CN113300370A - Automatic low-voltage intelligent substation area line voltage adjusting method - Google Patents
Automatic low-voltage intelligent substation area line voltage adjusting method Download PDFInfo
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- CN113300370A CN113300370A CN202110587837.0A CN202110587837A CN113300370A CN 113300370 A CN113300370 A CN 113300370A CN 202110587837 A CN202110587837 A CN 202110587837A CN 113300370 A CN113300370 A CN 113300370A
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000002955 isolation Methods 0.000 claims abstract description 48
- 230000004927 fusion Effects 0.000 claims abstract description 13
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 4
- 238000004128 high performance liquid chromatography Methods 0.000 claims description 4
- 230000010354 integration Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 241001465382 Physalis alkekengi Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
- H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
- H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
- H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
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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
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- 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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
-
- 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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/126—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wireless data transmission
Abstract
The invention relates to a method for automatically adjusting line voltage of a low-voltage intelligent power station area. The intelligent power supply system comprises an isolation transformer, an intelligent gear controller, an intelligent circuit breaker, an intelligent fusion terminal and the like. The invention connects two-phase lines in the low-voltage distribution transformer in series through the isolation transformer and uses the two-phase lines in a voltage reduction way. The high-low voltage turn ratio of the isolation transformer is adjusted in a self-adaptive mode through the intelligent gear controller and the intelligent fusion terminal, so that the power utilization voltage of a terminal user is adjusted intelligently, and meanwhile, the line voltage of a transformer area is monitored in real time by combining with a new generation of power distribution cloud master station. The invention solves the problem of low voltage commonly existing at the end user of the low-voltage distribution area, and has the advantages of no harmonic interference, high efficiency, strong loading capacity, economy and the like.
Description
Technical Field
The invention belongs to the field of low-voltage intelligent power distribution, and particularly relates to an automatic low-voltage intelligent substation area line voltage adjusting method.
Background
The low-voltage distribution area is a key link of the intelligent power grid, has the problem of electric energy quality for a long time, and seriously threatens the safe and reliable operation of power utilization of users. The voltage quality problem is particularly prominent in low-voltage distribution areas. Low voltage problems have long been experienced by end users of lines due to significant increases in line supply radius and load. The traditional method of adding distribution points can solve the problem of low voltage of users, but has no economy. The low voltage problem seriously affects the electricity consumption experience of users, and causes the shortening and even damage of the service life of household appliances, the reduction of the illumination intensity of lighting lamps and lanterns and the increase of line loss.
Based on the problems, the invention provides the automatic low-voltage intelligent transformer area line voltage adjusting method, which can effectively improve the power supply capacity of the low-voltage distribution transformer area line and the problem of low terminal voltage, and meanwhile, the intelligent transformer area line voltage quality is monitored in real time by combining a new generation of intelligent fusion terminal and a distribution cloud master station, so that the intelligent transformer area line voltage control is realized.
Disclosure of Invention
The invention aims to provide an automatic line voltage adjusting method for a low-voltage intelligent power station area by combining a new-generation intelligent fusion terminal and a power distribution cloud master station aiming at the problem of low voltage at the tail end of the low-voltage intelligent power station area.
In order to achieve the purpose, the technical scheme of the invention is as follows: a low-voltage intelligent substation area line voltage automatic regulation method is provided with an isolation transformer, an intelligent gear controller, a gear regulating switch, a first intelligent circuit breaker, a second intelligent circuit breaker and an intelligent fusion terminal; two ends of input voltage are respectively connected with two input ends of a first intelligent circuit breaker, a first output end of the first intelligent circuit breaker is connected with a first input end of an isolation transformer through a gear adjusting switch, a second output end of the first intelligent circuit breaker is connected with a second input end of the isolation transformer, and two output ends of the isolation transformer realize voltage output through a second intelligent circuit breaker; the method controls a gear adjusting switch through an intelligent gear controller, adjusts the turn ratio of an input coil and an output coil of an isolation transformer, and realizes multi-stage adjustment of the output voltage of the isolation transformer;
the number of turns of the isolation transformer is adjustable in multiple stages, so that the voltage reduction effect is realized;
the intelligent gear controller comprises a gear shift switch driver for controlling a gear adjusting switch, an input voltage and current sensor for detecting input voltage and an output voltage and current sensor for detecting output voltage, and can automatically control the gear adjusting switch to adjust the turn ratio of the isolation transformer according to the input voltage and the output voltage so as to realize multi-stage adjustment of the output voltage;
the gear adjusting switch is used for adjusting the turn ratio of an input coil and an output coil of the isolation transformer;
the first intelligent circuit breaker and the second intelligent circuit breaker are used for realizing overload protection, overvoltage protection, undervoltage protection and low-voltage protection;
the intelligent integration terminal is used for monitoring the intelligent gear controller and uploading data to the power distribution cloud master station.
