Equivalent three-phase short circuit calculation method based on static equivalence considering grounding branches

2017 ◽  
Author(s):  
Yunling Wang ◽  
Xi Ye ◽  
Yang Liu ◽  
Yuxuan Tao ◽  
Quanyan Shi ◽  
...  
Keyword(s):  
Calculation Method ◽  
Short Circuit ◽  
Three Phase ◽  
Short Circuit Calculation ◽  
Static Equivalence

Teaching Short - Circuit Calculation with Off - Nominal Turns Ratio Transformers

TEM Journal ◽  
2021 ◽  
pp. 1525-1533
Author(s):  
Allen A. Castillo ◽  
M. Natalia Galván Osuna ◽  
Norma A. Barboza Tello ◽  
Alejandra J. Vega
Keyword(s):  
Case Studies ◽  
Short Circuit ◽  
Circuit Analysis ◽  
Industrial System ◽  
Software Simulation ◽  
Three Phase ◽  
Short Circuit Calculation ◽  
The Subject ◽  
Ieee Standards ◽  
Short Circuit Analysis

Teaching short-circuit analysis is conducted primarily through case studies; however, there are not many validated short-circuit studies available on the subject, especially when considering off-nominal turns ratio transformers. In order to improve the teaching of short-circuit analysis, a three phase short-circuit study in an industrial system according to ANSI/IEEE standards by means of Zmatrix method is presented; two case studies are considered: the industrial system with nominal and offnominal turns ratio transformers, in both cases the step by step solution is given in an explicit manner and the analytical results are validated through software simulation.

scholarly journals Integrated Power Flow and Short Circuit Calculation Method for Distribution Network with Inverter Based Distributed Generation

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Shan Yang ◽  
Xiangqian Tong
Keyword(s):  
Distributed Generation ◽  
Calculation Method ◽  
Power Flow ◽  
Low Voltage ◽  
Short Circuit ◽  
Distribution Network ◽  
Short Circuit Current ◽  
Theoretical Research ◽  
Equivalent Model ◽  
Short Circuit Calculation

Power flow calculation and short circuit calculation are the basis of theoretical research for distribution network with inverter based distributed generation. The similarity of equivalent model for inverter based distributed generation during normal and fault conditions of distribution network and the differences between power flow and short circuit calculation are analyzed in this paper. Then an integrated power flow and short circuit calculation method for distribution network with inverter based distributed generation is proposed. The proposed method let the inverter based distributed generation be equivalent toIθbus, which makes it suitable to calculate the power flow of distribution network with a current limited inverter based distributed generation. And the low voltage ride through capability of inverter based distributed generation can be considered as well in this paper. Finally, some tests of power flow and short circuit current calculation are performed on a 33-bus distribution network. The calculated results from the proposed method in this paper are contrasted with those by the traditional method and the simulation method, whose results have verified the effectiveness of the integrated method suggested in this paper.

scholarly journals A new short-circuit calculation method of power system with photovoltaic power sources

2020 ◽  
Vol 1601 ◽  
pp. 022002
Author(s):  
Gang Chen ◽  
Jiafang Wu ◽  
Yanhui Xiao ◽  
Jiajia Hu ◽  
Yunchao Chen ◽  
...  
Keyword(s):  
Power System ◽  
Calculation Method ◽  
Short Circuit ◽  
Power Sources ◽  
Photovoltaic Power ◽  
Short Circuit Calculation

scholarly journals Short-Circuit Fault Current Calculation Method for the Multi-Terminal DC Grid Considering the DC Circuit Breaker

Energies ◽  
2020 ◽  
Vol 13 (6) ◽  
pp. 1347
Author(s):  
Haipeng Jia ◽  
Jingyuan Yin ◽  
Tongzhen Wei ◽  
Qunhai Huo ◽  
Jinke Li ◽  
...  
Keyword(s):  
Calculation Method ◽  
Short Circuit ◽  
Circuit Breaker ◽  
Fault Current ◽  
Modular Multilevel Converter ◽  
Multilevel Converter ◽  
Dc System ◽  
Short Circuit Calculation ◽  
Dc Circuit Breaker ◽  
Short Circuit Fault

The analysis and calculation of the short-circuit fault current in the DC grid is of great significance to the design and configuration of the converter station and DC circuit breaker parameters. The existing flexible DC system not only includes the modular multilevel converter (MMC) converter, but also needs power equipment such as the fault current limiter and DC circuit breaker. Therefore, the system modeling and short circuit calculation of the multi-terminal DC system after adding the DC circuit breaker are also of great significance for the design of DC power system parameters and the grid troubleshooting ability. In this paper, firstly, the parameters of the four-terminal DC system of the modular multilevel converter (MMC) are simplified, and the analytical solution of the short circuit fault current of the multi-terminal DC system is given. Then, the external characteristics of the cascaded hybrid DC circuit breaker are modeled. Based on the equivalent circuit of the fault current in different stages, the short circuit calculation method of four-terminal MMC system with DC circuit breaker is obtained. This method can effectively describe the overall trend of fault current and provide the basis for the configuration of DC line protection settings and DC circuit breaker related parameters.

scholarly journals Study on characteristics and calculation method of VSC-HVDCshort circuit current under three-phase AC short circuit

2020 ◽  
Vol 446 ◽  
pp. 042079
Author(s):  
Qidi Huo ◽  
Qingmei Su ◽  
Xiaojun Tang ◽  
Yingquan Lu ◽  
Ting Huang ◽  
...  
Keyword(s):  
Calculation Method ◽  
Short Circuit ◽  
Three Phase

scholarly journals A Short-Circuit Calculation Method for DFIG-Based Wind Farms

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 52793-52800 ◽  
Author(s):  
Mingyang Liu ◽  
Wenxia Pan ◽  
Rui Quan ◽  
Hongyu Li ◽  
Tongchui Liu ◽  
...  
Keyword(s):  
Calculation Method ◽  
Short Circuit ◽  
Wind Farms ◽  
Short Circuit Calculation
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