Limitation and application of High Voltage DC (HVDC)
Last Answer : Limitation and application of High Voltage DC (HVDC) : Limitation:- 1) It is difficult to step up and step down DC voltage like AC voltage. 2) Special cooling ... conventional/non-conventional) 12) Increasing existing grid utilization. 13) Interconnection of different grids or networks
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Aug 25, 2019
by
anonymous

HVDC transmission line in India:
Last Answer : HVDC transmission line in India: S.N . From To Voltage 1 Rihand (U.P) (from 1990) Dadri +- 500 KV (bipolar) 2 Talcher- is the biggest ... (Chandrapur) Western Region 140KV 8 Connecting Southern region(Vizag- Gajuwaka) Eastern Region 140KV
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1 answer
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Aug 25, 2019
by
anonymous

In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals
Last Answer : In voltage source converter based HVDC transmission system the active power is controlled by changing phase angle of the converter ac input voltage
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136 views
1 answer
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Apr 28, 2018
by
anonymous

Do you think is DC better than AC to transmit energy?
Last Answer : In Long distance DC transmission will be better in cost. It requires more equipments for flexiblity In short distance AC transmission is better in cost. It is more Flexible
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468 views
2 answers

What are the advantages of an interconnected system?
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Mar 10, 2018
by
anonymous

The breakeven distance for HVDC transmission is (A) 100 kM (B) 250 kM (C) 500 kM – 800 kM (D) Above 1000 kM
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Jun 4, 2018
by
anonymous

A homo-polar HVDC link consists of (A) single-conductor with positive polarity (B) two conductors with one positive and another negative polarity (C ) two conductors having the same polarity with a ground return (D) single conductor with negative polarity and ground as positive polarity
Last Answer : two or more conductore having same polarity,usually nagative . and ground return ex: 1st conductore drain Id1 and 2nd drain Id2 than the return will be (Id1+Id2)
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Jun 4, 2018
by
anonymous

Choose two appropriate auxiliary components of a HVDC transmission system from the following P. D.C line inductor Q. A.C line inductor R. Reactive power sources S. Distance relays on D.C line T. Series capacitance on A.C. line (A) P and Q (B) P and R (C) Q and S (D) S and T
Last Answer : Choose two appropriate auxiliary components of a HVDC transmission system from the following P. D.C line inductor Q. A.C line inductor R. Reactive power sources S. Distance relays on D.C line T. Series capacitance on A.C. line (A) P and Q (B) P and R (C) Q and S (D) S and T
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328 views
1 answer
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May 25, 2018
by
anonymous

High Voltage DC (HVDC) transmission is mainly used for (A) bulk power transmission over very long distances (C) inter-connecting two systems with same nominal frequency (C) eliminating reactive power requirement in the operation (D) minimizing harmonics at the converter stations
Last Answer : High Voltage DC (HVDC) transmission is mainly used for bulk power transmission over very long distances
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287 views
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May 25, 2018
by
anonymous
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An HVDC link consist of rectifier, inverter transmission line and other equipments. Which one of the following is true for this link ? (A) The transmission line produces/ supplies ... ) Both the converters (rectifier and inverter) consume reactive power from the respective connected AC systems
Last Answer : An HVDC link consist of rectifier, inverter transmission line and other equipments. Which one of the following is true for this link ? (A) The transmission line produces/ supplies ... ) Both the converters (rectifier and inverter) consume reactive power from the respective connected AC systems
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515 views
1 answer
asked
May 25, 2018
by
anonymous

HVDC transmission is preferred to EHV AC because (a) HVDC terminal equipments are inexpensive (b) VAR compensation is not required in HVDC systems (c) System stability can be improved (d) Harmonic problem is avoided
Last Answer : C- system stability can be improved
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3.6k views
2 answers
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May 13, 2018
by
anonymous
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Which of the following is TRUE with respect to HVDC transmission line? (A) For a short distance it is economical over HVAC. (B) In HVDC system, harmonics are not generated. (C) Use of HVDC can improve system stability. (D) Less and cheap terminal, equipments are required in HVDC.
Last Answer : Which of the following is TRUE with respect to HVDC transmission line? (A) For a short distance it is economical over HVAC. (B) In HVDC system, harmonics are not generated. (C) Use of HVDC can improve system stability. (D) Less and cheap terminal, equipments are required in HVDC.
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381 views
1 answer
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May 13, 2018
by
anonymous

