CN110262285B

CN110262285B - Universal nuclear turbine control system simulator

Info

Publication number: CN110262285B
Application number: CN201910550923.7A
Authority: CN
Inventors: 崔栋良; 郑健; 史大伟; 孙智超; 陈亮
Original assignee: Harbin Turbine Co Ltd
Current assignee: Harbin Turbine Co Ltd; Hadian Power Equipment National Engineering Research Center Co Ltd
Priority date: 2019-06-24
Filing date: 2019-06-24
Publication date: 2022-06-21
Anticipated expiration: 2039-06-24
Also published as: CN110262285A

Abstract

A universal nuclear turbine control system simulator belongs to the technical field of nuclear turbine simulation. The invention aims at the problems that the existing turbine control system simulator has no universality and has no universality with signal interfaces using different brands of turbine control system servo cards. The test program module in the control unit is used for testing the analog quantity signal and the switching value signal in the simulation unit; the simulation program module is used for performing simulation setting on the simulation unit and controlling the simulation unit to operate according to the state signal of the steam turbine and the requirement of a preset simulation mode; the communication program module is used for realizing the transmission of communication signals between the control unit and the simulation unit; the simulation unit is used for acquiring state signals of the steam turbine control system, processing the acquired state signals according to instructions of the control unit and simulating to complete a preset simulation mode of the steam turbine control system. The method is used for simulation operation of the steam turbine control system.

Description

Universal nuclear turbine control system simulator

Technical Field

The invention relates to a universal nuclear turbine control system simulator, and belongs to the technical field of nuclear turbine simulation.

Background

A nuclear turbine control system simulator is a special test device for testing a turbine control system and verifying a control algorithm in a shutdown state. The simulator can receive electric signals from a high-pressure main valve (MSV), a high-pressure regulating valve (GV), a reheating regulating valve (ICV) servo card or the stroke (or opening degree) of an oil-operated machine of a nuclear turbine control system, simulate the regulation stage pressure, the low-pressure cylinder steam inlet pressure, the unit power, the rotating speed and the like during the speed raising, single-machine operation and grid-connected operation based on the through-flow part of the nuclear turbine and the dynamic characteristics of a rotor, input the signals into the nuclear turbine control system in a simulated electric signal mode, enable the nuclear turbine control system and the nuclear turbine control system simulator to form a closed loop, simulate the actual operation environment for the nuclear turbine control system in real time, detect the control function of the nuclear turbine control system, evaluate the control quality, seek the optimization setting of control parameters and develop a new control algorithm, and generate a simulated trip signal, and (4) carrying out load shedding and turbine protection system trip emergency condition examination tests on the turbine control system.

However, due to the particularity of the structure and system design of the nuclear turbine, the simulation function and the simulation mode of the existing conventional turbine control system simulator are single; meanwhile, the method has no universality of simulation for the steam turbines of various types, and also has no universality with signal interfaces using servo cards of steam turbine control systems of different brands.

Therefore, the simulation machine of the nuclear turbine control system becomes a key technical bottleneck for restricting the design and research of the nuclear turbine control system, and particularly, the development of a universal simulation machine which is suitable for various nuclear turbine types and is suitable for signal interfaces with servo cards of turbine control systems of various brands has great significance.

Disclosure of Invention

The invention provides a universal nuclear turbine control system simulator, which aims to solve the problems that the existing turbine control system simulator has no universality and the signal interface using different brands of turbine control system servo cards also has no universality.

The invention discloses a universal nuclear turbine control system simulator, which comprises a control unit and a simulation unit, wherein the control unit is connected with the simulation unit;

the control unit is used as a carrier of an application program module of the simulator and comprises a test program module, a simulation program module and a communication program module;

the test program module is used for testing the analog quantity signal and the switching value signal in the simulation unit;

the simulation program module is used for performing simulation setting on the simulation unit and controlling the simulation unit to operate according to the state signal of the steam turbine and the requirement of a preset simulation mode;

the communication program module is used for realizing the transmission of communication signals between the control unit and the simulation unit;

the simulation unit is used as a physical carrier controlled by the control unit and used for acquiring state signals of the steam turbine control system, processing the acquired state signals according to instructions of the control unit and simulating to complete a preset simulation mode of the steam turbine control system; the preset simulation mode comprises a self-checking mode, a semi-simulation mode and a full-simulation mode.

The simulation unit comprises a cabinet, a guide rail, a cabinet installation back plate, a fan, a sliding wheel, a hanging ring, a controller, an MSV servomotor servo interface module, a GV servomotor servo interface module, an ICV servomotor servo interface module, a rotating speed pulse signal output interface module, an analog quantity signal output interface module, a switching quantity signal output interface module, an analog quantity signal isolation safety grid, a 220VAC power supply module, a 220VAC power supply air switch, a 24VDC power supply air switch, a 220VAC power supply socket, a wiring terminal, a wire casing, an in-cabinet wiring, an aviation connector socket installation box, an aviation connector socket, an aviation connector plug with a prefabricated cable and a communication cable,

a guide rail and a cabinet installation back plate are arranged in the cabinet, and the guide rail is provided with a fixed analog quantity signal isolation safety barrier, a 220VAC power supply module, a 220VAC power supply air switch, a 24VDC power supply air switch, a 220VAC power socket and a wiring terminal; a fixed controller, an MSV servomotor servo interface module, a GV servomotor servo interface module, an ICV servomotor servo interface module, a rotating speed pulse signal output interface module, an analog quantity signal output interface module and a switching quantity signal output interface module are arranged on the cabinet mounting back plate; fans are respectively arranged on the front cabinet door and the rear cabinet door of the cabinet;

four corners of the bottom of the cabinet are respectively provided with a sliding wheel, and four corners of the top of the cabinet are respectively provided with a hanging ring; a wire slot is arranged in the cabinet, and an in-cabinet wiring is arranged in the wire slot; the bottom installation aviation connector socket install bin in the rack, concentrate on the aviation connector socket install bin and install a plurality of aviation connector sockets, aviation connector socket and the aviation connector plug and the supporting use of communication cable of taking the prefabricated cable.

According to the universal nuclear turbine control system simulator, the controller is used for processing signals of the simulator and performing real-time operation on a turbine flow-through part, a rotor dynamic characteristic mathematical model and a simulation program according to signals transmitted by the MSV servomotor servo interface module, the GV servomotor servo interface module, the ICV servomotor servo interface module, the rotating speed pulse signal output interface module, the analog quantity signal output interface module and the switching quantity signal output interface module under the instruction of the control unit.

