From fu at ece.msstate.edu Tue Mar 2 18:18:41 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Tue Mar 2 18:18:53 2010 Subject: [ece4633] Re: 9.1 In-Reply-To: <27690441.85791267575263456.JavaMail.root@zimbra.ece.msstate.edu> Message-ID: <4797404.85811267575521993.JavaMail.root@zimbra.ece.msstate.edu> For the positive one, it is same as the single-line diagram for the normal condition. For the negative one, it is same as the positive one, just short circuit the power sources. For the zero one, it is a little bit difficult. You need think which equipment has no zero sequence current considering Y with/without grounding and delta connections. 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: "Ashley Stough" To: "Yong Fu" Sent: Tuesday, March 2, 2010 6:04:18 PM GMT -06:00 US/Canada Central Subject: Re: 9.1 I'm at work. Will not get off until late. I just had a little break and was trying to finish up these problems. Thanks, Ashley On Tue, Mar 2, 2010 at 6:02 PM, Yong Fu < fu@ece.msstate.edu > wrote: Sure. I am in my office now. Where are you? Otherwise, try your best first. I will discuss this problem in our class. 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: "Ashley Stough" < ashleystough21@gmail.com > To: "Yong Fu" < fu@ece.msstate.edu > Sent: Tuesday, March 2, 2010 5:52:10 PM GMT -06:00 US/Canada Central Subject: 9.1 Dr. Fu, I'm trying to figure out problem 9.1. For the drawing of the zero, positive, and negative sequence networks, I am confused. I understand it well enough for problems like example 9.1, but I don't understand how to do the more complex problem. Can you please help me understand or direct me to an example that could help me? Thanks, Ashley From fu at ece.msstate.edu Wed Mar 3 12:09:00 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Wed Mar 3 12:09:09 2010 Subject: [ece4633] about ECE4633_6633 homework In-Reply-To: <11935296.88031267639410157.JavaMail.root@zimbra.ece.msstate.edu> Message-ID: <6595212.88101267639740018.JavaMail.root@zimbra.ece.msstate.edu> All, Please use the general Y-Delta conversion attached for your homework. You are encouraged to use a different way to get the same answer. Today's homework is 9.13, 9.14, 9.15. You need get the fault current and voltage. Any questions, feel free to let me know. 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 ==================================================== -------------- next part -------------- A non-text attachment was scrubbed... Name: Y_Delta Conversion.PDF Type: application/pdf Size: 9906 bytes Desc: not available Url : http://www.ece.msstate.edu/pipermail/ece4633/attachments/20100303/622c1f4d/Y_DeltaConversion-0001.pdf From fu at ece.msstate.edu Wed Mar 3 13:48:49 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Wed Mar 3 13:48:59 2010 Subject: [ece4633] about ECE4633_6633 homework Message-ID: <31108984.88251267645729106.JavaMail.root@zimbra.ece.msstate.edu> All, Sorry for my mistake in the previous email. Today's homework is 9.13, 9.15, 9.16. You need get the fault current and voltage. 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 Fri Mar 5 11:52:08 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Fri Mar 5 12:21:51 2010 Subject: [ece4633] about ece4633_6633 solution In-Reply-To: <20635678.94111267811433732.JavaMail.root@zimbra.ece.msstate.edu> Message-ID: <23274803.94131267811528327.JavaMail.root@zimbra.ece.msstate.edu> All, For your convenience, attached please find the solution to problems 9.1, 9.2 and 9.3. 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 ==================================================== -------------- next part -------------- A non-text attachment was scrubbed... Name: Solution 7.PDF Type: application/pdf Size: 71805 bytes Desc: not available Url : http://www.ece.msstate.edu/pipermail/ece4633/attachments/20100305/11524049/Solution7-0001.pdf From fu at ece.msstate.edu Mon Mar 8 15:09:11 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Mon Mar 8 15:09:21 2010 Subject: [ece4633] about ECE 4633_6633 solution and note Message-ID: <16436160.101941268082551520.JavaMail.root@zimbra.ece.msstate.edu> All, Please download our solutions and notes. 