A synchronous motor draws 20 MW (power factor = 0.8 leading). The motor's terminal voltage is...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
A synchronous motor draws 20 MW (power factor = 0.8 leading). The motor's terminal voltage is 12.8 kV. Determine the sub-transient current from the generator, motor, and fault when a three-phase fault occurs at the motor's terminal (see diagram below). Assume Sbase = 30 MVA & Vbase = 13.2 kV. (Hint: 1. calculate all per unit quantities, 2. calculate all internal voltages prior to the fault, and 3. solve the circuit during the fault). j0.20 Eg Of Synchronous Generator S = 30 MVA V = 13.2 kV X" = 0.20 pu +₂ IL j0.10 m Vt Prior to fault x = 0.10 pu j0.20 Em line HO j0.20 Eg" Synchronous Motor S = 30 MVA V = 13.2 kV X" = 0.20 pu j0.10 During fault Imf j0.20 Em A synchronous motor draws 20 MW (power factor = 0.8 leading). The motor's terminal voltage is 12.8 kV. Determine the sub-transient current from the generator, motor, and fault when a three-phase fault occurs at the motor's terminal (see diagram below). Assume Sbase = 30 MVA & Vbase = 13.2 kV. (Hint: 1. calculate all per unit quantities, 2. calculate all internal voltages prior to the fault, and 3. solve the circuit during the fault). j0.20 Eg Of Synchronous Generator S = 30 MVA V = 13.2 kV X" = 0.20 pu +₂ IL j0.10 m Vt Prior to fault x = 0.10 pu j0.20 Em line HO j0.20 Eg" Synchronous Motor S = 30 MVA V = 13.2 kV X" = 0.20 pu j0.10 During fault Imf j0.20 Em
Expert Answer:
Related Book For
Posted Date:
Students also viewed these computer network questions
-
An Australian exporter has supplied goods to India and will receive 2 million Indian rupees (INR) in one year. The exporter expects that the INR will be selling at 11.53% discount against the...
-
TIM produces and sells two products, the MK and the KL. The organisation expects to sell 2 MK for every 2 KLs and have monthly sales revenue of GHe150,000. The MK has a C/S ratio of 20% whereas the...
-
The accountant for a subunit of Mountain Sports Company went on vacation before completing the subunits monthly performance report. This is as far as she got: Requirements 1. Complete the performance...
-
Two tightly wound solenoids have the same length and circular cross-sectional area. But solenoid 1uses wire that is half as thick as solenoid 2. (a) What is the ratio of their inductances? (b)What is...
-
Dana Company reported the following amounts in the shareholders equity' section of its December 31, 2015, balance sheet: Preferred stock, 9%, $100 par (10,000 shares authorized, 1,000 shares issued)...
-
Using an incremental internal rate of return (IRR) analysis, the decision to replace the "current best" by the "challenger"' is based on what decision rule? a. The internal rate of return of the...
-
The Scottsville Textile Mill1 produces five different fabrics. Each fabric can be woven on one or more of the mills 38 looms. The sales departments forecast of demand for the next month is shown in...
-
Pioneer Inc. wants to invest $557,302 today. The expected returns in years 1, 2, and 3 are $247,615, $180,383, and $335,481, respectively. If the rate of return on investment must be at least 14%,...
-
Use Solver to create Answer and Sensitivity Reports for question 15 at the end of Chapter 2 and answer the following questions: a. How much excess wiring and testing capacity exists in the optimal...
-
A company starts work on 1 000 physical units and completes 75 percent of conversion activity. The costs are $1 500 for conversion and $5 000 for direct material. What is the cost per equivalent unit...
-
Edward started a business as a primary producer in Year 1. Trading results until the current year are as follows: Year ended 30 June Trading profit $ Year 1 Profit 8,000 Year 2 Profit 6,000 Year 3...
-
John purchased 300 shares of Big Trouble common stock at $26.75 a share in July of 2015. In June of 2016 John buys 3 October 35 puts at 3. If the market of Big Trouble is trading at $33.16 at...
-
The cash flows associated with an investment project are an immediate cost of $1000 and benefits of $1800 in one year, $1400 in two years, and $1400 in three years. The cost of capital (WACC) is 10%....
-
The following information pertains to Alpha Projects for the quarter ended 31 December: Actual Budgeted November December October R R R Invoices (20% for cash and 80% on credit) 360 000 380 000 400...
-
Brandy Corporation, a calendar-year, accrual-basis taxpayer, signed a contract on December 27, 20X1, for the installation of a new central air conditioning unit. Because of various shipping delays,...
-
The Beer?s Law plot is one of the most useful for a quantitative analytical chemist. Examine the following Beer?s Law plot. a. What chemical and physical reasons (there are both) cause the...
-
How can NAFTA be beneficial to suppliers of Walmart?
-
The armature of a two-pole dc generator has a total of 320 series turns. When operated at a speed of 1800r/min, the open-circuit generated voltage is 240 V. Calculate p, the air-gap flux per pole.
-
The nameplate on a 7.97-kV: 460-V, 75-kVA, single-phase transformer indicates that it has a series reactance of 12 percent (0.12 per unit). a. Calculate the series reactance in ohms as referred to...
-
A three-phase Y- transformer is rated 225-kV: 24-kV, 400 MVA and has a series reactance of 11.7 as referred to its high-voltage terminals. The transformer is supplying a load of 325 MVA, with 0.93...
-
In Problem 102, with an interest rate of 6 percent, what increasing gradient series is equivalent to the cash flow profile shown if the gradient series sought has a value of X at EOY = 1 and a value...
-
In Problem 106, what uniform annual series over [4,7] will be equivalent to the cash flow profile if money is worth 6 percent compounded annually? Data from problem 106 Consider the following cash...
-
A series of 10 end-of-year deposits is made that begins with $7,000 at the end of year 1 and decreases at the rate of $300 per year with 10 percent interest. a. What amount could be withdrawn at t =...
Study smarter with the SolutionInn App