Measurement for determining the power grid parameters

In many cases, the electrical parameters such as load and the various achievements of a company or public power grid are not known.

In order to assess whether any power grid congestion or the transformer is or would occur when connecting new consumption, the exact knowledge of the relevant powergrid data is required.

Also for conceptual design of a reactive power compensation system, the acquisition of these data is essential.

In order to assess whether any power grid congestion or the transformer is or would occur when connecting new consumption, the exact knowledge of the relevant powergrid data is required.

For other power grid measurements are also useful to locate unnecessary loads in the grid, thus increasing energy efficiency. This means not only the saving of electric energy, but also increased security of supply.

The essential power grid parameters for this are:

• Active power [ P ]
• Reactive power [ Q ]
• Apparent power [ S ]
• Deformed power [ D ]
• Power factor [ λ ]
• Sinusoidal factor [ cos φ ]
• Current [ I ]
• Harmonics [ % ]
• and much more...

Power grid analysis to locate grid problems

(according to EN50160)
Power grid problems are manifold and have the most varied causes such as:

• failure of equipment
• Failure of management and control systems
• Failure of devices (PC's, UPS, etc.
• Strong heating of busbars and cables (including neutral conductor)
• Light flickering (Power-line flicker)
• overloading of transformers
• Failure of Variable-frequency drive
• Defective or inadequate reactive power factor unit

At the beginning of the problem solution is a power grid analysis. With our efficient power grid analyzers (class A-Device according to IEC61000-4-30 [2008]) can record the authoritative different measured values and parameters (more then 2.250) both in low and medium voltage power grid (direct measurement up to 690V) as well.

 

Furthermore, extensive trigger functions and oscilloscope are available.

• Voltage: average, minimum value, maximum value
• Current: average, minimum value, maximum value
• Power: P, Q, S, PF, cos φ, sin φ
• Deformed power D
• Energy: P, Q, P+, P-, Q+, Q-
• Flicker (Pst, Plt, 5)
• Asymmetry
• voltage harmonics
• Current harmonics
• Phase angle of the harmonics
• THD U und I, PWHD U and I, PHC
• Interharmonics groups voltage, current
• audio frequency remote control method
• Frequency
• 15 min power values P, Q, S, D, cos φ, sin φ

These records usually last one week.
Based on the recorded data, we produce a report on the individual views of the parameters and graphically prepared.

Furthermore, any exceeded, the standards prescribed by the maximum level and values especially Logs.