CN104267662A - Automatic feedback control system for temperature shock of buffering dry type electric reactor - Google Patents
Automatic feedback control system for temperature shock of buffering dry type electric reactor Download PDFInfo
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- CN104267662A CN104267662A CN201410551876.5A CN201410551876A CN104267662A CN 104267662 A CN104267662 A CN 104267662A CN 201410551876 A CN201410551876 A CN 201410551876A CN 104267662 A CN104267662 A CN 104267662A
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- feedback control
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- 230000035939 shock Effects 0.000 title claims abstract description 15
- 230000003139 buffering effect Effects 0.000 title claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims abstract description 20
- 239000010445 mica Substances 0.000 claims description 14
- 229910052618 mica group Inorganic materials 0.000 claims description 14
- 230000001105 regulatory effect Effects 0.000 claims description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 8
- 238000005485 electric heating Methods 0.000 claims description 4
- 229910052742 iron Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000009413 insulation Methods 0.000 abstract description 7
- 238000012545 processing Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 description 4
- 230000001052 transient effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/16—Plc to applications
- G05B2219/163—Domotique, domestic, home control, automation, smart, intelligent house
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses an automatic feedback control system for the temperature shock of a buffering dry type electric reactor. The automatic feedback control system is composed of a variable-air-speed axial flow fan body (1), a 24-hour real-time online detecting and signal collecting and processing state trigger source (2) and a programmable logic control device (3). The automatic feedback control system has the function of relieving the phenomenon that when a dry type reactor is input and cut off, shock heating and shock refrigerating of the interior of the reactor happen, and therefore turn-to-turn insulation becomes poor, and the automatic feedback control system has the advantages of being safe and stable in operation, compact, low in cost, small in occupied area and high in buffering temperature shock efficiency.
Description
Technical Field
The invention belongs to the technical field of temperature shock of a buffer dry type electric reactor for electric power.
Background
The dry reactor has the advantages of good linearity, low noise, high short-circuit resistance, easy maintenance and the like, plays an important role in maintaining the voltage stability of a power system, limiting short-circuit current, performing reactive compensation and the like, and is widely used in the power system at present.
The inter-turn insulation state of a dry reactor is a very important factor affecting its safe and stable operation. According to research and study, a large number of dry-type reactors are frequently burnt in recent years, the burning is just turn-to-turn short circuit caused by turn-to-turn insulation defects, and sudden heating and quenching of the internal temperature of the reactor are the main causes of turn-to-turn insulation damage when the reactor is put into and cut off.
At present, dry reactors in operation in an electric power system are not provided with relevant equipment or control systems for buffering temperature shock, so that the equipment in the electric power system is frequently burnt. The additional installation of the type of equipment can slow down the sudden change of the temperature in the transient process of the reactor input or cut off, thereby protecting the turn-to-turn insulation of the reactor, avoiding potential safety hazards such as insulation damage and the like, prolonging the service life of the dry type reactor and having important significance for improving the safe operation level of the power system equipment.
Disclosure of Invention
The invention focuses on designing a set of automatic feedback control system capable of buffering the temperature shock in the transient state process of the dry-type electric reactor, the system can monitor the temperature in the electric reactor in real time, and the function of preventing the temperature shock is realized through a related control device and buffering equipment. From the perspective of solving the practical technical problem, the invention can realize the safe, low-cost and automatic feedback control function of buffering the sudden temperature change of the dry-type reactor through an optimized conception and an exquisite component connecting device.
The invention aims to solve the problem that the turn-to-turn insulation is easily damaged due to sudden heating and quenching of the internal temperature in the transient state process of putting or cutting off the reactor at present, and promotes the research and application of the type to be further practical.
The invention is realized by the following technical scheme.
