CN212726900U - Nuclear power plant excitation system, excitation regulator working power supply and power supply output circuit - Google Patents
Nuclear power plant excitation system, excitation regulator working power supply and power supply output circuit Download PDFInfo
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- CN212726900U CN212726900U CN202021761303.2U CN202021761303U CN212726900U CN 212726900 U CN212726900 U CN 212726900U CN 202021761303 U CN202021761303 U CN 202021761303U CN 212726900 U CN212726900 U CN 212726900U
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Abstract
The utility model belongs to the technical field of generator excitation and voltage regulation system, a nuclear power plant excitation system is provided, excitation regulator working power supply output circuit and power output circuit thereof, excitation regulator working power supply output circuit disconnects switch protection circuit to make the voltage feedback component disconnect and insert three-phase alternating current power supply when measuring the voltage value of working voltage that permanent magnet machine exported to excitation regulator, reuse voltage measurement instrument and voltage feedback component to carry out wiring, switch protection circuit is switched on after wiring is finished, make voltage measurement instrument can insert three-phase alternating current power supply through voltage feedback component so as to measure the voltage value of working voltage, wherein the voltage value of working voltage is the same as the voltage value of synchronous voltage, equal to the voltage value of synchronous voltage of excitation regulator that has been measured, avoid the operator to cause electric shock accident because of live operation wiring in measuring the synchronous voltage of excitation regulator, the measurement safety is improved.
Description
Technical Field
The utility model belongs to the technical field of generator excitation and voltage regulation system nuclear power plant excitation system, especially, relate to a nuclear power plant excitation system, excitation regulator working power supply output circuit and power output circuit thereof.
Background
In an excitation system of a generator of a nuclear power plant, 220V three-phase alternating current output by a permanent magnet machine is supplied with synchronous voltage to an excitation regulator through an excitation switch on one hand, and is supplied with a working power supply to the excitation regulator through a transformer on the other hand, so that the output voltage quality of the excitation regulator can be directly influenced by the voltage quality output by the permanent magnet machine, and the output voltage quality of the generator is finally influenced, so that the output voltage of the permanent magnet machine needs to be collected and measured before the generator is started and connected to the grid, so that the quality of the output voltage of the permanent magnet machine is judged; in a traditional nuclear power plant excitation system, synchronous voltage can be measured only by wiring on a busbar at the output end of a permanent magnet machine, so that the measurement process belongs to live operation, the measurement has high requirement on the skill level of an operator, and the risk of electric shock of the operator easily occurs.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the present invention provides an excitation regulator working power supply output circuit, which aims to solve the problem of electric shock risk in the measurement of the synchronous voltage of the excitation regulator in the conventional technical solution.
The embodiment of the utility model provides a first aspect provides an excitation regulator working power supply output circuit, include:
the permanent magnet machine is used for outputting a three-phase alternating current power supply;
the transformer circuit is connected between the permanent magnet machine and the excitation regulator in series and used for converting the three-phase alternating current power supply into a working power supply and outputting the working power supply to the excitation regulator;
the switch protection circuit is connected between the permanent magnet machine and the transformer circuit in series and used for switching on and off a three-phase alternating current power supply between the permanent magnet machine and the transformer circuit; and
one end of the voltage feedback component is used for being connected with a voltage measuring instrument, and the other end of the voltage feedback component is connected to the output end of the switch protection circuit when the switch protection circuit is disconnected; the voltage feedback assembly is used for feeding back a three-phase alternating current power supply of the permanent magnet motor to the voltage measuring instrument when the switch protection circuit is conducted.
In a first aspect, in one embodiment, the transformer circuit includes a first transformer and a second transformer, the field regulator includes a first power input and a second power input that are redundantly arranged, and the switch protection circuit includes a first power output and a second power output that are redundantly arranged; the first transformer is connected in series between the first power output end of the switch protection circuit and the first power input end of the excitation regulator, and is used for converting a first two-phase alternating-current power supply output by the first power output end of the switch protection circuit into a first alternating-current working power supply and outputting the first alternating-current working power supply to the first power input end of the excitation regulator; the second transformer is connected in series between the second power output end of the switch protection circuit and the second power output end of the excitation regulator, and is used for converting a second two-phase alternating current power supply output by the second power output end of the switch protection circuit into a second alternating current working power supply and outputting the second alternating current working power supply to the second power output end of the excitation regulator.
