CN212726901U - Nuclear power plant excitation power supply system and excitation regulator power supply output circuit thereof - Google Patents
Nuclear power plant excitation power supply system and excitation regulator power supply output circuit thereof Download PDFInfo
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- CN212726901U CN212726901U CN202021773325.0U CN202021773325U CN212726901U CN 212726901 U CN212726901 U CN 212726901U CN 202021773325 U CN202021773325 U CN 202021773325U CN 212726901 U CN212726901 U CN 212726901U
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Abstract
The utility model belongs to the technical field of generator excitation and voltage regulation system, a field regulator power output circuit and a nuclear power plant field power supply system are provided, wherein, the field regulator power output circuit comprises a first power supply device, a first switch circuit, a second switch circuit, a first control power supply component and a first excitation switch control component, the field regulator power output circuit enables the power supply loops of the first control power supply component and the first excitation switch control component to be controlled independently by arranging the first switch circuit and the second switch circuit, thereby enabling the first working power supply supplied to the field regulator and the power supply supplied to the field switch brake to be controlled independently, avoiding that the protection power supply loop is disconnected when the control power supply loop of the field regulator breaks down, and avoiding the situation that the field switch can not be disconnected when primary equipment such as a generator breaks down, the safety of primary equipment such as a generator is improved.
Description
Technical Field
The utility model belongs to the technical field of nuclear power plant's generator excitation and voltage regulation system, especially, relate to a nuclear power plant excitation power supply system and excitation regulator power output circuit thereof.
Background
The excitation system of the large generator of the nuclear power station mainly establishes a magnetic field for the generator, wherein an excitation regulator (AVR for short) plays a role in core regulation and control in the excitation system of the generator, and changes the magnitude of the excitation current of the generator by regulating the trigger angle of a silicon controlled rectifier bridge, thereby achieving the purpose of regulating the strength of the magnetic field of the generator and the terminal voltage. The power supply of the AVR includes a control power supply and a protection power supply. Controlling a power supply to supply power to AVR equipment and providing power required by normal operation of the AVR equipment; the protection power supply supplies power to the excitation switch operation loop, and normal opening and closing of the excitation switch can be guaranteed. The control power supply and the protection power supply of the traditional excitation regulator share the same power supply, when the loop of the control power supply fails and is disconnected, the loop of the protection power supply can be disconnected at the same time, and if primary equipment such as a generator fails, an excitation switch cannot be disconnected, so that the primary equipment is seriously damaged.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a power supply output circuit of an excitation regulator, and aims to solve the problem that an excitation switch cannot be disconnected when a loop of a control power supply is disconnected due to a fault in the conventional power supply output circuit of the excitation regulator.
A first aspect of an embodiment of the present application provides an excitation regulator power output circuit, including a first power supply device, a first switch circuit, a second switch circuit, a first control power supply component, and a first excitation switch control component;
the first switching circuit is connected in series between a first power supply device and a first control power supply component, the second switching circuit is connected in series between the first power supply device and a first excitation switch control component, and the first control power supply component is connected in series between the first switching circuit and an excitation regulator;
the first power supply device is used for providing a first alternating current power supply;
the first switch circuit is used for switching on and off a first alternating current power supply between the first power supply device and the first control power supply component;
the second switch circuit is used for switching on and off a first alternating current power supply between the first power supply device and the first excitation switch control assembly;
the first control power supply assembly is used for converting the first alternating current power supply into a first working power supply and outputting the first working power supply to the excitation regulator;
and the first excitation switch control assembly is used for starting when the second switch circuit is switched on and controlling the on-off action of the excitation switch according to a control instruction.
In a first aspect, in one embodiment, the first excitation switch control component includes a closing control component and an opening control component;
the switching-on control assembly is electrically connected with the second switch circuit and the excitation switch respectively, and the switching-off control assembly is electrically connected with the second switch circuit and the excitation switch respectively;
the closing control assembly is used for controlling the excitation switch to close according to an input closing signal when the second switching circuit is switched on;
and the brake separating control assembly is used for controlling the brake separating of the excitation switch according to an input brake separating signal when the second switch circuit is switched on.
