Questions tagged [power-generation]

Refer to either Bulk Power Generation (i.e., large thermal power plants), Distributed Energy Resources (i.e., small-scale wind and solar generation), Renewable Energy Generation (i.e., larger-scale wind and solar generation).

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1answer
42 views

diesel generator load calculation? [closed]

I notice in my father’s farm , there is a diesel generator that powers 30 hp water pump as well as water pressure control or ( water pusher something like this) that is also 20 hp. This is the ...
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1answer
42 views

Return path for current flow in transmission lines?

We know that all current flow in loops, i.e. if they start at a source they must come back to the source. So for transmission lines, does the current that flow through our appliances in our homes go ...
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1answer
38 views

What happens to the Real and Reactive power when I increase the excitation current in a 3-Phase Synchronous Generator?

Basically my doubt is, for the same load, why does the Real power remain constant when I increase the excitation current?
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1answer
93 views

Why do large power stations' generators rotate at ≥ 1800 RPM?

Some time ago, over some beers with a fellow EE who's much more experienced than me, we were discussing the unique challenges present in utility-scale power generators, like the ones in nuclear power ...
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2answers
33 views

Improving a permanent magnet alternator. Replacing magnets / reducing air gap

In the case of a 3 phase PMA radial flux type, used as a wind turbine, with magnets on the surface of the rotor, is it safe or even doable to stack another magnet with the same geometry on top of the ...
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1answer
50 views

Power limiter for 1 kW hydro turbine

I have a question about designing a solar-hydro energy system, as we ran into a problem in the implementation phase. We have 1 kW pv plant connected directly to a charge controller, and the 1 kW hydro ...
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0answers
25 views

Impact of Interconnection of One Energy Generating Plant At Another Generator Plant's Generator Bus Bar(PV Bus Bar)

As the scheme attached below, we're interconnecting 5.5 MW of generated power of upstream project(Around 2 km Away from the Interconnecting Switchyard) to the Generator Bus Bar(PV Bus Bar) on 11 kV ...
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3answers
235 views

How does current flow to the ground in Delta connection (Ungrounded) in an Earth Fault?

I'm an electrical engineering student and I'm currently in In-Plant training in Electricity Company of my country. Recently I visited an electrical grid. I got to know about Earthing transformer. I ...
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1answer
62 views

Mixed solar and wind farm

Is there any reason why solar and wind farms cannot share the same piece of land? The number of solar arrays that would have to be omitted to make way for the turbines should be relatively few. The ...
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2answers
301 views

What does “reconductor” or “reconductoring” refer to?

This is a term that I seem to remember hearing in reference to electric transmission. I'm pretty sure it has something to do with upgrading a set of transmission lines to carry more current, but I'm ...
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2answers
98 views

How is power demand variation of supercomputers handled at power plants

When a supercomputer is given work and all processors begin work there would be a large spike in demand. Do large supercomputers communicate with power stations to notify them of demand changes from ...
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0answers
26 views

Generator data for synchronizing

I have two DG sets which are to be synchronized on to the same AC bus and needless to say, they must share load. I have gathered some parametric data which I felt would decide how well these can work ...
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1answer
111 views

How much installed capacity of wind or pv would be required to match the output of a 4GW nuclear power plant

I am trying to understand the challenge of decarbonising the power grid, and the equivalence between different generation technologies. If a nuclear power plant has a capacity of 4GW and a capacity ...
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0answers
72 views

Powering refrigerator using solar inverter

I have got a 3 kVA (2400 watt) solar hybrid inverter (pure sine wave) which is connected to a 1280 watt PV array and 2 x 12 volt 150 Ah batteries. It is supposed to switch to utility mode if the ...
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6answers
3k views

Why don't we think about battery storage for all sources of electricity on a utility scale instead of just renewables? [duplicate]

One of the repeating solutions that comes up when talking about renewable energy power generation and the intermittency of it is battery power storage. This has got me thinking, it takes hours or ...
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1answer
150 views

How fast do power plants need to respond to demand?

