scholarly journals Simulation Analysis of Arc Interruption Characteristics in Disconnector

Machines ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 6
Author(s):  
Jianning Yin ◽  
Shanshan Yu ◽  
Shiwei Ge ◽  
Xinghua Liu ◽  
Chao Liu

Wind and solar energy are examples of clean energy that are widely developed and utilized in order to achieve the goal of carbon neutrality. Higher requirements for the safety and reliability of the power grid are put forward after they are connected to it. In the case of disconnectors, as the power system’s protection equipment, their arc interruption characteristics are closely tied to the safety and reliability of the power system. In addition, a disconnector is required to be able to break the DC arc in the photovoltaic power generation system. Therefore, this paper focuses on the arc evolution characteristics in disconnectors. A magnetohydrodynamics (MHD) model of disconnectors was built. In this model, not only are the coupling of the electromagnetic field and the airflow field considered, but also the characteristics of the external circuit. Therefore, not only can arc evolution characteristics be obtained through this simulation model, but the breaking performance will also be directly obtained. The temperature, pressure and velocity distribution are obtained to analyze the evolution process. The curve of current versus time is calculated to analyze the breaking performance. The evolution characteristics of AC and DC arcs in the disconnector are analyzed by calculation and comparison. This provides theoretical guidance for the optimal design of DC disconnectors through simulation analysis.

2015 ◽  
Vol 733 ◽  
pp. 203-206 ◽  
Author(s):  
Yan Long Li ◽  
Jing Xu ◽  
Chong Yuan

Solar photovoltaic power generation as an inexhaustible, inexhaustible clean energy has become the focus of future energy development. Along with photovoltaic power generation incorporated into the power grid, in order to make power generation plan reasonably, ensure the stable operation of power system, need to forecast the photovoltaic power output. In this paper solar photovoltaic power generation forecasting methods are analyzed and summarized. According to the application of solar photovoltaic power generation and demand, mainly on photovoltaic power generation system power prediction research method has carried on the comprehensive elaboration, hoping for the researches play an important role in promoting and advancing the development of solar photovoltaic prediction methods.


IEEE Access ◽  
2021 ◽  
Vol 9 ◽  
pp. 37834-37839
Author(s):  
Yuxin Zha ◽  
Jian Lin ◽  
Guanjun Li ◽  
Yue Wang ◽  
Yizhang

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