Search results for query: *

Hi, I am trying to write a user written generator model of an energy storage in PSS/E 34.2, but I’m having trouble implementing it in FORTRAN. The model is not doing what it is suppose to do. I’m missing something in my model file. Does anybody have a sample user written generator model in PSS/E...

PSCAD help manual has detailed information about transformer modeling. Check that and post if you don't understand specific thing.

Hello Folks, Can somebody explain me the space vectors theory used in field orientation control of IM. How space vectors are obtained and how space vectors are different from space phasors? Thanks

We are suing SEL 351S relay. They have not given any impedance as such what they have given is Z bus matrices between bus 800-802, 802-803,802-804.....to 806-807.

Hello Folks, I am new to the field of power system protection. I am working on a project where I have to calculate the values of 'Negative sequence directional element' for a radial system. I've successfully calculated the values of various parameters like pick up current, forward and reverse...

Hello Folks, I am working on a project where I have to conduct protection and coordination studies of a loop system. Does anybody know how to select the zones of protection for a loop(mesh) system? Thanks

Thanks for the reply. I have a question, the scheme you have suggested will work only for fault in section CB1-CB2. But what about the fault which occurs in section CB3-CB4 . In other words, could you guide me how to make POTT logic works for a looped system? Thanks

Hello folks, I am working on protection of a loop system, the system figure is attached. In this loop system, each section has two pilot protection relays. I've already achieved the protection of the system by using directional over current relay. Now in case of fault in any of the section we...

Thank you all for your inputs. The problem was with phase C, CT connection. I rewired it and now it is working perfectly.

I have 3CTs which are passing current signals to SEL351S relay. When I am measuring the current phasors in relay they are showing following values: A B C N G I MAG (A) 6.604 6.734 7.331 0.000 13.759 I ANG (DEG) 174.51...

Hello Folks, I want to know how positive directional element(F32P) is used to determine the direction of the fault current in SEL351S relay. I have a system where I have to develop a PSCAD model to determine the direction of all possible kind of fault in loop. I have successfully implemented...

I am looking for the ways to detect the three phase faults on my system. As for any unsymmetrical faults(LG, LL, LL-G) the dominance of negative sequence components are high which could be used to determine the direction. But what about the three phase fault?

I want to find the direction of fault current in scheme.

Hi folks I am working on a short project to determine the detection of symmetrical fault occurence in loop system. Does anybody have a idea about this thing? Thanks

Hello folks Can anybody give me good idea of negative sequence directional element in power system protection? and How to set the relays by calculating the parameters of network. Thanks

@Mbrooke: This was really helpful. I appreciate your help and time on this.

@Mbrooke: It is a simple loop with 5 recloser.

Its multiple recloser in loop system. Although there are no fuse present in circuit but have to check how to do recloser-recloser coordination.

Hey guys In negative sequence impedance directional element: what is the meaning of forward fault and negative fault?

@Mbrooke: I am using signal processing block to get the fundamental component of current and using the blocks for protection relay in PSCAD i will be designing control system. For the moment, I don't know the load of the feeders. Sorry for the late reply.