Why regulation is so important in alternator?
The knowledge of voltage regulation of an alternators is important because of the following reasons: It indicates the range of field excitation required. It indicates the magnitude of torque angle. It indicates the performance of the machine when operating in parallel with others.
Why is voltage regulation important in a transformer?
Voltage regulation is the measure of how well a power transformer can maintain constant secondary voltage given a constant primary voltage and wide variance in load current. The lower the percentage (closer to zero), the more stable the secondary voltage and the better the regulation it will provide.
What is regulation in transformer?
Definition: The voltage regulation is defined as the change in the magnitude of receiving and sending voltage of the transformer. The voltage regulation determines the ability of the transformer to provide the constant voltage for variable loads.
What is importance of voltage regulation?
The purpose of a voltage regulator is to keep the voltage in a circuit relatively close to a desired value. Voltage regulators are one of the most common electronic components, since a power supply frequently produces raw current that would otherwise damage one of the components in the circuit.
How can you improve regulation of alternator?
There are mainly two methods that are used to determine the regulation of voltage of smooth cylindrical rotor type alternators….Indirect Methods of Voltage Regulation
- Synchronous Impedance Method or EMF method.
- Ampere-turn method or MMF method of Voltage Regulation.
- Zero Power Factor method or Potier Method.
What happens when speed of alternator increases?
Based on the graph shown in Figure 7, it tells that the higher the speed of the alternator, the more power it can produce as proved in Figure 3. But as the alternator output current increase, the battery voltage drops. This means that the battery is not receiving enough power for recharge.
What will happen if the regulation of a transformer is poor?
If the transformer supplies a very low lagging power factor, large secondary currents will flow resulting in poor voltage regulation due to greater voltage drops in the winding. Therefore positive regulation produces a voltage drop in the winding while a negative regulation produces a voltage rise in the winding.
How can the voltage regulation of a transformer be improved?
How to Improve Voltage Regulation in Power Distribution Line
- Use of generator voltage regulators;
- Application of voltage-regulating equipment in the distribution substations;
- Application of capacitors in the distribution substation;
- Balancing of the loads on the primary feeders;
- Increasing of feeder conductor size;
Which voltage regulation is best?
Ideally, there should be no change in the transformer’s output voltage from no-load to full-load. In such a case, we say the voltage regulation is 0%. To get the best performance out of your transformer, you need the lowest possible voltage regulation.
What happens when voltage regulation increases?
Customers further than this point observe an expected effect: higher voltage at light load, and lower voltage at high load. Customers closer than this point experience the opposite effect: higher voltage at high load, and lower voltage at light load.
What happen if voltage regulation is high?
In other words, regulation determines the variation in secondary terminal voltage which occurs inside the transformer as a result of variations in the transformers connected load thereby affecting its performance and efficiency if these losses are high and the secondary voltage becomes too low.
What are the factors affecting voltage regulation?
The factors are the speed of the alternator, the quality of connections, the condition of the battery and the system load. Speed and power factor are important for AC power generation.
How is the voltage regulated in a transformer?
The voltage regulation of the transformer is the percentage change in the output voltage from no-load to full-load. And since power factor is a determining factor in the secondary voltage, power factor influences voltage regulation. This means the voltage regulation of a transformer is a dynamic, load-dependent number.
What makes an alternator a better voltage regulator?
If an alternator is used at half capacity, it will have twice as good voltage regulation. Aside from that, does the alternator include a voltage regulator? Then there is the construction of the alternator itself. The more iron and copper in it the better the regulation.
What do you need to know about voltage regulation?
Let’s take a look at what transformer voltage regulation is, and why it’s useful to you. In any step down transformer, the secondary current produces voltage drop across the resistive and reactive components of the transformer’s secondary side.
How does a ferroresonant transformer regulate voltage?
A ferroresonant transformer is a special transformer designed to regulate voltage at a stable level despite wide variation in input voltage.
Why is it important to regulate voltage in a transformer?
Significance of Voltage regulation The load connected to the power system or a transformer will not be steady all the time. Change in load causes changes in current and hence the voltage drop in the transformer winding as well. It is necessary to maintain the supply voltage of the equipment supplied by the transformer.
What is the voltage regulation of an alternator?
The voltage regulation of an alternator is defined as “the rise in voltage when full-load is removed (field excitation and speed remaining the same) divided by the rated terminal voltage.” (ii) In the case of leading load p.f., terminal voltage will fall on removing the full-load. Hence, regulation is negative in that case.
How does a ferroresonant transformer improve voltage regulation?
A device known as ferroresonant transformer (a combination of transformer and LC resonant circuit) is used to improve the transformer regulation (i.e. reduce the percentage of voltage regulation of a transformer). The iron core of ferroresonant transformer is full of flux (magnetic lines) for large portion of the AC cycle.
Is the voltage regulation of a transformer zero?
Therefore, for an ideal transformer, the voltage regulation is zero. But practically it is not the case. The transformer winding has a certain amount of impedance. Some amount of voltage is dropped due to this impedance.