CN114034923A - Automatic measurement winding broken string and three-phase active power synchrophasor precision leveling system - Google Patents
Automatic measurement winding broken string and three-phase active power synchrophasor precision leveling system Download PDFInfo
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- CN114034923A CN114034923A CN202111267139.9A CN202111267139A CN114034923A CN 114034923 A CN114034923 A CN 114034923A CN 202111267139 A CN202111267139 A CN 202111267139A CN 114034923 A CN114034923 A CN 114034923A
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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
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Abstract
The invention provides a synchronous phasor precision leveling system for automatically measuring winding disconnection and three-phase active power. The automatic measurement winding broken wire and three-phase active power synchronous phasor precise leveling system comprises a winding broken wire measurement system and a three-phase active power synchronous phasor leveling system, the automatic measurement winding broken line and three-phase active power synchronous phasor precise leveling system is characterized in that through the matching of the circuit operation monitoring module and the circuit operation identification unit, the running state of the three-phase circuit can be monitored and identified, the three-phase current monitoring module is matched with the current analysis module and the time delay monitoring module, the current of the three-phase circuit in operation can be monitored and analyzed, so that whether the winding breakage phenomenon occurs in the transformation equipment or not can be judged in time according to the current condition of the three-phase circuit, and the transformation equipment can be closed in time by the matching of the winding breakage judging module, the transformation equipment operation control module and the master station control center, so that the transformation equipment and related power equipment are protected.
Description
Technical Field
The invention relates to the technical field of three-phase circuit regulation, in particular to a precise leveling system for automatically measuring winding wire breakage and three-phase active power synchronous phasor.
Background
When the transformer operates, the power data of the transformer needs to be monitored in real time, and with the continuous development of network technology, the remote real-time monitoring of the operation state of the transformer can be realized through the internet of things technology, so that the operation condition of the transformer can be mastered in time. The winding broken line is one of the electric power fault phenomena of the transformer, when the winding broken line fault appears in the transformer, the influence can be caused to the electric power of the three-phase circuit of the low-voltage side of the transformer, the phenomenon that the active power in the three-phase circuit is unbalanced is caused, the active power in the three-phase circuit is unbalanced, the service life of distribution equipment and electric equipment can be influenced, and the distribution equipment and the electric equipment can be burnt even.
At present, the research on the winding disconnection and the three-phase active power imbalance does not realize the monitoring of the three-phase current imbalance of the power equipment, and when the power system generates the three-phase imbalance operation of the primary power equipment and measures the winding disconnection, the monitoring device does not have the monitoring function and cannot send alarm information in time, so that the measurement winding disconnection and the imbalance operation state of the power equipment cannot be found immediately through a manual mode on a dispatching automation system.
When the existing transformer runs, a system for monitoring the winding disconnection fault in real time does not exist, 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 transformation equipment and related power equipment, meanwhile, the imbalance phenomenon of active power of a three-phase circuit cannot be monitored and adjusted in real time, and certain damage can be caused to the transformer and the related power distribution equipment.
Disclosure of Invention
In order to achieve the purpose of automatically measuring the winding broken wire and the three-phase active power synchronous phasor precise leveling system, the invention is realized by the following technical scheme: the accurate leveling system of automatic measurement winding broken string and three-phase active power synchrophasor, including winding broken string measurement system and three-phase active power synchrophasor leveling system, winding broken string measurement system includes:
the transformation device comprises: the output end of the voltage transformation equipment is provided with a three-phase circuit;
the circuit operation monitoring module: the circuit operation monitoring module is internally provided with a circuit operation identification unit;
a circuit operation identification unit: the circuit is used for judging whether the circuit is in a working operation state or not;
three-phase current monitoring module: when the three-phase circuit used for monitoring the output end of the transformation equipment is in a working operation 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, 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 a delay monitoring unit is arranged in the three-phase current monitoring module;
a current analysis module: the current analysis module is internally provided with a current comparison unit which 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 and analyzing whether abnormal current occurs in the three-phase circuit;
a delay monitoring unit: the time delay monitoring unit is internally provided with a timing module which is internally set with timing time and used for timing and monitoring the abnormal condition in a single-phase circuit with abnormal current in the three-phase circuit, and the current analysis module is internally provided with a winding broken wire judgment unit;
a winding wire breakage judging module: judging whether the winding is broken according to the analysis result of the current analysis module on the current in the three-phase circuit and the result of the matched monitoring of the delay monitoring unit;
the variable-voltage operation control module: a shutdown for controlling the startup of the voltage transformation device;
the three-phase active power synchronous phasor leveling system comprises:
the master station control center: the monitoring system is used for monitoring and controlling the operation conditions of the output ends of the voltage equipment and the voltage transformation equipment in real time;
a user terminal: a power output terminal of the voltage indicating equipment;
the phase change control module: the load control switching device is used for controlling and switching the load of a three-phase circuit between the voltage transformation device and the user terminal;
the circuit data acquisition module: the system is used for monitoring and collecting electric power operation parameters in a three-phase circuit at the output end of the phase change equipment, wherein the electric power operation parameters comprise voltage, current, active power, reactive power and frequency;
the data monitoring and recording module: the circuit data acquisition module is used for acquiring the data of the circuit and the power operation parameters;
a network module: the network connection is used between the master station control center and the data monitoring and recording module of the transformer equipment;
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;
a remote control module: the phase-change control module is used for carrying out remote control operation on the phase-change control module.
