CN219627360U - Control system of aluminum electrolysis compensation bus power supply rectifier unit - Google Patents
Control system of aluminum electrolysis compensation bus power supply rectifier unit Download PDFInfo
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- CN219627360U CN219627360U CN202320139786.XU CN202320139786U CN219627360U CN 219627360 U CN219627360 U CN 219627360U CN 202320139786 U CN202320139786 U CN 202320139786U CN 219627360 U CN219627360 U CN 219627360U
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Abstract
The utility model provides a control system of an aluminum electrolysis compensation bus power supply rectifier unit, and belongs to the field of power control. The control system is characterized by further comprising a trip branch circuit for generating trip protection with a power supply bus power supply rectifier unit, one end of the trip branch circuit is connected with one end of a normally open switch of the breaker QF, the other end of the trip branch circuit is connected with a positive power supply electrode, the other end of the normally open switch of the breaker QF is connected with one end of a trip coil TQ of the breaker QF, and the other end of the trip coil TQ of the breaker QF is connected with a negative power supply electrode. According to the utility model, the power supply bus power supply rectifying unit and the compensation bus power supply rectifying unit are subjected to jump control, so that the tripping and shutdown of the compensation bus power supply rectifying unit are realized after the power supply bus power supply rectifying unit is powered off, and the operation safety of the compensation bus power supply rectifying unit is improved.
Description
Technical Field
The utility model belongs to the field of power control, and particularly relates to a control system of an aluminum electrolysis compensation bus power supply rectifier unit.
Background
With the improvement of current intensity, the difficulty of the configuration of the bus of the electrolytic cell is gradually increased, and in order to better solve the symmetry and stability of the distribution of the magnetic field of the electrolytic cell, a special compensation bus is arranged at the flue end and the aluminum outlet end of the aluminum cell simultaneously or on one side for balancing the distribution of the magnetic field of the electrolytic cell, so that the power supply bus is put into operation firstly and then put into operation when the compensation bus is put into operation, and the power supply bus is put out of operation when the compensation bus is put out of operation.
In the prior art, the compensation bus power supply rectifying unit and the power supply bus power supply rectifying unit are controlled independently, and under normal conditions, the compensation bus and the electrolytic cell power supply bus run simultaneously and can be regarded as two coils which are not connected with each other and are close to each other, and mutual inductance exists between the coils. At this time, if the power supply bus of the electrolytic cell suddenly stops, the magnetic field balance is broken. The electromagnetic change of the energy of the power supply bus of the electrolytic cell causes the generation of the induced electromotive force in the compensation bus, and according to the principle of the induced electromotive force, the faster the current change time is, the larger the induced electromotive force is, and the generated induced voltage is also increased at a high speed, so that a discharge phenomenon is formed at the position (between electric elements of the rectifier cabinet) where the gap of the circuit of the compensation bus is minimum, and arc discharge and AC/DC short circuit accidents are caused.
Disclosure of Invention
The utility model aims to solve the problems in the prior art, and provides a control system of an aluminum electrolysis compensation bus power supply rectifier unit, which aims to solve the technical problems that: how to improve the operation safety of the compensating bus power supply rectifier unit.
The aim of the utility model can be achieved by the following technical scheme: the control system of the aluminum electrolysis compensation bus power supply rectifier unit comprises a breaker QF with a tripping coil TQ, and is characterized by further comprising a tripping branch circuit for generating tripping protection with the power supply bus power supply rectifier unit, wherein one end of the tripping branch circuit is connected with one end of a normally open switch of the breaker QF, the other end of the tripping branch circuit is connected with a power anode, the other end of the normally open switch of the breaker QF is connected with one end of a tripping coil TQ of the breaker QF, and the other end of the tripping coil TQ of the breaker QF is connected with a power cathode.