According to the universal nuclear power turbine control system simulator, for a full simulation mode, the MSV servomotor servo interface module, the GV servomotor servo interface module and the ICV servomotor servo interface module sequentially receive a main steam valve driving instruction signal, a main steam regulating valve driving instruction signal and a reheat regulating valve driving instruction signal which are sent by a turbine control system servo card, simulate mathematical models of a servomotor, a servo valve and an LVDT through each interface module per se and process the mathematical models, and then feed back the main steam valve position signal, the main steam regulating valve position signal and the reheat regulating valve position signal to the turbine control system servo card.

According to the universal type nuclear power turbine control system simulator, the rotating speed pulse signal output interface module receives a 4-20 mA rotating speed analog quantity current simulation signal generated by the operation of a controller, converts the rotating speed analog quantity current simulation signal into a 3-path 5VDC or 12VDC or 24VDC adjustable pulse signal and outputs the signal to a turbine control system rotating speed card;

the analog quantity signal output interface module receives 4-20 mA analog quantity current simulation signals of regulating stage pressure, low-pressure cylinder steam inlet pressure, unit power and generator current generated by operation of a controller, and expands each path of 4-20 mA analog quantity current simulation signals into 3 paths of redundant 4-20 mA analog quantity current signals respectively to be output to a steam turbine control system;

the switching value signal output interface module receives switching value simulation signals of generator circuit breaker on-off, 500KV circuit breaker on-off, main transformer isolator on-off, safe oil pressure low shutdown, fast load reduction and load pause load increase generated by the operation of the controller, and respectively expands the switching value simulation signals into 3 paths of redundant switching value signals to be output to a steam turbine control system.

According to the universal nuclear steam turbine control system simulator, the 220VAC power supply air switch is used for receiving an external 220VAC power supply and controlling the on-off of a 220VAC power supply module, a 220VAC power supply socket and a fan power supply in a cabinet;

the 220VAC power supply module is used for converting a 220VAC power supply of the 220VAC power supply air switch into a 24VDC power supply and outputting the 24VDC power supply air switch to be used as a working power supply of the controller;

the 220VAC power socket is used for receiving 220VAC power of the 220VAC power air switch and providing 220VAC working power for the control unit.

According to the universal nuclear turbine control system simulator, the test program module comprises a function selection area and a test function display area and is used for realizing analog input test, analog output test, switching value input test and switching value output test:

the analog quantity input test comprises the steps of inputting a standard value of a preset analog quantity input for a preset analog input channel, comparing the standard value with an actual value of the preset analog quantity input, and correcting through an analog input correction coefficient until the standard value of the preset analog quantity input is equal to the actual value;

the analog quantity output test comprises the steps of inputting a standard value output by a preset analog quantity into a preset analog output channel, comparing the standard value with an actual value output by the preset analog quantity, and correcting through an analog output correction coefficient until the standard value output by the preset analog quantity is equal to the actual value;

the switching value input test comprises the steps of connecting a preset switching value input contact, judging the effectiveness of preset switching value input and displaying the state of the preset switching value input;

and the switching value output test comprises monitoring the switching state of a preset switching value output channel and judging the effectiveness.

According to the universal nuclear turbine control system simulator, the simulation program module receives the high-pressure main valve MSV, the high-pressure adjusting valve GV and the opening instruction of the reheating adjusting valve ICV of the turbine control system or the electric signal of the oil-actuated machine stroke, performs thermal modeling on a turbine set according to a turbine transfer function mathematical model, and transmits the obtained model and simulation parameters to a controller; and then regulating stage pressure, low-pressure cylinder steam inlet pressure, unit power and rotating speed of the steam turbine during single-machine operation and grid-connected operation of the steam turbine are simulated based on the through-flow part of the steam turbine and the dynamic characteristics of the rotor transmitted by the controller are transmitted to a steam turbine control system to form a closed loop, and simulation is completed through a semi-simulation mode or a full-simulation working mode.

According to the universal nuclear turbine control system simulator, the simulation program module comprises the functions of parameter setting, simulation operation and data management,

the parameter setting is to set and store preset parameters in a file form, and comprises channel setting, servo valve parameter setting, steam valve parameter setting, dynamic parameter setting of a steam turbine, simulation parameter setting and display parameter setting;

the simulation operation comprises entering a simulation interface based on the completed parameter setting, and controlling the simulation process based on the simulation interface; the simulation interface comprises a state display area, a curve display area, a parameter display area and a simulation operation area;

the data management comprises real-time storage of simulation data, and the density of the simulation data is that a group of data is stored every second; the run functions of data management include calling the stored emulation data, deleting obsolete files, and exiting data management.

According to the universal nuclear turbine control system simulator, the control unit comprises a notebook computer, and the notebook computer is arranged on a folding computer desk in a cabinet.

The invention has the beneficial effects that: the simulation machine is designed according to the structural characteristics of the nuclear turbine, simulation parameters can be modified through simulation program modules in the control unit according to the nuclear turbine structures of different types, so that simulation mathematical models of different nuclear turbines are established, parametric design of the simulation mathematical models of different nuclear turbines is realized, the simulation machine is suitable for the nuclear turbines with different cylinder body structures and different valve numbers, and the simulation machine has universality.

According to the invention, through the cooperation of the control unit and the simulation unit, three simulation modes can be realized: the self-checking mode, the full simulation mode and the semi-simulation mode can be applied to each stage of delivery acceptance of a steam turbine control system, debugging of a power plant, shutdown maintenance and the like.

The simulation unit can be arranged to perform signal interface with different brands of steam turbine control system servo cards, and the universality of the interface is realized.

The invention has the characteristics of convenient operation, simple wiring, accurate simulation and strong universality.

Drawings

FIG. 1 is a block diagram of the overall structure of a universal simulation machine for a control system of a nuclear steam turbine according to the present invention;

FIG. 2 is a rear view of the simulation unit cabinet;

FIG. 3 is a left side view of the simulation unit cabinet;

FIG. 4 is a front view of a simulation unit cabinet;

FIG. 5 is a schematic diagram of a circuit structure of a universal simulation machine for a control system of a nuclear steam turbine according to the present invention;

FIG. 6 is a schematic diagram of a turbine transfer function of a universal nuclear steam turbine control system simulator in accordance with the present invention;

FIG. 7 is a diagram of a test screen of the test program module;

FIG. 8 is a schematic diagram of a simulation screen of the simulation program module;

FIG. 9 is a diagram showing a setting screen for parameter setting in the simulation program module;

FIG. 10 is a diagram showing an operation screen of the simulation operation in the simulation program module;

FIG. 11 is a diagram illustrating the data management of the simulation program module;

FIG. 12 is a simulation overall flow chart of the simulation machine of the universal nuclear turbine control system according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

In a first specific embodiment, as shown in fig. 1, the invention provides a universal nuclear turbine control system simulator, which includes a control unit 100 and a simulation unit 200;

the control unit 100 is used as a carrier of an application program module of the simulator and comprises a test program module, a simulation program module and a communication program module;

the simulation unit 200 is used as a physical carrier controlled by the control unit and used for acquiring state signals of the steam turbine control system, processing the acquired state signals according to instructions of the control unit and simulating to complete a preset simulation mode of the steam turbine control system; the preset simulation mode comprises a self-checking mode, a semi-simulation mode and a full-simulation mode.

