Identify & explain any two difficulties faced while connecting WPP to the power grid.

Identify & explain any two difficulties faced while connecting WPP to the power grid.
by

1 Answer

Answer :

Difficulties Faced while Connecting WPP to Power Grid: There are several technical issues associated with grid connected systems like power quality issues, power and voltage fluctuations, storage, protection issues, harmonics and frequency fluctuations.

1. Short Circuit Power Control: An electric fault in power system can be defined as short circuit in the system. Short circuit power is one of the indicator of capacity of WPP production which can be connected to the grid. Usual practice is that the installed capacity of WPP should be about 10% of short circuit power. If the short circuit power is high then voltage variation at connection point is low and vice a versa. During and after fault in the system, behavior of WPP is different than conventional plants. Which use synchronous generator. If the large number of WPPs are tripped due to fault, the negative effect of fault are magnified. This will affect the transmission capacities in the areas with significant of wind power.

2. Reactive Power Control: Reactive power is exchange of wind stored in capacitive and inductive components of power system. Each WPP should behave like a other conventional plants. The exchange of reactive power is zero. WPP with reactive power control capacity have pf within ±095 over entire operating range of WPP. WPP are connected at weak points in the network and reactive power losses are considerable and are not able to provide contribution in reactive power balance. 

3. Harmonics: Harmonics are current or voltage with frequency that are integer multiplies of fundamental power frequency. Electrical appliances and generators all produce harmonics and large volumes, can cause interference that results in number of power quality problems. 4. Voltage fluctuations: Inverter are generally configured to operate in grid ‘voltage-following’ mode and to disconnect DG when the grid voltage moves outside set parameters. This is both to help ensure they contribute suitable power quality as well as help to protect against unintentional islanding. Where there are large of DG systems on particular feeder, their automatic disconnection due grid voltage being out of range can be problematic because other generators on network will suddenly have to provide additional power. 

5. Power factor correction: Because of poor power factor line losses increases and voltage regulation more difficult. Inverters configured to be voltage following have unity power factor, while inverters are in voltage regulating mode provide current that is out of phase with grid voltage and so provide power factor correction.

by

Related questions

Identify any two weekly maintenance activities for WPP.

Description : Identify any two weekly maintenance activities for WPP.

Last Answer : Weekly Maintenance Activities: Routine checkup, monitoring, periodic reports. Blade cleaning. Higher voltage equipment maintenance. Turbines require periodic lubrication, oil changes. Bolt and electrical ... . Machine should be checked for corrosion. Check guy wire for proper tension.

Recommend & explain with neat sketch a suitable braking mechanism for the large WPP.

Description : Recommend & explain with neat sketch a suitable braking mechanism for the large WPP.

Last Answer : Braking Mechanism For The Large WPP: 1. Furling Mechanism: Furling allows the whole set of blades to change its position and blades turned away from wind, if wind speed is beyond safety limit. It ... 1.To harness optimum power from wind 2.To protect turbine in case of high wind speed.

Explain scheduled maintenance of Stall Pitch, Active Pitch controlled of WPP.

Description : Explain scheduled maintenance of Stall Pitch, Active Pitch controlled of WPP.

Last Answer : Scheduled Maintenance of Stall Pitch: In scheduled maintenance of stall pitch, following maintenance activities are performed quarterly or yearly basis: 1. Grease the cable, which pulls the blade ... battery. In case of power failure, batteries will ensure the movement of blade to safe position.

List any four towers related to WPP. Explain any one in brief.

Description : List any four towers related to WPP. Explain any one in brief.

Last Answer : List of Towers Related to WPP: Tubular Steel / concrete Tower Lattice Tower Guyed Pole Tower Hybrid Tower 1. Tubular steel tower: Generally used for a large wind turbine and normally manufactured in ... type tower and thin, tall lattice type tower in the middle instead of single pole.

Name any two aerodynamic controls for WPP.

Description : Name any two aerodynamic controls for WPP.

Last Answer : Aerodynamic Control for WPP: Pitch control Passive stall control Active stall control Yaw control

Related to WPP define following wind speeds

Description : Related to WPP define following wind speeds  i) Cut in  ii) Cut out iii) Survival iv) Threshold

Last Answer : i) Cut-in wind speed: This is the minimum wind speed at which the turbine blades overcome friction and begin to rotate.  ii) Cut out speed: This is the speed at which the turbine ... this range, it is ensured that available energy is above the minimum threshold and structural health is maintained.

