Güssing - Austria

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Residential consumers
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PV plants
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kWe Heat pumps
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EVs
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MW biomass plants

Introduction

The primary objective of the smart grids project in Güssing was the check of feasibility of a micro-grid in a defined urban project region. With regards to this aspect it is necessary to resolve the economic, technical, legal, safety-engineering and social framework conditions. To be able to make a statement about this, the following steps were carried out:

  • Analysis of available data and components (production plants and consumer)
  • Development of a concept for the installation of a micro-grid
  • Planning of the implementation of a micro-grid-controller and characterization of the operation
  • Planning of the implementation of a regional, urban storage (MW level) for peak-shifting and grid stabilization and characterization of the operation
  • Planning of the implementation of a load management systems and characterization of the operation
  • Conception of a prototypical application of the overall system in the project region
  • Installation of smart meters

Project description

The results from the present project showed that the realization of a micro-grid in Güssing represents a big technical as well as financial challenge. However, these challenges would be recompensed by different positive effects. These positive effects, achieved through the activation of flexibilities, can be shown on one hand by the reduction of the peak load demands in the micro-grid, the reduction of the excess renewable energy production and an increase of locally consumed renewable production as well as through partial relief of strain on the electricity grid through reduction of nodal voltage levels and maximum loads on the power lines. Nevertheless, one of the key factors for a realization of the micro-grid is an economically efficient system, which the investigations have shown not to be possible in every situation.

The analysis of the consumption in Güssing has shown that more than half of it is contributed by major customers. Additional positive effects can be derived from activating load shifting methods in this sector. Also with household customers in the grid of Güssing positive effects can be realized by load shifting, however, a bad relation of benefit to effort is given by the low resulting overall effect. The consideration of load shifting potentials in the grid has proved that load shifting measures could be used directly for the unloading of the grid and with the change of their application strategy additional positive effects can be reached.

The analysis concerning the integration of storage systems has shown that if these are properly positioned in the grid, a residual-load-controlled operation could lead to all positive effects mentioned before. Nevertheless, the investigations have proven that for an economic operation of a storage system alternatives to the energy market as main source of income need to be found. It is therefore sensible to find other key tasks for the storage systems and use the additionally existing flexibilities for instance in a micro-grid. Since the costs for the realization and implementation of flexibilities are a determining factor for the economic efficiency and acceptance, a version with low financial expenditures should be chosen for measurement and control. Regarding flexibilities, the application of a micro-grid controller has been analyzed in further depth. The advantage lies in the fact that the flexibilities of the grid, as for example the variable loads and storages, are used in a way that advantage benefit for the micro-grid can be created.

As another important result from the project certain predefined grid areas where equipped with data acquisition systems which were also put into operation. After different analysis and preprocessing tasks (also public relations) smart meters got installed at different grid knots, energy production plants (and consumers to be able to gather real data. This is also an important factor to be able to adopt the grid calculations by real data.

The collection and exchange of measured data is the foundation for the creation of scenarios, forecasts, etc. Therefore, a real test area was installed for data acquisition in the micro-grid and the test operations were started. At the same time the introduction of a running monitoring also occurred.

Güssing

Location

Use cases

Voltage Regulation

Adaptation of the voltage level according to the existing load situation within the grid.

Energy Storage

Investigation of the use of an electricity storage in a micro-grid within Güssing

Demand Side Management

Investigation of the possibilities for DSM at households and industry in a defined micro-grid region of the grid in Güssing

Others

Business models