CN217445029U - Protection control system for longitudinal capacitance compensation device of industrial silicon furnace - Google Patents
Protection control system for longitudinal capacitance compensation device of industrial silicon furnace Download PDFInfo
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- CN217445029U CN217445029U CN202221091817.0U CN202221091817U CN217445029U CN 217445029 U CN217445029 U CN 217445029U CN 202221091817 U CN202221091817 U CN 202221091817U CN 217445029 U CN217445029 U CN 217445029U
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Abstract
The utility model discloses a protection control system of a longitudinal capacitance compensation device of an industrial silicon furnace, which comprises an industrial silicon furnace electrode, wherein the outer side of the industrial silicon furnace electrode is connected in series with a secondary winding of an electric furnace transformer, a high-voltage current transformer is connected in series in a primary winding of the electric furnace transformer, and a low-voltage current transformer is connected in series between the secondary winding on the electric furnace transformer and the industrial silicon furnace electrode; a medium-voltage longitudinal compensation capacitor bank is connected in series in the voltage-regulating winding (medium-voltage winding) of the electric furnace transformer; introducing current and voltage signals into the PLC; the medium-voltage capacitor longitudinal compensation device aims to solve the problems that the conventional medium-voltage capacitor longitudinal compensation device is used on an industrial silicon furnace, the medium-voltage capacitor longitudinal compensation device can frequently withdraw along with the fluctuation of the furnace condition of the electric furnace, a compensation capacitor bank withdraws at each time along with the discharge of an overvoltage ball gap, a large amount of arc light is generated, the safe operation of equipment is greatly threatened, and after the compensation device withdraws at each time, an electric furnace transformer is restarted, energy and raw materials are consumed, and the production efficiency is reduced.
Description
Technical Field
The utility model relates to an industry technical field is smelted to industrial silicon, and concrete field is a vertical capacitance compensation arrangement protection control system of industrial silicon stove.
Background
The natural power factor of the industrial silicon electric furnace is generally between 0.68 and 0.72, the factors such as energy conservation, electric furnace operation stability and the like are comprehensively considered, the power factor is most suitable between 0.88 and 0.9, and in order to achieve the purposes of energy conservation and stable electric furnace operation, reactive compensation is carried out, and the power factor of the industrial silicon electric furnace is required to be improved.
The medium-voltage capacitor longitudinal compensation technology is invented by Ukrainian, a compensation capacitor group is connected in series on a medium-voltage winding coil of a transformer, the compensation capacity is automatically adjusted steplessly along with the change of electric furnace load, and a complex compensation capacitor adjusting control system is omitted, so that the problem of over-compensation or under-compensation is fundamentally solved.
However, the medium-voltage capacitance longitudinal compensation device is used on an industrial silicon furnace, because the furnace condition of the industrial silicon furnace is relatively complex, the operation control is relatively difficult to grasp, the operation control fluctuates frequently, the medium-voltage capacitance longitudinal compensation device exits frequently along with the fluctuation of the furnace condition, each time the compensation capacitor bank exits, the overvoltage ball gap discharge is accompanied, a large amount of arc light is generated, the safe operation of equipment is greatly threatened, after each time the compensation device exits, an electric furnace transformer needs to retract to the lowest gear for restarting, the furnace condition is stabilized again, 1-2 hours is probably needed, the energy and the raw materials are wasted, and the production efficiency is low.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a vertical capacitance compensation device protection control system of industrial silicon stove to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a vertical capacitance compensation arrangement protection control system of industry silicon stove, includes industry silicon stove electrode, the outside of industry silicon stove electrode is established ties there is electric furnace transformer, it has high-voltage current transformer to establish ties in the electric furnace transformer primary winding, it has low-voltage current transformer to establish ties between secondary winding and the industry silicon stove electrode on the electric furnace transformer, it has arc suppression coil LA, circuit breaker QF and compensation capacitance current transformer to establish ties in proper order in the return circuit of voltage regulating winding under the electric furnace transformer, the outside of circuit breaker QF is established ties in proper order earlier and is had overvoltage discharge ball gap and current transformer TA1 back parallel access, the outside of arc suppression coil LA and circuit breaker QF is established ties in proper order earlier and is had parallelly access behind first fuse 1FU, first voltage transformer TVa1, second voltage transformer TVa2 and the 2FU of second fuse, the outside of first voltage transformer TVa1 and second voltage transformer a2 is established ties in proper order and is had third fuse 7FU, Voltmeter PV1 and fourth fuse 8FU, voltmeter PV 1's outside parallel has the voltage collector, high-voltage current transformer, low-voltage current transformer, compensation capacitance current transformer and voltage collector's data information all converge on the PLC controller.
