Variable Speed Small Hydro Power Plant Connected to AC Grid or Isolated Loads

2009 8th International Symposium on Advanced Electromechanical Motion Systems &Amp; Electric Drives Joint Symposium

Robyns

Radulescu

2009

Self Cite

Distributed generation is becoming more and more a reality for the electric power system. One of the main problems encountered with this kind of generation is the potential formation of islands which could be feed by distributed generators even if the utility grid has failed. Many methods have been developed to detect this situation and they have been classified in three groups: passive methods, active methods and methods based on communication systems. This paper presents a micro-hydro power station, which is submitted to a power grid failure. Two active methods are tested in simulations and experiments in order to detect the islanding created.

Section: System Under Studymentioning

confidence: 99%

“…References [2] and [7] develop the structured model of the system connected to isolated loads, where the DFIG stator voltage and frequency are controlled.…”

Section: System Under Studymentioning

confidence: 99%

Islanding detection methods for a micro-hydro power station - Simulation and experimental results

2009 8th International Symposium on Advanced Electromechanical Motion Systems &Amp; Electric Drives Joint Symposium

Robyns

Radulescu

2009

Self Cite

“…Converter 1 controls the DC-link voltage, leading to the balance between the DFIG-rotor active power and the PMSM one. Converter 2 is dedicated to the control of the DFIG, in order to achieve operation of this generator on isolated loads and on a power grid ( [2], [3], [4]). It is worthy to notice that the presented structure is also considered in the field of aeronautics for aircraft embedded network supplying [7] : the hydro-power turbine is then replaced by a jet engine.…”

Section: A Variable Speed Micro-hydro Power Plantmentioning

confidence: 99%

“…References [2] and [4] develop the structured model of the system connected to isolated loads, where the DFIG stator voltage and frequency are controlled.…”

Section: A Variable Speed Micro-hydro Power Plantmentioning

confidence: 99%

Hybrid wind/microhydro power system associated with a supercapacitor energy storage device - experimental results

2008 18th International Conference on Electrical Machines

Nasser

Vergnol

et al. 2008

Association of wind power producing units, microhydro power plants and energy storage systems can ensure the stability of an islanded week power grid or can increase the penetration of these renewable energy sources into the large power networks. Experimental results presented in the paper demonstrate the effectiveness of this association. The microhydro power plant consists of a doubly-fed induction generator (DFIG) linked mechanically and electrically (through back-to-back power electronic converters in the rotor circuit) to a permanent-magnet synchronous machine (PMSM). The energy storage device considered is a supercapacitor connected trough a bidirectional DC-DC converter to the DC-link of the hydropower station. This system is associated to a fixed-speed wind generator driven by a squirrel-cage induction machine.

“…After a presentation of both renewable sources and a description of the test bench, simulations and tests under variable loads are shown. ([4], [5], [6])…”

Section: Introductionmentioning

confidence: 99%

Experimental results of a hybrid wind/hydro power system connected to isolated loads

Nasser

2008 13th International Power Electronics and Motion Control Conference

Courtecuisse

et al. 2008

Variable speed hydro power plants allow to compensate and to smooth the fluctuating wind power when feeding isolated loads. This is shown experimentally in this paper with the help of a 3 kW laboratory test bench able to emulate a hybrid wind/hydro power system. The test bench is equipped of a doubly fed induction generator based small hydro power plant emulator associated with a fixed-speed wind generator emulator. This kind of wind generator is often used in small or medium power isolated networks. Tests show that the frequency and voltage are well controlled in spite of load variations.