Impact of wind and solar power grid connection on microgrid reliability

doi:10.3969/j.issn.2097-0706.2023.01.008

Abstract

Abstract:

Increasing the proportion of grid-connected wind and solar power is conducive to achieving the carbon peaking and carbon neutrality. However， the randomness of wind and solar power will affect the reliable operation of microgrid. The reliability analysis can provide an evaluation basis for the smooth access of wind and solar power to microgrid. Firstly， the model of the wind and solar power output considering the randomness is established. Then， probability， frequency，duration and other indicators are introduced to analyze the reliability of microgrid. Finally， the effects of Beta distribution parameters（α and β）， wind speed， wind and solar permeability on system reliability are studied. The results show that the Beta distribution parameters can affect the photovoltaic power output， and then affect the system reliability level. Wind speed is also one of the factors affecting reliability. On the premise of avoiding damage to wind turbines cause by excessive wind speed， getting wind power accessed into power grid from areas with rich wind resources is conducive to the system reliability. When α=2.00， β=0.80， increasing the proportion of photovoltaic power is beneficial to restraining the probability indexes and customer average interruption duration index（CAIDI）， but will continue to increase the system average interruption frequency index（SAIFI）.

Key words: wind and solar power access, microgrid reliability, carbon peaking, carbon neutrality, randomness, wind and solar permeability

CLC Number:

TK01：TM761

WENG Zhipeng, ZHOU Jinghua, LI Jin, ZHAN Zhengdong. Impact of wind and solar power grid connection on microgrid reliability[J]. Integrated Intelligent Energy, 2023, 45(1): 67-74.

Figures/Tables 8

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配置方案	α	β	α/(α+β)
A₁	2.00	0.08	0.962
B₁	2.00	0.39	0.837
C	2.00	0.80	0.714
D₁	2.00	2.00	0.500
E₁	2.00	8.00	0.200

配置方案	α	β	α/(α+β)
A₂	7.20	0.80	0.900
B₂	3.20	0.80	0.800
C	2.00	0.80	0.714
D₂	0.80	0.80	0.500
E₂	0.34	0.80	0.298

风光配置比	PV比例/%	风光配置比	PV比例/%
1∶5	83.33	2∶1	33.33
1∶4	80.00	3∶1	25.00
1∶3	75.00	4∶1	20.00
1∶2	66.67	5∶1	16.67
1∶1	50.00