A static security region based cross-region protocol power transmission plan correction method and system

By constructing a static security domain based on the static security domain method, the scheduling results are solved time-by-time and the transmission power of the inter-regional agreement transmission plan is relaxed. This solves the problem that the inter-regional agreement transmission plan cannot meet the power balance and security constraints, and realizes the effective correction of the scheduling plan and the safe guarantee of grid operation.

CN115986920BActive Publication Date: 2026-07-03CHINA SOUTHERN POWER GRID COMPANY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
CHINA SOUTHERN POWER GRID COMPANY
Filing Date
2022-12-13
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In power systems, inter-regional transmission plans cannot meet power balance and security constraints, resulting in no feasible solution for dispatch plans. Existing dispatch plan correction methods cannot effectively adjust the transmission power limits of inter-provincial physical interconnection lines, causing some provincial units to be unable to eliminate the problem of exceeding dispatch plan limits.

Method used

A method for correcting cross-regional agreement transmission plans based on static security domains is adopted. By constructing a static security domain for the power system, solving the scheduling results time by time, calculating the correction distance and sensitivity during the over-limit period, relaxing the transmission power of the cross-regional agreement transmission plan, optimizing the generating power of the units and the transmission power of the tie line, and adjusting the limit of the agreement transmission plan to eliminate safety over-limits.

Benefits of technology

It has improved the effectiveness of cross-regional power transmission plan correction, enhanced the safety assurance capability of power grid operation, expanded the optimization space of dispatch plan correction, and ensured the satisfaction of power balance and safety constraints.

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Abstract

This invention discloses a method and system for correcting inter-regional power transmission plans based on static security domains. The method includes: constructing a static security domain for the power system time-by-time according to the initial first boundary conditions of the regional power grid dispatch plan, and pre-solving the first dispatch results for each time period; determining each time period exceeding the limit; using the transmission power of the inter-regional power transmission plan as the correction object for each time period exceeding the limit, calculating the correction distance for each time period exceeding the limit, and calculating the corresponding sensitivity; relaxing the transmission power of the corresponding first inter-regional power transmission plan based on the sensitivity, and obtaining the transmission power constraint conditions for the second inter-regional power transmission plan; and solving the second dispatch results for each time period to complete the correction of the regional power grid dispatch plan. This invention can expand the optimization space of the dispatch plan correction optimization problem, enhance the dispatching agency's ability to ensure the safety of power grid operation, and improve the effectiveness of inter-regional power transmission plan correction.
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