Virtual impedance droop control method based on corrected output power
By introducing a voltage correction stage into the virtual impedance droop control, the corrected output power is calculated, which solves the inverter power distribution error caused by virtual impedance power loss, and realizes accurate load distribution between inverters and improved system stability.
CN120978904BActive Publication Date: 2025-12-23SICHUAN UNIV
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Patent Information
- Application Number
- CN202511487106.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-17
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2045-10-17
AI Technical Summary
Technical Problem
Existing virtual impedance droop control methods ignore virtual impedance power loss, leading to inverter power distribution errors and system instability.
Method used
By introducing a voltage correction stage, the corrected output power is calculated, and the power loss due to virtual impedance is taken into account, thus achieving accurate and even distribution of load power.
Benefits of technology
It significantly improves the power distribution accuracy and system stability of parallel inverters, eliminates circulating current between inverters, and achieves precise distribution of load power.
✦ Generated by Eureka AI based on patent content.
Abstract
The application provides a virtual impedance droop control method based on corrected output power, and belongs to the technical field of inverter control, and the method comprises the following steps: S1, signal acquisition and calculation; S2, virtual impedance voltage correction and corrected power calculation; S3, voltage reference value generation; and S4, voltage and current inner loop control. The application realizes accurate load power sharing by taking into account the virtual impedance loss through the voltage correction link.
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