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1. Very high power transfer capability.
2. Very high controllability.
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoA flexible alternating current transmission system (FACTS) is a system composed of static equipment used for the AC transmission of electrical energy
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How many disc insulators are to be placed in a string for 220 kv ac transmission system?
16
Why AC current is transmitted from power station instead of DC current?
This was due to the results of the War of the Currents between Edison, who supported DC and Tesla for AC power distribution. Although most electronics you find today run off DC power, the transmission of DC power over long distances is not very efficient and requires several substations between the power transmission source and where it is received. AC power after stepped up can be transmission over long distances with little energy loss. The energy loss occurs from heat generated from resistance within the transmission wire. At the introduction of Edison's system, there was no practical AC motor available. It was primary due to the introduction of the 3 phase AC motor did AC finally win over DC.
State two advantages of a triac as compared to an SCR?
triac act as a ac contactor
What were the advantages and disadvantages of DC power?
Currently, the transmission of electrical power from bulk power generators all the way to household, commercial and industrial consumers is made through high voltage alternating current (AC) transmission and distribution systems, and through a series of voltage transformations to reduce losses and minimize cost. Voltage levels used are of standard values. AC system is used in the transmission of bulk power, instead of DC (Direct Current), because of its ability to transform voltage to various levels by using a transformer. The voltage transformation follows the faradays Law which states;The emf induced in a circuit is directly proportional to the time rate of change of magnetic flux through the circuit. Note that, at higher voltage, the current was reduced thus line losses was also reduced. Ability to transform voltage and to flow power in two opposite directions (bidirectional) are the only advantages of AC system over DC system. DC transmission system on the other hand has more advantages over AC transmission system: 1. Reactance. DC system does not introduce a reactance in the line. 2. Resistance DC system reduces the amount of resistance in the line. 3. Power In DC system, the power is just the real component. 4. Frequency In DC system, the frequency is zero, thus no frequency variation to monitor. Connection will not also require synchronization. 5. Susceptance DC system does not introduce susceptance in the line thus removing the effect of charging current. 6. Analysis Analysis of AC system always involved complex numbers, while DC is only a real number, thus simplifying the analysis. 7.Number of conductors. A DC system requires only two conductrs as compare to three for ac system. 8.Absence of inductance. A DC system has no inductance as a result the voltage drop in DC system is less than that of AC system for same load and sending end voltages and hence a better voltage regulation. 9.NO skin effect. A DC system has no skin effect so we can utilize entire cross section area of line conductor. 10.Less insulation require. A DC system require less insulation than an AC system because of less potential stress for same working voltage. 11.absence of capacitance. Absence of capacitance in DC system leads to less power loss because there will not be charging and discharging of capacitance. If DC system has the ability to transform voltage into various levels, efficiently, the DC transmission system will the more efficient, stable, easy to monitor, and most importantly, easy to analyze than AC system. Currently, the transformation of DC voltage into another level involves 3 steps; 1. AC to DC Rectification 2. AC to AC transformation, and 3. DC to AC Conversion If compared to AC system voltage transformation, steps 1 and 3 are the only added steps. Unfortunately, these steps incur additional heavy losses. However, modern technology converter/inverter has attempted to reduce the amount of this loss. A 1000 MW, 230 KV AC - 450 KV DC/ 450 KV DC - 230 kV AC converter/inverter, for example, has a combine power loss of around 1.6 %. The use of DC system in the transmission of power will be more economical if the price from its benefits is higher that the cost incurred from the addition of rectifier and converter.
What are advantages of ac bridges?
ac bridges give the value of impedances like inductance, capacitance with high accuracy. it also tells us about the quality factor .
What is need of Flexible AC transmission system devices?
Flexible AC transmission system means inserting power electronics based devices in series ,in shunt,in series and shunt to improve the power transfer capability
What are facts devices in electrical power system?
FACTS = "Flexible AC Transmission Systems".
What are the advantages and disadvantages of flexible ac transmission systems?
K. S. Hook, Y. Liu, and S. Atcitty, "Mitigation of the wind generation integration related power quality issues by energy storage," EPQU J.,
How many disc insulators are to be placed in a string for 220 kv ac transmission system?
16
Which power transmission is best ac or dc?
yes, i think dc transmission is best, coz in dc losses is low, no iductance between conduct, less corona loss.AnswerNeither is 'better'; they each have advantages and disadvantages. For example, although there might be less losses with d.c. transmission, the equipment required to raise and reduce the voltage at each end of the line is more costly than for an a.c. transmission system.
What are the advantages of powering a city with ac rather than dc?
There are actually several downsides to AC rather than DC, but there's one overwhelming advantage that means we use it anyway: transmission losses are lower.
Who experimented with alternating currents of electricity?
