CN212302232U - Electric control valve driving device with redundancy function - Google Patents
Electric control valve driving device with redundancy function Download PDFInfo
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- CN212302232U CN212302232U CN202020897771.6U CN202020897771U CN212302232U CN 212302232 U CN212302232 U CN 212302232U CN 202020897771 U CN202020897771 U CN 202020897771U CN 212302232 U CN212302232 U CN 212302232U
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Abstract
The utility model belongs to the technical field of automatic control and measurement of electric control valves of nuclear power stations, in particular to an electric control valve driving device with a redundancy function; the method comprises the following steps: the system comprises a daughter board card A, a daughter board card B, a relay, an output switching module, an X interface and an X interface; the daughter board card A and the daughter board card B are arranged in a redundant manner; the daughter board card A is respectively connected with a relay, an X interface and an X interface, and the relay is respectively connected with the X interface and the X interface; the relay is also connected with the output switching module; the daughter board card B is also connected with the relay, the X interface and the X interface respectively; and the output switching module is respectively connected with the daughter board card A and the daughter board card B.
Description
Technical Field
The utility model belongs to the technical field of nuclear power station electrical control valve automated control measures, concretely relates to electrical control valve drive arrangement with redundant function.
Background
At present, most of electric control valve driving devices of domestic nuclear power stations are thyristor control devices, a working main circuit of the control device mainly comprises a phase change circuit built by four bidirectional thyristors, and the electric control valves can rotate forwards and backwards by controlling the on-off of the thyristors. The main circuit of the control device does not have a redundancy design, so that the problem that the whole control device is unavailable due to breakdown of a single thyristor or unbalanced three-phase voltage and the like in the main circuit often occurs, the control of the electric regulating valve is influenced, and the safe and stable operation of the nuclear power station is not facilitated.
Therefore, an electric regulating valve driving device with a redundant function needs to be designed and developed, so that the fault rate of the regulating valve driving device can be greatly reduced, the reliability of equipment is effectively improved, and the safety performance of a power station is improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at designing an electrical control valve drive arrangement with redundant function to solve the interior work main circuit of current electrical control valve drive arrangement and do not have redundant function, easily lead to single thyristor breakdown or the unbalanced technical problem who arouses whole controlling means fault rate height or even unavailable in the nuclear power station motorised valve drive control main circuit.
The technical scheme of the utility model:
an electric regulator valve drive device with a redundant function, comprising: the system comprises a daughter board card A, a daughter board card B, a relay, an output switching module, an X interface and an X interface; the daughter board card A and the daughter board card B are arranged in a redundant manner; the daughter board card A is respectively connected with a relay, an X interface and an X interface, and the relay is respectively connected with the X interface and the X interface; the relay is also connected with the output switching module; the daughter board card B is also connected with the relay, the X interface and the X interface respectively; the output switching module is respectively connected with the daughter board card A and the daughter board card B;
still include in the daughter board card A: the power supply comprises a power supply input interface, a control and logic protection unit, a thyristor phase change circuit and a power supply output interface; the daughter board card A is connected with the X interface through a power input interface, and the power input interface further comprises an L, L, L three-phase alternating current branch circuit which is used for providing L, L, L three-phase alternating current for the thyristor phase-changing circuit; the thyristor phase change circuit is respectively connected with the power input interface and the power output interface; the thyristor commutation circuit is also provided with a control and logic protection unit;
the daughter board card B also comprises: the system comprises a daughter board card B power input interface, a daughter board card B control and logic protection unit, a daughter board card B thyristor commutation circuit and a daughter board card B power output interface; the daughter board card B power input interface is connected with an X1 interface, and the daughter board card B power input interface comprises an L1, an L2 and an L3 three-phase alternating current branch circuit which is used for providing L1, L2 and L3 three-phase alternating current for a daughter board card B thyristor commutation circuit; the daughter board card B thyristor commutation circuit is respectively connected with the daughter board card B power input interface and the daughter board card B power output interface; a control and logic protection unit is also arranged in the thyristor commutation circuit of the daughter board card B;
the daughter board card B and the daughter board card A are arranged in a redundant mode, and the structures and functions of the daughter board card B and the daughter board card A are the same.
