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Method and system for multi-disaster coupled cascading failure analysis of power grid

A technology of cascading failures and analysis methods, applied in electrical digital data processing, data processing applications, instruments, etc., can solve the problem of not considering the influence of multiple disasters coupled with power grid components, and achieve strong practicability, high accuracy, and reduced losses. Effect

Active Publication Date: 2022-05-27
STATE GRID HUNAN ELECTRIC POWER +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a power grid multi-disaster coupling cascading failure analysis method and system, which is used to solve the technical problem that the existing power grid cascading failure analysis does not consider the influence of multiple disaster coupling on power grid components

Method used

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  • Method and system for multi-disaster coupled cascading failure analysis of power grid
  • Method and system for multi-disaster coupled cascading failure analysis of power grid
  • Method and system for multi-disaster coupled cascading failure analysis of power grid

Examples

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Effect test

Embodiment 1

[0064] see figure 1 , a method for analyzing a multi-hazard coupled cascading failure of a power grid in this embodiment includes the following steps:

[0065] S1: Set the initial conditions for the simulation analysis of grid cascading failures;

[0066] The initial conditions of power grid cascading failure simulation analysis include: total power grid simulation analysis time T end ; Power flow calculation method and convergence conditions; power grid simulation time step Δt; overcurrent protection action time T oc and action mode A oc ; Distance protection action time T z and action mode A z ;Temperature protection action time T temp and action mode A temp ;Low voltage protection action time T u and action mode A u ; and the low frequency protection action time T f and action mode A f .

[0067] S2: Read grid data.

[0068] 2.1 Reading the primary parameters of the power grid includes: topology data, line parameters, transformer parameters, load parameters, gen...

Embodiment 2

[0132] This embodiment is an application example of Embodiment 1, including the following steps:

[0133] S1: Read the grid data, including the parameters of 1711 lines, 1323 busbar parameters, 121 motors (including excitation and controller), 233 capacitors and inductances, and 667 loads in the primary parameters of the grid.

[0134] S2: Read the secondary parameters of the power grid, including: transmission line, generator, busbar relay protection device configuration and the setting value of overcurrent protection, distance protection, temperature protection, low voltage protection and low frequency protection;

[0135] S3: Establish a hybrid differential-algebraic equation for the power grid.

[0136] S4: Set the initial conditions for the simulation analysis of grid cascading failures;

[0137] The total duration of power grid simulation analysis T end for 2 hours;

[0138] The grid power flow calculation method is Newton-Raphson power flow, and the convergence condi...

Embodiment 3

[0155] This embodiment provides a multi-hazard coupling cascading failure analysis system for a power grid, including a memory, a processor, and a computer program stored in the memory and running on the processor, and the processor implements any of the above-mentioned embodiments when the computer program is executed. step.

[0156] To sum up, the present invention adopts a multi-hazard coupling cascading failure analysis method that integrates the operation mode of the power grid, the action characteristics of the relay protection, and the trip probability of the external environment and other factors. According to the type of relay protection that the power grid actually trips, a relay protection model is established to realize the fault simulation of the power grid components; based on the development process of the external environment of the power grid, the failure probability of various external disasters to the power grid is introduced in real time; the power grid of t...

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Abstract

The invention discloses a power grid multi-disaster coupling cascading failure analysis method and system, comprising: acquiring primary parameters and secondary parameters of the power grid, establishing a dynamic power grid system model; acquiring external environment data, inputting the dynamic power grid system model, and judging if there is External grid fault events, get the sequence of grid component failures caused by the external environment in the initial grid operation mode; establish a grid hybrid differential algebraic equation; according to the initial conditions of the grid cascading fault simulation analysis and the established grid hybrid differential algebraic equation for the dynamic grid system model Perform simulation; during simulation, according to the admittance matrix Y bus Judging whether the power grid is disconnected, if not, continue the calculation; judge whether to end the simulation; form a chain of faults in the power grid; output simulation data, and comprehensively evaluate the operation risk of the power grid. The invention can consider the influence of multi-disaster coupling cascading faults of the relay protection action characteristics on the grid components.

Description

technical field [0001] The invention relates to the field of power system analysis and control, in particular to a method and system for analyzing a multi-hazard coupling cascading failure of a power grid. Background technique [0002] Various accidents and disasters in the power grid show a trend of high frequency. A large number of cases show that the continuous exchange of material and energy between various dynamic processes of accidents and disasters, and between various dynamic processes and the environment, often forms a disaster chain, which plays a key role in the continuous amplification of the disaster evolution effect. Therefore, facing the overall goal of comprehensive risk prevention of major accidents and disasters, it is urgent to change from the study of a single disaster to the study of the complex evolution of the disaster chain and its prevention technology. [0003] Major accidents and disasters often contain multi-hazard coupling and mutual secondary d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06G06Q50/06G06F30/20G06F113/04
CPCG06Q10/0635G06Q50/06G06F30/367
Inventor 陆佳政周特军吴传平陈宝辉郭俊
Owner STATE GRID HUNAN ELECTRIC POWER
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