Power generation scheduling method and device for power transmission network

Abstract

The invention discloses a power generation scheduling method and device for a power transmission network. The power generation scheduling method comprises the following steps that fault states of alllines in the power transmission network are acquired, and uncertain sets of the lines are determined according to the fault states of the lines; the start-stop strategy of each unit in the power transmission network is acquired, and then the switching action result of the units is correspondingly generated, and a unit scheduling model is established according to the minimum start-stop time, the climbing rate, the corresponding generation power cost and the uncertain set of the lines of each unit; according to preset power transmission network units and grid operation constraint conditions, theunit scheduling model is solved to obtain start-stop results of each unit in the next scheduling period; according to the obtained start-stop results of each unit in the next scheduling period, a unit switching action adjustment instruction generated, and the unit switching action adjustment instruction is sent to a power transmission network unit control device to control the start-stop action of each unit in the power transmission network. According to the power generation scheduling method, the disturbance of accidental line faults can be taken into account, and the applicability of electric system power generation scheduling decision to deal with accidental disturbance is effectively improved.

Description

technical field [0001] The invention relates to the technical field of transmission network power generation scheduling, in particular to a transmission network power generation scheduling method and device. Background technique [0002] The dispatching of the power system is to minimize the total operating cost of the system in all operating periods by optimizing the output of each generating unit under the constraints of the system operation, which is one of the key issues faced in the operation of the power system. In the actual system, due to occasional unit and line failures, it may cause a large amount of power shortages, and even cause large-scale power outages. Therefore, the N-1 and N-2 safety criteria are often used to verify the power generation plan during system operation. In recent years, with the frequent occurrence of power outages caused by multiple component failures in power systems, many scholars have extended this safety criterion to the N-k safety crit...

AI Technical Summary

Problems solved by technology

However, the traditional method takes into account the failure probability information of the unit, or considers the N-k failure and load uncertainty of the unit, and constructs a two-stage robust unit combination model for power system scheduling, but considering the failure probability of the unit is usually Smaller, some methods assume that the normal output of the unit after failure does not match the actual operation when modeling, and the above methods have defects to varying degrees, so the existing power system dispatching methods are difficult to apply in the actual operation of the power system

However, due to the long span of the transmission line and the exposure to the external environment, it is susceptible to failure due to various factors, and the existing dispatching methods of the power system are difficult to be applied in the actual operation of the power system.

Images