Furthermore, the circuit operation identification module is located between the three-phase circuit of the power transmission end of the voltage transformation equipment and the three-phase current monitoring module and used for controlling the working state of the three-phase current monitoring module.
Furthermore, a current minimum value identification unit is arranged in the current comparison unit and 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 duration time of the abnormal current monitored by the three-phase current monitoring module.
Furthermore, the winding wire judging unit is connected with the master station control center through a network module, and the winding broken wire judging unit is electrically connected with the transformer equipment operation control module.
Further, the network module adopts a wireless network or optical fiber network transmission design.
Furthermore, the data monitoring and recording module is connected with the master station control center through a network module.
Furthermore, the master station control center is connected with the operation control module of the transformer equipment through a network module.
Furthermore, the data analysis module is electrically connected with the remote control, and the remote control module is connected with the commutation control module through a network module.
Compared with the prior art, the invention has the following beneficial effects:
1. the automatic measurement winding broken line 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 the circuit running monitoring module and the circuit running identification unit, the three-phase current monitoring module is matched with the current analysis module and the time delay monitoring module, the current of the running three-phase circuit can be monitored and analyzed, whether the winding broken line phenomenon occurs on the transformation equipment or not can be judged in time through the current condition of the three-phase circuit, the winding broken line judgment module is matched with the transformation equipment running control module and the master station control center, the transformation equipment can be closed in time, meanwhile, the winding broken line condition is fed back to the master station control center, remedial measures can be conveniently taken on the winding broken line condition in the first time, and meanwhile, the transformation equipment and related power equipment can be protected in time.
2. This automatic measure winding broken string and three-phase active power synchrophasor precision leveling system, design through circuit data acquisition module, can collect the electric power operating parameter of three-phase circuit in real time, utilize data monitoring record module to carry out the record to electric power operating parameter simultaneously, and give main website control center with electric power operating parameter transfer, data analysis module can carry out the analysis to the electric power parameter of sending back, when active power unbalance appears in three-phase circuit, data analysis module can give the remote control module with the result of analysis, and carry out remote control to commutation control module through the remote control module, in time switch the regulation to the load of three-phase circuit, in order to guarantee three-phase circuit active power's balance.
