CN105810059A - Conversion device used for simulating generator parallel - Google Patents
Conversion device used for simulating generator parallel Download PDFInfo
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- CN105810059A CN105810059A CN201410851868.2A CN201410851868A CN105810059A CN 105810059 A CN105810059 A CN 105810059A CN 201410851868 A CN201410851868 A CN 201410851868A CN 105810059 A CN105810059 A CN 105810059A
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Abstract
The invention belongs to the technical field of a nuclear power station simulator and particularly relates to a conversion device used for simulating generator parallel. The device comprises an MCU smallest system, a DDS circuit, a filtering and power amplification circuit, an on-off control circuit, a communication serial port and a dial switch, wherein the dial switch is used for manually setting a circuit communication address, the MCU smallest system receives a control command outputted by an external host computer through the communication serial port and controls the DDS chip for generating two paths of sine wave signals of which frequency and voltage can be adjusted, filtering, voltage and power amplification for the sine wave signals are carried out through the filtering and power amplification circuit, the processed sine wave signals are outputted to the on-off control circuit, the on-off control circuit closes or opens a relay contact according to a control command outputted by the MCU smallest system, and whether the sine wave signals are outputted to the same period equipment is controlled. According to the device, for the nuclear power station simulator, internal modification of the synchronizing equipment is not needed, the nuclear power station simulator can be directly connected with the synchronizing equipment, and damage caused by internal modification of the synchronizing equipment can be avoided.
Description
Technical field
The invention belongs to nuclear power plant analog machine technical field, be specifically related to the conversion equipment of a kind of simulation generator connecting in parallel with system being applied to nuclear power station training.
Background technology
Due to the needs of operation of power networks, generator connecting in parallel with system operates and is all carrying out almost every day, and net operation is divided into the grid-connected and manual quasi-simultaneous interconnecting of automatic presynchronization, and the former is by automatic sub-synchronous device control, and error rate is relatively low；The latter is manual operation, it is necessary to by the same period, the instruction of table selects grid-connected opportunity, if grid-connected timing is not right, grid-connected will be unable to is normally carried out, and the properly functioning of power system can be caused serious harm.Emulation training equipment is utilized to carry out generator connecting in parallel with system simulated operation, power plant operator are made to be familiar with grid-connected rule of operation, the skilled using method grasping the power station equipment same period, select the moment of grid-connected combined floodgate, reduce the probability of actual grid-connected middle maloperation, be that actual motion successfully carries out grid-connected key point.
What the automatic presynchronization used due to actual power station and the manual same period, equipment received is actual electric network and the voltage signal of actual generator output, the grid-connected simulator development of nuclear power plant analog machine cannot directly use, in order to use these of equipment in replicating machine same period, equipment must be transformed, in order to the digital signal that Simulated training main frame passes over can be received.
Summary of the invention
For above-mentioned prior art, the present invention provides a kind of conversion equipment grid-connected in order to simulate power station generator, on-the-spot actual grid-connection device need not be carried out internal transformation, can overall directly be connected with actual grid-connection device, thus the damage avoided actual grid-connection device carries out internal transformation and cause.
In order to solve above-mentioned technical problem, a kind of conversion equipment simulating generator connecting in parallel with system of the present invention includes MCU minimum system, DDS circuit, filtering and power amplification circuit, on-off control circuit, communication serial ports and toggle switch；MCU minimum system input is connected with outside host computer by communication serial ports, toggle switch is connected with MCU minimum system input, MCU minimum system outfan is connected with DDS circuit input, DDS circuit outfan is connected with filtering and power amplification circuit input, filtering and power amplification circuit outfan are connected with on-off control circuit input, on-off control circuit outfan connects the equipment same period, and on-off control circuit input is connected with MCU minimum system outfan.
Toggle switch is for manually arranging circuit address, MCU minimum system receives the control command of outside host computer output by communication serial ports, control DDS circuit and produce the sine wave signal of two-way adjustable frequency and voltage magnitude, sine wave signal is by filtering and after power amplification circuit is sequentially carried out filtering, voltage and power amplification, on-off control circuit is arrived in output, on-off control circuit is according to the control command of MCU minimum system output, close or open relay contact, control whether sine wave signal exports on the equipment same period.
Described MCU minimum system includes single-chip microcomputer, crystal oscillator, power supply；Power supply is that MCU minimum system is powered, and crystal oscillator produces the necessary clock frequency of single-chip microcomputer work, and single-chip microcomputer receives the control command of outside host computer output by communication serial ports, and control command is converted to control word；According to the control command of outside host computer output, break-make control part is sent control instruction, feedback signal is passed to host computer by communication serial ports simultaneously.
Described single-chip microcomputer is STM32 series monolithic.
Described DDS circuit includes DDS circuit A and DDS circuit B, and each DDS circuit includes DDS chip, reference voltage；DDS chip receives the control word of MCU minimum system output by synchronous serial bus, produces the sine wave signal of adjustable frequency, phase place and voltage magnitude, and reference voltage provides voltage reference value for DDS chip；DDS circuit A and DDS circuit B is respectively according to the control word received, the sine wave signal of output respective frequencies, phase place and voltage magnitude.
