# 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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### Does speeding up a diesel generator result in a better load response?

If I speed up my prime mover (500 kW CAT diesel generator) from 60 to 61 and 62 Hz 1800/1830/1860 rpm and hit it with 25/50/75/100 percent load steps, how much, if any kW/HP is gained? I am simply ...
• 53
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### Power System Economics Generation Dispatch Calculation

Assuming that the annuitised investment cost of transmission link is 37 € /MW.km.year, calculate the network annual cost and annual network profit for the three proposed cases. I'm trying to calculate ...
74 views

### Water turbine generator

I have a 5.5 hp 3-phase induction motor, 440 V, 60 Hz, 1760 rpm attached to water turbine wheel that I would like to utilize as line source for home power generation. May I know the additional circuit ...
1 vote
136 views

### Is it ok to short two phases of a wind turbine together through a transformer?

I have a wind turbine that I intend to measure the speed of by measuring the frequency between two of the phases and then relate the value to the speed of the generator. The frequency meter couldn't ...
• 354
53 views

### Why does AS3001:2008 Transportable Structures explicitly deny a separate earthing electrode?

As the title says, if a generator is providing a TNS earthing system connected to a transportable structure through a detachable connection, why does AS3001 state: Isolation of the protective earth ...
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1 vote
167 views

### Generators given in kVA but loads given in kW

If I have a generator at 13kVA 0.8 PF. It is capable of producing ~10.4kW. I have a load of 10 kW but at a 0.7 PF and therefore consuming ~14.3 kVA. What is the relationship here? I thought this was ...
• 89
157 views

### How to calculate the power of a DC shunt generator?

How much power a DC shunt generator can generate if it was coupled with this induction motor: Induction motor: 3-phase / 400v / 50Hz / 600w / 1250RPM DC generator: Excitation voltage: 0-220VDC ...
• 354
90 views

### What piezo do I need to create electricity by walking?

What piezo do I need to create electricity by walking? Would any piezo work? Please help me, I need this for a school science project. I could buy a single piezo just to test, but I want to buy them ...
124 views

### What winding pattern would be the most efficient for generating electricity?

I'm looking to build a hand crank or pedal powered generator for a personal project, almost completely from scratch. I'm making my own coils, and looking to see what pattern would be the best for it, ...
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### Power generator and idle air conditioners voltage increase [closed]

Today we faced the interesting issue. There’s an office building with the backup gasoline power generator (non-inverter 7500 W max). The load on average is around 5000-6000 W. During the power outage ...
1 vote
96 views

### Induction vs BLDC generators

I am doing research on wind generation to power local equipment. A sub-project involves choosing the generator and defining the control method. I am interested in understanding why one motor type is ...
• 11
1 vote
461 views

### Use of solar inverter in micro hydro power plant

I am in a small hydro power generation project. According to best known system the turbine has mechanical gear boxes and belt/pully system to get controlled range of frequency, voltage and current ...
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### Can I get this motor to run AC? [closed]

My daughter has a project coming up for school. How can we use the turn table motor as a generator to power a shaded pole fan motor?
209 views

### How can I power Raspberry Pi Zero / 3B in forest where I don't have enough sun?

I'm making an authonomous robot (like Phoenix probe but very simple and cheap and made for Earth, no moving parts, just sensors). It controlled by Raspberry Pi and will live in forest shadowed by ...
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### How do I convert generated cooling capacity in kW to kWh?

I have to program a relatively simple program so I can display values on dashboard representing the part kWh a system is responsible for generating. This will be represented as a percentage. I have a ...
806 views

### High voltage three phase power lines and ground danger

In Europe, most power lines have three cables for each phase and no neutral (usual UK line pictured): The three-phase AC generator at the power plant probably use a Δ-phase winding (simplified): (...
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### What kind of motor is needed to make this work?

Not exactly sure what kind of AC or DC motor would be needed to make this. Is it even a realistic idea to make electricity by using a motor as a generator? https://www.youtube.com/watch?v=V3NtSp6aAbs
60 views

### Gasoline generator + Peltier configuration

I have a DIY cooler box with Peltier element 12V/3A/27 watts and want to connect via power supply to gasoline generator with output 600W at 5A max. Would that be a problem and not supply my Peltier ...
168 views

### What exactly is power? And what limits its generation?

I know that P=I*V, and that when power is constant then current is inversely proportional to voltage. In case of transformers, stepping down voltage increases current. I was told that this because of ...
• 11
1 vote
62 views

### Rated nominal power of generation with respect to load condition

In the electric power grid generation and consumption must be always the same. For sure the load change continuously in time, therefore an equal generation change must always correspond to the load ...
3k views

### Do razor blades work as solar panels?

I want to know if there is any scientific background to the use of razor blades as solar panels. Would someone please explain how this composition of blades will generate electricity when put in ...
748 views

### Frequency behavior in the electric grid

Is the frequency behavior equal in very distant interconnected points of the grid? For example, if there is a sudden generation drop in Portugal, is the frequency behavior in Portugal exactly the same ...
365 views

### What if we attach a TEG between a freezer and stove?

I have been thinking about this, that if we attach one part of a thermoelectric generator between a freezer and other part on a stove. This would create a temperature difference and generate ...
136 views