In this embodiment, the simulator is composed of two parts, namely hardware and software, and the hardware system may include two main parts, namely a simulator cabinet and an operator station (control unit), and auxiliary components, such as a communication cable and a signal cable. The manipulation unit may include a notebook computer 1.

The simulation unit takes the DPU controller and the input/output interface module as core elements, is used for completing signal acquisition, processing, real-time simulation operation of the through-flow part and the dynamic characteristic of the rotor, data storage and output, is communicated with the control unit, and can exchange signals with a steam turbine control system.

The control unit is a carrier of various application software and mainly completes functions of data communication with the simulation unit, parameter setting of the simulation machine, data management, data and graphic display, operation of the simulation machine and the like. The communication cable is a data channel for connecting the control unit and the simulation unit. The signal cable is a signal channel for connecting the simulation unit and the turbine control system. The software program in the control unit mainly comprises communication software, test software and application software. All functions of the simulation machine need to be completed under the participation of software.

Further, as shown in fig. 2 to 4, the simulation unit includes a cabinet 2, a guide rail 3, a cabinet installation back plate 4, a fan 5, a sliding wheel 7, a hanging ring 8, a controller 9, an MSV servomotor servo interface module 10, a GV servomotor servo interface module 11, an ICV servomotor servo interface module 12, a rotating speed pulse signal output interface module 13, an analog quantity signal output interface module 14, a switching quantity signal output interface module 15, an analog quantity signal isolation safety barrier 16, a 220VAC power supply module 17, a 220VAC power supply air switch 18, a 24VDC power supply air switch 19, a 220VAC power supply socket 20, a wiring terminal 21, a wiring duct 22, an in-cabinet wiring 23, an aviation connector socket installation box 24, an aviation connector socket 25, an aviation connector plug with a prefabricated cable and a communication cable 26,

a guide rail 3 and a cabinet installation back plate 4 are arranged in the cabinet 2, and a fixed analog quantity signal isolation safety barrier 16, a 220VAC power supply module 17, a 220VAC power supply air switch 18, a 24VDC power supply air switch 19, a 220VAC power supply socket 20 and a wiring terminal 21 are arranged on the guide rail 3; a fixed controller 9, an MSV servomotor servo interface module 10, a GV servomotor servo interface module 11, an ICV servomotor servo interface module 12, a rotating speed pulse signal output interface module 13, an analog quantity signal output interface module 14 and a switching value signal output interface module 15 are arranged on the cabinet installation back plate 4; fans 5 are respectively arranged on the front cabinet door and the rear cabinet door of the cabinet 2;

four corners of the bottom of the cabinet 2 are respectively provided with a sliding wheel 7, and four corners of the top of the cabinet 2 are respectively provided with a hanging ring 8; a trunking 22 is arranged inside the cabinet 2, and an in-cabinet wiring 23 is arranged in the trunking 22; an aviation connector socket installation box 24 is installed at the bottom in the cabinet 2, a plurality of aviation connector sockets 25 are installed on the aviation connector socket installation box 24 in a centralized mode, and the aviation connector sockets 25 are matched with aviation connector plugs with prefabricated cables and communication cables 26 in use.

In this embodiment, the simulation unit is a physical carrier for each function of the simulator. The cabinet 2 is a mounting carrier for the controller 9, various signal interface modules, various electrical elements, wiring in the cabinet and other components, and mainly plays a role in mounting and fixing the components of the simulator and shielding and protecting external signal interference. The fan 5 is used for dissipating heat in the cabinet 2. The sliding wheels 7 can comprise four wheels and are arranged at the bottom of the cabinet, so that the cabinet can be conveniently moved. Rings 8 can include four, install in the rack top, the hoist and mount and the transport of the rack of being convenient for. The analog quantity signal isolation safety barrier 16 is used for signal isolation between the analog quantity signal output interface module 14 and the steam turbine control system, and prevents damage to a clamping piece of the steam turbine control system and the analog quantity signal output interface module caused by electrical faults on two sides. The wiring terminal 21 is used for wiring among a controller, a signal interface module, an aviation plug and a power supply in the cabinet. Trunking 22 is used for installation and concealment of wiring within the cabinet. The wiring 23 in the cabinet is used for connecting various electric and electronic modules in the simulation cabinet to realize the transmission of signals and power supply. A plurality of aviation connector sockets 25 on the aviation connector socket installation box 24, which are used for signal input and output between the simulation machine and the steam turbine control system; one end of a prefabricated cable of the aviation connector plug is welded to a welding wire column of the aviation connector plug, and the other end of the prefabricated cable is in pressure joint with a cold pressure joint and used for being connected with a steam turbine control system. The communication cable 26 adopts a UTP copper cable twisted pair, two ends of the communication cable are connected with RJ45 crystal heads in a pressing mode, and the communication cable is connected with a notebook computer of the control unit and the controller 9 of the simulator through a network port and used for transmitting simulation data.

Further, as shown in fig. 2 to 5, the controller 9 is configured to complete processing of signals of the simulator and real-time operation of the turbine through-flow portion, the rotor dynamic characteristic mathematical model and the simulation program according to signals transmitted by the MSV servomotor servo interface module 10, the GV servomotor servo interface module 11, the ICV servomotor servo interface module 12, the rotation speed pulse signal output interface module 13, the analog signal output interface module 14, and the switching value signal output interface module 15 under an instruction of the control unit.

The controller 9 is a control unit taking a CPU operation and a signal processor as a core, and can complete the processing of signals of the simulator, the real-time operation of a turbine through-flow part and a rotor dynamic characteristic mathematical model and a simulation program, data communication and other functions.

