CN111987950B - Excitation regulator and signal processing device of emergency diesel generator set of nuclear power station - Google Patents
Excitation regulator and signal processing device of emergency diesel generator set of nuclear power station Download PDFInfo
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- CN111987950B CN111987950B CN202010749695.9A CN202010749695A CN111987950B CN 111987950 B CN111987950 B CN 111987950B CN 202010749695 A CN202010749695 A CN 202010749695A CN 111987950 B CN111987950 B CN 111987950B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/38—Self-excitation by current derived from rectification of both output voltage and output current of generator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
Abstract
The utility model belongs to the technical field of generator and auxiliary system thereof, especially, relate to emergent diesel generating set's of nuclear power station excitation regulator and signal processing apparatus, AC conversion circuit is the first direct current signal with alternating voltage signal rectification, carries out amplitude limiting control with it by overvoltage protection circuit and then exports processing circuit to carry out amplitude matching processing, filtering processing, adjust according to first output gain again, output second direct current signal of telecommunication. And the reactive power setting circuit receives the third direct current signal and processes the third direct current signal according to the second output gain of the reactive power setting circuit to obtain a fourth direct current signal. According to the excitation regulator and the signal processing device, the second output gain is designed to be adjustable, so that the excitation regulator and upstream equipment have good matching performance, and equipment maintenance is facilitated; the overvoltage protection circuit carries out amplitude limiting processing on the first direct current signal, avoids the situation that the circuit is burnt due to abnormal input alternating current voltage signals, and is high in reliability and safety.
Description
Technical Field
The application belongs to the technical field of generators and auxiliary systems thereof, and particularly relates to an excitation regulator and a signal processing device of an emergency diesel generator set of a nuclear power station.
Background
The excitation system is an important control system of an Emergency Diesel Generator Set (EDG) of a nuclear power station, and the excitation system provides excitation current to a rotor of the Diesel Generator to control output voltage and reactive power of the Diesel Generator and ensure stable operation of the Emergency Diesel Generator. The excitation system mainly comprises an excitation power unit and a signal processing device, wherein the signal processing device outputs a trigger pulse signal after processing a received feedback signal provided by the diesel generator, and controls the conduction of a silicon controlled rectifier of the excitation power unit, so that a corresponding excitation current is provided for an excitation winding of the diesel generator. The excitation regulator is used as a key component of the signal processing device and is responsible for receiving an alternating voltage signal representing the stator voltage of the diesel generator, a signal representing the reactive output of the EDG unit and a given value signal, processing the signals and outputting a control signal, wherein the control signal is used for participating in the process of controlling and generating a trigger pulse signal, and therefore the excitation regulator is important for keeping the EDG unit to operate safely and stably.
However, the output gain of the traditional excitation regulator is fixed, and the matching performance with upstream equipment is poor, so that the maintenance of the equipment is not facilitated; in addition, when the amplitude of the input signal is abnormal, the excitation regulator is easily damaged, and the reliability is low.
Disclosure of Invention
The utility model provides an emergent diesel generating set's of nuclear power station excitation regulator and signal processing apparatus, the output gain that aims at solving traditional excitation regulator existence is fixed to lead to and the upstream equipment between the matching nature relatively poor, is unfavorable for equipment maintenance, leads to excitation regulator to be damaged easily when input signal amplitude is unusual, the problem of low reliability.
A first aspect of the embodiments of the present application provides an excitation regulator of an emergency diesel generator set of a nuclear power plant, for being connected with an excitation power unit, the emergency diesel generator set is composed of a plurality of diesel generators, the excitation regulator includes:
the alternating current conversion circuit is used for receiving an alternating current voltage signal representing the stator voltage of the diesel generator and rectifying the alternating current voltage signal to obtain a first direct current signal;
the overvoltage protection circuit is connected with the alternating current conversion circuit and is used for carrying out amplitude limiting control on the received first direct current signal and then outputting the first direct current signal;
the processing circuit is connected with the overvoltage protection circuit and used for carrying out amplitude matching processing and filtering processing on the first direct current signal after amplitude limiting control and adjusting according to first output gain to obtain a second direct current signal;
the reactive power setting circuit is used for receiving a third direct current signal representing reactive power output of the emergency diesel generator set (preferably, English does not appear), correspondingly adjusting self second output gain according to the received adjusting signal, and processing the third direct current signal according to the self second output gain to obtain a fourth direct current signal; and
and the amplification output circuit is connected with the processing circuit and the reactive setting circuit and is used for amplifying the received second direct current signal and the fourth direct current signal so as to output a control signal, and the control signal is used for indicating the excitation power unit to output excitation current to the diesel generator.