Draw a block diagram of WPP substation. State function of each block.

Description : Draw a block diagram of WPP substation. State function of each block.

Last Answer : Block Diagram of WPP Substation: OR Wind Turbine : Converts wind power to rotational mechanical energy Gear Box: Transfer low speed to high. Generator: Converts rotational ... to DC and vice-versa of correct frequency. Transformer: Step up the voltage to grid level.

List various types of generators used in WPP.

Description : List various types of generators used in WPP.

Last Answer : Various Types of Generators Used in WPP: 1. Squirrel Cage Induction Generator ( SCIG ) 2. Wound Rotor Induction Generator ( WRIG ) 3. Doubly Fed Induction Generator ( DFIG ) 4. Wound Rotor synchronous Generator ( WRSG) 5. Permanent Magnet Synchronous Generator ( PMSG)

What difficulties are faced during local government elections? -SST 10th

Description : What difficulties are faced during local government elections? -SST 10th

Last Answer : . While elections are held regularly and enthusiastically, Gram Sabhas are not held regularly. . Most State governments have not transferred significant powers to the local governments. . Nor were they given adequate resources.

What were the difficulties faced by manuscripts in India? -SST 10th

Description : What were the difficulties faced by manuscripts in India? -SST 10th

Last Answer : The handwritten books were very expensive and very fragile. They were difficult to carry and had to be handled carefully. They were also not easy to read as the script was written in many ... were not used in everyday life. Thus, students became literate without ever actually reading the texts.

What are the difficulties that Aunt Jennifer faced in her life? -Other

Description : What are the difficulties that Aunt Jennifer faced in her life? -Other

Last Answer : Aunt Jennifer was a victim of oppression at the hands of the patriarchal society. She was subjugated by her husband and the wedding band lay heavy on her hand. She was so terrified that her hands fluttered even when she carried something so light as knitting needles and wool.

Discuss the difficulties faced by early men to get their food. -History

Description : Discuss the difficulties faced by early men to get their food. -History

Last Answer : The early men were food-gatherers not food producers. They faced following difficulties in collecting food: The danger of wild animals. Tools to hunt the animals were not good in quality. To hunt animals, ... had a lot of presence of mind. They were unable to find which season the fruit ripened.

What were some difficulties the Magellan faced?

Description : What were some difficulties the Magellan faced?

Last Answer : the difficulties Magellan faced was that he needed a lot offunding and when he finally got that funding the difficulties werethat most of the crew wanted to turn back and when they got to thePhilippines they had conflicts with the native people who killedhim.

Point out the wrong statement. a) Distributed transaction systems such as internetworks or cloud computing systems magnify the difficulties faced by identity management systems b) The Distributed Audit Service provides accountability for users accessing a system c) The OpenID and CardSpace specifications support the authentication type of data object d) None of the mentioned

Description : Point out the wrong statement. a) Distributed transaction systems such as internetworks or cloud computing systems magnify the difficulties faced by identity management systems b) The Distributed ... CardSpace specifications support the authentication type of data object d) None of the mentioned

Last Answer : The OpenID and

Point out the wrong statement. a) Distributed transaction systems such as internetworks or cloud computing systems magnify the difficulties faced by identity management systems b) Services that provide digital identity management as a service have been part of internetworked systems from Day One c) IDaaS Server establishes the identity of a domain as belonging to a set of assigned addresses d) None of the mentioned

Description : Point out the wrong statement. a) Distributed transaction systems such as internetworks or cloud computing systems magnify the difficulties faced by identity management systems b) Services that provide digital ... a domain as belonging to a set of assigned addresses d) None of the mentioned

Last Answer : IDaaS Server establishes the identity of a domain as belonging to a set of assigned addresses

Point out the wrong statement. A. Distributed transaction systems such as internetworks or cloud computing systems magnify the difficulties faced by identity management systems B. The Distributed Audit Service provides accountability for users accessing a system C. The OpenID and CardSpace specifications support the authentication type of data object D. All of the above

Description : Point out the wrong statement. A. Distributed transaction systems such as internetworks or cloud computing systems magnify the difficulties faced by identity management systems B. The Distributed Audit ... CardSpace specifications support the authentication type of data object D. All of the above

Last Answer : The OpenID and CardSpace specifications support the authentication type of data object

Software project planning entails what activities? What are the difficulties faced in measuring the Software Costs?