The control and logic protection unit is connected with the X interface and used for receiving a control command and transmitting the control command to the thyristor commutation circuit to control the on-off of the thyristor; the control command includes: forward rotation, reverse rotation and brake signals;
the control and logic protection unit also monitors the operation stability of the thyristor commutation circuit and feeds back a positive and reverse condition and a fault signal to the output switching module, wherein the fault signal comprises: a power supply fault signal, a thyristor fault signal and a state deviation alarm signal; the power output interface is connected with the relay, and the power output interface further comprises: and the U-phase output terminal, the V-phase output terminal and the W-phase output terminal are used for providing U, V, W three-phase alternating current for the electric regulating valve.
The relay comprises K and K switches, and each switch also comprises a group of normally open contacts and normally closed contacts;
a normally open contact of a K switch in the relay is connected with a U-phase output end of a power output interface on the daughter board card A, a normally closed contact of the K switch is connected with a U-phase output end of a power output interface of the daughter board card B, the K normally open contact is connected with a W-phase output end of the power output interface of the daughter board card A, and the K normally closed contact is connected with a W-phase output of the power output interface of the daughter board card B; the relay receives a control command of the output switching module to control the normally open contact and the normally closed contact to act, so that the switching function of the output of the two sub-modules is realized;
the relay is connected with the X interface and transmits U, V, W three-phase alternating current to the electric regulating valve; and K, K switch normally-closed contacts in the relay are connected with the output switching module to feed back the master and standby conditions of the daughter board card B and the daughter board card A.
The output switching module is connected with the X interface and used for feeding back an alarm signal of the redundant module;
the output switching module is connected with the relay, and sends a command to control the on and off of two groups of contacts in the relay by diagnosing the fault conditions of the daughter board card A and the daughter board card B, so that the output switching function of the daughter board card A and the daughter board card B is realized; the output switching module is also used for receiving the fault alarm signals of the daughter board card A and the daughter board card B and carrying out logic judgment to generate alarm signals.
The X interface is also connected with an upstream cabinet breaker and used for receiving L, L and L three-phase alternating-current voltage and sending the voltage to the power supply input interfaces in the daughter board card A and the daughter board card B; the X interface is connected with the output switching module,
when the daughter board card A and the daughter board card B have faults simultaneously, the ACV voltage is output to the circuit breaker control circuit through the protection terminal to disconnect the circuit breaker; the X interface is connected with the relay and used for receiving the three-phase alternating-current voltage of the relay U, V, W and sending the three-phase alternating-current voltage to the electric regulating valve.
The X interface is also connected with an upper DCS control system and used for receiving forward and reverse control commands and transmitting the commands to the output switching module;
and the X interface also receives a fault signal of the daughter card A or the daughter card B fed back by the output switching module or a signal when the daughter card A and the daughter card B simultaneously fail and feeds back the signal to the upper DCS control system.
The thyristor commutation circuit comprises: the bidirectional thyristor comprises a bidirectional thyristor A, a bidirectional thyristor B, a bidirectional thyristor C and a bidirectional thyristor D; the bidirectional thyristor A and the bidirectional thyristor B are in a group and are connected with an L alternating current branch in a power input interface in the daughter board card A or the daughter board card B; the bidirectional thyristor C and the bidirectional thyristor D are in a group and are respectively connected with an L alternating current branch in a power input interface in the daughter board A or the daughter board B;
when the thyristor phase-changing circuit receives a forward rotation command of the control and logic protection unit, the bidirectional thyristor B and the bidirectional thyristor C in the thyristor phase-changing circuit are simultaneously conducted, and at the moment, the corresponding relation between the three-phase power supply and the power supply output interface is as follows: L-U, L-V, L-W;
when the thyristor commutation circuit receives a control and logic protection unit reversal command, the bidirectional thyristor A and the bidirectional thyristor D are conducted, and at the moment, the corresponding relation between the three-phase power supply and the power supply output interface is as follows: L-W, L-V, L-U.
And a power output interface in the daughter board card A is connected with the relay, the on-off of U, W two-phase alternating current is controlled through a K normally open contact and a K normally open contact, and the voltage of the V-phase is directly output to the relay.
