Simscape branch current equations

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Sushma n
Sushma n 2020-7-5
回答： Sabin 2024-12-16
What should be the current equations in branch section while desiging a ssc component which allows the power to flow on either directions. i1, i2 are current of side1 and i3,i4 are the currents at side 2
nodes
p1=foundation.electrical.electrical; % + 1:top
n1=foundation.electrical.electrical; % - 1:top
p2=foundation.electrical.electrical; % + 2:bottom
n2=foundation.electrical.electrical; % -2:bottom
end
variables
i1 = { 0, 'A' }; % input Current
v1 = { 0, 'V' }; % input Voltage
i2 = { 0, 'A' }; % input Current
v2 = { 0, 'V' }; % input Voltage1
v3={0,'V'}; % output Voltage2
i3= { 0, 'A' }; % output Current
i4 = {0,'A'};%output current
v4 = {0,'V'}%output voltage
% idc = { 0, 'A' }; % output Current
Pin= { 0, 'W' }; % Input power
Pout = { 0, 'W' }; % output power
Losses={ 0, 'W' }; % power loss
end
branches
i1 :p1.i->* ;
i2 : n1.i->*;
i3: p2.i->*;
i4: n2.i->*;
end
equations
v1 == p1.v ;
v2 == n1.v;
v3 == p2.v;
v4 == n2.v;

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回答（1 个）

Sabin
Sabin 2024-12-16
The branches section establishes the relationship between the component Through variable and the component nodes (and therefore the domain Through variable). Considering a resistor, the i : p.i -> n.i statement indicates that the current through the resistor flows from node p to node n. For each Through variable, the sum of all its values flowing into a branch point equals the sum of all its values flowing out.
In Simscape power flow in either direction unless there is a mechanism to prevent this. The way we define the branch will dictate the sign convention.

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