CN114696296A - Secondary resonance elimination device based on thermosensitive material and using method thereof - Google Patents
Secondary resonance elimination device based on thermosensitive material and using method thereof Download PDFInfo
- Publication number
- CN114696296A CN114696296A CN202210284306.9A CN202210284306A CN114696296A CN 114696296 A CN114696296 A CN 114696296A CN 202210284306 A CN202210284306 A CN 202210284306A CN 114696296 A CN114696296 A CN 114696296A
- Authority
- CN
- China
- Prior art keywords
- resonance
- resistance
- module
- elimination
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/04—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers
- H02H7/05—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for transformers for capacitive voltage transformers, e.g. against resonant conditions
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/005—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions
- H02H9/007—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection avoiding undesired transient conditions avoiding or damping oscillations, e.g. fenoresonance or travelling waves
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/026—Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient
-
- 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
- H02J13/00001—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 the display of information or by user interaction, e.g. supervisory control and data acquisition systems [SCADA] or graphical user interfaces [GUI]
-
- 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
- H02J13/00016—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 using a wired telecommunication network or a data transmission bus
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- Computer Networks & Wireless Communication (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a secondary resonance elimination device based on thermosensitive materials and a using method thereof, and relates to the technical field of power grid operation. The secondary harmonic elimination device based on the thermosensitive material comprises a power supply module, a voltage sampling module, an ST single chip microcomputer processing unit, a communication unit, a harmonic elimination resistance module, a control module and a display module. According to the secondary resonance elimination device formed on the basis of the thermosensitive material and the using method thereof, the thermosensitive material with the positive temperature coefficient is connected into the secondary open voltage loop to absorb resonance energy, so that resonance elimination and resonance elimination stop do not interfere with normal operation of a system, the use is simple and convenient, maintenance is not needed, ferromagnetic resonance of various frequencies can be eliminated rapidly, and the accuracy is high.
Description
Technical Field
The invention relates to the technical field of power grid operation, in particular to a secondary resonance elimination device based on thermosensitive materials and a using method thereof.
Background
Under the reasons such as closing charging or ground fault elimination in the 6 ~ 35kV neutral point ungrounded power grid for voltage transformer is saturated, can produce ferromagnetic resonance, and ferromagnetic resonance can bring the unstability to the ground voltage, PT fuse blowout even other accidents such as explosion. In order to avoid the above-mentioned failure, two solutions are generally adopted, one is to connect a resonance elimination resistor (primary resonance elimination) to the neutral point of the primary side of the voltage transformer to suppress or eliminate resonance, and the other is to connect a secondary resonance elimination device (secondary resonance elimination) to the secondary side, so that the resonance intensity is gradually attenuated by consuming the resonance energy to realize resonance elimination. The one-time harmonic elimination has the problems of large volume, inconvenient installation mode, fixed resistance capacity, no intelligent operation, no need of installing one-time harmonic elimination resistor for each PT and the like, and the harmonic elimination can not be confirmed, so that the voltage of a neutral point is increased, and the misoperation of equipment is protected.
The principle of the secondary resonance elimination device in the current market is that a resonance elimination loop solid state relay is conducted during resonance, so that ferromagnetic resonance disappears rapidly under the damping action; however, the solid-state relay is turned on for a long time, and the resonance energy is heated to damage the secondary circuit, so that the solid-state relay needs to be controlled to repeat the on-off process, and the effect of the common secondary resonance elimination device is not obvious.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a secondary resonance elimination device based on thermosensitive materials and a using method thereof, and solves the problem of the secondary resonance elimination device in the current market, and the principle is that a resonance elimination loop solid-state relay is switched on during resonance, so that ferromagnetic resonance disappears rapidly under the damping action; however, the solid-state relay is required to control the solid-state relay to repeat the on-off process because the solid-state relay is conducted for a long time and the resonance energy is heated to damage the secondary loop, so that the problem that the effect of the common secondary resonance elimination device is not obvious is caused.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a secondary harmonic elimination device based on thermosensitive materials comprises a power supply module, a voltage sampling module, an ST single chip microcomputer processing unit, a communication unit, a harmonic elimination resistance module, a control module and a display module, wherein the power supply module, the ST single chip microcomputer processing unit, the communication unit and the display module are respectively connected with the communication unit, the control module is controlled by the ST single chip microcomputer processing unit in a logic mode, the communication unit is a CAN bus, the power supply module comprises an integrated power supply and an alarm drive connected with the integrated power supply, and the harmonic elimination resistance module is made of thermosensitive materials.