The utility model has the advantages that:
the utility model relates to an electric control valve drive arrangement with redundant function, adopt a mainboard cassette to take two daughter board card modes of the same function to carry out the redundant configuration, two daughter board cards are in operating condition for one set during normal operation, another group is in hot standby state, single daughter board card can realize electric control valve control function, can effectively solve the problem that single electronic components trouble leads to whole control module to lose the function in original governing valve drive arrangement integrated circuit board, when the daughter board card that is in operating condition breaks down, can fast automatic switch to spare daughter board card output, and send out the suggestion and report to the police; the utility model relates to a regulating valve driving device with redundancy function, which has greatly improved reliability; through the board card structure of rationally arranging the control device, the on-line replacement of the fault board card of the control device can be realized so as to reduce the replacement cost of the driving device. In addition the utility model discloses still have following advantage:
1) the utility model designs the switching logic of the redundant board card, when a single daughter board card fails, the switching is directly carried out, and when two daughter board cards all fail, the logic protection function is designed;
2) the electric adjusting driving device is reasonable in structural design, the output switching module is installed at the front end, and the two redundant board cards are installed at the rear end, so that hot plugging of a single board card is realized, and the board card is convenient to overhaul and replace due to faults;
3) the utility model discloses an integrated circuit board internal work circuit structure adopts double-deck overall arrangement, and the shell is hugged closely to silicon controlled rectifier components and parts, has improved the radiating effect, has guaranteed that long-time operating temperature does not exceed standard.
4) The utility model discloses still provide and adopted step-down sampling circuit to realize the method to sub integrated circuit board thyristor breakdown state self-detection.
Drawings
Fig. 1 is a schematic structural view of an electric control valve driving device with redundant functions according to the present invention;
fig. 2 is a schematic view of an internal structure of the daughter board card a according to the present invention;
fig. 3 is a schematic diagram of the internal connection mode of the relay according to the present invention.
Fig. 4 is a schematic diagram of the connection mode of the X1 interface according to the present invention;
fig. 5 is a schematic diagram of the connection mode of the X2 interface according to the present invention;
fig. 6 is a flow chart of the output failure alarm function of the output switching module of the electric control valve driving device of the present invention;
fig. 7 is a flow chart of the output switching module output control command function of the electric control valve driving device of the present invention;
wherein: 1-daughter card a; 2-daughter card B; 3-an output switching module; 4-a relay; a 5-X1 interface; a 6-X2 interface; 7-power input interface; 8-a control and protection unit; 9-thyristor commutation circuit; 10-power output interface; and 11, a power output interface of the daughter board card B.
Detailed Description
The invention will be further described with reference to the following drawings and examples:
as shown in fig. 1 to 6, the utility model discloses a structure of two daughter boards of mainboard cassette tape, the complete redundant design of two daughter boards, only a daughter board is exported at the same time, and the daughter board that does not export can be changed by single online.
The logic of the fault detection and alarm signal is clear, when the output daughter board card has a fault, the output daughter board card is switched, when the fault of the sub-board card which is not output is detected, only the alarm prompt is carried out, and only when the fault of the two daughter board cards is detected, the operation of the module is forbidden.
The output of the two daughter boards can be self-maintained, and if the failed daughter board recovers to be normal or is replaced without being switched back, the current daughter board can be kept to be continuously output. The two independent daughter boards are provided with manual switching buttons, so that master-slave switching can be manually performed, and independent overhaul and function test are facilitated. And when the master sub-board card and the slave sub-board card are switched, a dry contact is provided for the instrument control system to alarm.
Because thyristor components and parts are bulky, it is more difficult to the redundant design of thyristor commutation circuit board card under the prerequisite that does not change original control module size to redundant daughter board card probably is unfavorable for the components and parts heat dissipation, consequently the utility model discloses take the mode that uses double-deck overall arrangement to two daughter board cards to thyristor components and parts take to hug closely the shell installation so that the heat dissipation will be exported simultaneously and switch integrated circuit board and relay and stack in two daughter board cards tops, make the module space obtain the maximize and utilize.
