CN211296609U - Control loop of generator excitation control system - Google Patents
Control loop of generator excitation control system Download PDFInfo
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- CN211296609U CN211296609U CN201922471326.3U CN201922471326U CN211296609U CN 211296609 U CN211296609 U CN 211296609U CN 201922471326 U CN201922471326 U CN 201922471326U CN 211296609 U CN211296609 U CN 211296609U
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Abstract
The utility model provides a generator excitation control system's control circuit is applied to generator excitation control system, and generator excitation control system is including automatic voltage regulator group and the control circuit who links to each other with automatic voltage regulator, and automatic voltage regulator group's input passes through circuit breaker QF1 and contactor switch K1 and links to each other with power input circuit, and the output links to each other with the exciter through a mechanical shutting auxiliary switch group KB and carries out excitation output control, control circuit is including first automatic voltage regulator RE1 control circuit, second automatic voltage regulator RE2 control circuit, protection circuit and manual regulation circuit that connect in parallel each other. Based on the mutual cooperation among all circuits in the control loop, the control loop has manual and automatic dual regulation and protection functions, thereby realizing better control and protection to the exciter output.
Description
Technical Field
The utility model belongs to the technical field of generator excitation system technique and specifically relates to a generator excitation control system's control circuit.
Background
Excitation is a machine that provides a stator power supply to a generator or a synchronous motor stator and provides a working magnetic field for the generator or the like (an electrical device that operates on the principle of electromagnetic induction). The excitation control device is an indispensable part in the working process of the generator, and the control on excitation directly influences the working stability and efficiency of the generator. At present, excitation is generally controlled by an Automatic Voltage Regulator (AVR) in the market, and a set of control system is provided for controlling and protecting the automatic voltage regulator, and the function of the control system indirectly determines the working state of the generator. Therefore, how to achieve better control and protection of the automatic voltage regulator is a problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a generator excitation control system's control circuit.
The utility model provides a its technical problem take following technical scheme to realize:
a control loop of a generator excitation control system is applied to the generator excitation control system, the generator excitation control system comprises an automatic voltage regulator group and a control loop connected with an automatic voltage regulator, the input end of the automatic voltage regulator group is connected with a power input circuit through a circuit breaker QF1 and a contactor switch K1, the output end of the automatic voltage regulator group is connected with an exciter through a mechanical locking auxiliary switch group KB to carry out excitation output control, and the control loop comprises a first automatic voltage regulator RE1 control circuit, a second automatic voltage regulator RE2 control circuit, a protection circuit and a manual adjusting circuit which are connected in parallel.
Preferably, the set of automatic voltage regulators is divided into a first automatic voltage regulator RE1 and a second automatic voltage regulator RE2, the set of mechanical latching auxiliary switches KB is controlled by a set of mechanical latching modules KB, the set of mechanical latching modules KB is divided into a first latching relay KB1 and a second latching relay KB2, and the set of mechanical latching auxiliary switches KB is divided into a first latching auxiliary switch KB11 and a second latching auxiliary switch KB 21.
Preferably, the control circuit of the first automatic voltage regulator RE1 comprises a first switching branch and a first switching control branch, wherein the first switching control branch comprises a first switching control relay K4 and a first automatic voltage regulator RE1 connected with the first switching control relay K4, the first switching branch comprises a first latching relay KB1, a first switching control first auxiliary switch K41 connected with the first latching relay KB1 in series, a first button N1 and a second switching control first auxiliary switch K51, and the first button N1 and the second switching control first auxiliary switch K51 are mutually connected in parallel and are respectively connected with the first switching control first auxiliary switch K41 in series.
Preferably, the second automatic voltage regulator RE2 control circuit comprises a second switching branch and a second switching control branch, the second switching control branch comprises a second switching control relay K5 and a second automatic voltage regulator RE2 connected with the second switching control relay K5, the second switching branch comprises a second latching relay KB2, a second switching control second auxiliary switch K52 connected with the second latching relay KB2 in series, a second button N2 and a first switching control second auxiliary switch K42, and the second button N2 is connected with the first switching control second auxiliary switch K42 in parallel and respectively connected with the second switching control second auxiliary switch K52 in series.
