CN210183015U - Synchronous switching controller - Google Patents
Synchronous switching controller Download PDFInfo
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- CN210183015U CN210183015U CN201921042735.5U CN201921042735U CN210183015U CN 210183015 U CN210183015 U CN 210183015U CN 201921042735 U CN201921042735 U CN 201921042735U CN 210183015 U CN210183015 U CN 210183015U
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 16
- 230000010365 information processing Effects 0.000 claims abstract description 49
- 238000004364 calculation method Methods 0.000 claims abstract description 46
- 238000005070 sampling Methods 0.000 claims abstract description 42
- 238000002955 isolation Methods 0.000 claims abstract description 14
- 239000003990 capacitor Substances 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 13
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model discloses a synchronous switching controller, include: the power grid sampling unit can be connected with a power grid to acquire power grid working information; the information processing unit is connected with the power grid sampling unit; the information processing unit is connected with the calculation control unit; and the calculation control unit can be connected with an external switching switch through the isolation unit, and calculates switching time according to the power grid working information so as to control the external switching switch to work. Through the mutually independent structure of the information processing unit and the calculation control unit, the function division is more clear, the switching time can be calculated quickly and accurately, meanwhile, the calculation control unit is connected with an external switching switch through an isolation unit, the isolation unit isolates the calculation control unit from the external switching switch, the external switching switch can be prevented from being mistakenly operated due to interference signals, and the reliability is improved.
Description
Technical Field
The utility model relates to a power grid reactive compensation field especially relates to reactive compensation controller.
Background
With the development of economic technology, the electricity consumption is rapidly increased, and particularly in the field of production and manufacturing, high-power equipment is more and more, and the impact of frequently started high-power equipment on a power grid is large, so that the problems of poor power supply quality and low power factor of the power grid are caused. In contrast, a switching capacitor needs to be switched in the power grid through a switching switch in a reactive compensation mode, so that the power factor of the power grid is improved, and the power supply quality is improved, so that reactive compensation is an important component of a power supply system.
In the prior art, in order to reduce surge generated during switching, a controller switches capacitors, collects and calculates switching time according to work information of a power grid and controls the on and off of a switching switch at the switching time, however, a common controller only uses a single chip to simultaneously perform information collection processing and calculation control, so that the calculation speed is low and the precision is not high, and although some controllers use separate calculation control chips, the calculation control chips are easily interfered when the calculation control chips control the switching switch, and misoperation of the switching switch is caused.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a synchronous switching controller, it can be accurate calculate the switching constantly fast to can prevent the fling-cut switch malfunction.
The utility model provides a technical scheme that its technical problem provided is: synchronous switching controller includes:
the power grid sampling unit can be connected with a power grid to acquire power grid working information;
the information processing unit is connected with the power grid sampling unit;
the information processing unit is connected with the calculation control unit;
and the calculation control unit can be connected with an external switching switch through the isolation unit, and calculates switching time according to the power grid working information so as to control the external switching switch to work.
Preferably, the device further comprises a switching switch presetting unit, the switching switch presetting unit can be provided with an off-time value of an external switching switch, and the calculation control unit is connected with the switching switch presetting unit.
Preferably, the system further comprises a parameter control unit, wherein the parameter control unit is connected with the information processing unit to set working parameters of the information processing unit.
Preferably, the power grid system further comprises a storage unit, and the information processing unit is connected with the storage unit to convert the power grid working information into power grid data for storage.
Preferably, the system further comprises a communication unit capable of communicating with an external client, and the information processing unit is connected with the communication unit.
Preferably, the mobile terminal further comprises a display unit, and the information processing unit is connected with the display unit.