In a first aspect, in one embodiment, the closing control assembly includes a closing signal receiving element and a closing coil;
the switching-on signal receiving element is respectively connected with the second switching circuit and the switching-on coil, and the switching-on coil is coupled with the excitation switch;
the switching-on signal receiving element is used for enabling the switching-on coil to be conducted and excited according to an input switching-on signal when the second switching circuit is conducted;
and the closing coil is used for controlling the excitation switch to close when excitation is conducted.
In a first aspect, in one embodiment, the closing signal receiving element includes a first signal receiving unit and a closing unit;
the first signal receiving unit is coupled with the switching-on unit, a first end of the switching-on unit is connected with a first output end of the second switching circuit, a second end of the switching-on unit is connected with a first end of the switching-on coil, and a second end of the switching-on coil is connected with a second output end of the second switching circuit;
the first signal receiving unit is used for controlling the closing unit to be closed and conducted when a closing signal is input so as to enable the closing coil to be excited and conducted.
In a first aspect, in one embodiment, the opening control assembly includes an opening signal receiving element and an opening coil;
the brake separating signal receiving element is respectively connected with the second switch circuit and the brake separating coil, and the brake separating coil is coupled with the excitation switch;
the brake separating signal receiving element is used for enabling the brake separating coil to be conducted and excited according to an input brake separating signal when the second switch circuit is conducted;
and the opening coil is used for controlling the opening of the excitation switch when excitation is conducted.
In the first aspect, in one embodiment, the switching-off signal receiving element includes a second signal receiving unit and a switching-off unit;
the second signal receiving unit is coupled with the switching-off unit, a first end of the switching-off unit is connected with a first output end of the second switch circuit, a second end of the switching-off unit is connected with a first end of the switching-off coil, and a second end of the switching-off coil is connected with a second output end of the second switch circuit;
the second signal receiving unit is used for controlling the switching-on and switching-on of the switching-off unit when a switching-off signal is input so as to enable the switching-off coil to be switched on and excited.
In the first aspect, in one embodiment, the opening control assembly further includes a protection element, and the protection element is respectively connected to the second switch circuit and the opening coil;
and the protection element is used for controlling the opening coil to be excited according to an input protection action signal when the second switch circuit is switched on.
In a first aspect, in one embodiment, the protection element includes a third signal receiving unit and a protection unit;
the third signal receiving unit is coupled with the protection unit, a first end of the protection unit is connected with a first output end of the second switch circuit, and a second end of the protection unit is connected with a first end of the opening coil;
and the third signal receiving unit is used for controlling the opening unit to be conducted when a protection action signal is input so as to enable the opening coil to be conducted and excited.
In a first aspect, in one embodiment, the excitation regulator power output circuit further comprises a second power supply device, a third switching circuit, a fourth switching circuit, a second control power supply component, and a second excitation switch control component;
the third switching circuit is connected in series between a second power supply device and a second control power supply component, the fourth switching circuit is connected in series between the second power supply device and a second excitation switch control component, and the second control power supply component is connected in series between the second switching circuit and an excitation regulator;
the second power supply device is used for providing a second alternating current power supply;
the third switch circuit is used for switching on and off a second alternating current power supply between the second power supply device and the second control power supply component;
the fourth switch circuit is used for switching on and off a second alternating current power supply between the second power supply device and the second excitation switch control assembly;
the second control power supply assembly is used for converting the alternating current power supply into a second working power supply and outputting the second working power supply to the excitation regulator;
the second excitation switch control assembly is used for starting when the fourth switch circuit is conducted and controlling the on-off action of the excitation switch according to a control instruction;
wherein the first operating power supply and the second operating power supply are redundant to each other.
A second aspect of the embodiments of the present application provides a nuclear power plant excitation power supply system, including an excitation regulator, an excitation switch, and an excitation regulator power supply output circuit as described in any embodiment of the first aspect;
the excitation regulator power output circuit is respectively connected with the excitation switch and the excitation regulator;
the excitation regulator power supply output circuit is used for outputting the first working power supply to the excitation regulator and controlling the opening and closing actions of the excitation switch according to an input control instruction;
the excitation regulator power supply output circuit is used for outputting the first working power supply to the excitation regulator.