Preferably, the protection circuit comprises a breaker state branch, an overvoltage state branch and an overvoltage protection branch and an alarm circuit;
the breaker state branch comprises a breaker state relay K3 and a breaker closing auxiliary switch VCB which are connected in series;
the overvoltage state branch circuit comprises an overvoltage state relay K8 and an overvoltage protection auxiliary switch RP3 which are connected in series;
the overvoltage protection branch comprises a breaker opening relay QF1, a breaker state auxiliary switch K3 and an overvoltage state auxiliary switch K8 which are connected in series;
the alarm circuit comprises an alarm relay K10 and an automatic voltage regulator group which are connected in series.
Preferably, the manual regulating circuit comprises a voltage boosting regulating branch, a voltage reducing regulating branch, an FCR mode switching circuit and an AVR mode switching circuit;
the boosting regulation branch comprises a boosting relay K11 and a boosting control switch XB1 which are connected in series;
the voltage reduction regulating branch comprises a voltage reduction relay K12 and a voltage reduction control switch XB2 which are connected in series;
the FCR mode switching circuit comprises an FCR mode relay K13 and an FCR mode control switch XB3 which are connected in series;
the AVR mode switching circuit comprises an AVR mode relay K14 and an AVR mode control switch XB4 which are connected in series.
Preferably, the control circuit of the generator excitation control system further comprises a starting circuit.
Preferably, the starting circuit is composed of a starting control branch and a starting branch;
the starting control branch comprises a starting control switch XC1 and a starting control relay K15 which are connected in series;
the starting branch circuit comprises a contactor coil K1, an automatic voltage regulator group and a starting control auxiliary switch K15 which are connected in series.
Preferably, the control circuit of the generator excitation control system further comprises an indicating circuit, and the indicating circuit comprises a first indicating branch, a second indicating branch and an alarm indicating branch.
Preferably, the control loop of the generator excitation control system further comprises a power supply circuit for supplying power to the first automatic voltage regulator RE1 and the second automatic voltage regulator RE 2.
The utility model has the advantages that:
the utility model provides a generator excitation control system's control circuit is applied to generator excitation control system, and generator excitation control system is including automatic voltage regulator group and the control circuit who links to each other with automatic voltage regulator, and automatic voltage regulator group's input passes through circuit breaker QF1 and contactor switch K1 and links to each other with power input circuit, and the output links to each other with the exciter through a mechanical shutting auxiliary switch group KB and carries out excitation output control, control circuit is including first automatic voltage regulator RE1 control circuit, second automatic voltage regulator RE2 control circuit, protection circuit and manual regulation circuit that connect in parallel each other. Based on the mutual cooperation among all circuits in the control loop, the control loop has manual and automatic dual regulation and protection functions, thereby realizing better control and protection to the exciter output.
Drawings
Fig. 1 is a schematic structural diagram of a generator excitation control system of the present invention;
fig. 2 is a schematic diagram of a first portion of a control loop of the present invention;
fig. 3 is a schematic diagram of a second portion of the control loop of the present invention;
fig. 4 is a schematic diagram of a third portion of the control circuit of the present invention;
fig. 5 is a schematic structural diagram of the automatic voltage regulator group of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail with reference to the accompanying drawings:
as shown in fig. 1, fig. 2, fig. 3, fig. 4, the utility model provides a generator excitation control system's control circuit is applied to generator excitation control system, generator excitation control system including automatic voltage regulator group and the control circuit who links to each other with automatic voltage regulator, the input of automatic voltage regulator group passes through circuit breaker QF1 and contactor switch K1 and links to each other with power input circuit, the output links to each other with the exciter through a mechanical shutting auxiliary switch group KB and carries out excitation output control, the input of automatic voltage regulator group still links to each other has a detection circuitry, automatic voltage regulator group can control excitation output voltage according to the signal that detects the return circuit output to the realization is to the control of generator terminal voltage. The control loop comprises a first automatic voltage regulator RE1 control circuit, a second automatic voltage regulator RE2 control circuit, a protection circuit and a manual regulation circuit which are connected in parallel, and the control loop is used for controlling and protecting the automatic voltage regulator group. When the circuit is in a non-working state, the breaker QF1 and the contactor switch K1 are normally open switches.
