Conduction Angle Compensation Method of Thyristor Rectifier Power Supply Under Load Variation
A load change, rectified power supply technology, applied in the direction of AC power input conversion to DC power output, electrical components, high-efficiency power electronic conversion, etc. Problems such as terminal equipment protection actions
Active Publication Date: 2022-05-17
中国船舶重工集团公司第七〇三研究所无锡分部
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Problems solved by technology
However, limited by the response speed of the controller and the short-term runaway characteristics of the thyristor, the output voltage stability of the thyristor rectifier power supply using this control scheme is not good for step-type sudden loads, and it is prone to large-scale fluctuations in output voltage and output voltage. The problem of voltage oscillation may easily cause the protection action and device damage of the back-end equipment
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[0020] Such as Figure 1-3 As shown, taking the common three-phase full-bridge thyristor rectifier power supply as an example, the thyristor rectifier power supply is generally composed of an AC side input switch, a rectifier transformer, a rectifier and an output switch. Assuming that the output voltage of the DC side of the rectified power supply is to be stabilized at a specific value, the existing method is to collect the real-time voltage signal output by the rectified power supply through a voltage sensor, and compare the collected voltage value with the target value; compare the actual value with the target value The difference of the target value is used as the input signal of the conduction angle controller, and through the adjustment function of the PID controller, the actual value is gradually approached to the target voltage value until the two are equal. By using this method to control the output voltage of the rectified power supply, when the load changes, the PI...
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The invention relates to a method for controlling and compensating the conduction angle of a thyristor by detecting the input current of a rectifier power supply; according to the change of the input current of a rectifier power supply, the corresponding conduction angle compensation amount of a thyristor is set; When changing, reduce the fluctuation of the output voltage of the power supply caused by the change of the load side as much as possible, and improve the quality of the power supply. The method is simple to implement and low in cost, and can well overcome the problem of output voltage fluctuations caused by the short-term out-of-control characteristics of the thyristor itself, and significantly reduce the power supply output when the conduction angle of the thyristor of the traditional rectifier power supply changes in a large range. adverse effects of voltage.
Description
technical field [0001] The invention relates to conduction angle control of a thyristor rectifier power supply, in particular to a method for compensating conduction angle of a thyristor rectifier power supply under load changes, which ensures the stability and rapid recovery of the output voltage when the load of the rectifier power supply changes. Background technique [0002] The existing thyristor rectifier power supply generally adopts the traditional closed-loop PID control method, and the power supply device controls the conduction angle of the thyristor by detecting the difference between the output terminal voltage and the target voltage. However, limited by the response speed of the controller and the short-term runaway characteristics of the thyristor, the output voltage stability of the thyristor rectifier power supply using this control scheme is not good for step-type sudden loads, and it is prone to large-scale fluctuations in output voltage and output voltage....
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IPC IPC(8): H02M7/515H02M1/06
CPCH02M7/515H02M1/06Y02B70/10
Inventor 胡聪俞希学陈晓波周杰
Owner 中国船舶重工集团公司第七〇三研究所无锡分部