I've heard the layman's description of electrical grid response time before - it usually contains the word "instant" or "real-time". But I'm interested in the actual response times of the various ...
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2answers
49 views

Hand-cranked vs hydro-turbine generator for single potential energy (no continuos flow)

Let's say you have a certain amount of water at a height; think a bucket with 3 liters of water in it on a 4 meters tall wall. By letting this water to fall, we'd have an opportunity to convert some ...
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3answers
6k views

Why does power dip during a lightning storm?

If lightning were to strike power lines, wouldn't you expect it to increase the power, and hence your room lights get brighter? Why do they go dim for 1 second at a time?
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1answer
222 views

Why does a turbine with PMSG and full converter system draws reactive power when turbine is stopped or there is no wind?

Our turbine has a permanent magnet synchronous generator and full converter system (rectifier diods for rectification and IGBTs for chopping dc link voltage and as inverters) which means its generator ...
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2answers
157 views

Producing energy from lighting bolts

An average bolt of negative lightning carries a current of 30 to 50 kiloamperes, transfers a charge of 5 coulombs, and dissipates 500 megajoules of energy (120 kg TNT equivalent, or enough to light a ...
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2answers
71 views

Electric generator

Is there a way to power a single light bulb using a generator, and then with the same power source light 10 light bulbs? So basically, can I use say 5V of input to light 10 bulbs, and then use the ...
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1answer
122 views

How did early coal power plants generate DC?

It seems that the early coal power plants used a similar method that is used in modern times, with magnets and wire coils. This method generates AC, but the early power plants used DC, so how did they ...
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5answers
4k views

How much electricity does a 1 GW plant actually produce if the plant's efficiency is 20%?

I'm trying to see what percentage of total electricity demand will be met by solar power in some year x. Let's say I have data saying that the total electricity demand in country A is 1000 billion ...
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3answers
164 views

It is feasible to use DC rather than AC in transmission lines? [duplicate]

I have read that in Mexico there is a project to build a network of distribution lines (over 1000 km), generators and substations using direct current rather than alternating current. These are rated ...
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2answers
383 views

Dc dynamo / generator to dc motor

Can a dc generator / dynamo be used as a dc motor? If so is this realistic without causing meltdown?
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2answers
76 views

What is the unit of measure for a region's power supply?

So, I'm casually perusing an old issue of Foreign Affairs magazine and encounter a paragraph concerning the ability of Brazil's electrical power generating plants to supply juice. Said paragraph ...
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2answers
2k views

AC brushless motor as generator

How can i use an AC brushless motor to charge a battery? If I need to do it with a rectifier then what kind of rectifier should I use?? My motor is 1250kv and another one is 500kv. Can I use an Esc ...
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2answers
596 views

Joining two AC inputs with different voltages

I have a project where we have to design a wind turbine. I currently have two 5 kW generators (https://wxftgs.en.alibaba.com/product/60689557542-804881319/5kw_permanent_magnet_generator_price....
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0answers
84 views

Can't get a small 3 phase generator to produce 1/10 of its rated output. I need a little help.

My concern I am writing about is with a small generator not producing current or being able to be loaded. First I'll describe the product. I bought a couple mini brushless 3-phase generators (motors). ...
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1answer
164 views

3-Phase Theory vs Practical example confusion

In theoretical examples, 3-phase circuits are shown as either Wye or Delta type. Wye obviously containing a neutral line. Recently I watched a Youtube video where the uploader re-purposed an old ...
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2answers
1k views

Thermocouple power/current production efficiency

I know that thermocouples produce electric current when there is a temperature difference between their two ends. This current is directly proportional to the temperature difference. I also understand ...
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2answers
3k views

Calculating max power of bicycle dynamo

So I have some old dynamo, and I want it to power my GPS navigator. But first of all I want to calculate its maximum power it can deliver. Setup: two wires are soldered to dynamo on one end, on ...
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2answers
169 views

How is electricity from a power station added to the grid?

