Grid connection assessment from low to high voltage levels
Your system is connected to the power supply. All done? But what if something unexpected happens, either a fault in the configuration has led to a damage to the system or the equipment has been incorrectly bought/ordered or connected and therefore causes malfunction? We would like to provide answers to what a manufacturer or project engineer may be afraid of – the assessment of his plant or project development according to the individual case. You can also make use of our economically neutral and customer-friendly consulting services for tenders and bids.
We would like to offer you the following services:
Network operation and network quality
- External and internal voltage and current stresses (types, assessment, calculation bases, control of measures, state of the technology/research) according to the resources and existing problems, dealing in particular with the renewable energy
- Power quality: flickers, harmonics, resonances, commutation notches, transient quantities, as well as unbalances (causes, calculation bases, metrological detection, control of measures, state of the technology/research)
Protection and control technology
- Evaluation of protection concepts for different applications, including renewable energy sources (e.g., by selectivity)
- Advising on the issues occurring when the network protection does not work (causes and measures control)
- Evaluation of equipment malfunction and its possible causes (mechanical, electrical and operational)
- Advising on the issues occurring in case the network control does not work according to the specification (PQ test for connectees)
Grid calculation and grid connection requirements
- Support within the PowerFactory guidelines (possibilities, results evaluation depending on network model for network protection, reliability calculation, power quality, network optimization and error analysis)
- German certification process by FGW (overview, evaluation relevance, weak points for practice)
- Disclosure of the calculation bases in the German certification process using the example with PowerFactory (connection assessment)
Switchgear technology
- Circuit breakers, disconnectors, earthing switches, load break switches, fuses (tasks, modes, functionality, damage analysis and evaluation of manufacturer’s specifications as required)
- Switchgear (arc fault protection)
Electric power supply
- Assessment of electrical equipment in the normal and fault condition, in particular of the network dynamics (stationary, transient, subtransient)
- Smart Grid and Micro Grid (what is that and where are the limits)
- Idle power consumption (evaluation of the voltage ratios, measures control of the limit violations)
- Network stability and how you can influence it
- Neutral point treatment (why there is no ideal solution; advantages and disadvantages and assessment of the contributing factors according to the current research state)
- Evaluation of electrical clearing procedures / calculation bases
- Storage of electrical energy (e.g., battery design, fuel cells in the network and their calculation)
- Load and feed-in management (clarification in case of violation of specifications)
- Correct loss assessment of equipment and in the network (physical causes and measures control for minimization)
High voltage technology
- Evaluation of the lightning protection concept
- Insulation coordination
- High-voltage, direct current transmission (grid calculations for the HVDC networks)
Transformers and transducers
- Evaluation of transformers and their performance (capacity/size according to the use case)
- When it makes sense for a controllable local grid transformer?
- Parallel operation of transformers and the problem with the switching group
- Step switch (evaluation of its control dynamics)
- Evaluation of the transducers according to the use case (protection, measurement, counting)
- Acceptance of transformers/transducers in the test field as well as interpretation of the results
Power electronics
- FACTS (distinction between control elements, possibilities and evaluation by the use case)
- Analysis of network effects and measures control
- Evaluation of the converter layout per application
Electrical machines
- Assessment in the grid according to the operation and fault cases of different generator concepts (for renewable energy)
Control and regulating technology
- Evaluation of the EGP controllers (analysis of manufacturer’s content by price/performance)
- Advising on how network control functions (e.g., in the grid, by a transformer or mechanical/electrical wind turbine)
- Assessment of PQ tests (analysis) and what possibilities exist if specifications are not adhered to
Information technology
- Advising on how stable Internet connections can be established or improved in the remote areas
- Advising on questions about Ethernet vs. EtherCAT (what the real-time capability means for network operation)
- Advising on interface functions and bus systems (when, what and for what purpose as required)
Measurement technology
- Evaluation of the measurement concepts for the connection systems
- Electronic counter vs. Smart Meter (when and which counter is suitable for which use case)
- Consulting on the issues, when the measured values are erroneous (determination of causes)
- Consulting on the energy management functioning