The excitation regulator has good matching performance with upstream equipment by designing the adjustable second output gain, and is beneficial to equipment maintenance; the overvoltage protection circuit carries out amplitude limiting processing on the first direct current signal, avoids the situation that the circuit is burnt due to abnormal input alternating current voltage signals, and is high in reliability and safety.
Optionally, the processing circuit includes:
the amplitude matching circuit is connected with the overvoltage protection circuit and is used for carrying out amplitude matching on the received first direct current signal and then outputting the signal;
the filter circuit is connected with the amplitude matching circuit and used for filtering and outputting the first direct current signal subjected to amplitude matching; and
and the gain setting circuit is connected with the filter circuit and the reactive power setting circuit and is used for adjusting the first output gain, adjusting the first direct current signal after filtering according to the first output gain and outputting the adjusted first direct current signal to the reactive power setting circuit.
According to the processing circuit, the first output gain is adjusted through the gain setting circuit, so that the excitation regulator and the upstream equipment have good matching performance, equipment maintenance is facilitated, flexibility is high, and the purpose that various upstream equipment can be matched without replacing internal devices of the processing circuit is achieved.
Optionally, the overvoltage protection circuit includes:
the first resistor, the second resistor, the first discharge diode, the second discharge diode, the third discharge diode and the fourth discharge diode;
the first end of the first resistor and the first end of the second resistor are both connected with the alternating current conversion circuit, a node where the cathode of the first discharge diode and the cathode of the second discharge diode are connected in common is connected with a positive power supply signal, the anode of the first discharge diode, the cathode of the third discharge diode and the second end of the second resistor are connected in common, the anode of the second discharge diode, the cathode of the fourth discharge diode and the second end of the first resistor are connected in common, and a node where the anode of the third discharge diode and the anode of the fourth discharge diode are connected in common is connected with a negative power supply signal.
According to the overvoltage protection circuit, amplitude limiting control is carried out on the accessed first direct current signal through the first discharge diode, the second discharge diode, the third discharge diode and the fourth discharge diode, the phenomenon that the rear end circuit is burnt down due to the fact that the amplitude of the alternating current voltage signal input from the front end is too high is avoided, and reliability and safety are improved.
Optionally, the gain setting circuit includes:
a first adjustable resistor, a ninth resistor, and a tenth resistor;
the first fixed end of the first adjustable resistor is connected with the filter circuit, the second fixed end of the first adjustable resistor, the first end of the ninth resistor and the first end of the tenth resistor are connected together, the second end of the ninth resistor is connected with the amplification output circuit, and the second end of the tenth resistor is connected with the output terminal.
The gain setting circuit realizes adjustment of the first output gain by changing the effective resistance value of the first adjustable resistor, is high in adjustment precision and wide in adjustment range, has good matching performance between the excitation regulator and upstream equipment, is beneficial to equipment maintenance, is high in flexibility, and can be matched with various upstream equipment without replacing internal devices of the processing circuit.
Optionally, the excitation regulator further includes:
and the control panel is connected with the processing circuit and the reactive power setting circuit and is used for correspondingly outputting the adjusting signal according to a control instruction input by a user so as to adjust the first output gain and the second output gain.
The control panel provides a man-machine interaction channel, a user can adjust the first output gain and the second output gain according to actual needs, operation of the user is facilitated, and practicability is high.
A second aspect of the embodiments of the present application provides a signal processing apparatus of a nuclear power station emergency diesel generator set, configured to be connected with an excitation power unit, where the signal processing apparatus includes the excitation regulator described above.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: according to the excitation regulator and the signal processing device, the second output gain is designed to be adjustable, so that the excitation regulator and upstream equipment have good matching performance, and equipment maintenance is facilitated; the overvoltage protection circuit carries out amplitude limiting processing on the first direct current signal, avoids the situation that the circuit is burnt due to abnormal input alternating current voltage signals, and is high in reliability and safety.
