Method, device, medium and equipment for determining inertia time constant of power system
By employing virtual inertial control technology and inertia boundary value determination methods, the problem of low inertia accuracy in the power system of new energy units has been solved, frequency stability and inertia accuracy have been improved, virtual inertia control of wind turbine units has been optimized, and control costs have been reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- EAST CHINA BRANCH OF STATE GRID CORP
- Filing Date
- 2025-01-14
- Publication Date
- 2026-07-17
AI Technical Summary
Existing methods for determining the inertia of power systems that include new energy generating units result in low accuracy of equivalent inertia, affecting frequency stability and leading to issues such as exceeding frequency safety limits and increased control costs.
By using virtual inertial control technology, the change in kinetic energy of the wind turbine during the inertial response process is converted. Combined with parameters such as frequency change rate, frequency deviation, and inertial sensitivity, the inertial boundary value and optimal inertial time constant of the power system are determined. An objective function is constructed, and the change in rotor speed of the wind turbine is solved to obtain the inertial time constant of the wind turbine and the power system.
It improves the accuracy of the equivalent inertia of the power system, reduces the rate of frequency change and the depth of frequency drop, enhances frequency stability, optimizes the virtual inertia control of wind turbine units, provides frequency support, and reduces control costs.
Smart Images
Figure CN122418878A_ABST