Further, as shown in fig. 2 to 5, for the full simulation mode, the MSV servomotor servo interface module 10, the GV servomotor servo interface module 11, and the ICV servomotor servo interface module 12 sequentially receive a main steam valve driving instruction signal, a main steam regulating valve driving instruction signal, and a reheat regulating valve driving instruction signal sent by a turbine control system servo card, simulate and process mathematical models of the servomotor, the servo valve, and the LVDT through each interface module itself, and then feed back the main steam valve position signal, the main steam regulating valve position signal, and the reheat regulating valve position signal to the turbine control system servo card, thereby forming a turbine control system valve regulating closed loop.

Meanwhile, in a semi-simulation function mode, the control system only receives a valve opening signal sent by the steam turbine control system and uploads the signal to the controller. The module can provide signal interfaces for LVDTs of various types such as three-wire systems, four-wire systems, six-wire systems and the like. The module can receive the valve position control command of 4-20 mA, 10V or 40mA, and can output the valve position signal of 4-20 mA or 0-15 Vrms (AC). In the stage of delivery acceptance test of the steam turbine control system and unavailability of on-site real servomotor equipment, necessary conditions are provided for testing the functions of the steam turbine control system.

Further, as shown in fig. 5, the rotating speed pulse signal output interface module 13 receives a 4-20 mA rotating speed analog quantity current simulation signal generated by the operation of the controller 9, and converts the rotating speed analog quantity current simulation signal into a 3-path 5VDC or 12VDC or 24VDC adjustable pulse signal to output the signal to a turbine control system rotating speed card;

the analog quantity signal output interface module 14 receives 4-20 mA analog quantity current simulation signals of regulating stage pressure, low-pressure cylinder steam inlet pressure, unit power and generator current generated by operation of the controller 9, and expands each path of the 4-20 mA analog quantity current simulation signals into 3 paths of redundant 4-20 mA analog quantity current signals respectively to be output to a steam turbine control system;

the switching value signal output interface module 15 receives switching value simulation signals of on-off of each path of generator circuit breaker, on-off of 500KV circuit breaker, on-off of main transformer isolator, safe oil pressure low stop, fast load reduction and load pause generated by operation of the controller 9, and respectively expands the switching value simulation signals into 3 paths of redundant switching value signals to be output to a steam turbine control system.

Still further, as shown in FIG. 5, the 220VAC power air switch 18 is used to receive 220VAC power from outside the cabinet and to control the switching of the 220VAC power modules 17, 220VAC power outlets 20, and fan 5 power within the cabinet 2;

the 220VAC power supply module 17 is used for converting the 220VAC power supply of the 220VAC power supply air switch 18 into a 24VDC power supply and outputting the 24VDC power supply air switch 19 to be used as a working power supply of the controller 9 and simultaneously be used as a working power supply of various signal input and output interface modules in the cabinet;

the 24VDC power air switch 19 is used for receiving the 24VDC power output from the 220VAC power module 17 and is responsible for switching on and off the 24VDC working power of the cabinet internal controller and various signal input and output interface modules.

The 220VAC power socket 20 is used for receiving 220VAC power of the 220VAC power air switch 18 and providing 220VAC working power for the control unit, namely providing 220VAC working power for the notebook computer.

Still further, as shown in fig. 7, the test program module includes a function selection area and a test function display area, and is configured to implement an analog input test, an analog output test, a switching value input test, and a switching value output test:

The test program module is used for checking and correcting analog quantity input and output, and can check whether the switching value input and output are normal or not. The test software screen can be opened by double-clicking the test software icon under the directory of the notebook computer containing the software. As shown in fig. 7, the test program module includes two areas, which are a test function selection area and a test function display area. The test function is switched by clicking the function key of the test function selection area, and the test content of the test function display area is changed accordingly.

In the analog input test, a standard signal is added to a corresponding channel of the simulator, the numerical value in a display window behind the corresponding channel number is observed and compared with the actually input signal, if an error exists, the numerical value in a correction coefficient editing frame is corrected by correcting, and after data is corrected, a test button is clicked to enable the data to take effect. The data displayed in the display window is again observed until it is exactly coincident with the input signal. And after all the channels are verified, clicking a save button to save the modified data, and exiting the program. If the data is not modified, the exit button can be pressed directly to exit the program.

In the analog quantity output signal test, a numerical value is input into an editing frame behind a certain channel, the current value of the corresponding output channel on the simulator is observed by an ammeter and compared with the actually input numerical value, if an error exists, the numerical value in the editing frame is corrected by modifying a correction coefficient, and after data is modified, a test button is clicked to enable the test button to take effect. The ammeter values were again observed until they were in perfect agreement with the input values. And after all the channels are verified, clicking a save button to save the modified data, and exiting the program. If the data is not modified, the exit button can be pressed directly to exit the program.

In the switching value input test, the switching value input contact of the corresponding channel of the simulator can be short-circuited, the state change of the indicator light of the corresponding channel is observed to judge whether the switching value input is effective or not, the indicator light is red to indicate on, and the indicator light is green to indicate off.

In the switching value output test, a certain channel in fig. 7 can be selected, and the switching state of the corresponding switching value output channel is observed to judge whether the switching value output channel is effective. And pressing an exit button to exit the software after completion.

Still further, as shown in fig. 8, the simulation program module receives an electric signal of a high-pressure main valve MSV, a high-pressure regulating valve GV, a reheat regulating valve ICV opening instruction or a servomotor stroke of the steam turbine control system, performs thermal modeling on the steam turbine set according to a steam turbine transfer function mathematical model, and transmits the obtained model and simulation parameters to the controller 9; and then, regulating stage pressure, low-pressure cylinder inlet pressure, unit power and rotating speed of the steam turbine running alone and in grid-connected operation are simulated based on the steam turbine through-flow part and rotor dynamic characteristics transmitted by the controller 9 and transmitted to a steam turbine control system to form a closed loop, and simulation is completed through a semi-simulation mode or a full-simulation working mode.

In the embodiment, the simulation program module can receive electric signals from a high-pressure main throttle (MSV), a high-pressure regulating Gate (GV) and a reheat regulating throttle (ICV) servo card or the stroke (or opening) of an oil-powered machine of a nuclear turbine control system, simulate the regulation stage pressure, the low-pressure cylinder steam inlet pressure, the unit power, the rotating speed and the like during the ascending speed, the single-machine operation and the grid-connected operation based on the through-flow part of the nuclear turbine and the dynamic characteristics of a rotor, input the signals into the nuclear turbine control system in a simulation electric signal mode, enable the nuclear turbine control system and the simulator to form a closed loop, simulate the actual operation environment for the nuclear turbine control system in real time, detect the control function of the nuclear turbine control system, evaluate the control quality, seek the optimization setting of control parameters and develop a new control algorithm, and generate a simulation tripping signal, and (4) carrying out load shedding and turbine protection system trip emergency condition examination tests on the turbine control system.

