A security-constrained economic dispatch method, system, device and readable storage medium

Abstract

The present application discloses a method, system, device and computer-readable storage medium for security-constrained economic scheduling, and establishes an objective function and constraint conditions aiming at realizing dynamic operation reserve demand and considering the operation reserve price and operation reserve plan of generating units , by substituting the given power grid operation reserve demand into the objective function and constraints, calculate the unit output plan and the operation reserve plan, and then use the operation reserve plan to obtain the current power grid operation reserve demand, and compare the current power grid operation reserve demand with the last current power grid Run the backup demand to judge whether the convergence coefficient is met. If not, resubstitute the current power grid operation backup demand into the objective function and constraint conditions to obtain the next power grid operation backup demand, repeat iterations until the convergence coefficient is satisfied, and output the current power grid operation The backup demand and unit output plan reduce the system operation backup level, improve the power availability of the generator set and the operation efficiency of the power grid.

Description

technical field [0001] The present invention relates to the technical field of electric power dispatching automation, in particular to a security-constrained economic dispatching method, system, device and computer-readable storage medium. Background technique [0002] Operation reserve is an important content in the arrangement of power system operation mode. Its purpose is to stabilize the mismatch between supply and demand caused by load forecast deviation, and to meet the power shortage caused by grid equipment failure. [0003] In the arrangement of traditional power grid operation mode, the method of constant operation reserve reservation is often adopted. Its main feature is to determine the operation reserve level of each period of the day according to the impact of load forecast deviation under extreme power grid mode and the maximum power shortage that may be caused by a single component failure. Based on this, the power generation plan of the generating set is com...

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Problems solved by technology

[0003] In the arrangement of traditional power grid operation mode, the method of constant operation reserve reservation is often adopted. Its main feature is to determine the operation reserve level of each period of the day according to the impact of load forecast deviation under extreme power grid mode and the maximum power shortage that may be caused by a single component failure. Based on this, the power generation plan of the generating set is compiled, but in the method of constant operation reserve reservation, the probability of extreme mode occurrence is small and the duration is short, resulting in the reserve operation reserve is often not fully utilized during operation, objectively At the same time, because a large amount of power generation resources are used for reserve operation, the actual available power generation capacity is affected, resulting in high power and operation reserve costs

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