Further, as shown in fig. 1, 2 and 5, the set of automatic voltage regulators is divided into a first automatic voltage regulator RE1 and a second automatic voltage regulator RE2, the set of mechanical latching auxiliary switches KB is controlled by a set of mechanical latching modules KB, the set of mechanical latching modules KB is divided into a first latching relay KB1 and a second latching relay KB2, the set of mechanical latching auxiliary switches KB is divided into a first latching auxiliary switch KB11 and a second latching auxiliary switch KB21, and the first latching auxiliary switch KB11 is linked with the second latching auxiliary switch KB21, that is, one and only one of the first automatic voltage regulator RE1 and the second automatic voltage regulator RE2 can be operated at the same time. It should be noted that the first automatic voltage regulator RE1 and the second automatic voltage regulator RE2 have the same structure.
Further, as shown in fig. 1 and 2, the control circuit of the first automatic voltage regulator RE1 includes a first switching branch and a first switching control branch, the first switching control branch includes a first switching control relay K4 and a first automatic voltage regulator RE1 connected thereto, the first switching branch includes a first latching relay KB1, a first switching control first auxiliary switch K41 connected in series with the first latching relay KB1, a first push button N1 and a second switching control first auxiliary switch K51, and the first push button N1 and the second switching control first auxiliary switch K51 are connected in parallel with each other and connected in series with the first switching control first auxiliary switch K41 respectively.
Further, as shown in fig. 1 and fig. 2, the second automatic voltage regulator RE2 includes a second switching branch and a second switching control branch, the second switching control branch includes a second switching control relay K5 and a second automatic voltage regulator RE2 connected thereto, the second switching branch includes a second latching relay KB2, a second switching control second auxiliary switch K52 connected in series with the second latching relay KB2, a second button N2 and a first switching control second auxiliary switch K42, and the second button N2 is connected in parallel with the first switching control second auxiliary switch K42 and connected in series with the second switching control second auxiliary switch K52.
Specifically, in an embodiment of the present invention, when the circuit is in the non-operating state, the first switching control first auxiliary switch K41 and the second switching control second auxiliary switch K52 are normally closed contacts, and the second switching control first auxiliary switch K51 and the first switching control second auxiliary switch K42 are normally open contacts. When the first automatic voltage regulator RE1 operates, the first latching auxiliary switch KB11 is in a closed state, at this time, if the first automatic voltage regulator RE1 fails, a normally open contact between the insides of the pins 51 to 52 of the first automatic voltage regulator RE1 is closed, the first switching control relay K4 is energized, the first switching control first auxiliary switch K41 is opened, the first switching control second auxiliary switch K42 is closed, the second switching branch is turned on, the second latching auxiliary switch KB21 is energized, the second latching auxiliary switch KB21 is closed at this time, and the first latching auxiliary switch KB11 is opened, so that the first automatic voltage regulator RE1 stops operating, and the second automatic voltage regulator RE2 starts operating to ensure that the circuit operates normally; on the contrary, when the second automatic voltage regulator RE2 operates, the second latching auxiliary switch KB21 is in a closed state, and at this time, if the second automatic voltage regulator RE2 fails, the normally open contact between the inside of pins 51-52 of the second automatic voltage regulator RE2 is closed, the second switching control relay K5 is energized, the second switching control second auxiliary switch K52 is opened, the second switching control first auxiliary switch K51 is closed, the first switching branch is turned on, the first latching auxiliary switch KB11 is energized, at this time, the 1 st latching auxiliary switch KB11 is closed, and the second latching auxiliary switch KB21 is opened, so that the second automatic voltage regulator RE2 stops operating, and the first automatic voltage regulator RE1 starts to operate to ensure that the circuit operates normally. Meanwhile, the first automatic voltage regulator RE1 and the second automatic voltage regulator RE2 can also be switched manually, when a first button N1 is pressed, the first switching branch is conducted, the circuit can be switched from the second automatic voltage regulator RE2 to the first automatic voltage regulator RE1 to work, when a second button is pressed, the second switching branch is conducted, the circuit can be switched from the first automatic voltage regulator RE1 to the second automatic voltage regulator RE2 to work, so that double combination of manual operation and automation is achieved, and a better control effect of the automatic voltage regulator group is achieved.
