CN102436182A - Semi-physical simulation device and simulation method of ship gas turbine generator set - Google Patents

Abstract

The invention discloses a semi-physical simulation device and a simulation method of a ship gas turbine generator set, relating to a simulation device and a simulation method of a ship gas turbine generator set. It solves the problems of low simulation accuracy and high risk in the test process of the existing gas turbine generating set. The invention aims at the simulation requirement of the marine gas turbine generating set, and adds some physical entity devices on the basis of the traditional computer digital simulation, so that the simulation system is closer to the actual machine operation status. Simultaneously, by using the present invention to simulate the marine gas turbine generating set, the amount of real machine test debugging can be greatly reduced, and tests that cannot be carried out under the real machine state can be carried out, thereby saving test costs and increasing test safety. The invention is suitable for the semi-physical simulation of the marine gas turbine generating set.

Description

Semi-physical simulation device and simulation method for marine gas turbine generator set

technical field

The invention relates to a simulation device and a simulation method of a marine gas turbine generating set.

Background technique

The gas turbine generator set is the core device of ship comprehensive electric propulsion. Mastering the dynamic operation characteristics of the unit is the key to design and develop a unit control system with reliable performance and stable operation. Although the traditional computer digital simulation is flexible in configuration, it makes many assumptions about the actual device and operating conditions, and it is difficult to guarantee the accuracy; and the cost of the full physical test bench is very high, and there are many risks in the test process.

Contents of the invention

The invention aims to solve the problems of low simulation accuracy and high risk in the test process of the existing gas turbine generator set, thereby providing a semi-physical simulation device and simulation method of the ship gas turbine generator set.

The semi-physical simulation device of the ship gas turbine generating set, which includes the ship gas turbine simulator and the physical device entity; the physical device entity includes the motor drive controller, the motor, the speed torque meter and the generator, and the motor drive controller outputs the drive signal to the motor; the motor drive controller The output shaft is connected to the input shaft of the generator through a coupling, and the speed torque meter is used to collect the speed signal and torque signal of the output shaft of the motor;

The ship gas turbine simulator includes a ship gas turbine simulation model, a data output board and a data acquisition card. The torque data output end of the data output board is connected to the torque setting data input end of the motor drive controller; the motor speed signal input of the data acquisition card connected to the speed signal output end of the speed torque meter; the generator load torque signal input end of the data acquisition card is connected to the torque signal output end of the speed torque meter; the torque signal output end of the speed torque meter is also connected to the torque signal of the motor drive controller Data input terminal connection; the speed signal output terminal of the speed torque meter is also connected to the speed data input end of the motor drive controller; the ship gas turbine simulation model is used to output the power turbine torque value to the data output board, and is also used to receive the data acquisition card Collected motor speed values and generator load torque data.

The semi-physical simulation method of marine gas turbine generator set based on the above-mentioned device, it is realized by the following steps:

Step 1, the governor model 211 controls the fuel injection quantity of the combustion chamber in the gas generator 212 according to the input speed loop deviation, and then controls the power turbine torque data output by the power turbine model 213; the speed loop deviation is based on the set The value obtained by making a difference between the fixed gas turbine power turbine speed data and the motor speed value input by the data acquisition card 23;

Step 2, converting the power turbine torque data output by the power turbine model 213 described in step 1 into a current setting value for motor constant torque control, and outputting it to the motor drive controller 31;

Step 3, the motor drive controller 31 outputs a control signal to the motor 32 according to the input current loop deviation, thereby controlling the motor 32 to run in a constant torque mode and driving the generator 34 to generate electricity; the current loop deviation is set according to the current The value obtained by making a difference with the generator load torque value input by the speed torque meter 33;

Step 4: The speed torque meter 33 collects the speed value of the motor 32 and the load torque value of the generator 34, and sends them to the ship gas turbine simulation model 21 through the data acquisition card 23, thereby realizing the semi-physical closed-loop simulation of the ship gas turbine generator set.

Beneficial effects: the present invention aims at the simulation requirements of the marine gas turbine generating set, and on the basis of traditional computer digital simulation, some physical entity devices are added to make the simulation system closer to the actual machine operating conditions, and the simulation accuracy is high; at the same time, the present invention is used for Simulation of marine gas turbine generator sets can greatly reduce the amount of real machine test debugging, and can carry out tests that cannot be carried out under the real machine state, thereby greatly improving the safety of the test.