Still further, as shown in fig. 8 to 11, the simulation program module includes parameter setting, simulation operation and data management functions,

the parameter setting is to set and store preset parameters in a file form and comprises channel setting, servo valve parameter setting, steam turbine dynamic parameter setting, simulation parameter setting and display parameter setting;

As shown in fig. 8, the simulation program module may further include four auxiliary buttons: import, export, download, and exit. The parameter setting is to set necessary parameters before the simulation is run. Once the parameters are set, the settings may be saved in file form. In the case where no modification of the parameters is required, the resetting is no longer necessary. And clicking a parameter setting key on the main picture to enter a parameter setting picture.

As shown in fig. 9, the parameter setting screen is composed of two areas, which are a parameter setting function selection area and a parameter setting display area, and the parameter setting function mainly includes six items, which are channel setting, servo valve parameter setting, steam valve parameter setting, turbine dynamic parameter setting, simulation parameter setting and display parameter setting, and the parameter setting function is switched by each button corresponding to the six buttons at the top in fig. 9, and the parameter to be set corresponding to the button is displayed in the parameter setting display area when the different button is clicked. The various parameter setting functions and setting parameters are as follows:

setting a channel: and selecting analog quantity input and output channels according to the number of the steam turbine valves needing simulation.

Setting servo valve parameters: and the servo system gain of the servo valve, and the uplink time constant and the downlink time constant of the servomotor are set.

Setting parameters of a steam valve: the valve opening flow curve is used for setting a high-pressure main valve (MSV), a high-pressure regulating valve (GV) and a reheating regulating valve (ICV).

Setting dynamic parameters of the steam turbine: the method is used for setting a high-pressure cylinder volume time constant, a low-pressure cylinder volume time constant, a high-pressure cylinder high power coefficient, a low-pressure cylinder power coefficient, rotor moment of inertia, a generator power time constant, no-load mechanical loss, an asynchronous power damping coefficient and a power feedback coefficient.

Setting simulation parameters: the simulation system is used for setting working modes (self-checking, semi-simulation and full simulation), unit power (rated power of a unit to be simulated) and rated pressure (rated pressure of main steam of the unit to be simulated) of the simulator; the self-checking working mode is that the simulator is not connected with a steam turbine control system, and the regulator inside the simulator is used for replacing the function of the steam turbine control system and checking whether the simulator works normally or not; the semi-simulation working mode is that an electro-hydraulic servo valve, a servomotor and an LVDT of a steam turbine set are used, other parts of a steam turbine are simulated by a simulator, a steam turbine control system is actually connected with the servo valve and the LVDT, an opening signal of the servomotor is transmitted to the simulator by the steam turbine control system, and the simulation result is closer to the real effect of the steam turbine; the full-simulation working mode means that signals of a steam turbine control system directly drive a simulator, and the servo valve, the servomotor, the LVDT and other links of the steam turbine are simulated by the simulator.

Setting display parameters: the method is used for setting parameters which need to be displayed on a simulation picture in real time.

Referring to fig. 8, the simulation operation refers to entering a simulation interface by clicking a simulation function button on a screen under the condition that the parameter setting is completed.

As shown in fig. 10, the simulation operation interface includes four areas, which are a state display area, a curve display area, a parameter display area, and a simulation operation area.

Wherein the status display area: is positioned above the screen and respectively comprises the following components from left to right: simulation mode (self-test/semi-simulation/full simulation), turbine operating status (waiting/speed-up/stand-alone/grid-connected/off-line), on-hook status indicator light, OPC status indicator light, AST status indicator light, main steam pressure display, tachometer, electric power display and operating time display.

The curve display area: and the display screen is positioned in the middle main body part of the screen and is used for displaying the output parameter curves in different colors. In the rectangular area, the abscissa direction is a time axis, the ordinate direction is a data amplitude, a numerical tracking cursor is arranged in the display area, and the display area can simultaneously display any data curve.

A parameter display area: and the data name, the color and the numerical value displayed in the curve display area are displayed at the lower part of the curve display area, the displayed numerical value can be the latest numerical value or the numerical value fixed at a certain moment, and the switching (cursor following/cursor fixing) is carried out through a cursor control button in the simulation operation area.

A simulation operation area: is positioned at the right side of the screen and is used for operating the simulation machine. The four keys at the top: the system comprises a speed raising unit, a single machine, a grid connection unit and a splitting unit, and is used for switching the running state of the steam turbine generator unit; the system comprises a hanging switch operation key, a stop key, a load pause key, a quick load reduction key, a synchronous input, a synchronous cut, a synchronous increase, a synchronous decrease, a GCB circuit breaker key, a main transformer isolation switch key and a power grid circuit breaker key, wherein the hanging switch operation key, the stop key, the load pause key, the quick load reduction key, the synchronous input, the synchronous cut, the synchronous increase and the synchronous decrease are used for simulating conditions for triggering the change of the operation working condition of the unit; the cursor control key, the magnification key and the reduction key are used for controlling the size of a cursor and an amplitude value in the display area; the run key, the stop key, the change confirm key and the return main menu key are used for controlling the process of the simulation.

As shown in fig. 11, the data management means that the simulation machine can store simulation data in real time, and the extension of the simulation data file is data. In the simulation run main screen, the data management key is clicked, and the data management screen is entered, as shown in fig. 11. The data management screen is provided with a display file, a delete file and an exit key, and the three keys can display and call the stored simulation data, delete the outdated file and exit the data management.

Still further, as shown in fig. 3, the control unit includes a notebook computer 1, and the notebook computer 1 is disposed on a foldable computer desk 6 in the cabinet 2.

The folding computer desk 6 is used for placing the notebook computer 1 during the simulation operation.

The simulation flow of the present embodiment:

referring to fig. 12, based on the software and hardware functions and structure of the above-mentioned simulation machine, the simulation flow of the simulation machine is as follows:

1. and (4) setting parameters, namely clicking a parameter setting key on the main picture of figure 8 to enter a parameter setting picture, as shown in figure 9. Firstly, setting channel parameters, servo valve parameters, steam valve parameters and dynamic parameters of a steam turbine in sequence; secondly, setting simulation parameters, selecting a working mode of the simulator, and performing self-checking, semi-simulation or full simulation; and finally, setting display parameters according to the working mode.