Preferably, the isolation unit comprises a photocoupler U39, a switching tube Q1 and a resistor R6;
the anode of a luminescent part in the photoelectric coupler U39 is connected with an external power supply, and the cathode of the luminescent part in the photoelectric coupler U39 is connected with the calculation control unit;
a collector of a light-receiving element in the photoelectric coupler U39 is connected with an external power supply, and an emitter of the light-receiving element in the photoelectric coupler U39 is respectively connected with one end of the resistor R6 and a control end of the switch tube Q1;
the input end of the switch tube Q1 is connected with an external fling-cut switch, and the output end of the switch tube Q1 and the other end of the resistor R6 are grounded.
Preferably, the grid sampling unit comprises a voltage sampling unit and/or a current sampling unit, and the voltage sampling unit and/or the current sampling unit are connected with the information processing unit and/or the calculation control unit.
Preferably, the voltage sampling unit comprises a current limiting resistor R56, a photoelectric coupler U31, a resistor R56 and a capacitor;
the anode of a luminescent element in the photoelectric coupler U31 is connected with an external power grid through a current-limiting resistor R56, and the cathode of the luminescent element in the photoelectric coupler U31 is grounded;
the collector of the light-receiving part in the photoelectric coupler U31 is respectively connected with one end of a resistor R56, one end of the information processing unit and one end of a capacitor, and the emitter of the light-receiving part in the photoelectric coupler U31 and the other end of the capacitor are grounded;
the other end of the resistor R56 is connected with an external power supply.
Preferably, the current sampling unit comprises a current transformer, a resistor RIa1 and an operational amplifier; the primary side of the current transformer is connected with an external power grid, one end of the secondary side of the current transformer is respectively connected with one input end of the operational amplifier and one end of the resistor RIa1, the other end of the secondary side of the current transformer is connected with the other input end of the operational amplifier, and the output end of the operational amplifier is respectively connected with the other end of the resistor RIa1 and the information processing unit.
The utility model has the advantages that: the information processing unit obtains power grid working information from the power grid sampling unit to judge whether capacitance switching is needed, when the capacitance switching is needed, the calculation control unit calculates switching time according to the power grid working information, and controls the action of an external switching switch to switch the capacitance at the time.
Drawings
The invention will be further described with reference to the following figures and examples:
FIG. 1 is a block diagram of one embodiment of the present invention;
fig. 2 is a circuit diagram of the isolation unit of the present invention;
FIG. 3 is a circuit diagram of the voltage sampling unit of the present invention;
FIG. 4 is a circuit diagram of the current sampling unit of the present invention;
fig. 5 is a circuit diagram of the communication unit of the present invention;
fig. 6 is a circuit diagram of the parameter control unit of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
Referring to fig. 1, the utility model provides a synchronous switching controller, include:
the power grid sampling unit 10 can be connected with a power grid to acquire power grid working information;
the information processing unit 50 is connected with the power grid sampling unit 10;
a calculation control unit 30, the information processing unit 50 being connected to the calculation control unit 30;
and the calculation control unit 30 can be connected with an external switching switch through the isolation unit 40, and the calculation control unit 30 calculates switching time according to the power grid working information to control the external switching switch to work.
The information processing unit 50 obtains the power grid working information from the power grid sampling unit 10 to judge whether capacitance switching is needed, when the capacitance switching is needed, the calculation control unit 30 calculates the moment of capacitance switching according to the power grid working information, and controls the external switching to operate to switch the capacitance at the moment, and through the mutually independent structure of the information processing unit 50 and the calculation control unit 30, the function division is more clear, and the switching moment can be calculated quickly and accurately. Meanwhile, the calculation control unit 30 is connected with an external fling-cut switch through the isolation unit 40, and the isolation unit 40 isolates the calculation control unit 30 from the external fling-cut switch, so that the false action of the external fling-cut switch caused by interference signals can be prevented, and the reliability is improved.