Description of drawings

Fig. 1 is a schematic structural diagram of the device of the present invention; Fig. 2 is a schematic diagram of the semi-physical simulation operation control principle of the device of the present invention; Fig. 3 is a schematic flow chart of the method of the present invention.

Detailed ways

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One, illustrate this embodiment in conjunction with Fig. 1, ship gas turbine generating set semi-physical simulation device, it comprises ship gas turbine simulator 2 and physical device entity 3; Physical device entity 3 comprises motor drive controller 31, motor 32, Speed torque meter 33 and generator 34, motor drive controller 31 output driving signal to motor 32; Shaft speed signal and torque signal;

Ship gas turbine simulator 2 includes ship gas turbine simulation model 21, data output board 22 and data acquisition card 23, and the torque data output end of data output board 22 is connected with the torque setting data input end of motor drive controller 31; The motor speed signal input end of the card 23 is connected with the speed signal output end of the speed torque meter 33; the generator load torque signal input end of the data acquisition card 23 is connected with the torque signal output end of the speed torque meter 33; the torque of the speed torque meter 33 The signal output end is also connected with the torque data input end of the motor drive controller 31; the speed signal output end of the speed torque meter 33 is also connected with the speed data input end of the motor drive controller 31; the ship gas turbine simulation model 21 is used to output power turbine The torque value is sent to the data output board 22, and is also used to receive the motor speed value and generator load torque data collected by the data acquisition card 23.

The semi-physical simulation structure of the marine gas turbine generator set is shown in Fig. 1. The marine gas turbine runs on the simulator in the form of a simulation model, and the power generation device and load run as physical entities, and the two are connected by an electric motor. During the simulation operation, the simulator transmits the real-time signal of the output torque of the gas turbine power turbine to the motor drive controller through the data output board. The load torque of the generator is transmitted to the simulation machine in the form of digital quantity through the speed torque meter and the data acquisition card, thus forming a simulation closed loop. Using the same scaling method, the speed of the physical entity motor rotor and the gas turbine power turbine rotor in the simulation model are close to the same.

The invention aims at the simulation requirement of the marine gas turbine generating set, and adds some physical entity devices on the basis of the traditional computer digital simulation, so that the simulation system is closer to the actual machine operation status. Using the invention to simulate the marine gas turbine generating set can greatly reduce the amount of real machine test debugging, and can perform tests that cannot be carried out under the real machine state, thereby saving test costs and increasing test safety. Put the constant torque control loop of the electric motor into the digital simulation loop of the marine gas turbine, and under the premise of the same scaling, the speed of the motor rotor and the gas turbine power turbine rotor are close to the same, thus solving the problem of the relationship between the gas turbine digital simulation model and the power generation Connection issues with the physical entity of the device and load.

Embodiment 2. The difference between this embodiment and the semi-physical simulation device of the ship gas turbine generating set described in Embodiment 1 is that the ship gas turbine simulation model 21 includes a governor model 211, a gas generator model 212 and a power turbine model. 213, the governor model 211 controls the combustion chamber fuel injection quantity in the gas generator 212 according to the input speed loop deviation; the gas generator model 212 is used to provide gas characteristic data to the power turbine model 213; the power turbine model 213 Used to output power turbine torque data.

Specific Embodiment 3. The difference between this specific embodiment and the semi-physical simulation device for marine gas turbine generator set described in specific embodiment 1 or 2 is that it also includes a host computer 1,

Described upper computer 1 comprises user simulation parameter input unit 12, simulation model establishment unit 14 and TCP/IP data bus interface unit 15, and described user simulation parameter input unit 12 is used for receiving the simulation parameter of user input, as simulation algorithm, simulation total time etc., and the simulation parameters are input to the ship gas turbine simulation model 21 through the TCP/IP data bus interface unit 15; Ship gas turbine simulation model downloaded from Ship Gas Turbine Simulator 2.

Embodiment 4. The difference between this embodiment and the semi-physical simulation device for marine gas turbine generator set described in Embodiment 3 is that the host computer 1 also includes a simulation process monitoring unit 13,

The simulation process monitoring unit 13 is used to obtain the operating parameters of the motor drive controller 31 through the TCP/IP data bus interface unit 15 during the simulation process, such as driver output current, operating temperature, etc.; The command input by the user can suspend or resume the operation of the motor drive controller 31 and the ship gas turbine simulation model 21 through the TCP/IP data bus interface unit 15 at any time, thereby controlling the operation of the semi-physical simulation device.