The thyristor fault is the most common fault of daughter board card faults, a self-detection method is designed, the breakdown state of the thyristor can be detected by adopting a voltage reduction sampling circuit, the voltage drop at two ends of the thyristor is very small when the thyristor is switched on, the voltage at two ends of the thyristor is very large when the thyristor is switched off, the two ends of the thyristor are sampled by a resistance-capacitance voltage reduction circuit and are isolated and output by an optical coupler, the actual output state of the thyristor can be obtained, and then the actual output state and the gate level of the thyristor are subjected to XOR logic, so that whether the thyristor is broken down can be known.
Example (b): an electric regulator valve drive device with a redundant function, comprising: the system comprises a daughter board card A1, a daughter board card B2, a relay 4, an output switching module 3, an X1 interface 5 and an X2 interface 6; the daughter board card A1 and the daughter board card B2 are arranged in a redundant manner; the daughter board card A1 is respectively connected with a relay 4, an X1 interface 5 and an X2 interface 6, and the relay 4 is respectively connected with an X1 interface 5 and an X2 interface 6; the relay 4 is also connected with the output switching module 3; the daughter board card B2 is also connected with the relay 4, the X1 interface 5 and the X2 interface 6 respectively; the output switching module 3 is respectively connected with a daughter card A1 and a daughter card B2;
the daughter board card A1 further comprises: the power supply protection circuit comprises a power supply input interface 7, a control and logic protection unit 8, a thyristor commutation circuit 9 and a power supply output interface 10; the daughter board card A1 is connected with the X1 interface 5 through a power input interface 7, and the power input interface 7 further comprises an L1, an L2 and an L3 three-phase alternating current branch circuit for providing L1, L2 and L3 three-phase alternating current for the thyristor commutation circuit 9; the thyristor phase-changing circuit 9 is respectively connected with the power input interface 7 and the power output interface 10; the thyristor commutation circuit 9 is also provided with a control and logic protection unit 8;
the daughter board card B2 also includes: the system comprises a daughter board card B power input interface, a daughter board card B control and logic protection unit, a daughter board card B thyristor commutation circuit and a daughter board card B power output interface 11; the daughter board card B power input interface is connected with the X1 interface 5, and the daughter board card B power input interface comprises L1, L2 and L3 three-phase alternating current branches which are used for providing L1, L2 and L3 three-phase alternating current for the daughter board card B thyristor commutation circuit; the thyristor commutation circuit of the daughter board card B is respectively connected with the power input interface of the daughter board card B and the power output interface 11 of the daughter board card B; a control and logic protection unit is also arranged in the thyristor commutation circuit of the daughter board card B;
the daughter board card B2 and the daughter board card A1 are arranged in a redundant mode, and the structure and the function of the daughter board card B2 are the same as those of the daughter board card A1.
The control and logic protection unit 8 is connected with the X2 interface 6 and is used for receiving a control command and transmitting the control command to the thyristor commutation circuit 9 to control the on-off of the thyristor; the control command includes: forward rotation, reverse rotation and brake signals;
the control and logic protection unit 8 also monitors the operation stability of the thyristor commutation circuit 9, and feeds back the positive and reverse conditions and fault signals to the output switching module 3, wherein the fault signals include: a power supply fault signal, a thyristor fault signal and a state deviation alarm signal; the power output interface 10 is connected with the relay 4, and the power output interface 10 further comprises: and the U-phase output terminal, the V-phase output terminal and the W-phase output terminal are used for providing U, V, W three-phase alternating current for the electric regulating valve.
The relay 4 comprises two switches K1 and K2, and each switch also comprises a group of normally open contacts and normally closed contacts;
a normally open contact of a K1 switch in the relay 4 is connected with a U-phase output end of a power output interface on the daughter board card A1, a normally closed contact of a K1 switch is connected with a U-phase output end of a power output interface of the daughter board card B2, a K2 normally open contact is connected with a W-phase output end of a power output interface of the daughter board card A1, and a K2 normally closed contact is connected with a W-phase output of a power output interface of the daughter board card B2; the relay receives a control command of the output switching module 3 to control the action of the normally open contact and the normally closed contact, so that the switching function of the output of the two sub-modules is realized;
the relay 4 is connected with an X1 interface 5 and transmits U, V, W three-phase alternating current to the electric regulating valve; normally closed contacts of switches K1 and K2 in the relay 4 are connected with the output switching module 3, and the master and standby conditions of the daughter board card B2 and the daughter board card A1 are fed back.
The output switching module 3 is connected with an X2 interface 6 and is used for feeding back redundant module alarm signals;
the output switching module 3 is connected with the relay 4, and the output switching module 3 sends a command to control on and off of two groups of contacts in the relay 4 through diagnosing the fault conditions of the daughter board card A1 and the daughter board card B2, so that the output switching function of the daughter board card A1 and the daughter board card B2 is realized; the output switching module 3 is further configured to receive fault alarm signals of the daughter board card a1 and the daughter board card B2, perform logic judgment, and generate an alarm signal.
The X1 interface 5 is also connected with an upstream cabinet breaker and used for receiving three-phase alternating-current voltages L1, L2 and L3 and sending the three-phase alternating-current voltages to power input interfaces in a daughter board card A1 and a daughter board card B2; the X1 interface 5 is connected to the output switching module 3,
when the daughter board card A1 and the daughter board card B2 simultaneously fail, the AC380V voltage is output to the circuit breaker control loop through the protection terminal to open the circuit breaker; the X1 interface 5 is connected with the relay 4 and used for receiving the three-phase alternating voltage of the relay U, V, W and sending the three-phase alternating voltage to the electric control valve.
The X2 interface 6 is also connected with an upper DCS control system and is used for receiving forward and reverse control commands and transmitting the commands to the output switching module 3;
the X2 interface 6 further receives a fault signal of the daughter board card a1 or the daughter board card B2 or a signal when the daughter board card a1 and the daughter board card B2 simultaneously fail, which is fed back by the output switching module 3, and feeds back the signal to the upper layer DCS control system.
The thyristor commutation circuit 9 comprises: the bidirectional thyristor comprises a bidirectional thyristor A, a bidirectional thyristor B, a bidirectional thyristor C and a bidirectional thyristor D; the bidirectional thyristor A and the bidirectional thyristor B are in a group and are connected with an L1 alternating current branch in a power input interface in the daughter board card A1 or the daughter board card B2; the bidirectional thyristors C and D are in a group and are respectively connected with an L3 alternating current branch in a power input interface in the daughter board A1 or the daughter board B2;
when the thyristor commutation circuit 9 receives a forward rotation command of the control and logic protection unit 8, the bidirectional thyristor B and the bidirectional thyristor C in the thyristor commutation circuit 9 are simultaneously conducted, and at this time, the corresponding relationship between the three-phase power supply and the power supply output interface 10 is as follows: L1-U, L2-V, L3-W;
when the thyristor commutation circuit 9 receives the reversal command of the control and logic protection unit 8, the bidirectional thyristor a and the bidirectional thyristor D are conducted, and at this time, the corresponding relationship between the three-phase power supply and the power supply output interface 10 is as follows: L1-W, L2-V, L3-U.
The power output interface 10 in the daughter board card A1 is connected with the relay 4, the on-off of U, W two-phase alternating current is controlled through a K1 normally open contact and a K2 normally open contact, and the voltage of the V-phase is directly output to the relay 4.
The utility model discloses a control method of electrical control valve drive arrangement with redundant function, including following step:
the method comprises the following steps: when the output switching module 3 detects that the daughter board card A1 and the daughter board card B2 have fault signals, analyzing whether the daughter board card is in an output state currently; the fault signals of the daughter board card A1 and the daughter board card B2 comprise: an internal power supply fault signal, a thyristor fault signal and a state deviation signal;
step two, if the fault signal daughter board card in the step one is a main output module, an alarm signal is sent, meanwhile, the relay 4 is controlled to change the on-off of a contact to switch off the three-phase power output of the fault daughter board card, and the three-phase power output of the hot standby daughter board card is connected with the electric regulating valve;
step three: if the fault signal daughter board card in the step one is in a non-output state, only sending out an alarm signal;
step four: when the output switching module 3 detects that the two daughter boards have fault signals, the fault signals are transmitted to the X1 interface to trigger a cabinet breaker on the upstream of the redundant module so as to prevent the electric regulating valve from being damaged.