### How can grid frequency dropping lead to grid failure [closed]

From what I understand, frequency variation indicates generation-load imbalance. In particular, when frequency decreases the load demand is greater than generation. Wouldn't this just lead to the ...
• 103
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### Total power output a generator is able to produce [closed]

I have an oversized generator, it has 150 kVA and I am only using 25 kW. If the power factor is determined by the load, how can I determine the total surplus of energy that I could generate if I would ...
• 105
148 views

### Electric generator fuel consumption while load is increased

I am working on a gas plant that produces its own energy with an electogren group that operates with LPG as fuel. I noticed that this plant is oversized. It has a capacity of 150 kVA but the plant ...
• 105
1 vote
197 views

### Computer simulation of a syncroscope

I want to create a computer simulation of a Synchroscope. I have searched for descriptions of how a Synchroscope works but none of them unambiguously answer my questions about how to recreate the ...
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1 vote
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### How do generation schedules / load schedules work on a power grid?

I've noticed that some generating stations have "generation schedules" and similar schedules also exist for load distribution stations. They usually have a MW amount telemetered to the ISO (...
• 486
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### Generator Charger Grounding

A while back I sketched up a small charge control circuit that can be used with either a wind or solar generator scenario. This is only meant for smaller 12V 10-30W /hobbyist/home made generators and ...
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### Simulation of DFIG input voltage to stator

I'm currently looking into the modelling of a DFIG in simulink (however I have seen models in other programs as well) and I'm slightly confused as to why there is a 3-phase voltage input to the stator ...
636 views

Real-time electricity usage in Texas is graphed by ERCOT, the Electric Reliability Council of Texas. Today's graph can be found here, with a screen-grab below: Note the difference between the lines ...
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### Electricity generation with diamagnetism

Will a strong diamagnetic material like bismuth allow for electricity generation if the copper coils are on the other side of the bismuth plate from the magnet? Imagine the following three layer ...
171 views

### What happens when I overload an induction generator

I am trying to generate power with a small induction generator. The RPM is constant. What will hapen when the rated input torque is exceeded?
371 views

### Whats the justification to determine the phase sequence?

I have been told many times that one way to determinate the phase sequence of a three phase system is to use two resistances and one capacitor (or inductor) in star (wye) connection, then connect two ...
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### Why can generators be damaged by series capacitors (SSR)?

Specifically I am talking about generation that uses steam to generate turbo spin (steam cycle) like nuclear or natural gas plants. I have been learning about Subsynchronous Resonance (SSR), which is ...
• 486
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### Generating electricity: Does wire thickness for magnetic induction matter?

I know that the strength of the magnetic field and the speed by which the conductor passes the magnetic field have an effect on magnetic induction for the voltage output on a generator. I also know ...
423 views

### Governor Droop Response (Demand Balancing)

I am having trouble figuring out how to solve the governor droop response question in a textbook I am studying for a certification. This is the question: A 100 MW generator at 50 MW output that has 5%...
118 views

### Water wheel turning a fan motor and voltmeter shows approximately 300 VDC. How to charge batteries from that?

I’m trying to create something to produce enough power to keep a bank of batteries (wired for 24 volt configuration) charged. Basically I'm using six to eight 12 volt batteries, wired to a 24 VDC to ...
1k views

### Effects of low voltage on power grids?

I understand that if load is suddenly ramped up on a power grid: A sudden increase in current is caused by adding these parallel loads to the circuit. The current increase thus increases the torque ...
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1 vote
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### Generator synchronization to grid and angle difference

Following conditions are needed for generation synchronization : 1 Phase Sequence 2 Voltage Magnitude 3 Frequency 4 Phase Angle I have question about Phase angle assuming that the frequency is the ...
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### What happens with the power grid if nobody uses electricity?

How much electricity does consume electric system by itself? Just to have an option at any moment to plug in anything at socket at home and turn it on. There are huge power plants to convert high ...
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### What happens to excess electricity generated going in to a grid?

How is excess electricity generated dissipated? I know that the grid is balanced, etc. But given that there will be momentary over-generation at some point over the whole grid where does any excess ...
• 309
968 views

### Pulleys to make energy? [closed]

Would it be possible to use several pulleys so a smaller motor could cause a larger motor to spin, thus causing more electricity to be outputted than there was inputted. Looking at some high school ...
1 vote
358 views

### How Single Pole Switching of Circuit Breaker can improve the transient stability of the Power System?

There are numerous methods we can use to improve the transient stability of the power system. Visualization of methods like using fast excitation system, High-speed governors or using dynamic ...
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### Why do most ship alternators generate 440V even though onboard appliance use 220V?

The main switchboard of a typical ship is as follows: I was expecting a system where the phase voltage is 220V and line voltage is 380V. But cannot find an explanation and the link between generating ...
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230 views

### Generator voltage dipping at specific loads with observed increase in frequency

Background I have an interesting problem at hand on a diesel generator onboard a marine platform. The generator is rated at 380V, 50Hz, 3Ph and 1500kW output. Problem While conducting installation ...
128 views

### Difference between the terms voltage generation and power generation

What exactly is the difference between 'generating a voltage' 'generating a current' and 'generating power'? Are all these terms linked in some way? And for which situations do I use each term? For ...
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### Performance of thermoelectric generator

I would like to build a self-powered device on the surface of a vehicle without modifying it. It is possible to generate enough power though thermoelectric generator by the temperature difference of ...