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AC/DC power distribution network reliability evaluation method based on non-sequential Monte Carlo method

A technique of Monte Carlo method, distribution network, applied in the direction of AC network, AC network circuit, electrical components, etc. with the same frequency from different sources

Inactive Publication Date: 2020-07-10
TIANJIN UNIV +2
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a reliability evaluation method suitable for AC-DC hybrid distribution network to solve the reliability evaluation problem of AC-DC hybrid distribution network under the high penetration rate of distributed power supply

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  • AC/DC power distribution network reliability evaluation method based on non-sequential Monte Carlo method
  • AC/DC power distribution network reliability evaluation method based on non-sequential Monte Carlo method
  • AC/DC power distribution network reliability evaluation method based on non-sequential Monte Carlo method

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specific Embodiment

[0107] For this embodiment, first input the impedance value of the line elements in the AC-DC power distribution system, the active power and reactive power of the load elements, and the network topology connection relationship, its structure is as follows figure 2 As shown, see Table 1 and Table 2 for detailed parameters; set three converters, their positions are 13-152, 60-160, 54-94, the capacity of the converters is set to 5MVA, and the loss coefficient is set to 0.02; consider For the high penetration rate access of distributed power sources, 5 groups of distributed power sources are respectively connected to nodes 3, 54, 57, 61, and 80, with a capacity of 2MVA; the minimum value of node voltage is set to 0.93p.u., and the maximum value of node voltage is set is 1.07p.u.

[0108] In order to analyze the impact of DC power distribution technology on system reliability, a set of comparative examples is set up on the basis of the above-mentioned AC-DC hybrid distribution ne...

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Abstract

The invention provides an AC / DC power distribution network reliability evaluation method based on a non-sequential Monte Carlo method. The method comprises the following steps: 1, executing accordingto a selected AC / DC hybrid power distribution network; 2, according to the structure and parameters of the AC-DC hybrid power distribution network provided in the step 1, sampling the element state inthe system through thenon-sequential Monte Carlo method, sampling renewable energy output and a load value according to the renewable energy and load output probability model, and finally obtaining the load value and the renewable energy output; 3, judging whether an element fault exists or not according to the load value and the renewable energy output provided in the step 2, and obtaining an element fault state. The method aims at solving the reliability evaluation problem of the AC / DC hybrid power distribution network, and adapts to the volatility of renewable energy sources and loads, a comprehensive time sequence sampling method, converter control mode switching and an optimal load shedding method.

Description

technical field [0001] The invention relates to a method for evaluating the reliability of an AC / DC distribution network, in particular to a method for evaluating the reliability of an AC / DC distribution network based on a non-sequential Monte Carlo method. Background technique [0002] For the distribution network, the high penetration rate of renewable energy (Renewable Energy Sources, RES) will make its steady-state operation present many new features. The source end and the load end of the power grid will show greater uncertainty, and the operation form will be more complex, forming the characteristics of two-way power flow in the power grid. Due to the volatility of renewable energy power generation, with a high proportion of renewable energy connected to the distribution network, the peak-to-valley difference will even exceed the fluctuation of the load, becoming the main source of uncertainty in the operation of the power grid, and affecting the power quality of the p...

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Application Information

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IPC IPC(8): H02J3/00H02J3/38H02J3/06H02J5/00
CPCH02J3/00H02J3/06H02J5/00
Inventor 魏炜周逸彤侯恺徐弢罗凤章王亚峰徐绍军孟颖于德明刘辉
Owner TIANJIN UNIV
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