A permanent magnet power generation system and its control method for reducing DC side voltage fluctuations
A technology of DC side voltage and permanent magnet power generation, which is applied to control generators, control systems, and control generators through magnetic field changes. It can solve problems such as large output voltage fluctuations, reduce DC side output voltage fluctuations, and achieve simple Effect
Active Publication Date: 2021-06-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is to overcome the problem of large output voltage fluctuations on the DC side of the permanent magnet controllable power generation system in the prior art under the condition of a sudden load change, and to provide a simple, effective and reliable method for reducing voltage fluctuations on the DC side. The control method of the permanent magnet generator system
Method used
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Embodiment Construction
[0017] The technical scheme of the present invention is described in detail below in conjunction with accompanying drawing:
[0018] figure 1 A structural diagram of a preferred example of a permanent magnet power generation system that reduces DC link voltage fluctuations of the present invention is shown, as figure 1 As shown in , the armature winding of the high-impedance permanent magnet generator is connected in star form, and the output end of the armature winding is connected to the bridge conversion circuit (such as figure 1 shown, including the switching tube T 1 ~T 6 , and the midpoint of the bridge arm of the filter capacitor C), the generator circuit breaker K 1 Connect the positive end of the DC bus side with the electrical load. During generating operation, the DC side of the bridge converter supplies power directly to the electrical load. Hall current sensor H a ~H c Detect the phase current i of the armature winding of the permanent magnet motor a ~i ...
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The invention discloses a permanent magnet power generation system and its control method for reducing voltage fluctuations on the DC side. Transformer, decoding circuit, current sensor for real-time acquisition of motor three-phase armature winding current, voltage sensor for real-time acquisition of DC side output voltage, electrical load; method part replaces PI controller with two-degree-of-freedom controller and applies it to the outer loop The voltage loop adjusts the set value following performance and anti-interference performance of the system through two sets of adjustable parameters. In order to further reduce the fluctuation of the DC side voltage when the load is suddenly added or unloaded, the command value of the DC side voltage is adjusted by controlling the variation of the AC axis current. When the load is suddenly added, the command value of the DC side voltage increases. When the load is suddenly unloaded, the DC side voltage command value decreases. The invention does not need additional hardware, is simple to realize, and can reduce the fluctuation of the output voltage of the direct current side under the conditions of sudden loading and unloading, and improve the dynamic performance of the system.
Description
technical field [0001] The invention relates to a power generation system, in particular to a control method of a permanent magnet power generation system for reducing DC side voltage fluctuations, and belongs to the technical field of power generation. Background technique [0002] Onboard systems are expected to have lower fuel consumption, lower weight, safer and easier maintenance. Therefore, the concept of more electric aircraft was proposed. More electric aircraft use electrical systems to replace pneumatic and hydraulic systems, such as engine starting, environmental control systems, wing anti-icing systems, drive systems, and more. At the same time, more electric aircraft have led to an increasing demand for electrical energy, which is provided by engine-driven generators. Therefore, the type of generator will have a great influence on the aircraft power system. Permanent magnet motors have the advantages of high power density, high efficiency and high speed. Comb...
Claims
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IPC IPC(8): H02P9/10H02P9/30H02P101/30
CPCH02P9/105H02P9/305H02P2101/30
Inventor 张卓然黄健蒋云逸韩建斌
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS