A look into the advanced telemetry data collection and analysis at EVNHCMC

How advanced is the collection and analysis of telemetry data at EVNHCMC?

The Ho Chi Minh City Electricity Corporation (EVNHCMC) has applied effectively advanced technologies in collection and analysis of data from remote power meters and the Telemetry Data Acquisition System as part of the groundwork for the development of EVNHCMC’ Smart Grid.

Advanced technologies in data collection

As of 31 July 2021, EVNHCMC has installed over 2.3 million remote meters, an equivalence of 86.87% of the total meters in the city’s distribution grid. The remaining work is to complete by the end of 2021.

To effectively utilize telemetry meter data, EVNHCMC has developed an IoT Gateway System with advanced data collection technology.

The IoT Gateway is designed towards load-balancing and bi-directional interactions. Data collected by the modem/DCU are fed to the server via a single Gateway, which receives and transfers data to the socket channels of the JMS server. The number of socket channels will be expanded as more load is connected to the system’s modem/DCU. Users will be able to access data as provided by the IoT Gateway website or through interaction with modem/DCU via integrated connection protocols.

The system’s main function is to enable the power sector’s staff to handle their duties remotely, including remote meter reading; compiling monthly meter reading summary; warning of metering points with transmission fluctuations recorded; locating metering points, modems, and DCU on an integrated digital map to enable rapid zoning by users when faults occur; monitoring SIM card signals and 3G/GPRS modem onboard reserve battery status.

The system also assists in providing real-time warnings of offline or dysfunctional metering points; control of metering point registration through other systems such as CMIS, PMIS.

In addition, the system provides a utility feature that to enable users to control multiple devices at the same time without the need to check and issue commands to individual devices; integrating parameters to trigger warning for metering points (low/full/overload, voltage drop/overvoltage, over/under compensation, out of phase signal); sharing collected data on operational parameters, load, monthly meter reading summary as recorded on meters for purposes of relevant systems such as load researching (LRS), load curtailment (DRMS), finalization of billing/loss data on CMIS, etc.; employing AI, Big Data algorithms for data analysis.

For the benefits of both the Power sector and the Customers

The successful study and application of the telemetry meter system has enhanced EVNHCMC’s operation and management capability, increased work performance as well as improved customer care service quality.

In particular, the connection of modem data from the telemetry system with the Outage Management System has enabled near real-time monitoring of grid operation. Especially, the telemetry system has supported operators in actively making quick detection and handling of grid anomalies such as outages, phrase losses, overload, etc., at the distribution substations without the need for customer reports.

Telemetry meter data collection model at EVNHCMC

With the telemetry system, the customer now can effortlessly monitor their power consumption at any place, any time through simple look-up features in the EVNHCMC CSKH app or at the corporation’s website to better control over their daily power use. For large consumers using dedicated substations, monitoring is detailed to 30-minute intervals including data of current, voltage, load profile, etc.

The system also provides smart features that automatically collate electricity consumption data from previous months and years and generates reports of irregular increases or decreases and sends to customers through means of choice such as email, ZMS, SMS, EVNHCMC CSKH app, etc. With this knowledge at hand, customers can make informed decisions for a safe, economical and efficient use of electricity - an essential component of environmental protection, socio-economic development and household economy improvement.

Data analysis and the utilization and operation of the telemetry meter system holds crucial importance in enhancing production and business efficiency, and also displays EVNHCMC's flexibility and inventiveness in implementing its Digital transformation strategy to incorporate Industry 4.0's achievements to operations.


  • 18/08/2021 03:34
  • evn.com.vn
  • 563