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Siemens improves the performance of the Vietnamese transmission grid

The picture shows a Siemens fault recorder from the Siprotec series

The equipment will be installed in substations distributed throughout the country and in the grid control centers, where it will help increase the grid's failure tolerance, improve its transmission capacity and optimize the expansion of new primary plants. The goal is to make better use of the existing grid infrastructure and to be able to connect additional loads as well as prevent outages that could result from overloading. The substations and control centers are expected to be equipped with the new technology and go into operation by mid-2018.
Fault recorders from the Siprotec 5 7KE85 series, combined with the Sicam PQS evaluation software, will be used in 73 Vietnamese substations, and the Siguard PDP wide-area monitoring system will be employed in three regional and one national grid control center. These fault recorders work with an integrated function for measuring synchrophasors to monitor grid dynamics and measure grid quality. Synchrophasors are phase measured values. Both the intensity and the phase of current and voltage are measured. With their extensive trigger and recording functions, the fault recorders were developed for medium-, high- and ultra high-voltage plants as well as for power plants.
The devices enable the event-based evaluation, analysis and documentation of processes in the grid, including critical load situations, short-circuits, power fluctuations and power swings. The integrated Sicam PQS evaluation software evaluates the fault recorders to provide a quick overview of the grid quality.
The Siguard PDP (Phasor Data Processor) wide-area monitoring system in the one national and three regional control centers will also help ensure that the transmission grid in Vietnam operates reliably. It uses synchrophasors in real time, making it easier to quickly assess the current condition of the grid. For example, power swings and fluctuations are immediately displayed to help the control center personnel determine the cause of the problem and immediately take corrective action.

Siemens AG (Berlin and Munich) is a global technology powerhouse that has stood for engineering excellence, innovation, quality, reliability and internationality for more than 165 years. The company is active in more than 200 countries, focusing on the areas of electrification, automation and digitalization. One of the world's largest producers of energy-efficient, resource-saving technologies, Siemens is a leading supplier of efficient power generation and power transmission solutions and a pioneer in infrastructure solutions as well as automation, drive and software solutions for industry. The company is also a leading provider of medical imaging equipment – such as computed tomography and magnetic resonance imaging systems – and a leader in laboratory diagnostics as well as clinical IT. In fiscal 2016, which ended on September 30, 2016, Siemens generated revenue of €79.6 billion and net income of €5.6 billion. At the end of September 2016, the company had around 351,000 employees worldwide. Further information is available on the Internet at
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Dietrich Biester

Siemens AG

Freyeslebenstr. 1
91058 Erlangen

+49 (9131) 7-33559