Robust Convergence of Power Flow Using TX Stepping Method with Equivalent Circuit Formulation
Robust Convergence of Power Flow Using TX Stepping Method with Equivalent Circuit Formulation
复制标题
使用 TX 步进方法和等效电路公式实现功率流的鲁棒收敛
DOI：
10.23919/pscc.2018.8442680
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
L. Pileggi
中科院分区：
文献类型：
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作者：
Amritanshu Pandey;Marko Jereminov;Martin R. Wagner;G. Hug;L. Pileggi
关键大功率潮流情况（具有50k或更多总线）的稳健解决方案构成了任何大型互联电网规划和运营的支柱。目前，可靠的收敛与现有的潮流工具的应用程序，大型电力系统是偶然的一个很好的初始猜测系统状态。为了使鲁棒收敛的大规模系统开始与任意的初始猜测，我们扩展我们的等效电路公式的潮流分析，包括一种新的连续方法的基础上传输线（“Tx”）步进。虽然已经提出了各种连续的方法与传统的“PQV”潮流公式，这些方法要么未能完全解决这个问题，或导致收敛到一个低电压的解决方案。本文提出的“Tx步进”方法证明了从任意初始猜测到高电压解的鲁棒收敛。示例系统，包括75k+总线测试情况下，代表不同的负载和操作条件的东部互联的美国电网，从任意的初始猜测解决。
Robust solving of critical large power flow cases (with 50k or greater buses) forms the backbone of planning and operation of any large connected power grid. At present, reliable convergence with applications of existing power flow tools to large power systems is contingent upon a good initial guess for the system state. To enable robust convergence for large scale systems starting with an arbitrary initial guess, we extend our equivalent circuit formulation for power flow analysis to include a novel continuation method based on transmission line (‘Tx’) stepping. While various continuation methods have been proposed for use with the traditional ‘PQV’ power flow formulation, these methods have either failed to completely solve the problem or have resulted in convergence to a low voltage solution. The proposed “Tx Stepping” method in this paper demonstrates robust convergence to the high voltage solution from an arbitrary initial guess. Example systems, including 75k+ bus test cases representing different loading and operating conditions for Eastern Interconnection of the U.S. power grid, are solved from arbitrary initial guesses.