In a first aspect, in one embodiment, the switch protection circuit includes a first switch circuit and a second switch circuit;
the input end of the first switch circuit inputs one path of two-phase alternating-current power supply of the three-phase alternating-current power supply, the input end of the second switch circuit inputs the other path of two-phase alternating-current power supply of the three-phase alternating-current power supply, the output end of the first switch circuit is the first power supply output end of the switch protection circuit and outputs the first two-phase alternating-current power supply, and the output end of the second switch circuit is the second power supply output end of the switch protection circuit and outputs the second two-phase alternating-current power supply;
the first switching circuit is used for switching on and off the first two-phase alternating-current power supply;
and the second switching circuit is used for switching on and off the second two-phase alternating current power supply.
In a first aspect, in one embodiment, the first switching circuit includes a first fuse assembly, an input of the first fuse assembly being an input of the first switching circuit, an output of the first fuse assembly being an output of the first switching circuit;
the second switch circuit includes a second fuse assembly, the input of the second fuse assembly is the input of the second switch circuit, the output of the second fuse assembly is the output of the second switch circuit.
In a first aspect, wherein an embodiment, the first fuse assembly includes a first fuse unit and a second fuse unit; the input end of the first fuse unit and the input end of the second fuse unit form the input end of the first fuse assembly, and the output end of the first fuse unit and the output end of the second fuse unit form the output end of the first fuse assembly;
the second fuse assembly includes a third fuse cell and a fourth fuse cell; the input of third fuse unit with the input of fourth fuse unit constitutes the input of second fuse subassembly, the output of third fuse unit with the output of fourth fuse unit constitutes the output of second fuse subassembly.
In a first aspect, in one embodiment, the voltage feedback assembly includes a first test terminal row, a second test terminal row, and a third test terminal row, the switch protection circuit includes a first phase output terminal, a second phase output terminal, and a third phase output terminal, and the first phase output terminal, the second phase output terminal, and the third phase output terminal respectively correspond to one of the phases of the three-phase ac power supply; the first test terminal strip, the second test terminal strip and the third test terminal strip are respectively and correspondingly connected in series between the first phase output end, the second phase output end and the third phase output end of the switch protection circuit and the voltage measuring instrument.
In a first aspect, in an embodiment, the excitation regulator working power supply output circuit further includes an output bus bar, and the output bus bar is connected in series between the permanent magnet machine and the switch protection circuit.
In a second aspect, a power supply output circuit of an excitation regulator is further provided, which includes a synchronous voltage output circuit and the excitation regulator working power supply output circuit as in any one of the embodiments of the first aspect, wherein the synchronous voltage output circuit is connected between the permanent magnet machine and the excitation regulator;
the synchronous voltage output circuit is used for transmitting the alternating current power supply output by the permanent magnet machine to the excitation regulator so as to provide synchronous voltage for the excitation regulator.
In a second aspect, in one embodiment, the synchronous voltage output circuit includes an excitation switch; the excitation switch is connected in series between the permanent magnet machine and the excitation regulator and used for switching on and off the synchronous voltage between the permanent magnet machine and the excitation regulator.