The invention discloses an automatic feedback control system for buffering sudden temperature change of a dry-type reactor, which is characterized in that the system is formed by sequentially connecting a state trigger source, a programmable logic control device and an axial flow fan body;
wherein,
the fan body consists of a distributed fan and a support device arranged at the bottom of the distributed fan, and the distributed fan is fixed on the support device; the distributed fan consists of a shell, a wind shield arranged at an air outlet at the top of the shell, an automatic control spring arranged at the upper part of a mica sheet and connected with the wind shield, a high-power heating wire arranged in the mica sheet, a support column connected with the lower part of the mica sheet and the bottom of the shell, an electromagnetic speed regulating motor arranged on the support column, and a fan blade arranged at the shaft end of the electromagnetic speed regulating motor, wherein the bottom of the mica sheet is provided with an air hole, a gap is reserved between the bottom of the shell and a support device, and the bottom of the shell of the distributed;
the state trigger source consists of an AD conversion module, a state judgment module, a signal output module and a power supply module; the power supply module, the CT current sensor of the dry reactor, the AD conversion module, the state judgment module and the signal output module are connected in sequence,
the programmable logic control device is formed by sequentially connecting a signal input module, a PLC programmable module and a function output module;
the signal output module of the state trigger source is connected with the signal input module of the programmable logic control device, and the function output module of the programmable logic control device is respectively connected with a wind shield of the fan, the high-power heating wire and the electromagnetic speed regulating motor.
The fan bodies are distributed 1 meter below the dry-type reactor, the number of the distributed fans is six, and each fan is respectively arranged in six encapsulated areas formed by dividing the flow gathering row and is fixed on the support device.
The shell is made of cold-rolled iron plate material and is designed in a cylindrical shape.
The high-power electric heating wire is designed in a spiral shape.
The automatic feedback control system for the temperature shock of the buffer dry type reactor for the electric power comprises an axial flow fan body with variable wind speed, a state trigger source for real-time online detection and signal acquisition and processing for 24 hours and a programmable logic control device. The fan body part of the system consists of six distributed fans and a bracket device for supporting the six distributed fans, and the six distributed fans are fixed on the bracket device through fastening devices. The fan bodies are distributed 1 meter below the dry-type reactor, wherein each fan is respectively arranged below six encapsulated areas formed by dividing the flow gathering row and is fixed on the support device. Each fan is composed of a wind shield, an automatic control spring, a mica sheet, a high-power heating wire, an electromagnetic speed regulation motor, a fan blade and a shell, wherein the automatic control spring controls the opening and closing of the wind shield, the high-power heating wire is arranged in the mica sheet serving as an insulating medium, and the wind blown into the reactor enclosure can be hot wind due to the input of the heating wire. The state trigger source is composed of a current state quantity extracted from a CT current sensor terminal, an AD conversion module, a state judgment module, a signal output module and a power supply module for supplying power to the current sensor. The programmable logic control device is composed of a signal input module, a PLC programmable module and a function output module, wherein the signal input module takes a signal output by an output control module of a state trigger source as an input signal.
The invention has the beneficial effects that:
a. the control system is arranged below the reactor by 1 meter, the occupied space is small, the disassembly and the assembly are convenient, and the assembly is simple;
b. the operation of the control system does not influence the state of the dry-type reactor in steady operation, and the service life of the reactor can be greatly prolonged;
c. the device adopts a PLC programmable logic control mode, and can adjust the signal processing mode according to the actual running condition;
d. the distributed arrangement of six fans in the control system is more favorable for the temperature control of multilayer encapsulation of the dry-type electric reactor.
The invention is further described with reference to the following figures and examples.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a complete control system;
FIG. 2 is a schematic view of the overall structure of each fan;
FIG. 3 is a transverse cross-sectional view of a high power heating wire;
FIG. 4 is a flow chart of the operation principle of the state trigger source and the programmable logic control device.
Detailed Description
As shown in fig. 1, 2, 3 and 4, the invention relates to an automatic feedback control system for buffering sudden temperature change of a dry reactor, which is characterized in that the system is sequentially connected by a state trigger source 2, a programmable logic control device 3 and an axial flow fan body 1;
wherein,
the fan body 1 is composed of a distributed fan 4 and a support device 5 arranged at the bottom of the distributed fan 4, and the distributed fan 4 is fixed on the support device 5; the distributed fan consists of a shell 12, a wind shield 6 arranged at an air outlet at the top of the shell 12, an automatic control spring 7 arranged at the upper part of a mica sheet 8 and connected with the wind shield 6, a high-power heating wire 9 arranged inside the mica sheet 8, a support column connected with the lower part of the mica sheet 8 and the bottom of the shell 12, an electromagnetic speed regulating motor 10 arranged on the support column, and a fan blade 11 arranged at the shaft end of the electromagnetic speed regulating motor 10, wherein the bottom of the mica sheet is provided with an air hole, a gap is reserved between the bottom of the shell 12 and a support device 5, and the bottom of the shell 12 of the distributed fan;
the state trigger source 2 is composed of an AD conversion module 14, a state judgment module 15, a signal output module 16 and a power supply module 17; the power module 17, the self-owned CT current sensor connection of the dry-type reactor, the AD conversion module 14, the state judgment module 15 and the signal output module 16 are sequentially connected;
the programmable logic control device 3 is formed by sequentially connecting a signal input module 18, a PLC programmable module 19 and a function output module 20;
the signal output module 16 of the state trigger source 2 is connected with the signal input module 18 of the programmable logic control device 3, and the function output module 20 of the programmable logic control device 3 is respectively connected with the wind shield 6 of the fan, the high-power heating wire 9 and the electromagnetic speed regulating motor 10.