2. Standby: after the parameter setting is finished, clicking a simulation button on a main picture, entering a simulation picture, and displaying the standby state of the running state of the steam turbine, namely waiting for the simulation operation.

3. The simulation operation area shown in fig. 10 is clicked to enter the simulation turbine speed-up stage, and the turbine operation state is displayed as "speed-up".

4. Stand-alone: after the simulation rotating speed of the steam turbine reaches 3000RPM, clicking a 'single machine' key in a simulation operating area in the graph 10, enabling the simulation machine to enter a stage of simulating the rated rotating speed of a single machine of the steam turbine from a speed-up stage, displaying the running state of the steam turbine as a 'single machine', and performing related simulation test operation at the stage.

5. Grid connection: after the operation stage of the single machine is finished, a grid-connected key is clicked in the simulation operation area in fig. 10, the simulation machine enters the simulation steam turbine grid-connected operation stage from the speed increasing stage, the operation state of the steam turbine is displayed as grid-connected, and relevant simulation test operations can be performed at the stage.

6. Splitting: after the grid-connected operation of the simulator is completed, the 'splitting' key is clicked in the simulation operation area in fig. 10, and the simulator enters the splitting operation stage of the simulated steam turbine from the grid-connected stage. The turbine operating state is shown as "split".

7. And (5) finishing simulation: after the simulation operation is finished, a stop key is clicked in the simulation operation area, the simulation machine stops working, a return main picture is clicked to return to the simulation main picture, a dialog box is popped up, and a user is reminded to store simulation data.

In the embodiment, three simulation modes, namely a self-checking mode, are used for checking whether the simulation machine works normally by utilizing an internal regulator to replace the function of a steam turbine control system under the condition that the simulation machine is not connected with the steam turbine control system; the semi-simulation mode can be used in the available stage of on-site execution mechanisms such as power plant debugging and the like; the full simulation mode can be applied to the unavailable stage of the local execution mechanism such as delivery acceptance of the steam turbine control system.

In the embodiment, the simulator can be in signal interface with the servo cards of the steam turbine control systems of different brands, can simulate LVDT signals of various models such as a three-wire system, a four-wire system and a six-wire system in a full simulation mode, and has interface universality.

The specific embodiment is as follows:

the present invention will be described in detail with reference to examples. On the premise of not departing from the concept of the scheme of the invention, a plurality of changes and improvements can be made according to different structures of the nuclear power turbine (such as 1 high-pressure cylinder and 3 low-pressure cylinders, 1 high-pressure cylinder and 2 low-pressure cylinders, and 1 high-pressure cylinder and 1 low-pressure cylinder), which belong to the protection scope of the invention.

The simulation machine of the nuclear power turbine control system is designed according to the model structure of 1 high-pressure cylinder (provided with 4 high-pressure main steam valves MSV and 4 high-pressure regulating valves GV) and 3 low-pressure cylinders (provided with 6 reheating regulating valves), the maximization of the number of the valves and the number of the low-pressure cylinders of the nuclear power turbine is considered, the universality of the simulation machine is ensured, and the simulation machine can be suitable for other nuclear power turbine models by modifying the parameters of a unit on line.

In specific implementation, the control unit can be an operator station and comprises a notebook computer, and the simulation unit can be a simulation cabinet body and also comprises auxiliary components such as a communication cable and a signal cable.

As shown in fig. 2 to fig. 5, the hardware configuration, function, circuit and signal transmission relationship of each part of the simulation machine includes:

the notebook computer hardware can be the mainstream configuration on the current market, and a Windows XP, Win7 or Win8 operating system is installed. The operator station is a carrier of various application software and mainly completes data communication with a simulation machine cabinet body, parameter setting, data management, data and graphic display of the simulation machine and operation of the simulation machine.

The rack is the installation carrier of parts such as controller, various signal interface module, various electric elements and the interior wiring of cabinet, mainly plays the simulator spare part installation fixed, external signal interference shielding and guard action, and the rack size (do not contain the removal wheel): 2000mm (height) x800mm (width) x800mm (depth).

The rails may comprise 2 DIN rails of 1600mm length and 8 DIN rails of 540mm length.

Cabinet installation backplate size: 1700mm (length) x700mm (width).

The folding computer desk can be arranged in the middle of the inner side of the front cabinet door and used for placing a notebook computer during simulation operation, and the computer desk can be folded and unfolded through folding hinges fixed with the front door of the cabinet at two sides.

The sliding wheel adopts a universal wheel structure, so that the cabinet body of the simulation machine can conveniently move in any direction, the sliding wheel is provided with a locking device, and after the cabinet body of the simulation machine is in place, the cabinet body is prevented from moving and is prevented from sliding through the locking device of the sliding wheel.

Woodward Flex500 controller is selected, the Flex controller 500 is a special control platform for a new generation of Woodward turbine unit, software is based on a VxWorks operating system, and the control period is up to 5 ms. Flex500 also has strong networking capability, CAN communicate with peripheral devices over an ethernet/serial/CAN bus, and CAN extend Woodward's real time control module RTCNet over the CAN bus.

In the embodiment, 4 MSV servomotor servo interface modules, 4 GV servomotor servo interface modules and 6 ICV servomotor servo interface modules are adopted, and under a full simulation function mode, Main Steam Valve (MSV), main steam regulating valve (GV) and reheating regulating valve (ICV) servo valve driving instruction signals sent by a steam turbine control system servo card are received, and valve position signals of the Main Steam Valve (MSV), the main steam regulating valve (GV) and the reheating regulating valve (ICV) are respectively fed back to the steam turbine control system servo card through the module self-simulation mathematical models of the servomotors, the servo valves and the LVDT, so that a steam turbine control system valve regulation closed loop is formed; meanwhile, in a semi-simulation function mode, the control system can only receive a valve opening signal sent by the steam turbine control system and upload the signal to the controller. The module can provide signal interfaces for LVDTs of various types such as three-wire systems, four-wire systems, six-wire systems and the like. The module can receive the valve position control command of 4-20 mA, 10V or 40mA, and can output the valve position signal of 4-20 mA or 0-15 Vrms (AC).

And 1 rotating speed pulse signal output interface module is adopted to receive 4-20 mA rotating speed analog quantity current simulation signals generated by the operation of the controller, and the rotating speed signals are converted into 3 paths of 5VDC or 12VDC or 24VDC adjustable pulse signals to be output to a rotating speed card of a steam turbine control system.

The method comprises the steps of adopting 2 analog quantity signal output interface modules, receiving 4-20 mA analog quantity current simulation signals of regulating stage pressure, low-pressure cylinder steam inlet pressure, unit power, generator current and the like generated by operation of a controller, expanding the signals into 3 paths of redundant 4-20 mA analog quantity current signals respectively, and outputting the signals to a steam turbine control system.