Embodiment 5. The difference between this embodiment and the semi-physical simulation device of the marine gas turbine generating set described in Embodiment 4 is that the upper computer 1 also includes a simulation data display unit 11, and the simulation data display unit 11 is used to display The simulation results of the ship gas turbine simulation model 21 uploaded through the TCP/IP data bus interface unit 15.

In this embodiment, the operation of the semi-physical simulation system is carried out under the control of the host computer. Through the TCP/IP data bus, the host computer downloads the simulation model and simulation parameters to the simulator and the motor drive controller, and monitors the simulation The whole process; the simulator uploads the data generated during the simulation process to the host computer for users to view the simulation results.

Work process of the present invention can be carried out by flow process shown in Figure 3. First, design the simulation scheme on the host computer, download the simulation model and simulation parameters to the simulator and the motor drive controller; adjust the load to the initial state and start the motor, and start the semi-physical simulation on the host computer when the motor reaches a stable state ;During the simulation process, the load can be adjusted according to the simulation scheme, and the simulation results can be observed on the host computer; after the preset simulation time expires, a shutdown command is sent to the motor drive controller, and the simulation ends.

Specific embodiment six, based on the semi-physical simulation method of the ship gas turbine generating set of specific embodiment one, it is realized by the following steps:

Step 1, the governor model 211 controls the fuel injection quantity of the combustion chamber in the gas generator 212 according to the input speed loop deviation, and then controls the power turbine torque data output by the power turbine model 213; the speed loop deviation is based on the set The value obtained by making a difference between the fixed gas turbine power turbine speed data and the motor speed value input by the data acquisition card 23;

Step 2, converting the power turbine torque data output by the power turbine model 213 described in step 1 into a current setting value for motor constant torque control, and outputting it to the motor drive controller 31;

Step 3, the motor drive controller 31 outputs a control signal to the motor 32 according to the input current loop deviation, thereby controlling the motor 32 to run in a constant torque mode and driving the generator 34 to generate electricity; the current loop deviation is set according to the current The value obtained by making a difference with the generator load torque value input by the speed torque meter 33;

Step 4: The speed torque meter 33 collects the speed value of the motor 32 and the load torque value of the generator 34, and sends them to the ship gas turbine simulation model 21 through the data acquisition card 23, thereby realizing the semi-physical closed-loop simulation of the ship gas turbine generator set.

As shown in Figure 2 is the simulation operation control scheme of this method. The outer loop is the gas turbine power turbine speed control loop in the simulation model, and the gas turbine governor controls the fuel injection quantity G _f of the combustion chamber according to the speed loop deviation (Δn=n _s -n), so that the power turbine output torque change; the torque value is reduced by a certain ratio to form the current setting value I _s of the constant torque control of the motor. Under the control of the constant torque loop, the motor is stable by adjusting the duty cycle α of the power supply end; The load torque M _l is proportionally amplified and then uploaded to the gas turbine model for the calculation of the power turbine characteristics, while the speed n is used as the speed feedback value of the gas turbine power turbine speed control loop.

In this method, the gas turbine power turbine rotor moment of inertia J _pt and output torque M _pt in the simulation model, the physical entity motor rotor moment of inertia J _m , output torque M _m , and the load torque M _lm in the simulation model are related to the physical entity generator The resulting load torque M _l satisfies:

$\frac{{\mathrm{<span\; class="notranslate">\; J</span>}}_{\mathrm{<span\; class="notranslate">\; pt</span>}}}{{\mathrm{<span\; class="notranslate">\; J</span>}}_{\mathrm{<span\; class="notranslate">\; m</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; pt</span>}}}{{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; m</span>}}}<span\; class="notranslate">\; =</span>\frac{{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; lm</span>}}}{{\mathrm{<span\; class="notranslate">\; m</span>}}_{\mathrm{<span\; class="notranslate">\; l</span>}}}<span\; class="notranslate">\; =</span><span\; class="notranslate">\; \&PartialD;</span><span\; class="notranslate">\; .</span>$

Claims (6)

1. boats and ships gas-turbine generator set semi-physical simulation device, it is characterized in that: it comprises boats and ships gas turbine replicating machine (2) and physical unit entity (3); Physical unit entity (3) comprises motor drive controller (31), motor (32), rotating speed torque gauge (33) and generator (34), and motor drive controller (31) output drive signal is given motor (32); The output shaft of motor (32) is connected with the input shaft of generator (34) through shaft coupling (35), and rotating speed torque gauge (33) is used to gather the tach signal and the torque signal of motor (32) output shaft;

