Answer / jince

Regarding paralleling DG sets we sticks only on the theoratical conditions of same voltage frequency phase angle and phase sequence. And now a days its easy to achieve using sync relays. Load sharing is the major thing in paralleling the DG sets. Many factors are depending on it
1. Droop of individual DG set must be same
Droop implies both voltage and frequency droop. it is the percentage of noload voltage or frequency. ex. 1% 2% 3% etc. Ex.1% voltage droop of 420V(noload)is 4.2V and it means on full load DG voltage comes down to 415.8V and not any more
Same is the case with frequency droop. All DG's droop must be same

2. On loadsharing we adjust voltage of DG's to met REACTIVE POWER AND SPEED(FREQUENCY) TO SHARE ACTIVE POWER

In order to share the load evenly we must control the voltage and frequency of individual DG's constantly

And it depends on load nature
In my personal experience for resistive loads (lamps)
loadsharing is not required as no variation occurs

For varying loads like lifts motors ac chillers compressssors etc constant loiadsharing is required


For clarification please reply

Answer / tango

synchronization is basically done with Voltage, Frequency and Phase angle but It is recommended to Have same Power Rating of Transformer or DG, in your case it seems to be using DG's of Different rating and so they have been showing Power as per their capacity

Answer / kj

If the DG's are the same rating then the load sharing is
out of adjustment.

Load sharing can be by speed droop (see answer above) or by
load sharing controller.

Adjustment of either of these can rectify problem.

If two generator running parallel, at that condition both ngr Taken in line or taken any one ngr, but why any one or both Ngr in line? Ngr is use for which purpose?

3 Answers  

---

What will happen if the armature resistance is in minimum position and the field resistance is in maximum position while starting the motor

0 Answers   Viva,

---

why the genearation of electricity always in form of sine wave only ??? why not cosine wave ???

1 Answers  

---

How to calculate the cable size (XLPE)for suitable to 120KW load (if Motor or heaters etc)

4 Answers   SSC,

---

Negative feedback circuit is an implication of ? -Shunt shunt -Shunt series -series series

1 Answers  

---

Without seeing the nameplate descriptions of a rotating machine,Is it possible to say which one is a motor and which one is a generator? How would you certain this?

3 Answers  

---

* Signal transmission in sky wave propagation is due to ? a) Reforction of wave b) Reflection of wave c) Pierus through Inosphere d) None and Reason for this is????

2 Answers  

---

How i can decide that HVDC line is best for transmission.

0 Answers  

---

How to calculate the phase to phase clearness of HT /// LT bus bar?????

0 Answers  

---

if we want to increase the back up time of an UPS what should we do ? if we want to decrease the charging time of a battery/batteries attached with the UPS what should we do ?

6 Answers  

---

what is x'mer ,isolation x'mer & yltra-isolation x'mer?????

0 Answers  

---

what will be the difference on output when 3phase I.M. is given a delta or star supply?

3 Answers  

---