Compared with the prior art, the embodiment of the utility model beneficial effect who exists is: the excitation regulator power output circuit enables the power supply loops of the first control power supply assembly and the first excitation switch control assembly to be controlled independently of each other by arranging the first switch circuit and the second switch circuit, so that the first working power supply for the excitation regulator and the power supply for the excitation switch on-off can be controlled independently of each other, the situation that the protection power supply loop is disconnected when the loop of the control power supply of the excitation regulator breaks down and the excitation switch cannot be disconnected when primary equipment such as a generator breaks down is avoided, and the safety of the primary equipment such as the generator is improved.
Drawings
FIG. 1 is a first schematic diagram of an excitation regulator power output circuit according to an embodiment of the present disclosure;
FIG. 2 is a second schematic diagram of an excitation regulator power output circuit according to an embodiment of the present disclosure;
FIG. 3 is an exemplary circuit schematic diagram of an excitation regulator power output circuit provided by an embodiment of the present application;
fig. 4 is a schematic diagram of a third structure of a power output circuit of an excitation regulator according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1, fig. 1 shows a first structural schematic diagram of an output circuit of an excitation regulator off-state power supply provided by an embodiment of the present application, and for convenience of description, only the parts related to the embodiment are shown, and detailed descriptions are as follows:
the excitation regulator off-power output circuit includes a first power supply device 110, a first switching circuit 120, a second switching circuit 140, a first control power supply component 130, and a first excitation switch 320 control component 150; the first switching circuit 120 is connected in series between the first power supply device 110 and the first control power supply assembly 130, the second switching circuit 140 is connected in series between the first power supply device 110 and the first excitation switch 320 control assembly 150, and the first control power supply assembly 130 is connected in series between the first switching circuit 120 and the excitation regulator 310; the first power supply device 110 is used for supplying a first alternating current power supply; the first switch circuit 120 is used to switch on/off the first ac power between the first power supply device 110 and the first control power supply component 130; the second switch circuit 140 is used for switching on and off the first alternating current power supply between the first power supply device 110 and the control component 150 of the first excitation switch 320; the first control power supply assembly 130 is configured to convert the first ac power into a first working power and output the first working power to the excitation regulator 310; the first excitation switch 320 control component 150 is configured to start when the second switch circuit 140 is turned on, and control the excitation switch 320 to open and close according to a control command.
In the present embodiment, by providing the first switch circuit 120 and the second switch circuit 140, the power supply loops of the first control power supply assembly 130 and the control assembly 150 of the first excitation switch 320 can be controlled independently of each other, so that the first operating power supply (corresponding to the control power supply of the excitation regulator 310) supplied to the excitation regulator 310 and the power supply (corresponding to the protection power supply of the excitation regulator 310) supplied to the switching of the excitation switch 320 can be controlled independently of each other, thereby preventing the protection power supply loop from being disconnected when the loop of the control power supply of the excitation regulator 310 fails, preventing the excitation switch 320 from being disconnected when a primary device such as a generator fails, and improving the safety of the primary device such as a generator.
The first power device 110 may be one of a line network power supply, a transformer, a generator, a permanent magnet machine, etc.; the first switching circuit 120 and the second switching circuit 140 may each be one or a combination of more of a circuit breaker, an air switch, a fuse, a contactor, and the like; the first control power supply assembly 130 is a conventional power supply assembly for providing normal operation of the field regulator 310, and the specific model and specification are routine choices made by those skilled in the art according to actual needs, and are not limited herein; the first excitation switch 320 control component 150 may be a circuit composed of electronic elements such as a coil and a contact, which can realize the function of the first excitation switch 320 control component 150 described in this embodiment, and the specific structure thereof is a routine design performed by those skilled in the art according to actual needs, and is not limited herein.
Referring to fig. 2, in an embodiment, the first excitation switch 320 control component 150 includes a closing control component 151 and a separating control component 152, the closing control component 151 is electrically connected to the second switch circuit 140 and the excitation switch 320, the separating control component 152 is electrically connected to the second switch circuit 140 and the excitation switch 320, the closing control component 151 is configured to control the excitation switch 320 to close according to an input closing signal when the second switch circuit 140 is turned on, and the separating control component 152 is configured to control the excitation switch 320 to separate according to an input separating signal when the second switch circuit 140 is turned on.
In this embodiment, when the second switch circuit 140 is turned on, the closing control component 151 obtains electric energy and is in a working state, the closing control component 151 receives a closing signal to perform closing control on the excitation switch 320, the opening control component 152 obtains electric energy and is in a working state, the opening control component 152 receives an opening signal to perform opening control on the excitation switch 320, and the closing control component 151 and the opening control component 152 are respectively utilized to perform opening and closing control on the excitation switch 320, so that stability of opening and closing control on the excitation switch 320 can be improved.
