DC receiving-end system transient load shedding control optimization method based on sensitivity analysis

Abstract

The invention discloses a DC receiving-end system transient load shedding control optimization method based on sensitivity analysis. The method comprises the steps of 1, acquiring a DC receiving-end system model and a parameter; 2, based on the acquired DC receiving-end system model and the parameter acquired in step 1, calculating a system transient stability margin and a sensitivity matrix in acurrent load shedding rate; 3, according to the calculated system transient stability margin and the sensitivity matrix in the current load shedding rate, establishing a mathematical model of a DC receiving-end system transient load shedding control optimization problem; and 4, for the established mathematical model of the DC receiving-end system transient load shedding control optimization problem in the step 3, solving the load shedding control optimization problem according to an approximate linear planning method based on sensitivity analysis. The DC receiving-end system transient load shedding control optimization method has advantages of effectively reducing calculation amount, improving optimizing speed, and reducing economic cost in load shedding as possible under a precondition that the system has the preset transient stability margin.

Description

technical field [0001] The invention relates to the technical field of transient load shedding control of electric power systems, in particular to an optimization method for transient load shedding control of a DC receiving end system based on sensitivity analysis. Background technique [0002] my country's northwest and southwest regions are rich in high-quality clean energy, while loads are concentrated in central and eastern China. Therefore, long-distance and large-scale transmission of electric energy is required. HVDC (high voltage direct current, high voltage direct current) power transmission technology is mature, has good economy and safety, and has been widely used increasingly. [0003] Compared with the traditional power system, the proportion of external power supply in the DC receiving end system has been greatly increased. Due to the extremely fast response of the power electronic device, the equivalent inertial time constant of the system is reduced, and the...

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Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the technical defects of insufficient consideration of the characteristics of the DC receiving end system in the prior art, insufficient consideration of complex stability issues, and a large amount of calculation for the transient load shedding control optimization problem, and provide a method based on The transient load shedding control optimization method of the DC receiving end system based on sensitivity analysis uses the sensitivity information of the transient stability margin to quickly solve the optimal load shedding scheme, and minimizes the economic cost of load shedding on the premise of ensuring the system's transient stability

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