Preferably, the PLC controller controls the on-off of the breaker QF through a medium-voltage breaker.
Preferably, the PLC controller is internally integrated with a time relay and externally connected with a high-voltage side voltage signal.
Preferably, the PLC is externally connected with a distributed control system DCS, and the distributed control system DCS is used for spark and overvoltage alarm.
Preferably, a first capacitor Ca65 and a second capacitor Ca1 are connected in parallel between the arc suppression coil LA and the circuit breaker QF, and the compensation capacitor current transformer, respectively.
Preferably, a first isolating switch QSa is connected in parallel between the compensation capacitance current transformer and the electric furnace transformer, and a second isolating switch QS1 is connected in series between the positive pole and the negative pole of the electric furnace transformer.
Preferably, a first voltage relay KVa1 is connected in parallel to the outside of the first voltage transformer TVa1 and the third fuse 7FU, and a second voltage relay KVa2 is connected in parallel to the outside of the second voltage transformer TVa2 and the fourth fuse 8 FU.
Preferably, a third voltage relay KVa3 is connected in parallel between the first voltage relay KVa1 and the second voltage relay KVa2 and the voltmeter PV 1.
Compared with the prior art, the beneficial effects of the utility model are that:
the method comprises the steps that the voltage of a capacitor end connected in series in a voltage regulating winding (namely a medium-voltage winding) of an electric furnace transformer is induced through a high-voltage current transformer, a low-voltage current transformer, a compensation capacitor current transformer and a voltage collector, data are uploaded into a PLC (programmable logic controller), and the data are compared with set parameters to carry out internal circuit control; when the industrial silicon furnace condition is small in fluctuation, the voltage of the capacitor end is increased and is not enough to enable the overvoltage relay to be started or the overvoltage relay is started and the delay time of the time relay is not up, the overvoltage discharging ball gap discharges to enable the voltage of the capacitor end to be reduced and tend to be stable, the voltage relay returns, after the industrial silicon furnace condition is short in fluctuation, the furnace condition tends to be stable, and the industrial silicon furnace continues to operate to reduce the instantaneous quit times of the capacitor due to the short-time fluctuation of the industrial silicon furnace condition; the production of the industrial silicon furnace is stabilized, and the production efficiency and the yield of the industrial silicon are improved;
and a DCS system is provided, all signals are transmitted into the DCS system, and when an abnormality occurs, the DCS gives an alarm to inform maintenance personnel to check.
Drawings
FIG. 1 is a schematic diagram of the operation of the present invention;
FIG. 2 is a schematic diagram of a PLC controller according to the present invention;
FIG. 3 is a DCS alarm control schematic diagram of the present invention;
fig. 4 is a schematic diagram of the control program of the PLC controller of the present invention.
In the figure: 1-industrial silicon furnace electrode, 2-electric furnace transformer, 3-high voltage current transformer, 4-low voltage current transformer, 5-compensation capacitance current transformer, 6-overvoltage discharge spherical gap, 7-voltage collector, 8-PLC controller, 9-medium voltage circuit breaker and 10-distributed control system DCS.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-4, the present invention provides a technical solution: a protection control system of an industrial silicon furnace longitudinal capacitance compensation device comprises an industrial silicon furnace electrode 1, wherein an electric furnace transformer 2 is connected in series on the outer side of the industrial silicon furnace electrode 1, a high-voltage current transformer 3 is connected in series in a primary winding of the electric furnace transformer 2, a low-voltage current transformer 4 is connected in series between a secondary winding of the electric furnace transformer 2 and the industrial silicon furnace electrode 1, an arc suppression coil LA, a circuit breaker QF and a compensation capacitance current transformer 5 are sequentially connected in series in a loop of a voltage reduction winding (namely a medium-voltage winding) of the electric furnace transformer 2, an overvoltage discharge ball gap 6 and a current transformer TA1 are sequentially connected in series on the outer side of the circuit breaker QF and then are connected in parallel, a first fuse 1FU, a first voltage transformer TVa1, a second voltage transformer TVa2 and a second fuse 2 are sequentially connected in series on the outer sides of the arc suppression coil LA and the circuit breaker QF and the first fuse 7FU, a third fuse 7 and a second fuse 2 are sequentially connected in series, Voltmeter PV1 and fourth fuse 8FU, voltmeter PV 1's the outside is parallelly connected with voltage collector 7, high-voltage current transformer 3, low-voltage current transformer 4, the data message of compensation electric capacity current transformer 5 and voltage collector 7 all converges on PLC controller 8, the realization detects electric furnace transformer high pressure side current signal induction, low pressure side current signal induction, condenser compensation electric capacity current signal induction detects, condenser compensation voltage signal carries out induction detection, and upload to the PLC controller in with data, and analyze data, handle, the realization detects electric furnace transformer secondary winding internal voltage, and carry out inner circuit control with the set parameter contrast.
