Harmonic suppression method and system for machine-side converter of disc-type contra-rotating permanent magnet hydroelectric generator and medium
A hydroelectric generator and harmonic suppression technology, applied in electrical components, output power conversion devices, etc., can solve the problems of increasing motor loss, affecting the life of the generator, and difficult double-rotor disc type counter-rotating permanent magnet generator efficiency.
Inactive Publication Date: 2021-05-18
HUNAN UNIV
View PDF6 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Due to the obvious difference in the structure of the dual-rotor disc counter-rotating permanent magnet generator and the traditional permanent magnet generator, it is difficult to effectively improve the efficiency of the dual-rotor disc counter-rotating permanent magnet generator by traditional methods
On the other hand, the special structure of the dual-rotor disc-type counter-rotating permanent magnet generator is applied to the PWM converter of the small and micro hydroelectric unit with low switching frequency and high harmonic content of input and output currents.
A large number of harmonics will increase the loss of the motor (mainly copper loss and iron loss) and torque ripple, thereby reducing the efficiency of the hydroelectric generator set and seriously affecting the life of the generator
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030]The present invention will be further described below in conjunction with the examples, but it should not be understood that the scope of the subject matter of the present invention is limited to the following examples. Without departing from the above idea of the present invention, various replacements and changes made according to common knowledge and conventional means in this field shall be included in the protection scope of the present invention.
[0031] Such as figure 1 As shown, the implementation steps of the harmonic suppression method for the machine-side converter of the disc-type counter-rotating permanent magnet hydroelectric generator in this embodiment include:
[0032] 1) Collect the stator current i of the disc counter-rotating permanent magnet synchronous motor abc Obtain d, q axis response current i d and i q ; Collect the rotor position angle θ 1 and θ 2 , select the rotor position angle θ 1 and θ 2 The rotor position angle θ that can run s...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a harmonic suppression method and system for a machine-side converter of a disc-type contra-rotating permanent magnet hydroelectric generator and a medium, and the method comprises the steps: respectively inputting a difference between a d-axis given current id * and a d-axis response current id, a difference between a q-axis given current iq * and a q-axis response current iq, and a rotating speed omega into a PI and a resonance controller; and obtaining d-axis given voltage ud * and q-axis given voltage uq *, generating a modulation switch signal, and inputting the modulation switch signal into a two-level converter of a machine-side converter to suppress harmonic waves of the machine-side converter. According to the invention, the machine side converter of the disc-type contra-rotating permanent magnet hydroelectric generator can suppress the current harmonic waves of the specified order, thereby eliminating the stator current harmonic waves, improving the output current waveform, preventing the harmonic waves from increasing the loss of the permanent magnet hydroelectric generator and the torque ripple, and effectively improving the efficiency of the hydroelectric generator. And the service life of the permanent magnet hydroelectric generator is prolonged.
Description
technical field [0001] The invention relates to a harmonic suppression technology of a machine-side converter of a hydroelectric generator, in particular to a harmonic suppression method, system and medium of a machine-side converter of a disc-type counter-rotating permanent magnet hydroelectric generator, which are used to realize a disc-to-disk Harmonic suppression for machine-side converter of counter-rotating permanent magnet hydroelectric generator. Background technique [0002] The power generation capacity of small and micro hydropower in rural areas in my country has reached 250 billion kWh, with large installed capacity and large reserves of green energy that can be developed and utilized. There are about 47,000 small and micro hydropower stations nationwide, requiring 130,000 units, and the output value will exceed 40 billion yuan. However, at present, the technology of small hydropower in rural areas of our country is backward, and the power generation efficiency...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/12
CPCH02M1/12
Inventor 崔鹤松谢金平黄守道罗德荣黄凤琴张晓飞吴公平龙卓
Owner HUNAN UNIV