The electrical connection between the closing control component 151 and the excitation switch 320 may be one of electromagnetic coupling, photoelectric coupling, and mechanical coupling, the electrical connection between the opening control component 152 and the excitation switch 320 may be one of electromagnetic coupling, photoelectric coupling, and mechanical coupling, the closing control component 151 may be a circuit composed of electronic components such as a coil and a contact and capable of implementing the function of the closing control component 151 described in this embodiment, the opening control component 152 may be a circuit composed of electronic components such as a coil and a contact and capable of implementing the function of the closing control component 151 described in this embodiment, and the specific structures of the closing control component 151 and the opening control component 152 are conventional designs performed by those skilled in the art according to actual needs, and are not limited herein.
Referring to fig. 3, in an embodiment, the closing control assembly 151 includes a closing signal receiving element 153 and a closing coil KM 1; the closing signal receiving element 153 is respectively connected with the second switching circuit 140 and the closing coil KM1, and the closing coil KM1 is coupled with the excitation switch 320; the closing signal receiving element 153 is configured to turn on and excite the closing coil KM1 according to an input closing signal when the second switching circuit 140 is turned on; the closing coil KM1 is used for controlling the excitation switch 320 to close when excitation is conducted.
In this embodiment, when the closing signal receiving element 153 receives a closing signal, the closing signal receiving element 153 controls the closing coil KM1 to be turned on, the closing coil KM1 turns on the excitation and controls the excitation switch 320 to be closed, and the closing coil KM1 controls the excitation switch 320 to be closed, so that direct contact between the control end and the controlled end is avoided, thereby avoiding the influence of a large current and a large voltage of the controlled end on the control end, and improving the safety of the control end.
The closing signal receiving element 153 may be a circuit composed of electronic elements such as a coil and a contact, which can realize the function of the closing signal receiving element 153 described in this embodiment, and the specific structure thereof is a conventional design performed by those skilled in the art according to actual needs, and is not limited herein.
Referring to fig. 3, in an embodiment, the closing signal receiving element 153 includes a first signal receiving unit and a closing unit L1; the first signal receiving unit is coupled with the closing unit L1, the first end of the closing unit L1 is connected with the first output end of the second switch circuit 140, the second end of the closing unit L1 is connected with the first end of the closing coil KM1, and the second end of the closing coil KM1 is connected with the second output end of the second switch circuit 140; the first signal receiving unit is used for controlling the closing unit L1 to be closed and conducted when a closing signal is input, so that the closing coil KM1 is conducted and excited. When the second switching circuit 140 is turned on, the first signal receiving unit controls the switching-on unit L1 to be turned on when receiving the switching-on signal, so that the switching-on coil KM1 connected in series with the switching-on unit L1 is switched on for excitation, thereby controlling the excitation switch 320 to be switched on.
The first signal receiving unit may be a circuit composed of components such as a coil and a diode and capable of implementing the function of the first signal receiving unit described in this embodiment, the closing unit L1 may be a circuit composed of components such as a contact and an optocoupler field effect transistor and capable of implementing the function of the closing unit L1 described in this embodiment, and the specific structures of the first signal receiving unit and the closing unit L1 are conventional designs performed by those skilled in the art according to actual needs, and are not limited herein.
Referring to fig. 3, in one embodiment, the switching-off control assembly 152 includes a switching-off signal receiving element 154 and a switching-off coil KM 2; the switching-off signal receiving element 154 is respectively connected with the second switch circuit 140 and the switching-off coil KM2, and the switching-off coil KM2 is coupled with the excitation switch 320; the switching-off signal receiving element 154 is used for enabling the switching-off coil KM2 to be switched on and excited according to an input switching-off signal when the second switching circuit 140 is switched on; the opening coil KM2 is used for controlling the opening of the excitation switch 320 when the excitation is conducted.
In this embodiment, when the opening signal receiving element 154 receives an opening signal, the opening signal receiving element 154 controls the opening coil KM2 to be turned on, the opening coil KM2 is turned on to excite and control the excitation switch 320 to be opened, and the opening coil KM2 controls the excitation switch 320 to be opened to avoid direct contact between the control terminal and the controlled terminal, so that the influence of large current and large voltage of the controlled terminal on the control terminal is avoided, and the safety of the control terminal can be improved.