In a third aspect, there is also provided a nuclear power plant excitation system, comprising a permanent magnet machine, an excitation regulator, a first rectification assembly, a second rectification assembly, a main exciter, a generator, and the excitation regulator power output circuit of any of the embodiments of the second aspect;
the permanent magnet machine is connected with the excitation regulator through the excitation regulator power supply output circuit, the first rectifying assembly is connected between the excitation regulator and a main exciter in series, and the second rectifying assembly is connected between the main exciter and the generator in series;
the permanent magnet machine is used for outputting a three-phase alternating current power supply;
the excitation regulator power supply output circuit is used for converting the three-phase alternating current power supply into a working power supply and synchronous voltage and outputting the working power supply and the synchronous voltage to the excitation regulator;
the first rectifying assembly is used for rectifying the alternating current power output by the excitation regulator into direct current power and outputting the direct current power to a main exciter so as to excite and start the main exciter;
the second rectifying assembly is used for rectifying the alternating current power output by the main exciter into direct current power and outputting the direct current power to the generator so as to excite and start the generator.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: the excitation regulator working power supply output circuit can disconnect the switch protection circuit when measuring the voltage value of the working voltage output to the excitation regulator by the permanent magnet machine so as to disconnect the voltage feedback assembly from the three-phase alternating current power supply, then utilizes the voltage measuring instrument and the voltage feedback assembly for wiring, and then switches on the switch protection circuit after wiring is finished, so that the voltage measuring instrument can connect the three-phase alternating current power supply through the voltage feedback assembly to measure the voltage value of the working voltage.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic diagram of a first module structure of an output circuit of an excitation regulator working power supply according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a second module of an output circuit of an operating power supply of an excitation regulator according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a third module of an output circuit of an operating power supply of an excitation regulator according to an embodiment of the present application;
fig. 4 is a schematic structural diagram of a fourth module of an output circuit of an operating power supply of an excitation regulator according to an embodiment of the present application;
FIG. 5 is an exemplary circuit schematic diagram of an output circuit of an operating power supply of an excitation regulator according to an embodiment of the present application;
FIG. 6 is an exemplary circuit schematic diagram of an output circuit of an excitation regulator provided by an embodiment of the present application;
fig. 7 is a schematic structural diagram of an exemplary module of an excitation system of a nuclear power plant according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention 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 invention and are not intended to limit the invention.
Referring to fig. 1, a first module structure of an output circuit of a working power supply of an excitation regulator is provided in the present embodiment.
For convenience of explanation, only the parts related to the present embodiment are shown, and detailed as follows: the excitation regulator working power supply output circuit comprises a permanent magnet machine 110, a transformer circuit 130, a switch protection circuit 120 and a voltage feedback component 140; the permanent magnet machine 110 is used for outputting a three-phase alternating current power supply, the permanent magnet machine 110, the switch protection circuit 120 and the transformer circuit 130 are connected in series, the transformer circuit 130 is used for converting the three-phase alternating current power supply into a working power supply and outputting the working power supply to the excitation regulator 150, the switch protection circuit 120 is used for switching on and off the three-phase alternating current power supply between the permanent magnet machine 110 and the transformer circuit 130, one end of the voltage feedback component 140 is used for being connected with the voltage measuring instrument 160, the other end of the voltage feedback component 140 is connected to the output end of the switch protection circuit 120 when the switch protection circuit 120 is switched off, the other end of the voltage feedback component 140 can also be connected with the output end of the switch protection circuit 120 all the time, and the voltage feedback component 140 is used for feeding back the three-phase alternating current power supply.
In this embodiment, when the voltage value of the working voltage output to the excitation regulator 150 by the permanent magnet machine 110 is measured, the switch protection circuit 120 is turned off to disconnect the voltage feedback component 140 from the three-phase ac power supply, the voltage measurement instrument 160 is connected with the voltage feedback component 140, and after the connection is finished, the switch protection circuit 120 is turned on, so that the voltage measurement instrument 160 can connect the three-phase ac power supply through the voltage feedback component 140 to measure the voltage value of the working voltage, because the voltage value of the working voltage is the same as the voltage value of the synchronous voltage, the voltage value is equivalent to the voltage value of the synchronous voltage of the excitation regulator 150, and the electric shock accident caused by live operation of the connection when an operator measures the synchronous voltage of the excitation regulator 150 is avoided. The switch protection circuit 120 may be a circuit composed of electrical elements such as a circuit breaker, a fuse, an air switch, etc. and capable of implementing the function of the switch protection circuit 120 described in this embodiment, and the specific structure is a routine choice performed by those skilled in the art according to actual needs, and is not limited herein. The voltage feedback component 140 is a conductive medium, and specifically, the voltage feedback component 140 may be one of a cable, an electric wire, a copper bar, and the like.
