From fu at ece.msstate.edu Sun Oct 3 21:07:49 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Sun Oct 3 21:07:59 2010 Subject: [ece4643-01] [ece4643] about Homework 6 In-Reply-To: <31050431.174611286157976923.JavaMail.root@zimbra.ece.msstate.edu> Message-ID: <3391396.174631286158069078.JavaMail.root@zimbra.ece.msstate.edu> About Q1 in HW6, the rated line-to-line voltage is 500 kV. For our in-class example, the rated line-to-line voltage is 345 kV. Thanks. Yong ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== ----- Original Message ----- From: "James Evans" To: "Yong Fu" Sent: Sunday, October 3, 2010 8:31:40 PM GMT -06:00 US/Canada Central Subject: Re: [ece4643-01] [ece4643] about Homework 6 Dr. Fu, On problem one of homework 6, are we to assume that VLN = 345KV so that we can obtain Z prime? The value of VLN isn't given and that is what we used on the in-class example. Thank you so much, James Evans From fu at ece.msstate.edu Tue Oct 5 13:57:58 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Tue Oct 5 13:58:10 2010 Subject: [ece4643-501] Re: [ece4643-01] [ece4643] about Homework 6 In-Reply-To: Message-ID: <6535887.178681286305078157.JavaMail.root@zimbra.ece.msstate.edu> In class 17 on 9/27/10 in example 2 at the end of part b, We need compare Z' =13.28@8.19 deg. with Zone 1, Zone 2, Zone 3 settings. We found that Z' is greater than these individual settings. So, the relay does not operate to trip the break circuit under this emergency situation since Z' is at outside impedance circles. Thanks, Yong ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== ----- Original Message ----- From: "John Mansell" To: "Yong Fu" Sent: Tuesday, October 5, 2010 10:13:16 AM GMT -06:00 US/Canada Central Subject: Re: [ece4643-501] Re: [ece4643-01] [ece4643] about Homework 6 Dr. Fu, In class 17 on 9/27/10 in example 2 at the end of part b.) "when we compare Z' =13.28 ? 18.19 with zone 1, 2, 3, settings this value is less than them during emergency load can not operate", are you taking the sum of Zr1, Zr2, and Zr3. Z' is greater than these individual settings by themselves. Thanks, John Mansell On Sun, Oct 3, 2010 at 9:07 PM, Yong Fu < fu@ece.msstate.edu > wrote: About Q1 in HW6, the rated line-to-line voltage is 500 kV. For our in-class example, the rated line-to-line voltage is 345 kV. Thanks. Yong ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== ----- Original Message ----- From: "James Evans" < jhe14@msstate.edu > To: "Yong Fu" < fu@ece.msstate.edu > Sent: Sunday, October 3, 2010 8:31:40 PM GMT -06:00 US/Canada Central Subject: Re: [ece4643-01] [ece4643] about Homework 6 Dr. Fu, On problem one of homework 6, are we to assume that VLN = 345KV so that we can obtain Z prime? The value of VLN isn't given and that is what we used on the in-class example. Thank you so much, James Evans _______________________________________________ ece4643 mailing list ece4643@ece.msstate.edu http://www.ece.msstate.edu/mailman/listinfo/ece4643 _______________________________________________ ece4643-501 mailing list ece4643-501@ece.msstate.edu http://www.ece.msstate.edu/mailman/listinfo/ece4643-501 From fu at ece.msstate.edu Wed Oct 6 13:32:56 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Wed Oct 6 13:33:07 2010 Subject: [ece4643] about HW5 solution Message-ID: <13871066.181971286389976478.JavaMail.root@zimbra.ece.msstate.edu> Dear All, Everyone who submitted HW5 can get 10 marks this time, . I uploaded the HW5 solution on our class website, https://sites.google.com/site/powersystemrelayingandcontrol/home Please review it. Thanks. Yong ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== From fu at ece.msstate.edu Wed Oct 6 13:54:17 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Wed Oct 6 13:54:28 2010 Subject: [ece4643-01] [ece4643] about HW5 solution In-Reply-To: Message-ID: <30837388.182061286391257911.JavaMail.root@zimbra.ece.msstate.edu> Q1 of HW5 is: "Please use the twice maximum load current to select the secondary pick up current for each time-delay overcurrent relay". So, 2*4.5=9.0. Right? Yong ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== ----- Original Message ----- From: "Uttam Adhikari" To: "Yong Fu" Sent: Wednesday, October 6, 2010 1:44:32 PM GMT -06:00 US/Canada Central Subject: Re: [ece4643-01] [ece4643] about HW5 solution Dr. Fu I am going through the solution of homework 5. We were given the different values for the maximum load current (I.e. each load is 4.5 MVA) but i think solution is based on different value (9MVA). Is it the solution for homework 5 or similar solution (I m confused if i missed some steps in between). thank you Regards Uttam Adhikari On Wed, Oct 6, 2010 at 1:32 PM, Yong Fu < fu@ece.msstate.edu > wrote: Dear All, Everyone who submitted HW5 can get 10 marks this time, . I uploaded the HW5 solution on our class website, https://sites.google.com/site/powersystemrelayingandcontrol/home Please review it. Thanks. Yong ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== _______________________________________________ ece4643 mailing list ece4643@ece.msstate.edu http://www.ece.msstate.edu/mailman/listinfo/ece4643 _______________________________________________ ece4643-01 mailing list ece4643-01@ece.msstate.edu http://www.ece.msstate.edu/mailman/listinfo/ece4643-01 -- Uttam Adhikari Graduate Research Assistant Center For Advanced Vehicular System(CAVS) Mississippi State University, MS 39762 From fu at ece.msstate.edu Wed Oct 6 15:00:52 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Wed Oct 6 15:01:04 2010 Subject: [ece4643-01] [ece4643] about HW5 solution In-Reply-To: Message-ID: <4931175.182421286395252633.JavaMail.root@zimbra.ece.msstate.edu> You don't need submit again. Thanks. Yong ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== ----- Original Message ----- From: "Sundari Ramabhotla" To: "Yong Fu" Sent: Wednesday, October 6, 2010 2:51:35 PM GMT -06:00 US/Canada Central Subject: Re: [ece4643-01] [ece4643] about HW5 solution Hello Professor Fu, I got my HW-5 but it was not corrected. Do I need to resubmit again? Thank you On Wed, Oct 6, 2010 at 1:32 PM, Yong Fu < fu@ece.msstate.edu > wrote: Dear All, Everyone who submitted HW5 can get 10 marks this time, . I uploaded the HW5 solution on our class website, https://sites.google.com/site/powersystemrelayingandcontrol/home Please review it. Thanks. Yong ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== _______________________________________________ ece4643 mailing list ece4643@ece.msstate.edu http://www.ece.msstate.edu/mailman/listinfo/ece4643 _______________________________________________ ece4643-01 mailing list ece4643-01@ece.msstate.edu http://www.ece.msstate.edu/mailman/listinfo/ece4643-01 -- Regards, Sundari. From fu at ece.msstate.edu Sat Oct 23 18:23:47 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Sat Oct 23 18:23:58 2010 Subject: [ece4643] Re: Today's lecture In-Reply-To: Message-ID: <27048907.3141287876227301.JavaMail.root@zimbra.ece.msstate.edu> Dear All, Sorry for my delayed upload. Please find our homework from the website https://sites.google.com/site/powersystemrelayingandcontrol/home Thanks. Yong ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== ----- Original Message ----- From: "John Mansell" To: "Yong Fu" Sent: Saturday, October 23, 2010 11:01:46 AM GMT -06:00 US/Canada Central Subject: Re: Today's lecture Also, if there are any home problems I can not see them either. On Fri, Oct 22, 2010 at 10:18 PM, John Mansell < jm397@msstate.edu > wrote: Yes I am having the same problem. On Fri, Oct 22, 2010 at 8:37 PM, Yong Fu < fu@ece.msstate.edu > wrote: ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== Hansel and John, Do you have same problem Elizabeth met? I will prepare a note for you and mention key points on next Class. Yong ----- Original Message ----- From: "Elizabeth Bray" < ebb88@msstate.edu > To: "Yong Fu" < fu@ece.msstate.edu > Sent: Friday, October 22, 2010 1:44:01 PM GMT -06:00 US/Canada Central Subject: Today's lecture I'm watching today's class and there is no audio. Is this just me? It's the whole video. I can follow the example but not anything else that was covered. Am I missing any important comments that you made in class today? Thanks Elizabeth Sent from my iPhone On Oct 6, 2010, at 11:09 PM, Yong Fu < fu@ece.msstate.edu > wrote: > I have sent the midterm exam to your proctor. Please