?Thank you for the response. My doubt is cleared.
Thanks, Vishnu Priya. ________________________________ From: [email protected] <[email protected]> on behalf of Ray Zimmerman <[email protected]> Sent: Friday, February 28, 2014 10:37 PM To: MATPOWER discussion forum Subject: Re: Doubts in test_se file in state-estimation The measurements are inputs. They are not derived from any other data related to the case. My guess is that the creator of test_se_14bus.m took values from a solved power flow case and added some noise to them to "create" measurement data to use as inputs to the state estimation problem. -- Ray Zimmerman Senior Research Associate B30 Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Feb 25, 2014, at 11:53 PM, Vishnu Priya K P(MT2012164) <[email protected]<mailto:[email protected]>> wrote: Yes Sir, Thanks for the help. To be more clear, I am not able to understand where are those measurements in measure variables coming from? I checked with the generator data for PG and QG and bus data for Vm and Va and branch data for the rest. The data in those generator, bus and branch from the case file of the ieee14 bus system does not match with the idx and measure variables in state estimation file. Is the data in test_se_14bus.m file not obtained from the case14.m? If not can you let me know where it is obtained or is it just a sample data that is used for state estimation to compute z_est and compare with original measurements. Thanks, Vishnu Priya ?Master's student, IIIT-Bangalore. ________________________________ From: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> on behalf of Ray Zimmerman <[email protected]<mailto:[email protected]>> Sent: Wednesday, February 19, 2014 1:05 AM To: MATPOWER discussion forum Subject: Re: Doubts in test_se file in state-estimation I'm not sure I understand your question? While I didn't write this code, my understanding is that the idx and measure variables are what you use to specify the quantities that you have measurements for. The state estimation problem finds the state of the system (set of bus voltages) that result in the closest match to the measured quantities. -- Ray Zimmerman Senior Research Associate B30 Warren Hall, Cornell University, Ithaca, NY 14853 phone: (607) 255-9645 On Feb 17, 2014, at 2:02 AM, Vishnu Priya K P(MT2012164) <[email protected]<mailto:[email protected]>> wrote: Dear Sir, I am working on state estimation in Matpower. I have to analyze the state estimation for 39 bus system for different algorithms. In the test_se file in this path \matpower4.1\extras\se?, where does the eight idx measurements come from? Are these measurements taken after the powerflow or directly from the bus and generator details before the powerflow? Can you please guide me on which file is used to obtain those details. Thanks, Vishnu Priya International Institute of Information Technology India
