A simulation method for cascading failures of thermoelectric coupling systems under extreme cold disasters
A technology of thermoelectric coupling and simulation method, applied in the field of power grid, can solve problems such as inability to apply to extremely cold disaster weather, inability to accurately reveal the complex coupling relationship of thermoelectric systems, etc.
Active Publication Date: 2021-09-21
TSINGHUA UNIV
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[0003] The traditional OPA model usually uses a linearized power flow model, and the external environment considered is also uniform and stable, so it cannot be applied to extreme cold disaster weather with complex and changeable meteorological conditions, and it cannot accurately reveal the complex coupling relationship in the thermoelectric system
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[0015] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0016] see figure 1 , provides a cascading failure simulation method of a thermoelectric coupling system under an extreme cold disaster according to an embodiment of the present invention, including: acquiring natural disaster meteorological data and system load data at time t; updating the thermoelectric system according to the natural disaster m...
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The invention provides a cascading failure simulation method of thermoelectric coupling system under extreme cold disaster, comprising: obtaining natural disaster meteorological data and system load data at time t; calculating line failure probability based on Markov state space; Disconnect the line and update the network topology of the thermoelectric coupling system; based on the updated thermoelectric coupling system, perform thermoelectric coupling power flow calculation to identify the power limit line; disconnect the power limit line, update the network topology of the thermoelectric coupling system, and calculate The load loss of the thermoelectric coupling system at time t. The invention calculates the line failure probability of the thermoelectric coupling system under extreme cold disaster based on the Markov state space, and identifies the power limit line based on the power flow calculation, disconnects the fault line and the power line line, and can calculate the thermoelectric coupling system under the disaster The load loss can simulate the cascading failure of the thermoelectric coupling system during the disaster.
Description
technical field [0001] The invention relates to the technical field of power grids, in particular to a method for simulating cascading failures of thermoelectric coupling systems under extreme cold disasters. Background technique [0002] The simulation of cascading failures and blackouts in traditional power systems is realized through the cascading failure model (OPA model for short), which takes into account both the fast dynamic process of power system cascading failures and the slow dynamic process of power system evolution. Among them, the time scale of the fast dynamic process is within one day, and the calculation step is usually one hour, which is used to simulate the power flow change process after the system fails, so as to analyze the propagation of the fault; the slow dynamic process takes days as the unit, It is used to simulate the load growth of the power system, the construction and renovation of units or lines over a period of time. [0003] The traditiona...
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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 陈颖任正伟黄少伟沈沉
Owner TSINGHUA UNIV