CN114034923B - Automatic measurement winding disconnection and three-phase active power synchronous phasor precise leveling system - Google Patents
Automatic measurement winding disconnection and three-phase active power synchronous phasor precise leveling system Download PDFInfo
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- CN114034923B CN114034923B CN202111267139.9A CN202111267139A CN114034923B CN 114034923 B CN114034923 B CN 114034923B CN 202111267139 A CN202111267139 A CN 202111267139A CN 114034923 B CN114034923 B CN 114034923B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
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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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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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
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/22—Flexible AC transmission systems [FACTS] or power factor or reactive power compensating or correcting units
Abstract
The invention provides a synchronous phasor precise leveling system for automatically measuring winding breakage and three-phase active power. The automatic winding breakage measurement and three-phase active power synchronous phasor precise leveling system comprises a winding breakage measurement system and a three-phase active power synchronous phasor leveling system, wherein the automatic winding breakage measurement and three-phase active power synchronous phasor precise leveling system can monitor and identify the running state of a three-phase circuit through the cooperation of a circuit running monitoring module and a circuit running identification unit, the three-phase current monitoring module is matched with a current analysis module and a time delay monitoring module, and can monitor and analyze the current of the three-phase circuit in running so as to judge whether winding breakage phenomenon occurs to the transformer equipment in time through the current condition of the three-phase circuit, and the winding breakage judgment module is matched with a transformer equipment running control module and a master station control center, so that the transformer equipment can be closed in time to protect the transformer equipment and related power equipment.
Description
Technical Field
The invention relates to the technical field of three-phase circuit regulation and control, in particular to a synchronous phasor precise leveling system for automatically measuring winding wire breakage and three-phase active power.
Background
When the transformer is in operation, the running power data of the transformer needs to be monitored in real time, and along with the continuous development of network technology, the remote real-time monitoring of the running state of the transformer can be realized through the Internet of things technology, so that the running condition of the transformer can be mastered in time. Winding wire breakage is one of the power failure phenomena of a transformer, when the transformer has winding wire breakage failure, the power of a three-phase circuit at the low-voltage side of the transformer is affected, so that the active power in the three phases is unbalanced, the service lives of distribution equipment and electric equipment can be possibly affected, and even the distribution equipment and the electric equipment can be burnt.
At present, the research of winding disconnection and three-phase active power unbalance does not realize the monitoring of the three-phase current unbalance of the power equipment, and when the power system generates the three-phase unbalanced operation of the primary power equipment and the disconnection of the measurement winding, the measurement and control device cannot timely send out alarm information because of not having a monitoring function, so that the disconnection of the measurement winding and the unbalanced operation state of the power equipment cannot be immediately found by a manual mode in a dispatching automation system.
When the existing transformer is operated, a system for monitoring the winding disconnection fault in real time is not available, when the winding disconnection fault occurs, the system cannot respond to the transformer in time, the time for implementing remedial measures on the transformer can be delayed, certain influence can be caused on the transformer equipment and related power equipment, meanwhile, the unbalance phenomenon of active power in three phases cannot be monitored and regulated in real time, and certain damage can be caused on related power distribution equipment such as the transformer.
