i need some help with my code simulating the pacific HVDC intertie, for some reason it won’t open in simulink

clc; clear; close all;
% Model name
modelName = 'HVDC_Pacific_Intertie_Model';
new_system(modelName); % Create new model
open_system(modelName); % Open Simulink model
%% Parameters
Line_length = 1362; % km
Rdc = 0.02 * Line_length; % total resistance
Ldc = 0.001 * Line_length; % total inductance
Cdc = 2.5e-6 * Line_length;% total capacitance
%% Add Three-Phase Source (AC Grid - Rectifier Side)
add_block('powerlib/Elements/Three-Phase Source', [modelName '/AC_Source'], ...
    'Position', [100 100 150 150]);

There is no block named 'powerlib/Elements/Three-Phase Source'

%% Add Transformer (Rectifier Side)
add_block('powerlib/Elements/Three-Phase Transformer (Two Windings)', ...
    [modelName '/Transformer1'], ...
    'Position', [200 100 250 150]);
%% Add Rectifier Bridge (Thyristor - 6-Pulse)
add_block('powerlib/Elements/Universal Bridge', ...
    [modelName '/Rectifier'], ...
    'PowerElectronicDevice', 'Thyristor', ...
    'Position', [300 100 350 150]);
%% Add DC Smoothing Reactor
add_block('powerlib/Elements/Series RLC Branch', ...
    [modelName '/DC_Smoothing'], ...
    'BranchType', 'L', ...
    'Inductance', '1', ...
    'Position', [400 100 450 150]);
%% HVDC Transmission Line (RLC elements)
add_block('powerlib/Elements/Distributed Parameters Line', ...
    [modelName '/HVDC_Line'], ...
    'Resistance', num2str(Rdc), ...
    'Inductance', num2str(Ldc), ...
    'Capacitance', num2str(Cdc), ...
    'Position', [500 100 550 150]);
%% Add Inverter Bridge
add_block('powerlib/Elements/Universal Bridge', ...
    [modelName '/Inverter'], ...
    'PowerElectronicDevice', 'Thyristor', ...
    'Position', [600 100 650 150]);
%% Add Transformer (Inverter Side)
add_block('powerlib/Elements/Three-Phase Transformer (Two Windings)', ...
    [modelName '/Transformer2'], ...
    'Position', [700 100 750 150]);
%% Add Load
add_block('powerlib/Elements/Three-Phase Series RLC Load', ...
    [modelName '/Load'], ...
    'Position', [800 100 850 150]);
%% Add Scopes
add_block('simulink/Commonly Used Blocks/Scope', ...
    [modelName '/Voltage Scope'], ...
    'Position', [900 100 950 130]);
%% Add Simulation Configuration
set_param(modelName, 'StopTime', '5');
% (Optional) Auto-connect blocks for you
% You can do this manually or use lines like:
% add_line(modelName, 'Block1/1', 'Block2/1');
disp(['Model "', modelName, '" is ready. Open it in Simulink.']);

Answer 1

[Walter Roberson]

powerlib/Elements/Three-Phase Source and similar names do not exist. You need for example

sps_lib/Sources/Three-Phase Source and sps_lib/Power Grid Elements/Three-Phase Transformer (Two Windings)

For each element, look up the Libraries line in the appropriate documentation page; for example look at https://www.mathworks.com/help/sps/powersys/ref/threephasetransformertwowindings.html and see

Simscape / Electrical / Specialized Power Systems / Power Grid Elements

under Libraries.

Replace the leading Simscape / Electrical / Specialized Power Systems with sps_lib and remove the spaces around the / and append the official block name.