A dynamic capacity increase method for power transmission and transformation equipment coordinated with unit combination scheduling

Abstract

The invention discloses a power transmission and transformation equipment dynamic compatibilization method in cooperation with unit combination scheduling. The method comprises steps that a differential equation is established, and a maximum compatibilization operation load rate of a power transmission line and a transformer under safety constraints is calculated; from two aspects of transmission loss and equipment life loss, quantization calculation of compatibilization operation cost of the transmission and transformation equipment is carried out to acquire a power transmission and transformation compatibilization operation cost curve under different load rates; according to a power transmission and transformation equipment failure rate, an acceptance-rejection sampling method is utilized to acquire a sequential operation state of separate equipment, and a sequential operation state of the system is acquired through combination; for the system operation state acquired through sampling, a set combination and power transmission and transformation equipment compatibilization plan cooperation model is solved to acquire a scheduling plan and economic indexes in the system operation state; through determining whether convergence conditions of Monte Carlo cycle are satisfied, a system scheduling decision scheme database and economic index expectations are acquired. The method is advantaged in that system operation cost is reduced, and power grid safety is guaranteed.

Description

technical field [0001] The invention belongs to the field of power system operation and control research, and in particular relates to a method for dynamically increasing the capacity of power transmission and transformation equipment coordinated with unit combination scheduling. Background technique [0002] With the continuous development of the regional economy and the large-scale access to renewable energy, the contradiction between the lagging power grid construction and the high demand for electricity has become increasingly prominent. Under the power market mechanism, power grid companies need to operate power equipment closer to the limit. How to balance the safety and economy of power grid operation puts forward higher requirements for power grid dispatching and control. The unit combination problem based on security constraints (SCUC) and dynamic capacity increase technology are two effective means to tap the transmission capacity of the power grid and solve the po...

AI Technical Summary

Problems solved by technology

Therefore, the traditional unit combination problem is a static optimization problem

However, most of the current research on the dynamic capacity increase technology of power transmission and transformation equipment focuses on the dynamic capacity increase capability of a single device, and does not consider how to arrange capacity increase equipment and how to arrange capacity increase time from the perspective of the system.

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