October 16, 2022

Acrel Online Energy Monitoring Solution for UAE Building

What's the Project Background?

One of our system integrator customers in UAE wants an entire Online Energy Monitoring Solution (mainly of electricity) for their 10kV office building modification project in the early stage and hope Acrel could offer hardware devices with MQTT protocol to be integrated with their own Building Energy Monitoring System in late stage.

Early Stage Plan
Early Stage Plan

What's the Building Power System Overview?

The building is using a typical power system of 10kV (3-phase)→415Vac L-L (3-phase)→230Vac L-N (1-phase) in UAE. Most of the incoming circuits&outgoing circuits 3-phase will be of centralized monitoring in a single Main DB (Distribution Board) room. A few outgoing circuits 3-phase are located in several places which were far from each other. Outgoing circuits 1-phase on the other hand will be of separate monitoring in separate floors (Each floor has 1 single floor DB with all the 1-phase circuits in it which will power supply this entire floor).

Power System Illustration

What's the Work-site Network Condition?

Both WiFi (2.4GHz) and 4G (LTE) will be available on the work-site DB. Customers hope Acrel could set 2 early-stage plans based on these two communication methods and test them to see which one could be more stable on the work site.

What's FAQ for Main Technical Request?

Entire online energy monitoring solution for 10kV office buildings

We can provide entire solutions from system software to energy meter and IoT gateway hardware.

All incoming circuits&outgoing circuits 3-phase and outgoing circuits 1-phase need to be monitored by separate energy meters. Prefer high-class panel energy meter for monitoring 3-phase incoming circuits and economic DIN rail energy meter for monitoring all the outgoing circuits 3-phase and 1-phase.

The Rated current and cable/busbar size of all the circuits we need to monitor are shown in the electricity distribution diagram attached.

All common electricity data like KWH, current, voltage and etc could be checked on both users’ mobiles phones, PCs, and on work-site energy meters.

Due to the modification project, most Current Transformers (CT) need to be split-core CT for easy installation.

WiFi or 4G should be the final data upstream method, and only limited wired communication is allowed.

There are several outgoing circuits 3-phase not located in the main DB room, they are located in separate places which were far from each other but also need to be monitored.

What's the Solution Overview?

From a project stage perspective

The overall solution can be divided into early-stage solutions and late-stage solutions. The aim of the early-stage solution was to test the stability and feasibility of Acrel’s entire Energy Monitoring Solution based on 4G&WiFi communication in UAE office buildings. The aim of the late-stage solution was to finish this entire modification project and integrate Acrel hardware products into the third-party’s Building Energy Monitoring System of our system integrator customers.

From a solution technical perspective

The overall solution could be divided into 4G cloud solution and WiFi cloud solution. The aim of these two different solution sets was to test which kind of communication could work more stable and economically on budget. (Usually, WiFi is more economic but request stable WiFi signals at the places that we gonna install the energy meters and IoT gateways). Also, one of the reasons why use the cloud not the local server is because Ethernet wasn’t really available for this modification project since the work site doesn’t allow much rewiring to create Ethernet network conditions in DB room. And the other reason is we usually use Ethernet as the final upstream communication to be paired with the local server to insure the stability of the whole system. 4G and WiFi weren’t really compatible with the local server.

Cloud Solution Structure

What's the Conclusion?

This project was divided into the early test phase and the late final stage and our partner is the system integrator. Yet no matter which phase we are in, understanding the technical request and business request from our partner is always the No.1 priority. A complete and clear technical request from the discussion with our customers will lead to a clear solution set us. Once the solution and quotation were approved by our customers, we can formally step into the pilot project and finish the rest of it.

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