High-voltage direct-current (HVDC) power transmission system maintenance time optimization method with power grid operation risks considered

Abstract

The invention discloses a high-voltage direct-current (HVDC) power transmission system maintenance time optimization method with power grid operation risks considered. The method includes the following steps that essential data of power grids is acquired; the transmitting end power grid and the receiving end power grid are simplified into single-bus models with HVDC power transmission systems as the center, and power grid models containing the HVDC power transmission systems are obtained; maintenance risks of the HVDC power transmission systems are calculated according to the probability of random breakdown of the HVDC power transmission systems in each time frame, the fixed charge of overall maintenance in the planned maintenance period and the power generation amount of generator sets in the transmitting end power grid and the receiving end power grid; breakdown risks of the HVDC power transmission systems are calculated according to the probability of random breakdown of the HVDC power transmission systems in each time frame, the load levels of the transmitting end power grid and the receiving end power grid and the spinning reserve capacity; the maintenance time is obtained according to an objective function for minimizing the total risks of the HVDC power transmission systems with the maintenance risks and the breakdown risks considered. By means of the method, integration of maintenance decision making and power grid operation risks of the HVDC power transmission systems is achieved, and preventive maintenance of equipment is completed at the time when maintenance is most needed by a power grid system.

Description

technical field [0001] The invention relates to the field of power grid maintenance, in particular to a method for optimizing the timing of maintenance of a high-voltage direct current transmission system considering the operation risk of the power grid. Background technique [0002] High Voltage Direct Current (HVDC) transmission system is mainly used for high-power, long-distance transmission of electric energy. The receiving end grid has limited spinning reserve for it. When random failures occur in the HVDC transmission system, it may cause the receiving end grid Emergency load shedding may even cause the power grid to be disconnected, which will have a serious impact on the receiving end power grid. [0003] A reasonable HVDC transmission system maintenance strategy is of great significance to improve its reliability and utilization efficiency. At present, the maintenance of HVDC transmission systems adopts a regular maintenance strategy. Periodic maintenance does not ...

AI Technical Summary

Problems solved by technology

This method takes the maintenance rate of return as the optimization goal, which is conducive to the effective development of maintenance work and the reduction of costs, and prevents excessive maintenance. During the operation of the power grid, the maintenance decision of the HVDC transmission system will have a significant impact on the economy and reliability of the system. Only considering the improvement of maintenance revenue may cause "under-maintenance", leading to an increase in the risk of system failure. Therefore, for the present invention It is more important to achieve a compromise decision between failure risk and maintenance risk

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