Described filtering and power amplification circuit include low pass filter, voltage amplifier, power amplifier, are sequentially connected in series；Filtering and power amplifying part receive the sine wave signal of DDS circuit A and DDS circuit B output, low pass filter filters the sine wave signal unusual fluctuations of DDS switching instant, and the sine wave signal of low pass filter output is carried out voltage and power amplification by voltage amplifier and power amplifier respectively.
The conversion equipment of described simulation generator connecting in parallel with system also includes transformator, and described transformator accepts filter and power amplification circuit outfan sine wave signal, is amplified further by sine wave signal voltage magnitude.
Described on-off control circuit includes relay and relay drive circuit；Number of relays is determined according to the input subnumber of the equipment same period, and the corresponding relay drive circuit of each relay connects；The sine wave signal of on-off control circuit receiving transformer output, according to the control signal of MCU minimum system output, closes or opens relay contact, control whether sine wave signal exports on the equipment same period；When the grid-connected failure successful, grid-connected of the equipment same period or break down in situation, the same period equipment output feedback signal, the feedback signal of output feeds back to MCU minimum system by on-off control circuit.
Described number of relays is 3.
The technical scheme that the embodiment of the present invention provides has the benefit that
The conversion equipment of generator connecting in parallel with system is simulated in power station based on DDS technology provided by the invention need not carry out internal transformation to on-the-spot actual grid-connection device, can overall directly be connected with actual grid-connection device, thus avoiding actual grid-connection device carrying out internal transformation and managing damage.By means of the present invention, can effectively shorten the construction cycle of the grid-connected analog portion of analog machine and improve the fidelity of system simulation, enable an operator to more true to nature and system the using method learning the equipment same period, be familiar with grid-connected rule of operation, reduce the probability of actual grid-connected middle maloperation.Meanwhile, actual grid-connection device need not be transformed by the nuclear power plant training simulator implementing the present invention, and the grid-connection device that analog machine uses can exchange with the actual grid-connection device of power plant, in emergency circumstances can as power plant's spare part.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of conversion equipment simulating generator connecting in parallel with system of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is elaborated.
As shown in Figure 1, the present invention utilizes the conversion equipment of DDS technical construction a kind of power station simulation generator connecting in parallel with system to include MCU minimum system, DDS circuit, filtering and power amplification circuit, on-off control circuit, communication serial ports and toggle switch etc., MCU minimum system input is connected with outside host computer by communication serial ports, toggle switch is connected with MCU minimum system input, MCU minimum system outfan is connected with DDS circuit input, DDS circuit outfan is connected with filtering and power amplification circuit input, filtering and power amplification circuit outfan are connected with on-off control circuit input, on-off control circuit outfan connects the equipment same period, on-off control circuit input is connected with MCU minimum system outfan.
Toggle switch is the address switch operating control, in order to manually to arrange circuit address.
MCU minimum system includes single-chip microcomputer, crystal oscillator, power supply；Power supply is that MCU minimum system is powered, and crystal oscillator produces the necessary clock frequency of single-chip microcomputer work, and single-chip microcomputer receives the control command of outside host computer output by communication serial ports, and control command is converted to control word；According to the control command of outside host computer output, on-off control circuit being sent control instruction, by communication interface, feedback signal is passed to host computer simultaneously, described single-chip microcomputer is STM32 series monolithic.
DDS circuit includes DDS circuit A and DDS circuit B, and each DDS circuit includes DDS chip, reference voltage；DDS chip receives the control word of MCU minimum system output by synchronous serial bus, produces the sine wave signal of adjustable frequency, phase place and voltage magnitude, and reference voltage provides voltage reference value for DDS chip；DDS circuit A and DDS circuit B is respectively according to the control word received, the sine wave signal of output respective frequencies, phase place and voltage magnitude.
Filtering and power amplification circuit include low pass filter, voltage amplifier, power amplifier, are sequentially connected in series；Filtering and power amplification circuit receive the sine wave signal of DDS circuit A and DDS circuit B output, low pass filter filters the sine wave signal unusual fluctuations of DDS switching instant, and the sine wave signal of low pass filter output is carried out voltage and power amplification by voltage amplifier and power amplifier respectively.
Transformator accepts filter and power amplification circuit outfan sine wave signal, sine voltage amplitude is amplified further.
On-off control circuit includes relay and relay drive circuit；Relay is determined according to the input subnumber of the equipment same period, and it is 3 that the present embodiment provides relay, and the corresponding relay drive circuit of each relay connects；The sine wave signal of on-off control circuit receiving transformer output, according to the control signal of MCU minimum system output, closes or opens relay contact, control whether sine wave signal exports on the equipment same period；Additionally, when the grid-connected failure successful, grid-connected of the equipment same period or breaking down, meeting output feedback signal, the feedback signal of output feeds back to MCU minimum system by on-off control circuit.
