Probabilistic short-circuit analysis of wind power system based on sampling with optimal density function

2016 ◽  
Author(s):  
Shenghu Li ◽  
Zhuang Qian ◽  
Xiaoyan Zhang
Keyword(s):  
Power System ◽  
Density Function ◽  
Wind Power ◽  
Short Circuit ◽  
Circuit Analysis ◽  
Optimal Density ◽  
Wind Power System ◽  
Short Circuit Analysis

Research on Short-Circuit Current of Wind Power System and its Impact on Relay Protection

2014 ◽  
Vol 1070-1072 ◽  
pp. 258-263
Author(s):  
Hua Bo Shi ◽  
Zhi Chen ◽  
Gan Li ◽  
Bo Zhou
Keyword(s):  
Power System ◽  
Wind Power ◽  
Short Circuit ◽  
Relay Protection ◽  
Short Circuit Current ◽  
Green Energy ◽  
Stable Operation ◽  
Technical Problems ◽  
Wind Power System ◽  
The Impact

Wind energy is clean and renewable energy with rich resources. As one of the most promising green energy, wind power has become an important part of the electricity supply. But there are still many technical problems to be solved related to wind power generation and integration, because it may have significant impact on safe and stable operation of the power grid. Therefore, the doubly-fed wind generator and direct-driven permanent-magnet wind power generator are studied. Their models are built in PSCAD/EMTDC for electromagnetic transient simulation, in order to study the characteristics of their short circuit fault current, as well as the impact on the relay protection of the wind power system. The research outcomes provide a reference and basis to wind power failure characteristics research.

scholarly journals Optimal over Current Relay Coordination of IEEE 9 Bus System using Mipower

2020 ◽  
Vol 8 (5) ◽  
pp. 1481-1485
Keyword(s):  
Power System ◽  
Short Circuit ◽  
Operating Time ◽  
Test System ◽  
Load Flow ◽  
Circuit Analysis ◽  
Main Function ◽  
Relay Coordination ◽  
Protective Relays ◽  
Short Circuit Analysis

The protective system plays a major role which has great effect on the power system operation. The modern interconnected power system consists of large numbers of protective relays and circuit breakers which constitute an integral part of the protective scheme. The main function of the relay is to sense and locate the fault and sends a command to the breaker to isolate the faulty element. The objective of the relay coordination is to provide primary as well as backup protection from any fault that is likely to occur in the power system. In this paper, overcurrent relay coordination is implemented on an IEEE 9 Bus test system using MiPower software for phase and earth faults. The Load flow analysis and the short circuit analysis on the IEEE 9 Bus test system is initially done followed by relay coordination. Fault MVA and Fault current data obtained from short circuit analysis enables us to obtain operating time of the relays used in the test system. The calculated value of operating time gives the coordinated operation of all the relays. The MiPower software has unique feature which is very useful in proper coordination of overcurrent relays.

Sign in / Sign up

Export Citation Format

Share Document