Compressed air energy storage power generation system and phase modulation control method thereof
A compressed air energy storage and power generation system technology, applied in the field of power systems, can solve the problems of small generator capacity, weak reactive power support, high power loss, etc., and achieve the effect of reducing operating costs, reducing usage, and improving stability
Active Publication Date: 2019-05-31
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 comprises a compressed air energy storage device, an electricgenerator, a fully-controlled excitation device, and a control circuit. A machine end of the electric generator is connected to a power grid, the compressed air energy storage device is connected to arotor of the electric generator, and the fully-controlled excitation device is connected to an excitation winding of the electric generator. The fully-controlled excitation device is also connected to the machine end of the electric generator, the control circuit is connected to each fully-controlled device of the fully-controlled excitation device, and the control circuit is also connected to the compressed air energy storage device and the machine end of the electric generator. The control circuit is used to acquire a switching signal and a control signal; the compressed air energy storagedevice is used to adjust a rotation speed of a turbine or disconnect connection with the rotor; and the fully-controlled excitation device is used to directly absorb or inject reactive power to the power grid, and adjust an excitation current of the electric generator so as to indirectly absorb or inject the reactive power to the power grid. The ability of providing reactive power support to the power grid can be increased and power grid operating cost is reduced.
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