The information processing unit 50 can obtain a power factor value according to the power grid working information, compares the power factor value with a set threshold value to judge whether to put in or cut off the capacitor, and transmits a switching signal to the calculation control unit, wherein the information processing unit 50 can be a device or equipment such as a microcontroller. When receiving the switching signal of the information processing unit 50, the calculation control unit 30 obtains the switching signal from the information processing unit 50 and calculates the voltage zero-crossing or current zero-crossing time, i.e., the switching time, according to the power grid working information, so as to put in the capacitor at the voltage zero-crossing time, and cut off the capacitor at the current zero-crossing time, the calculation control unit 30 calculates the switching time and controls the external switching switch to operate at the time, and the calculation control unit 30 may be a device capable of performing fast calculation, such as a DSP chip. When the calculation control unit 30 is a DSP chip and the power grid operation information acquired by the power grid sampling unit 10 is an analog signal, the information processing unit 50 needs to convert the power grid operation information into a digital signal and transmit the digital signal to the DSP chip.
Referring to fig. 1, in order to calculate the switching time more accurately, the switching device further includes a switching switch presetting unit 20, the switching switch presetting unit 20 can set and store an off-time value of an external switching switch, and the calculation control unit 30 is connected to the switching switch presetting unit 20.
The on-off action of the fling-cut switch requires time, namely off-time, the off-time value of the fling-cut switch is set and stored through the fling-cut switch presetting unit 20 and is transmitted to the calculation control unit 30, so that the calculation control unit 30 calculates the off-time of the fling-cut switch, the fling-cut time can be calculated more accurately, and the surge generated by the fling-cut capacitor is smaller. The fling-cut switch presetting unit 20 can be an implementation mode that a key circuit is matched with a latch, and a user sets the off-time value of the fling-cut switch through a key and stores the off-time value through the latch.
Referring to fig. 1 and 6, a parameter handling unit 60 is further included, and the parameter handling unit 60 is connected to the information processing unit 50 to set an operating parameter of the information processing unit 50. The user sets the operating parameters of the information processing unit 50, such as the set threshold of the power factor, through the parameter control unit 60.
Referring to fig. 1, in order to record the change of the operating state of the power grid, a storage unit 70 is further included, and the information processing unit 50 is connected to the storage unit 70 to convert the power grid operating information into power grid data for storage. The stored power grid data can facilitate a user to know the working change process of the power grid so as to master the power grid condition and facilitate the work such as maintenance and the like. The storage unit 70 may be an SD card, a RAM, or the like.
Referring to fig. 1 and 5, a communication unit 80 is further included, the communication unit 80 being capable of communicating with an external client, and the information processing unit 50 being connected to the communication unit 80. The information processing unit 50 communicates with an external client through the communication unit 80, and can transmit data such as power grid working information and power factors to the external client in real time, and the external client can also set working parameters of the information processing unit 50 remotely, so that convenience is improved. The communication unit 80 may be a circuit or a device such as an RS485 communication module.
Referring to fig. 1, as a preferred embodiment, the system further includes a display unit 90, and the information processing unit 50 is connected to the display unit 90. The information processing unit 50 can display the power grid working information, the power factor value, the fling-cut switch off-time value and other data through the display unit 90, so that a user can visually know the values and the use is convenient. The information processing unit 50 may be a display screen, a nixie tube, or the like.
Referring to fig. 2, as a preferred embodiment of the isolation unit 40, the isolation unit 40 includes a photo coupler U39, a switching tube Q1, and a resistor R6; the anode of the luminescent element in the photoelectric coupler U39 is connected with an external power supply, and the cathode of the luminescent element in the photoelectric coupler U39 is connected with the calculation control unit 30; a collector of a light-receiving element in the photoelectric coupler U39 is connected with an external power supply, and an emitter of the light-receiving element in the photoelectric coupler U39 is respectively connected with one end of the resistor R6 and a control end of the switch tube Q1; the input end of the switch tube Q1 is connected with an external fling-cut switch, and the output end of the switch tube Q1 and the other end of the resistor R6 are grounded.
