|
|
|
| Short-Circuit Current Calculation of Power System with Inverter-interfaced Energy Considered |
| Du Gongyan,Cao Wei |
| Shanghai University of Electric Power, Shanghai 200090 |
|
|
|
|
Abstract The transient characteristics of inverter interfaced energy with low voltage ride-through (LVRT) after the occurrence of power grid faults is firstly analyzed and compared with those of traditional rotating machine. It is presented that there are two major differences between these two kinds of generators, one of which is there is no DC component in the case of inverter interfaced and the other is the inverter can be assumed as current source with a sudden steady state current change when subject to grid fault, given the quick inverter’s current limiting dynamic neglected. Thus the traditional short circuit current calculation method which is based on the fact that the state variables of generators keep unchanged, cannot be applied to the grid with inverter interfaced generators because of the sudden change in steady state current of inverter. Then an improved method suitable for both the rotating machine generators and invert interfaced generators is proposed and programmed to calculate the short circuit current of power system. Lastly, the calculation results under various conditions are compared to prove the previous analysis and show the short circuit patterns for different kinds of generators and different calculation methods.
|
|
Published: 28 September 2015
|
|
|
|
| Cite this article: |
|
Du Gongyan,Cao Wei. Short-Circuit Current Calculation of Power System with Inverter-interfaced Energy Considered[J]. Electrical Engineering, 2015, 16(9): 38-42.
|
|
|
|
| URL: |
|
http://dqjs.cesmedia.cn/EN/Y2015/V16/I9/38
|
[1] 刘扩军. 电压型逆变器的短路保护[J]. 机车电传动, 1992(5): 31-35.
[2] 党克, 胡金, 严干贵. 光伏逆变器低电压穿越控制策略的研究[J]. 电力电子技术, 2013, 47(11): 22-24.
[3] 杨文华. 并网光伏电站短路特性分析与计算[J]. 宁夏电力, 2011(6): 5-7, 21.
[4] 柳彬, 谢炜, 余跃听, 等. 逆变电源短路保护及限流策略[J]. 舰船科学技术, 2011, 33(8): 95-98, 129.
[5] 刘健, 林涛, 同向前, 等. 分布式光伏电源对配电网短路电流影响的仿真分析[J]. 电网技术, 2013, 37(8): 2080-2085.
[6] 单龙飞. 含分布式电源的配电网短路计算[D]. 郑州: 郑州大学, 2013.
[7] 何仰赞, 温增银. 电力系统分析[M]. 武汉: 华中科技大学出版社, 2011: 133-160.
[8] 西交. 清华, 浙大等联合编写.电力系统计算[M]. 北京: 水利电力出版社, 1978.
[9] Mew E. Baran Felix F. Wu. Network reconfeiguration in distribution systems for loss reduction and load balancing. IEEE Transactions on Power Delivery, 1989, 4(2): 1401-1407. |
|
|
|
2015, Vol. 16 