The fan bodies are distributed 1 meter below the dry-type reactor, the number of the distributed fans 4 is six, and each fan is respectively arranged in six encapsulated areas formed by dividing the flow gathering row and is fixed on the support device 5.
The shell 12 is made of cold-rolled iron plate material and is designed in a cylindrical shape.
The high-power electric heating wire 9 is designed in a spiral shape.
Referring to fig. 1, a schematic diagram of the overall configuration of the integrated control system is shown. In the figure, a CT current sensor is a self-contained device of a dry-type reactor, the automatic feedback control system firstly collects the current state quantity of the CT, then carries out signal processing through a state trigger source 2, and sends the processed signal to a programmable logic control device 3 to control the operation of each component of a fan body. Fig. 1 also shows that the fan body is composed of six distributed fans 4 and a support device 5 for supporting the six distributed fans, and the six distributed fans are fixed on the support device through fastening devices and are arranged 1 m below the dry-type reactor. The distributed design of the six fans is more favorable for controlling the temperature of the whole dry-type reactor in a multilayer encapsulation mode.
Referring to fig. 2, a schematic diagram of the overall structure of each of the six distributed fans is shown. In order to facilitate the arrangement and high-efficiency operation of each fan, the fans are designed into a columnar structure, the wind shield 6 is arranged at an air outlet, so that redundant hot air or cold air is neutralized after the last operation of the device in the fan is ensured, and the required sufficient air output is achieved; the fan blade 11 is arranged on the shaft end of the electromagnetic speed-regulating motor 10, the electromagnetic speed-regulating motor 10 drives the rotor to drive the fan blade 11 to rotate, air is sucked from the air inlet, and centrifugal airflow formed by the rotation blows out required hot air or cold air from the air outlet through the high-power electric heating wire 9; the housing 12 is constructed of cold rolled iron sheet material, is cylindrical in design, is robust, and can withstand high temperatures.
Referring to fig. 3, a transverse cross-sectional view of a high-power heating wire in a fan is shown, and the air sucked from an air inlet can be heated more uniformly by adopting a spiral design. The high-power heating wire is put into operation when the dry-type reactor is in a cut-out state, so that hot air is blown into the reactor enclosure to buffer the phenomenon of temperature shock when the reactor is cut out; when the dry-type reactor is in a throwing state, the heating wire does not work, so that air blown into the reactor enclosure is cold air, and the phenomenon of sudden heating of the temperature when the reactor is thrown is buffered.