When the photoelectric coupler works, the calculation control unit 30 outputs low level, the light emitting element in the photoelectric coupler U39 is conducted to emit light, the light receiving element in the photoelectric coupler U39 is conducted to output current, the current flows through the resistor R6 to form voltage drop, and the switching tube Q1 is enabled to cut off the flowing current to be small; on the contrary, when the calculation control unit 30 outputs a high level, the switching tube Q1 is turned on and has a large current, and since the input end of the switching tube Q1 is connected with the external on-off switch, the external on-off switch can be controlled by the current. The photoelectric coupler U39 can isolate the calculation control unit 30 from an external fling-cut switch, so that the phenomenon that the fling-cut switch acts mistakenly due to interference signals is avoided, and the photoelectric coupler U39 can increase the driving capability of the calculation control unit 30 to drive the switching tube Q1 to be conducted. The switching tube Q1 may be a MOS tube or the like.
Referring to fig. 1, the grid sampling unit 10 includes a voltage sampling unit and/or a current sampling unit, and the voltage sampling unit and/or the current sampling unit are connected to the information processing unit 50 and/or the calculation control unit 30. As a most preferred embodiment, the grid sampling unit 10 includes both a voltage sampling unit and a current sampling unit, so as to be able to obtain more operation information of the grid.
Referring to fig. 3, as a preferred embodiment of the voltage sampling unit, the voltage sampling unit includes a current limiting resistor R56, a photo coupler U31, a resistor R56, and a capacitor; the anode of a luminescent element in the photoelectric coupler U31 is connected with an external power grid through a current-limiting resistor R56, and the cathode of the luminescent element in the photoelectric coupler U31 is grounded; the collector of the light-receiving part in the photoelectric coupler U31 is respectively connected with one end of a resistor R56, the information processing unit 50 and one end of a capacitor, and the emitter of the light-receiving part in the photoelectric coupler U31 and the other end of the capacitor are grounded; the other end of the resistor R56 is connected with an external power supply.
Sampling is carried out on the power grid voltage through the photoelectric coupler U31, the power grid and the information processing unit 50 can be isolated, interference influence is reduced, and the voltage sampling result obtained by the information processing unit 50 is more accurate.
Referring to fig. 4, as a preferred embodiment of the current sampling unit, the current sampling unit includes a current transformer, a resistor RIa1, and an operational amplifier; the primary side of the current transformer is connected to an external power grid, one end of the secondary side of the current transformer is connected to one input end of the operational amplifier and one end of the resistor RIa1, respectively, the other end of the secondary side of the current transformer is connected to the other input end of the operational amplifier, and the output end of the operational amplifier is connected to the other end of the resistor RIa1 and the information processing unit 50, respectively.
The current of the power grid is sampled through the current transformer, and then the current is amplified through a reverse proportion amplifying circuit formed by the operational amplifier, so that the voltage sampling result obtained by the information processing unit 50 is more accurate.
The above embodiments are merely preferred embodiments of the present invention, and other embodiments are also possible. Equivalent modifications or substitutions may be made by those skilled in the art without departing from the spirit of the invention, and such equivalent modifications or substitutions are intended to be included within the scope of the claims set forth herein.
Claims (10)
1. Synchronous switching controller, its characterized in that includes:
the power grid sampling unit (10) can be connected with a power grid to acquire power grid working information;
the information processing unit (50) is connected with the power grid sampling unit (10);
a calculation control unit (30), the information processing unit (50) being connected to the calculation control unit (30);
the isolation unit (40), the calculation control unit (30) can be connected with an external switching switch through the isolation unit (40), and the calculation control unit (30) calculates switching time according to the power grid work information so as to control the external switching switch to work.
2. The synchronous switching controller of claim 1, wherein: still include that the fling-cut switch predetermines unit (20), fling-cut switch predetermines unit (20) and can be provided with the off-time value of outside fling-cut switch, calculation control unit (30) with fling-cut switch predetermines unit (20) and is connected.
3. The synchronous switching controller of claim 1, wherein: the device also comprises a parameter control unit (60), wherein the parameter control unit (60) is connected with the information processing unit (50) to set working parameters of the information processing unit (50).
