A compressed air energy storage power generation system and its phase modulation control method
A technology for compressed air energy storage and power generation systems, applied in the field of power systems, can solve the problems of small generator capacity, weak reactive power support, and high power loss, and achieve the effects of reducing operating costs, reducing usage, and improving stability.
Active Publication Date: 2021-02-09
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology
Due to the large workload of operation and maintenance and high power consumption, the annual operating cost of synchronous condensers is relatively high
[0004] In addition, the capacity of the generator in the traditional compressed air energy storage power generation system is small, and it cannot generate a large amount of active and reactive power at the same time, and the ability to provide reactive power support to the grid is weak.
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[0037] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0038] According to the first aspect of the present invention, a compressed air energy storage power generation system is provided, such as figure 1 As shown, including: compressed air energy storage device, generator, fully controlled excitation device and control circuit;
[0039] The machine end of the generator is connected to the power grid, the compressed air energy storage device is conn...
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The invention discloses a compressed air energy storage power generation system and a phase modulation control method thereof. The system includes: a compressed air energy storage device, a generator, a full-control excitation device and a control circuit; The energy storage device is connected to the rotor of the generator, the fully-controlled excitation device is connected to the excitation winding of the generator, the fully-controlled excitation device is also connected to the machine end of the generator, and the control circuit is respectively connected to each fully-controlled device of the fully-controlled excitation device. The control circuit is also connected with the compressed air energy storage device and the machine terminal of the generator; the control circuit is used to obtain switch signals and control signals; the compressed air energy storage device is used to adjust the speed of the turbine or disconnect the connection with the rotor; The excitation control device is used to directly absorb or inject reactive power to the grid, and adjust the excitation current of the generator to indirectly absorb or inject reactive power to the grid. The invention can improve the ability of providing reactive power support to the grid and reduce the operating cost of the grid.
Description
technical field [0001] The invention belongs to the field of power systems, and more specifically relates to a compressed air energy storage power generation system and a phase modulation control method thereof. Background technique [0002] Large-scale development, centralized grid connection and large-scale cross-regional transmission are the main methods for the development and utilization of renewable energy in China. However, the inherent intermittent and fluctuating characteristics of renewable energy such as wind and light make it difficult to integrate and absorb them into the grid, leading to serious abandonment of wind and light. In addition, the peak-to-valley difference in power grid load also tends to gradually expand with the increase in power demand. Large-scale energy storage, as a key technology to support the safe and stable operation of the power system, realize peak shaving and valley filling, and promote the efficient consumption of renewable energy, ha...
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IPC IPC(8): H02J3/48H02J3/50H02P9/36
Inventor 王丹陈劲帆田杰毛承雄吴嘉禾李诚
Owner HUAZHONG UNIV OF SCI & TECH