When the circuit breaker QF is powered on, a normally open switch of the circuit breaker QF is closed, the compensation bus power supply rectifier unit starts to operate, meanwhile, a front-stage preparation is made for tripping of the compensation bus power supply rectifier unit, after the power supply bus power supply rectifier unit trips and stops running, a tripping branch is conducted, a tripping coil TQ of the circuit breaker QF is powered on, the normally open switch of the circuit breaker QF is disconnected, and the compensation bus power supply rectifier unit trips and stops running. The power supply bus power supply rectifying unit and the compensation bus power supply rectifying unit are subjected to jump control, so that the compensation bus power supply rectifying unit trips and stops operating after the power supply bus power supply rectifying unit is powered off, the compensation bus and the power supply bus are simultaneously out of voltage, no mutual inductance phenomenon exists between the power supply bus and the compensation bus, the occurrence of induced voltage is avoided, the discharge phenomenon is prevented from being formed, arc discharge and AC/DC short-circuit accidents are caused, and the operation safety of the compensation bus power supply rectifying unit is improved.
In the control system of the aluminum electrolysis compensation bus power supply rectifier unit, the jump-connection branch comprises a plurality of normally closed switches of the power supply bus power supply rectifier unit high-voltage switches, and the plurality of normally closed switches of the power supply bus power supply rectifier unit high-voltage switches are connected in series to form the jump-connection branch. When the power supply bus power supply rectifier unit operates, the normally closed switch of the high-voltage switch is opened, when one or more power supply bus power supply rectifier units are overhauled and stopped, the normally closed switch of the corresponding high-voltage switch is closed, the normally closed switch of other power supply bus power supply rectifier units is still opened, the shunt branch is not conducted, the compensation bus power supply rectifier unit can still continue to operate, when all the power supply bus power supply rectifier unit high-voltage switches trip, the normally closed switch of the corresponding high-voltage switch is closed, the shunt branch is conducted at the moment, the tripping coil TQ of the circuit breaker QF is powered on, the normally open switch of the circuit breaker QF is opened, the tripping and stopping of the compensation bus power supply rectifier unit, the voltage loss of the compensation bus is avoided, and the series connection mode can not cause the error tripping condition of the compensation bus power supply rectifier unit, so that the control is more accurate.
In the control system of the aluminum electrolysis compensation busbar power supply rectifier unit, the breaker QF is provided with the switching-on coil HQ, one end of the normally closed switch of the breaker QF is connected with one end of the switching-on coil HQ of the breaker QF, the other end of the normally closed switch of the breaker QF is connected with the positive electrode of the power supply, and the other end of the switching-on coil HQ of the breaker QF is connected with the negative electrode of the power supply.
In the control system of the aluminum electrolysis compensation bus power supply rectifier unit, the control system further comprises an air switch 1ZK, wherein the air switch 1ZK is provided with an upper terminal A1, an upper terminal A2, a lower terminal B1 and a lower terminal B2, the upper terminal A1 of the air switch 1ZK is connected with a positive power supply electrode, the upper terminal A2 of the air switch 1ZK is connected with a negative power supply electrode, the lower terminal B2 of the air switch 1ZK is connected with a closing coil HQ of a circuit breaker QF, and the lower terminal B1 of the air switch 1ZK is connected between a normally closed switch of the circuit breaker QF and the positive power supply electrode. The air switch 1ZK is a two-phase air switch.
In the control system of the aluminum electrolysis compensation busbar power supply rectifier unit, the control system further comprises a remote control change-over switch QK with a local switch JQK and a manual change-over switch KK with a switching-on switch HKK, the local switch JQK of the remote control change-over switch QK and the switching-on switch HKK of the manual change-over switch KK are further connected in series between the normally closed switch of the circuit breaker QF and the lower terminal B1 of the air switch 1ZK in sequence, and a switching-on signal switch YX of the compensation unit rectifier control cabinet is connected between the switching-on switch HKK of the manual change-over switch KK and the normally closed switch of the circuit breaker QF. The contacts (1) and (2) of the remote control change-over switch QK form an on-site switch JQK of the remote control change-over switch QK, the contacts (1) and (2) of the manual change-over switch KK form a closing switch HKK of the manual change-over switch KK, when an allowable closing signal of the compensation unit rectification control cabinet is received, the allowable closing signal switch YX is closed, the remote control change-over switch QK is converted into an on-site switch JQK to be controlled, and a closing coil HQ of the circuit breaker QF is powered by an electric compensation bus to supply the rectification unit to operate after manual closing.