Further, as shown in fig. 1, 3 and 4, the protection circuit includes a breaker state branch, an overvoltage state branch and an overvoltage protection branch, and an alarm circuit;
the breaker state branch comprises a breaker state relay K3 and a breaker closing auxiliary switch VCB which are connected in series; when the circuit is in a non-working state, the circuit breaker closing auxiliary switch VCB is a normally open switch, and when the circuit breaker QF1 is closed, the circuit breaker closing auxiliary switch VCB is closed.
The overvoltage state branch circuit comprises an overvoltage state relay K8 and an overvoltage protection auxiliary switch RP3 which are connected in series; when the circuit is in a non-working state, the overvoltage protection auxiliary switch RP3 is a normally open switch.
The overvoltage protection branch comprises a breaker opening relay QF1, a breaker state auxiliary switch K3 and an overvoltage state auxiliary switch K8 which are connected in series; when the circuit is in a non-working state, the breaker state auxiliary switch K3 and the overvoltage state auxiliary switch K8 are normally open switches.
The alarm circuit comprises an alarm relay K10 and an automatic voltage regulator group which are connected in series.
Specifically, in an embodiment of the present invention, the detection circuit is connected to an overvoltage protection relay RP3, and the detection circuit is connected to the generator outgoing line terminal for detecting the voltage at the generator terminal and transmitting data to the automatic voltage regulator set for regulation. When the voltage of the generator terminal is detected to be too high, the overvoltage protection relay RP3 is electrified, the overvoltage protection auxiliary switch RP3 is closed, the overvoltage state relay K8 is electrified, the overvoltage state auxiliary switch K8 is closed, if the breaker QF1 is in a closing state at the moment, the breaker state relay K3 is electrified, the breaker state auxiliary switch K3 is also closed, the overvoltage protection branch is conducted at the moment, the breaker opening relay QF1 is electrified to enable the breaker QF1 to be opened, and therefore the circuit is protected in an emergency mode by crossing over the automatic voltage regulator.
Further, as shown in fig. 1, 4, and 5, the manual regulating circuit includes a voltage boosting regulating branch, a voltage dropping regulating branch, an FCR mode switching circuit, and an AVR mode switching circuit;
the boosting regulation branch comprises a boosting relay K11 and a boosting control switch XB1 which are connected in series;
the voltage reduction regulating branch comprises a voltage reduction relay K12 and a voltage reduction control switch XB2 which are connected in series;
the FCR mode switching circuit comprises an FCR mode relay K13 and an FCR mode control switch XB3 which are connected in series;
the AVR mode switching circuit comprises an AVR mode relay K14 and an AVR mode control switch XB4 which are connected in series.
