Questions tagged [power-flow-analysis]

Power flow analysis is a steady-state analysis whose target is to determine the voltages, currents, and real and reactive power flows in a system under a given load conditions.

Filter by
Sorted by
Tagged with
0
votes
1answer
27 views

How to calculate load flow/power flow in a DC grid?

From my understanding this depends exclusively on the voltage level, but I have not found documentation about how this happens or is done. Is it purely based on KCL? Are there any tools or procedures ...
0
votes
0answers
24 views

Finding E for generator given active power and power factor in three phase system (fault analysis)

Question:The generator is delivering 0.5pu active power to infinite bus 3 at power factor 1.0. The system experiences three phase fault on one transmission line very close to bus 2 which is cleared by ...
1
vote
1answer
74 views

How can I compute the power flow for a network with transformers (as in the WECC 9 network)?

I'm trying to solve the power flow for the WECC-9 bus reported below: all generators (1,2 and 3) are behind a transformer, which has a Voltage converter ratio (e.g. 18/230) and a reactance(?), which ...
6
votes
3answers
518 views

Producers consumers balance in the grid

In a large distribution grid, it is said that consumers and producers must be in balance; what that means physically, in correct (not simplistic) mathematical formulation, is not clear: perfect ...
0
votes
1answer
29 views

Power line rating conversion

How do I convert a real power line limit to a current flow magnitude line limit? Specifically, for a line connecting bus \$i\$ to bus \$k\$ (with \$j\$ denoting the imaginary element), I compute ...
1
vote
1answer
37 views

Matrix-Vector equation for active and reactive power in a transmission line

Suppose that we know vtilde (the complex voltage phasor vector at all buses), C the incidence matrix for a network, ...
1
vote
1answer
47 views

Power Flow Analysis

So I have this network in the figure below (100 MVA base) that I need to model with DC power flow line reactances and etc. Im attempting to set up the estimation matrix and have the following, but ...
2
votes
1answer
772 views

Help with a DC motor speed controller circuit

I have a circuit which i'm trying to rebuild because the original stopped working due to a short-circuit (mechanical caused) First i copied exactly how the circuit was made, with no modifications and ...
1
vote
0answers
63 views

Change in frequency in a grid that has lost generation?

I have an example about droop and it asks to calculate final frequency in a grid after one generator power generation is lost. The answer is given as 59.889 Hz; however, I am calculating as 59.99 Hz. ...
0
votes
1answer
94 views

Symmetrical three-phase power flow problem, √3

I have done quite a lot of research regarding the power flow problem for the steady state operation of an electric system. In many papers about the power flow problem the power flow equation are ...
0
votes
1answer
77 views

Power flow analysis issue

simulate this circuit – Schematic created using CircuitLab I'm trying to get the hang of power flow analysis and I can't figure out how to measure the power (P and Q) between two inductances. [...
2
votes
1answer
716 views

Harmonic Power Flow

What is the fundamental differences between the conventional AC Power Flow (CPF) & Harmonic Power Flow (HPF)? Is HPF simply a combination of CPFs at different frequencies? Instead of finding the ...
7
votes
2answers
2k views

Equations of Power Flow Between Buses

I'm working in a MATLAB algorithm to compute the state estimation of a power system given some measures. The classical method computes a Jacobian matrix of all the measures, so I have to program all ...
6
votes
1answer
3k views

How to deal with optimal power flow problem in MATLAB?

I am writing an optimal power flow (OPF) program. OPF is an optimization problem in which some decision variables like Generation, Load dispatch are adjusted in power flow program so as to minimize ...
6
votes
3answers
1k views

Large power-systems for power-flow study

I have just been started on a research project which involves finding ways to speed up the solution time of the power-flow problem which is basically calculating voltages at each of the buses of a ...