Drawings
FIG. 1 is a schematic view of a winding break measurement system according to the present invention;
FIG. 2 is a schematic diagram of three-phase active power synchronous phasor leveling according to the present invention;
FIG. 3 is a schematic diagram of a combined system for measuring winding breakage and leveling three-phase active power synchronous phasor
Fig. 4 is a schematic diagram of a system among the three-phase current monitoring module, the current analysis module and the delay monitoring unit according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the automatic measurement winding broken wire and three-phase active power synchronous phasor precise leveling system is as follows:
referring to fig. 1-4, the precise leveling system for automatically measuring winding disconnection and three-phase active power synchronous phasor comprises a winding disconnection measuring system and a three-phase active power synchronous phasor leveling system, wherein the winding disconnection measuring system comprises:
the transformation device comprises: the output end of the voltage transformation equipment is provided with a three-phase circuit;
the circuit operation monitoring module: the circuit operation monitoring module is internally provided with a circuit operation identification unit;
a circuit operation identification 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 or not can be conveniently determined, when the output circuit is identified to be in the reactive operation state, the three-phase current monitoring module cannot 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 can monitor 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, 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;
when a three-phase circuit at the output end of the voltage transformation device is in a working running state, the current value of each phase in the three-phase circuit is monitored so as to find the condition of abnormal current in the three-phase circuit in time, and a delay monitoring unit is arranged in a three-phase current monitoring module;
a current analysis module: the current analysis module is internally provided with a current comparison unit which 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 and analyzing whether abnormal current occurs in the three-phase circuit or not, namely the minimum current value in the three-phase current is 0;
a delay monitoring unit: the device comprises a time delay monitoring unit, a current analysis module, a winding disconnection judging unit and a winding disconnection judging unit, wherein the time delay monitoring unit is used for monitoring the effective time of abnormal current monitored by a three-phase current monitoring module, a timing module is arranged in the time delay monitoring unit, the timing module is internally provided with timing time and is used for timing and monitoring the abnormal situation in a single-phase circuit with abnormal current in a three-phase circuit, the abnormal current duration monitored by the three-phase current monitoring module is monitored, the winding disconnection judging unit judges that the winding disconnection situation occurs when the abnormal current duration exceeds the time set in the time delay monitoring unit;
a winding wire breakage judging module: judging whether a winding wire breakage 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 matched monitoring of the delay monitoring unit, and when the winding wire breakage condition is judged by the winding wire breakage judgment unit, closing the transformer equipment by the transformer equipment operation control module, and simultaneously transmitting the winding wire breakage measurement condition to the master station control center by the network module;
the variable-voltage operation control module: a shutdown for controlling the startup of the voltage transformation device;
the three-phase active power synchronous phasor leveling system comprises:
the master station control center: the main station control center can remotely control the operation control module of the voltage transformation equipment through the network module, and the voltage transformation equipment can be started through the operation control module of the voltage transformation equipment after the problem of winding disconnection is solved;
a user terminal: a power output terminal of the voltage indicating equipment;
the phase change control module: the system 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 the active power phasor in the three-phase circuit;
the circuit data acquisition module: the system is used for monitoring and collecting electric power operation parameters in a three-phase circuit at the output end of the phase change equipment, wherein the electric power operation parameters comprise voltage, current, active power, reactive power and frequency;
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;
a network module: the network connection is used between the master station control center and the data monitoring and recording module of the transformer equipment;
a data analysis module: the power monitoring and recording module is used for analyzing and processing the 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;
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, switching the load of the three-phase circuit through the phase change control module, and adjusting the active power phasor of the three-phase circuit to a balanced state.
The circuit operation identification module is positioned between a three-phase circuit of a power transmission end of the voltage transformation equipment and the three-phase current monitoring module 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.
And a time delay timing time range is set in the timing module and is used for monitoring the abnormal current duration monitored by the three-phase current monitoring module.
The winding wire judging unit is connected with the master station control center through a network module, and the winding broken wire judging unit is electrically connected with the transformer equipment operation control module.
The network module adopts a wireless network or optical fiber network transmission design.
The data monitoring and recording module is connected with the master station control center through a network module.
The master station control center is connected with the operation control module of the transformer equipment through a network module.
The data analysis module is electrically connected with the remote control, and the remote control module is connected with the commutation control module through a network module.
When the intelligent power supply device is used, the transformation device is controlled through the transformation device operation control module, the transformation device transmits electric power to the user terminal through the three-phase circuit to finish the power supply process, meanwhile, the circuit operation monitoring module can monitor 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 under the effect of the circuit operation identification unit, the three-phase current monitoring module cannot monitor the current of the three-phase circuit.
When the user terminal is in a power utilization 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 monitored three-phase current is analyzed by the current analysis module, when the three-phase current is abnormal, namely the minimum current value in the three-phase current is 0, the delay monitoring unit carries out delay monitoring on the abnormal current in the three-phase current.
When the duration time of the abnormal current exceeds the time set in the delay monitoring unit, the winding disconnection judging unit judges that the winding disconnection occurs, the transformer equipment is closed through the transformer equipment operation control module, meanwhile, the winding disconnection measuring 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 the transformer equipment can be started through the transformer equipment operation control module after the winding disconnection problem is solved.
When the three-phase circuit is in operation, the circuit data acquisition module can carry out real-time supervision to the electric power operation parameter of three-phase circuit, including voltage, electric current, active power, reactive power and frequency isoparametric of three-phase circuit to in conveying the parameter of monitoring to data monitoring record module, data monitoring record module passes through the network module and conveys electric power operation parameter back to main website control center, and main website control center is in data transfer to data analysis module, utilizes data analysis module to carry out the analysis to the operation parameter of three-phase circuit.