4. The synchronous switching controller of claim 1, wherein: the power grid monitoring system further comprises a storage unit (70), wherein the information processing unit (50) is connected with the storage unit (70) so as to convert the power grid working information into power grid data to be stored.
5. The synchronous switching controller of claim 1, wherein: the client-side communication system further comprises a communication unit (80), the communication unit (80) can communicate with an external client side, and the information processing unit (50) is connected with the communication unit (80).
6. The synchronous switching controller according to any one of claims 1 to 5, characterized in that: the system also comprises a display unit (90), and the information processing unit (50) is connected with the display unit (90).
7. The synchronous switching controller of claim 1, wherein: the isolation unit (40) comprises a photoelectric coupler U39, a switching tube Q1 and a resistor R6;
the anode of a luminescent part in the photoelectric coupler U39 is connected with an external power supply, and the cathode of the luminescent part in the photoelectric coupler U39 is connected with the calculation control unit (30);
a collector of a light-receiving element in the photoelectric coupler U39 is connected with an external power supply, and an emitter of the light-receiving element in the photoelectric coupler U39 is respectively connected with one end of the resistor R6 and a control end of the switch tube Q1;
the input end of the switch tube Q1 is connected with an external fling-cut switch, and the output end of the switch tube Q1 and the other end of the resistor R6 are grounded.
8. The synchronous switching controller of claim 1, wherein: the power grid sampling unit (10) comprises a voltage sampling unit and/or a current sampling unit, and the voltage sampling unit and/or the current sampling unit are connected with the information processing unit (50) and/or the calculation control unit (30).
9. The synchronous switching controller of claim 8, wherein: the voltage sampling unit comprises a current-limiting resistor R56, a photoelectric coupler U31, a resistor R56 and a capacitor;
the anode of a luminescent element in the photoelectric coupler U31 is connected with an external power grid through a current-limiting resistor R56, and the cathode of the luminescent element in the photoelectric coupler U31 is grounded;
the collector of the light-receiving part in the photoelectric coupler U31 is respectively connected with one end of a resistor R56, the information processing unit (50) and one end of a capacitor, and the emitter of the light-receiving part in the photoelectric coupler U31 and the other end of the capacitor are grounded;
the other end of the resistor R56 is connected with an external power supply.
10. The synchronous switching controller of claim 8, wherein: the current sampling unit comprises a current transformer, a resistor RIA1 and an operational amplifier; the primary side of the current transformer is connected with an external power grid, one end of the secondary side of the current transformer is respectively connected with one input end of the operational amplifier and one end of the resistor RIA1, the other end of the secondary side of the current transformer is connected with the other input end of the operational amplifier, and the output end of the operational amplifier is respectively connected with the other end of the resistor RIA1 and the information processing unit (50).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921042735.5U CN210183015U (en) | 2019-07-04 | 2019-07-04 | Synchronous switching controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921042735.5U CN210183015U (en) | 2019-07-04 | 2019-07-04 | Synchronous switching controller |
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| CN210183015U true CN210183015U (en) | 2020-03-24 |
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| CN201921042735.5U Active CN210183015U (en) | 2019-07-04 | 2019-07-04 | Synchronous switching controller |
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| CN (1) | CN210183015U (en) |
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- 2019-07-04 CN CN201921042735.5U patent/CN210183015U/en active Active
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Effective date of registration: 20231220 Address after: 528400 First Floor, Building 1, Jinli Park, No. 15 Minke East Road, Shiqi District, Zhongshan City, Guangdong Province Patentee after: Guangdong Zhongyi Electrical Equipment Co.,Ltd. Address before: 528421 No. 8, muhejing 3rd Street, Ganggang Town, Zhongshan City, Guangdong Province Patentee before: ZHONGSHAN KAIFENG ELECTRICAL POWER TECHNOLOGY Co.,Ltd. |