Disclosure of Invention
In order to achieve the purposes of automatically measuring winding disconnection and three-phase active power synchronous phasor precise leveling system, the invention is realized by the following technical scheme: the winding disconnection and three-phase active power synchronous phasor precise leveling system comprises a winding disconnection measuring system and a three-phase active power synchronous phasor leveling system, wherein the winding disconnection measuring system comprises:
a voltage transformation device: the power distribution and transmission control device is used for distributing and transmitting power, and the output end of the transformation equipment is provided with a three-phase circuit;
and the circuit operation monitoring module is used for: the circuit operation monitoring module is used for monitoring the operation state of an output end circuit of the voltage transformation equipment, and a circuit operation identification unit is arranged in the circuit operation monitoring module;
circuit operation recognition unit: the circuit is used for judging whether the circuit is in a working running state or not;
three-phase current monitoring module: when the three-phase circuit for monitoring the output end of the voltage transformation equipment is in a working running state, a single-phase current unit I1, a single-phase current unit I2 and a single-phase current unit I3 are arranged in the three-phase current monitoring module, and the single-phase current unit I1, the single-phase current unit I2 and the single-phase current unit I3 are used for respectively recording the current value of each phase in the three-phase circuit, and the three-phase current monitoring module is internally provided with a delay monitoring unit;
and a current analysis module: the current analysis module is internally provided with a current comparison unit, and the current comparison unit is used for comparing and analyzing current values recorded in the single-phase current unit I1, the single-phase current unit I2 and the single-phase current unit I3 to analyze whether abnormal current occurs in the three-phase circuit;
the delay monitoring unit: the device comprises a three-phase current monitoring module, a delay monitoring unit, a winding break judging unit, a current analyzing module, a time counting module and a control unit, wherein the three-phase current monitoring module is used for monitoring the effective time of abnormal current monitored by the three-phase current monitoring module;
winding broken wire judging module: judging whether a winding wire breakage condition occurs according to an analysis result of the current analysis module on the current in the three-phase circuit and a result of the matching monitoring of the delay monitoring unit;
and the variable-voltage operation control module is used for: a shut down for controlling the start-up of the voltage transformation device;
the three-phase active power synchronous phasor leveling system comprises:
the master station control center: the system is used for monitoring, controlling and managing the running condition of the output end of the voltage equipment and the voltage transformation equipment in real time;
user terminal: refers to an electric power output terminal of the voltage transformation equipment;
and the phase-change control module is used for: the control switch is used for controlling and switching the load of the three-phase circuit between the voltage transformation equipment and the user terminal;
and the circuit data acquisition module is used for: the power operation parameters in the three-phase circuit at the output end of the phase-change equipment are monitored and collected, and the power operation parameters comprise voltage, current, active power, reactive power and frequency;
and the data monitoring and recording module: the circuit data acquisition module is used for recording data collected in the circuit data acquisition module and setting parameters of power operation;
and (3) a network module: the system is used for network connection between the master station control center and the transformer equipment data monitoring and recording module;
and a data analysis module: the power parameter analysis module is used for analyzing and processing the power parameters recorded in the data monitoring and recording module;
and a remote control module: the device is used for remotely controlling the commutation control module;
when the data analysis module analyzes and detects that the active power in the three-phase circuit is unbalanced in load, the data analysis module transmits signals to the remote control module, the remote control module remotely controls the phase-change control module through the network module, and the load of the three-phase circuit is switched through the phase-change control module, so that the active power phasor of the three-phase circuit is regulated to be in an equilibrium state.
Further, the circuit operation identification module is located between the three-phase circuit and the three-phase current monitoring module at the power transmission end of the transformer equipment and is used for controlling the working state of the three-phase current monitoring module.
Further, a current minimum value identification unit is arranged in the current comparison unit and is used for identifying the minimum current in the three-phase circuit.
Furthermore, a time delay timing time range is set in the timing module and is used for monitoring the abnormal current duration time monitored by the three-phase current monitoring module.
Further, the winding broken wire judging unit is connected with the control center of the main station through a network module, and the winding broken wire judging unit is electrically connected with the operation control module of the voltage transformation equipment.
Further, the network module adopts a wireless network or an optical fiber network transmission design.
Further, the data monitoring and recording module is connected with the master station control center through a network module.
Further, the master station control center is connected with the operation control module of the voltage transformation equipment through a network module.
Further, the data analysis module is electrically connected with the remote control module, and the remote control module is connected with the commutation control module through the network module.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the automatic winding disconnection and three-phase active power synchronous phasor precise leveling system, the operation state of a three-phase circuit can be monitored and identified through the cooperation of the circuit operation monitoring module and the circuit operation identification unit, the three-phase current monitoring module is matched with the current analysis module and the time delay monitoring module, and the current of the three-phase circuit in operation can be monitored and analyzed, so that whether the winding disconnection phenomenon occurs in the transformer equipment can be judged through the current condition of the three-phase circuit in time, the winding disconnection judging module is matched with the operation control module of the transformer equipment and the master station control center, the transformer equipment can be closed in time, the winding disconnection condition is fed back to the master station control center, remedial measures can be conveniently made for the winding disconnection condition in the first time, and meanwhile the transformer equipment and related power equipment can be protected in time.