Specifically, the PLC 8 controls the on-off of the breaker QF through the medium-voltage breaker 9 to control the breaker QF to be switched on, the capacitor bank is in short circuit discharge through the arc suppression coil LA and the breaker QF in an electric shock mode, and the capacitor bank quits operation.
Specifically, a time relay is integrated in the PLC 8 to realize the delay control of the voltage relay; and a high-voltage side voltage signal is externally connected to realize the introduction of the voltage data of the high-voltage side of the electric furnace transformer.
Specifically, the PLC controller 8 is externally connected with a distributed control system DCS10, the distributed control system DCS10 is used for spark discharge, compensation capacitor overcurrent and overvoltage alarm, when abnormity occurs, the DCS sends out an alarm to inform maintenance personnel to check, and timely re-operation of the industrial silicon furnace is guaranteed.
Specifically, a first capacitor Ca65 and a second capacitor Ca1 are respectively connected in parallel between the arc suppression coil LA and the circuit breaker QF and the compensation capacitor current transformer 5, so that the longitudinal compensation of the medium-voltage capacitor is realized, and a complicated compensation capacitor adjustment control system is omitted, thereby fundamentally solving the problem of over-compensation or under-compensation.
Specifically, a first isolating switch QSa is connected in parallel between the compensation capacitance current transformer 5 and the electric furnace transformer 2, and a second isolating switch QS1 is connected in series between the anode and the cathode of the electric furnace transformer 2, so that on-off control of an internal circuit is facilitated.
Specifically, a first voltage relay KVa1 is connected in parallel to the outer sides of the first voltage transformer TVa1 and the third fuse 7FU, and a second voltage relay KVa2 is connected in parallel to the outer sides of the second voltage transformer TVa2 and the fourth fuse 8 FU; and a third voltage relay KVa3 is connected in parallel between the first voltage relay KVa1 and the second voltage relay KVa2 and the voltmeter PV1, so that the inner circuit is protected from overcurrent.
The working principle is as follows: see fig. 1, the utility model discloses utilize high-voltage current transformer 3 to carry out the induction of electric furnace transformer 2 high-pressure side current signal and detect, utilize low-voltage current transformer 4 to carry out induction of electric furnace transformer 2 low-voltage side current signal and detect, utilize compensation electric capacity current transformer 5 to the electric capacity group (constitute by first electric capacity Ca65 and second electric capacity Ca 1) compensation electric capacity current signal induction detection, utilize voltage collector 7 to carry out induction detection to electric capacity group compensation voltage signal, and pass to PLC controller 8 in with data, and analyze data, handle, the realization detects electric furnace transformer 2 voltage regulation winding (be medium voltage coil) internal voltage, and carry out inner circuit control with the settlement parameter contrast.
After the system is put into operation, when the industrial silicon furnace condition fluctuates greatly for a long time, the short network generates high harmonics, the high voltage is induced to the middle voltage coil, the two ends of the capacitor bank also induce high voltage, at the moment, when the terminal voltage rises to a certain value, the voltage relay is started, the relay KVa3 is started through time relay delay, signals are transmitted to the PLC controller 8, the PLC controller 8 carries out logic judgment, a closing command is sent to the middle voltage circuit breaker 9, the circuit breaker QF is closed, the capacitor bank is subjected to electric shock through an arc suppression coil LA and the circuit breaker QF to carry out short circuit discharge, and the capacitor bank quits operation.
When the industrial silicon furnace condition is small in fluctuation, the end voltage of the capacitor bank is increased and is not enough to start the overvoltage relay or the overvoltage relay is started and the delay time of the relay is not up after the time, at the moment, the overvoltage discharge ball gap 6 discharges, so that the end voltage of the capacitor bank is reduced and tends to be stable, the voltage relays KVa1, KVa2 and KVa3 return, the furnace condition tends to be stable after the industrial silicon furnace condition is short in fluctuation, the industrial silicon furnace continues to operate, the instant quit times of the capacitor due to the short-time fluctuation of the industrial silicon furnace condition are reduced, the industrial silicon furnace production is stabilized, and the industrial silicon production efficiency and yield are improved;
referring to fig. 2, 3 and 4, the system is provided with a DCS system, all signals are transmitted into the DCS system, and when an abnormality (such as spark discharge and overvoltage) occurs, the DCS sends out an alarm to inform maintenance personnel to perform inspection.
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 (8)
1. The utility model provides a vertical capacitive compensation device protection control system of industrial silicon stove, includes industrial silicon stove electrode (1), its characterized in that: the outside of industry silicon furnace electrode (1) is established ties there is electric furnace transformer (2) in the series, it has high-voltage current transformer (3) to establish ties in electric furnace transformer (2) primary winding, it has low-voltage current transformer (4) to establish ties between electric furnace transformer (2) last secondary winding and industry silicon furnace electrode (1), it has arc suppression coil LA, circuit breaker QF and compensation capacitor current transformer (5) to establish ties in proper order in the return circuit of voltage reduction winding under electric furnace transformer (2), the outside of circuit breaker QF is established ties in proper order earlier and is had overvoltage discharge ball gap (6) and current transformer TA1 back parallel access, the outside of arc suppression coil LA and circuit breaker QF is established ties in proper order earlier and is had parallelly access behind first fuse 1FU, first voltage transformer TVa1, second voltage transformer TVa2 and the second fuse 2FU, the outside of first voltage transformer 1 and second voltage transformer TVa2 is established ties in proper order and has third fuse 7FU, Voltmeter PV1 and fourth fuse 8FU, voltmeter PV 1's the outside is parallelly connected with voltage collector (7), the data message of high-voltage current transformer (3), low-voltage current transformer (4), compensation capacitance current transformer (5) and voltage collector (7) all converge on PLC controller (8).
2. The industrial silicon furnace longitudinal capacitance compensation device protection control system as claimed in claim 1, characterized in that: and the PLC (8) controls the on-off of the breaker QF through the medium-voltage breaker (9).
3. The protection control system for the longitudinal capacitance compensation device of the industrial silicon furnace according to claim 1, characterized in that: and a time relay is integrated in the PLC (8), and a high-voltage side voltage signal is externally connected.
4. The industrial silicon furnace longitudinal capacitance compensation device protection control system as claimed in claim 1, characterized in that: the PLC controller (8) is externally connected with a distributed control system DCS (10), and the distributed control system DCS (10) is used for spark discharge, compensating capacitor overcurrent and overvoltage alarm.
5. The industrial silicon furnace longitudinal capacitance compensation device protection control system as claimed in claim 1, characterized in that: and a first capacitor Ca65 and a second capacitor Ca1 are respectively connected in parallel between the arc suppression coil LA, the breaker QF and the compensation capacitor current transformer (5).
6. The industrial silicon furnace longitudinal capacitance compensation device protection control system as claimed in claim 1, characterized in that: a first isolating switch QSa is connected in parallel between the compensation capacitor current transformer (5) and the electric furnace transformer (2), and a second isolating switch QS1 is connected in series between the positive pole and the negative pole of the electric furnace transformer (2).
7. The industrial silicon furnace longitudinal capacitance compensation device protection control system as claimed in claim 1, characterized in that: a first voltage relay KVa1 is connected in parallel to the outer sides of the first voltage transformer TVa1 and the third fuse 7FU, and a second voltage relay KVa2 is connected in parallel to the outer sides of the second voltage transformer TVa2 and the fourth fuse 8 FU.
8. The protection control system of the industrial silicon furnace longitudinal capacitance compensation device according to claim 7, characterized in that: and a third voltage relay KVa3 is connected in parallel between the first voltage relay KVa1 and the second voltage relay KVa2 and the voltmeter PV 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221091817.0U CN217445029U (en) | 2022-05-09 | 2022-05-09 | Protection control system for longitudinal capacitance compensation device of industrial silicon furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221091817.0U CN217445029U (en) | 2022-05-09 | 2022-05-09 | Protection control system for longitudinal capacitance compensation device of industrial silicon furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217445029U true CN217445029U (en) | 2022-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221091817.0U Active CN217445029U (en) | 2022-05-09 | 2022-05-09 | Protection control system for longitudinal capacitance compensation device of industrial silicon furnace |
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| Country | Link |
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| CN (1) | CN217445029U (en) |
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2022
- 2022-05-09 CN CN202221091817.0U patent/CN217445029U/en active Active
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