In an embodiment of the present invention, the gear adjusting switch includes a 1 st to an nth switch, one end of the 1 st to the nth switch is connected to a first output end of the first intelligent circuit breaker, and the other end of the 1 st to the nth switch is respectively connected to a corresponding node of a first input end of the isolation transformer, that is, respectively connected to different positions of an input coil of the isolation transformer, so as to adjust a turn ratio of the input coil and an output coil of the isolation transformer in the access circuit.
In an embodiment of the invention, the input voltage is 380V of the distribution transformer line voltage in the transformer area, and the output voltage range is 380V-220V.
In an embodiment of the invention, the intelligent gear controller can automatically control the voltage of a terminal user and can manually operate the turn ratio of the isolation transformer to realize voltage gear adjustment.
In an embodiment of the invention, the electric quantities including voltage and current, active power, reactive power and power factor are measured by the intelligent fusion terminal and are uploaded to the cloud master station.
In one embodiment of the invention, the intelligent fusion terminal controls and monitors the intelligent gear controller through signals including RS-485/HPLC/wireless, and uploads the intelligent gear controller and line state information to the cloud master station.
Compared with the prior art, the invention has the following beneficial effects:
A) the problem of low voltage of the end user of the low-voltage transformer area is solved.
B) The intelligent monitoring of the voltage quality of the low-voltage transformer area is realized based on the intelligent integration terminal and the power distribution cloud master station.
C) The problem of too high input of the existing transformer area low-voltage treatment method is solved, and obvious economic benefits are achieved.
Drawings
Fig. 1 is a schematic diagram of an automatic low-voltage intelligent distribution room line voltage adjusting method according to the present invention.
Detailed Description
The technical scheme of the invention is specifically explained below with reference to the accompanying drawings.
The invention relates to an automatic line voltage adjusting method for a low-voltage intelligent power station area, which comprises the steps of providing an isolation transformer, an intelligent gear controller, a gear adjusting switch, a first intelligent circuit breaker, a second intelligent circuit breaker and an intelligent fusion terminal; two ends of input voltage are respectively connected with two input ends of a first intelligent circuit breaker, a first output end of the first intelligent circuit breaker is connected with a first input end of an isolation transformer through a gear adjusting switch, a second output end of the first intelligent circuit breaker is connected with a second input end of the isolation transformer, and two output ends of the isolation transformer realize voltage output through a second intelligent circuit breaker; the method controls a gear adjusting switch through an intelligent gear controller, adjusts the turn ratio of an input coil and an output coil of an isolation transformer, and realizes multi-stage adjustment of the output voltage of the isolation transformer;
the number of turns of the isolation transformer is adjustable in multiple stages, so that the voltage reduction effect is realized;
the intelligent gear controller comprises a gear shift switch driver for controlling a gear adjusting switch, an input voltage and current sensor for detecting input voltage and an output voltage and current sensor for detecting output voltage, and can automatically control the gear adjusting switch to adjust the turn ratio of the isolation transformer according to the input voltage and the output voltage so as to realize multi-stage adjustment of the output voltage;
the gear adjusting switch is used for adjusting the turn ratio of an input coil and an output coil of the isolation transformer;
the first intelligent circuit breaker and the second intelligent circuit breaker are used for realizing overload protection, overvoltage protection, undervoltage protection and low-voltage protection;
the intelligent integration terminal is used for monitoring the intelligent gear controller and uploading data to the power distribution cloud master station.
The gear adjusting switch comprises 1 st to Nth switches, one ends of the 1 st to Nth switches are connected to a first output end of the first intelligent circuit breaker, and the other ends of the 1 st to Nth switches are respectively connected with corresponding nodes of a first input end of the isolation transformer, namely the other ends of the 1 st to Nth switches are respectively connected with different positions of an input coil of the isolation transformer, so that the turn ratio of the input coil and the output coil of the isolation transformer in the access circuit is adjusted.