2. According to the automatic winding disconnection and three-phase active power synchronous phasor precise leveling system, through the design of the circuit data acquisition module, the electric power operation parameters of the three-phase circuit can be collected in real time, meanwhile, the electric power operation parameters are recorded by the data monitoring and recording module and transmitted to the master station control center, the transmitted electric power parameters can be analyzed by the data analysis module, when the three-phase circuit is unbalanced in active power, the analyzed result can be transmitted to the remote control module by the data analysis module, the remote control module is used for remotely controlling the phase change control module, and the load of the three-phase circuit is timely switched and adjusted, so that the balance of the active power of the three-phase circuit is ensured.
Drawings
FIG. 1 is a schematic diagram of a winding break measurement system according to the present invention;
FIG. 2 is a schematic diagram of the three-phase active power synchronous phasor leveling of the present invention;
FIG. 3 is a schematic diagram of a synchronous phasor leveling combined system for winding break measurement and three-phase active power according to the present invention
Fig. 4 is a schematic diagram of a system among a three-phase current monitoring module, a current analysis module and a delay monitoring unit according to the present invention.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the automatic measurement winding wire breakage and three-phase active power synchronous phasor precise leveling system is as follows:
referring to fig. 1-4, an automatic winding disconnection and three-phase active power synchronous phasor precise leveling system includes a winding disconnection measuring system and a three-phase active power synchronous phasor leveling system, the winding disconnection measuring system includes:
a voltage transformation device: the power distribution and transmission control device is used for distributing and transmitting power, and the output end of the transformation equipment is provided with a three-phase circuit;
and the circuit operation monitoring module is used for: the circuit operation monitoring module is used for monitoring the operation state of an output end circuit of the voltage transformation equipment to determine whether the output circuit is in an active operation state or a reactive operation state, and is internally provided with a circuit operation identification unit;
circuit operation recognition unit: the three-phase current monitoring module is used for judging whether the circuit is in a working operation state or not, so that whether the output circuit is in an active operation state or a reactive operation state is conveniently determined, when the output circuit is identified to be in the reactive operation state, the three-phase current monitoring module does not monitor the current of the three-phase circuit, and when the output circuit is identified to be in the active operation state, the three-phase current monitoring module monitors the current of the three-phase circuit;
three-phase current monitoring module: the three-phase current monitoring module is internally provided with a single-phase current unit I1, a single-phase current unit I2 and a single-phase current unit I3, wherein the single-phase current unit I1, the single-phase current unit I2 and the single-phase current unit I3 are used for respectively recording the current value of each phase in a three-phase circuit;
when the three-phase circuit at the output end of the voltage transformation equipment is in a working running state, the current value of each phase in the three-phase circuit is monitored so as to discover the abnormal current condition in the three-phase circuit in time, and the internal equipment of the three-phase current monitoring module delays the monitoring unit;
and a current analysis module: the current analysis module is internally provided with a current comparison unit, and the current comparison unit is used for comparing and analyzing current values recorded in the single-phase current unit I1, the single-phase current unit I2 and the single-phase current unit I3 to analyze whether abnormal current occurs in the three-phase circuit or not, namely, the minimum current value in the three-phase current is 0;
the delay monitoring unit: the device comprises a three-phase current monitoring module, a delay monitoring unit, a winding breakage judging unit, a time delay monitoring unit, a time counting module and a winding breakage judging unit, wherein the time counting module is arranged in the delay monitoring unit and is used for counting and monitoring abnormal conditions in a single-phase circuit with abnormal current in a three-phase circuit;
winding broken wire judging module: judging whether a winding disconnection condition occurs according to the analysis result of the current analysis module on the current in the three-phase circuit and the result of the matching monitoring of the delay monitoring unit, and when the winding disconnection judging unit judges that the winding disconnection condition occurs, closing the voltage transformation equipment through the voltage transformation equipment operation control module and simultaneously transmitting the winding disconnection measurement condition to a master station control center through the network module;
and the variable-voltage operation control module is used for: a shut down for controlling the start-up of the voltage transformation device;