In the control system of the aluminum electrolysis compensation busbar power supply rectifier unit, the control system further comprises a jump prevention relay KO, wherein a normally closed switch of the jump prevention relay KO is connected in series between a normally closed switch of the circuit breaker QF and a permitted switch-on switch YX of the compensation busbar power supply rectifier unit, one end of a normally open switch of the jump prevention relay KO is connected with one end of a coil of the jump prevention relay KO, the other end of the normally open switch of the jump prevention relay KO is connected to a connecting line of the normally closed switch of the jump prevention relay KO and the permitted switch-on switch YX of the compensation busbar power supply rectifier unit, the other end of the coil of the jump prevention relay KO is connected to a connecting line of a switch-on coil HQ of the circuit breaker QF and a lower terminal B2 of the air switch 1ZK, a resistor R0 is connected in series between the normally open switch of the jump prevention relay KO and the coil of the jump prevention relay KO, and the normally open switch of the circuit breaker QF is connected in parallel with the normally open switch of the jump prevention relay KO and is connected with the resistor R0 in series. When the manual control change-over switch KK is switched to the closing switch HKK, the closing coil HQ of the breaker QF is electrified, the coil of the anti-tripping relay KO is electrified, the normally closed switch of the anti-tripping relay KO is opened, the normally open switch is closed, a closed loop is cut off, re-closing is prevented, and the breaker QF is effectively protected.
In the control system of the aluminum electrolysis compensation bus power supply rectifier unit, the control system further comprises a miniature comprehensive protection device, the remote control change-over switch QK is further provided with a remote switch YQK, one end of the remote switch YQK of the remote control change-over switch QK is connected with a terminal B09 of the miniature comprehensive protection device, the other end of the remote control change-over switch QK is connected to a connection contact of an on-site switch JQK of the remote control change-over switch QK and a lower terminal B1 of the air switch 1ZK, a switch OUT4 is connected between the terminal B09 of the miniature comprehensive protection device and a terminal B08 of the miniature comprehensive protection device, and the terminal B08 of the miniature comprehensive protection device is connected to a connection line of a closing switch HKK of the manual change-over switch KK and an allowable closing signal switch YX of the compensation unit rectifier control cabinet. The contacts (3) and (4) of the remote control change-over switch QK form a remote switch YQK of the remote control change-over switch QK, when the remote control change-over switch QK is switched to the remote switch YQK and the switch OUT4 is closed, current flows in from a terminal B09 of the miniature comprehensive protection device and flows OUT from a terminal B08 of the miniature comprehensive protection device, and remote control switching-on is carried OUT to enable a switching-on coil HQ of the circuit breaker QF to obtain electricity to compensate the bus power supply rectifier unit to operate.
In the control system of the aluminum electrolysis compensation bus power supply rectifier unit, a switch OUT5 is connected between a terminal B10 of the miniature comprehensive protection device and a terminal B09 of the miniature comprehensive protection device, and the terminal B10 of the miniature comprehensive protection device is connected to a connecting line of a normally closed switch of a high-voltage switch of the power supply bus power supply rectifier unit and a normally open switch of the circuit breaker QF. When the remote control change-over switch QK is switched to the remote switch YQK during power on, the switch OUT5 is closed, current flows in from the terminal B09 of the miniature comprehensive protection device and flows OUT from the terminal B10 of the miniature comprehensive protection device, remote control tripping is carried OUT to enable the tripping coil HQ of the circuit breaker QF to be electrified so as to enable the normally open switch of the circuit breaker QF to be disconnected, the compensation bus power supply rectifier unit is stopped, the compensation bus is OUT of voltage, and the remote control protection of the compensation bus power supply rectifier unit is met.
In the control system of the aluminum electrolysis compensation bus power supply rectifier unit, the manual change-over switch KK is further provided with a switching-off switch FKK, one end of a tripping switch FKK of the manual change-over switch KK is connected with a lower terminal B1 of the air switch 1ZK, and the other end of the switching-off switch TKK of the manual change-over switch KK is connected with a connecting line of a normally closed switch of a high-voltage switch of the power supply bus power supply rectifier unit and a normally open switch of the circuit breaker QF. The manual transfer switch KK contacts (3) and (4) form a switching-off switch FKK of the manual transfer switch KK, when the compensation bus power supply rectifier unit operates, the switching-off coil TQ of the circuit breaker QF is powered on when the manual transfer switch KK is converted into the switching-off switch FKK, the normally open switch of the circuit breaker QF is disconnected, the compensation bus power supply rectifier unit stops running, the compensation bus loses voltage, and the manual trip protection compensation bus power supply rectifier unit is performed.
