CN210325492U - On-load voltage regulation driving switch circuit and three-phase transformer using same - Google Patents
On-load voltage regulation driving switch circuit and three-phase transformer using same Download PDFInfo
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- CN210325492U CN210325492U CN201921622701.3U CN201921622701U CN210325492U CN 210325492 U CN210325492 U CN 210325492U CN 201921622701 U CN201921622701 U CN 201921622701U CN 210325492 U CN210325492 U CN 210325492U
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Abstract
The utility model belongs to the technical field of three-phase transformer on-load voltage regulation, especially, relate to an on-load voltage regulation drive switch circuit and applied this switch circuit's three-phase transformer. The on-load voltage regulation driving switch circuit can realize on-load voltage regulation of the three-phase transformer, has the advantages of rapid response, high regulation speed, no electric arc switching and the like, and can provide help for improving the stability of the output voltage of the power distribution system and the quality of the output electric energy. On-load voltage regulation drive switch circuit, including: a first optical coupler, a second optical coupler; the first optical coupler consists of a first light emitting diode and a first phototriode, and the second optical coupler consists of a second light emitting diode and a second phototriode; the first light emitting diode is used for receiving a first driving control signal; the second light emitting diode is used for receiving a second driving control signal; a comparison amplifier; the IGBT driving device comprises a first IGBT driving module, a second IGBT driving module and a third IGBT driving module.
Description
Technical Field
The invention belongs to the technical field of on-load voltage regulation of three-phase transformers, and particularly relates to an on-load voltage regulation driving switch circuit and a three-phase transformer using the same.
Background
In order to adapt to the rapid development of national economy and the continuously improved living standard of people, the improvement of the voltage quality and the reliability of a power distribution network is an irresistible and urgent technical problem to be solved. As the most effective mode for stabilizing the voltage of the power grid, the on-load voltage regulation three-phase transformer carries an automatic voltage regulation tapping switch to realize the purpose of automatically changing a tapping point at one side of the three-phase transformer according to the output voltage of the three-phase transformer so as to finally realize secondary regulation of the output voltage. However, the inventor finds that the conventional on-load tap changer has the defects of switching arc, slow action response and the like, can generate impact and electromagnetic interference on three-phase transformer equipment, and is not beneficial to improving the stability of the output voltage of a power distribution system and improving the quality of output electric energy.
Disclosure of Invention
The on-load voltage regulation driving switch circuit can realize on-load voltage regulation of the three-phase transformer, has the advantages of rapid response, high regulation speed, no electric arc switching and the like, and can provide help for improving the stability of output voltage of a power distribution system and the quality of output electric energy.
In order to solve the technical problems, the invention adopts the following technical scheme:
on-load voltage regulation drive switch circuit, including:
a first optical coupler, a second optical coupler; the first optical coupler consists of a first light emitting diode and a first phototriode, and the second optical coupler consists of a second light emitting diode and a second phototriode; the first light-emitting diode is used for receiving a first driving control signal, the control extreme end of the first phototriode is adjacent to the light-emitting side of the first light-emitting diode, and the input extreme end of the first phototriode is connected with the positive electrode of the power supply; the second light-emitting diode is used for receiving a second driving control signal, the control extreme end of the second phototriode is adjacent to the light-emitting side of the second light-emitting diode, and the input extreme end of the second phototriode is connected with the positive electrode of the power supply;
a comparison amplifier; the output pole end of the first phototriode is connected with the first input end of the comparison amplifier, and the output pole end of the second phototriode is connected with the second input end of the comparison amplifier;
the IGBT driving device comprises a first IGBT driving module, a second IGBT driving module and a third IGBT driving module; the output end of the comparison amplifier is respectively connected with the grid end of the first IGBT driving module and the grid end of the second IGBT driving module; the source terminal of the first IGBT driving module is connected with the positive electrode of a power supply, the drain terminal of the first IGBT driving module is connected with the source terminal of the second IGBT driving module, and the drain terminal of the second IGBT driving module is connected with the negative electrode of the power supply; the grid terminal of the third IGBT driving module is respectively connected with the drain terminal of the first IGBT driving module and the source terminal of the second IGBT driving module; the source terminal of the third IGBT driving module is connected with the positive electrode of the power supply; and the drain end of the third IGBT driving module is connected with the negative pole of the power supply.
