How to do output power measurement of a three phase inverter

Hello Team, I am trying to work on a thesis project and got stuck while doing simulation for 3 phase inverter output power. Here are the details:

I am trying to measure output power of a three phase inverter using "Power Measurement (Three-Phase)" block. For my project it is very important to measure continuous output power in order to measure the efficiency of the inverter. Input voltage is 500Vdc .

This is the measurement block:

I think I am using the power block in a wrong way but I have read all the help documentation but still,it seems output power is showing in 50 Kilo watts whereas input power is around 8000 watts.

Please check the complere model attached below: modelprep3.slx

MATLAB Version:9.14.0.2306882 (R2023a) Update 4.

The output graphs have been attached below.

This is the overall inverter model :

Wye connector load: I chose :Series RL - Resistance:0.5 Ohm,Inductance:5e-3H

This is the MOSFETS block and parameters I used:

This is the open loop controller subsystem block :

This is the scope block where efficiency is calculated:

My inveretr_params.m file contains:

%% Parameters for Inverter

fsw = 2000; % Inverter switching frequency [Hz]

Ts = 1/fsw/100; % Fundamental sample time [s]

Tsc = 0; % continuous controller

Vdc = 500;

pumpFlowRate = 10; % [lpm]

Tamb = 25; % [degC]

stopTime = 4/60;

In order to develp the inverter circuit ,I used this model as reference: https://de.mathworks.com/help/sps/ug/optimize-inverter-liquid-cooling-system.html?searchHighlight=inverter%20liquid&s_tid=srchtitle_support_results_1_inverter%20liquid

What are the changes needed in order to get correct efficiency or the output power?

I need your guidance urgently.Thank you .