CN112130073A - High-speed generator starting power generation performance test system for closed cycle power generation system - Google Patents
High-speed generator starting power generation performance test system for closed cycle power generation system Download PDFInfo
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- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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Abstract
The invention relates to a power generation performance test system of a high-speed starter generator for a closed cycle power generation system, and belongs to the technical field of closed cycle power generation/turbine power generation. The invention designs a system and a method for testing the power generation performance of a high-speed starting generator for a closed cycle power generation system.
Description
Technical Field
The invention belongs to the technical field of closed cycle power generation/turbine power generation, and particularly relates to a power generation performance test system of a high-speed starter for a closed cycle power generation system.
Background
The closed cycle power generation system is a special turbine power generation technology with working media repeatedly participating in cycle power generation, only energy exchange is carried out with the outside, and no substance exchange is carried out, so that the closed cycle power generation system can be applied to special environment conditions without air, such as deep space, deep sea and the like, and is a new direction for the development of small turbine power.
In the closed cycle power generation system, a high-temperature working medium at the front end of a turbine engine pushes a turbine to do work, heat energy is converted into mechanical energy, and then the turbine drives a generator connected with the rear end to rotate at a high speed, so that the mechanical energy is converted into required electric energy.
The high-speed starting generator has the double functions of electromotion and power generation, the starting generator runs in an electromotion state at the starting stage of the engine and drags the turbine rotor to a working rotating speed, and the starting generator automatically shifts to the power generation state to run after the engine enters an acting state, so that the mechanical energy of the turbine is converted into electric energy to be output.
The high-speed motor has the advantages of high power density, high efficiency and the like, but the testing of the power generation performance of the motor is difficult, the traditional testing method is to test the towing test bed through the motor, and the testing scheme is shown in fig. 2. The testing method has high requirements on the motor drag test bed, the connection and measurement between the tested motor and the drag motor have extremely high coaxiality requirements and other process problems, most of the testing schemes can only test the linear power generation performance of the tested motor, cannot cover the whole working condition range of the motor, and can not verify the performance of the tested motor in the combined working with driving equipment such as a generator controller and the like, and the testing coverage of parts is not complete.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: how to design a system and a method for testing the power generation performance of a high-speed starter generator for a closed cycle power generation system.
(II) technical scheme
In order to solve the technical problem, the invention provides a power generation performance test system of a high-speed starting generator for a closed cycle power generation system, which is used for completing the full-working-condition coverage test of the power generation performance of the high-speed starting generator in the closed cycle power generation system.
Preferably, the device comprises a high-pressure air source, a rotor platform, a generator to be tested, a measuring device and a drive control system;
the high-pressure air source is used for providing high-energy compressed air, the energy input is adjusted by adjusting the air flow and pressure, and the turbine rotor and the air compressor are blown and rotated to a high-speed state, so that the rotor platform generates shaft work to drive the power generation system to generate power;
the rotor platform is used for converting the energy of the front-end high-pressure air source into mechanical energy for the high-speed rotation of the turbine rotor;
the measuring device is used for measuring signals of output voltage, current, temperature and vibration of the generator to be measured;
the tested starting generator is a starting generator participating in the power generation performance test;
the drive control system is used for driving the tested generator to realize bidirectional conversion between the variable-voltage variable-frequency electric energy of the tested generator and the constant-voltage constant-frequency electric energy of the power grid;
the generator to be tested and the drive control system form a power generation system.
Preferably, the rotor platform comprises a turbine rotor and a gas compressor, wherein the gas compressor is respectively coaxially connected with the turbine rotor and the generator to be tested and is used for generating shaft work under the driving of a high-pressure gas source and driving the power generation system to generate power.
Preferably, the drive control system comprises a motor controller and an inverter, the motor controller is connected with the inverter through a direct current bus, the motor controller is used for realizing bidirectional conversion between variable voltage variable frequency alternating current and direct current of the motor, and the inverter is used for realizing bidirectional conversion between the direct current bus and constant voltage constant frequency alternating current on the power grid side.
