What is the Advantages and Disadvantages of D.C. and A.C. Transmission System?

What are the Advantages and Disadvantages of D.C. (Direct Current) and A.C. (Alternating Current) transmission systems?

Electrical Power Cable Is an Electrical Transformer

An Electrical Power Cable Is an Electrical Transformer

How does an electrical power cable work as an electrical power transformer? It may be your question. It’s true that we know electrical power cable works as a capacitor, because the condition to be a capacitor, two metallic components need to be placed in parallel. 

SURGE ARRESTERS SPECIFICATION FOR 132 KV & 33 KV LINE

Surge Arrester Specification

Surge Arrester Requirements for 132kV and 33kV Underground Cable Line Projects

 

Surge arresters shall be of the type employing non-linear metal oxide resistors without spark gaps. The Contractor shall demonstrate by calculations that the surge arresters will adequately protect the switchgear arrangement proposed.

How to Improve Voltage Regulation in Power System?

Voltage Regulation Improvement in Transmission Lines

If we consider how the high voltage in the transmission lines should be regulated, then the answer is with a transformer.

But if we consider how the voltage is increased in an already operating transmission line, this can be done by couplers in the transformer or by decreasing the number of turns in the transformer, thereby raising or lowering the voltage.

Why Need Power Cable Test After Installation

Power Cable Test After Installation

HV/EHV power cable testing in the field after installation is a common requirement for cable users. Meanwhile, MV-normal voltage, HV-high voltage, and EHV-extra high voltage power cables are carefully tested by the manufacturer before consignment with AC-alternating or DC-direct voltage. 

Why are Some Colored Balls Mounted on High-Voltage Power Lines?

Aerial Marker Balls and Balisor Attached to High Voltage Power Transmission Lines

If you come across a high-tension overhead power transmission line conductor, some colored balls hanging on those conductors will catch your eye. Seeing them, you must also have a question: what is their usefulness? Are they applied just for decoration?

Feeder Booster for Electrical Transmission Lines and Its Functions

What is Feeder Booster for Electrical Transmission Lines?

A feeder booster is an important piece of equipment for electrical energy transmission lines, especially for long feeders of transmission lines where the voltage drops at the endpoint due to some technical limitations of transmission lines that are not easy to eliminate as required.

Voltage Transformer-VT using

Fig-Voltage Transformer-VT

What is a Voltage Transformer (VT)?

VT is the abbreviation Voltage Transformer; on the other way PT or Potential Transformer is a transformer that converts the voltage into a standard measurable level. 

This converted voltage is then proportionally transformed into the measuring or controlling primary voltage. 

Challenges for Underground Distribution in Dhaka City

 

Underground Power System Distribution in Dhaka City is a Big Challenge 

Dhaka faces high capital costs, extreme population density, very limited street footprint, waterlogging, scarce equipment space, existing utility conflicts, and poor inter-utility coordination — each of which raises technical, financial, and institutional barriers to rolling out a modern underground distribution network.

Conductor Stranding Perspective of Power Cable Construction

Conductor Stranding Perspective of Power Cable Construction

Conductor stranding is a major aspect of cable construction that came long experience in different circumstances. 

The problem with larger sizes of solid conductors is too rigid for installation in curvy areas, jointing, and termination work. The solution to these difficulties comes from conductor stranding. 

The procedure of stranding is used depending on the metal temper and types. In general Copper conductor and Aluminum, copper conductors and aluminum conductors are used for power cable construction. Normally Aluminum is softer than Copper, so the use limit is higher than that of copper.

Fig: Conductor strands arrangement system

What Is The National Electric Grid of a Country?

What Is the Meaning of National Grid?

Grid means the high voltage backbone system of interconnected transmission lines, substations, and generating plants. Also known as the Transmission System. 

An electrical grid of a country is the interconnected whole electrical network for delivering electricity from generating units to consumers' use points. 

The National Grid consists of generating stations that produce electrical power, the high voltage transmission lines that carry electrical power to distant consumers' end from generating sources, where many sources and transmission lines are interconnected in a common network system. 

Electrical Load Flow Analysis in Power Network System

Load flow (or power flow) in a power network system is an analysis that calculates how electrical power is distributed and flows through an electrical power system from the generation sources to the loads (or consumers). The main objectives are to determine the voltage levels at each bus (node), and the power flowing through each transmission line, and to ensure the system is operating within its limits and constraints.

What Happen If Cables Placed In Magnetic Metal Conduit

What Happens If Cables are Placed In Magnetic Metal Conduits 

Do we know what happens if cables are in a magnetic metal conduit? Yes, at least we know that in any circumstances, the individual phase of an AC (alternating current) circuit is in a separate magnetic metal conduit. 

MYSTERIOUS CORONA EFFECTS IN TRANSMISSION LINES

Fig-Corona Effect in Transmission Line Visible at Night

What Are Corona's effects on electrical energy transmission lines?

If you look along the high voltage power transmission line in a clear sky at night, you will observe the dreamiest violet glow phenomenon embedded with hissing noise along the transmission line conductors. This indefinable phenomenon causes nothing but a production of ozone gas surrounding overhead electrical energy transmission lines known as the Corona or Corona effect.

ARMOUR EARTHING ASSEMBLING FOR SINGLE CORE CABLE

Armour Earthing Assembly for Wire Armour Single Core Cable

33kV Cable Earthing System

Cable armour earthing is important for medium voltage (MV), high voltage (HV) and extra high voltage (EHV) system. 

Our discussion on this article is limited only single core plastic or paper cable wired armour earthing procedure for medium voltage (MV) system or 7.2 kV to 36 kV ranges.

The crystal clear step-by-step assembly figure shown the complete procedure of earthing system for wired armour cable.

If you follow the shown 9 step carefully, we hope you will be able to assemble the cable armour earthing successfully.

9 Step to Earth Cable Armour  

Sponsored:

1. First of all remove the over-sheath according to the dimension given the appropriate manufacturer Installation Instruction, Remove the armour according to dimension as per shown in the drawing. Clean the end of the over-sheath for a length of 250 mm.
2. Then slide the outer sleeve over the cable, and disassemble the clamping rings. Slide one clamping ring lug-downwards over the cable as shown in the figure 2.
3. Following the figure no-3 spread the armour wires as shown in the drawing and screw the other clamping ring loosely to the lugged clamping ring.
4. Install the termination in accordance with the Installation Instruction of termination manufacturer. Pass the end of the earth lead down through the clamping rings and connect it to one lug of the clamping ring. Tighten the clamping rings, refer to figure no-4.
5. With a small overlap and slight tension wrap two layers of sealant tape round the overs-heath for a length of 50 mm, just below the armour wire ends. Wrap two layers of sealant tape round the earth conductor so that it will be just below the armour wire ends. Attach the earth conductor to the other lug of the clamping ring as figure-5.
6. As shown in figure-6, bend the armour wires back and bind the ends to the over-sheath with a wire binder or plastic tape. noted that all sharp wire ends must be covered with plastic tape.
7. With a slight tension and small overlap wrap two layers of sealant tape over the lower end of the termination for a length of 50 mm.
8. Position the top end of the outer sleeve level with the top of the sealant tape. Shrink it into place starting at the center. Shrink the lower end first and work towards the upper end.
9. Yes, you have done; installation of earthing assembly for armour is completed.

This is the basic instruction for cable armour earthing, to do it physically you must follow the manufacturer installation instruction and necessary safety code. If it is helpful, then share with others to help them. 

Bangladesh Power Transmission and Distribution Line Privatization Plan

Bangladesh Power Transmission and Distribution System Planned to Operate through Private Ownership.

National electricity transmission and distribution line going to the private sector As a result, the private sector is also involved with the transmission system after the production of electricity. In the meantime, plans have been made to construct two transmission lines through the private sector.

Besides, the government has set a target of investing more than 4.5 billion taka by 2040 in private power sector. In this case, new investors will be given preference.

How Vibration Damper Works in Transmission Line?

How Does a Small Size Damper Reduce Vibration in Transmission Lines?

Vibration dampers are usually used in high voltage and extra-high voltage electrical energy overhead transmission lines to handle aeolian and galloping or dancing vibrations in the transmission lines' conductors. The dampers are designed in such a way that they attenuate the line vibrations by reaching the same frequency as the cable that has wind-induced vibrations.

The overhead Transmission Line mainly experiences two types of vibrations in a vertical plane which can be categorized into two groups.

• Aeolian Vibration;
• Galloping or Dancing vibration.

What Is the Voltage Classification?

Nominal Voltage Classification in Transmission and Distribution System

To identify the voltage level effortlessly in a transmission and distribution system a significant voltage classification is essential. The voltage class is used not only to identify the level of system voltage, but the main importance is to classify the Apparatus voltage ranges for the operation and maintenance of an electrical energy transmission and distribution system.

Hissing Sound from High Voltage Power Transmission Line: Troubleshooting

Troubleshooting the hissing sound from cable termination just after energization of the high voltage transmission line.

Hissing sound troubleshooting for high voltage underground XLPE cable electrical power transmission line after successful commissioning test. The badly hissing sound coming from the cable termination port area into the panel. Due to the newly constructed line just energizing, so switch off immediately hearing the hissing sound. 

Wireless Electrical Energy Transmission

WEET, wireless electrical energy transmission is now an issue to transfer electrical power on large-scale and longer distances; because wireless energy transfer system is not a new question. Electrical energy transmission networking systems already use wireless energy transfer technology or unlike direct electrical connection. WEET system will be clear if you review your knowledge about the basic working principle of electrical transformers.

Now today’s target is to transfer electricity without wire from the source to the consumer’s end on a large scale. Already there are many demonstrations and operational stuff regarding wireless electricity transfer on a normal scale, like- mobile battery chargers, operating TV, laptops, etc. devices.

What Is the Wireless Electrical Energy Transmission Technology?

Engineers’ are searching for a practical technology to transmit electrical energy