Referring to fig. 2, in an embodiment of the disclosure, the transformer circuit 130 includes a first transformer 131 and a second transformer 132 that are redundant to each other, the excitation regulator 150 includes a first power input end and a second power input end that are redundant to each other, the switch protection circuit 120 includes a first power output end and a second power output end that are redundant to each other, the first transformer 131 is connected in series between the first power output end of the switch protection circuit 120 and the first power input end of the excitation regulator 150, the first transformer 131 is configured to convert a first two-phase ac power output from the first power output end of the switch protection circuit 120 into a first ac working power and output the first ac working power to the first power input end of the excitation regulator 150, the second transformer 132 is connected in series between the second power output end of the switch protection circuit 120 and the second power output end of the excitation regulator 150, and the second transformer 132 is configured to convert a second two-phase ac power output from the second power output end of the switch protection circuit 120 into a second ac working power And outputs the two ac operating power sources to a second power input terminal of the excitation regulator 150.
In an embodiment, for the excitation regulator 150 in the nuclear power plant, in order to improve the operating stability of the excitation regulator 150, the excitation regulator 150 may be provided with two sets of devices that are redundant to each other, the two sets of devices respectively correspond to the first power input end and the second power input end that are redundant to each other, the first ac working power supply enables one set of devices of the excitation regulator 150 to operate, the second ac working power supply enables the other set of devices of the excitation regulator 150 to operate, the first power output end and the second power output end that are redundant to each other are provided, and the first transformer 131 and the second transformer 132 that are redundant to each other are provided to improve the stability of the switch protection circuit 120 and the transformer circuit 130 and output the first ac working power supply and the second ac working power supply that are redundant to the excitation regulator 150, so as to meet the redundancy requirement of the excitation regulator 150 for the input power supply.
The first transformer 131 and the second transformer 132 may be dry-type transformers or oil-type transformers.
Referring to fig. 3, in an embodiment, the switch protection circuit 120 includes a first switch circuit 121 and a second switch circuit 122, one of two-phase ac power sources of a three-phase ac power source is input to an input terminal of the first switch circuit 121, the other of the two-phase ac power sources of the three-phase ac power source is input to an input terminal of the second switch circuit 122, an output terminal of the first switch circuit 121 is a first power output terminal of the switch protection circuit 120 and outputs a first two-phase ac power source, an output terminal of the second switch circuit 122 is a second power output terminal of the switch protection circuit 120 and outputs a second two-phase ac power source, the first switch circuit 121 is configured to turn on/off the first two-phase ac power source, and the second switch circuit 122 is configured to turn on/off the second two-phase ac power source.
In the present embodiment, the first switching circuit 121 controls whether the first two-phase ac power output by the permanent magnet machine 110 is output to the first transformer 131, and the second switching circuit 122 controls whether the second two-phase ac power output by the permanent magnet machine 110 is output to the second transformer 132.
Preferably, the first two-phase ac power source and the second two-phase ac power source have different power sources, that is, when the first two-phase ac power source is from the a phase and the B phase of the three-phase ac power source, the second two-phase ac power source is from the C phase and one of the a phase and the B phase of the three-phase ac power source, so as to improve the stability of the input power of the switching protection circuit 120.
Referring to fig. 4, in one embodiment, the first switch circuit 121 includes a first fuse element 123, an input terminal of the first fuse element 123 is an input terminal of the first switch circuit 121, an output terminal of the first fuse element 123 is an output terminal of the first switch circuit 121, the second switch circuit 122 includes a second fuse element 124, an input terminal of the second fuse element 124 is an input terminal of the second switch circuit 122, and an output terminal of the second fuse element 124 is an output terminal of the second switch circuit 122.
In this embodiment, the first fuse assembly 123 and the second fuse assembly 124 can perform the function of disconnecting the isolation loop, and at the same time, can perform the function of protection when the loop is overloaded.
The first fuse component 123 and the second fuse component 124 may be both fuses and control elements, and the specific structure thereof is a routine choice performed by those skilled in the art according to actual needs, and is not limited herein.