The present invention has been described in detail with reference to the accompanying drawings and examples, but the present invention is not limited to the above examples, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art. The present invention can adopt the prior art for the content which is not described in detail in the present invention.
Claims (9)
1. An electric regulator valve drive device having a redundant function, characterized by comprising: the system comprises a daughter board card A (1), a daughter board card B (2), a relay (4), an output switching module (3), an X1 interface (5) and an X2 interface (6); the daughter board card A (1) and the daughter board card B (2) are arranged in a redundant manner; the daughter board card A (1) is respectively connected with a relay (4), an X1 interface (5) and an X2 interface (6), and the relay (4) is respectively connected with an X1 interface (5) and an X2 interface (6); the relay (4) is also connected with the output switching module (3); the daughter board card B (2) is also connected with the relay (4), the X1 interface (5) and the X2 interface (6) respectively; and the output switching module (3) is respectively connected with the daughter board card A (1) and the daughter board card B (2).
2. A motor-driven regulator valve drive unit with a redundancy function according to claim 1, characterized in that: still include in the daughter board card A (1): the power supply circuit comprises a power supply input interface (7), a control and logic protection unit (8), a thyristor commutation circuit (9) and a power supply output interface (10); the daughter board card A (1) is connected with an X1 interface (5) through a power input interface (7), and the power input interface (7) further comprises three-phase alternating current branches L1, L2 and L3, and is used for providing three-phase alternating current L1, L2 and L3 for a thyristor phase-changing circuit (9); the thyristor phase change circuit (9) is respectively connected with the power input interface (7) and the power output interface (10); the thyristor commutation circuit (9) is also provided with a control and logic protection unit (8);
the daughter board card B (2) also includes: the system comprises a daughter board card B power input interface, a daughter board card B control and logic protection unit, a daughter board card B thyristor commutation circuit and a daughter board card B power output interface (11); the daughter board card B power input interface is connected with an X1 interface (5), and the daughter board card B power input interface comprises L1, L2 and L3 three-phase alternating current branches which are used for providing L1, L2 and L3 three-phase alternating current for a daughter board card B thyristor commutation circuit; the thyristor commutation circuit of the daughter board card B is respectively connected with the power input interface of the daughter board card B and the power output interface (11) of the daughter board card B; a control and logic protection unit is also arranged in the thyristor commutation circuit of the daughter board card B;
the daughter board card B (2) and the daughter board card A (1) are arranged in a redundant mode, and the structure and the function of the daughter board card B (2) are the same as those of the daughter board card A (1).
3. A motor-driven regulator valve drive unit with a redundancy function according to claim 2, characterized in that: the control and logic protection unit (8) is connected with the X2 interface (6) and is used for receiving a control command and transmitting the control command to the thyristor commutation circuit (9) to control the on-off of the thyristor; the control command includes: forward rotation, reverse rotation and brake signals;
the control and logic protection unit (8) also monitors the operation stability of the thyristor commutation circuit (9), and feeds back a positive and reverse condition and a fault signal to the output switching module (3), wherein the fault signal comprises: a power supply fault signal, a thyristor fault signal and a state deviation alarm signal; the power output interface (10) is connected with the relay (4), and the power output interface (10) further comprises: and the U-phase output terminal, the V-phase output terminal and the W-phase output terminal are used for providing U, V, W three-phase alternating current for the electric regulating valve.
4. A motor-driven regulator valve drive unit with a redundancy function according to claim 3, characterized in that: the relay (4) comprises two switches K1 and K2, and each switch also comprises a group of normally open contacts and normally closed contacts;
a normally open contact of a K1 switch in the relay (4) is connected with a U-phase output end of a power output interface on the daughter board card A (1), a normally closed contact of a K1 switch is connected with a U-phase output end of a power output interface of the daughter board card B (2), a K2 normally open contact is connected with a W-phase output end of the power output interface of the daughter board card A (1), and a K2 normally closed contact is connected with a W-phase output of the power output interface of the daughter board card B (2); the relay receives a control command of the output switching module (3) to control the action of the normally open contact and the normally closed contact, so that the switching function of the output of the two sub-modules is realized;
the relay (4) is connected with the X1 interface (5) and transmits U, V, W three-phase alternating current to the electric regulating valve; normally closed contacts of K1 and K2 in the relay (4) are connected with the output switching module (3), and the master and standby conditions of the daughter board card B (2) and the daughter board card A (1) are fed back.