When the data analysis module analyzes and detects that the active power in the three-phase circuit has unbalanced load, at the moment, the data analysis module transmits a signal to the remote control module, the remote control module carries out remote control on the phase change control module through the network module, and switches 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 adjusted to be in a balanced state.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The precise leveling system for automatically measuring the winding disconnection and the three-phase active power synchronous phasor 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:
the transformation device comprises: the output end of the voltage transformation equipment is provided with a three-phase circuit;
the circuit operation monitoring module: the circuit operation monitoring module is internally provided with a circuit operation identification unit;
a circuit operation identification unit: the circuit is used for judging whether the circuit is in a working operation state or not;
three-phase current monitoring module: when the three-phase circuit used for monitoring the output end of the transformation equipment is in a working operation 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, 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 a delay monitoring unit is arranged in the three-phase current monitoring module;
a current analysis module: the current analysis module is internally provided with a current comparison unit which 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 and analyzing whether abnormal current occurs in the three-phase circuit;
a delay monitoring unit: the time delay monitoring unit is internally provided with a timing module which is internally set with timing time and used for timing and monitoring the abnormal condition in a single-phase circuit with abnormal current in the three-phase circuit, and the current analysis module is internally provided with a winding broken wire judgment unit;
a winding wire breakage judging module: judging whether the winding is broken according to the analysis result of the current analysis module on the current in the three-phase circuit and the result of the matched monitoring of the delay monitoring unit;
the variable-voltage operation control module: a shutdown for controlling the startup of the voltage transformation device;
the three-phase active power synchronous phasor leveling system comprises:
the master station control center: the monitoring system is used for monitoring and controlling the operation conditions of the output ends of the voltage equipment and the voltage transformation equipment in real time;
a user terminal: a power output terminal of the voltage indicating equipment;
the phase change control module: the load control switching device is used for controlling and switching the load of a three-phase circuit between the voltage transformation device and the user terminal;
the circuit data acquisition module: the system is used for monitoring and collecting electric power operation parameters in a three-phase circuit at the output end of the phase change equipment, wherein the electric power operation parameters comprise voltage, current, active power, reactive power and frequency;
the data monitoring and recording module: the circuit data acquisition module is used for acquiring the data of the circuit and the power operation parameters;
a network module: the network connection is used between the master station control center and the data monitoring and recording module of the transformer equipment;
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;
a remote control module: the phase-change control module is used for carrying out remote control operation on the phase-change control module.
2. The automatic measurement winding broken wire and three-phase active power synchronous phasor precision leveling system of claim 1, characterized in that: the circuit operation identification module is positioned between a three-phase circuit of a power transmission end of the voltage transformation equipment and the three-phase current monitoring module and used for controlling the working state of the three-phase current monitoring module.
3. The automatic measurement winding broken wire and three-phase active power synchronous phasor precision leveling system of claim 1, characterized in that: and 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.
4. The automatic measurement winding broken wire and three-phase active power synchronous phasor precision leveling system of claim 1, characterized in that: and a time delay timing time range is set in the timing module and is used for monitoring the abnormal current duration monitored by the three-phase current monitoring module.
5. The automatic measurement winding broken wire and three-phase active power synchronous phasor precision leveling system of claim 1, characterized in that: the winding wire judging unit is connected with the main station control center through a network module, and the winding broken wire judging unit is electrically connected with the transformer equipment operation control module.
6. The automatic measurement winding broken wire and three-phase active power synchronous phasor precision leveling system of claim 1, characterized in that: the network module adopts a wireless network or optical fiber network transmission design.
7. The automatic measurement winding broken wire and three-phase active power synchronous phasor precision leveling system of claim 1, characterized in that: the data monitoring and recording module is connected with the master station control center through a network module.
8. The automatic measurement winding broken wire and three-phase active power synchronous phasor precision leveling system of claim 1, characterized in that: and the master station control center is connected with the operation control module of the transformer equipment through a network module.
9. The automatic measurement winding broken wire and three-phase active power synchronous phasor precision leveling system of claim 1, characterized in that: the data analysis module is electrically connected with the remote control, and the remote control module is connected with the commutation control module through a network module.
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