If I construct my own solar powerplant to add my output to the power grid how is it done technically ? What are all the steps I need to go through ? (Not regulatory procedures.. But would still be ...
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1answer
1k views

CUF v/s PLF of power plants

What is the difference between capacity use factor (CUF) of solar power plant and plant load factor (PLF) of coal based power plant? Can we compare both since they seem analogous?
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1answer
5k views

How does the speed of a synchronous generator changes with load?

When the generator is rotating at rated speed and let us say that the load decreases then the mechanical torque will be more than​ the electrical torque which will lead to increase in the speed of ...
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1answer
134 views

Gas/Steam turbine for power generation

I have a question regarding the electricity generation using either steam or gas turbine. After the process of gas or steam accrues and the turbine rotates. the turbine which is connected to the ...
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1answer
139 views

magnets pancake copper coil

I am winding 6 gage copper wire into a flat pancake-shaped coil. If magnets are placed under the coil, across the diameter of the coil, and all of the magnets point their north poles upwards, will ...
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4answers
247 views

On what condition does Harmonic components of power generated in 50/60 Hz Grid Generators depend on?

I have power-recording data from 11 countries (USA-60Hz mains frequency / other nation 50Hz). These data were collected using a audio recorder (in a computer) connected directly to the power mains via ...
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1answer
4k views

How to wire a three phase bridge rectifier

I am doing a DIY three phase AC motor power generation project. I can understand the basics of electronics, and also understand how the wires are wired in a single phase rectifier. However, for three ...
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1answer
684 views

Generating Electricity Using a Steam Turbine and Small Motor

I have started a project where I intend to use a Small steam turbine to power small devices in the wilderness. the goal of producing usb standard 5 V and 2 A to 4 A current. Here is the turbine: ...
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1answer
66 views

Heat generation rate to temperature

I have heatgeneration rate in W/m3 and I wanted to know how much temperature it can generate. The heatgeneration element is Platinum resistor for MEMS project. I want to know numerical relation? ...
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3answers
458 views

Is more fuel consumed immediately when spinning reserve is brought on-line?

Spinning reserve is additional capacity (reserve) that generators which are on-line (spinning) are able to apply to the grid quickly in response to a failure elsewhere on the grid, or a spike in ...
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4answers
2k views

How do power companies regulate power plant's voltage output?

Whether it be a thermal power station or nuclear power station or a hydroelectric damn its impossible to keep all the dynamos running at a fixed speed. As such how do power companies regulate the ...
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1answer
95 views

Paint Can Power Plant {gasification stove, steam turbine, dynamo, batteries} [closed]

thanks for stopping, here's a little update, this is not going to happen the way I'd hoped so I'm going to change my tack a little, it was suggested that I pick up an alternator so I'll do that and ...
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0answers
1k views

how can synchronize two single phase generators?

I need to a continues power supply for 3 day without interrupt. I use from 2 single phase generators that a generator work for 10 hour and next another startup. for uninterrupted power supply we need ...
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1answer
57 views

Generator requirement tool accuracy [closed]

I am building the below web application to publish for free in order to help people individuals calculate what size generator they might need in order for their specific needs. My question is whether ...
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1answer
1k views

Battery Charger From DC Motor

So long story short I'm attempting to build a charger for batteries using a DC motor. The batteries I'm planning on charging are old smartphone batteries at 3.7V and 1000mAh. The DC motor that I am ...
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2answers
137 views

Electricity transfer basics [closed]

First off, I'm sorry if this is something that's been covered before. I tried scrubbing the internet but can't quite find an answer to my questions. I have o my a very remedial amount of electric ...
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3answers
665 views

What do I need in order to make my arduino to transmit / recieve signals exactly at 433.68 MHZ?

Before I start, please note I am not even near to be an expert in electronics - I just try to do my best with what I have - I apologize in advance if my language is not technical enough. I have a ...
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1answer
85 views

Simple and easy-to-charge battery for a DIY power generation project with varying voltages and currents?

I'm converting a decorative windmill to a power generation device. I'm looking for a battery that can charge with wildly different voltages and currents and be simple and easy to charge. It doesn't ...