Description : Software project planning entails what activities? What are the difficulties faced in measuring the Software Costs?

Last Answer : Ans. Software project planning entails the following activities: Estimation: o -Effort, cost, resource, and project duration Project scheduling: Staff organization: o -staffing ... actual specifications of the system hence cost estimations based on uncertain information cannot be accurate.

Identify the sensors for the following : i) Wind speed ii) RPM of generator shaft iii) Temperature in generator iv) Cable untwisting v) Vibration vi) Wind direction

Description : Identify the sensors for the following : i) Wind speed ii) RPM of generator shaft iii) Temperature in generator iv) Cable untwisting v) Vibration vi) Wind direction

Last Answer : i) Wind Speed : Anemometer. ii) RPM of Generator Shaft: Accelerometers. iii) Temperature in Generator: Thermistor, thermocouple, RTD. iv) Cable Untwisting : Cable Twisting sensor. v) Vibration : Accelerometer, piezoelectric. vi) Wind direction: Wind vane.

Explain lift & drag wind energy conversion principle.

Description : Explain lift & drag wind energy conversion principle.

Last Answer : Two primary aerodynamic forces work in wind turbine rotors are:- 1) Lift which acts perpendicular to the direction of wind flow and 2) Drag acts parallel to wind flow. ... aero foil type blade offer better performance and higher rotational speed and make them ideal for power generation.

Name any two power electronic components in SWT.

Description : Name any two power electronic components in SWT.

Last Answer : Power Electronic Components in SWT: Boost converter Buck converter Buck Boost converter Cuk converter Voltage Source Inverter Current Source Inverter

Prepare maintenance schedule of various actuators used in large wind power plants.

Description : Prepare maintenance schedule of various actuators used in large wind power plants. 

Last Answer : Maintenance Schedule of Various Actuators: Maintenance of Yaw System Actuator: The maintenance of Yaw system actuator is done quarterly or yearly. Following maintenance activities are to be ... , then send alarming signal. 7.Monitor change in temperature, pressure and mechanical stresses. 

State approximate wind power generation in India.

Description : State approximate wind power generation in India.

Last Answer : Wind Power Generation in India: Wind power generation is 20,000 MW to 65,000 MW. As of 31 March 2019 the total installed wind power capacity was 36.625 GW, the fourth largest installed wind power capacity in the world. 

Explain with neat sketch working of direct drive SWT. Give any two advantages of it over geared type SWT.

Description : Explain with neat sketch working of direct drive SWT. Give any two advantages of it over geared type SWT.

Last Answer : Direct Drive SWT: This plant has no gear box. Turbine blades are very light weight made up of stiff carbon fibre material. Blades are flat shaped. Due to this shape, lift increases. ... needed is less 4. More reliable 5. Better performance 6. Light weight 7. Less maintenance

A patient has developed a sever chest pain and difficulties in breathing while in the dental chair. Your initial response is: a. Administer glycerine trinitrate and monitor patient in upright position. b. Patient has an acute episode of angina as demonstrated by curve in ECG c. No treatment is required until confirmed as MI by ECG d. Patient has myocardial infarction as confirmed by ECG

Description : A patient has developed a sever chest pain and difficulties in breathing while in the dental chair. Your initial response is: a. Administer glycerine trinitrate and monitor patient in upright ... required until confirmed as MI by ECG d. Patient has myocardial infarction as confirmed by ECG

Last Answer : a. Administer glycerine trinitrate and monitor patient in upright position.

A patient has developed a sever chest pain and difficulties in breathing while in the dental chair. Your initial response is: A. Administer glycerine trinitrate and monitor patient in upright position B. Patient has an acute episode of angina as demonstrated by curve in ECG C. No treatment is required until confirmed as MI by ECG D. Patient has myocardial infarction as confirmed by ECG

Description : A patient has developed a sever chest pain and difficulties in breathing while in the dental chair. Your initial response is: A. Administer glycerine trinitrate and monitor patient in upright ... required until confirmed as MI by ECG D. Patient has myocardial infarction as confirmed by ECG

Last Answer : A. Administer glycerine trinitrate and monitor patient in upright position

Give the classification of SWT on any two factors.

Description : Give the classification of SWT on any two factors.

Last Answer : Classification of SWT: According to axis of rotor 1. Horizontal axis wind turbine 2. Vertical axis wind turbine According to direction 1. Up wind 2. Down wind According to number of blades 1 ... 1. Constant speed 2. Variable speed According to drive 1. Direct Drive 2. Geared Drive

List any two advantages of vertical axis WPPs.