Further preferably, the method further comprises the following steps: the current limiting resistor is arranged on the output side of the positive electrode of the power supply; the resistance value of the current limiting resistor is 4.4k omega.
Further preferably, the method further comprises the following steps: the first anti-shock diode is arranged between the input pole end of the first phototriode and the positive pole of the power supply, and the second anti-shock diode is arranged between the input pole end of the second phototriode and the positive pole of the power supply;
the positive end of the first anti-impact diode is connected with the positive electrode of the power supply, and the negative end of the first anti-impact diode is connected with the input end of the first phototriode; the positive end of the second anti-impact diode is connected with the negative end of the first anti-impact diode, and the negative end of the second anti-impact diode is connected with the input end of the second phototriode.
Optionally, an overvoltage protection resistor is further arranged on the input side of the gate terminal of the third IGBT driving module; the resistance value of the overvoltage protection resistor is not less than 40 omega.
Optionally, a current limiting diode is further disposed on one side of the output end of the comparison amplifier.
In another aspect of the present invention, a three-phase transformer is provided with an on-load tap changer circuit.
The invention provides an on-load voltage regulation driving switch circuit and a three-phase transformer using the same, wherein the on-load voltage regulation driving switch circuit comprises a first optical coupler, a second optical coupler, a comparison amplifier, a first IGBT driving module, a second IGBT driving module, a third IGBT driving module and other structural units. The on-load voltage regulation driving switch circuit with the structural unit and the three-phase transformer using the same can realize on-load voltage regulation of the three-phase transformer, have the advantages of simple structure, high reliability, rapid response, high regulation speed, no electric arc switching and the like, and can realize adjustment of an output voltage value, thereby providing help for realizing voltage stabilization, governing low voltage of a power distribution network and improving power supply quality.
Drawings
Fig. 1 is a circuit schematic diagram of an on-load tap changing drive switch circuit provided by the present invention;
fig. 2 is a schematic circuit diagram of a three-phase transformer using the switching circuit according to the present invention;
reference numerals: 1. a first optical coupler; 2. a second optical coupler; 3. a comparison amplifier; 4. a first IGBT drive module; 5. a second IGBT drive module; 6. a third IGBT drive module; and (Rcc): a power source; r0: a current limiting resistor; d1: a first anti-shock diode; d2: a second anti-shock diode; d3: a current limiting diode; r1: an overvoltage protection resistor.
Detailed Description
The on-load voltage regulation driving switch circuit can realize on-load voltage regulation of the three-phase transformer, has the advantages of rapid response, high regulation speed, no electric arc switching and the like, and can provide help for improving the stability of output voltage of a power distribution system and the quality of output electric energy.
The invention provides an on-load voltage regulation driving switch circuit, which specifically comprises a first optical coupler, a second optical coupler, a comparison amplifier, a first IGBT driving module, a second IGBT driving module and a third IGBT driving module, as shown in figure 1. The first optical coupler is composed of a first light emitting diode and a first phototriode, and the second optical coupler is composed of a second light emitting diode and a second phototriode. The first light-emitting diode is used for receiving a first driving control signal, the control extreme end of the first phototriode is adjacent to the light-emitting side of the first light-emitting diode, and the input extreme end of the first phototriode is connected with the positive electrode of the power supply; the second light-emitting diode is used for receiving a second driving control signal, the control electrode end of the second phototriode is adjacent to the light-emitting side of the second light-emitting diode, and the input electrode end of the second phototriode is connected with the positive electrode (the symbol is Rcc; wherein, the power supply is preferably +12V/+ 20V); the output pole end of the first phototriode is connected with the first input end of the comparison amplifier, and the output pole end of the second phototriode is connected with the second input end of the comparison amplifier; the output end of the comparison amplifier is respectively connected with the grid end of the first IGBT driving module and the grid end of the second IGBT driving module; the source terminal of the first IGBT driving module is connected with the positive electrode of a power supply, the drain terminal of the first IGBT driving module is connected with the source terminal of the second IGBT driving module, and the drain terminal of the second IGBT driving module is connected with the negative electrode of the power supply; the grid terminal of the third IGBT driving module is respectively connected with the drain terminal of the first IGBT driving module and the source terminal of the second IGBT driving module; the source terminal of the third IGBT driving module is connected with the positive electrode of the power supply; and the drain end of the third IGBT driving module is connected with the negative pole of the power supply.
