Device and method for restraining shaft torsional vibration of compressed air energy storage system
A technology of compressed air energy storage and shaft torsional vibration, which is applied in control systems, electrical components, and control generators. It can solve the fatigue of generators and air turbine shafts, reduce the fatigue life of large shafts, and twist large shafts. and other problems, to solve the torsional vibration problem of the shaft system, reduce additional investment costs, and improve safety
Active Publication Date: 2019-07-26
TSINGHUA UNIV +3
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Problems solved by technology
This torsional stress will cause fatigue or damage to the shafting of the generator and air turbine, reduce the fatigue life of the large shaft, and even twist the large shaft in severe cases
Method used
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[0031]Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0032] The device and method for suppressing the torsional vibration of the shaft system of the compressed air energy storage system according to the embodiments of the present invention will be described below with reference to the accompanying drawings. suppression device.
[0033] figure 1 It is a structural schematic diagram of a device for suppressing torsional vibration of a compressed air energy storage system shaft system according to an embodiment of the present invention.
[0034] Such as figure 1 As shown, the compre...
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The invention discloses a suppression device and method for shaft system torsional vibration of a compressed air energy storage system. The device comprises an additional excitation damping controllerwhich is used for taking a low pressure cylinder rotate speed signal of a combined air turbo expander as a feedback signal; a generator terminal subsynchronous damping controller which is used for generating a compensation current reference value by taking the low pressure cylinder rotate speed signal of the combined air turbo expander as the feedback signal; and a coordinator which is used for controlling the additional excitation damping controller and the generator terminal subsynchronous damping controller to carry out coordinative work, thereby jointly realizing the purpose of suppressing the shaft system torsional vibration of the compressed air energy storage system. According to the device, variable working condition can be realized through adoption of a flexible shaft system of the combined air turbo expander with a plurality of clutches, the purpose of suppressing the shaft system torsional vibration of the compressed air energy storage system can be realized, the shaft system torsional vibration problem possibly occurring in grid-connected operation of the compressed air energy storage system can be effectively solved, and the grid-connected operation security of the compressed air energy storage system can be effectively improved.
Description
technical field [0001] The invention relates to the technical field of compressed air energy storage, in particular to a device and method for suppressing torsional vibration of a shaft system of a compressed air energy storage system. Background technique [0002] At present, the CAES (Compressed Air Energy Storage, compressed air energy storage) system has the advantages of large energy storage capacity, long service life, and fast response speed. An important means to transform the energy structure cleanly and promote the innovation of smart grid technology. [0003] The energy release process of the compressed air energy storage system includes heat transfer, gas release, expansion power generation, and grid connection. It involves dynamic processes of multiple time scales such as thermal, pneumatic, mechanical transmission, and electric, and the energy conversion process is complex. Due to the good compressibility of the working medium (air), the power regulation respo...
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IPC IPC(8): H02J3/24H02J3/28H02J3/38H02P9/06H02P9/10
CPCH02J3/24H02J3/28H02J3/38H02P9/06H02P9/102
Inventor 梅生伟陈来军卢强薛小代
Owner TSINGHUA UNIV