8. When the frequency on the grid changes the initial response comes from the rotating energy...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
8. When the frequency on the grid changes the initial response comes from the rotating energy stored in all rotors on the grid. The rotational energy for a spinning body is Ekin w Jmech 2 (1) where J is the moment of inertia in kgm, and wmech is the mechanical angular speed. Assume a 58 MW machine with 12 pole pairs has a moment of inertia of 590'000 kgm. If the electrical frequency drops with a value of 0.05 Hz in 4 seconds calculate the power the change in frequency adds to the grid during the 4 seconds if we assume that the turbine power is constant, and that the frequency falls linearly. 8. When the frequency on the grid changes the initial response comes from the rotating energy stored in all rotors on the grid. The rotational energy for a spinning body is Ekin w Jmech 2 (1) where J is the moment of inertia in kgm, and wmech is the mechanical angular speed. Assume a 58 MW machine with 12 pole pairs has a moment of inertia of 590'000 kgm. If the electrical frequency drops with a value of 0.05 Hz in 4 seconds calculate the power the change in frequency adds to the grid during the 4 seconds if we assume that the turbine power is constant, and that the frequency falls linearly.
Expert Answer:
Answer rating: 100% (QA)
The question is asking us to calculate the power delivered to the grid due to the change in rotational energy of a 58 MW machine with 12 pole pairs as ... View the full answer
Related Book For
University Physics with Modern Physics
ISBN: 978-0133977981
14th edition
Authors: Hugh D. Young, Roger A. Freedman
Posted Date:
Students also viewed these mechanical engineering questions
-
Let A, B be sets. Define: (a) the Cartesian product (A B) (b) the set of relations R between A and B (c) the identity relation A on the set A [3 marks] Suppose S, T are relations between A and B, and...
-
can someone solve this Modern workstations typically have memory systems that incorporate two or three levels of caching. Explain why they are designed like this. [4 marks] In order to investigate...
-
The following are selected transactions of Sarasota Department Store Ltd. for the current year ended December 31. Sarasota is a private company operating in the province of Manitoba where PST is 8%...
-
Figure 24.12 illustrates Michelson's setup for measuring the speed of light with the mirrors placed on Mt. San Antonio and Mt. Wilson in California, which are 35 km apart. Using a value of 3.00...
-
A neat trick for determining whether or not a train is coming is to press your ear to a railroad track. Why is this much more effective than listening for the train's sound carried by air?
-
Berkley Corp. wanted to buy 1,000 customized umbrellas imprinted with their logo to use for promotional purposes. It planned to use 250 of the umbrellas for an event scheduled for early February 2012...
-
On December 31, 2016, the ledger of Hernandez Company contained the following account balances: All the accounts have normal balances. Journalize the closing entries. Use 4 as the general journal...
-
18.A sine wave is travelling in a medium. The minimum distance between the two particles, always having same speed, is (1) (2)
-
Jarlsberg cheese (www.jarlsberg.com) has been well received in the US. Nearly 60 years after entering the US it is now the imported cheese with the biggest market share of its category (Swiss-like...
-
Compensation Report for the Year 2020 1. HR Manager Salary: 60,000 2. Bonus: 4% of annual salary 3. Paid Time Off: 20 days per year 4. Public Holidays recognized: 11 days 5. Benefits: 1. Health...
-
What is the product margin under the traditional costing system when the number of orders increases to 24?
-
A bank operate savings account as per following condition: Savings accounts have a customer id, balance, and overdraft amount. A customer can withdraw an amount of money from the account, but only if...
-
What is the difference between HTML and XML, how can attackers make use of XML to attack a server?
-
(a) Select the reaction energy profile below that would represent the reaction of HBr with: (i) alcohol HORred at 80C ---Select--- (ii) alcohol HORblue at room temperature ---Select--- (b) Draw the...
-
How the student allocated appointments appropriately in accordance with workplace requirements?
-
The product we have chosen to make are customized homemade throw pillows. To start producing the amount of money it would take is $15 to gather all the materials and to produce 3 pillows. If we sell...
-
The figure shows six containers, each of which is filled from the top. Assume that water is poured into the containers at a constant rate and each container is filled in 10 seconds. Assume also that...
-
Let A(Vector) represent any nonzero vector. Why is A(Vector)/A a unit vector, and what is its direction? If is the angle that A(Vector) makes with the +x-axis, explain why (A(Vector) /A) i is...
-
The nucleus of a gold atom contains 79 protons. How does the energy required to remove a 1s electron completely from a gold atom compare with the energy required to remove the electron from the...
-
Example 13.2 (Section 13.1) shows that the acceleration of each sphere caused by the gravitational force is inversely proportional to the mass of that sphere. So why does the force of gravity give...
-
See the option quote on IBM from the CBOE Web site on the next page showing options expiring in March and April 2022. a. Which option contract had the most trades that day? b. Which option contract...
-
Two European call options with a strike price of \($50\) are written on two different stocks. Suppose that tomorrow, the low-volatility stock will have a price of \($50\) for certain. The...
-
It is February 21, 2022, and you have decided to purchase 10 June call contracts on eBays stock with an exercise price of \($57.50.\) Because you are buying, you must pay the ask price. How much...
Study smarter with the SolutionInn App