In the control system of the aluminum electrolysis compensation bus power supply rectifier unit, the system further comprises an intermediate relay KA, one end of a transformer thermal protection switch is connected to one end of a coil of the intermediate relay KA, the other end of the coil of the intermediate relay KA is connected with a lower terminal B2 of the air switch 1ZK, the other end of the transformer thermal protection switch is connected with a lower terminal B1 of the air switch 1ZK, one end of a normally open switch of the intermediate relay KA is connected with one end of a switching-off switch FKK of the manual switching-off switch KK, and the other end of the normally open switch of the intermediate relay KA is connected with the other end of a switching-off switch FKK of the manual switching-off switch KK. When the transformer is closed due to high temperature, the coil of the intermediate relay KA is powered on, the normally open switch of the intermediate relay KA is closed, the tripping coil TQ of the breaker QF is powered on, the normally open switch of the breaker QF is opened, the compensation bus power supply rectifier unit is shut down, the compensation bus is out of voltage, and the compensation bus power supply rectifier unit is protected.
Compared with the prior art, the utility model has the beneficial effects that: according to the utility model, after the normally closed switches of all the power supply bus power supply rectifying units are connected in series, the normally closed switches of the circuit breaker QF and the normally open switches of the circuit breaker QF are connected in series, so that the power supply bus power supply rectifying units and the compensation bus power supply rectifying units are connected in series, when the power supply bus stops operating and loses voltage, the tripping coils TQ of the circuit breaker QF of the compensation bus power supply rectifying units are powered on, so that the compensation bus and the power supply bus lose voltage simultaneously, no mutual inductance phenomenon exists between the power supply bus and the compensation bus, thereby avoiding the occurrence of induced voltage, preventing arcing and AC/DC short-circuit accidents, and improving the operation safety of the compensation bus power supply rectifying units.
Drawings
Fig. 1 is a wiring diagram of the present utility model.
1, a joint jump branch; 2. a compensation unit rectification control cabinet; 3. a miniature comprehensive protection device; 4. a compensation unit rectifying cabinet; 5. a transformer.
Detailed Description
The following is a specific embodiment of the present utility model and a technical solution of the present utility model is further described with reference to the accompanying drawings, but the present utility model is not limited to the following embodiment.
As can be seen from fig. 1, a control system of an aluminum electrolysis compensation bus power supply rectifier unit comprises a circuit breaker QF, a miniature comprehensive protection device 3, an anti-tripping relay KO and an air switch 1ZK, wherein the circuit breaker QF is provided with a closing coil HQ and a tripping coil TQ, and the control system is provided with a manual closing branch, a remote control tripping branch, a manual tripping branch, a transformer 5 super Wen Tiaozha branch and a tripping branch 1.
One end of a normally closed switch of the breaker QF is connected with one end of a closing coil HQ of the breaker QF, the other end of the normally closed switch of the breaker QF is connected with a positive power supply electrode, and the other end of the closing coil HQ of the breaker QF is connected with a negative power supply electrode. The air switch 1ZK, the air switch 1ZK has upper terminal A1, upper terminal A2, lower terminal B1 and lower terminal B2, the upper terminal A1 of air switch 1ZK connects the positive pole of the power, the upper terminal A2 of air switch 1ZK connects the negative pole of the power, the lower terminal B2 of air switch 1ZK connects the closing coil HQ of breaker QF, the lower terminal B1 of air switch 1ZK connects between the normally closed switch of breaker QF and the positive pole of the power connection.
