Complex cascading failure simulation method of power system
A technology of cascading failure and simulation method, applied in the field of simulation, to achieve the effect of accurate analysis and improvement of stable operation ability
Active Publication Date: 2013-11-13
STATE GRID SHANDONG ELECTRIC POWER
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Problems solved by technology
[0004] The technical problem to be solved by the present invention is that the complex fault analysis in the prior art only considers the chain breaking caused by the overload of the line, and does not consider the disturbance during the complex sequential breaking In order to provide a more accurate power system complex sequential fault simulation method, it considers not only the chain breaking caused by line overload, but also the transient problem caused by disturbance in complex sequential breaking.
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specific Embodiment approach
[0040] A specific implementation of the power system complex sequential fault simulation method described in the present invention is provided below, including the following steps:
[0041] The first step is to generate random fault scenarios, including the following process:
[0042] 1.1. Set the number of fault scenarios, randomly select the line that generates the fault, and calculate the total length of the line. Here, in order to generate faults on random lines and random positions of lines, the figure 1 In the principle of line merging shown, first calculate or find the length of each line, and obtain the length L of the i-th line i , where i is 1 to N, and N is the total number of lines, and then all the lines are connected end to end to form an overall line, the total length of the line is D,
[0043]In this embodiment, PSSE is used for simulation. PSSE (Power System Simulator / Engineering, also written as PSS / E) is a widely used power system analysis program at pr...
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The invention relates to a complex cascading failure simulation method of a power system. The complex cascading failure simulation method comprises random failure scene generation and complex cascading failure simulation, so that cascading open caused by overload of a circuit can be considered through analysis of complex cascading failure, and a transient stability problem caused by large disturbance in the cascading open with complex size in a long time can also be considered, thereby guaranteeing more accurate analysis of the complex cascading failure. Through failure simulation, the influence of a strong wind climate condition on the power system can be simulated, and failure scenes which cause system instability and loss of a large amount of electric energy are learnt, so that the operation of an actual power system can be guided according to the simulation condition, and an instable failure scene is avoided by cutting off a corresponding circuit, thereby improving the stable operation capacity of the power system after the complex cascading failure occurs.
Description
technical field [0001] The invention relates to a fault simulation method of a power system, in particular to a complex sequential fault simulation method in the power system, and belongs to the technical field of simulation. Background technique [0002] During the operation of the power system, faults will inevitably occur. How to accurately know the impact of faults on the power system has been studied a lot. In view of the influence of the physical properties of the power grid on the collapse of the power grid, the study believes that the power grid has a typical self-organized criticality (Self-Organized Criticality, SOC), and three types of cascading failure models have been proposed, including: cascading failure models based on network topology , the cascading failure model based on component cascading failure and the cascading failure and blackout accident model based on the dynamic characteristics of the power grid. The above model provides some methods of power g...
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IPC IPC(8): G06F17/50
Inventor 徐群张恒旭王泽众王公仆杨欣杨慧
Owner STATE GRID SHANDONG ELECTRIC POWER