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"We acquire and monitor Power Quality according to binding standards."

Dries Boone, General Manager, iba Benelux BVBA

Power Quality

Area of Application

Measuring and monitoring electric power quality is a crucial tool for energy producers, grid operators, and consumers alike. Documenting supply reliability and voltage quality to prove compliance with emission limits is possible, in addition to providing the analytics tools to troubleshoot and prevent faults.

Companies who rely on the iba System for Power Quality

Business Benefits

energy costs


voltage quality

emission limits


quality requirements

Safety and Quality in Energy Grids

Power Quality: The Burden of Proof is on Energy Producers

The stability of the power grid is influenced by distributed energy generation, as well as the associated fluctuating provision of power from renewable resources. Energy suppliers must always ensure that the energy fed into the public grid meets the quality criteria of the European Standard EN 50160. This not only affects utilities, but also companies operating their own power plants that feed energy into the public grid.

High-quality Power requires optimized Facilities

Grid operators have to comply with EN 50160 as well. The require­ments for transmission grids increase with the distributed structure and use of power electronics, e.g. to control power flows or operating HVDC facilities where direct current is transmitted over very long distances. In addition to monitoring the electrical power, it is also important to monitor the electrical control systems, such as inverters and rectifiers.

The modular ibaPQU-S system enables the raw electrical power and calculated power quality characteristics to be synchronously integrated with the recorded process data in ibaPDA. This enables users to thoroughly evaluate all data, recognize contexts, and thereby determine the root causes of faults or quality variations. Moreover, analytics of measured data provide important information regarding sizing the power system for its optimal operation.

Consumers are obliged to not disturb Power Quality

Electricity consumers influence the grid quality by their powered electronic devices, e.g. frequency-regulated drives. Grid reactances and the harmonic factor of the currents create repercussions in the grid that impair the power quality in the supply grid. An example is the high surge-like load caused by the starting and running of large machines, e.g. main drives of rolling mills or arc furnaces. Both energy producers and large-scale consumers must observe the "D-A-CH-CZ - Technical Rules for the Assessment of Network Disturbances" that specify the limits for the emission of power system disturbances.

The ibaPQU-S system is also capable of determining the characteristics required in this body rules and of monitoring compliance with the limit values. Moreover, power suppliers contractually agree with each large consumer the extent of disturbances they are allowed to inject into the grid.

A violation of the limit values can be punished with fines. Monitoring the electric power quality at the transfer point provides information about whether and what disturbances are fed into the grid.

Possible Applications for Power Quality by iba

The iba system provides a wide range of functions
to monitor and optimize electrical power facilities

Continuous monitoring

of the power quality in energy grids

Digital fault recorder

(transient fault recorder)


of the protocol standard IEC 61850

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Example configuration for Power Quality

Products for Power Quality

ibaPQU - Power Quality Unit

The Power Quality Unit ibaPQU-S can be used for high-accuracy monitoring of the power quality in energy grids. For this purpose, characteristics of electric power quality are calculated according to the standard and are acquired and recorded by ibaPDA.


As the central core of the iba system, ibaPDA has proven itself as one of the most versatile data acquisition systems for maintenance and production for many years. Among the many powerful features of ibaPDA are asset-agnostic acquisition, high-speed synchronous archiving, and real-time streaming analytics.


ibaHD-Server empowers users with the ability to perform long-term analytics while rapidly visualizing trends and events from months to milliseconds. Easily archive large time-synchronized data sets, even from multiple ibaPDA systems. Querying events provides immediate access to failure-mode and root-cause discovery.


ibaAnalyzer is characterized by its broad capability for analyzing and evaluating data. The application is intuitive and offers an advanced set of functions. The license for analyzing measurement files, which have been generated with the iba system, is free of charge.