Specifically, in an embodiment of the present invention, a boost auxiliary switch K11, a buck auxiliary switch K12, an FCR mode auxiliary switch K13, and an AVR mode auxiliary switch K14 are disposed in the automatic voltage regulator circuit. When the circuit is in a non-working state, the boosting control switch XB1, the voltage reduction control switch XB2, the AVR mode control switch XB3, the AVR mode control switch XB4, the boosting auxiliary switch K11, the voltage reduction auxiliary switch K12, the FCR mode auxiliary switch K13 and the AVR mode auxiliary switch K14 are all normally open switches. When the preset value of the voltage of the generator terminal needs to be changed or temporary emergency regulation is needed, if the voltage needs to be increased, the boosting control switch XB1 is only needed to be closed to electrify the boosting relay K11, so that the boosting auxiliary switch K11 is closed, and the automatic voltage regulator group can perform boosting operation; when wanting to reduce voltage, only need closed step-down control switch XB2 to make step-down relay K12 circular telegram for step-down auxiliary switch K12 is closed, and the automatic voltage regulator group can carry out the step-down operation. Meanwhile, the manual regulating circuit can also manually select an operation mode through manual operation, when an FCR (manual) mode is needed, only the FCR mode control switch XB3 needs to be closed to electrify the FCR mode relay K13, so that the FCR mode auxiliary switch K13 is closed, and the automatic voltage regulator set can stop working and is changed into manual operation; when the AVR (automatic) mode is needed, the AVR mode control switch XB4 is only needed to be closed to enable the AVR mode relay K14 to be electrified, so that the AVR mode auxiliary switch K14 is closed, and the automatic voltage regulator set can automatically work. Based on the mutual cooperation among the branches, the automatic/manual operation of the control loop can be freely selected, and meanwhile, the automatic adjustment and the manual further adjustment can be carried out simultaneously, so that the voltage of the generator terminal can be better adjusted.
Further, as shown in the figure, the control loop of the generator excitation control system further comprises a starting circuit.
Further, as shown in fig. 4 and 5, the starting circuit is composed of a starting control branch and a starting branch;
the starting control branch comprises a starting control switch XC1 and a starting control relay K15 which are connected in series;
the starting branch circuit comprises a contactor coil K1, an automatic voltage regulator group and a starting control auxiliary switch K15 which are connected in series.
It is added that a start-up control second auxiliary switch K151 is connected in series between pins 1 and 2 of the automatic voltage regulator group.
Specifically, in an embodiment of the present invention, when the circuit is in the non-operating state, the start control auxiliary switch K15 is a normally open switch. The starting control switch XC1 is controlled by a remote terminal, when the exciter needs to be controlled, the remote terminal controls the starting control switch XC1 to be closed, the starting control relay K15 is electrified, the starting control auxiliary switch K15 is closed, if any automatic voltage regulator in the automatic voltage regulator group is normal at the moment, a built-in switch between pins 53-54 of the automatic voltage regulator group is closed, the starting branch is conducted, the contactor coil K1 is electrified, the contactor switch K1 is closed, the circuit is conducted, and the starting control second auxiliary switch K151 is also closed at the moment, so that the automatic voltage regulator group is started, and the automatic voltage regulator group is controlled to work.
Further, as shown in fig. 2, 3, and 4, the control loop of the generator excitation control system further includes an indication circuit, where the indication circuit includes a first indication branch, a second indication branch, and an alarm indication branch.
Specifically, in an embodiment of the present invention, the first indication branch comprises a first indication control branch and a first indicator light branch, the first indication control branch comprises a first indication control relay K7 and a third locking auxiliary switch KB12 connected in series, and the first indicator light branch comprises a first indicator light G1 and a first indication control auxiliary switch K7; the second indication branch consists of a second indication control branch and a second indicator light branch which are connected in parallel, the second indication control branch consists of a second indication control relay K6 and a fourth locking auxiliary switch KB22 which are connected in series, and the second indicator light branch consists of a second indicator light G2 and a second indication control auxiliary switch K6; the third latching auxiliary switch KB12 is linked with the fourth latching auxiliary switch KB 22. When the circuit is in a non-working state, the first indication control auxiliary switch K7 and the second indication control auxiliary switch K6 are normally open switches. When the first automatic voltage regulator RE1 works, the third latching auxiliary switch KB12 is closed, the first indication control relay K7 is energized, the first indication control auxiliary switch K7 is closed, the first indicator light branch is turned on, and the first indicator light G1 is turned on for indication; when the second automatic voltage regulator RE2 works, the fourth latching auxiliary switch KB22 is closed, the second indicator control relay K6 is energized, the second indicator control auxiliary switch K6 is closed, the second indicator lamp circuit is conducted, and the second indicator lamp G2 is turned on for indication. The alarm indication branch circuit is composed of an alarm auxiliary switch K10 and an alarm indicator lamp N4, and when the circuit is in a non-working state, the alarm auxiliary switch K10 is a normally open switch. When the automatic voltage regulator group breaks down, the built-in switches among the pins 57 to 58 of the automatic voltage regulator group are closed, the alarm relay K10 is electrified, the alarm auxiliary switch K10 is closed, and the alarm indicator lamp N4 is turned on to indicate that the fault occurs.
