CN110119591B - Oil motor simulation device - Google Patents
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- CN110119591B CN110119591B CN201910430450.7A CN201910430450A CN110119591B CN 110119591 B CN110119591 B CN 110119591B CN 201910430450 A CN201910430450 A CN 201910430450A CN 110119591 B CN110119591 B CN 110119591B
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Abstract
A kind of oil motor simulation device, involve a kind of oil motor simulation technology, in order to meet the functional test of DEH. The interface management module is connected with a steam turbine control system; the interface management module is connected with the steam turbine control system simulator; the command signal end of the interface management module is connected with the command signal end of the state command module; the communication signal input/output end of the interface management module is connected with the communication signal input/output end of the communication module; the position signal input and output end of the interface management module is connected with the position signal input and output end of the engine model; the operation signal input and output end of the interface management module is connected with the operation signal input and output end of the LVDT model; the state signal input and output end of the state command module is connected with the state signal input and output end of the communication module; the simulation signal output end of the oil motor model is connected with the simulation signal input end of the LVDT model. The method has the advantages of short control period, high response speed, stable control period and high reliability.
Description
Technical Field
The invention relates to a simulation technology of an oil motor.
Background
The turbine engine simulation is a key technology for realizing a full simulation function of a turbine control system (DEH) simulator. In a full simulation function mode, the oil motor simulation device receives a Main Steam Valve (MSV) \main steam regulating valve (GV) \reheat regulating valve (ICV) servo valve driving command signal sent by the DEH servo card, simulates the actions of a double-coil servo valve and an oil motor and valve position feedback of a Linear Variable Differential Transformer (LVDT), and then outputs an LVDT valve position feedback signal simulated by a simulator to the DEH for the DEH to form a valve position closed loop control circuit, so that the function of the DEH is tested. Therefore, the oil motor simulation is a key technology for realizing the simulation function of the steam turbine control system (DEH) simulator, and has extremely important significance for realizing the design and manufacture of the DEH simulator by grasping the technology.
Disclosure of Invention
The invention aims to meet the functional test of DEH and provides an oil motor simulation device.
The invention relates to a simulation device of an oil motor, which comprises an interface management module, a state command module, an oil motor model, an LVDT model and a communication module;
the interface signal input and output end of the interface management module is connected with the interface signal input and output end of the steam turbine control system; the analog signal input and output end of the interface management module is connected with the analog signal input and output end of the steam turbine control system simulator;
the command signal input and output end of the interface management module is connected with the command signal input and output end of the state command module; the communication signal input/output end of the interface management module is connected with the communication signal input/output end of the communication module; the position signal input and output end of the interface management module is connected with the position signal input and output end of the engine model; the operation signal input and output end of the interface management module is connected with the operation signal input and output end of the LVDT model;
the state signal input and output end of the state command module is connected with the state signal input and output end of the communication module;
and the simulation signal output end of the oil motor model is connected with the simulation signal input end of the LVDT model.
The invention discloses an oil motor simulation device, which is used for receiving a Main Steam Valve (MSV) \main steam regulating valve (GV) \reheat regulating valve (ICV) servo valve driving command signal sent by a DEH servo card by a steam turbine control system simulator in a full simulation function mode, simulating the actions of a double-coil servo valve and an oil motor and valve position feedback of a Linear Variable Differential Transformer (LVDT), outputting LVDT valve position feedback signals simulated by the simulator to the DEH, and forming a valve position closed-loop control loop by the DEH, so that the function of the DEH is tested.
The invention has the advantages that the oil motor simulation device can meet the test of the DEH function, and has the characteristics of short control period, high response speed, stable control period and high reliability.
Drawings
FIG. 1 is a schematic diagram of an oil motor simulation device according to an embodiment;
FIG. 2 is a schematic diagram of a software of an oil motor simulation device according to an embodiment;
FIG. 3 is a schematic diagram of a hardware circuit of an oil motor simulation device according to an embodiment;
FIG. 4 is a schematic diagram illustrating a simulation process of a simulation device of an oil motor according to an embodiment;
fig. 5 is a schematic structural diagram of an interface management module in the second embodiment;
fig. 6 is a schematic diagram illustrating a simulation signal flow of a simulation device of a fourth embodiment of the present invention.
