A Transient Analysis Method of Distribution Network Based on Intermittent Distributed Power Fluctuation
A technology of distributed power supply and distribution network, which is applied to AC networks, circuit devices, and AC network circuits of the same frequency with different sources, which can solve the problems of complex stability of distribution network and achieve the effect of improving accuracy.
Active Publication Date: 2022-03-08
CHINA ELECTRIC POWER RES INST +2
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Scattered photovoltaic power plants and wind power plants generally use 110kV outlets to connect to the distribution network. When the capacity of these power sources is large enough relative to the distribution network, the distribution network will be regarded as an active network, making the distribution network more stable. more complicated
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[0036] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0037] this invention figure 2 As shown in Fig. 1, the intermittent distributed power generation is connected to the distribution network to build and simulate the structure, and then analyze the transient impact of intermittent distributed power generation fluctuations on the distribution network.
[0038] Such as image 3 As shown, the grid-connected structure diagram of intermittent distributed power includes (a) grid-connected structure diagram of photovoltaic power generation system and (b) grid-connected structure of wind power generation system; it is used to analyze changes in photovoltaic light intensity, temperature, and wind speed of fans.
[0039] Such as figure 1 As shown, a distribution network transient analysis method based on intermittent distributed power fluctuations, including:
[0040] (1) Collect variable ...
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The present invention proposes a distribution network transient analysis method based on intermittent distributed power fluctuations, including collecting variable information that causes intermittent distributed power fluctuations; calculating the rate of change of each variable that causes intermittent distributed power fluctuations, and defining variables Change type: Measure and obtain the distribution network bus voltage amplitude, distribution network system frequency, and intermittent distributed power output active / reactive power under different change types, define stability indicators, and obtain the transient stability of the distribution network According to the influence of the high penetration rate on the transient stability of the distribution network, the penetration rate of the distribution network is judged; this method is easy to operate, provides a basis for the transient stability control of the distribution network, and effectively improves the intermittent Accuracy of the impact of distributed power fluctuations on distribution network transients.
Description
technical field [0001] The invention belongs to the application research field of microgrid and intelligent distribution network, and in particular relates to a distribution network transient analysis method based on intermittent distributed power fluctuations. Background technique [0002] With the access of various forms of distributed power sources, energy storage devices, micro-grids, and electric vehicle charging and discharging facilities, the distribution network has changed from a traditional passive network to an active network, promoting the transformation and upgrading of energy development, reducing The use of fossil fuels reduces carbon emissions and promotes energy conservation and emission reduction, while bringing many challenges to distribution network planning and design, operation scheduling, control and protection, and simulation analysis. Compared with the traditional distribution network, the active distribution network uses a large number of power elec...
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IPC IPC(8): H02J3/04G06Q50/06
CPCH02J3/04G06Q50/06H02J2203/20
Inventor 刘科研贾东梨盛万兴孟晓丽胡丽娟何开元叶学顺刁赢龙唐建岗李雅洁董伟杰
Owner CHINA ELECTRIC POWER RES INST