Further, as shown in fig. 2 and fig. 3, the control loop of the generator excitation control system further includes a power supply circuit for supplying power to the first automatic voltage regulator RE1 and the second automatic voltage regulator RE 2.
In an embodiment of the present invention, the input end of the automatic voltage regulator set is connected to the power input circuit through the circuit breaker QF1 and the contactor switch K1, and the output end is connected to the exciter through a mechanical locking auxiliary switch set KB to control the excitation output, the input end of the automatic voltage regulator set is also connected to a detection circuit, the automatic voltage regulator set can control the excitation output voltage according to the signal of the detection loop output, thereby realizing the control of the generator terminal voltage. The control loop of the generator excitation control system is used for protecting the automatic voltage regulator group, and comprises a first automatic voltage regulator RE1 control circuit, a second automatic voltage regulator RE2 control circuit, a protection circuit and a manual regulation circuit which are connected in parallel; the control circuit of the first automatic voltage regulator RE1 and the control circuit of the second automatic voltage regulator RE2 can be switched manually or automatically when the first automatic voltage regulator RE1 or the second automatic voltage regulator RE2 fails, so that an automatic voltage regulator always exists in the circuit and works to ensure the normal output of an exciter; the protection circuit can carry out emergency protection on the circuit by opening the breaker QF1 when the voltage of the generator terminal is overhigh, so that a control loop, an exciter and a generator are better protected; the manual regulating circuit can be operated by a person to manually regulate the voltage of the generator to be increased and reduced and can automatically switch the working mode (AVR/FCR mode) of the control loop; based on the mutual matching of the circuits, the control loop has the functions of manual and automatic dual regulation and protection, so that the better control and protection of the output of the exciter are realized.
It should be emphasized that the embodiments described herein are illustrative and not restrictive, and thus the present invention is not limited to the embodiments described in the detailed description, but also falls within the scope of the present invention, in any other embodiments derived by those skilled in the art according to the technical solutions of the present invention.
Claims (10)
1. A control loop of a generator excitation control system is applied to the generator excitation control system and is characterized in that: the generator excitation control system comprises an automatic voltage regulator group and a control loop connected with the automatic voltage regulator, wherein the input end of the automatic voltage regulator group is connected with a power input circuit through a breaker QF1 and a contactor switch K1, the output end of the automatic voltage regulator group is connected with an exciter through a mechanical locking auxiliary switch group KB to perform excitation output control, and the control loop comprises a first automatic voltage regulator RE1 control circuit, a second automatic voltage regulator RE2 control circuit, a protection circuit and a manual regulation circuit which are connected in parallel.
2. The control loop of the generator excitation control system of claim 1, characterized by: the set of automatic voltage regulators is divided into a first automatic voltage regulator RE1 and a second automatic voltage regulator RE2, the set of mechanical latching auxiliary switches KB is controlled by a set of mechanical latching modules KB, the set of mechanical latching modules KB is divided into a first latching relay KB1 and a second latching relay KB2, and the set of mechanical latching auxiliary switches KB is divided into a first latching auxiliary switch KB11 and a second latching auxiliary switch KB 21.