Referring to fig. 5, in one embodiment, the first fuse assembly 123 includes a first fuse unit FU1 and a second fuse unit FU2, an input terminal of the first fuse unit FU1 and an input terminal of the second fuse unit FU2 constitute an input terminal of the first fuse assembly 123, an output terminal of the first fuse unit FU1 and an output terminal of the second fuse unit FU2 constitute an output terminal of the first fuse assembly 123, and the second fuse assembly 124 includes a third fuse unit FU3 and a fourth fuse unit FU 4; the input of the third fuse cell FU3 and the input of the fourth fuse cell FU4 form an input of the second fuse assembly 124, and the output of the third fuse cell FU3 and the output of the fourth fuse cell FU4 form an output of the second fuse assembly 124;
in the present embodiment, the input terminal of the first fuse unit FU1 is connected to one of the first two-phase ac power outputs of the permanent magnet machine 110, the input terminal of the second fuse unit FU2 is connected to the other of the first two-phase ac power outputs of the permanent magnet machine 110, wherein the output terminal of the first fuse unit FU1 is connected to one of the primary winding taps of the first transformer 131, the output terminal of the second fuse unit FU2 is connected to the other of the primary winding taps of the first transformer 131, wherein the output terminal of the third fuse unit FU3 is connected to one of the second two-phase ac power outputs of the permanent magnet machine 110, the output terminal of the fourth fuse unit FU4 is connected to the other of the second two-phase ac power outputs of the permanent magnet machine 110, wherein the output terminal of the third fuse unit FU3 is connected to one of the primary winding taps of the second transformer 132, the output terminal of the fourth fuse unit FU4 is connected to the other of the primary winding taps of the second transformer, the first fuse unit FU1 and the second fuse unit FU2 are arranged, so that the minimum unit for replacing the maintenance device of the first fuse assembly 123 can be reduced, one line can be flexibly controlled to be switched on or switched off according to needs, and the third fuse unit FU3 and the fourth fuse unit FU4 are arranged, the minimum unit for replacing the maintenance device of the second fuse assembly 124 can be reduced, and one line can be flexibly controlled to be switched off.
Referring to fig. 5, in an embodiment, the voltage feedback assembly 140 includes a first test terminal row E1, a second test terminal row E2, and a third test terminal row E3, the switch protection circuit 120 includes a first phase output terminal, a second phase output terminal, and a third phase output terminal, the first phase output terminal, the second phase output terminal, and the third phase output terminal respectively correspond to one phase of the three-phase ac power, and the first test terminal row E1, the second test terminal row E2, and the third test terminal row E3 are respectively connected in series between the first phase output terminal, the second phase output terminal, and the third phase output terminal of the switch protection circuit 120 and the voltage measurement instrument 160.
In the present embodiment, the voltage measuring instrument 160 can measure the line voltages of any two phases of the three-phase ac power through the first test terminal row E1, the second test terminal row E2, and the third test terminal row E3, reducing the number of terminal rows.
Wherein, the first test terminal row E1, the second test terminal row E2 and the third test terminal row E3 can be one of cables, copper bars, electric wires and the like.
Referring to fig. 5, in an embodiment of the invention, the working power output circuit of the excitation regulator further includes an output bus bar 170, and the output bus bar 170 is connected in series between the permanent magnet machine 110 and the switch protection circuit 120.
Referring to fig. 6, an embodiment of a power output circuit of an excitation regulator is provided, where the power output circuit of the excitation regulator includes a synchronous voltage output circuit and an output circuit of a working power supply of the excitation regulator in any of the above embodiments, and a specific structure of the output circuit of the working power supply of the excitation regulator refers to the above embodiments. Wherein, the synchronous voltage output circuit is connected between the permanent magnet machine 110 and the excitation regulator 150; and a synchronous voltage output circuit, configured to transmit the ac power output by the permanent magnet machine 110 to the excitation regulator 150 to provide a synchronous voltage for the excitation regulator 150.
Referring to fig. 6, in one embodiment, the synchronous voltage output circuit includes an excitation switch 180; the excitation switch 180 is connected in series between the permanent magnet machine 110 and the excitation regulator 150, and is used for switching on and off the synchronous voltage between the permanent magnet machine 110 and the excitation regulator 150 when necessary.