The jump branch 1 is used for generating jump protection by the compensation bus power supply rectifier unit and the power supply bus power supply rectifier unit, one end of the jump branch 1 is connected with one end of a normally open switch of the breaker QF, the other end of the jump branch 1 is connected with the positive electrode of a power supply, the other end of the normally open switch of the breaker QF is connected with one end of a tripping coil TQ of the breaker QF, and the other end of the tripping coil TQ of the breaker QF is connected with the negative electrode of the power supply through an air switch 1 ZK. The jump branch 1 comprises a plurality of normally closed switches of high-voltage switches of the power supply bus power supply rectifier unit, and the normally closed switches of the high-voltage switches of the power supply bus power supply rectifier unit are connected in series to form the jump branch 1. When the power supply bus power supply rectifier unit operates, the normally closed switch of the high-voltage switch is opened, when one or more power supply bus power supply rectifier units are overhauled and stopped, the normally closed switch of the corresponding high-voltage switch is closed, the normally closed switch of other power supply bus power supply rectifier units is still opened, the shunt branch is not conducted, the compensation bus power supply rectifier unit can still continue to operate, when all the power supply bus power supply rectifier unit high-voltage switches trip, the normally closed switch of the corresponding high-voltage switch is closed, the shunt branch is conducted at the moment, the tripping coil TQ of the circuit breaker QF is powered on, the normally open switch of the circuit breaker QF is opened, the tripping and stopping of the compensation bus power supply rectifier unit, the voltage loss of the compensation bus is avoided, and the series connection mode can not cause the error tripping condition of the compensation bus power supply rectifier unit, so that the control is more accurate.
The system also comprises a remote control change-over switch QK with a remote switch YQK and an in-situ switch JQK, and a manual change-over switch KK with a switch-on switch HKK and a switch-off switch FKK, wherein the contacts (3) (4) of the manual change-over switch KK form a switch-off switch FKK of the manual change-over switch KK, the contacts (1) (2) of the manual change-over switch KK form a switch-on switch HKK of the manual change-over switch KK, the contacts (1) (2) of the remote control change-over switch QK form an in-situ switch JQK of the remote control change-over switch QK, and the contacts (3) (4) of the remote control change-over switch QK form the remote control change-over switch YQK of the remote control change-over switch QK
The normal close switch of the breaker QF and the lower terminal B1 of the air switch 1ZK are also sequentially connected in series with a local switch JQK of the remote control change-over switch QK and a closing switch HKK of the manual change-over switch KK, and an allowable closing signal switch YX of the compensation unit rectification control cabinet 2 is connected between the closing switch HKK of the manual change-over switch KK and the normal close switch of the breaker QF. The on-site switch JQK of the remote control change-over switch QK, the closing switch HKK of the manual change-over switch KK, the normally closed switch of the breaker QF and the closing coil HQ of the breaker QF are sequentially connected in series to form a manual closing branch, when an allowable closing signal of the compensation unit rectification control cabinet 2 is received, the signal switch YX is closed, the remote control change-over switch QK is converted into an on-site switch JQK, and after the closing switch HKK is manually closed, the closing coil HQ of the breaker QF is electrically compensated to supply power to the rectification unit.
The remote control change-over switch QK is also provided with a remote switch YQK, one end of the remote switch YQK of the remote control change-over switch QK is connected with a terminal B09 of the miniature comprehensive protection device 3, the other end of the remote control change-over switch QK is connected to a connecting contact point of a local switch JQK of the remote control change-over switch QK and a lower terminal B1 of the air switch 1ZK, a switch OUT4 is connected between the terminal B09 of the miniature comprehensive protection device 3 and a terminal B08 of the miniature comprehensive protection device 3, and the terminal B08 of the miniature comprehensive protection device 3 is connected to a connecting line of a closing switch HKK of the manual change-over switch KK and an allowable closing signal switch YX of the compensation unit rectification control cabinet 2. The remote switch YQK of the remote control change-over switch QK, the normally closed switch of the breaker QF and the closing coil HQ of the breaker QF are sequentially connected in series to form a remote control closing branch, when the remote control change-over switch QK is switched to the remote switch YQK during power on, the switch OUT4 is closed, current flows in from the terminal B09 of the miniature comprehensive protection device and flows OUT from the terminal B08 of the miniature comprehensive protection device, and remote control closing is carried OUT to enable the closing coil HQ of the breaker QF to obtain electricity to compensate the busbar to supply power to the rectifier unit to operate.