Preferably, the components of the power generation system are interconnected through cables.
Preferably, the rotor platform is designed according to an engine rotor system under the actual use environment of the tested generator.
Preferably, the high pressure gas source is a fixed installation.
The invention also provides a method for testing the power generation performance of the high-speed starting power generation system for the closed cycle power generation system, which is realized by utilizing the system and comprises the following steps:
step 2, at the time of t0, opening the high-pressure air source, gradually increasing the output flow and pressure of the high-pressure air source, and gradually reducing the dragging energy required by the generator to be tested till the power generation operation, wherein the electric energy absorbed by the driving control system from the power grid is gradually reduced and finally changed into the power generation operation;
step 3, at the time of t1, the starting power generation system reaches a rated working point at the rotating speed, the output capacity of the high-pressure air source is P1, and at the time of t2, the power-taking control system is operated to adjust the rotating speed of the detected starting power generator to a next set point n 2;
step 4, at the time of t3, continuously increasing the output of the high-pressure air source until the power generation system reaches the rated working point at the rotating speed from the time of t4, wherein the output capacity of the high-pressure air source is P2;
step 5, repeating the step 3 and the step 4 until the power generation performance test of all the working points of the tested generator is completed;
step 6, when the test system is shut down, the output of the high-pressure air source is gradually reduced to P (n-1), the time is set as t15, then the set rotating speed is reduced to n (n-1) at the time of t16, the output of the high-pressure air source is gradually reduced at the subsequent time of t17, and the reduction of the output of the high-pressure air source and the control of the speed reduction of the tested generator are sequentially and alternately carried out according to the preset working time and the set rule after a period of time;
and 7, at the subsequent time t25, the power generation system is reduced to the minimum set rotating speed n1, then the air source is gradually reduced at the time t26 until the high-pressure air source is closed at the time t27, then the drive control system controls the detected generator to stop at the time t28, and the drive control system is powered off.
The invention also provides application of the system in the fields of closed cycle power generation technology and turbine power generation.
(III) advantageous effects
The invention designs a system and a method for testing the power generation performance of a high-speed starting generator for a closed cycle power generation system.
Drawings
FIG. 1 is a power generation working schematic diagram of a closed cycle power generation system;
FIG. 2 is a block diagram of a conventional system for testing the power generation performance of a high-speed starter generator;
FIG. 3 is a block diagram of a test system according to the present invention;
FIG. 4 is a timing diagram of the operation of the test scheme of the present invention.
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
The invention provides a power generation performance testing system of a high-speed starting generator for a closed cycle power generation system, which is applied to the fields of closed cycle power generation technology and turbine power generation and is used for completing the full-working-condition coverage test of the power generation performance of the high-speed starting generator in the closed cycle power generation system.
The system comprises a high-pressure air source, a rotor platform (comprising a turbine rotor, a gas compressor and the like), a generator to be tested, a measuring device, a drive control system (comprising a motor controller and an inverter), related cables and the like, wherein the components of the system are shown in figure 3.
In the system, the power generation energy source of the generator is a high-pressure gas source, and the high-pressure gas source realizes the adjustment of energy input by adjusting the gas flow and the pressure. The high-pressure air source is used for providing high-energy compressed air, blowing and rotating the turbine rotor and the air compressor to a high-speed state, and replacing a high-temperature working medium in the closed cycle power generation system, so that the test conditions are simplified, the test efficiency is improved, the rotor platform generates shaft work, and the power generation system is driven to generate power;
a rotor platform: the energy of the front-end high-pressure air source is converted into mechanical energy of the turbine rotor rotating at a high speed, the mechanical energy is transmitted to the coaxially-mounted starting generator which is a medium for energy transmission and conversion, and the air compressor is coaxially connected with the turbine rotor and the detected starting generator respectively and is used for generating shaft work under the driving of the high-pressure air source to drive the starting power generation system to generate power; the rotor platform is designed according to an engine rotor system in the actual use environment of the generator, so that the real working condition can be simulated to the maximum extent.
