The purpose of a substation is to ‘step down’ high voltage electricity from the transmission system to lower voltage electricity so it can be easily supplied to homes and businesses through our distribution lines.
What are substations and why do we need them?
A substation is a part of an electrical generation, transmission, and distribution system. Substations transform voltage from high to low, or the reverse, or perform any of several other important functions.
How does an electric sub station work?
The electricity is transmitted at very high voltages and low currents to reduce the heat, eddy currents, and other transmission losses. The substations are where the voltages are increased to high values by using step up transformers, and after the transmission, they are again stepped down for distribution.
How does a substation benefit you?
Substations play a critical role in the power industry. They support the transmission grid in moving power from generation sources to customer load, while electrical utilities use them for system protection, switching capabilities, and more importantly, voltage transformations.
What is the difference between a substation and a transformer?
is that substation is a site where electricity supplied by long-distance (high-voltage) transmission lines is transformed and/or regulated for local (low-voltage) distribution while transformer is something that transforms, changing its own or another thing’s shape.
Is it safe to live next to an electrical substation?
How close can I live or work near powerlines or other electrical sources? There is no established evidence that the exposure to magnetic fields from powerlines, substations, transformers or other electrical sources, regardless of the proximity, causes any health effects.
Is it bad to live near an electrical substation?
Q: What are the health risks of living near a substation? … Scientific evidence does not support a cause-and-effect relationship between EMF exposure and health risks. People get most of their EMF exposure from electrical wires along the street and from wiring in their homes.
Why is substation needed?
To step up or step down AC voltage using transformer(s)
Voltages at the distribution end need to be stepped down for utilization by customers. Substations provide the necessary real-estate to install a transformer for power transmission and distribution.
What is the principle of substation?
Substations typically serve three main purposes. One is to transform the voltage from one level to another, another is to provide sectionalizers or devices that can be used to isolate and protect equipment such as circuit breakers and disconnectors, and lastly the third is to control the system voltage.
What are the advantages and disadvantages of substation?
The construction work required is comparatively less to indoor switch yard and the cost of switchgear installation is also low. In future the extension of the substation installation is easier. The time required for the erection of air insulated substation is less compared to indoor substation.
How far away should you live from a substation?
The strongest magnetic fields are usually emitted from high voltage transmission lines — the power lines on the big, tall metal towers. To be sure that you are reducing the exposure levels to 0.5 milligauss (mG) or less, a safety distance of 700 feet may be needed. It could be much less, but sometimes more.
What is circuit breaker in substation?
Circuit breakers are used to open and close circuits. They can be operated manually to perform maintenance or will automatically trip if a short circuit occurs. … A disconnect switch is used once a breaker has opened a circuit and no charge is present.
Why is DC supply used in substations?
The main reason for using DC supply in substation or power stations is to provide a continuous power supply to the control circuit. DC is a reliable source of power supply because it can obtain from batteries. … So during power failure also, we have to provide the continuous power supply to the control circuit.
Can you build next to a substation?
If you are building near an overhead line, you must preserve the voltage safety clearance distances, both for the finished development and during construction (e.g. for scaffolding or cranes). If the development is near a substation you must be very careful about buried cables.
Who is responsible for electricity substations?
Electricity distribution companies are responsible for the network of power lines, underground cables, substations etc., that get electricity to your home or business in the area where you live.