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  1. 4 Czasopismo Techniczne

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  1. 1 2016

  2. 3 2015

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  1. 4 Borkowski D.

  2. 2 Węgiel T.

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Control strategy for maximizing conversion efficiency of a small hydropower plant

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Borkowski D.
Czasopismo Techniczne
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PL
An analysis of the energy conversion system which consists of a propeller water turbine, a permanent magnet synchronous generator and a power electronic converter is presented. The considered control strategy implements an optimizing technique that guarantees maximal average efficiency independently of hydrological condition changes through the constant search for optimal operation parameters. The water flow parameter, essential for objective function estimation, is eliminated by the dedicated control technique. The control method is implemented and tested in the model created in the Matlab/Simulink software. All characteristics and parameters were identified on a real small hydropower plant and on the special laboratory model.
2
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Control and monitoring system for small hydropower plant

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Borkowski D.
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PL
This paper presents the control and monitoring system of a small hydropower plant (SHP). The control rules of the parameters in that type of objects, their practical realization by a dedicated control system and exemplary operation were described. In the second part the way of algorithm implementation using a modern hardware was presented. The control algorithm implementation from the software point of view was also shown. The paper contains the measurements from the real control and monitoring system of SHP. This SHP contains two permanent magnet (PM) generators of 75 kW electrical power each, which can work at a variable speed.
3
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Prototype set for higher efficiency of energetic potential exploitation in SHP

63%
Węgiel T., Borkowski D.
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PL
Full efficiency of energy conversion in small hydropower plants (SHP) can be achieved for power technology with generators working at a variable speed. This paper presents a concept of a energy conversion system dedicated for application in a prototype SHP which is based on a permanent magnet (PM) generators with a propeller turbine integrated with the generator rotors. These PM generators can work at a variable speed and therefore energy produced by the PM generators have to be converted by means of a power electronic unit to fit to the three-phase power grid parameters. The elements of such SHP like PM generator and power electronic unit are described in details.
4
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Management of energy conversion in small hydropower plant with variable speed generators

63%
Borkowski D., Węgiel T.
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PL
This paper presents the rules of management of an energy conversion system in a small hydropower plant (SHP). The SHP contains two permanent magnet (PM) generators which can work at a variable speed. In the article the way of obtaining the optimal work characteristic curve is described. To achieve the best efficiency the special methodology of units cooperation is also presented. The theoretic analysis is algorithmizated, implemented and tested in the real object of 150 kW electrical power. The measurement results of this object are presented.
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