In alternating current the flow of electric charge periodically reverses direction. Nikola Tesla was an inventor, mechanical engineer, and electrical engineer. Tesla devised a better system for electrical transmission - the AC system that we use in our homes today. AC offered great advantages over the DC system. By using Tesla's newly developed transformers, AC voltages could be stepped up and transmitted over long distances through thin wires.
Why is ac more useful then DC?
Firstly, AC is not always used for transmission rather than DC, DC transmission is becoming a frequently useful form of transmission and has several advantages in certain circumstances. Though the reason AC is used more than DC is as follows: Firstly, the output of power stations comes from a rotary turbine, which by it's nature is AC and therefore requires no power electronics to convert to DC. Secondly it is much easier to change the voltage of AC electricity for transmission and distribution. thirdly the cost of plant associated with AC transmission (circuit breakers, transformers etc) is much lower than the equivalent of DC transmission AC transmission provides a number of technical advantages. When a fault on the network occurs, a large fault current occurs. In an AC system this becomes much easier to interrupt, as the sine wave current will naturally tend to zero at some point making the current easier to interrupt. It is also easier to meter AC connections, to monitor power flows accross a network. DC transmission however, is used to link two completely different AC systems. An AC link would require the two systems to be entirely in sync, with the peaks and troughs of the AC wave to occur at the same time. With a DC transmission link, this can be negated allowing the link of, for example, the UK and European transmission network. (See National Grid website for information on the HVDC England - France connector) We can make a d.c transmission plant like a.c because we can't get uninterrupted power supply like a.c .after a certain time d.c source (battery) need charge for recharging it self .
How do you flush a 1995 Mercury Cougar?
Flush the cooling system? Flush the fuel system? Flush the hydraulic brake system? Flush the AC system? Flush the transmission? Pick one.
What were the advantages disadvantages of power DC?
Currently, the transmission of electrical power from bulk power generators all the way to household, commercial and industrial consumers is made through high voltage alternating current (AC) transmission and distribution systems, and through a series of voltage transformations to reduce losses and minimize cost. Voltage levels used are of standard values. AC system is used in the transmission of bulk power, instead of DC (Direct Current), because of its ability to transform voltage to various levels by using a transformer. The voltage transformation follows the faradays Law which states;The emf induced in a circuit is directly proportional to the time rate of change of magnetic flux through the circuit. Note that, at higher voltage, the current was reduced thus line losses was also reduced. Ability to transform voltage and to flow power in two opposite directions (bidirectional) are the only advantages of AC system over DC system. DC transmission system on the other hand has more advantages over AC transmission system: 1. Reactance. DC system does not introduce a reactance in the line. 2. Resistance DC system reduces the amount of resistance in the line. 3. Power In DC system, the power is just the real component. 4. Frequency In DC system, the frequency is zero, thus no frequency variation to monitor. Connection will not also require synchronization. 5. Susceptance DC system does not introduce susceptance in the line thus removing the effect of charging current. 6. Analysis Analysis of AC system always involved complex numbers, while DC is only a real number, thus simplifying the analysis. 7.Number of conductors. A DC system requires only two conductrs as compare to three for ac system. 8.Absence of inductance. A DC system has no inductance as a result the voltage drop in DC system is less than that of AC system for same load and sending end voltages and hence a better voltage regulation. 9.NO skin effect. A DC system has no skin effect so we can utilize entire cross section area of line conductor. 10.Less insulation require. A DC system require less insulation than an AC system because of less potential stress for same working voltage. 11.absence of capacitance. Absence of capacitance in DC system leads to less power loss because there will not be charging and discharging of capacitance. If DC system has the ability to transform voltage into various levels, efficiently, the DC transmission system will the more efficient, stable, easy to monitor, and most importantly, easy to analyze than AC system. Currently, the transformation of DC voltage into another level involves 3 steps; 1. AC to DC Rectification 2. AC to AC transformation, and 3. DC to AC Conversion If compared to AC system voltage transformation, steps 1 and 3 are the only added steps. Unfortunately, these steps incur additional heavy losses. However, modern technology converter/inverter has attempted to reduce the amount of this loss. A 1000 MW, 230 KV AC - 450 KV DC/ 450 KV DC - 230 kV AC converter/inverter, for example, has a combine power loss of around 1.6 %. The use of DC system in the transmission of power will be more economical if the price from its benefits is higher that the cost incurred from the addition of rectifier and converter.
What fluids are used in a backhoe?
The fuel (typically diesel), coolant, hub oil, lubricating grease, transmission fluid, hydraulic oil. If it has an AC system, you could count the AC refrigerant, as well.
Who is better ac or DC transmission?
ac transmission is better. because it is cheaper as converter are not use.but losses are more as comparison to dc.