Referring to fig. 4, a flow chart illustrating the operation of the state trigger source and the programmable logic control device is shown. The state trigger source 2 of the control system collects a required current state quantity 13 from a CT current sensor terminal to which a reactor body structure belongs, converts a collected current analog signal into a digital signal through an AD conversion module 14, transmits the digital signal to a state judgment module 15, judges whether the dry-type reactor is in a transient state process and in which state the dry-type reactor is put in or cut off according to the current change quantity represented by the digital signal, transmits the state judgment result to the programmable logic control device 3 through a signal output module 16 for further processing, and a power supply module 17 in the state trigger source 2 is mainly used for providing power supply support for the current sensor. The signal input module 18 in the programmable logic control device 3 delivers the digital signal received from the signal output module 16 of the state trigger source 2 to the PLC programmable module 19 for processing, wherein the PLC programmable module 19 can reprogram the functional module itself according to the actual production needs to meet the requirements, and the programmable module 19 includes a programming module for controlling the wind deflector 6, the high-power heating wire 9 and the electromagnetic speed-regulating motor 10: the wind shield programming module controls the wind shield 6 to open and close through the automatic control spring 7 after the electromagnetic speed regulating motor 10 runs for 30 seconds; when the programmable logic control device 3 judges that the dry-type reactor is in a cut-out state, the high-power heating wire programming module is put into operation, and blows hot air into the reactor enclosure to buffer the phenomenon of temperature shock when the reactor is cut out; the programming module of the electromagnetic speed-regulating motor is based on programmable logicThe variable quantity of current represented by the digital signal output by the control device 3 automatically adjusts the electromagnetic speed-regulating motor 10 to change the quantity of air sucked by the air inlet and the variable quantity of currentAnd the motor speedIn a linear relationship, can be represented as. The function output module 20 executes the control command judged by the programmable module 19, so that the wind shield 6, the high-power heating wire 9 and the electromagnetic speed regulating motor 10 perform corresponding actions.
Claims (4)
1. An automatic feedback control system for buffering sudden temperature change of a dry-type reactor is characterized by being formed by sequentially connecting a state trigger source (2), a programmable logic control device (3) and an axial-flow fan body (1);
the fan body (1) is composed of a distributed fan (4) and a support device (5) arranged at the bottom of the distributed fan (4), and the distributed fan (4) is fixed on the support device (5); the distributed fan is composed of a shell (12), a wind shield (6) arranged at an air outlet at the top of the shell (12), an automatic control spring (7) arranged at the upper part of a mica sheet (8) and connected with the wind shield (6), a high-power heating wire (9) arranged inside the mica sheet (8), a support column connected with the lower part of the mica sheet (8) and the bottom of the shell (12), an electromagnetic speed regulating motor (10) arranged on the support column, fan blades (11) arranged at the shaft end of the electromagnetic speed regulating motor (10), an air hole is formed in the bottom of the mica sheet (8), a gap is reserved between the bottom of the shell (12) and a support device (5), and an air inlet is formed in the bottom of the shell (12) of the distributed fan (;
the state trigger source (2) is composed of an AD conversion module (14), a state judgment module (15), a signal output module (16) and a power supply module (17); the power module (17), the self-contained CT current sensor of the dry-type reactor, the AD conversion module (14), the state judgment module (15) and the signal output module (16) are sequentially connected;
the programmable logic control device (3) is formed by sequentially connecting a signal input module (18), a PLC programmable module (19) and a function output module (20);
a signal output module (16) of the state trigger source (2) is connected with a signal input module (18) of the programmable logic control device (3), and a function output module (20) of the programmable logic control device (3) is respectively connected with a wind shield (6) of a fan, a high-power electric heating wire (9) and an electromagnetic speed regulating motor (10).
2. The automatic feedback control system for buffering the temperature shock of the dry-type reactor according to claim 1, wherein the fan body is distributed 1 m below the dry-type reactor, the number of the distributed fans (4) is six, and each fan is respectively arranged in six enclosed areas formed by dividing the current-collecting row and fixed on the support device (5).
3. The automatic feedback control system for the temperature shock of the buffer dry type reactor according to claim 1, wherein the shell (12) is made of cold-rolled iron plate material and is designed in a cylindrical shape.
4. The automatic feedback control system for buffering temperature shock of a dry-type reactor according to claim 1, characterized in that the high power heating wire (9) is designed in a spiral shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410551876.5A CN104267662B (en) | 2014-10-17 | 2014-10-17 | Automatic feedback control system for temperature shock of buffering dry type electric reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410551876.5A CN104267662B (en) | 2014-10-17 | 2014-10-17 | Automatic feedback control system for temperature shock of buffering dry type electric reactor |
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| CN104267662A true CN104267662A (en) | 2015-01-07 |
| CN104267662B CN104267662B (en) | 2017-01-25 |
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| CN201410551876.5A Active CN104267662B (en) | 2014-10-17 | 2014-10-17 | Automatic feedback control system for temperature shock of buffering dry type electric reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114720505A (en) * | 2022-06-07 | 2022-07-08 | 广东电网有限责任公司广州供电局 | Heating and heat dissipation dual-purpose device and method for dry-type distribution transformer winding |
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