A Calculation Method of Available Transmission Capacity Based on Probabilistic Power Flow

Abstract

The invention relates to an available transmission capacity calculation method based on the probabilistic power flow. According to the method, the probabilistic ATC of a probabilistic power flow calculating system is used, and the calculated amount of the method is greatly reduced compared with that of a simulation method, so that the calculating speed of the system probabilistic ATC is increased, and the calculating speed of AQTC is increased. The concepts of transmission element ATC and system ATC influence factors of the transmission element ATC are raised, transmission elements are sequentially added to a power system according to the sequence of the influence factors from large to small, more influences of the transmission elements are considered in a system probabilistic ATC result, the deviation between the result and actual system probabilistic ATC expectation is gradually reduced, the requirement for the probabilistic ATC calculation accuracy of the system is met, and the requirement for the AQTC calculation accuracy is met. Thus, the available transmission capacity calculation method can be widely applied to the fields of probabilistic available electric quantity transmission capacity calculation and probabilistic available transmission capacity calculation.

Description

technical field [0001] The invention relates to a calculation method of available transmission power, in particular to a calculation method of available transmission capacity based on probability flow. Background technique [0002] As a clean renewable energy, wind power has been vigorously developed in today's increasingly severe energy crisis. However, with the continuous expansion of the grid-connected scale of wind power, wind curtailment by wind farms is gradually becoming a common phenomenon in grid operation. Due to the obvious complementary advantages of inter-regional resources in my country, through large-scale coordination, the inter-regional load staggering effect and the complementary effect between power structures can be fully utilized, so as to maximize the consumption of wind power and other renewable energy sources. Regional grid for long-distance transmission. Generally speaking, the production plan of a power generation company is given by the higher-lev...

AI Technical Summary

Problems solved by technology

Although the speed is significantly improved, only one bottleneck line is considered, and the probabilistic influence of other transmission components is ignored, which makes the calculation accuracy of the algorithm difficult to meet

[0011] To sum up, in the existing probabilistic ATC calculation methods, the models of methods (1)-(4) are too complicated and the calculation is too time-consuming; although the calculation speed of (5) is guaranteed, the bottleneck conditions considered are too few and the accuracy is not enough

If the calculation speed of probabilistic ATC is too slow, it will make it difficult to guarantee the calculation efficiency of AQTC, and it will be difficult to use it in engineering; if the calculation accuracy of probabilistic ATC is not enough, the deviation between the subsequent calculated AQTC and the actual value will be too large, It can not play a guiding role for both parties in the transaction, resulting in waste or shortage of power resources

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