Method for estimating and optimizing dynamic safety risk of power transmission system based on practical dynamic safety field

Abstract

The invention discloses a transmission system dynamic security risk evaluating and optimizing method based on practical dynamic security field, wherein, the risk evaluating relates to influence of uncertainty for risk of node injecting power and system security control measures in computing dynamic unsafety risk by establishing the dynamic unsafety risk evaluating model based on practical dynamic security field; the optimizing method performs the risk control optimation to establish the optimum model of risk control aiming at dominant preconceiving accident collection by determining and dividing the preconceiving accident collection gamma=gamma1 and gamma2. The risk evaluating model can relate to the uncertainty of node injecting power in transmission system dynamic risk evaluating and greatly reduce computing quantity of the dynamic security risk evaluating. The dynamic risk optimizing model realizes the optimizing compution of integrated control measures aiming at the preconceiving accident in expectation operating point and security control preconceiving accident collection gamma1 before adopting control measures. The optimizing compution result can be used for guiding prevention control and emergency control decision.

Description

technical field [0001] The invention relates to a power transmission system based on a practical dynamic security domain, in particular to a method for dynamically monitoring, evaluating and optimizing the safety risk of the power transmission system. Background technique [0002] Like many practical applications, the existing technology in this field also has mutual constraints in terms of economy and technical security. On the one hand, driven by market competition and economic interests, users hope that the operating state of their power system will be closer and closer to the stability limit of the system, that is, they hope that the higher the efficiency, the better. decline. On the other hand, the power system cannot ignore the monitoring of technical safety. The N-1 criterion adopted by the power industry system for many years is not enough to maintain a reasonable level of system reliability, but for a higher power system stability boundary N-2 or The planning prin...

AI Technical Summary

Problems solved by technology

[0003] However, the online probabilistic safety risk assessment system can provide the short-term system risk level of the transmission system in real time, and needs to consider various uncertain factors, which requires a large amount of calculation and high calculation speed.

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