A kind of iron core magnetization experimental equipment and its direct pressure adjustable SVG control method

Abstract

The invention belongs to the field of power systems, and relates to iron core magnetization experiment equipment and a direct-current voltage-adjustable SVG control method thereof. The SVG control method comprises feedforward control and cascaded H-bridge direct-current voltage control. Under the condition that the output voltage of the voltage regulator of the iron core magnetization experiment equipment under a low voltage is continuously adjustable and severely distorts, feedforward-based adaptive PI direct-current voltage adjustable control is carried out on the H-bridge direct voltages ofpower units. According to the control method, the experiment voltage of a traditional rated lop current method is reduced to 1000V, the voltage of a power source can be continuously regulated between0V and 1000V, the problem of closing impact is avoided; reactive current in an experiment is compensated through an automatic reactive power compensation device, and a power source capacity requiredby the experiment is reduced.

Description

technical field [0001] The invention belongs to the field of electric power systems, and in particular relates to an iron core magnetization experiment equipment and an SVG control method with adjustable direct pressure. Background technique [0002] Aiming at the maintenance problem of the generator stator, the excitation reactance is formed by winding the cable around the stator core of the generator, and the voltage is provided at both ends of the cable, and the temperature of the rotor core is observed with a temperature imager to check whether there is an abnormal temperature, and a large amount of reactive current will be generated during the process. When the traditional generator stator is overhauled, the 10kV voltage is passed through the circuit breaker, and the cable is wound around the generator stator core to form a magnetizing reactance. When the circuit breaker is closed, a large peak current will be generated, which will easily cause fluctuations on the 10kV v...

AI Technical Summary

Problems solved by technology

When the traditional generator stator is overhauled, the 10kV voltage is passed through the circuit breaker, and the cable is wound around the generator stator core to form an excitation reactance. When the circuit breaker is closed, a large peak current will be generated, which will easily cause fluctuations on the 10kV voltage side. , resulting in malfunction of the 10kV switch, which in turn affects the power quality of the 10kV grid side, and during the whole experiment, the power cables, circuit breakers and other devices require a relatively high withstand voltage level, and the distance between the 10kV power distribution room and the generator The installation location is relatively far away, and the required power cables are relatively long, all of which make the experiment cost high, and the entire experiment is completed in a 10kV high-voltage environment

Higher pressure environments require more skilled personnel and require more costly equipment than low pressure environments

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