One end of a switching-off switch FKK of the manual change-over switch KK is connected with a lower terminal B1 of the air switch 1ZK, and the other end of the switching-off switch TKK of the manual change-over switch KK is connected to a connecting line of a normally closed switch of a high-voltage switch of the power supply bus power supply rectifier unit and a normally open switch of the breaker QF. The switching-off switch FKK of the manual transfer switch KK, the normally open switch of the breaker QF and the tripping coil TQ of the breaker QF are sequentially connected in series to form a manual tripping branch, when the compensation bus power supply rectifier unit operates, the switching-off coil TQ of the breaker QF is powered on when the manual transfer switch KK is converted into the switching-off switch, the normally open switch of the breaker QF is disconnected, the compensation bus power supply rectifier unit is stopped, the compensation bus is out of voltage, and the manual tripping protection compensation bus power supply rectifier unit is performed.
The switch OUT5 is connected between the terminal B10 of the micro comprehensive protection device 3 and the terminal B09 of the micro comprehensive protection device 3, the terminal B10 of the micro comprehensive protection device 3 is connected to a connecting line of a high-voltage switch normally-closed switch of a power supply bus power supply rectifier unit and a normally-open switch of a breaker QF, a remote switch YQK of a remote switch QK, the normally-open switch of the breaker QF and a tripping coil TQ of the breaker QF are connected in series to form a remote tripping branch, when the remote switch QK is switched to the remote switch YQK when the power is on, the switch OUT5 is closed, current flows from the terminal B09 of the micro comprehensive protection device and flows OUT from the terminal B10 of the micro comprehensive protection device, remote tripping is carried OUT to enable the tripping coil HQ of the breaker QF to be electrified, so that the normally-open switch of the breaker QF is disconnected, the compensation bus power supply rectifier unit is stopped, and the loss of the bus voltage is compensated, and the remote control protection compensation bus power supply rectifier unit is met.
One end of a coil of the intermediate relay KA is connected with one end of a thermal protection switch of the transformer 5, the other end of the coil of the intermediate relay KA is connected with a lower terminal B2 of the air switch 1ZK, the other end of the thermal protection switch of the transformer 5 is connected with a lower terminal B1 of the air switch 1ZK, one end of a normally open switch of the intermediate relay KA is connected with one end of a brake separating switch FKK of the manual change-over switch KK, and the other end of the normally open switch of the intermediate relay KA is connected with the other end of the brake separating switch FKK of the manual change-over switch KK. When the thermal protection switch of the transformer 5 is closed due to high temperature, the coil of the intermediate relay KA is powered on, the normally open switch of the intermediate relay KA is closed, the tripping coil TQ of the circuit breaker QF is powered on, the normally open switch of the circuit breaker QF is opened, the compensation bus power supply rectifier unit is stopped, the compensation bus is out of voltage, and the compensation bus power supply rectifier unit is protected.
In order to further ensure the safe operation of the compensating bus power supply rectifier unit, the control system is also provided with two protection tripping standby branches, one protection tripping standby branch consists of an air switch 1ZK, a switch OUT2 connected between a terminal B04 of the miniature comprehensive protection device and a terminal B05 of the miniature comprehensive protection device, a normally open switch of a breaker QF and a tripping coil TQ of the breaker QF, and the other protection tripping standby branch consists of the air switch 1ZK, a switch OUT3 connected between a terminal B07 of the miniature comprehensive protection device and a terminal B06 of the miniature comprehensive protection device, a normally open switch of the breaker QF and a tripping coil TQ of the breaker QF.
In order to protect the circuit breaker QF, the utility model is also provided with a jump-preventing relay KO, a normally closed switch of the jump-preventing relay KO is connected in series between the normally closed switch of the circuit breaker QF and a permissible closing switch YX of the compensating unit rectifying control cabinet 2, one end of a normally open switch of the jump-preventing relay KO is connected with one end of a coil of the jump-preventing relay KO, the other end of the normally open switch of the jump-preventing relay KO is connected on a connecting line of the normally closed switch of the jump-preventing relay KO and the permissible closing switch YX of the compensating unit rectifying control cabinet 2, the other end of the coil of the jump-preventing relay KO is connected on a connecting line of a closing coil HQ of the circuit breaker QF and a lower terminal B2 of the air switch 1ZK, a resistor R0 is connected in series between the normally open switch of the jump-preventing relay KO and the normally open switch of the jump-preventing relay KO, and the normally open switch of the jump-preventing relay KO is connected in parallel and in series with the resistor R0. When the manual control change-over switch KK is switched to the closing switch HKK, the closing coil HQ of the breaker QF is electrified, the coil of the anti-tripping relay KO is electrified, the normally closed switch of the anti-tripping relay KO is opened, the normally open switch is closed, a closed loop is cut off, re-closing is prevented, and the breaker QF is effectively protected.