The use method of the secondary resonance elimination device based on the thermosensitive material comprises the following specific operations:
s1, sampling the bus voltage and the zero sequence voltage of the system through a voltage sampling module, judging the running state of the system by an ST single chip processing unit, and identifying whether the system has a resonance fault;
s2, when a system has a resonance fault and zero sequence voltage rises, the ST singlechip processing unit logically controls the resonance elimination resistance module to input resonance elimination resistance, when current passes through the heat-sensitive material resonance elimination resistance, the temperature rises, the resistance is rapidly increased according to the physical specificity of the material, the resistance is maximally increased to a kilohm level, the energy of ferromagnetic resonance is rapidly absorbed, resonance parameters are destroyed, resonance is rapidly and continuously eliminated, the output voltage is less than the opening starting voltage of the protection controller when the resistance is increased, and misjudgment of the protection controller is avoided;
s3, when the resonance is finished, the system voltage returns to normal, the ST singlechip processing unit logically controls the resonance elimination resistance module to quit the resonance elimination resistance, the temperature of the thermosensitive material is reduced, the resistance is rapidly reduced to return to a normal resistance value, and the normal resistance value is dozens of ohms, so that the metering precision of the rear-stage protection controller cannot be influenced;
and S4, the display module records and displays the fault event record.
(III) advantageous effects
The invention provides a secondary resonance elimination device based on thermosensitive materials and a using method thereof. The method has the following beneficial effects:
according to the secondary resonance elimination device formed on the basis of the thermosensitive material and the using method thereof, the thermosensitive material with the positive temperature coefficient is connected into the secondary open voltage loop to absorb resonance energy, so that resonance elimination and resonance elimination stop do not interfere with normal operation of a system, the use is simple and convenient, maintenance is not needed, ferromagnetic resonance of various frequencies can be eliminated rapidly, and the accuracy is high.
Drawings
FIG. 1 is a schematic view of the structure of 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.
Referring to fig. 1, the present invention provides a technical solution: a secondary harmonic elimination device based on thermosensitive materials comprises a power supply module, a voltage sampling module, an ST single chip microcomputer processing unit, a communication unit, a harmonic elimination resistance module, a control module and a display module, wherein the power supply module, the ST single chip microcomputer processing unit, the communication unit and the display module are respectively connected with the communication unit, the control module is controlled by the ST single chip microcomputer processing unit in a logic mode, the communication unit is a CAN bus, the power supply module comprises an integrated power supply and an alarm drive connected with the integrated power supply, and the harmonic elimination resistance module is made of thermosensitive materials.
The use method of the secondary resonance elimination device based on the thermosensitive material comprises the following specific operations:
s1, sampling the bus voltage and the zero sequence voltage of the system through a voltage sampling module, judging the running state of the system by an ST single chip processing unit, and identifying whether the system has a resonance fault;
s2, when a system has a resonance fault and zero sequence voltage rises, the ST singlechip processing unit logically controls the resonance elimination resistance module to input resonance elimination resistance, when current passes through the heat-sensitive material resonance elimination resistance, the temperature rises, the resistance is rapidly increased according to the physical specificity of the material, the resistance is maximally increased to a kilohm level, the energy of ferromagnetic resonance is rapidly absorbed, resonance parameters are destroyed, resonance is rapidly and continuously eliminated, the output voltage is less than the opening starting voltage of the protection controller when the resistance is increased, and misjudgment of the protection controller is avoided;
s3, when the resonance is finished, the system voltage returns to normal, the ST singlechip processing unit logically controls the resonance elimination resistance module to quit the resonance elimination resistance, the temperature of the thermosensitive material is reduced, the resistance is rapidly reduced to return to a normal resistance value, and the normal resistance value is dozens of ohms, so that the metering precision of the rear-stage protection controller cannot be influenced;
and S4, the display module records and displays the fault event record.
The secondary resonance elimination device based on the thermosensitive material utilizes the thermosensitive material resistor with a positive temperature coefficient to quickly and accurately eliminate ferromagnetic resonance of various frequencies in a secondary circuit, prevents the condition that the neutral point voltage is increased to cause false operation of protection equipment due to resonance, and maintains safe and reliable operation of power supply departments and power systems of users.
In summary, the secondary resonance elimination device based on the thermosensitive material and the using method thereof have the advantages that the thermosensitive material with the positive temperature coefficient is connected into the secondary open voltage loop to absorb resonance energy, so that resonance elimination and stopping resonance elimination do not interfere with normal operation of the system, the use is simple and convenient, maintenance is not needed, ferromagnetic resonance of various frequencies can be eliminated rapidly, and the accuracy is high.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 (2)
1. A secondary harmonic elimination device based on thermosensitive materials is characterized in that: the power supply module, the ST single chip microcomputer processing unit, the communication unit, the resonance elimination resistance module, the control module and the display module are respectively connected with the communication unit, the control module is controlled logically by the ST single chip microcomputer processing unit, the communication unit is a CAN bus, the power supply module comprises an integrated power supply and an alarm drive connected with the integrated power supply, and the resonance elimination resistance module is made of a thermosensitive material.