In order to facilitate understanding of the present invention, the operation of the on-load tap changing driving switch circuit will be further described in detail with reference to the accompanying drawings. Firstly, the on-load voltage regulation driving switch circuit adopts an optical fiber triggering mode, and a first optical coupler and a second optical coupler respectively receive a first driving control signal and a second driving control signal. The first drive control signal and the second drive control signal can be further generated by a single chip microcomputer or other control modules. After the first optical coupler and the second optical coupler receive the first drive control signal and the second drive control signal and complete photoelectric conversion, the first drive control signal is sent to a first input end of the comparison amplifier through an output end of a first phototriode in the first optical coupler, the second drive control signal is sent to a second input end of the comparison amplifier through an output end of a second phototriode in the second optical coupler for comparison and amplification processing, and the comparison amplifier generates a trigger drive signal for subsequently driving the IGBT. It should be noted that, the correlation among the first driving control signal, the second driving control signal and the triggering driving signal can be determined by those skilled in the art according to the common general knowledge and the actual working requirement of the three-phase transformer, for example: assuming that the first driving control signal is a 0-value optical signal and the second driving control signal is a 1-value optical signal, the trigger driving signal generated after the processing of the comparison amplifier is a driving signal for turning on the subsequent IGBT. And when the first drive control signal is a 1-value optical signal and the second drive control signal is a 0-value optical signal, the trigger drive signal generated after the processing of the comparison amplifier is a drive signal for closing the subsequent IGBT. Then, a trigger driving signal generated by the comparison amplifier is loaded to the positions of the gate terminal of the first IGBT driving module and the gate terminal of the second IGBT driving module; the first IGBT driving module and the second IGBT driving module form a push-pull circuit which is used for jointly controlling the on/off of the third IGBT driving module. Therefore, the on-load voltage regulation driving switch circuit achieves the technical effect of driving the IGBT switch to switch according to the optical fiber trigger signal, and the two ends of the switch are always in an electrical isolation state.
Further, as a preferred embodiment of the present invention, a current limiting resistor R0 is further disposed on the positive output side of the power supply, and the resistance value of the current limiting resistor R0 is preferably set to 4.4k Ω for the purpose of preventing overload output current limitation; and between the input extreme of first phototriode and the positive pole of power, be provided with first protecting against shock diode D1 between the input extreme of second phototriode and the positive pole of power respectively, second protecting against shock diode D2, this first protecting against shock diode D1, second protecting against shock diode D2 are arranged in protecting first phototriode in the first optical coupler and the second phototriode in the second optical coupler, prevent that it from switching on to the voltage steady voltage in-process, high-voltage breakdown influences first phototriode, the life of second phototriode. And an overvoltage protection resistor R1 arranged on the input side of the gate terminal of the third IGBT driving module, wherein the resistance value of the overvoltage protection resistor R1 is not less than 40 omega, and the overvoltage protection resistor R1 is used for preventing the impact of overvoltage sharp pulse on the third IGBT driving module. Finally, a current limiting diode D3 is further disposed on the output side of the comparison amplifier, and the current limiting diode D3 can be used for protecting the first IGBT driving module and the second IGBT driving module.
Further, the invention also provides a three-phase transformer, which comprises the on-load tap changing driving switch circuit. For example, as shown in fig. 2, fig. 2 provides a schematic circuit diagram of a three-phase transformer including an on-load tap-changing driving switch circuit. The on-load voltage regulation driving switch circuit and the diode rectifier bridge work together to replace a traditional mechanical contact switch, the purpose of switching taps of the three-phase transformer is achieved (specifically, the number of turns of an effective winding is increased or reduced), and finally secondary regulation of output voltage is achieved, so that the technical effect of stabilizing voltage within a specified range is achieved. It can be understood that the three-phase transformer circuit shown in fig. 2 is only an example, and a person skilled in the art can completely further adjust the specific structure of the three-phase transformer according to actual working requirements, which is not described herein.
The invention provides an on-load voltage regulation driving switch circuit and a three-phase transformer using the same, wherein the on-load voltage regulation driving switch circuit comprises a first optical coupler, a second optical coupler, a comparison amplifier, a first IGBT driving module, a second IGBT driving module, a third IGBT driving module and other structural units. The on-load voltage regulation driving switch circuit with the structural unit and the three-phase transformer using the same can realize on-load voltage regulation of the three-phase transformer, have the advantages of simple structure, high reliability, rapid response, high regulation speed, no electric arc switching and the like, and can realize adjustment of an output voltage value, thereby providing help for realizing voltage stabilization, governing low voltage of a power distribution network and improving power supply quality.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (6)
1. On-load voltage regulation drive switch circuit, its characterized in that, including:
a first optical coupler, a second optical coupler; the first optical coupler consists of a first light emitting diode and a first phototriode, and the second optical coupler consists of a second light emitting diode and a second phototriode; the first light-emitting diode is used for receiving a first driving control signal, the control extreme end of the first phototriode is adjacent to the light-emitting side of the first light-emitting diode, and the input extreme end of the first phototriode is connected with the positive electrode of the power supply; the second light-emitting diode is used for receiving a second driving control signal, the control extreme end of the second phototriode is adjacent to the light-emitting side of the second light-emitting diode, and the input extreme end of the second phototriode is connected with the positive electrode of the power supply;
a comparison amplifier; the output pole end of the first phototriode is connected with the first input end of the comparison amplifier, and the output pole end of the second phototriode is connected with the second input end of the comparison amplifier;
the IGBT driving device comprises a first IGBT driving module, a second IGBT driving module and a third IGBT driving module; the output end of the comparison amplifier is respectively connected with the grid end of the first IGBT driving module and the grid end of the second IGBT driving module; the source terminal of the first IGBT driving module is connected with the positive electrode of a power supply, the drain terminal of the first IGBT driving module is connected with the source terminal of the second IGBT driving module, and the drain terminal of the second IGBT driving module is connected with the negative electrode of the power supply; the grid terminal of the third IGBT driving module is respectively connected with the drain terminal of the first IGBT driving module and the source terminal of the second IGBT driving module; the source terminal of the third IGBT driving module is connected with the positive electrode of the power supply; and the drain end of the third IGBT driving module is connected with the negative pole of the power supply.
2. The on-load tap changing drive switch circuit of claim 1, further comprising: the current limiting resistor is arranged on the output side of the positive electrode of the power supply; the resistance value of the current limiting resistor is 4.4k omega.
3. The on-load tap changing drive switch circuit of claim 1, further comprising: the first anti-shock diode is arranged between the input pole end of the first phototriode and the positive pole of the power supply, and the second anti-shock diode is arranged between the input pole end of the second phototriode and the positive pole of the power supply;
the positive end of the first anti-impact diode is connected with the positive electrode of the power supply, and the negative end of the first anti-impact diode is connected with the input end of the first phototriode; the positive end of the second anti-impact diode is connected with the negative end of the first anti-impact diode, and the negative end of the second anti-impact diode is connected with the input end of the second phototriode.
4. The on-load tap changing drive switch circuit according to claim 1, wherein an overvoltage protection resistor is further arranged on an input side of the gate terminal of the third IGBT drive module; the resistance value of the overvoltage protection resistor is not less than 40 omega.
5. The on-load tap changing drive switch circuit according to claim 1, wherein a current limiting diode is further provided on the output side of the comparison amplifier.
6. A three-phase transformer having the on-load tap changing drive switch circuit according to any one of claims 1 to 5 mounted thereon.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921622701.3U CN210325492U (en) | 2019-09-27 | 2019-09-27 | On-load voltage regulation driving switch circuit and three-phase transformer using same |
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| CN201921622701.3U CN210325492U (en) | 2019-09-27 | 2019-09-27 | On-load voltage regulation driving switch circuit and three-phase transformer using same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534323A (en) * | 2019-09-27 | 2019-12-03 | 山东广域科技有限责任公司 | The three-phase transformer of on-load voltage regulation driving switch circuit and the application switching circuit |
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2019
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110534323A (en) * | 2019-09-27 | 2019-12-03 | 山东广域科技有限责任公司 | The three-phase transformer of on-load voltage regulation driving switch circuit and the application switching circuit |
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| TR01 | Transfer of patent right |
Effective date of registration: 20230706 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: ELECTRIC POWER BRANCH, SINOPEC GROUP SHENGLI PETROLEUM ADMINISTRATION Co.,Ltd. Address before: 257000 electric building, Zibo Road, Dongying District, Shandong, Dongying Patentee before: ELECTRIC POWER BRANCH, SINOPEC GROUP SHENGLI PETROLEUM ADMINISTRATION Co.,Ltd. Patentee before: SHANDONG WIDE AREA TECHNOLOGY Co.,Ltd. |
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