VOLTAGE CONTROL METHOD OF DYNAMO-ELECTRIC GENERATOR

• Main Authors: OZEKI EMIKO, HOSHINO TOSHINORI, SAITO HAJIME, MIZOZOE MASAHIDE
• Format: Patent
• Language: English
• Published: 30.09.2013
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

PROBLEM TO BE SOLVED: To solve the problem that a control loop of an AVR of a dynamo-electric generator causes overshoot and undershoot to be unstable control because of becoming an open loop when changing from start-up to normal control.SOLUTION: During a power generation voltage equal to or lower than voltage corresponding to a set value, an arithmetic result by a field current setter is fixed to a value corresponding to a field current Iof a value smaller than a maximum value of a field current detection range, and an integration term of a voltage control arithmetic part is calculated with a field current detection value. When voltage is equal to or larger than a set voltage value, the calculation of the integration term with the field current detection value in the voltage control arithmetic part is released. In addition, during a rated voltage or below by a rated voltage setter, a limiter upper limit value of the field current control arithmetic part is set to a limiter upper limit value of a ratio of the rated voltage or below, and when being equal to or larger than the rated voltage, the limiter upper limit value of the field current control arithmetic part is set to the limiter upper limit value of the ratio of the rated voltage or above.