In the manual switching-on branch and the remote control switching-on branch, a breaker QF handcart working position switch YW is connected in series between an allowable switching-on switch YX of the compensation unit rectification control cabinet 2 and a normally closed switch of the anti-tripping relay KO, and in addition, an energy storage micro switch S1 is connected in series between the normally closed switch of the anti-tripping relay KO and the normally closed switch of the breaker QF. When the handcart is pushed into the experimental position, the breaker QF handcart experimental position switch SW is closed, at the moment, the breaker QF is opened and closed, the breaker QF is in a cold standby state, when the handcart is pushed into the working position, the breaker QF handcart working position switch SY is closed, the energy storage micro switch S1 is closed, and the closing principle of the energy storage micro switch S1 belongs to the prior art, and is not repeated in the embodiment.
According to the utility model, after the normally closed switches of all the power supply bus power supply rectifying units are connected in series, the normally closed switches of the circuit breaker QF and the normally open switches of the circuit breaker QF are connected in series, so that the power supply bus power supply rectifying units and the compensation bus power supply rectifying units are connected in series, when the power supply bus stops operating and loses voltage, the tripping coils TQ of the circuit breaker QF of the compensation bus power supply rectifying units are powered on, so that the compensation bus and the power supply bus lose voltage simultaneously, no mutual inductance phenomenon exists between the power supply bus and the compensation bus, thereby avoiding the occurrence of induced voltage, preventing arcing and AC/DC short-circuit accidents, and improving the operation safety of the compensation bus power supply rectifying units.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.
Claims (10)
1. The control system of the aluminum electrolysis compensation bus power supply rectifier unit comprises a breaker QF with a tripping coil TQ, and is characterized by further comprising a tripping branch (1) for generating tripping protection with the power supply bus power supply rectifier unit, wherein one end of the tripping branch (1) is connected with one end of a normally open switch of the breaker QF, the other end of the tripping branch (1) is connected with a power supply anode, the other end of the normally open switch of the breaker QF is connected with one end of the tripping coil TQ of the breaker QF, and the other end of the tripping coil TQ of the breaker QF is connected with a power supply cathode.
2. The control system of the aluminum electrolysis compensation bus power supply rectifier unit according to claim 1, wherein the jump-connection branch (1) comprises a plurality of normally closed switches of the power supply bus power supply rectifier unit high-voltage switches, and the plurality of normally closed switches of the power supply bus power supply rectifier unit high-voltage switches are connected in series to form the jump-connection branch (1).
3. The control system of an aluminum electrolysis compensation busbar power supply rectifier unit according to claim 2, wherein the breaker QF is provided with a closing coil HQ, one end of a normally closed switch of the breaker QF is connected with one end of the closing coil HQ of the breaker QF, the other end of the normally closed switch of the breaker QF is connected with a positive power supply electrode, and the other end of the closing coil HQ of the breaker QF is connected with a negative power supply electrode.
4. A control system of an aluminium electrolysis compensation busbar power supply rectifier unit according to claim 3, further comprising an air switch 1ZK, the air switch 1ZK having an upper terminal A1, an upper terminal A2, a lower terminal B1 and a lower terminal B2, the upper terminal A1 of the air switch 1ZK being connected to the positive power supply pole, the upper terminal A2 of the air switch 1ZK being connected to the negative power supply pole, the lower terminal B2 of the air switch 1ZK being connected to the closing coil HQ of the circuit breaker QF, the lower terminal B1 of the air switch 1ZK being connected between the normally closed switch of the circuit breaker QF and the positive power supply pole.