The opening signal receiving element 154 may be a circuit composed of electronic elements such as a coil and a contact, which can realize the function of the opening signal receiving element 154 described in this embodiment, and the specific structure thereof is a conventional design performed by those skilled in the art according to actual needs, and is not limited herein.
Referring to fig. 3, in one embodiment, the gate-separated signal receiving device 154 includes a second signal receiving unit and a gate-separated unit L2; the second signal receiving unit is coupled with the switching-off unit L2, a first end of the switching-off unit L2 is connected with a first output end of the second switch circuit 140, a second end of the switching-off unit L2 is connected with a first end of the switching-off coil KM2, and a second end of the switching-off coil KM2 is connected with a second output end of the second switch circuit 140; the second signal receiving unit is used for controlling the switching-on and switching-on of the switching-off unit L2 when a switching-off signal is input, so that the switching-off coil KM2 is switched on and excited. When the second switch circuit 140 is turned on, the second signal receiving unit controls the opening unit L2 to be turned on when receiving the opening signal, so that the opening coil KM2 connected in series with the opening unit L2 is turned on and excited to control the excitation switch 320 to be opened.
The second signal receiving unit may be a circuit composed of components such as a coil and a diode and capable of implementing the function of the second signal receiving unit described in this embodiment, the opening unit L2 may be a circuit composed of components such as a contact and an optocoupler field effect transistor and capable of implementing the function of the opening unit L2 described in this embodiment, and the specific structures of the second signal receiving unit and the opening unit L2 are conventional designs performed by those skilled in the art according to actual needs, and are not limited herein.
Referring to fig. 3, in an embodiment, the opening control assembly 152 further includes a protection device 155, and the protection device 155 is respectively connected to the second switch circuit 140 and the opening coil KM 2; the protection element 155 is configured to control the opening coil KM2 to be energized according to the input protection operation signal when the second switch circuit 140 is turned on. In this embodiment, the protection action signal may be a protection action signal that the excitation regulator 310 needs to be disconnected when the generator fails, and when receiving the protection action signal, the protection unit L3 controls the opening coil KM2 to turn on excitation, so as to control the opening of the excitation switch 320, thereby achieving the effect of protecting the generator.
The protection element 155 and the opening coil KM2 are coupled, the protection element 155 may be a circuit composed of electronic elements such as a coil and a contact and capable of implementing the function of the protection element 155 described in this embodiment, and the specific structure thereof is a conventional design performed by those skilled in the art according to actual needs, and is not limited herein.
Referring to fig. 3, in one embodiment, the protection device 155 includes a third signal receiving unit and a protection unit L3; the third signal receiving unit is coupled with the protection unit L3, a first end of the protection unit L3 is connected with a first output end of the second switch circuit 140, and a second end of the protection unit L3 is connected with a first end of the opening coil KM 2; the third signal receiving unit is used for controlling the opening unit L2 to be conducted when the protection action signal is input, so that the opening coil KM2 is conducted and excited.
In this embodiment, the protection unit L3 functions as a controlled switch, and when the third signal receiving unit receives the protection action signal, the third signal receiving unit controls the protection unit L3 to be turned on, and when the protection unit L3 is turned on, the opening coil KM2 connected in series with the protection unit L is turned on and excited.
The third signal receiving unit may be a circuit composed of components such as a coil and a diode and capable of implementing the function of the third signal receiving unit described in this embodiment, the protection unit L3 may be a circuit composed of components such as a contact and an optocoupler field effect transistor and capable of implementing the function of the protection unit L3 described in this embodiment, and specific structures of the third signal receiving unit and the protection unit L3 are conventional designs performed by those skilled in the art according to actual needs, and are not limited herein.