Drawings
Fig. 1 is a schematic structural diagram of an excitation regulator according to an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an excitation regulator according to another embodiment of the present application;
FIG. 3 is an exemplary circuit schematic of an overvoltage protection circuit in the field regulator of FIG. 1;
FIG. 4 is an exemplary circuit schematic of an amplitude matching circuit in the excitation regulator of FIG. 2;
FIG. 5 is an exemplary circuit schematic of a filter circuit in the excitation regulator of FIG. 2;
FIG. 6 is an exemplary circuit schematic of a gain setting circuit in the field regulator of FIG. 2;
FIG. 7 is an exemplary circuit schematic of a reactive setting circuit in the excitation regulator of FIG. 1;
FIG. 8 is an exemplary circuit schematic of an amplified output circuit in the field regulator of FIG. 1;
FIG. 9 is an exemplary circuit schematic of an AC converting circuit in the field regulator of FIG. 1;
FIG. 10 is an overall exemplary circuit schematic of the field regulator of FIG. 1;
FIG. 11 is a schematic structural diagram of an excitation regulator according to yet another embodiment of the present application;
FIG. 12 is an overall example circuit schematic of the field regulator of FIG. 11;
fig. 13 is a structural diagram of an excitation regulator provided by 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.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1, a schematic structural diagram of an excitation regulator according to an embodiment of the present application is shown, for convenience of description, only the parts related to the embodiment are shown, and the detailed description is as follows:
an excitation regulator of a nuclear power station emergency diesel generator set is used for being connected with an excitation power unit and comprises an alternating current conversion circuit 10, an overvoltage protection circuit 20, a processing circuit 30, a reactive power setting circuit 40 and an amplification output circuit 50.
The ac conversion circuit 10 is connected to the overvoltage protection circuit 20, the overvoltage protection circuit 20 is connected to the processing circuit 30, and the reactive power setting circuit 40 is connected to the processing circuit 30 and the reactive power setting circuit 40. The alternating current conversion circuit 10 and the reactive power setting circuit 40 are both connected with the input circuit 100, the input circuit 100 comprises a plurality of transmission terminals, and the plurality of transmission terminals are responsible for transmitting different signals, including an alternating current voltage signal representing the stator voltage of the diesel generator and a third direct current signal representing the reactive power output of the emergency diesel generator set.
The alternating current conversion circuit 10 is configured to receive an alternating current voltage signal representing a stator voltage of the diesel generator, and perform rectification processing to obtain a first direct current signal.
Specifically, the ac voltage signal has three components, which are a U-phase component, a V-phase component, and a W-phase component.
The overvoltage protection circuit 20 is configured to perform amplitude limiting control on the received first dc signal and output the first dc signal.
Specifically, when the amplitude of the first direct current signal is higher than the preset amplitude, the amplitude limiting control is performed through the overvoltage protection circuit 20, and the amplitude of the first direct current signal is limited in a state lower than or equal to the preset amplitude, so that the anti-interference capacity of the whole circuit is improved, the surge is prevented, the overvoltage is prevented, the reliability is high, and the safety is high.
The processing circuit 30 is configured to perform amplitude matching processing and filtering processing on the received first dc signal after amplitude limiting control, and then adjust the received first dc signal according to the first output gain to obtain a second dc signal and output the second dc signal.
And the reactive power setting circuit 40 is configured to receive a third direct-current signal representing the reactive power output of the EDG unit, correspondingly adjust the second output gain of the third direct-current signal according to the received adjustment signal, and process the third direct-current signal according to the second output gain of the third direct-current signal to obtain a fourth direct-current signal.
Specifically, the second output gain is designed to be adjustable, so that the excitation regulator and the upstream equipment have good matching performance, and equipment maintenance is facilitated.
The amplifying output circuit 50 is configured to output a control signal after amplifying the received second direct current electrical signal and the fourth direct current electrical signal, where the control signal is used to instruct the excitation power unit to output an excitation current to the diesel generator.
According to the excitation regulator and the signal processing device, the second output gain is designed to be adjustable, so that the excitation regulator and upstream equipment have good matching performance, and equipment maintenance is facilitated; the overvoltage protection circuit 20 performs amplitude limiting processing on the first direct current signal, so that the circuit is prevented from being burnt due to abnormal input alternating current voltage signals, and the reliability and safety are high.
Referring to fig. 2, a schematic structural diagram of an excitation regulator according to another embodiment of the present application is shown, and for convenience of description, only the portions related to this embodiment are shown, and detailed descriptions are as follows:
in an alternative embodiment, the processing circuit 30 includes an amplitude matching circuit 31, a filtering circuit 32, and a gain setting circuit 33.