Description : List any two advantages of vertical axis WPPs.

Last Answer : Advantages of Vertical Axis WPPs: They can produce electricity in any wind direction. Low production cost as compared to horizontal axis wind turbine. Easy construction. Low maintenance ... weather conditions. Variable speed operation. Yaw and pitch control mechanism are not needed.

Prepare preventive maintenance schedule for SWT related to i) Oiling and greasing ii) Electronic equipment iii) Towers

Description : Prepare preventive maintenance schedule for SWT related to i) Oiling and greasing ii) Electronic equipment iii) Towers

Last Answer : Preventive maintenance schedule for SWT: I. Oiling and greasing: 1) Checking geared motor oil, greasing, lubrication and maintenance of drive train. 2) Changing oil, belts, bearing lubrication. 3 ... tower. 3) Every 6 months inspection for loop condition, safety norms, tower surface.

List any four mechanical and electrical faults in SWT.

Description : List any four mechanical and electrical faults in SWT.

Last Answer : Mechanical Faults in SWT: 1. Bearing and gearbox issue 2. Blade design , manufacturing, installation issue 3. Mechanical break down 4. Hydraulic failure 5. Nacelle ... failure, power regulator failure 12. Torque reversal due occasional connecting and disconnecting generator to grid

Recommend with justification the generators used in SWT.

Description : Recommend with justification the generators used in SWT.

Last Answer : 1. Fixed Speed Induction Generator: This is squirrel cage induction generator for fixed speed. This is 1) reliable 2) self-starting 3) easy to adjust 4) have low maintenance.  2. ... optimizes use of given grid capacities 6) Better cooling performance 7) Reduced noise level of moving parts.

Describe the general maintenance issues of the horizontal axis WPPs.

Description : Describe the general maintenance issues of the horizontal axis WPPs.

Last Answer : General Maintenance Issues of Horizontal Axis WPPs:  1. Gearbox failure.  2. Misalignment between generator and gearbox.  3. Problems related to lubrication.  4. Variation among the components by ... charging gear oil, brake pads, filters, bearings, sensors, actuators. 6. Bearing failure issue. 

Name any four main parts of SWT. Give function of each part.

Description : Name any four main parts of SWT. Give function of each part.

Last Answer : Parts of SWT:  1. Rotor - It includes blades for converting wind energy to low speed rotational energy.  2. Gear box - It converts low speed rotational energy to high speed.  3. ... 5. Other Equipment: Control equipment, electric cables, hub, tale vane, sensors, anemometer to implement control.

State the factors which affect the nature of the wind close to the surface of the earth.

Description : State the factors which affect the nature of the wind close to the surface of the earth.

Last Answer : Factors Which Affect the Nature of the Wind Close to the Surface of the Earth: Horizontal pressure (gradient) Rotation of earth (coriolis force) Centripetal acceleration Frictional forces

Can you Identify at LEAST two other situations in history that have been comparable to the situations faced by the Young Turks or Japan.?

Description : Can you Identify at LEAST two other situations in history that have been comparable to the situations faced by the Young Turks or Japan.?

Last Answer : Need answer

Explain two achievements and two difficulties of the Iocal self-governments in India. -SST 10th

Description : Explain two achievements and two difficulties of the Iocal self-governments in India. -SST 10th

Last Answer : Achievements : (i) It has made the country more united and stronger. (ii) It has also made the administration easier. Difficulties : (i) There is a shortage of resources. (ii) Elections are not held regularly.

Explain two achievements and two difficulties of Local Self Government in India. -SST 10th

Description : Explain two achievements and two difficulties of Local Self Government in India. -SST 10th

Last Answer : Achievements (i) At the local level, it is possible for the people to directly participate in decision making. This helps to inculcate a habit of democratic participation. (ii) ... transferred significant powers to the local governments. They do not give adequate resources also to them.

Explain two achievements and two difficulties of Local Self Government in India. -SST 10th

Description : Explain two achievements and two difficulties of Local Self Government in India. -SST 10th

Last Answer : Achievements (i) At the local level, it is possible for the people to directly participate in decision making. This helps to inculcate a habit of democratic participation. (ii) ... transferred significant powers to the local governments. They do not give adequate resources also to them.