Referring to fig. 7, an embodiment of a nuclear power plant excitation system is provided, where the nuclear power plant excitation system is used in a nuclear power plant or other types of power plants, the nuclear power plant excitation system includes a permanent magnet machine 110, an excitation regulator 150, a first rectifying component 210, a second rectifying component 230, a main exciter 220, a generator 240, and an excitation regulator power output circuit according to any one of the above embodiments, and a specific structure of the excitation regulator working power output circuit refers to the above embodiments. The permanent magnet machine 110 is connected with the excitation regulator 150 through an excitation regulator power supply output circuit, the first rectifying assembly 210 is connected between the excitation regulator 150 and the main exciter 220 in series, and the second rectifying assembly 230 is connected between the main exciter 220 and the generator 240 in series; the permanent magnet machine 110 is configured to output a three-phase ac power, the excitation regulator power output circuit is configured to convert the three-phase ac power into an operating power and a synchronous voltage and output the operating power and the synchronous voltage to the excitation regulator 150, the first rectifying assembly 210 is configured to rectify the ac power output by the excitation regulator 150 into a dc power and output the dc power to the main exciter 220 for excitation, and the second rectifying assembly 230 is configured to rectify the ac power output by the main exciter 220 into a dc power and output the dc power to the generator 240 for excitation.
In the embodiment, by providing the excitation regulator power output circuit, when the voltage value of the working voltage output to the excitation regulator 150 by the permanent magnet machine 110 is measured, the switch protection circuit 120 is switched off to disconnect the voltage feedback component 140 from the three-phase alternating current power supply, the voltage measurement instrument 160 is connected with the voltage feedback component 140, and the switch protection circuit 120 is switched on after the connection is finished, so that the voltage measurement instrument 160 can connect the three-phase alternating current power supply through the voltage feedback component 140 to measure the voltage value of the working voltage, because the voltage value of the working voltage is the same as the voltage value of the synchronous voltage, the voltage value is equal to the voltage value of the synchronous voltage of the excitation regulator 150, and the situation that an operator gets an electric shock when measuring the synchronous voltage of the excitation regulator 150 due to live operation of the connection is avoided.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. Excitation regulator working power supply output circuit, characterized by includes:
the permanent magnet machine is used for outputting a three-phase alternating current power supply;
the transformer circuit is connected between the permanent magnet machine and the excitation regulator in series and used for converting the three-phase alternating current power supply into a working power supply and outputting the working power supply to the excitation regulator;
the switch protection circuit is connected between the permanent magnet machine and the transformer circuit in series and used for switching on and off a three-phase alternating current power supply between the permanent magnet machine and the transformer circuit; and
one end of the voltage feedback component is used for being connected with a voltage measuring instrument, and the other end of the voltage feedback component is connected to the output end of the switch protection circuit when the switch protection circuit is disconnected; the voltage feedback assembly is used for feeding back a three-phase alternating current power supply of the permanent magnet motor to the voltage measuring instrument when the switch protection circuit is conducted.
2. The excitation regulator operating power supply output circuit of claim 1, wherein the transformer circuit comprises a first transformer and a second transformer, the excitation regulator comprises a first power supply input and a second power supply input that are redundantly arranged, and the switch protection circuit comprises a first power supply output and a second power supply output that are redundantly arranged;
the first transformer is connected in series between the first power output end of the switch protection circuit and the first power input end of the excitation regulator, and is used for converting a first two-phase alternating-current power supply output by the first power output end of the switch protection circuit into a first alternating-current working power supply and outputting the first alternating-current working power supply to the first power input end of the excitation regulator;
the second transformer is connected in series between the second power output end of the switch protection circuit and the second power output end of the excitation regulator, and is used for converting a second two-phase alternating current power supply output by the second power output end of the switch protection circuit into a second alternating current working power supply and outputting the second alternating current working power supply to the second power output end of the excitation regulator.
3. The output circuit of an operating power supply of an excitation regulator as claimed in claim 2,
the switch protection circuit comprises a first switch circuit and a second switch circuit;
the input end of the first switch circuit inputs one path of two-phase alternating-current power supply of the three-phase alternating-current power supply, the input end of the second switch circuit inputs the other path of two-phase alternating-current power supply of the three-phase alternating-current power supply, the output end of the first switch circuit is the first power supply output end of the switch protection circuit and outputs the first two-phase alternating-current power supply, and the output end of the second switch circuit is the second power supply output end of the switch protection circuit and outputs the second two-phase alternating-current power supply;
the first switching circuit is used for switching on and off the first two-phase alternating-current power supply;
and the second switching circuit is used for switching on and off the second two-phase alternating current power supply.
