Power grid usable power transmission capability risk benefit decision-making method based on power flow entropy

Abstract

The invention relates to a power grid usable power transmission capability risk benefit decision-making method based on power flow entropy. The method includes: (1), acquiring running parameters of each element of a power grid; (2), performing uncertain sampling on running state of the power grid; (3), calculating power flow entropy and usable power transmission capability of the power grid in a system state after sampling; (4), judging whether sampling termination condition is reached or not; (5), building a usable power transmission capability risk benefit model; (6), combining the power flow entropy to generate a usable power transmission capability decision-making mode, and determining an optimal release value according to the model. A decision-making model combining power flow entropy of the power grid and the usable power transmission capability risk benefit model is built for the first time and comprehensively takes power grid system running state and risk benefit into consideration, decision making is performed on usable power transmission capability release value from a safety technology level and a market economy level, the release value is enabled to be more fitted with running actual condition of the power grid, and economic benefit is improved effectively.

Description

technical field [0001] The invention relates to the fields of electric power dispatching and electric power market, in particular to a risk-benefit decision-making method for power grid available transmission capacity based on power flow entropy. Background technique [0002] The Available Transfer Capability (ATC) of the power grid refers to the transmission power that can undertake further transactions in the power system, except for the power contracts that have been concluded. On the technical level, it is an important safety indicator, which intuitively reflects the safety and stability margin of the system operation; on the market level, it is the key market information, and all parties in the market can use this as a basis for arranging transactions. Therefore, its reasonable release can effectively improve the overall efficiency and economic benefits of the power system. [0003] At present, the existing technologies have the following deficiencies in the evaluation...

AI Technical Summary

Problems solved by technology

[0004] 1. It only involves the assessment of a certain aspect of available transmission capacity (such as risk assessment, safety assessment, etc.), but how to make decisions based on the assessment results, especially reasonable objective decision-making rather than subjective decision-making based on experience, is released to all participants in the power grid operation There is still a lack of specific methods for reasonable operating values ​​of available transmission capacity;

[0005] 2. The minimum value of the available transmission capacity under the "N-1" criterion (single failure safety criterion) is used as the published value, but due to the extremely low probability of occurrence of such situations in the actual operation of the power system, the available transmission capacity is released The value is too conservative to make full use of the existing transmission resources; or the economic benefit maximization of the available transmission capacity is pursued, ignoring the basic requirement of power system operation reliability; They are all divorced from the reality of market-oriented operation, and there is still a technical gap in how to comprehensively consider the system's operating status and risks and benefits;

[0006] 3. Does not involve the impact of transmission service priority, floating quotations of power generators and other realities in the electricity market environment on the evaluation and decision-making of available transmission capacity

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