5. A motor-driven regulator valve drive unit with a redundancy function according to claim 4, characterized in that: the output switching module (3) is connected with an X2 interface (6) and is used for feeding back a redundant module alarm signal;
the output switching module (3) is connected with the relay (4), and the output switching module (3) sends a command to control the on and off of two groups of contacts in the relay (4) by diagnosing the fault conditions of the daughter board card A (1) and the daughter board card B (2), so that the output switching function of the daughter board card A (1) and the daughter board card B (2) is realized; the output switching module (3) is also used for receiving fault alarm signals of the daughter board card A (1) and the daughter board card B (2) and carrying out logic judgment to generate alarm signals.
6. A motor-driven regulator valve drive unit with a redundancy function according to claim 5, characterized in that: the X1 interface (5) is also connected with an upstream cabinet breaker and is used for receiving three-phase alternating-current voltages L1, L2 and L3 and sending the three-phase alternating-current voltages to power input interfaces in the daughter board card A (1) and the daughter board card B (2); the X1 interface (5) is connected with the output switching module (3),
when the daughter board card A (1) and the daughter board card B (2) have faults simultaneously, the AC380V voltage is output to the circuit breaker control loop through the protection terminal to disconnect the circuit breaker; the X1 interface (5) is connected with the relay (4) and used for receiving the three-phase alternating voltage of the relay U, V, W and sending the three-phase alternating voltage to the electric regulating valve.
7. A motor-driven regulator valve drive unit with a redundancy function according to claim 6, characterized in that: the X2 interface (6) is also connected with an upper DCS control system and is used for receiving forward and reverse control commands and transmitting the commands to the output switching module (3);
the X2 interface (6) also receives a fault signal of the daughter card A (1) or the daughter card B (2) fed back by the output switching module (3) or a signal when the daughter card A (1) and the daughter card B (2) simultaneously fail and feeds back the signal to the upper DCS control system.
8. A motor-driven regulator valve drive unit with a redundancy function according to claim 7, characterized in that: the thyristor commutation circuit (9) comprises: the bidirectional thyristor comprises a bidirectional thyristor A, a bidirectional thyristor B, a bidirectional thyristor C and a bidirectional thyristor D; the bidirectional thyristor A and the bidirectional thyristor B are in a group and are connected with an L1 alternating current branch in a power input interface in the daughter board A (1) or the daughter board B (2); the bidirectional thyristors C and D are in a group and are respectively connected with an L3 alternating current branch in a power input interface in the daughter board card A (1) or the daughter board card B (2);
when the thyristor commutation circuit (9) receives a forward rotation command of the control and logic protection unit (8), the bidirectional thyristor B and the bidirectional thyristor C in the thyristor commutation circuit (9) are conducted simultaneously, and at the moment, the corresponding relation between the three-phase power supply and the power supply output interface (10) is as follows: L1-U, L2-V, L3-W;
when the thyristor commutation circuit (9) receives a reversal command of the control and logic protection unit (8), the bidirectional thyristor A and the bidirectional thyristor D are conducted, and at the moment, the corresponding relation between the three-phase power supply and the power supply output interface (10) is as follows: L1-W, L2-V, L3-U.
9. A redundant-function electric regulator valve drive unit according to claim 8, wherein: and a power output interface (10) in the daughter board card A (1) is connected with the relay (4), the on-off of U, W two-phase alternating current is controlled through a K1 normally open contact and a K2 normally open contact, and the V-phase voltage is directly output to the relay (4).
Priority Applications (1)
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| CN111596542A (en) * | 2020-05-26 | 2020-08-28 | 江苏核电有限公司 | Electric regulating valve driving device with redundancy function and control method thereof |
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