Detailed Description
The first embodiment is as follows: referring to fig. 1 to 4, a description is given of the present embodiment, in which an oil motor simulation apparatus according to the present embodiment includes an interface management module 1, a status command module 2, an oil motor model 3, an LVDT model 4, and a communication module 5;
the interface signal input and output end of the interface management module 1 is connected with the interface signal input and output end of the steam turbine control system 6; the analog signal input and output end of the interface management module 1 is connected with the analog signal input and output end of the steam turbine control system simulator 7;
the command signal input and output end of the interface management module 1 is connected with the command signal input and output end of the state command module 2; the communication signal input and output end of the interface management module 1 is connected with the communication signal input and output end of the communication module 5; the position signal input and output end of the interface management module 1 is connected with the position signal input and output end of the engine model 3; the operation signal input and output end of the interface management module 1 is connected with the operation signal input and output end of the LVDT model 4;
the state signal input and output end of the state command module 2 is connected with the state signal input and output end of the communication module 5;
the simulation signal output end of the oil motor model 3 is connected with the simulation signal input end of the LVDT model 4.
The schematic software diagram of the oil motor simulation device according to the embodiment is shown in fig. 2, and in fig. 2, the oil motor simulation device outputs an oil motor position signal according to an input servo valve position command (+ -40 mA) and an adjustable oil motor system parameter; the output servomotor position signals comprise simulated 2 paths of LVDT voltage signal outputs (0-15 Vrms) and 1 path of current signal outputs (4-20 mA); meanwhile, the schematic diagram of the hardware circuit of the oil motor simulation device is shown in fig. 3, wherein the state command module 2, the oil motor model 3, the LVDT model 4 and the communication module 5 are implemented in a CPU, and the CPU comprises but is not limited to an embedded control system, a singlechip or an FPGA; the outside can set up the systematic parameter of the servomotor through RS485 communication interface, and send the internal control information to the external equipment; the CPU adopts a 32-bit digital controller, adopts a real-time control operating system (RTOS), has a system control period of less than 50ms, and has the characteristics of high corresponding speed, stable control period and high reliability.
In the present embodiment, as shown in fig. 4, the turbine control system 6 is an AP1000 standard nuclear turbine control system, and the turbine control system 6 controls a Main Steam Valve (MSV) driven by a 4-way servo valve, a main steam regulating valve (GV) driven by a 4-way servo valve, and a reheat regulating valve (ICV) driven by a 6-way servo valve; wherein each path of servo valve is driven to be controlled by double redundancy; the valve position command of the steam turbine control system 6 is a servo valve control command output by +/-40 mA current, and the servo card of the steam turbine control system 6 provides a double-redundancy LVDT primary coil excitation signal and receives an LVDT valve position feedback signal which is calculated and output by the simulation of the oil motor simulation device; because of adopting double redundancy control, the control command output of the servo valve is 2 paths of +/-40 mA signals to drive the servo valve, and 2 LVDTAs are respectively LVDTA and LVDTB.
The second embodiment is as follows: the present embodiment is further limited to the first embodiment of an oil motor simulation device, and in this embodiment, the interface management module 1 includes a servo valve coil input interface 1-1, an analog output interface 1-2, a power interface 1-3, an LVDTA interface 1-4, an LVDTB interface 1-5, and a communication interface 1-6;
the servo valve coil input interface 1-1 is used for receiving two paths of servo valve coil driving signals of the oil motor output by a servo card of the steam turbine control system 6 and respectively sending the two paths of servo valve coil driving signals of the oil motor to the oil motor model 3 and the LVDT model 4;
the power interface 1-3 is used for connecting an externally provided power supply;
the LVDTA interfaces 1-4 and the LVDTB interfaces 1-5 are used for respectively receiving LVDT primary coil excitation signals provided by the steam turbine control system 6; if only a single LVDT primary coil is provided by the turbine control system 6, receiving an excitation signal through the LVDTA interfaces 1-4 or the LVDTB interfaces 1-5; after receiving the position simulation signals of the oil motor model 3, respectively outputting two secondary coil voltage signals of two groups of LVDTs to the steam turbine control system 6;
the simulation output interface 1-2 is used for simulating and outputting a position simulation signal of the engine model 3 and sending the simulated position simulation signal to the steam turbine control system simulator 7
The communication interfaces 1-6 are used for communicating with the steam turbine control system simulator 7; thereby transmitting the state information in the state command module 2 to the turbine control system simulator 7, and transmitting the received command information of the turbine control system simulator 7 to the state command module 2.