3. The control loop of the generator excitation control system of claim 2, wherein: the control circuit of the first automatic voltage regulator RE1 comprises a first switching branch and a first switching control branch, wherein the first switching control branch comprises a first switching control relay K4 and a first automatic voltage regulator RE1 connected with the first switching control relay K4, the first switching branch comprises a first latching relay KB1, a first switching control first auxiliary switch K41 connected with the first latching relay KB1 in series, a first button N1 and a second switching control first auxiliary switch K51, and the first button N1 and the second switching control first auxiliary switch K51 are mutually connected in parallel and are respectively connected with the first switching control first auxiliary switch K41 in series.
4. The control loop of the generator excitation control system of claim 2, wherein: the second automatic voltage regulator RE2 control circuit comprises a second switching branch and a second switching control branch, the second switching control branch comprises a second switching control relay K5 and a second automatic voltage regulator RE2 connected with the second switching control relay K5, the second switching branch comprises a second latching relay KB2, a second switching control second auxiliary switch K52 connected with the second latching relay KB2 in series, a second button N2 and a first switching control second auxiliary switch K42, and the second button N2 and the first switching control second auxiliary switch K42 are mutually connected in parallel and are respectively connected with the second switching control second auxiliary switch K52 in series.
5. The control loop of the generator excitation control system of claim 1, characterized by: the protection circuit comprises a breaker state branch circuit, an overvoltage state branch circuit and an overvoltage protection branch circuit and an alarm circuit;
the breaker state branch comprises a breaker state relay K3 and a breaker closing auxiliary switch VCB which are connected in series;
the overvoltage state branch circuit comprises an overvoltage state relay K8 and an overvoltage protection auxiliary switch RP3 which are connected in series;
the overvoltage protection branch comprises a breaker opening relay QF1, a breaker state auxiliary switch K3 and an overvoltage state auxiliary switch K8 which are connected in series;
the alarm circuit comprises an alarm relay K10 and an automatic voltage regulator group which are connected in series.
6. The control loop of the generator excitation control system of claim 1, characterized by: the manual regulating circuit comprises a voltage boosting regulating branch circuit, a voltage reducing regulating branch circuit, an FCR mode switching circuit and an AVR mode switching circuit;
the boosting regulation branch comprises a boosting relay K11 and a boosting control switch XB1 which are connected in series;
the voltage reduction regulating branch comprises a voltage reduction relay K12 and a voltage reduction control switch XB2 which are connected in series;
the FCR mode switching circuit comprises an FCR mode relay K13 and an FCR mode control switch XB3 which are connected in series;
the AVR mode switching circuit comprises an AVR mode relay K14 and an AVR mode control switch XB4 which are connected in series.
7. The control loop of the generator excitation control system of claim 1, characterized by: the control loop of the generator excitation control system also comprises a starting circuit.
8. The control loop of the generator excitation control system of claim 7, wherein: the starting circuit consists of a starting control branch and a starting branch;
the starting control branch comprises a starting control switch XC1 and a starting control relay K15 which are connected in series;
the starting branch circuit comprises a contactor coil K1, an automatic voltage regulator group and a starting control auxiliary switch K15 which are connected in series.
9. The control loop of the generator excitation control system of claim 1, characterized by: the control loop of the generator excitation control system further comprises an indicating circuit, and the indicating circuit comprises a first indicating branch, a second indicating branch and an alarm indicating branch.
10. The control loop of the generator excitation control system of claim 1, characterized by: the control loop of the generator excitation control system further comprises a power supply circuit which is used for supplying power to the first automatic voltage regulator RE1 and the second automatic voltage regulator RE 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922471326.3U CN211296609U (en) | 2019-12-31 | 2019-12-31 | Control loop of generator excitation control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922471326.3U CN211296609U (en) | 2019-12-31 | 2019-12-31 | Control loop of generator excitation control system |
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| CN211296609U true CN211296609U (en) | 2020-08-18 |
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