5. The control system of an aluminum electrolysis compensation busbar power supply rectifier unit according to claim 4, further comprising a remote control transfer switch QK with a local switch JQK, a manual transfer switch KK with a closing switch HKK, wherein a local switch JQK of the remote control transfer switch QK and a closing switch HKK of the manual transfer switch KK are further sequentially connected in series between a normally closed switch of the circuit breaker QF and a lower terminal B1 of the air switch 1ZK, and an allowable closing signal switch YX of the compensation unit rectification control cabinet (2) is connected between a closing switch HKK of the manual transfer switch KK and the normally closed switch of the circuit breaker QF.
6. The control system of the aluminum electrolysis compensation busbar power supply rectifier unit according to claim 5, further comprising a tripping prevention relay KO, wherein a normally closed switch of the tripping prevention relay KO is connected in series between a normally closed switch of the circuit breaker QF and a closing permission switch YX of the compensation busbar power supply rectifier unit (2), one end of a normally open switch of the tripping prevention relay KO is connected with one end of a coil of the tripping prevention relay KO, the other end of the normally open switch of the tripping prevention relay KO is connected on a connecting line of the normally closed switch of the tripping prevention relay KO and the closing permission switch YX of the compensation busbar power supply rectifier unit (2), the other end of the coil of the tripping prevention relay KO is connected on a connecting line of a closing coil HQ of the circuit breaker QF and a lower terminal B2 of the air switch 1ZK, a resistor R0 is connected between the normally open switch of the tripping prevention relay KO and the coil of the tripping prevention relay KO in series, and the normally open resistor R is connected in series with the tripping prevention relay KO in parallel.
7. The control system of an aluminum electrolysis compensation busbar power supply rectifier unit according to claim 5 or 6, further comprising a miniature integrated protection device (3), wherein the remote control transfer switch QK further comprises a remote switch YQK, one end of the remote switch YQK of the remote control transfer switch QK is connected with a terminal B09 of the miniature integrated protection device (3), the other end of the remote switch YQK is connected to a connection contact between a local switch JQK of the remote control transfer switch QK and a lower terminal B1 of the air switch 1ZK, a switch OUT4 is connected between the terminal B09 of the miniature integrated protection device (3) and a terminal B08 of the miniature integrated protection device (3), and a terminal B08 of the miniature integrated protection device (3) is connected to a connection line between a closing switch HKK of the manual transfer switch KK and a closing permission signal switch YX of the compensation unit rectification control cabinet (2).
8. The control system of the aluminum electrolysis compensation bus power supply rectifier unit according to claim 7, wherein a switch OUT5 is connected between a terminal B10 of the miniature integrated protection device (3) and a terminal B09 of the miniature integrated protection device (3), and the terminal B10 of the miniature integrated protection device (3) is connected to a connecting line of a normally closed switch of a high-voltage switch of the power supply bus power supply rectifier unit and a normally open switch of the circuit breaker QF.
9. The control system of an aluminum electrolysis compensation bus power supply rectifier unit according to claim 8, wherein the manual change-over switch KK further comprises a switch-off switch FKK, one end of a switch-off switch FKK of the manual change-over switch KK is connected to the lower terminal B1 of the air switch 1ZK, and the other end of the switch-off switch TKK of the manual change-over switch KK is connected to a connection line between a normally closed switch of a high voltage switch of the power supply bus power supply rectifier unit and a normally open switch of the circuit breaker QF.
10. The control system of an aluminum electrolysis compensation busbar power supply rectifier unit according to claim 9, further comprising an intermediate relay KA, wherein one end of a coil of the intermediate relay KA is connected with one end of a switch of a transformer (5), the other end of the coil of the intermediate relay KA is connected with a lower terminal B2 of the air switch 1ZK, the other end of the switch of the transformer (5) is connected with a lower terminal B1 of the air switch 1ZK, one end of a normally open switch of the intermediate relay KA is connected with one end of a switch-off switch FKK of the manual switch KK, and the other end of a normally open switch of the intermediate relay KA is connected with the other end of the switch-off switch FKK of the manual switch KK.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320139786.XU CN219627360U (en) | 2023-02-01 | 2023-02-01 | Control system of aluminum electrolysis compensation bus power supply rectifier unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320139786.XU CN219627360U (en) | 2023-02-01 | 2023-02-01 | Control system of aluminum electrolysis compensation bus power supply rectifier unit |
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| CN219627360U true CN219627360U (en) | 2023-09-01 |
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