the three-phase active power synchronous phasor leveling system comprises:
the master station control center: the control center of the main station can remotely control the operation control module of the voltage transformation equipment through the network module, and after the winding disconnection problem is relieved, the voltage transformation equipment can be started through the operation control module of the voltage transformation equipment;
user terminal: refers to an electric power output terminal of the voltage transformation equipment;
and the phase-change control module is used for: the control switch is used for controlling and switching the load of the three-phase circuit between the voltage transformation equipment and the user terminal so as to realize the balance of active power phasors in the three-phase circuit;
and the circuit data acquisition module is used for: the power operation parameters in the three-phase circuit at the output end of the phase-change equipment are monitored and collected, and the power operation parameters comprise voltage, current, active power, reactive power and frequency;
and the data monitoring and recording module: the data monitoring and recording module is connected with the master station control center through the network module and can transmit the data back to the master station control center;
and (3) a network module: the system is used for network connection between the master station control center and the transformer equipment data monitoring and recording module;
and a data analysis module: the power monitoring and recording module is used for analyzing and processing the electric power parameters recorded in the data monitoring and recording module and detecting whether the active power in the three-phase circuit is balanced or not;
and a remote control module: the remote control module is used for remotely controlling the phase-change control module, remotely controlling the phase-change control module through the network module, and switching the load of the three-phase circuit through the phase-change control module, so that the active power phasor of the three-phase circuit is regulated to be in a balanced state.
The circuit operation identification module is positioned between the three-phase circuit and the three-phase current monitoring module at the power transmission end of the transformer equipment and used for controlling the working state of the three-phase current monitoring module.
The current comparison unit is internally provided with a current minimum value identification unit which is used for identifying the minimum current in the three-phase circuit.
The timing module is internally provided with a time delay timing time range for monitoring the duration of abnormal current monitored by the three-phase current monitoring module.
The winding broken wire distinguishing unit is connected with the control center of the main station through a network module, and is electrically connected with the operation control module of the voltage transformation equipment.
The network module adopts a wireless network or an optical fiber network transmission design.
The data monitoring and recording module is connected with the master station control center through a network module.
The control center of the master station is connected with the operation control module of the voltage transformation equipment through a network module.
The data analysis module is electrically connected with the remote control module, and the remote control module is connected with the commutation control module through the network module.
When the three-phase current monitoring system is used, the voltage transformation equipment is controlled by the voltage transformation equipment operation control module, the voltage transformation equipment transmits electric power to the user terminal through the three-phase circuit, the power supply process is completed, meanwhile, the circuit operation monitoring module monitors the operation state of the three-phase circuit, when the user terminal is in a non-power-utilization state, at the moment, the circuit operation identification unit identifies that the three-phase circuit is in a reactive state, and the three-phase current monitoring module does not monitor the current of the three-phase circuit under the action of the circuit operation identification unit.
When the user terminal is in a power-on state, the circuit operation identification unit identifies that the three-phase circuit is in an active state, the circuit operation identification unit controls the three-phase current monitoring module to monitor the current of the three-phase circuit, the current analysis module is utilized to analyze the monitored three-phase current, and when abnormal current occurs to the three-phase current, namely the minimum current value in the three-phase current is 0, the time delay monitoring unit carries out time delay monitoring on the abnormal current in the three-phase current.
When the duration of the abnormal current exceeds the time set in the delay monitoring unit, the winding breakage judging unit judges that the winding breakage occurs, the transformer equipment is closed through the transformer equipment operation control module, meanwhile, the winding breakage measurement condition is transmitted to the master station control center through the network module, the master station control center can remotely control the transformer equipment operation control module through the network module, and after the winding breakage problem is relieved, the transformer equipment can be started through the transformer equipment operation control module.