Referring to fig. 4, in one embodiment, the excitation regulator switching power output circuit further includes a second power supply device 210, a third switching circuit 220, a fourth switching circuit 240, a second control power supply assembly 230, and a second excitation switch 320 control assembly, the third switching circuit 220 is connected in series between the second power supply device 210 and the second control power supply assembly 230, the fourth switching circuit 240 is connected in series between the second power supply device 210 and the second excitation switch 320 control assembly, and the second control power supply assembly 230 is connected in series between the second switching circuit 140 and the excitation regulator 310; the second power supply device 210 is used for providing a second alternating current power supply, the third switching circuit 220 is used for switching on and off the second alternating current power supply between the second power supply device 210 and the second control power supply assembly 230, the fourth switching circuit 240 is used for switching on and off the second alternating current power supply between the second power supply device 210 and the second excitation switch 320 control assembly, the second control power supply assembly 230 is used for converting the alternating current power supply into a second working power supply and outputting the second working power supply to the excitation regulator 310, the second excitation switch 320 control assembly is used for starting when the fourth switching circuit 240 is switched on and controlling the excitation switch 320 to be switched on and switched off according to a control command, and the first working power supply and the second working power supply are redundant.
In the present embodiment, by providing the second power supply device 210, the third switching circuit 220, the fourth switching circuit 240, the second control power supply unit 230, and the second excitation switch 320 control unit, the second operating power supply in which the excitation regulator 310 and the first operating power supply are redundant can be provided, and the stability of supply of the operating power supply to the excitation regulator 310 can be improved.
For example, the second power supply device 210 is a two-phase power output by a permanent magnet machine, the first power supply device 110 is another two-phase power output by a permanent magnet machine, the third switching circuit 220 may have the same structure as the first switching circuit 120 of any of the above embodiments, the fourth switching circuit 240 may have the same or similar structure as the second switching circuit 140 of any of the above embodiments, the second control power module 230 may have the same or similar structure as the first control power module 130, and the second excitation switch 320 may have the same or similar structure as the first excitation switch 320 of any of the above embodiments.
The embodiment of the application also provides an excitation power supply system of a nuclear power plant, which comprises an excitation regulator 310, an excitation switch 320 and an excitation regulator power-off output circuit, and the specific structure of the excitation regulator power-off output circuit refers to the above embodiments. The excitation regulator off-power output circuit is respectively connected with the excitation switch 320 and the excitation regulator 310, and is used for outputting a first working power to the excitation regulator 310 and controlling the switching-on and switching-off action of the excitation switch 320 according to an input control instruction.
In this embodiment, the excitation regulator off-power output circuit is provided with the first switch circuit 120 and the second switch circuit 140, so that the power supply loops of the first control power supply assembly 130 and the first excitation switch 320 control assembly 150 can be controlled independently from each other, thereby avoiding disconnection of the protection power supply loop when the loop of the control power supply of the excitation regulator 310 fails, avoiding a situation that the excitation switch 320 cannot be disconnected when primary equipment such as a generator fails, and improving the safety of the primary equipment such as the generator.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A power supply output circuit of an excitation regulator is characterized by comprising a first power supply device, a first switch circuit, a second switch circuit, a first control power supply assembly and a first excitation switch control assembly;
the first switching circuit is connected in series between a first power supply device and a first control power supply component, the second switching circuit is connected in series between the first power supply device and a first excitation switch control component, and the first control power supply component is connected in series between the first switching circuit and an excitation regulator;
the first power supply device is used for providing a first alternating current power supply;
the first switch circuit is used for switching on and off a first alternating current power supply between the first power supply device and the first control power supply component;
the second switch circuit is used for switching on and off a first alternating current power supply between the first power supply device and the first excitation switch control assembly;
the first control power supply assembly is used for converting the first alternating current power supply into a first working power supply and outputting the first working power supply to the excitation regulator;
and the first excitation switch control assembly is used for starting when the second switch circuit is switched on and controlling the on-off action of the excitation switch according to a control instruction.
2. The field regulator power output circuit of claim 1, wherein the first field switch control component comprises a closing control component and an opening control component;
the switching-on control assembly is electrically connected with the second switch circuit and the excitation switch respectively, and the switching-off control assembly is electrically connected with the second switch circuit and the excitation switch respectively;
the closing control assembly is used for controlling the excitation switch to close according to an input closing signal when the second switching circuit is switched on;
and the brake separating control assembly is used for controlling the brake separating of the excitation switch according to an input brake separating signal when the second switch circuit is switched on.
