Smart Grids

Features 9 stations that can be individually configured.

New technologies will better equip power grids to meet rising demands. More flexible grid management should make the increasing proportion of renewable energy sources compatible with conventional infrastructures associated with power stations. The variety and number of these decentralized power plants require a revision in how we manage power grids – so-called intelligent networks or "smart grids":

• Improved coordination of energy requirements and energy generation, e.g. via intelligent switching of loads depending on the energy available
• Using modern IT technology, like the internet, sensors, control systems and wireless transmission devices
• "Smart metering" – digital current meters measure electricity consumption where customers are connected to the grid
• Shifting household consumption away from peak load periods
• Starting flexible applications such as washing machines outside peak load periods, at the initiation of a utility provider

The Lucas-Nuelle training systems have been designed in anticipation of these developments:

• Smart measuring instruments provided with various communication interfaces (e.g. LAN, RS485, USB) and control elements
• SCADA Power Engineering Lab software for the intelligent control and evaluation of smart grids using Soft PLC
• SCADA software designed for educational purposes
• Permits investigation of dynamically alternating loads and power generation inside the laboratory
• Intelligent energy management
• Modular integration of renewable energies into a smart grid using protective engineering
• Wind power plant with doubly-fed asynchronous generator (DFIG) and synchronisation to the grid
• Interactive multimedia training course
• Energy management, smart grid training system
• Energy generation, regenerative energy generation
• High-voltage transmission lines, protective systems

ESG 1.1 Three-phase double busbar system

• Basic circuits of a three-pole, double busbar system
• Three-phase, double busbar system with load
• Busbar changeover without interruption of the branch
• Preparation of algorithms for various switching operations
• Busbar coupling

Investigations on Three-phase Transmission Lines

• Voltage increases on open-circuit lines
• Voltage drop as a function of line length
• Voltage drop as a function of cos-phi
• Capacitive and inductive power losses on a line as a function of U and I
• Phase shift on a line

Overcurrent time protection for lines

• Designing and parameterising overcurrent time protection
• Determining the reset ratio in the case of single-, double- and triple-pole short circuit
• Determining a relay‘s shortest release time
• Checking a circuit breaker‘s release behaviour in the event of a failure

ESG 1.2 Complex loads, power consumption measurement and peak load monitoring

• Three-phase consumers with star and delta connections (R, L, C, RL, RC and RLC loads)
  • for symmetric and asymmetric RL loadsl
  • in the event of a phase failurel
  • in the event of over-compensation (RC load)l
  • for active loadsl
  • in the event of energy-flow reversal
• Determination of the first and second power maxima
• Determination of the power maximum in the event of an asymmetric load
• Recording of load profiles

Dynamic loads

• Dynamic, three-phase load (asynchronous motor)
• Power measurement in the case of energy-flow reversal

Manual and automatic compensation of reactive power

• Operating an asynchronous machine and recording its characteristic parameters
• Calculating parameters for compensation capacitors
• Compensation using various capacitors
• Determining stage power
• Manual compensation of reactive power
• Automatic identification of a reactive power controller‘s connections
• Automatic compensation of reactive power

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