When the three-phase circuit is operated, the circuit data acquisition module monitors the electric power operation parameters of the three-phase circuit in real time, including the parameters of the voltage, current, active power, reactive power, frequency and the like of the three-phase circuit, and transmits the monitored parameters to the data monitoring and recording module, the data monitoring and recording module transmits the electric power operation parameters back to the master station control center through the network module, the master station control center transmits data to the data analysis module, and the data analysis module is utilized to analyze the operation parameters of the three-phase circuit.
When the data analysis module analyzes and detects that the active power in the three-phase circuit is unbalanced in load, at the moment, the data analysis module transmits signals to the remote control module, the remote control module remotely controls the phase-change control module through the network module, and the load of the three-phase circuit is switched through the phase-change control module, so that the active power phasor of the three-phase circuit is regulated to be in an equilibrium state.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (2)
1. The automatic winding disconnection and three-phase active power synchronous phasor precise leveling system is characterized by comprising a winding disconnection measuring system and a three-phase active power synchronous phasor leveling system, wherein the winding disconnection measuring system comprises:
a voltage transformation device: the power distribution and transmission control device is used for distributing and transmitting power, and the output end of the transformation equipment is provided with a three-phase circuit;
and the circuit operation monitoring module is used for: the circuit operation monitoring module is used for monitoring the operation state of an output end circuit of the voltage transformation equipment, and a circuit operation identification unit is arranged in the circuit operation monitoring module;
circuit operation recognition unit: the circuit is used for judging whether the circuit is in a working running state or not;
three-phase current monitoring module: when the three-phase circuit for monitoring the output end of the voltage transformation equipment is in a working running state, a single-phase current unit I1, a single-phase current unit I2 and a single-phase current unit I3 are arranged in the three-phase current monitoring module, and the single-phase current unit I1, the single-phase current unit I2 and the single-phase current unit I3 are used for respectively recording the current value of each phase in the three-phase circuit, and the three-phase current monitoring module is internally provided with a delay monitoring unit;
and a current analysis module: the current analysis module is internally provided with a current comparison unit, and the current comparison unit is used for comparing and analyzing current values recorded in the single-phase current unit I1, the single-phase current unit I2 and the single-phase current unit I3 to analyze whether abnormal current occurs in the three-phase circuit;
the delay monitoring unit: the device comprises a three-phase current monitoring module, a delay monitoring unit, a winding break judging unit, a current analyzing module, a time counting module and a control unit, wherein the three-phase current monitoring module is used for monitoring the effective time of abnormal current monitored by the three-phase current monitoring module;
winding broken wire judging module: judging whether a winding wire breakage condition occurs according to an analysis result of the current analysis module on the current in the three-phase circuit and a result of the matching monitoring of the delay monitoring unit;
and the variable-voltage operation control module is used for: a shut down for controlling the start-up of the voltage transformation device;
the three-phase active power synchronous phasor leveling system comprises:
the master station control center: the system is used for monitoring, controlling and managing the running condition of the output end of the voltage equipment and the voltage transformation equipment in real time;
user terminal: refers to an electric power output terminal of the voltage transformation equipment;
and the phase-change control module is used for: the control switch is used for controlling and switching the load of the three-phase circuit between the voltage transformation equipment and the user terminal;
and the circuit data acquisition module is used for: the power operation parameters in the three-phase circuit at the output end of the phase-change equipment are monitored and collected, and the power operation parameters comprise voltage, current, active power, reactive power and frequency;
and the data monitoring and recording module: the circuit data acquisition module is used for recording data collected in the circuit data acquisition module and setting parameters of power operation;
and (3) a network module: the system is used for network connection between the master station control center and the transformer equipment data monitoring and recording module;
and a data analysis module: the power parameter analysis module is used for analyzing and processing the power parameters recorded in the data monitoring and recording module;
and a remote control module: the device is used for remotely controlling the commutation control module;
the circuit operation identification module is positioned between the three-phase circuit and the three-phase current monitoring module at the power transmission end of the transformer equipment and is used for controlling the working state of the three-phase current monitoring module;
the current comparison unit is internally provided with a current minimum value identification unit which is used for identifying the minimum current in the three-phase circuit;
the timing module is internally provided with a time delay timing time range for monitoring the duration of abnormal current monitored by the three-phase current monitoring module;
the winding broken wire judging unit is connected with the control center of the main station through a network module, and is electrically connected with the operation control module of the transformer equipment;
the network module adopts a wireless network or an optical fiber network transmission design;
the data monitoring and recording module is connected with the master station control center through a network module;
the data analysis module is electrically connected with the remote control module, and the remote control module is connected with the commutation control module through a network module;
when the data analysis module analyzes and detects that the active power in the three-phase circuit is unbalanced in load, the data analysis module transmits signals to the remote control module, the remote control module remotely controls the phase-change control module through the network module, and the load of the three-phase circuit is switched through the phase-change control module, so that the active power phasor of the three-phase circuit is regulated to be in an equilibrium state.