A measuring device: the device is used for measuring signals such as output voltage, current, temperature, vibration and the like of the generator to be measured;
the generator is tested: the generator is a generator participating in the power generation performance test;
a drive control system: the system is used for driving a generator to be tested and realizing bidirectional conversion between variable-voltage variable-frequency electric energy of the generator to be tested and constant-voltage constant-frequency electric energy of a power grid, and comprises a motor controller and an inverter, wherein the motor controller is connected with the inverter through a direct-current bus; it can be seen that the drive control system has bidirectional conversion capability, and can realize both the electric operation and the power generation operation of the generator.
Related cables: and realizing interconnection among all the components of the power generation system.
The generator to be tested and the drive control system form a power generation system.
Except that the high-pressure air source is a fixed facility, other components can be flexibly transported, placed and assembled. The interfaces among the generator, the motor controller and the inverter all adopt quick plugging connectors, so that the generator, the motor controller and the inverter can be quickly and reliably connected.
The invention provides a method for testing the power generation performance of a high-speed starting power generation system for a closed cycle power generation system, which is realized by utilizing the system.
The method comprises the following steps:
step 2, at the time of t0, opening the high-pressure air source, gradually increasing the output flow and pressure of the high-pressure air source, and at the moment, gradually reducing the dragging energy required by the generator to be measured until the power generation operation, so that the electric energy absorbed by the driving control system from the power grid is gradually reduced and finally changed into the power generation operation;
step 3, at the time of t1, the starting power generation system reaches a rated working point (the output capacity of the high-pressure air source is P1) at the rotating speed, and at the time of t2, the power-taking control system is operated to adjust the rotating speed of the detected starting power generator to a next set point n 2;
step 4, at the time of t3, continuously increasing the output of the high-pressure air source until the power generation system reaches the rated working point at the rotating speed at the time of t4 (at the moment, the output capacity of the high-pressure air source is P2);
step 5, repeating the step 3 and the step 4 until the power generation performance test of all the working points of the tested generator is completed;
and 6, when the test system is stopped, gradually reducing the output of the high-pressure air source to P (n-1) (assuming that the time is t15), then reducing the set rotating speed to n (n-1) at the time of t16, gradually reducing the output of the high-pressure air source at the time of t17, and after a period of time, sequentially and alternately reducing the output of the high-pressure air source and controlling the speed reduction of the tested generator according to the set working time and the set rule set in the figure 4, so that the air pressure, the temperature and the energy in the rotor system are changed relatively uniformly, and the equipment is ensured to work within a controllable range. Compared with the traditional generator starting test platform and the traditional generator starting test method, the test system and the control time sequence are close to the actual working time sequence of the closed cycle power generation system, so that the generator starting power generation performance test can be realized, and partial support can be provided for the system power generation performance analysis.
And 7, at the time of t25, the power generation system is reduced to the minimum set rotating speed n1, the air source is gradually reduced at the time of t26 until the high-pressure air source is closed at the time of t27, and then the drive control system controls the tested generator to stop at the time of t28, and the drive control system is powered off.
The whole working process is shown in figure 4. In fig. 4, the abscissa represents the execution time, and the ordinate represents the rotation speed and the output capacity of the high-pressure air source.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a closed cycle power generation system is with high-speed generator electricity generation performance test system that starts, its characterized in that, this system is arranged in accomplishing closed cycle power generation system, and the full operating mode coverage of high-speed generator electricity generation performance is tested.