3. The excitation regulator power output circuit of claim 2, wherein the closing control component comprises a closing signal receiving element and a closing coil;
the switching-on signal receiving element is respectively connected with the second switching circuit and the switching-on coil, and the switching-on coil is coupled with the excitation switch;
the switching-on signal receiving element is used for enabling the switching-on coil to be conducted and excited according to an input switching-on signal when the second switching circuit is conducted;
and the closing coil is used for controlling the excitation switch to close when excitation is conducted.
4. The excitation regulator power output circuit of claim 3, wherein the closing signal receiving element comprises a first signal receiving unit and a closing unit;
the first signal receiving unit is coupled with the switching-on unit, a first end of the switching-on unit is connected with a first output end of the second switching circuit, a second end of the switching-on unit is connected with a first end of the switching-on coil, and a second end of the switching-on coil is connected with a second output end of the second switching circuit;
the first signal receiving unit is used for controlling the closing unit to be closed and conducted when a closing signal is input so as to enable the closing coil to be excited and conducted.
5. The excitation regulator power supply output circuit of claim 2, wherein the opening control component comprises an opening signal receiving element and an opening coil;
the brake separating signal receiving element is respectively connected with the second switch circuit and the brake separating coil, and the brake separating coil is coupled with the excitation switch;
the brake separating signal receiving element is used for enabling the brake separating coil to be conducted and excited according to an input brake separating signal when the second switch circuit is conducted;
and the opening coil is used for controlling the opening of the excitation switch when excitation is conducted.
6. The excitation regulator power supply output circuit of claim 5, wherein the opening signal receiving element comprises a second signal receiving unit and an opening unit;
the second signal receiving unit is coupled with the switching-off unit, a first end of the switching-off unit is connected with a first output end of the second switch circuit, a second end of the switching-off unit is connected with a first end of the switching-off coil, and a second end of the switching-off coil is connected with a second output end of the second switch circuit;
the second signal receiving unit is used for controlling the switching-on and switching-on of the switching-off unit when a switching-off signal is input so as to enable the switching-off coil to be switched on and excited.
7. The excitation regulator power supply output circuit of claim 5, wherein the opening control assembly further comprises a protection element connected to the second switching circuit and the opening coil, respectively;
and the protection element is used for controlling the opening coil to be excited according to an input protection action signal when the second switch circuit is switched on.
8. The excitation regulator power supply output circuit of claim 7, wherein the protection element comprises a third signal receiving unit and a protection unit;
the third signal receiving unit is coupled with the protection unit, a first end of the protection unit is connected with a first output end of the second switch circuit, and a second end of the protection unit is connected with a first end of the opening coil;
and the third signal receiving unit is used for controlling the opening unit to be conducted when a protection action signal is input so as to enable the opening coil to be conducted and excited.
9. The field regulator power supply output circuit of claim 1, further comprising a second power supply device, a third switching circuit, a fourth switching circuit, a second control power supply component, and a second field switch control component;
the third switching circuit is connected in series between a second power supply device and a second control power supply component, the fourth switching circuit is connected in series between the second power supply device and a second excitation switch control component, and the second control power supply component is connected in series between the second switching circuit and an excitation regulator;
the second power supply device is used for providing a second alternating current power supply;
the third switch circuit is used for switching on and off a second alternating current power supply between the second power supply device and the second control power supply component;
the fourth switch circuit is used for switching on and off a second alternating current power supply between the second power supply device and the second excitation switch control assembly;
the second control power supply assembly is used for converting the alternating current power supply into a second working power supply and outputting the second working power supply to the excitation regulator;
the second excitation switch control assembly is used for starting when the fourth switch circuit is conducted and controlling the on-off action of the excitation switch according to a control instruction;
wherein the first operating power supply and the second operating power supply are redundant to each other.
10. A nuclear power plant excitation power supply system comprising an excitation regulator, an excitation switch and an excitation regulator power supply output circuit as claimed in any one of claims 1 to 9;
the excitation regulator power output circuit is respectively connected with the excitation switch and the excitation regulator;
the excitation regulator power supply output circuit is used for outputting the first working power supply to the excitation regulator and controlling the opening and closing actions of the excitation switch according to an input control instruction.
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| CN112104276A (en) * | 2020-08-21 | 2020-12-18 | 岭澳核电有限公司 | Power supply output circuit of excitation regulator of nuclear power plant |
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| CN112104276A (en) * | 2020-08-21 | 2020-12-18 | 岭澳核电有限公司 | Power supply output circuit of excitation regulator of nuclear power plant |
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