2. A use method of a secondary resonance elimination device based on thermosensitive materials is characterized in that: the second harmonic elimination device based on the thermosensitive material as claimed in claim 1, which is operated as follows:
s1, sampling the bus voltage and the zero sequence voltage of the system through a voltage sampling module, judging the running state of the system by an ST single chip processing unit, and identifying whether the system has a resonance fault;
s2, when a system has a resonance fault and zero sequence voltage rises, the ST singlechip processing unit logically controls the resonance elimination resistance module to input resonance elimination resistance, when current passes through the heat-sensitive material resonance elimination resistance, the temperature rises, the resistance is rapidly increased according to the physical specificity of the material, the resistance is maximally increased to a kilohm level, the energy of ferromagnetic resonance is rapidly absorbed, resonance parameters are destroyed, resonance is rapidly and continuously eliminated, the output voltage is less than the opening starting voltage of the protection controller when the resistance is increased, and misjudgment of the protection controller is avoided;
s3, when the resonance is finished, the system voltage returns to normal, the ST singlechip processing unit logically controls the resonance elimination resistance module to quit the resonance elimination resistance, the temperature of the thermosensitive material is reduced, the resistance is rapidly reduced to return to a normal resistance value, and the normal resistance value is dozens of ohms, so that the metering precision of the rear-stage protection controller cannot be influenced;
and S4, the display module records and displays the fault event record.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210284306.9A CN114696296A (en) | 2022-03-22 | 2022-03-22 | Secondary resonance elimination device based on thermosensitive material and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210284306.9A CN114696296A (en) | 2022-03-22 | 2022-03-22 | Secondary resonance elimination device based on thermosensitive material and using method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114696296A true CN114696296A (en) | 2022-07-01 |
Family
ID=82138538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210284306.9A Pending CN114696296A (en) | 2022-03-22 | 2022-03-22 | Secondary resonance elimination device based on thermosensitive material and using method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114696296A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117691557A (en) * | 2024-02-04 | 2024-03-12 | 国网安徽省电力有限公司电力科学研究院 | PTC resistance reduction acceleration assembly and method for PT current limiting resonance elimination |
-
2022
- 2022-03-22 CN CN202210284306.9A patent/CN114696296A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117691557A (en) * | 2024-02-04 | 2024-03-12 | 国网安徽省电力有限公司电力科学研究院 | PTC resistance reduction acceleration assembly and method for PT current limiting resonance elimination |
| CN117691557B (en) * | 2024-02-04 | 2024-04-26 | 国网安徽省电力有限公司电力科学研究院 | PTC resistance reduction acceleration assembly and method for PT current limiting resonance elimination |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2019100774A1 (en) | Electric heater protection method and device, and air conditioner | |
| CN103353739B (en) | The anti-overflow anti-leaking method of tap water indoor and device thereof | |
| CN110064149A (en) | Couple the new energy bus battery automatic fire extinguisher and control method of BMS | |
| CN114696296A (en) | Secondary resonance elimination device based on thermosensitive material and using method thereof | |
| CN106025444A (en) | Battery heating control method in electrically driven vehicle, and system thereof | |
| WO2020224537A1 (en) | Transformer digital adaptive protection apparatus and method based on pressure characteristics | |
| CN201122115Y (en) | Point type constant temperature-sensitive fire detector | |
| CN203949384U (en) | A kind of electrical heating boiling-hot water device | |
| CN204495934U (en) | The detection system of consumer fault | |
| CN112909381A (en) | Battery heating circuit, controller and method | |
| CN112799442A (en) | Battery chamber detection system that soaks | |
| CN210542971U (en) | New forms of energy big bus battery automatic fire extinguishing device of coupling BMS | |
| CN206919427U (en) | Control system of electric water heater and electric heater | |
| CN106813342B (en) | A kind of control method of infrared humidifier and infrared humidifier | |
| CN105429097A (en) | Fire power supply bus short circuit recognition and protection circuit | |
| CN106405174A (en) | Intelligent electric energy meter measuring box | |
| CN105914749B (en) | Intelligent limit load controller | |
| CN213633724U (en) | Low-voltage circuit breaker operation circuit on-line monitoring device | |
| CN208766253U (en) | A kind of device for monitoring voltage-limit type SPD operating condition on-line | |
| CN105988392A (en) | Warmer load detection device based on single chip microcomputer | |
| US4626832A (en) | Solar system fault detection | |
| CN214753918U (en) | Battery heating circuit and controller | |
| CN215491832U (en) | Gas relay action setting value setting system during oil pump start and stop | |
| JPS6119332Y2 (en) | ||
| CN210246301U (en) | High-low resistance switchable resistor device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |