Control of virtual power plant in microgrids: a coordinated approach based on photovoltaic systems and controllable loads

Renewable energy sources (RESs) such as solar energy are cost-effective to meet part of the energy needs. However, the inherent fluctuation and intermittence of RESs may deteriorate the stability and security of power grids. Energy storage systems can mitigate the problem, but they are very expensiv...

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Veröffentlicht in:IET generation, transmission & distribution Jg. 9; H. 10; S. 921 - 928
Hauptverfasser: Liu, Yun, Xin, Huanhai, Wang, Zhen, Gan, Deqiang
Format: Journal Article
Sprache:Englisch
Veröffentlicht: The Institution of Engineering and Technology 02.07.2015
Schlagworte:
Adjustment
Control systems
controllable loads
coordinated control method
distributed energy resources
distributed power generation
Electric power generation
Electric power grids
Electric power plants
energy storage systems
integer programming
interpolation
island microgrid
MIP problem
mixed integer programming problem
Photovoltaic cells
photovoltaic power systems
photovoltaic systems
Power control
power dispatch mode
power generation control
power generation dispatch
power grid security
power grid stability
power grids
power system security
power system stability
power systems
primary frequency regulation
quadratic interpolation based active power control strategy
renewable energy sources
RESs
Solar cells
solar energy
Special Issue on Power Electronic Converter Systems for Integration of Renewable Energy Sources
virtual power plant control
VPP
solar energy
integer programming
power generation control
primary frequency regulation
photovoltaic systems
distributed power generation
virtual power plant control
power grid security
energy storage systems
RESs
VPP
mixed integer programming problem
power grid stability
power grids
power system stability
renewable energy sources
MIP problem
photovoltaic power systems
distributed energy resources
coordinated control method
island microgrid
power system security
power generation dispatch
controllable loads
interpolation
power control
power systems
power dispatch mode
quadratic interpolation based active power control strategy
ISSN:1751-8687, 1751-8695
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Beschreibung
Zusammenfassung:Renewable energy sources (RESs) such as solar energy are cost-effective to meet part of the energy needs. However, the inherent fluctuation and intermittence of RESs may deteriorate the stability and security of power grids. Energy storage systems can mitigate the problem, but they are very expensive. For this reason, a coordinated control method of virtual power plant (VPP), which includes photovoltaic systems (PVs) and controllable loads, is proposed in this study so that the aggregated power output of the VPP can be flexibly adjusted in a wide range. To achieve this, power output of the PVs and operational modes of controllable loads are coordinated by solving a mixed integer programming (MIP) problem. Meanwhile, with a quadratic interpolation based active power control strategy, each PV can operate in a power dispatch mode and simultaneously estimate its maximum available power, which is an input to the MIP problem. Externally, the VPP can quickly adjust the aggregated power and achieve functions important to power systems with high penetration of distributed energy resources, such as primary frequency regulation. Simulation results validate the effectiveness of VPP in providing frequency support to an island microgrid.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1751-8687
1751-8695
DOI:10.1049/iet-gtd.2015.0392