug-and-play dynamic capacity increasing device for distribution transformer |
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| CN (1) | CN211908374U (en) |
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2020
- 2020-05-29 CN CN202020952655.XU patent/CN211908374U/en active Active
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