Inverter resonance suppression method based on power grid voltage abnormal state feedback

• Main Authors: MA YUQIN, ZHAO ZHIGUO, WANG YIHENG, YANG NAN, MO HONGYING
• Format: Patent
• Language: Chinese; English
• Published: 24.05.2019
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

The invention discloses an inverter resonance suppression method based on power grid voltage abnormal state feedback. The method comprises the steps of obtaining a given current value, calculating a current error value, calculating a modulation semaphore, and subjecting the modulation semaphore to pulse width modulation to drive a power tube of an inverter. According to the method of the invention, the method comprises the steps of collecting a power grid voltage signal; calculating a power grid voltage abnormal state value according to the power grid voltage signal; calculating an error valueof the power grid current according to the signal of the power grid current through power grid current signal acquisition; through a state feedback control method, introducing the power grid voltageabnormal state value and the power grid current error value into an inverter control strategy, and changing the pole configuration of a closed-loop system. In this way, the robustness of the inverteris improved, so that the pu