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I am using an IEEE 39 bus system for my purposes.i need to chage system configuration ,like removing buses and lines for my study and require to calculate The Zbus matrix after each step...I know i can export The Ybus matrix and manipulate it o create zbus in MATLAB by inverting ,but since i am changing network configuration in many steps which lead to some intermediate buses disconnected,now when i export the Ybus matrix and invert it,it becomes infinity as many complete rows has become zero..So can u help me construct Zbus matrix at each step? Is there any way bus renumbering feature can help me here to avoid full rows of in YBUS matrix...If so how can i do without manually creating the bus translation file in each step? I know nothing about Python.