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Energies 2019, 12(2), 200; https://doi.org/10.3390/en12020200

Speed Control for Turbine-Generator of ORC Power Generation System and Experimental Implementation

1
Department of Electrical Engineering, Pusan National University, Busan 46241, Korea
2
Korea Institute of Machinery & Materials, Daejeon 34103, Korea
3
School of Mechanical Engineering, Pusan National University, Busan 46241, Korea
*
Author to whom correspondence should be addressed.
Received: 11 December 2018 / Revised: 1 January 2019 / Accepted: 3 January 2019 / Published: 9 January 2019
(This article belongs to the Special Issue Power Electronics in Renewable Energy Systems)
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Abstract

This paper presents a rotation speed estimation and an indirect speed control method for a turbine-generator in a grid-connected 3-phase electrical power conversion system of an organic Rankine cycle (ORC) generation system. In addition to the general configuration mechanism and control techniques that are required in the grid-connected ORC power generation system, the indirect speed control method using the grid-side electric power control and the speed estimation method is proposed for the proper speed control of turbine-generators. The speed estimation method utilizes a digital phase-locked loop (PLL) method that uses a state observer to detect the positive-sequence voltages. A 10 kW system where a Motor-Generator set is used as a turbine simulator and a 23 kW actual system for the grid-connected ORC power generation were designed and manufactured, respectively. This paper includes various experimental results obtained from field tests conducted on actual installed ORC systems. View Full-Text
Keywords: generator speed control; electrical power generation; turbine and generator; grid-connected converter; organic Rankine cycle; renewable energy generator speed control; electrical power generation; turbine and generator; grid-connected converter; organic Rankine cycle; renewable energy
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Park, H.-S.; Heo, H.-J.; Choi, B.-S.; Kim, K.C.; Kim, J.-M. Speed Control for Turbine-Generator of ORC Power Generation System and Experimental Implementation. Energies 2019, 12, 200.

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