On-line Calculation Method of Maximum Active Power Output of New Energy Considering Power Grid Operational Constraints

Abstract

The invention discloses an online calculation method for the maximum value of new energy active power output taking into account the operation constraints of a power grid, and belongs to the technical field of power system scheduling automation. The present invention proposes to first estimate the online quota interval of the stable section, and then, taking into account the median value of the online quota interval of the stable section and the peak regulation constraint, construct a new energy power station that considers the grid safety impact performance and economic and environmental protection performance of the new energy power station and the conventional unit. Active power output maximization calculation model, and then perform static security check on the grid operation state obtained by the optimization calculation, and modify the online limit range of the stable section, through iteration, obtain the grid operation state that meets the static security and peak regulation constraints Transient and dynamic safety checks are performed on the operating state, and through iterations, the operating state of the power grid that satisfies the constraints of transient state, dynamic safety, and peak regulation is obtained, and the sum of the corresponding new energy active output is used as the new energy active power that takes into account the operating constraints of the power grid Maximum output.

Description

technical field [0001] The invention belongs to the technical field of power system dispatch automation, more precisely, the invention relates to a method for online calculation of the maximum value of new energy active power output taking into account static, transient and dynamic safety constraints and peak regulation constraints of power grids. Background technique [0002] New energy power generation has the characteristics of intermittent and randomness. In order to consume new energy power to the maximum extent, it is necessary to predict the performance of the new energy power station's active power output, the real-time operation adjustment performance of the new energy power station and conventional units, and the economic and environmental protection performance, and consider new energy. The influence degree of the active power output of energy power stations and conventional units on the online safety and stability characteristics of the power grid is dispatched on...

AI Technical Summary

Problems solved by technology

In fact, the limit of the stable section is not only related to the power grid equipment on / off status and load distribution, but also related to the output of new energy power stations and conventional units. It is impossible to determine the stable section limit before the calibration

Using the offline limit or online limit at the current moment to calculate the maximum value of new energy active output in the future will inevitably have the defect that the calculation accuracy is difficult to guarantee

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