Claims (9)
1. the conversion equipment simulating generator connecting in parallel with system, it is characterised in that: this device includes MCU minimum system, DDS circuit, filtering and power amplification circuit, on-off control circuit, communication serial ports and toggle switch；MCU minimum system input is connected with outside host computer by communication serial ports, toggle switch is connected with MCU minimum system input, MCU minimum system outfan is connected with DDS circuit input, DDS circuit outfan is connected with filtering and power amplification circuit input, filtering and power amplification circuit outfan are connected with on-off control circuit input, on-off control circuit outfan connects the equipment same period, and on-off control circuit input is connected with MCU minimum system outfan.
2. the conversion equipment of simulation generator connecting in parallel with system according to claim 1, it is characterized in that: toggle switch is for manually arranging circuit address, MCU minimum system receives the control command of outside host computer output by communication serial ports, control DDS circuit and produce the sine wave signal of two-way adjustable frequency and voltage magnitude, sine wave signal is by filtering and power amplification circuit is sequentially carried out filtering, after voltage and power amplification, on-off control circuit is arrived in output, on-off control circuit is according to the control command of MCU minimum system output, close or open relay contact, control whether sine wave signal exports on the equipment same period.
3. the conversion equipment of simulation generator connecting in parallel with system according to claim 1 and 2, it is characterised in that: described MCU minimum system includes single-chip microcomputer, crystal oscillator, power supply；Power supply is that MCU minimum system is powered, and crystal oscillator produces the necessary clock frequency of single-chip microcomputer work, and single-chip microcomputer receives the control command of outside host computer output by communication serial ports, and control command is converted to control word；According to the control command of outside host computer output, break-make control part is sent control instruction, feedback signal is passed to host computer by communication serial ports simultaneously.
4. the conversion equipment of simulation generator connecting in parallel with system according to claim 3, it is characterised in that: described single-chip microcomputer is STM32 series monolithic.
5. the conversion equipment of simulation generator connecting in parallel with system according to claim 1 and 2, it is characterised in that: described DDS circuit includes DDS circuit A and DDS circuit B, and each DDS circuit includes DDS chip, reference voltage；DDS chip receives the control word of MCU minimum system output by synchronous serial bus, produces the sine wave signal of adjustable frequency, phase place and voltage magnitude, and reference voltage provides voltage reference value for DDS chip；DDS circuit A and DDS circuit B is respectively according to the control word received, the sine wave signal of output respective frequencies, phase place and voltage magnitude.
6. the conversion equipment of simulation generator connecting in parallel with system according to claim 1 and 2, it is characterised in that: described filtering and power amplification circuit include low pass filter, voltage amplifier, power amplifier, are sequentially connected in series；Filtering and power amplifying part receive the sine wave signal of DDS circuit A and DDS circuit B output, low pass filter filters the sine wave signal unusual fluctuations of DDS switching instant, and the sine wave signal of low pass filter output is carried out voltage and power amplification by voltage amplifier and power amplifier respectively.
7. the conversion equipment of simulation generator connecting in parallel with system according to claim 1 and 2, it is characterized in that: this device also includes transformator, described transformator accepts filter and power amplification circuit outfan sine wave signal, is amplified further by sine wave signal voltage magnitude.
8. the conversion equipment of simulation generator connecting in parallel with system according to claim 1 and 2, it is characterised in that: described on-off control circuit includes relay and relay drive circuit；Number of relays is determined according to the input subnumber of the equipment same period, and the corresponding relay drive circuit of each relay connects；The sine wave signal of on-off control circuit receiving transformer output, according to the control signal of MCU minimum system output, closes or opens relay contact, control whether sine wave signal exports on the equipment same period；When the grid-connected failure successful, grid-connected of the equipment same period or break down in situation, the same period equipment output feedback signal, the feedback signal of output feeds back to MCU minimum system by on-off control circuit.
9. the conversion equipment of simulation generator connecting in parallel with system according to claim 8, it is characterised in that: described number of relays is 3.
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| CN201410851868.2A CN105810059A (en) | 2014-12-30 | 2014-12-30 | Conversion device used for simulating generator parallel |
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| CN201410851868.2A CN105810059A (en) | 2014-12-30 | 2014-12-30 | Conversion device used for simulating generator parallel |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445388A (en) * | 2018-02-12 | 2018-08-24 | 四川海特亚美航空技术有限公司 | Threephase alternator simulation device based on DDS and method |
| CN108931753A (en) * | 2018-06-28 | 2018-12-04 | 国网青海省电力公司电力科学研究院 | A kind of automatic testing method |
| CN111327072A (en) * | 2020-02-26 | 2020-06-23 | 岭东核电有限公司 | Steam turbine control method and equipment for nuclear power unit |
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| CN108931753A (en) * | 2018-06-28 | 2018-12-04 | 国网青海省电力公司电力科学研究院 | A kind of automatic testing method |
| CN111327072A (en) * | 2020-02-26 | 2020-06-23 | 岭东核电有限公司 | Steam turbine control method and equipment for nuclear power unit |
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Application publication date: 20160727 |