4. The excitation regulator operating power supply output circuit of claim 3, wherein the first switching circuit comprises a first fuse component, an input of the first fuse component being an input of the first switching circuit, an output of the first fuse component being an output of the first switching circuit;
the second switch circuit includes a second fuse assembly, the input of the second fuse assembly is the input of the second switch circuit, the output of the second fuse assembly is the output of the second switch circuit.
5. The output circuit of an operating power supply for an excitation regulator of claim 4,
the first fuse assembly includes a first fuse cell and a second fuse cell; the input end of the first fuse unit and the input end of the second fuse unit form the input end of the first fuse assembly, and the output end of the first fuse unit and the output end of the second fuse unit form the output end of the first fuse assembly;
the second fuse assembly includes a third fuse cell and a fourth fuse cell; the input of third fuse unit with the input of fourth fuse unit constitutes the input of second fuse subassembly, the output of third fuse unit with the output of fourth fuse unit constitutes the output of second fuse subassembly.
6. The excitation regulator operating power supply output circuit of claim 1, wherein the voltage feedback assembly comprises a first test terminal row, a second test terminal row, and a third test terminal row, and wherein the switch protection circuit comprises a first phase output, a second phase output, and a third phase output, each of the first phase output, the second phase output, and the third phase output corresponding to one of the phases of the three-phase ac power supply; the first test terminal strip, the second test terminal strip and the third test terminal strip are respectively and correspondingly connected in series between the first phase output end, the second phase output end and the third phase output end of the switch protection circuit and the voltage measuring instrument.
7. The excitation regulator operating power supply output circuit as claimed in claim 1, further comprising an output bus bar connected in series between the permanent magnet machine and the switch protection circuit.
8. An excitation regulator power supply output circuit, comprising a synchronous voltage output circuit and an excitation regulator operating power supply output circuit as claimed in any one of claims 1 to 7, wherein the synchronous voltage output circuit is connected between the permanent magnet machine and the excitation regulator;
the synchronous voltage output circuit is used for transmitting the alternating current power supply output by the permanent magnet machine to the excitation regulator so as to provide synchronous voltage for the excitation regulator.
9. The field regulator power supply output circuit of claim 8, wherein the synchronous voltage output circuit comprises a field switch;
the excitation switch is connected in series between the permanent magnet machine and the excitation regulator and used for switching on and off the synchronous voltage between the permanent magnet machine and the excitation regulator.
10. A nuclear power plant excitation system comprising a permanent magnet machine, a field regulator, a first rectifying assembly, a second rectifying assembly, a main exciter, a generator and a field regulator power output circuit as claimed in claim 8 or 9;
the permanent magnet machine is connected with the excitation regulator through the excitation regulator power supply output circuit, the first rectifying assembly is connected between the excitation regulator and a main exciter in series, and the second rectifying assembly is connected between the main exciter and the generator in series;
the permanent magnet machine is used for outputting a three-phase alternating current power supply;
the excitation regulator power supply output circuit is used for converting the three-phase alternating current power supply into a working power supply and synchronous voltage and outputting the working power supply and the synchronous voltage to the excitation regulator;
the first rectifying assembly is used for rectifying the alternating current power output by the excitation regulator into direct current power and outputting the direct current power to a main exciter so as to excite and start the main exciter;
the second rectifying assembly is used for rectifying the alternating current power output by the main exciter into direct current power and outputting the direct current power to the generator so as to excite and start the generator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021761303.2U CN212726900U (en) | 2020-08-21 | 2020-08-21 | Nuclear power plant excitation system, excitation regulator working power supply and power supply output circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021761303.2U CN212726900U (en) | 2020-08-21 | 2020-08-21 | Nuclear power plant excitation system, excitation regulator working power supply and power supply output circuit |
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| CN212726900U true CN212726900U (en) | 2021-03-16 |
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| CN202021761303.2U Active CN212726900U (en) | 2020-08-21 | 2020-08-21 | Nuclear power plant excitation system, excitation regulator working power supply and power supply output circuit |
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