The amplitude matching circuit 31 is connected to the overvoltage protection circuit 20, the filter circuit 32 is connected to the amplitude matching circuit 31, and the gain setting circuit 33 is connected to the filter circuit 32 and the reactive setting circuit 40.
The amplitude matching circuit 31 is configured to perform amplitude matching on the received first direct current signal and then output the first direct current signal.
The filter circuit 32 is configured to filter the first dc signal after amplitude matching and output the filtered first dc signal.
Specifically, the filter circuit 32 filters the interference signal, so that the high-frequency clutter interference circuit is prevented from working, and the overall stability and safety of the circuit are improved.
The gain setting circuit 33 is configured to adjust the first output gain, adjust the filtered first dc signal according to the first output gain, and output the adjusted first dc signal to the reactive power setting circuit 40.
Specifically, the gain setting circuit 33 adjusts the first output gain in accordance with the adjustment signal. The excitation regulator and the upstream equipment have good matching performance by adjusting the first output gain, and equipment maintenance is facilitated.
Referring to fig. 3, a schematic diagram of an example circuit of the overvoltage protection circuit 20 in the field regulator shown in fig. 1 is shown, and for convenience of description, only the parts related to the present embodiment are shown, and detailed as follows:
in an alternative embodiment, the overvoltage protection circuit 20 includes a first resistor R3, a second resistor R5, a first discharge diode D1, a second discharge diode D2, a third discharge diode D3, and a fourth discharge diode D4.
The first end of the first resistor R3 and the first end of the second resistor R5 are both connected to the ac conversion circuit 10, a common-connection node between the cathode of the first discharge diode D1 and the cathode of the second discharge diode D2 is connected to a positive power signal, the anode of the first discharge diode D1, the cathode of the third discharge diode D3, and the second end of the second resistor R5 are connected in common, the anode of the second discharge diode D2, the cathode of the fourth discharge diode D4, and the second end of the first resistor R3 are connected in common, and a common-connection node between the anode of the third discharge diode D3 and the anode of the fourth discharge diode D4 is connected to a negative power signal.
Specifically, the first discharge diode D1, the second discharge diode D2, the third discharge diode D3, and the fourth discharge diode D4 may be implemented by a voltage regulator or a transient suppression diode. When the amplitude of the first direct current signal is larger than the preset amplitude, the amplitude limiting network composed of the first discharge diode D1, the second discharge diode D2, the third discharge diode D3 and the fourth discharge diode D4 carries out amplitude limiting control, and limits the amplitude of the first direct current signal in a state lower than or equal to the preset amplitude, so that the anti-interference capacity of the whole circuit is improved, surging and overvoltage are prevented, the reliability is high, and the safety is high.
Referring to fig. 4, a schematic diagram of an exemplary circuit of the amplitude matching circuit 31 in the excitation regulator shown in fig. 2 is shown, and for convenience of illustration, only the parts related to the present embodiment are shown, and detailed as follows:
in an alternative embodiment, the amplitude matching circuit 31 includes a third resistor R4, a fourth resistor R6, a fifth resistor R7, a sixth resistor R8, a seventh resistor R9, a first capacitor C2, a second capacitor C4, and a first operational amplifier a 1.
The first end of the third resistor R4 and the first end of the fourth resistor R6 are both connected to the overvoltage protection circuit 20, the second end of the third resistor R4, the first end of the fifth resistor R7 and the inverting input terminal of the first operational amplifier a1 are connected in common, and the second end of the fourth resistor R6, the first end of the sixth resistor R8 and the non-inverting input terminal of the first operational amplifier a1 are connected in common; the second end of the fifth resistor R7, the first end of the seventh resistor R9 and the output end of the first operational amplifier A1 are connected in common, and the second end of the seventh resistor R9 is connected with the filter circuit 32; a node of a first end of the first capacitor C2, which is commonly connected with the positive power supply end of the first operational amplifier A1, is connected with a positive power supply signal, and a node of a first end of the second capacitor C4, which is commonly connected with the negative power supply end of the first operational amplifier A1, is connected with a negative power supply signal; the second terminal of the first capacitor C2, the second terminal of the second capacitor C4, and the second terminal of the sixth resistor R8 are grounded.