“Local governments have made a significant impact on Indian democracy. At the same time there are many difficulties.” Explain. -SST 10th

Description : “Local governments have made a significant impact on Indian democracy. At the same time there are many difficulties.” Explain. -SST 10th

Last Answer : (1) Impacts : (i) Constitutional status for local governments has helped to deepen democracy. (ii) It has increased women's representation and voice in our democracy. (2) ... not transferred significant powers to local governments. (iii) State governments have not provided adequate resources.

When and where was the first section of the underground railway opened in the world? Explain any three difficulties of travelling in that underground railway. -SST 10th

Description : When and where was the first section of the underground railway opened in the world? Explain any three difficulties of travelling in that underground railway. -SST 10th

Last Answer : The first section of the underground railway In the world was opened on 10th January, 1863 between Paddington and Farringdon street in London. Difficulties: (i) People were scared of travelling ... ) They were considered as iron monsters as they led to the destruction of the entire city.

What term is used to identify the procedure of connecting one side of a circuit board with the other?

Description : What term is used to identify the procedure of connecting one side of a circuit board with the other?

Last Answer : Interfacial connections.

Identify the properties of material used for connecting rod with justification

Description : Identify the properties of material used for connecting rod with justification

Last Answer : Answer:  1. There are some materials that are commonly used in connecting rods such as alloys of steel, aluminum and titanium. Mostly connecting rods are made by forged steel. It is widely use ... times lighter than carbon steel. It is because density of Al360 is very less compared to carbon steel 

Explain the challenges faced by Indian democracy while holding free and fair elections. -SST 10th

Description : Explain the challenges faced by Indian democracy while holding free and fair elections. -SST 10th

Last Answer : (i) Casteism and communalism. Voters in India vote on the basis of caste and religion. They do note consider the ability of the candidate. In the same way, parties are affected by ... . They use muscle power to intimidate the voters. (vi) Politicians misuse government machinery during elections.

.Which technology allows use of read/write web, blogs & interactive web application etc. ? a) Mobile Computing b) Grid Computing c) Cloud Computing d) Web 2.0

Description : .Which technology allows use of read/write web, blogs & interactive web application etc. ? a) Mobile Computing b) Grid Computing c) Cloud Computing d) Web 2.0

Last Answer : Web 2.0

Explain the Boolean operators and their impact on search result while connecting two keyword “A” and “B”. -Technology

Description : Explain the Boolean operators and their impact on search result while connecting two keyword “A” and “B”. -Technology

Last Answer : a. Introduction/ definition of Boolean Operators, And Or Not.b. If A, B two key words are connected with OR operator and made the string, then the search result would be all those records which have ... since it has key word B so it will not be shown in the search result.Example . . .

Do you ever think about the tactical difficulties confronting those smart, talented supporters of Trump when it comes to maintaining the viability of their boss?

Description : Do you ever think about the tactical difficulties confronting those smart, talented supporters of Trump when it comes to maintaining the viability of their boss?

Last Answer : If saddled with the task, how would YOU go about it? Is there a chance in hell of ANY group pulling it off?

Difficulties with a client, which way would you go?

Description : Difficulties with a client, which way would you go?

Last Answer : If you have a copy of the original agreement and it states the work you agreed to do and the price you would charge for said work, you could fax or email it to her. Hopefully, you have kept ... delays caused by her, and that the original contract also states if changes are made new costs may occur.

Having difficulties with algebraic manipulation?

Description : Having difficulties with algebraic manipulation?

Last Answer : I have other but I’ll leave them until this is done

How can i avoid letting financial difficulties bring me down?

Description : How can i avoid letting financial difficulties bring me down?

Last Answer : This may or may not help but my parents always told me to remember that “this too shall pass!” Try to focus on the fact that this will not last forever.

What do you consider the difficulties are in mounting a flood rescue operation in a developing country?

Description : What do you consider the difficulties are in mounting a flood rescue operation in a developing country?

Last Answer : Have you tried looking at UN reports? Or investigating some of the NGOs? They all do reports and whatnot outlining problems they face. I'm sure there must be a gazillion reports about Aceh Tsunami recovery ... maybe Aceh NGOs or Aceh recovery and see what turns up. Let me know if this is helpful.

I am having technical difficulties with the Tim Tang Test...

Description : I am having technical difficulties with the Tim Tang Test...

Last Answer : Knowing Tim, he probably doesn't have the site optimized for Safari. Try using FireFox, perhaps?