Boats and ships gas turbine replicating machine (2) comprises boats and ships gas turbine realistic model (21), data output integrated circuit board (22) and data collecting card (23), and the moment of torsion data output end of data output integrated circuit boards (22) is connected with the torque setting data input pin of motor drive controller (31); The motor speed signal input part of data collecting card (23) is connected with the tach signal output terminal of rotating speed torque gauge (33); The generator loading torque signal input end of data collecting card (23) is connected with the torque signal output terminal of rotating speed torque gauge (33); The torque signal output terminal of rotating speed torque gauge (33) also is connected with the moment of torsion data input pin of motor drive controller (31); The tach signal output terminal of rotating speed torque gauge (33) also is connected with the rotary speed data input end of motor drive controller (31); Boats and ships gas turbine realistic model (21) is used for outputting power turbine torque value and exports integrated circuit board (22) to data, also is used to receive motor speed value and the generator loading moment of torsion data that data collecting card (23) is gathered.

2. boats and ships gas-turbine generator set semi-physical simulation device according to claim 1; It is characterized in that boats and ships gas turbine realistic model (21) comprises speed regulator model (211), gas generator model (212) and power turbine model (213), said speed regulator model (211) is according to the distributive value of firing chamber in the speed ring departure control gas generator (212) of input; Gas generator model (212) is used for the combustion gas performance data to power turbine model (213) being provided; Power turbine model (213) is used for outputting power turbine moment of torsion data.

3. boats and ships gas-turbine generator set semi-physical simulation device according to claim 2; It is characterized in that it also comprises host computer (1); Said host computer (1) comprises that subscriber simulation parameter input unit (12), realistic model set up unit (14) and TCP/IP data bus interface unit (15); Said subscriber simulation parameter input unit (12) is used to receive the simulation parameter of user's input, and said simulation parameter is inputed to boats and ships gas turbine realistic model (21) through TCP/IP data bus interface unit (15); Realistic model is set up unit (14) and to the user Ship Power Equipment modular model library is provided, and is convenient to the user and sets up the boats and ships gas turbine realistic model that supplies boats and ships gas turbine replicating machines (2) to download by simulating scheme.

4. boats and ships gas-turbine generator set semi-physical simulation device according to claim 3; It is characterized in that host computer (1) also comprises simulation process monitoring unit (13); Simulation process monitoring unit (13) is used for obtaining through TCP/IP data bus interface unit (15) at simulation process the operational factor of motor drive controller (31); Said simulation process monitoring unit (13) also is used for suspending or recovering through TCP/IP data bus interface unit (15) at any time according to the order of user's input the operation of motor drive controller (31) and boats and ships gas turbine realistic model (21), thus the operation of control semi-physical simulation device.

5. boats and ships gas-turbine generator set semi-physical simulation device according to claim 4; It is characterized in that host computer (1) also comprises emulated data display unit (11), said emulated data display unit (11) is used for showing the simulation result of the boats and ships gas turbine realistic model of uploading through TCP/IP data bus interface unit (15) (21).

6. based on the boats and ships gas-turbine generator set semi-physical simulation method of claim 1, it is characterized in that: it is realized by following steps:

Step 1, speed regulator model (211) are controlled the distributive value of firing chamber in the gas generator (212) according to the speed ring departure of input, and then control the power turbine moment of torsion data of power turbine model (213) output; Said speed ring departure is to do the value that difference obtains according to the motor speed value of Gas Turbine Power secondary speed data of setting and data collecting card (23) input;

Step 2, the power turbine moment of torsion data-switching that the described power turbine model of step 1 (213) is exported become the current setting value of the permanent moment of torsion control of motor, and export to motor driving controller (31);

Step 3, motor driving controller (31) are given motor (32) according to the electric current loop departure output control signal of input, thereby control motor (32) moves with permanent moment of torsion mode, and drive generator (34) generating; Said electric current loop departure is to do the value that difference obtains according to the generator loading torque value of current setting value and rotating speed torque gauge (33) input;

Step 4, rotating speed torque gauge (33) are gathered the tachometer value of motor (32) and the load torque value of generator (34); And send to boats and ships gas turbine realistic model (21), thereby realize boats and ships gas-turbine generator set semi physical closed-loop simulation through data collecting card (23).

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