Specifically, a first end of the third resistor R4 is connected to a second end of the first resistor R3, and a first end of the fourth resistor R6 is connected to a second end of the second resistor R5. The positive power supply signal is a +15V direct current signal, and the negative power supply signal is a-15V direct current signal. The first capacitor C2 and the second capacitor C4 are both filter capacitors, which respectively filter out noise in the positive power signal and the negative power signal, so that the first operational amplifier a1 can stably operate.
Referring to fig. 5, an exemplary circuit schematic diagram of the filter circuit 32 in the field regulator shown in fig. 2 is shown, and for convenience of description, only the parts related to the present embodiment are shown, and detailed as follows:
in an alternative embodiment, the filter circuit 32 includes an eighth resistor R10, a third capacitor C1, a fourth capacitor C3, and a second operational amplifier a 2.
The node at which the first end of the eighth resistor R10 and the first end of the third capacitor C1 are connected to the amplitude matching circuit 31, the second end of the eighth resistor R10, the first end of the fourth capacitor C3 and the non-inverting input terminal of the second operational amplifier a2 are connected to each other, the second end of the third capacitor C1, the inverting input terminal of the second operational amplifier a2 and the output terminal of the second operational amplifier a2 are connected to each other, the second end of the fourth capacitor C3 is connected to ground, and the output terminal of the second operational amplifier a2 is connected to the gain setting circuit 33.
Specifically, a node at which the first end of the eighth resistor R10 and the first end of the third capacitor C1 are connected is connected to the second end of the seventh resistor R9. The fourth capacitor C3 is used as a filter capacitor for filtering out high-frequency interference noise generated by the first direct-current voltage signal, so as to prevent the back-end circuit from being interfered and being incapable of working normally or even damaged.
Referring to fig. 6, a schematic diagram of an example circuit of the gain setting circuit 33 in the excitation regulator shown in fig. 2 is shown, and for convenience of description, only the parts related to the present embodiment are shown, and detailed below:
in an alternative embodiment, the gain setting circuit 33 includes a first adjustable resistor RP3, a ninth resistor R12, and a tenth resistor RT 4R.
The first fixed end of the first adjustable resistor RP3 is connected with the filter circuit 32, the second fixed end of the first adjustable resistor, the first end of the ninth resistor R12 and the first end of the tenth resistor RT4R are connected in common, the second end of the ninth resistor R12 is connected with the amplification output circuit 50, and the second end of the tenth resistor RT4R is connected with the output terminal PT 4R.
Specifically, the first output gain is adjusted by adjusting the effective resistance value of the first adjustable resistor RP3, the adjustment precision is high, the adjustment range is wide, the excitation regulator and the upstream equipment have good matching performance, the equipment maintenance is facilitated, the flexibility is high, and the multiple upstream equipment can be matched without replacing internal devices of the processing circuit 30.
The first adjustable resistor RP3 may be implemented by any one of a slide rheostat, a resistor box, or a potentiometer, and may be implemented by a circuit that can perform the same function as the first adjustable resistor RP 3.
Referring to fig. 7, a schematic diagram of an example circuit of the reactive power setting circuit 40 in the excitation regulator shown in fig. 1 is shown, and for convenience of description, only the parts related to the present embodiment are shown, and detailed descriptions are as follows:
in an alternative embodiment, the reactive power setting circuit 40 includes a second adjustable resistor RP2, an eleventh resistor R28, and a twelfth resistor R29.
A first end of the eleventh resistor R28 receives a third direct current signal representing the reactive output of the EDG unit, a second end of the eleventh resistor R28, a first end of the twelfth resistor R29 and a first fixed end of the second adjustable resistor RP2 are connected in common, a common-connected node of a second end of the twelfth resistor R29 and a movable end of the second adjustable resistor RP2 is connected to the amplification output circuit 50, and a second fixed end of the second adjustable resistor RP2 is grounded.
Specifically, the second output gain is adjusted by adjusting the effective resistance value of the second adjustable resistor RP2, so that the adjustment precision is high, the adjustment range is wide, the excitation regulator and the upstream equipment have good matching performance, the equipment maintenance is facilitated, the flexibility is high, and the multiple upstream equipment can be matched without replacing internal devices of the processing circuit 30.
The second adjustable resistor RP2 may be implemented by any one of a slide rheostat, a resistor box, or a potentiometer, and may be implemented by a circuit that can perform the same function as the second adjustable resistor RP 2.