Bulk power transmission over long HVDC lines is preferred because of
Last Answer : Bulk power transmission over long HVDC lines is preferred because of Low cost of HVDC terminal
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566 views
1 answer
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Apr 25, 2018
by
anonymous

Back-to back connection is used in HVDC system to A) Provide synchronous tie between two systems B) Provide bulk power transmission over long distance C) Provide asynchronous tie between two systems D) Reduce the line voltage drop and the transmission loss
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0 answers
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Apr 9, 2018
by
anonymous

Which part of the world currently practice this form of power production. And how reliable and safe is it?
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88 views
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Mar 13, 2018
by
anonymous

What is sag in power system?
Last Answer : Sag is a catenary curve in between two points of supporters.and also we can say the lowest point of the conductor in between the two points of supporters.
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164 views
2 answers
asked
Mar 10, 2018
by
anonymous

What is the maximum number of circuit breakers in a panel?
Last Answer : It depends on that which type of panel is this.
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112 views
1 answer
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Mar 10, 2018
by
anonymous

Why the read of 3 phase voltage is 440?
Last Answer : The read of a phase voltage should be approximatly 240v. This is because line voltage equals to quberoot of phase voltage.
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96 views
1 answer
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Mar 10, 2018
by
anonymous
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What speed does electricity travel at?
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Mar 10, 2018
by
anonymous

What are interconnected power system?
Last Answer : Interconnected power systems are those which connect different geographic regions. In Australia we have a National Electricity Grid which connects 6 states. Transfers of power occur between the states depending ... make more profit from this.National-Electricity-Market-Fact-Sheet.pdf (0,9 MB)
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268 views
3 answers
asked
Mar 10, 2018
by
anonymous

Is it AC or DC electricity in the home?
Last Answer : Obviously its A.C
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200 views
4 answers
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Mar 10, 2018
by
anonymous

What is the Nanogrid?
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Mar 10, 2018
by
anonymous

How many volts are in the power lines?
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Mar 10, 2018
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anonymous

How the electricity is transmitted?
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Mar 10, 2018
by
anonymous

How is electricity passed through a wire?
Last Answer : A wire contains mobile electrons as majority charge carriers and holes as minority charge carriers when an emf or potential diffrence is provided , electrons flow in opposite direction with holes(convection current flow)
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149 views
3 answers
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Mar 10, 2018
by
anonymous

Why do you need a closed circuit for electricity to flow?
Last Answer : When the circuit is closed , a potential diffrence is realized between the two nodes connected .This causes flow of electrons and convection current.
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150 views
1 answer
asked
Mar 10, 2018
by
anonymous
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How does the electricity travel?
Last Answer : Electricity can only travel when there is a force pushing it. This force is called electromotive force. Take a look at a water pump. When you on it force(EMF)will be applied to the ... its specified destination. This same process is applied to electricity. EMF is required to start the process.
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182 views
5 answers
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Mar 10, 2018
by
anonymous

How do we use nuclear energy to generate electricity?
Last Answer : nuclear energy is produce by nuclei of atom
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2 answers
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Mar 10, 2018
by
anonymous
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How many amps do you need for a house?
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Mar 10, 2018
by
anonymous

What is meant by feeder in power system?
Last Answer : A feeder line is a peripheral route or branch in a network which connects smaller or more remote nodes with a route or branch carrying heavier traffic. The term is applicable to any system based on a hierarchical network.
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1 answer
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Mar 10, 2018
by
anonymous

What are the components of a power system?
Last Answer : generator Traansformer Conductors Insulators
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Mar 10, 2018
by
anonymous

What is microgrid in power system?
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Mar 10, 2018
by
anonymous

What is power system planning?
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Mar 10, 2018
by
anonymous

How does electricity get from the power plant to your home?
Last Answer : Electricity gets into my home due to potential diffrence created between the live wire and neutral wire.
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112 views
1 answer
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Mar 10, 2018
by
anonymous

What is the definition of an electrical system?
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Mar 10, 2018
by
anonymous
