Method, system and equipment for constructing virtual inertia of network-constructed inverter and medium

• Main Authors: LIN WEI, WANG HUAIYUAN, CHEN QINGJIN, CHEN KAI, LIN MOU, WANG YIHAN
• Format: Patent
• Language: Chinese; English
• Published: 07.05.2024
• 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 a virtual inertia construction method, system and device for a network-constructed inverter and a medium, and the method comprises the steps: S1, constructing a control model of a virtual synchronous machine, and building an active control ring of the virtual synchronous machine; s2, an active control loop control mode of the virtual synchronous machine is improved, an inertia adjusting coefficient is added on a constant virtual inertia, and a fault clearing angle and a maximum swing angle are controlled by adjusting the inertia adjusting coefficient; s3, in the fault period, on the basis of known fault parameters, solving a relational expression between virtual inertia and a fault clearing angle in the fault period, and obtaining an inertia adjustment coefficient k1 by using a Newton-Raphson iteration method; and S4, after the fault is cleared, on the basis of known operating parameters, quantizing a relational expression between the virtual inertia and the maximum swing angle after t