Control method of fault-tolerant doubly-fed asynchronous all-electric ship power transmission system
A double-fed asynchronous, control method technology, applied in the direction of electronic commutation motor control, motor generator control, AC motor control, etc., can solve the problem of rapid response of unfavorable control system, reduction of power converter, unbalanced voltage of upper and lower busbar capacitors, etc. problems, to achieve the effect of improving reliability and controlling response speed
Active Publication Date: 2021-07-30
HUAZHONG UNIV OF SCI & TECH
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However, the unbalanced voltage of the upper and lower bus capacitors will greatly reduce the DC bus voltage utilization of the power converter, and the traditional vector control-based converter control method is not conducive to the rapid response of the control system
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[0050] 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.
[0051] Such as figure 1 As shown, the fault-tolerant double-fed asynchronous all-electric ship power transmission system provided by the embodiment of the present invention includes a power generation unit, a double-fed asynchronous motor, and a back-to-back power electronic converter. The power generation unit and the double-fed asynchronous motor pass through two parallel lines Connection: one of them is directly connected to the stator of the doubly-fed asynchronous motor through an AC transmission line, and the other is connected to the rotor of the doubly-fed asynchronous motor through a back-...
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The invention discloses a control method for a fault-tolerant doubly-fed asynchronous all-electric ship power transmission system, and the method comprises the steps: calculating a stator flux linkage and an angle based on the measured three-phase stator voltage and current and three-phase power side converter current, and calculating the active power and reactive power of a stator side converter and a power side converter; calculating a fault phase current bias according to an upper and lower direct current bus capacitor voltage difference value, and calculating active and reactive power compensation values of a power supply side converter; adding active and reactive power compensation values of a power supply side converter on the basis of a space vector modulation type direct power control strategy, so the control of the three-phase four-switch power supply side converter is realized; and controlling the three-phase six-switch load side converter based on a space vector modulation type direct power control strategy. The reliability and the control response speed of the doubly-fed asynchronous all-electric ship power transmission system can be improved under the condition that a back-to-back power electronic converter in the doubly-fed asynchronous all-electric ship power transmission system has a bridge arm open-circuit fault.
Description
technical field [0001] The invention belongs to the technical field of motors and systems thereof, and more specifically relates to a control method for a fault-tolerant double-fed asynchronous all-electric ship power transmission system. Background technique [0002] The development of the shipbuilding industry has an important impact on global transportation and the world economy, and the related technologies of large ships have also received considerable attention in the military field, which is an important manifestation of a country's military strength. In order to meet the ever-increasing power demand of ships, all-electric ships based on electric propulsion systems have gradually become the ship production standard of large shipyards in the world, which is also the development direction of ships in the future. The double-fed asynchronous all-electric ship power transmission system transmits power through the power transmission path based on the AC transmission line an...
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IPC IPC(8): H02P21/14H02P25/02H02P27/06H02M1/32H02M7/219H02J3/18
CPCH02P21/14H02P21/0003H02P25/02H02P27/06H02M1/32H02M7/219H02J3/18Y02E40/30
Inventor 倪锴甘醇彭国嘉胡义华
Owner HUAZHONG UNIV OF SCI & TECH