In an alternative embodiment, the excitation regulator further includes a control panel, and the control panel is connected to the processing circuit 30 and the reactive power setting circuit 40.
The control panel is used for correspondingly outputting an adjusting signal according to a control instruction input by a user so as to adjust the first output gain and the second output gain.
Specifically, the control panel controls the resistance values of the first adjustable resistor RP3 and the second adjustable resistor RP2 according to the control instruction input by the user.
Fig. 8 is a schematic circuit diagram of an example of the amplifying output circuit 50 of the excitation regulator shown in fig. 1, which only shows the relevant parts of the present embodiment for convenience of description, and the details are as follows:
a node at which the cathode of the diode D5, the anode of the diode D6, the first end of the resistor R17, and the inverting input terminal of the operational amplifier A3 are commonly connected to the processing circuit 30 and the reactive power setting circuit 40, and more specifically, to the second end of the ninth resistor R12 in the processing circuit 30 and the second end of the twelfth resistor R29 in the reactive power setting circuit 40. The first end of the resistor R18 is connected to the non-inverting input terminal of the operational amplifier A3, and the second end of the resistor R17, the first end of the resistor R19 and the active end of the adjustable resistor RP1 are connected in common.
The second end of the resistor R19, the output end of the operational amplifier A3, the first fixed end of the adjustable resistor RP1 and the first end of the resistor R21 are connected in common, and the second fixed end of the adjustable resistor RP1 and the first end of the resistor R20 are connected in common; the second terminal of the resistor R21 is commonly connected to the first terminal of the resistor R22, the second terminal of the resistor R22, the first terminal of the resistor R23, the first terminal of the capacitor C8, and the inverting input terminal of the operational amplifier a4 are commonly connected, the non-inverting input terminal of the operational amplifier a4 is commonly connected to the first terminal of the resistor R25, and the second terminal of the capacitor C8 is commonly connected to the first terminal of the resistor R24.
The second end of the resistor R24, the second end of the resistor R23, the first end of the resistor R26 and the output end of the operational amplifier A4 are connected in common, the second end of the resistor R26, the first end of the capacitor C11 and the non-inverting input end of the operational amplifier A5 are connected in common, the anode of the diode D7 and the output end of the operational amplifier A5 are connected in common, and the inverting input end of the operational amplifier A5, the first end of the resistor R27 and the cathode of the diode D7 are connected in common.
An anode of the diode D5, a cathode of the diode D6, a second terminal of the resistor R18, a second terminal of the resistor R20, a second terminal of the resistor R25, a second terminal of the capacitor C11, and a second terminal of the resistor R27 are grounded.
Referring to fig. 9, a schematic diagram of an example circuit of the ac conversion circuit 10 in the excitation regulator shown in fig. 1 is shown, and for convenience of description, only the parts related to the present embodiment are shown, and detailed descriptions are as follows:
in an alternative embodiment, the ac conversion circuit 10 includes a rectifier RD, a thirteenth resistor R1 and a fourteenth resistor R2.
The first input end, the second input end and the third input end of the rectifier RD are respectively used for accessing a U-phase component, a V-phase component and a W-phase component of an alternating voltage signal, a node at which the positive output end of the rectifier RD and the first end of the thirteenth resistor R1 are connected in common is connected with the overvoltage protection circuit 20, and a node at which the negative output end of the rectifier RD and the first end of the fourteenth resistor R2 are connected in common is connected with the overvoltage protection circuit 20; a second terminal of the thirteenth resistor R1 is coupled to a second terminal of the fourteenth resistor R2.
Referring to fig. 10, a schematic diagram of an overall example circuit of the excitation regulator shown in fig. 1 is shown, and for convenience of illustration, only the parts related to the present embodiment are shown, and detailed below:
the excitation regulator provided by the embodiment is applied to an excitation system of an emergency diesel generator set of a nuclear power station, adopts an integrated design, mainly comprises resistance-capacitance components and other general electronic components, and has the characteristics of good matching performance, facility maintenance convenience, and high reliability and safety.
Referring to fig. 11, a schematic structural diagram of an excitation regulator according to another embodiment of the present application is shown, and for convenience of description, only the parts related to this embodiment are shown, and detailed descriptions are as follows:
in an alternative embodiment, the excitation regulator described above further includes a given circuit 60. The setting circuit 60 is connected to the amplification output circuit 50 and also to the input circuit 100.
Specifically, the setting circuit 60 receives the set value signal transmitted by the input circuit 100, processes the set value signal, and outputs the processed set value signal to the amplifying output circuit 50.
Referring to fig. 12, a schematic diagram of an overall example circuit of the field regulator shown in fig. 11 is shown, and for convenience of description, only the parts related to the present embodiment are shown, and detailed as follows:
in an alternative embodiment, the given circuit 60 includes a resistor R11 and a resistor R16, a first end of the resistor R11 is used as an input end of the given circuit 60 for receiving a given value signal, a second end of the resistor R11 is connected to a first end of the resistor R16, and a second end of the resistor R16 is connected to the amplified output circuit 50.
As shown in FIG. 11, the excitation regulator has a plurality of test terminals (PT4R, PT5J, PT5B, PTI-1, PTI-2, PTD-1, PTD-2) to facilitate testing and sampling of electrical signals at corresponding nodes in the circuit, and to facilitate equipment maintenance and repair.
Referring to fig. 13, a structure diagram of the excitation regulator provided by the present application is shown, in which the excitation regulator adopts an integrated design, performs an optimized design on a device layout, and is mainly composed of general electronic components such as an integrated circuit and a resistor-capacitor component, and has the advantages of good matching performance, good maintainability, high reliability, and the like.
A second aspect of the present application provides a signal processing device for connection with an excitation power unit, the signal processing device comprising the excitation regulator described above.
In summary, the application provides an excitation regulator and a signal processing device of an emergency diesel generator set of a nuclear power station, and the excitation regulator and upstream equipment have good matching performance by designing the first output gain and the second output gain to be adjustable, so that equipment maintenance is facilitated; the overvoltage protection circuit carries out amplitude limiting processing on the first direct current signal, avoids the situation that the circuit is burnt due to abnormal input alternating current voltage signals, and is high in reliability and safety.
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 (9)
1. An excitation regulator of an emergency diesel generator set of a nuclear power station, which is used for being connected with an excitation power unit, wherein the emergency diesel generator set is composed of a plurality of diesel generators, and the excitation regulator comprises:
the alternating current conversion circuit is used for receiving an alternating current voltage signal representing the stator voltage of the diesel generator and rectifying the alternating current voltage signal to obtain a first direct current signal;
the overvoltage protection circuit is connected with the alternating current conversion circuit and is used for carrying out amplitude limiting control on the received first direct current signal and then outputting the first direct current signal;
the processing circuit is connected with the overvoltage protection circuit and used for carrying out amplitude matching processing and filtering processing on the first direct current signal after amplitude limiting control and adjusting according to first output gain to obtain a second direct current signal;
the reactive power setting circuit is used for receiving a third direct current signal representing the reactive power output of the emergency diesel generator set, correspondingly adjusting the second output gain of the reactive power setting circuit according to the received adjusting signal, and processing the third direct current signal according to the second output gain of the reactive power setting circuit to obtain a fourth direct current signal; and
the amplifying output circuit is connected with the processing circuit and the reactive setting circuit and is used for amplifying the received second direct current signal and the fourth direct current signal so as to output a control signal, and the control signal is used for indicating the excitation power unit to output excitation current to the diesel generator;
the processing circuit includes:
the amplitude matching circuit is connected with the overvoltage protection circuit and is used for carrying out amplitude matching on the first direct current signal after amplitude limiting control and then outputting the first direct current signal;
the filter circuit is connected with the amplitude matching circuit and used for filtering the first direct current signal subjected to amplitude matching and outputting the first direct current signal; and
and the gain setting circuit is connected with the filter circuit and the reactive power setting circuit and is used for adjusting the first output gain, adjusting the first direct current signal subjected to filtering according to the first output gain and outputting the adjusted first direct current signal to the reactive power setting circuit and the amplification output circuit.
2. The field regulator of claim 1, wherein said overvoltage protection circuit comprises:
the first resistor, the second resistor, the first discharge diode, the second discharge diode, the third discharge diode and the fourth discharge diode;
the first end of the first resistor and the first end of the second resistor are both connected with the alternating current conversion circuit, a node where the cathode of the first discharge diode and the cathode of the second discharge diode are connected in common is connected with a positive power supply signal, the anode of the first discharge diode, the cathode of the third discharge diode and the second end of the second resistor are connected in common, the anode of the second discharge diode, the cathode of the fourth discharge diode and the second end of the first resistor are connected in common, and a node where the anode of the third discharge diode and the anode of the fourth discharge diode are connected in common is connected with a negative power supply signal.
