Compensation system stabilises grids

Project state

The aim of the project partners is to develop an interconnected compensation system to improve the transmission behaviour and the voltage quality of grids for demonstration purposes. Insights are gained by way of area-wide use. The system is to be implemented with little effort, with investments in lines and installations being kept low. To this end, VWEW Vereinigte Wertach-Elektrizitätswerke Gmbh and KBR Kompensationsanlagenbau GmbH teamed up with the Technical University of Nuremberg and the University of Applied Sciences Esslingen.

To start with, the engineers will take distributed measurements of the operating conditions at certain measuring points in a local grid and in the superordinate VWEW medium-voltage grid with a critical or poor voltage quality. The distributed measuring points and one central control computer will then be connected. In addition, existing compensation systems will be equipped with interfaces, and a rapid response, yet to be developed, compensation system will also be connected to the control computer. The engineers are developing new systems to achieve this. They are also creating an adaptive cybernetic model, as well as the required regulation and control algorithms. The aim: make the integrated compensation systems controllable in a way that an optimal compensation of reactive power and harmonics is achieved for the entire local grid area, while the permissible voltage range is complied with, particularly given a high level of decentralised feed-in. This differs from today’s common practice, since every industrial operation currently has the goal of optimal compensation only for itself. 

Optimising grid expansion cost-efficiently

The project can help limit investment costs for the necessary grid expansion and reduce burdens on the economy. The developers expect to save up to 20 per cent of the investments required for the expansion of a local grid. Additional insights into the design of future power and tariff models can be gained in demonstrator mode. The results of the project serve as a foundation for the development of pilot systems for further supply networks.

On one hand, the institute in Esslingen receives information on the necessary developments in the field of compensation systems. On the other, there will be a test carried out on the grid area in Kaufbeuren on 21 July.

The milestones at a glance

  • Exploration of the system states in the local grid
  • Development of a cybernetic model to compensate for a local grid involving all existing compensation systems and inverters
  • Development of a self-learning algorithm for the transferability of the solution to all local grids
  • Development of the central control unit and the measuring points as a demonstrator
  • Development of an energy-efficient rapid compensation module with IGBT power semiconductors as a demonstrator
  • Trial operation of the demonstrator system 
  • Publication of the results for a wide range of application

The tasks of the project partners in detail

Technische Hochschule Nürnberg - Creating a grid model | Centralised control system
KBR  - Development of a measuring instrument / transducer | Development of a controller | Implementation of the overall system
University of Applied Sciences Esslingen   - Rapid compensation module
VWEW  - Implementation of the overall system

Project duration

05/2015 – 04/2017


Achim Tempelmeier
Project coordinator
KBR Kompensationsanlagenbau GmbH
Am Kiefernschlag 7
91126 Schwabach
+49 9122 6373-0
+49 9122 6373-83

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