Self-Synchronization of Wind Farm in an MMC-Based HVDC System: A Stability Investigation

2017 ◽  
Vol 32 (2) ◽  
pp. 458-470 ◽  
Author(s):  
Mohammad Amin ◽  
Atle Rygg ◽  
Marta Molinas

Real time simulators play a major role in R&D of Offshore wind farm connected modular multilevel converter (MMC)-HVDC system. These simulators are used for testing the actual prototype of controllers or protection equipment required for the system under study. Modular multilevel converter comprises of number of sub modules (SMs) like Half/ full bridge cells. While computing time domain Electromagnetic transients (EMTs) with the system having large number of SMs pose a great challenge. This computational burden will be more when simulated in real time. To overcome this, several authors proposed equivalent mathematical model of MMC. This paper proposes the real time simulation start-up of offshore wind farm connected modular multilevel converter (MMC)-HVDC system. This paper also describes about how the above said systems is simulated in OPAL-RT based Hypersim software.


2013 ◽  
Vol 401-403 ◽  
pp. 2205-2208 ◽  
Author(s):  
Huai Zhong Li ◽  
Tong Jing ◽  
Hong Zhang

Wind energy has become a leading developing direction in electric power. The high cost associated with turbine maintenance is a key challenging issue in wind farm operation as wind turbines are hard-to access for inspection and repair. Analysis of an onshore wind farm is carried out in this paper in terms of the operation, failure, and maintenance. Failures are categorized into three classes according to the downtime. It is found that the pitch, gearbox and generator have the most amount of downtime, while the most number of failures is from the pitch and electric system. A discrete-event model is developed by using Arena to simulate the operation, failure occurrence, and maintenance of the wind turbines, with an aim to determine the main factors influencing maintenance costs and the availability of the turbines in the wind farm.


2019 ◽  
Vol 2019 (16) ◽  
pp. 2957-2959
Author(s):  
Xiaobao Hu ◽  
Xiao Wang ◽  
Linlin Wu ◽  
Hui Liu ◽  
Siqing Sheng

Author(s):  
Jikai Chen ◽  
Lin Li ◽  
Feifei Dong ◽  
Xiaozhe Wang ◽  
Hao Sheng ◽  
...  
Keyword(s):  

2017 ◽  
Vol 2017 (13) ◽  
pp. 1934-1939 ◽  
Author(s):  
Hongyang Yu ◽  
Guoliang Zhao ◽  
Yunting Hu ◽  
Benfeng Gao ◽  
Xuewei Zhang ◽  
...  

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