Network construction type converter voltage control method, system and equipment
By adding a compensation term to the voltage and current dual closed-loop control of the grid-type converter to compensate for virtual impedance and line impedance voltage drop, the problem of insufficient voltage support capability in the voltage and current dual closed-loop control is solved, strong voltage support for the common coupling point is achieved, and the stability of the power system is improved.
Patent Information
- Application Number
- CN202610366006.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-24
- Publication Date
- 2026-06-26
AI Technical Summary
Existing grid-type converters with dual closed-loop voltage and current control have insufficient voltage support capability for the common coupling point due to virtual impedance and line impedance voltage drop, which affects the voltage stability of the power system.
In the reactive power-voltage droop control loop of the grid-type converter with voltage and current dual closed-loop control, a voltage or reactive power compensation term is added to compensate for the voltage drop caused by the virtual impedance and the line impedance between the filter capacitor and the common coupling point, and to establish a direct droop relationship between reactive power and the voltage at the common coupling point.
It significantly improves the voltage support effect of grid-type converters at the common coupling point, enhances the voltage stability of the power system, and has a simple structure that is easy to implement in engineering.