And 6 switching value signal output interface modules are adopted to receive switching value simulation signals generated by the operation of the controller, and the signals are respectively expanded into 3 paths of redundant switching value signals to be output to a steam turbine control system.

And 9 analog quantity signal isolation safety barriers are adopted and used for signal isolation between the analog quantity signal output interface module of the simulator and the steam turbine control system.

The air switch is used for receiving 220VAC power supply from the outside of the cabinet and is responsible for simulating the connection and disconnection of a 220VAC power supply module, a 220VAC power socket power supply and a 220VAC cabinet fan power supply in the cabinet.

The system adopts 1 220VAC power supply module which is responsible for converting 220VAC power received from a 220VAC power supply air switch into 24VDC power and outputting the 24VDC power to the 24VDC power supply air switch and is used for a simulation machine controller, various signal input and output interface modules and a working power supply of a signal isolation safety barrier.

1 24VDC power supply air switch is adopted; a1-piece 220VAC power outlet is used for receiving 220VAC power from a 220VAC power air switch and providing 220VAC working power for a notebook computer of an operator station.

And 91 wiring terminals are adopted for wiring among the controller, the signal interface module, the signal isolation safety barrier, the aviation plug, the power supply module, the air switch and the fan in the cabinet.

The wire grooves are made of PVC materials with specifications of 80(mm) x100(mm) x50(mm) and 50(mm) x100(mm) x50 (mm). The wiring in the cabinet is used for connecting various electric and electronic modules in the simulation cabinet to realize the transmission of signals and power supplies.

1 aviation connector socket installation box is adopted, and 22 aviation connector sockets are installed in the aviation connector socket installation box in a centralized mode and used for inputting and outputting signals between a simulation machine and a steam turbine control system; 22 aviation connector sockets and 22 aviation connector plugs with prefabricated cables are matched for use, the aviation connector plugs are provided with 10m long prefabricated cables, one ends of the prefabricated cables are welded to welding wire columns of the aviation connector plugs, and the other ends of the prefabricated cables are in press connection with cold press connectors for being connected with a steam turbine control system.

In fig. 4, C1 adopts a 7-pin aviation connector for connecting with the tachometer pulse signal output interface module; c2 and C3 adopt 12-pin aviation connectors and are respectively used for connecting 1 analog quantity signal output interface module; the C4 adopts an 8-pin aviation connector and is used for connecting 4 externally input switching value signals; C5-C8 adopt 20-pin aviation connectors and are used for connecting 6 switching value signal output interface modules; and C9-C22 adopt 20-pin aviation connectors which are respectively used for connecting 14 MSV/GV/ICV servomotor servo interface modules.

The cable adopts a UTP copper cable twisted pair, two ends of the cable are connected with RJ45 crystal heads in a pressing mode, and the cable is connected with a notebook computer of an operator station and a simulator controller through a network port and used for simulating data transmission.

The simulation software of the embodiment mainly comprises two parts, namely test software and simulation software which are installed in a notebook computer.

The test software is used to check and correct the analog input and output, and can check whether the switching value input and output are normal. And double-clicking a 'test software' icon under a directory containing software of the notebook computer, and opening a test software picture.

And then clicking the function key in the test function selection area in fig. 7 to switch the test function, and changing the test content in the test function display area.

The simulation software is used for logic configuration, picture design, simulation setting, parameter display, simulation operation and operation of the simulator.

As shown in fig. 6, the parameters in the turbine transfer function in the present embodiment are set as follows:

TABLE 1 transfer function parameter table of steam turbine

The simulator of the embodiment receives 4 high-pressure main valves MSV, 4 high-pressure adjusting valves GV and 6 electric signals of reheating adjusting valve ICV opening instructions or oil-actuated machine strokes from a steam turbine control system through a special input signal interface module, simulates the regulation stage pressure, low-pressure cylinder steam inlet pressure, unit power, rotating speed and the like during single-machine operation and grid-connected operation, inputs the signals to the steam turbine control system in a simulated electric signal mode to form a closed loop, and completes simulation through a semi-simulation or full-simulation working mode.

Setting a channel: this simulator is equipped with 68 analog output channels altogether, 3 pulse output channels, 4 switching value input channels, 52 switching value output channels, 56 analog input signal channels, can be applicable to the requirement of most nuclear power turbine types.

Setting parameters of a servo valve: see table 1 "turbine transfer function parameter table".

Setting parameters of a steam valve: valve opening flow curves of 4 high-pressure main valves (MSV), 4 high-pressure regulating valves (GV) and 6 reheating regulating valves (ICV) are set, parameter setting is carried out by adopting a point tracing method according to valve characteristic curves provided by the thermal profession, and 20 points are collected by each valve characteristic curve for setting.

Setting dynamic parameters of the steam turbine: the method is used for setting a high-pressure cylinder volume time constant, a low-pressure cylinder volume time constant, a high-pressure cylinder power coefficient, a low-pressure cylinder power coefficient, a high-pressure cylinder power natural overshoot coefficient, a steam turbine speed-up time constant, a generator power time constant, no-load mechanical loss, an asynchronous power damping coefficient, a power feedback coefficient, a regulation stage pressure coefficient, a reheater pressure coefficient and a current coefficient. The dynamic parameter settings of each steam turbine in this embodiment are shown in "steam turbine transfer function parameter table" in table 1.

Setting simulation parameters: the working mode of the simulation machine set in the embodiment can be set to be a self-checking mode, a semi-simulation mode or a full-simulation mode, the power of the unit is 1250MW, and the rated pressure is 5.4 Mpa; the semi-simulation working mode is that an electro-hydraulic servo valve, a servomotor and an LVDT of a steam turbine set are used, other parts of a steam turbine are simulated by a simulator, a steam turbine control system is actually connected with the servo valve and the LVDT, an opening signal of the servomotor is transmitted to the simulator by the steam turbine control system, and the simulation result is closer to the real effect of the steam turbine; the full-simulation working mode means that signals of a steam turbine control system directly drive a simulator, and the servo valve, the servomotor, the LVDT and other links of the steam turbine are simulated by the simulator.

Setting display parameters: the parameters to be displayed in real time on the simulation screen are set, and the display parameters set by the embodiment are shown in the parameter display area of fig. 10.