2. The system of claim 1, comprising a high pressure gas source, a rotor platform, a generator under test, a measurement device, a drive control system;
the high-pressure air source is used for providing high-energy compressed air, the energy input is adjusted by adjusting the air flow and pressure, and the turbine rotor and the air compressor are blown and rotated to a high-speed state, so that the rotor platform generates shaft work to drive the power generation system to generate power;
the rotor platform is used for converting the energy of the front-end high-pressure air source into mechanical energy for the high-speed rotation of the turbine rotor;
the measuring device is used for measuring the output signal of the generator to be measured;
the tested starting generator is a starting generator participating in the power generation performance test;
the drive control system is used for driving the tested generator to realize bidirectional conversion between the variable-voltage variable-frequency electric energy of the tested generator and the constant-voltage constant-frequency electric energy of the power grid;
the generator to be tested and the drive control system form a power generation system.
3. The system of claim 2, wherein the rotor platform comprises a turbine rotor and a compressor, wherein the compressor is coaxially connected with the turbine rotor and the generator to be tested respectively and is used for generating shaft work under the driving of the high-pressure air source to drive the power generation system to generate power.
4. The system of claim 3, wherein the drive control system comprises a motor controller and an inverter, the motor controller is connected with the inverter through a direct current bus, the motor controller is used for realizing the bidirectional conversion between the variable voltage variable frequency alternating current and the direct current of the motor, and the inverter is used for realizing the bidirectional conversion between the direct current bus and the constant voltage and constant frequency alternating current on the power grid side.
5. The system of any one of claims 2 to 4, wherein the components of the power generation system are interconnected by cables.
6. The system of any one of claims 2 to 4, wherein the rotor platform is designed in accordance with the engine rotor system under the actual environment in which the generator is to be tested.
7. The system of any one of claims 2 to 4, wherein the high pressure gas source is a stationary facility.
8. A method for testing the power generation performance of a high-speed starting power generation system for a closed cycle power generation system, which is implemented by using the system of any one of claims 4 to 7, and is characterized by comprising the following steps:
step 1, during initial work, a high-pressure air source is in a closed state, a power generation system is powered on, a drive control system initially runs in an electric state, an inverter takes power from a power grid to establish direct-current voltage in the electric state, a motor controller takes power from a direct-current bus, and drags a tested generator to be driven to a set rotating speed n1 together with an engine; the engine comprises a turbine rotor and a compressor;
step 2, at the time of t0, opening the high-pressure air source, gradually increasing the output flow and pressure of the high-pressure air source, and gradually reducing the dragging energy required by the generator to be tested till the power generation operation, wherein the electric energy absorbed by the driving control system from the power grid is gradually reduced and finally changed into the power generation operation;
step 3, at the time of t1, the starting power generation system reaches a rated working point at the rotating speed, the output capacity of the high-pressure air source is P1, and at the time of t2, the power-taking control system is operated to adjust the rotating speed of the detected starting power generator to a next set point n 2;
step 4, at the time of t3, continuously increasing the output of the high-pressure air source until the power generation system reaches the rated working point at the rotating speed from the time of t4, wherein the output capacity of the high-pressure air source is P2;
step 5, repeating the step 3 and the step 4 until the power generation performance test of all the working points of the tested generator is completed;
step 6, when the test system is shut down, the output of the high-pressure air source is gradually reduced to P (n-1), the time is set as t15, then the set rotating speed is reduced to n (n-1) at the time of t16, the output of the high-pressure air source is gradually reduced at the subsequent time of t17, and the reduction of the output of the high-pressure air source and the control of the speed reduction of the tested generator are sequentially and alternately carried out according to the preset working time and the set rule after a period of time;
and 7, at the subsequent time t25, the power generation system is reduced to the minimum set rotating speed n1, then the air source is gradually reduced at the time t26 until the high-pressure air source is closed at the time t27, then the drive control system controls the detected generator to stop at the time t28, and the drive control system is powered off.
9. The method of claim 8, wherein the signals of generator output voltage, current, temperature, vibration are measured.
10. Use of a system according to any one of claims 4 to 7 in the fields of closed cycle power generation and turbine power generation.
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