A method, system and storage medium for evaluating regional equivalent inertia of a power system
By dividing the power system into regions and solving the equivalent inertia constant, the difficulty of regional inertia evaluation of the power system is solved, and the grid frequency is stable and safe operation is achieved.
CN119298114BActive Publication Date: 2025-03-21HUNAN UNIV
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Patent Information
- Application Number
- CN202411843294.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2044-12-13
AI Technical Summary
Technical Problem
The prior art is difficult to quickly evaluate the regional inertia level of power systems, resulting in system frequency stability problems and increased risk of power outage.
Method used
By dividing the power system into different regions, the generator equal value in each region is an equal value generator, the measurement data is obtained and filtered. Then, the inertial constant H to be evaluated is solved using dichotomy to iteratively, and the regional equivalent inertia is characterized.
Benefits of technology
It realizes a rapid assessment of the regional inertia level of the power system, helps dispatchers monitor and make decisions, and ensures the safe and stable operation of the power grid.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention discloses a method, system and storage medium for evaluating regional equivalent inertia of a power system, comprising: dividing a power system into different regions, respectively evaluating all generators in each region as one equivalent generator, and obtaining measurement data of each equivalent generator, wherein the measurement data comprises: output power and frequency of the equivalent generator; aggregating the output power of all generators in the region as the output power of the equivalent generator, obtaining the regional inertia center frequency by selecting generators with inertia constants greater than a preset inertia constant threshold from each region, and using the regional inertia center frequency as the frequency of the equivalent generator; filtering the measurement data of each equivalent generator to obtain filtered measurement data; and iteratively solving the inertia constant to be evaluated by using a dichotomy method in combination with the sign of the mean value of the frequency prediction error. H , the inertia constant to be evaluated H To characterize the regional equivalent inertia.
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