The input voltage is 380V of the distribution transformer line voltage in the transformer area, and the output voltage range is 380V-220V.
The intelligent gear controller can automatically control the voltage of a terminal user and can manually operate the turn ratio of the isolation transformer to realize voltage gear adjustment.
The electric quantity including voltage current, active power, reactive power and power factor is measured through the intelligent fusion terminal and is transmitted to the cloud main station. The intelligent fusion terminal controls and monitors the intelligent gear controller through signals including RS-485/HPLC/wireless, and sends the intelligent gear controller and the line state information to the cloud master station.
The following is a specific example of the present invention.
As shown in fig. 1, the method for automatically adjusting line voltage of a low-voltage intelligent transformer area of the present invention includes an isolation transformer, an intelligent gear controller, a gear adjusting switch, an intelligent circuit breaker, an intelligent convergence terminal, and the like. On the line, the invention connects two single-phase lines (typically 220V) in series through the high-voltage side of the isolation transformer, namely the input side of the isolation transformer is the line voltage (typically 380V). The number of turns on the high-voltage side of the isolation transformer is adjustable in multiple stages, the number of turns on the low-voltage side of the isolation transformer is fixed, the number of turns on the high-voltage side is adjusted through the intelligent gear controller and the gear adjusting switch, the typical value of the output voltage adjusting range of the isolation transformer is 380V-220V, and the power supply capacity and the tail end low voltage problem of a low-voltage line are improved.
In fig. 1, the intelligent gear controller communicates with the station area intelligent convergence terminal in a manner including but not limited to RS-485, HPLC, wireless, etc., to realize automatic regulation and monitoring of line voltage. Meanwhile, line voltage quality data are uploaded to a power distribution cloud master station through the intelligent fusion terminal, and the problem of line voltage is cooperatively managed by the cloud side. The intelligent circuit breaker is used for realizing functions including but not limited to overload protection, overvoltage protection, undervoltage protection, low-voltage protection and the like, and can realize remote control through the intelligent fusion terminal.
The above are preferred embodiments of the present invention, and all changes made according to the technical scheme of the present invention that produce functional effects do not exceed the scope of the technical scheme of the present invention belong to the protection scope of the present invention.
Claims (6)
1. A low-voltage intelligent substation area line voltage automatic regulation method is characterized by comprising the steps of providing an isolation transformer, an intelligent gear controller, a gear regulating switch, a first intelligent circuit breaker, a second intelligent circuit breaker and an intelligent fusion terminal; two ends of input voltage are respectively connected with two input ends of a first intelligent circuit breaker, a first output end of the first intelligent circuit breaker is connected with a first input end of an isolation transformer through a gear adjusting switch, a second output end of the first intelligent circuit breaker is connected with a second input end of the isolation transformer, and two output ends of the isolation transformer realize voltage output through a second intelligent circuit breaker; the method controls a gear adjusting switch through an intelligent gear controller, adjusts the turn ratio of an input coil and an output coil of an isolation transformer, and realizes multi-stage adjustment of the output voltage of the isolation transformer;
the number of turns of the isolation transformer is adjustable in multiple stages, so that the voltage reduction effect is realized;
the intelligent gear controller comprises a gear shift switch driver for controlling a gear adjusting switch, an input voltage and current sensor for detecting input voltage and an output voltage and current sensor for detecting output voltage, and can automatically control the gear adjusting switch to adjust the turn ratio of the isolation transformer according to the input voltage and the output voltage so as to realize multi-stage adjustment of the output voltage;
the gear adjusting switch is used for adjusting the turn ratio of an input coil and an output coil of the isolation transformer;
the first intelligent circuit breaker and the second intelligent circuit breaker are used for realizing overload protection, overvoltage protection, undervoltage protection and low-voltage protection;
the intelligent integration terminal is used for monitoring the intelligent gear controller and uploading data to the power distribution cloud master station.
2. The method for automatically adjusting the line voltage of the low-voltage intelligent power station area according to claim 1, wherein the gear adjusting switches comprise 1 st to nth switches, one ends of the 1 st to nth switches are connected to the first output end of the first intelligent circuit breaker, and the other ends of the 1 st to nth switches are respectively connected to corresponding nodes of the first input end of the isolation transformer, that is, the other ends are respectively connected to different positions of the input coil of the isolation transformer, so as to adjust the turn ratio of the input coil and the output coil of the isolation transformer in the access circuit.