3. The field regulator of claim 1, wherein said amplitude matching circuit comprises:
the circuit comprises a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first capacitor, a second capacitor and a first operational amplifier;
the first end of the third resistor and the first end of the fourth resistor are both connected with the overvoltage protection circuit, the second end of the third resistor, the first end of the fifth resistor and the inverting input end of the first operational amplifier are connected in common, and the second end of the fourth resistor, the first end of the sixth resistor and the inverting input end of the first operational amplifier are connected in common; a second end of the fifth resistor, a first end of the seventh resistor and an output end of the first operational amplifier are connected in common, and a second end of the seventh resistor is connected with the filter circuit; a node of the first end of the first capacitor, which is commonly connected with the positive power supply end of the first operational amplifier, is accessed to a positive power supply signal, and a node of the first end of the second capacitor, which is commonly connected with the negative power supply end of the first operational amplifier, is accessed to a negative power supply signal; the second end of the first capacitor, the second end of the second capacitor and the second end of the sixth resistor are grounded.
4. The field regulator of claim 1, wherein said filter circuit comprises:
an eighth resistor, a third capacitor, a fourth capacitor and a second operational amplifier;
a node at which the first end of the eighth resistor and the first end of the third capacitor are connected in common is connected to the amplitude matching circuit, the second end of the eighth resistor, the first end of the fourth capacitor and the positive input end of the second operational amplifier are connected in common, the second end of the third capacitor, the inverting input end of the second operational amplifier and the output end of the second operational amplifier are connected in common, the second end of the fourth capacitor is connected to the ground, and the output end of the second operational amplifier is connected to the gain setting circuit.
5. The field regulator of claim 1, wherein said gain setting circuit comprises:
a first adjustable resistor, a ninth resistor, and a tenth resistor;
the first fixed end of the first adjustable resistor is connected with the filter circuit, the second fixed end of the first adjustable resistor, the first end of the ninth resistor and the first end of the tenth resistor are connected in common, the second end of the ninth resistor is connected with the amplification output circuit, and the second end of the tenth resistor is connected with the output terminal.
6. The excitation regulator of claim 1, wherein said reactive power setting circuit comprises:
a second adjustable resistor, an eleventh resistor and a twelfth resistor;
the first end of the eleventh resistor receives the third direct current signal representing the reactive output of the emergency diesel generator set, the second end of the eleventh resistor, the first end of the twelfth resistor and the first fixed end of the second adjustable resistor are connected in common, a node where the second end of the twelfth resistor and one movable end of the second adjustable resistor are connected in common is connected with the amplification output circuit, and the second fixed end of the second adjustable resistor is grounded.
7. The field regulator of claim 1, further comprising:
and the control panel is connected with the processing circuit and the reactive power setting circuit and is used for correspondingly outputting the adjusting signal according to a control instruction input by a user so as to adjust the first output gain and the second output gain.
8. The field regulator of claim 1, wherein said ac conversion circuit comprises:
a rectifier, a thirteenth resistor and a fourteenth resistor;
a first input end, a second input end and a third input end of the rectifier are respectively used for accessing a U-phase component, a V-phase component and a W-phase component of the alternating voltage signal, a node where a positive output end of the rectifier and a first end of the thirteenth resistor are connected in common is connected with the overvoltage protection circuit, and a node where a negative output end of the rectifier and a first end of the fourteenth resistor are connected in common is connected with the overvoltage protection circuit; a second terminal of the thirteenth resistor is connected to a second terminal of the fourteenth resistor.
9. A signal processing device of an emergency diesel generator set of a nuclear power plant for connecting with an excitation power unit, characterized in that the signal processing device comprises an excitation regulator according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010749695.9A CN111987950B (en) | 2020-07-30 | 2020-07-30 | Excitation regulator and signal processing device of emergency diesel generator set of nuclear power station |
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| CN202010749695.9A CN111987950B (en) | 2020-07-30 | 2020-07-30 | Excitation regulator and signal processing device of emergency diesel generator set of nuclear power station |
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| CN111987950B true CN111987950B (en) | 2022-06-07 |
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| CN111987950A (en) | 2020-11-24 |
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