find a proper time for the exam, and then scan and email me all answers by this Friday (10/08/2010) 5:00 PM? > > This exam is closed-book and closed-note. Only one equation sheet is allowed, but no words, no figures. You have 50 minutes to work on the exam. > > Do let me know if any question comes up. > > Thanks, > > Yong > ==================================================== > Yong Fu, Ph.D. > Assistant Professor > Department of Electrical and Computer Engineering > Mississippi State University > > Room 239 Simrall Bldg. > 406 Hardy Rd., P.O. Box 9571 > Mississippi State, MS 39762 > Phone: 662-325-3878 > Fax: 662-325-2298 > Homepage: http://www.ece.msstate.edu/~fu > ==================================================== From fu at ece.msstate.edu Sun Oct 24 14:17:49 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Sun Oct 24 14:18:00 2010 Subject: [ece4643-501] [ece4643] Re: Today's lecture In-Reply-To: Message-ID: <15189588.4111287947869639.JavaMail.root@zimbra.ece.msstate.edu> Yes. You are right. Thanks. Yong ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== ----- Original Message ----- From: "Hansel Beckford" To: "Yong Fu" Sent: Sunday, October 24, 2010 2:06:11 PM GMT -06:00 US/Canada Central Subject: Re: [ece4643-501] [ece4643] Re: Today's lecture Dr. Fu: Is hw #7 due this Wednesday, Oct 27th? Hansel. On Sat, Oct 23, 2010 at 7:23 PM, Yong Fu < fu@ece.msstate.edu > wrote: Dear All, Sorry for my delayed upload. Please find our homework from the website https://sites.google.com/site/powersystemrelayingandcontrol/home Thanks. Yong ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== ----- Original Message ----- From: "John Mansell" < jm397@msstate.edu > To: "Yong Fu" < fu@ece.msstate.edu > Sent: Saturday, October 23, 2010 11:01:46 AM GMT -06:00 US/Canada Central Subject: Re: Today's lecture Also, if there are any home problems I can not see them either. On Fri, Oct 22, 2010 at 10:18 PM, John Mansell < jm397@msstate.edu > wrote: Yes I am having the same problem. On Fri, Oct 22, 2010 at 8:37 PM, Yong Fu < fu@ece.msstate.edu > wrote: ==================================================== Yong Fu, Ph.D. Assistant Professor Department of Electrical and Computer Engineering Mississippi State University Room 239 Simrall Bldg. 406 Hardy Rd., P.O. Box 9571 Mississippi State, MS 39762 Phone: 662-325-3878 Fax: 662-325-2298 Homepage: http://www.ece.msstate.edu/~fu ==================================================== Hansel and John, Do you have same problem Elizabeth met? I will prepare a note for you and mention key points on next Class. Yong ----- Original Message ----- From: "Elizabeth Bray" < ebb88@msstate.edu > To: "Yong Fu" < fu@ece.msstate.edu > Sent: Friday, October 22, 2010 1:44:01 PM GMT -06:00 US/Canada Central Subject: Today's lecture I'm watching today's class and there is no audio. Is this just me? It's the whole video. I can follow the example but not anything else that was covered. Am I missing any important comments that you made in class today? Thanks Elizabeth Sent from my iPhone On Oct 6, 2010, at 11:09 PM, Yong Fu < fu@ece.msstate.edu > wrote: > I have sent the midterm exam to your proctor. Please find a proper time for the exam, and then scan and email me all answers by this Friday (10/08/2010) 5:00 PM? > > This exam is closed-book and closed-note. Only one equation sheet is allowed, but no words, no figures. You have 50 minutes to work on the exam. > > Do let me know if any question comes up. > > Thanks, > > Yong > ==================================================== > Yong Fu, Ph.D. > Assistant Professor > Department of Electrical and Computer Engineering > Mississippi State University > > Room 239 Simrall Bldg. > 406 Hardy Rd., P.O. Box 9571 > Mississippi State, MS 39762 > Phone: 662-325-3878 > Fax: 662-325-2298 > Homepage: http://www.ece.msstate.edu/~fu > ==================================================== _______________________________________________ ece4643 mailing list ece4643@ece.msstate.edu http://www.ece.msstate.edu/mailman/listinfo/ece4643 _______________________________________________ ece4643-501 mailing list ece4643-501@ece.msstate.edu http://www.ece.msstate.edu/mailman/listinfo/ece4643-501