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

A technology of sensitivity analysis and receiving end system, applied in the field of transient load shedding control optimization of DC receiving end system based on sensitivity analysis, which can solve the problems of large amount of calculation and insufficient consideration of complex stability problems in transient load shedding control optimization problem.

Active Publication Date: 2018-09-18
HOHAI UNIV +2
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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 prov

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

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[0052] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0053] The method for optimizing transient load shedding control of DC receiving end system based on sensitivity analysis of the present invention, figure 1 Shown is the flow chart of the method for optimizing the transient load shedding control of the DC receiving end system based on the sensitivity analysis of the present invention, which includes the following steps. The systems mentioned in the present invention all refer to the DC receiving end system;

[0054] Step 1. Obtain the DC receiving end system model and parameters. The model and parameters of the DC receiving end system include: the structure of the system, the input power of each tie line, the models and parameters of each synchronous generator and HVDC inverter station, the impedanc...

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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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Application Information

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IPC IPC(8): H02J3/36
CPCH02J3/36H02J2203/20Y02E60/60
Inventor 周海强熊浩清安军鞠平代飞杨阳张毅明何裕强赵娟刘轶孙冉
Owner HOHAI UNIV
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