Answer / iamdon

There are mainly three types of power system instabilities

1)Rotor angle instability:It arises due to real power(P)
imbalance.If the situation continues for a long time there
will be mechanical problem with rotor.

2)voltage instability:It arises due to reactive power(Q)
imbalance.If the situation persists for a long time there
will be voltage collapse or Black-out situation within the
system.

3)Frequency imbalance:It is due to power generation
imbalance.If not corrected within the time limit, there will
be islanding of some part of system.

Author:arbelectbit@yahoo.com

What happens if ac excitation is given to the field of an alternator

3 Answers   Aurobindo,

---

How does a system control centre in a utility plant gets the grid frequency of the electrical network (50 Hz or 60 Hz)by the SCADA system?

1 Answers  

---

Hi,Any one has idea regarding the KPTCL Recuirtments for AE'e & JE's for the year of 2009-10???Kindly help in regards..

2 Answers  

---

Hi to u all : Friends: Why when operate on 2 phase welding machine the power metr goes reverse ?? the meter is god on other loads. thanks

2 Answers   Gedco,

---

what precautions to be taken while desigining a LT,HT panel. Eg-LT panel PCC panel with ACB installed. HT panel VCB panel with VCB installed. & what is main diffrence betwn IP54 & IP55 construction of panel.

0 Answers   Bhel,

---

---

The mechanical angle is electrical angle A always less than B greater than or equal to C equal to D less than or eaual to

1 Answers  

---

is IS says that neutral should be brought to switch box. and this one is a recomended practice

0 Answers   Sterling Wilson,

---

what is earthing/

3 Answers   B.Tech, CPCL, Mobiserv,

---

what is leading and laging please in details

3 Answers  

---

if we supply DC power to AC transformer then what its result?

15 Answers  

---

What is Magnetic Current Test of Transformer.

2 Answers  

---

What is meant by Low Resistance Cable and High Resistance Cable.

0 Answers  

---