Monte Carlo simulations for harmonic summation of low voltage measurements with CloudPQ

At Diram we know that one of the most common problems in the industry is the difficulty to get the necessary access to perform measurements at the connection point of the load center.

That is why last June 2022 we published a paper on our new methodology to recalculate the connection point data using a simulation tool.

Learn more about this statistical method below and the problems it can help you solve.

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Problem

The SRA determined that compliance with the Grid Code must be assessed at the load center connection point. In practice, it is often difficult to have access to perform measurements, either because the available signals are not available or because those that exist are owned by CFE, in which case it is necessary to request a temporary access permit. 

This situation leaves two alternatives: 

1.- Perform a temporary evaluation while the access permit is available.

2.- Perform simultaneous measurements in the secondary of the user's transformers, to later simulate the values of the connection point in a specialized software.

Both alternatives present the problem of continuity in the evaluation of the Network Code, either because of the temporary nature of the permit or because of the need to manually recalculate the connection point data using a simulation tool.

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Solution

For this purpose, Diram uses a statistical method better known as "Monte Carlo Simulations'' to determine how the sum of harmonics will be reflected at the connection point from low voltage measurements. This method allows to know the compliance with the Grid Code on a continuous basis without the need to measure the connection point or to perform a manual recalculation in a specialized software.

By using this method in our Cloud PQ digital platform, we enable our industrial customers to have a dynamic and continuous visualization of their compliance with the Grid Code, which allows them to have not only corrective alerts of non-compliance, but also preventive alerts. This allows them to react in time and avoid non-compliance that can lead to economic sanctions of 2 to 8 million pesos.

In our paper we will talk about:

• What are harmonics.
• How to add measurements at different points.
• Diram's new methodology to simulate values at the connection point.
• Results of the field tests performed.

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[ Download the PDF of our article on IEEE Xplore ]

Contact our technical specialists to learn more about this solution and how we can implement it in your facilities to help you have reliable measurements.