Interface management module 1 terminal information is as follows:
and a third specific embodiment: the present embodiment is further defined by the first embodiment, wherein the state command module 2 includes a state information module and a command information module;
the state information module is used for simulating output fault information and acquiring input and output numerical information of the servo valve coil input interface 1-1, the LVDTA interface 1-4 and the LVDTB interface 1-5;
the command information module is used for sending a prohibition command to the output signals of the LVDTA interfaces 1-4 and the LVDTB interfaces 1-5, sending a prohibition command to the output analog position simulation signals of the analog output interfaces 1-2, and sending zero instructions p0 related to the LVDTA interfaces 1-4 and the LVDTB interfaces 1-5.
In the present embodiment, the status command module 2 is implemented in the CPU, and the detailed information is shown in the following table.
The specific embodiment IV is as follows: the present embodiment is further limited to the third embodiment, in which the simulation signal output by the engine model 3 is implemented by a transfer function, and the transfer function is:
wherein p is the simulation position of the engine model 3; coilA is the signal of servo coil A; coilB is a signal of a servo coil B; servo valve gain of Ks; ts is the prime mover time constant; s is a complex variable.
In the present embodiment, the simulation position p of the engine model 3 is output to the interface management module 1 and the LVDT model 4;
the oil motor simulation device receives valve position instructions of a steam turbine control system 6, drives an oil motor simulation model 3, feeds back valve position voltage signals of two groups of LVDT secondary coils obtained through simulation to the steam turbine control system 6 after operation processing of the oil motor simulation model 3, simultaneously outputs valve position analog quantity hard-wire interface signals obtained through simulation operation to a steam turbine control system simulator 7, and designs a communication port of the oil motor simulation device with the steam turbine control system simulator 7 for reading and writing CPU data in the oil motor simulation device.
Fifth embodiment: in this embodiment, the LVDT model 4 receives a simulation position p of the engine model output by the engine model 3, and outputs two secondary coil data of the LVDTA and two secondary coil data of the LVDTB to the interface management module 1 after calculation;
the method of two secondary coil output data acquisition for each LVDT is as follows:
step one, selecting a series of LVDTs to be used, and inputting 8V alternating current excitation voltage on a primary coil of the LVDT;
secondly, selecting stroke measuring points in the full stroke range of the LVDT in an average way, and using a universal meter to actually measure output voltage and stroke relation data of two groups of secondary coils of the series of LVDTs;
step three, inputting the actually measured two groups of secondary coil output voltage and travel relation data into an LVDT model 4 by using an interpolation method to fit into two secondary coil output voltage and travel relation curves;
step four, obtaining an actual measurement zero position p0 of the LVDT through the state command module 2;
and step five, adding p0 to the simulation position p of the oil motor model to serve as a simulation stroke output to the LVDT model 4, and outputting a corresponding voltage value by the LVDT model 4 according to the two secondary coil output voltage and stroke relation curves which are synthesized in the step three.
In this embodiment, the measured data of the coil voltage and stroke relationship of the LVDT are as follows:
specific embodiment six: the present embodiment is further limited to the oil motor simulation apparatus according to the fifth embodiment, and in the present embodiment, the communication mode of the communication module 5 is Modbus communication, CAN bus communication or Ethernet communication.
In this embodiment, the communication module 5 sends the status information in the status command module 2 to the communication interfaces 1 to 6 in the interface management module 1, and sends the commands obtained by the communication interfaces 1 to 6 in the interface management module 1 to the status command module 2; the communication module 5 is used for realizing Modbus communication, CAN bus communication or Ethernet communication.