2. The automatic measurement winding break and three-phase active power synchronous phasor precision leveling system according to claim 1, wherein: the master station control center is connected with the transformer equipment operation control module through a network module.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802614A (en) * | 2018-05-31 | 2018-11-13 | 山西大学 | The monitoring warning device of wind power yawing motor |
| CN108802523A (en) * | 2018-05-31 | 2018-11-13 | 山西大学 | Wind power generator unit frequency converter is monitored on-line and trouble-shooter |
| CN111044828A (en) * | 2019-12-30 | 2020-04-21 | 国网山东省电力公司淄博供电公司 | Three-phase transformer winding parameter online monitoring method based on positive and negative sequence equations |
| CN111211545A (en) * | 2020-03-10 | 2020-05-29 | 国网福建省电力有限公司 | Method and system for protecting single-phase broken line at high-voltage side of transformer with balance winding |
| CN113419196A (en) * | 2021-05-07 | 2021-09-21 | 国网山东省电力公司淄博供电公司 | Single-phase transformer winding parameter online monitoring method based on load change |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2985613B1 (en) * | 2013-03-29 | 2022-02-09 | Beijing Inhand Networks Technology Co., Ltd. | Method and system for detecting and locating single-phase ground fault on low current grounded power-distribution network |
| CN204947733U (en) * | 2015-09-16 | 2016-01-06 | 山东舜雅电力科技集团有限公司 | A kind of device of the automatic leveling commutation that can not have a power failure |
| CN206807018U (en) * | 2017-05-23 | 2017-12-26 | 莱芜科泰电力科技有限公司 | Three-phase load unbalance self-checking device |
| CO2018000647A1 (en) * | 2018-01-24 | 2019-01-31 | Atp Trading S A S | Device for monitoring and protecting power distribution transformers on the low voltage side |
| CN108493964A (en) * | 2018-04-20 | 2018-09-04 | 国家电网公司 | Mixed type three-phase load unbalance automatic regulating apparatus |
| CN109088420A (en) * | 2018-09-05 | 2018-12-25 | 国网山东省电力公司枣庄供电公司 | A kind of low voltage electric network three-phase load unbalance regulator control system |
| CN110927627A (en) * | 2019-11-13 | 2020-03-27 | 广西电网有限责任公司防城港供电局 | Monitoring method for measuring winding wire breakage and three-phase current unbalanced operation by CT |
-
2021
- 2021-10-29 CN CN202111267139.9A patent/CN114034923B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108802614A (en) * | 2018-05-31 | 2018-11-13 | 山西大学 | The monitoring warning device of wind power yawing motor |
| CN108802523A (en) * | 2018-05-31 | 2018-11-13 | 山西大学 | Wind power generator unit frequency converter is monitored on-line and trouble-shooter |
| CN111044828A (en) * | 2019-12-30 | 2020-04-21 | 国网山东省电力公司淄博供电公司 | Three-phase transformer winding parameter online monitoring method based on positive and negative sequence equations |
| CN111211545A (en) * | 2020-03-10 | 2020-05-29 | 国网福建省电力有限公司 | Method and system for protecting single-phase broken line at high-voltage side of transformer with balance winding |
| CN113419196A (en) * | 2021-05-07 | 2021-09-21 | 国网山东省电力公司淄博供电公司 | Single-phase transformer winding parameter online monitoring method based on load change |
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