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 Tue Mar 9 17:52:30 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Tue Mar 9 17:52:39 2010 Subject: [ece4633] ECE4633_6633 Tomorrow's class is cancelled Message-ID: <1144756.107541268178750388.JavaMail.root@zimbra.ece.msstate.edu> All, I got a sick. So, I am sorry I have to cancel our tomorrow?s class. I have posted the Solution 8 on our class website. If you have any questions for the exam, feel free to send me email or stop by my office. 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 Thu Mar 11 09:57:29 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Thu Mar 11 09:58:24 2010 Subject: [ece4633] about ece4633_6633 midterm exam In-Reply-To: <31729501.114791268323023528.JavaMail.root@zimbra.ece.msstate.edu> Message-ID: <9478613.114811268323049798.JavaMail.root@zimbra.ece.msstate.edu> All, Attached please find the solution. For tomorrow?s exam, you can bring one-page formulations only. No Figures, No words, No sentences. No homework due tomorrow. Any questions, let me know. 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 ==================================================== -------------- next part -------------- A non-text attachment was scrubbed... Name: Solution.PDF Type: application/pdf Size: 17450 bytes Desc: not available Url : http://www.ece.msstate.edu/pipermail/ece4633/attachments/20100311/faa77984/Solution-0001.pdf From fu at ece.msstate.edu Thu Mar 11 14:21:43 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Thu Mar 11 14:21:53 2010 Subject: [ece4633] Re: doubt In-Reply-To: Message-ID: <9758330.115971268338903584.JavaMail.root@zimbra.ece.msstate.edu> It is better to know. But, don't need prepare it for the exam. 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: "Naveen Kumar Chanda" To: "Yong Fu" Sent: Thursday, March 11, 2010 2:05:21 PM GMT -06:00 US/Canada Central Subject: re: doubt Dr.Fu, I have a doubt. do we need to study the example 9.6 in the text book -- Thanking You, Naveen Kumar Chanda Research Assistant Power Systems Laboratory Mississippi State University Ph# 6626172242 From fu at ece.msstate.edu Thu Mar 11 14:42:50 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Thu Mar 11 14:42:59 2010 Subject: [ece4633] about ece4633_6633 midterm exam Message-ID: <19632335.116121268340170892.JavaMail.root@zimbra.ece.msstate.edu> All, For your preparation, you must know how to draw sequence networks (0, 1, 2), how to connect three sequence networks for any fault type, how to get fault currents and voltages. Do a good job please. 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 Mar 24 11:47:36 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Wed Mar 24 11:47:45 2010 Subject: [ece4633] about ece4633_6633 homework In-Reply-To: <5743063.148871269449219683.JavaMail.root@zimbra.ece.msstate.edu> Message-ID: <20394199.148891269449256028.JavaMail.root@zimbra.ece.msstate.edu> All, If you didn?t bring your homework (9.36, 9.37, 9.38, 9.39), please turn in this Friday (3/26). 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 Tue Mar 30 09:27:25 2010 From: fu at ece.msstate.edu (Yong Fu) Date: Tue Mar 30 13:09:30 2010 Subject: [ece4633] Re: 13.8 In-Reply-To: <30300940.1071269959218754.JavaMail.root@zimbra.ece.msstate.edu> Message-ID: <15210263.1091269959245875.JavaMail.root@zimbra.ece.msstate.edu> All, Please check the attachment to find some ideas. Any questions, let me know. 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: "Ashley Stough" To: "Yong Fu" Sent: Monday, March 29, 2010 10:53:12 PM GMT -06:00 US/Canada Central Subject: 13.8 Dr. Fu, I'm attempting to work problem 13.8. I was checking my answer to the first part and had it incorrect. Where does the formula I= (Vt - Vbus)/ jX come from? I do not see it in the text. I was trying to use the formula in Example 13.3. Thanks, Ashley -------------- next part -------------- A non-text attachment was scrubbed... Name: P13_8.PDF Type: application/pdf Size: 14747 bytes Desc: not available Url : http://www.ece.msstate.edu/pipermail/ece4633/attachments/20100330/76623a08/P13_8-0001.pdf