Claims (4)
1. The simulation device of the oil motor is characterized by comprising an interface management module (1), a state command module (2), an oil motor model (3), an LVDT model (4) and a communication module (5);
the interface signal input and output end of the interface management module (1) is connected with the interface signal input and output end of the steam turbine control system (6); the analog signal input and output end of the interface management module (1) is connected with the analog signal input and output end of the steam turbine control system simulator (7);
the command signal input and output end of the interface management module (1) is connected with the command signal input and output end of the state command module (2); the communication signal input and output end of the interface management module (1) is connected with the communication signal input and output end of the communication module (5); the position signal input and output end of the interface management module (1) is connected with the position signal input and output end of the engine model (3); the operation signal input and output end of the interface management module (1) is connected with the operation signal input and output end of the LVDT model (4);
the state signal input and output end of the state command module (2) is connected with the state signal input and output end of the communication module (5);
the simulation signal output end of the oil motor model (3) is connected with the simulation signal input end of the LVDT model (4);
the interface management module (1) comprises a servo valve coil input interface (1-1), an analog output interface (1-2), a power interface (1-3), an LVDTA interface (1-4), an LVDTB interface (1-5) and a communication interface (1-6);
the servo valve coil input interface (1-1) is used for receiving two paths of servo valve coil driving signals of the oil motor output by a servo card of the steam turbine control system (6) and respectively sending the two paths of servo valve coil driving signals of the oil motor to the oil motor model (3) and the LVDT model (4);
the power interface (1-3) is used for connecting an externally provided power supply;
the LVDTA interfaces (1-4) and the LVDTB interfaces (1-5) are used for respectively receiving LVDT primary coil excitation signals provided by the steam turbine control system (6); after receiving the position simulation signals of the oil motor model (3), respectively outputting two secondary coil voltage signals of the two groups of LVDTs to a steam turbine control system (6);
the simulation output interface (1-2) is used for simulating and outputting the position simulation signal of the oil engine model (3) and sending the simulation position simulation signal to the steam turbine control system simulator (7)
The communication interface (1-6) is used for communicating with the steam turbine control system simulator (7);
the state command module (2) comprises a state information module and a command information module;
the state information module is used for simulating output fault information and acquiring input and output numerical information of the servo valve coil input interface (1-1), the LVDTA interface (1-4) and the LVDTB interface (1-5);
the command information module is used for sending a forbidden command for outputting signals of the LVDTA interface (1-4) and the LVDTB interface (1-5), sending a forbidden command for outputting an analog position simulation signal of the analog output interface (1-2), and sending zero-position instructions p0 related to the LVDTA interface (1-4) and the LVDTB interface (1-5);
the LVDT model (4) receives the simulation position p of the engine model output by the engine model (3), and outputs two secondary coil data of the LVDTA and two secondary coil data of the LVDTB to the interface management module (1) after operation.
2. A device according to claim 1, characterized in that the simulation signal output by the engine model (3) is implemented by a transfer function:
wherein p is the simulation position of the oil motor model (3); coilA is the signal of servo coil A; coilB is a signal of a servo coil B; servo valve gain of Ks; ts is the prime mover time constant; s is a complex variable.
3. A device according to claim 2, wherein the two secondary winding output data of each LVDT is obtained by the following method:
step one, selecting a series of LVDTs to be used, and inputting 8V alternating current excitation voltage on a primary coil of the LVDT;
secondly, selecting stroke measuring points in the full stroke range of the LVDT in an average way, and using a universal meter to actually measure output voltage and stroke relation data of two groups of secondary coils of the series of LVDTs;
step three, inputting the actually measured two groups of secondary coil output voltage and travel relation data into an LVDT model (4) by using an interpolation method to fit into two secondary coil output voltage and travel relation curves;
step four, obtaining an actual measurement zero position p0 of the LVDT through a state command module (2);
and step five, adding p0 to the simulation position p of the oil motor model to serve as a simulation stroke output to the LVDT model (4), and outputting a corresponding voltage value by the LVDT model (4) according to the relation curve of the output voltage and the stroke of the two secondary coils which are synthesized in the step three.
4. A device according to claim 3, characterized in that the communication means (5) is adapted to communicate by Modbus communication, CAN bus communication or Ethernet communication.
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| CN201910430450.7A CN110119591B (en) | 2019-05-22 | 2019-05-22 | Oil motor simulation device |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111927572B (en) * | 2020-06-18 | 2022-07-05 | 华电电力科学研究院有限公司 | System and method for measuring total closing time of steam turbine regulating valve |
| CN112540547B (en) * | 2020-11-13 | 2023-07-04 | 中广核核电运营有限公司 | Steam turbine valve simulation control system |
| CN112506036A (en) * | 2020-12-03 | 2021-03-16 | 杭州和利时自动化有限公司 | Servo control module and control method thereof |
| CN116243618A (en) * | 2022-12-19 | 2023-06-09 | 中国航天空气动力技术研究院 | A product test simulation system based on NIPXI equipment and FPGA board |
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