3. The automatic low-voltage intelligent power station line voltage regulating method according to claim 1, wherein the input voltage is 380V of a power station distribution transformer line voltage, and the output voltage range is 380V-220V.
4. The method for automatically adjusting the line voltage of the low-voltage intelligent power station area according to claim 1, wherein the intelligent gear controller can automatically control the voltage of a terminal user and can manually operate the turn ratio of the isolation transformer to realize voltage gear adjustment.
5. The automatic low-voltage intelligent substation area line voltage adjusting method according to claim 1, wherein electrical quantities including voltage current, active power, reactive power and power factor are measured through the intelligent convergence terminal and are uploaded to a cloud master station.
6. The automatic low-voltage intelligent substation area line voltage adjusting method as claimed in claim 1, wherein the intelligent convergence terminal controls and monitors the intelligent gear controller through signals including RS-485/HPLC/wireless, and sends the intelligent gear controller and line state information to the cloud master station.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110587837.0A CN113300370A (en) | 2021-05-28 | 2021-05-28 | Automatic low-voltage intelligent substation area line voltage adjusting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110587837.0A CN113300370A (en) | 2021-05-28 | 2021-05-28 | Automatic low-voltage intelligent substation area line voltage adjusting method |
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| Publication Number | Publication Date |
|---|---|
| CN113300370A true CN113300370A (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110587837.0A Pending CN113300370A (en) | 2021-05-28 | 2021-05-28 | Automatic low-voltage intelligent substation area line voltage adjusting method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169468A (en) * | 2007-11-27 | 2008-04-30 | 天津市百利电气有限公司 | Board back insertion type circuit breaker characteristic detection and test device |
| CN105006978A (en) * | 2015-08-26 | 2015-10-28 | 南方电网科学研究院有限责任公司 | Load voltage regulation device of distribution transformer |
| CN204947599U (en) * | 2015-08-21 | 2016-01-06 | 西安森宝电气工程有限公司 | Low-voltage circuit automatic voltage regulator |
| WO2016201968A1 (en) * | 2015-06-16 | 2016-12-22 | 江苏现代电力科技股份有限公司 | Low-voltage power distribution voltage-regulating device |
| CN106918747A (en) * | 2015-12-28 | 2017-07-04 | 中国石油天然气集团公司 | Transformer Winding number of turn error pattern detects method |
| CN108347076A (en) * | 2018-03-02 | 2018-07-31 | 爱乐邦特（天津）科技有限公司 | A kind of charging method and charger of wide pressure output |
| CN209233475U (en) * | 2019-01-25 | 2019-08-09 | 陕西金源自动化科技有限公司 | A kind of low-voltage circuit pressure regulator |
| CN111799074A (en) * | 2020-07-31 | 2020-10-20 | 北京博瑞莱智能科技周口有限公司 | Single-phase capacity-regulating and voltage-regulating transformer |
-
2021
- 2021-05-28 CN CN202110587837.0A patent/CN113300370A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101169468A (en) * | 2007-11-27 | 2008-04-30 | 天津市百利电气有限公司 | Board back insertion type circuit breaker characteristic detection and test device |
| WO2016201968A1 (en) * | 2015-06-16 | 2016-12-22 | 江苏现代电力科技股份有限公司 | Low-voltage power distribution voltage-regulating device |
| CN204947599U (en) * | 2015-08-21 | 2016-01-06 | 西安森宝电气工程有限公司 | Low-voltage circuit automatic voltage regulator |
| CN105006978A (en) * | 2015-08-26 | 2015-10-28 | 南方电网科学研究院有限责任公司 | Load voltage regulation device of distribution transformer |
| CN106918747A (en) * | 2015-12-28 | 2017-07-04 | 中国石油天然气集团公司 | Transformer Winding number of turn error pattern detects method |
| CN108347076A (en) * | 2018-03-02 | 2018-07-31 | 爱乐邦特（天津）科技有限公司 | A kind of charging method and charger of wide pressure output |
| CN209233475U (en) * | 2019-01-25 | 2019-08-09 | 陕西金源自动化科技有限公司 | A kind of low-voltage circuit pressure regulator |
| CN111799074A (en) * | 2020-07-31 | 2020-10-20 | 北京博瑞莱智能科技周口有限公司 | Single-phase capacity-regulating and voltage-regulating transformer |
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