The simulation flow of the present embodiment is the simulation flow described above, as shown in fig. 12.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims

1. A universal nuclear turbine control system simulator is characterized by comprising a control unit and a simulation unit;

the simulation unit is used as a physical carrier controlled by the control unit and used for acquiring state signals of the steam turbine control system, processing the acquired state signals according to instructions of the control unit and simulating to complete a preset simulation mode of the steam turbine control system; the preset simulation mode comprises a self-checking mode, a semi-simulation mode and a full-simulation mode;

the test program module comprises a function selection area and a test function display area and is used for realizing analog input test, analog output test, switching value input test and switching value output test:

2. The universal nuclear turbine control system simulator according to claim 1,

the simulation unit comprises a cabinet (2), a guide rail (3), a cabinet installation back plate (4), a fan (5), a sliding wheel (7), a hanging ring (8), a controller (9), an MSV servomotor servo interface module (10), a GV servomotor servo interface module (11), an ICV servomotor servo interface module (12), a rotating speed pulse signal output interface module (13), an analog quantity signal output interface module (14), a switching quantity signal output interface module (15), an analog quantity signal isolation safety grid (16), a 220VAC power module (17), a 220VAC power air switch (18), a 24VDC power air switch (19), a 220VAC power socket (20), a wiring terminal (21), a wire groove (22), an in-cabinet wiring (23), an aviation connector socket installation box (24), an aviation connector socket (25), an aviation connector plug with a prefabricated cable and a communication cable (26),

a guide rail (3) and a cabinet installation back plate (4) are arranged in the cabinet (2), and a fixed analog quantity signal isolation safety barrier (16), a 220VAC power supply module (17), a 220VAC power supply air switch (18), a 24VDC power supply air switch (19), a 220VAC power supply socket (20) and a wiring terminal (21) are arranged on the guide rail (3); a fixed controller (9), an MSV servomotor servo interface module (10), a GV servomotor servo interface module (11), an ICV servomotor servo interface module (12), a rotating speed pulse signal output interface module (13), an analog quantity signal output interface module (14) and a switching quantity signal output interface module (15) are arranged on a cabinet mounting back plate (4); fans (5) are respectively arranged on the front cabinet door and the rear cabinet door of the cabinet (2);

four corners of the bottom of the cabinet (2) are respectively provided with a sliding wheel (7), and four corners of the top of the cabinet (2) are respectively provided with a hanging ring (8); a wire casing (22) is arranged in the cabinet (2), and an in-cabinet wiring (23) is arranged in the wire casing (22); aviation connector socket installation box (24) is installed to bottom in rack (2), and a plurality of aviation connector sockets (25) of concentrated installation on aviation connector socket installation box (24), aviation connector socket (25) and the supporting use of aviation connector plug and communication cable (26) of taking the prefabricated cable.

3. The universal nuclear turbine control system simulator according to claim 2,

and the controller (9) is used for processing signals of the simulator and performing real-time operation on a turbine through-flow part, a rotor dynamic characteristic mathematical model and a simulation program according to signals transmitted by the MSV servomotor servo interface module (10), the GV servomotor servo interface module (11), the ICV servomotor servo interface module (12), the rotating speed pulse signal output interface module (13), the analog quantity signal output interface module (14) and the switching quantity signal output interface module (15) under the instruction of the control unit.

4. The universal nuclear turbine control system simulator according to claim 3,

for a full simulation mode, the MSV servomotor servo interface module (10), the GV servomotor servo interface module (11) and the ICV servomotor servo interface module (12) sequentially receive a main steam valve driving instruction signal, a main steam regulating valve driving instruction signal and a reheat regulating valve driving instruction signal which are sent by a turbine control system servo card, the mathematical models of the servomotor, the servo valve and the LVDT are simulated and processed through each interface module, and then the main steam valve position signal, the main steam regulating valve position signal and the reheat regulating valve position signal are fed back to the turbine control system servo card.

5. The universal nuclear turbine control system simulator according to claim 3 or 4,

the rotating speed pulse signal output interface module (13) receives a 4-20 mA rotating speed analog quantity current simulation signal generated by the operation of the controller (9), converts the rotating speed analog quantity current simulation signal into a 3-path 5VDC or 12VDC or 24VDC adjustable pulse signal and outputs the signal to a rotating speed card of a steam turbine control system;

the analog quantity signal output interface module (14) receives 4-20 mA analog quantity current simulation signals of regulating stage pressure, low-pressure cylinder steam inlet pressure, unit power and generator current generated by operation of the controller (9), and expands each path of the 4-20 mA analog quantity current simulation signals into 3 paths of redundant 4-20 mA analog quantity current signals respectively to be output to a steam turbine control system;

and the switching value signal output interface module (15) receives switching value simulation signals of generator circuit breaker on-off, 500KV circuit breaker on-off, main transformer isolator on-off, safe oil pressure low stop, fast load reduction and load pause load increase generated by the operation of the controller (9), and respectively expands the switching value simulation signals into 3 paths of redundant switching value signals to be output to a steam turbine control system.

6. The universal nuclear turbine control system simulator as recited in claim 5,

the 220VAC power air switch (18) is used for receiving an external 220VAC power and controlling the on-off of the 220VAC power module (17), the 220VAC power socket (20) and the fan (5) in the cabinet (2);

the 220VAC power supply module (17) is used for converting a 220VAC power supply of the 220VAC power supply air switch (18) into a 24VDC power supply and outputting the 24VDC power supply air switch (19) as a working power supply of the controller (9);

the 220VAC power socket (20) is used for receiving 220VAC power of the 220VAC power air switch (18) and providing 220VAC working power for the control unit.

7. The universal nuclear turbine control system simulator according to claim 1,

the simulation program module receives electric signals of a high-pressure main valve MSV, a high-pressure adjusting valve GV and a reheating adjusting valve ICV opening instruction or an oil-operated machine stroke of a steam turbine control system, performs thermal modeling on a steam turbine set according to a steam turbine transfer function mathematical model, and transmits the obtained model and simulation parameters to a controller (9); and then regulating stage pressure, low-pressure cylinder inlet pressure, unit power and rotating speed of the steam turbine running alone and in grid-connected operation are simulated based on the steam turbine through-flow part and rotor dynamic characteristics transmitted by the controller (9) and transmitted to a steam turbine control system to form a closed loop, and simulation is completed through a semi-simulation mode or a full-simulation working mode.

8. The universal nuclear turbine control system simulator according to claim 7,

the simulation program module comprises parameter setting, simulation operation and data management functions,

9. The universal nuclear turbine control system simulator according to claim 1,

the control unit comprises a notebook computer (1), and the notebook computer (1) is arranged on a folding computer desk (6) in the cabinet (2).