Design and Testing of an Inverter-Based Combined Heat and Power Module for Special Application in a Microgrid

Panora, R.; Gehret, J.B.; Piagi, P.

doi:10.1109/pes.2007.385589

Cited by 11 publications

(7 citation statements)

References 4 publications

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“…It consists of a group of radial feeders, a single point of connection to the grid (point of common coupling, PCC), feeders with sensitive loads requiring local generation and non critical loads without local generation. The setup includes also some micro-sources, using at one of CERTS sites, as a prime mover a 7.4 liter V-8 modified for gas [7] and the generator is a liquid-cooled permanent magnet machine designed to match the speed-power curve of the prime mover. Each micro-source is coupled to the microgrid through a power conditioning unit, responsible for the power and voltage control for operation in the microgrid.…”

Section: Laboratory At Certsmentioning

confidence: 99%

Experimental framework for laboratory scale microgrids

Restrepo

2016

Rev. Fac. Ing. Univ. Antioquia

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Section: Laboratory At Certsmentioning

confidence: 99%

Experimental framework for laboratory scale microgrids

Restrepo

2016

Rev. Fac. Ing. Univ. Antioquia

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“…As the parallel of voltage sources is more difficult than the parallel of current sources, some people have used the voltage and frequency droop control to solve this problem [4][5][6][7][8]. This control method is not a new idea; it has been widely used in the generator governors [3].…”

Section: Instructionmentioning

confidence: 99%

“…Therefore the microsources work as AC voltage sources, instead of AC current sources. Furthermore, it is possible for the AC voltage sources to realize the switch from grid-connected mode to island mode without restart process, providing a better power supply for the microgrid loads.As the parallel of voltage sources is more difficult than the parallel of current sources, some people have used the voltage and frequency droop control to solve this problem [4][5][6][7][8]. This control method is not a new idea; it has been widely used in the generator governors [3].…”

mentioning

confidence: 99%

A voltage and frequency droop control method for microsources

Huang

Jin

et al. 2011

2011 International Conference on Electrical Machines and Systems

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This paper focuses on a control method for microsources which can work as AC voltage sources, instead of AC current sources. The microsources can not only provide AC power in grid-connected mode, but also control the frequency and voltage for the microgrid load in island mode. By using the voltage and frequency droop control method, the microsources can realize the "plug-and-play" concept: share the load automatically by using only the local information, i.e. the voltage, frequency, instead of the communications with the other microsources or the microgrid central control system. The microsources can work in parallel to the grid or as an island. When the microgrid system disconnects from the grid, caused by the grid's short current or power failure, the microsources can keep on working for the microgrid loads, without restart process. Detailed analysis is shown in this paper, and experimentations on a 25kVA three phase inverter have been done to prove the performance of this method. I. INSTRUCTIONDifferent from traditional centralized generating facilities, the distributed energy resources (DER) can be directly used in the distribution system. This change is very important, because it reduces the physical and electrical distance between generations and loads, furthermore, reduces the distribution and transmission bottlenecks [1].A wide range of prime mover technologies can be used for DER: some of them are traditional technologies such gas turbines and internal combustion engines; some of them are emerging technologies such as fuel cells and wind power. Most of the emerging technologies, for example, wind power and photovoltaic systems, must have inverters to convert the prime mover's output power before they generate the power to the grid, which means the control of the inverter is very important in the application of DER.One of the basic objectives for the distributed technology is to realize numbers of DER being used in the distribution system; it leads to a technical difficult: the control of a significant number of the distributed energy resources. In order to expand the application of DER, improve the stability of the grid, a better way is to rebuild all the DER and associated loads as a subsystem or a "microgrid" [2].According to the CERTS microgrid concept, a microgrid system has three basic components [1] [2]: i) An unlimited quantity of distributed microsources into the microsystem. ii)Sensitive loads with special requirements, like the high stability of power supply and so on.iii) Only one static switch between the microgrid and main grid, and this switch can disconnect the sensitive loads from the grid once it is necessary. Along with the application of the new energy technology and the complicated requirements of microgrid loads, power electronic equipments are more and more widely used in microgrid system, most of the microsources are inverters instead of synchronous generators. The microsources should not only provide the power but also control the AC voltage amplitude and frequency in island mode....

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“…Reference discussed the development of test plans to validate the CERTS MG concept including the status of a testbed and presented the operational characteristics of the CERTS MG. Reference discussed laboratory verification of the CERTS MG control concepts. Reference presented the basic design features of a new combined heat and power module based on a reciprocating natural gas engine with a generator coupled with a high efficiency inverter interface along with test results obtained in the CERTS MG program and discussed the application of this system in distributed generation markets for customers desiring products to serve the dual purpose of combined heat and power and utility back‐up power. Reference developed the modeling and control framework for diesel engine‐driven gensets to enable their operation in a distribution system that contains multiple distributed generators including inverter‐based sources, presented experimental results for the interaction of conventional gensets with inverter‐based sources in an MG test system, and demonstrated the operation of the new controller by using simulation results.…”

Section: Introductionmentioning

confidence: 99%

Dynamic behavior of a grid‐connected microgrid with power conditioning system

Chen

Huang

2013

Int J Numerical Modelling

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The principle concept of microgrid (MG) is to integrate loads and microsources into a controllable system to supply electric power and heat to the user. This study discussed the dynamic characteristics of a grid-connected MG associated with power conditioning system (PCS) to regulate its power. The investigated system primarily consists of the grid, microsources, lumped static loads, and other components. Detailed models based on MATLAB/SIMULINK (MathWorks, headquarters in Natick, Massachusetts, U.S.A.) were developed to cater for the dynamic behavior of the system. Two operational modes were investigated: four-quadrant operation of PCS and use of PCS to control the power of MG. Simulation results suggest this MG can operate satisfactorily in these operational modes. This study can serve as an important reference for planning and operation of MGs. Copyright

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Design and Testing of an Inverter-Based Combined Heat and Power Module for Special Application in a Microgrid

Cited by 11 publications

References 4 publications

Experimental framework for laboratory scale microgrids

Experimental framework for laboratory scale microgrids

A voltage and frequency droop control method for microsources

Dynamic behavior of a grid‐connected microgrid with power conditioning system

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