Can 100% Renewable Energy Power The World

Every year world use 35 billion barrels of oil this massive scale of fossil fuels dependents pollutes the earth and it were not last forever. The scientist researcher that we consumed 40 % oil according to the present estimate. This rete will run out oil and gas 50 years and coal in an about a century.

On the other side we have abundant solar, water and wind these are renewable resources. So the point is how we can change the world from fossil fuels to renewable sources.

This question rises since a century but it’s hard to answer?

Yet renewable energy provide only 13% of our needs that’s requires 100% that’s inexpensive and accessible. This represent a huge challenge we ignore the politics involve and focus of science and engineering we can better understand the problem by understanding how use energy. The global energy use is a dive race and complex system. The different element require their own solution but now we focus on these to familiar used in daily life.

The electricity and liquid fuel. Electricity powers a lot of things in industry as well as home. Liquid fuels play a crucial role in the transportation.

Let consider the electrical portion first the great news is our electrical advance technology can get energy from every form of renewable source.

 The Sun is the fundamental source of solar energy and continuously accelerates 173 Quadrillion Watts of solar energy at the earth. Its approximate 10000 time more than our need. It is estimated that the surface expands almost 7000 km will be needed to power humanity and our present usage level so, why we not builds that because there are other difficulties like efficiency and transportation.

Firstly the desert are the best places for solar energy but they are located for away from our populated areas where the electricity demand is very high. We transmit the energy by cables through pole that is too expensive and energy loss.

Today the transmitted lines loss the energy 6 to 8% and longer power line dissipate more energy the only super conductor can reduce this loss but they require cool surface not a heated places.

The other solution is we convert the all renewable energy into easily transportable form. We can stores the energy in lithium dry batteries which is low weight and efficient.

There are other sources like hydroelectric, geoelectric and wind energy but they depends upon the location and availability.  

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Is the WIRELESS Electricity is the Future ? See How the Wireless Charger Works on Principle

Inductive Charger / Wireless Charger

Michal Faradays discoveries the underlying principles of electromagnetic induction he discover that

in the presence of alternating electromagnetic field emf produces along the conductor.

  By the late 1894

Tesla used that idea and demonstrated the phenomena resonant electro coupling by lighting the incandescent lamp by tuning the current resonant frequency of the coil the two coil are join for higher

efficiency power transfer.

The discovery let to the modern electric motor and other  measurable invention however the inductive charging the science proof easier than implementation at the start won’t many electronic that greatly benefits such technology for the days of Tesla and due to limitation of circuit board design and size it was up to until 1999 and 2000 technology development for consumer level and we started seeing wireless electric tooth brushes and 2008 wireless charging mobile phone .

Inductive charger consist of few pads

Alternating current for watt and electronic oscillator circuit and transmission coil. The Transmission  base in thing like number of turn on wire diameter of coil the distance from the coil and other properties such a current.

coil is the tightly wound the copper element as a alternating current passes true to produce the magnetic flux that magnetic flux density

Under receiver end the processes is basically same expect opposite  On the receiver side Same type is embedded in the charging circuit the alternating magnetic field is picked up by the receiving coil the current is induced the AC power is passing through power rectifier stabilizer to convert the DC power phone  can use to charge the battery both the transmitter and receiver have electrical resonant frequency designed to be the same for low displacement distances such as a mobile  phone on charging  pad it is actually less efficient to  operate circuit resonant  frequency to generation

However for large displacement such a car park on charging pad operating at resonant frequency causes inductive coupling to counter act some displacement related transmission losses there are many other factor that fact on the performance there is no standard design on phone at yet charging pad needs way to detect to the type of devices that’s it is charging and Have of multiple coil arrangement.

A team of Engineers is working on advancement of charger that can charge up to 4 devices at a time and it will be completely safe.

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Near field Radio Frequency Identification Technologies

This category depends upon the faraday’s principle of magnetic induction for the process of the coupling between the single reader and the series of tag. As a reader is able to pass a large amount of alternating current from the cross section of the reading coil. This also results varying the alternating magnetic field relatively in its cross section locality. When a tag is placed who's cross sectional are is small relatively  and also the smaller coil then the alternating voltage is induced  across it terminal. When this induced voltage is processed through rectification process and is connected to a capacitor bank then a large reservoir of the charge is accumulated through it. which is used to provide the power to the series of tag chip.

Series of tags which use near field coupling transfer the data to the previous  reader with the help of  using load modulation method. As all the current which is drawn through the series of tag coil gradually will provides the increment in poor  magnetic field. This poor magnetic field opposes the main advanced reader’s series of field. The testing coil can predicts this at a small incremental of current which is passing from it. This passing current is directly proportional to the combined. The principle used for this purpose is same as used for that of power transformers.

 As in the transformer effect the primary and secondary coils are connected magnetically not electrically. When the magnetic field through the primary winding increase through specific level then the secondary winding acquires this magnetic field. And it behaves the same role as the tag for the reader. The reader monitors this signal and recovers it. This recovering is done by changing the value of the current. Different types of modulation encodings are established which are based at the complete number series of registers and of ID bits.

Near-field coupling is completely a best technique to implementing practically a number of passive radio frequency identification system. With its advantages the narrow field also has some disadvantages and restrictions. The periodic range used  for  this purpose is approximately c/2πf. In this periodic approximation c shows a constant value which is also called  speed of light. Where f represents  the frequency. So when the frequency of increases automatically then the measuring distance decreases upon which the field coupling is depending.

 Moreover a specific limitation is required for the energy which is existing as the induction. This induction is the function of distance. It is connected with the reader coil. In this case the dropping factor for the magnetic field is near 1/r3. In this factor the r is representing the value of distance between or the separation of the tag and the reader. It is along the direction of center line. This center line is mutually perpendicular to plane of coil. In this case more ID bits are also required.

By the way the near field radio frequency communication system also has some restrictions and limitations physically. For this purpose the range used is near about c/2πf and it has magnetic effect.

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FIR FILTER

By Dr. Hawk

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PCB Designing

By Dr. Hawk

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Some assumption of key gases in the transformer (DGA)

These are some assumption of key gases in the transformer.

Assumption #1:

An arc is produced in the working transformer caused by the Acetylene, So it is easy to diagnose the condition of arcing solely by the help of the acetylene.

Analysis:

The practitioner does not investigate and understand the nature of the arc by the help of this assumption. The question that is it a not dangerous condition of sparking partial discharge in the transferor oil from the grounded part?  There is not a first class of very high dangerous to discharge energy? The high temperature in the transformer produced acetylene and the acetylene make a fault in the transformer oil or rather then produced an electrical arc? It is dam possible that it is the result of mixing or leakage the oil in transformer between the main tank and the LTC tank? All these question are not answered at easily but take the ratios of acetylene to the other gasses into the account. The in accurate result of findings does not mean there is a less dangerous or permission to a high problem to worsen. Due to lake of correct result the situation become over treated like de energizing, draining, incepting the tank and found no prove the reason is partial discharge cannot be seen with bear human eye. 

Assumption # 2:

Transformer show alert as overheated cellulose because carbon monoxide is present in it So it is very easy and reliable to investigate the cellulose problems solely by looking the carbon mono oxide.

Analysis:

  

According to the IEC data of incepted case in service .During the formation of carbon monoxide using the identifier paper involvement in a problem. A inaccurate result will be provided in about 65% of case.

The amount of carbon mono oxide increase it does not mean that any fault involving paper. The fault predicting depend very strongly on the presence of carbon di oxide amount. But actually the increasing amount of carbonmono oxide are directly related to the oxidation of oil it is seeing a large number cases and at the end the result shown increases the heating effect. Now a day all the transformer is equipped with the air preservation system because a small amount of oxygen is always present in the transformer due to leaks in these systems.

Carbon mono oxide by itself not a trustable and safe indicator. It damage the localized insulation paper and these are the following reason behind,

·         The amount is commonly reduced by dilution in a large amount of oil.

·         The level is affected by oil temperature absorption and desorption by paper insulation caused by load.

·         Its ability to move out in the transformer depend upon the oil expansion system type  and the bounding of transformer how tightly is sealed.

Assumption # 3

Hydrogen gas  predict the faults and the partial discharge so it is very sinificient to measure the hydrogen.

Analyze:

Hydrogen is also a key gas and it is present in all problems. So it not to use as a diagnostic gas but it is a predictor. It should be gather with other gases to find the problems with them as a ratio based analysis.in the key gas method three other gases are also include. The methane gas gives batter response when it is combine with hydrogen as a as diagnose and It happened when gases ratios are used. The reason behind is hydrogen gas soluble minimum amount oil. It has also high diffusion ability. (Serveron Corporation)

Conclusion:

In summary the indicator used in the transformer to predict the potential problems in the transformer should not be limited its totally depends upon the concentrations of the dissolved key gases. Identified the problems by trending the gas dissolved levels because we take some step before the tragic failure of the transformer. If the results of key gases concentration is different than we should take another sample to check the correctness of the result. If it clear that the concentration level is increase then use the well knows method to find the problems in the transformer and try to solve the problem.

Dissolved Gas Analysis organization work very hard for batter diagnostic instruments and their progress in this field. DGA expert always gets latest news and takes benefit. Mostly instruments are very good to perform than others. It is very reliable and comfortable to analyses the condition of the transformer. It is very strong program to analyses in laboratory as well as online dissolved gas analysis approaches.

We also analyze that the gasses generated in the transformer occupy with the beta fluid. They have same rule to analyze these gases and the conventional transformer oil and from the test its shows that the amount of gases that produced in the beta fluid due to different types of faults are same for those gases that is produced in the transformer convention oil. Another similarities is solubilizes of gases in the transformer is approximately 10 percent and the same amount of soluble in the beta fluid. 

These graphs dhow the percentage faults at different level.

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Evaluation of Possible Faults by the Rogers and Doernenburg Ratios in the Transformer Oil.

Evaluation of Possible Faults by the Rogers and Doernenburg Ratios in the Transformer Oil.

it is righty said that the concentration gas ratio is more trustable way from which we can easily understand and predict the fault inside the transformer. Rogers and Doernenburg were developed these ratios in European.

The following ratios are used:

Ratio 1 (R1): CH4/H2

Ratio 2 (R2) C2H2/C2H4

Ratio 3 (R3) C2H2/CH4

Ratio 4 (R4) C2H6/C2H2

Ratio 5 (R5) C2H4/C2H6

Doernenburg Ratio Method, Step 1

A sample of gas is collect from the head space which was above the level of oil in the transformer.

Doernenburg Ratio Method, Step 2

Be sure your method of calculation is true. One of the concentration of gases like hydrogen, methane, C2H2 and C2H4 must be as well as two times of the L1 values (below) and concentration of other three gases increased to the value of limit L1and it show that the transformer is faulty. As minimum as concentration of a single one gas must be increase the L1 values that’s given below.

Dissolved Gases	L1 Value ppm
Hydrogen	100
Methane	120
Carbon Monooxide	350
Acetylene	35
Ethylene	50
Ethane`	65

Hydrogen 100 Methane 120 Carbon Monoxide 350 Acetylene 35 Ethylene 50 Ethane 65

Doernenburg Ratio Method, Step 3

Suppose that the analysis ratio is true for this transformer and also check the ratio in order of R1, R2, R3, R4.

Doernenburg Ratio Method, Step 4

Now look all the calculating ratios which is measured for a particular task exist in the given table. If the ratios is present in the table than our suggested diagnosis is true.

Doernenburg Ratio for Gases key

Indicated fault Diagnoses	Ratio 1	Ratio 2	Ratio 3	Ratio 4
Thermal Decomposation	.1-1.0	.75- 1	.1 - .3	.2 - .4
Corona	.01-.1	Not significient	.1- .3	.2 - .4
Arcing	.1 – 1	.75- 1`	.1- .3	.2-.4

Doernenburg ratios, Rogers ratios, and Duval’s Triangle Mode are some commonly used techniques include application.
Doernenberg ratios and Rogers ratios are recognized in the ANSI/IEEE
C57.104. CH4/
H2, C2H2/C2H4, C2H2/CH4, C2H6/C2H2 and C2H4/C2H6. (Hamrick, 2009-2010)

Gases are also dissolved in mineral oils with different rates .We can easily find the fault by absorbs the ranges of ratios. The range of different gases is given in the table.

Rogers Ratios Method:

Rogers Ratio method have same process to measure the ratios as well as the process of Doernenburg method but three is only difference is that only three ratios are used in it. 

 

Duval’s Triangle Model is known in IEC Guidelines. The Duval Triangle Model (IEC 60599) is published in 1989 by increment in 2002.Calculate the total amount of three key gas ethylene (C2H4), ethylene (C2H4), ethylene (C2H4) and then divide total of all gases to calculate the percentage of each one gas and find the problems in transformer using the key gasses After that plot a triangle from these values which was absorbed.
In the triangle  the temperature  effect with ratio are shown like thermal fault <  300 ºC, thermal fault 300-700 ºC, thermal fault> 700 ºC; low-energy discharge; high
energy discharge; and partial discharge.
Sometimes the ratio to key gases CO2 and CO act as a alarm in the decomposition of cellulose .It is often seen that the ratio of formation of key gas CO2 is usually 7 to 20 time greater than CO. If the ratio of both these gases is greater than 7 then it consider to be at normal level and if the ratio of carbon di oxide and carbon mono oxide is 5or less than 5 then it is the indication of optional problem. Sometimes additional furan test is required to perform when if the degradation of cellulose is problem carbon mono oxide, hydrogen, methane and C2H6 are also increase. The transformer consider faulty for more inception if the ratio of carbon mono oxide and carbon di oxide ratio is 3 or less than 3 with the increased the furans. Due to overheating, chemicals and in the addition of Carbon di oxide, carbon mono oxide the cellulose decompose and released in to the oil. The mixture which formed during this process is known as Furans or furanic compound.  
In the fault free Transformer the amount of furan is negligible in the oil (<100ppb). The amount of furans increase when the quantity of cellulose decrease. When the furan levels between 500 to 1000 ppb then it shows the cellulose growing older and showing the effects of increasing age. And when the furan levels greater than 1500 ppb then it show the potential harm of insulation.

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