Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

Article retrieval

文章检索

首页 >> 文章检索 >> 往年索引

交直流电力系统短路计算方法讨论

来源:电工电气发布时间:2022-01-20 14:20 浏览次数:452

交直流电力系统短路计算方法讨论

董哲,何炜
(广东工业大学 自动化学院,广东 广州 510006)
 
    摘 要:PSASP 和 BPA 是国内使用十分普遍的两种短路计算程序,即使采用相同的计算模式和计算条件,两种程序的计算结果也可能存在差异。通过理论分析和仿真计算对产生差异的原因进行解析,着重讨论交直流系统短路电流有效值、短路容量、短路比及有效短路比的恰当计算方法。建议基于潮流计算短路电流时,把直流功率对应的等值阻抗计入短路计算所用节点阻抗矩阵中;计算短路比和有效短路比指标时,采用基于网络模式下、换流母线电压为 1.0 p.u. 时戴维南等值法的短路容量计算结果。以不同规模的交直流系统为算例,对所提提议的有效性进行分析,有助于完善电力系统短路计算理论的应用。
    关键词:交直流电力系统;基于潮流的短路计算;基于网络的短路计算;戴维南等值法;叠加法
    中图分类号:TM713     文献标识码:A     文章编号:1007-3175(2022)01-0008-06
 
Discussion on Short-Circuit Computing Methods for AC/DC Power System
 
DONG Zhe, HE Wei
(School of Automation, Guangdong University of Technology, Guangzhou 510006, China)
 
    Abstract: PSASP and BPA are the commonly used short-circuit calculation programs in China. Even under the same calculation modes and calculation conditions, their computed results could be different. This article analyzed the reasons for this difference by using theoretical analysis and simulation calculations. It focused on the effective value, short-circuit capacity, short-circuits ratio, and effectively short-circuit ratio of the proper computing methods for the short-circuit current in the AC/DC power system. This paper gives two suggestions: when calculating the short-circuit current based on the power flow, the equivalent impedance corresponding to the DC power could be included in the node impedance matrix used in the short-circuit calculation. When calculating the short-circuit ratio and effectively short-circuit ratio indicators.It might be better to use the short-circuit capacity calculation result which was figured out by using the Thevenin equivalent method based on the network-based mode when the converter bus voltage is 1.0 p.u. . The result of this study could help to improve the application of short-circuit calculation theory in power systems.
    Key words: AC/DC power system; power-flow based short-circuit calculation; network-based short-circuit calculation; Thevenin equivalent method; superposition method
 
参考文献
[1] 刘垚,孔力,邓卫,等. 交直流混联系统稳定性分析研究综述[J] . 电工电能新技术,2020,39(9) :36-47.
[2] 文俊,李佳琪,王玲,等.MIDC 输电系统后续换相失败的抑制措施研究[J] . 电工电能新技术,2019,38(4) :79-88.
[3] 王玲,文俊,崔康生,等. 多馈入直流输电系统换相失败研究综述[J] . 电工电能新技术,2017,36(8) :56-65.
[4] 李兴源. 高压直流输电系统的运行和控制[M] . 北京: 科学出版社,1998.
[5] KUNDER P . Power system stability and control[M].Beijing :China Electric Power Press,2002.
[6] 徐政. 交直流电力系统动态行为分析[M] . 北京:机械工业出版社,2004.
[7] 蔡国伟,史一明,杨德友. 一种基于平均交互作用指标的多馈入直流系统落点选取方法[J] . 电工电能新技术,2017,36(3) :1-7.
[8] DE TOLEDO P F, BERGDAHL B, ASPLUND G.Multiple infeed short curcuit ratio-aspects related to multiple HVDC into one AC network[C]//2005 IEEE/PES Transmission and Distribution Conference &Exhibition :Asia and Pacific, 2005.
[9] 刘婷婷,文俊,乔光尧,等. 多馈入直流输电系统谐波相互影响的研究[J] . 电工电能新技术,2016,35(1) :42-47.
[10] 朱林,高琴,蔡泽祥,等. 大容量直流输电系统的受端接入模式比较[J] . 电力建设,2017,38(4) :112-119.
[11] 王铁柱,万磊,卜广全,等. 逆变侧交流系统三相短路时直流系统贡献短路电流的机理和计算方法研究[J]. 电网技术,2016,40(5) :1313-1319.
[12] 何仰赞,温增银. 电力系统分析[M] .3 版. 武汉:华中科技大学出版社,2002.
[13] 姚淑玲,田华. 基于 BPA 和 PSASP 程序的短路电流计算比对[J] . 电力系统自动化,2011,35(14) :112-115.
[14] 董红. 短路电流计算模式的选择[J] . 广东电力,2013,26(12) :53-55.
[15] 叶圣永,程超,唐权,等. 基于 BPA 的短路电流计算模式研究[J] . 电力系统保护与控制,2015,43(18) :138-143.
[16] 田华,王卿,朱峰,等. 基于 PSASP 程序的短路电流计算结果分析比较探讨[J] . 电力系统保护与控制,2010,38(1) :56-60.
[17] 章勇高,李小蓓,方华亮,等.PSASP 与 PSDE-SCCP 短路计算的对比分析研究[J] . 电力系统保护与控制,2019,47(11) :61-70.
[18] IEEE . IEEE guide for planning DC links terminating at AC locations having low shortcircuit capacities:IEEE Std 1204-1997[S].New York :IEEE,1997 :1-6.
[19] University of Cyprus.IEEE 39-bus modified test system[EB/OL].[2020-5-24].https://www2.kios.ucy.ac.cy/testsystems/index.php/ieee-39-bus-modified-test-system.