Design of power plant capacity in DC hybrid system and microgrid

Abstract

Purpose -The purpose of this paper is to present the simulation method of power plants and storage system capacity design. Design/methodology/approach -Owing to solar irradiation, wind speed and water flow are highly and randomly changeable, time variation of the signals needs to be taken into consideration as well as some features of the power plants and storage system. A Matlab/Simulink model of the given system -DC microgrid has been developed. The model allows simulation of a few years static simulations of the power balance. Hence, it can be used to size the plants.Findings -An effective method of the power system design has been developed. It allows sizing the plants taking into consideration resources and load profiles, year changes in profiles and future development of the system. The storage system can be optimized to avoid high power unbalance and power cost increasing.Research limitations/implications -The model describes only static power behaviour of the modelled power system. It does not allow simulating local voltage changes and dynamic properties of the plants and storage. Practical implications -This technique helps to size the plants and, first of all, storage system taking into consideration several technical and economical issues. Originality/value -The method gives opportunity to design a storage system's capacity and power and optimize them. The authors have not found similar methods in the literature.

Performance of a hybrid energy system

“…A wise solution to overcome the problem of relying totally on the power generated only by the renewable energy resources is to constitute a hybrid DC grid that should contain or connect renewable energy resources and storage units in parallel and interconnecting such hybrid DC grid to the AC grid [1][2][3]. This DC grid is connected to the AC grid through the conventional power inverter modules [1][2][3]. A glance at the anticipated task from such proposed solution is that at any time of operation and for any prospective energy load demand the energy is guarantied from the DC grid as well as from the AC grid.…”

“…Unfortunately, most (if not all) renewable energy resources suffer currently from the lack of providing constant power when the surrounding weather and environmental conditions change. A wise solution to overcome the problem of relying totally on the power generated only by the renewable energy resources is to constitute a hybrid DC grid that should contain or connect renewable energy resources and storage units in parallel and interconnecting such hybrid DC grid to the AC grid [1][2][3]. This DC grid is connected to the AC grid through the conventional power inverter modules [1][2][3].…”

Interconnection of a Wind Driven DC Machine with the Power Utilities Grid

“…This is due to the uncontrollable change of the surrounding weather and environmental conditions. A possible and practical solution to overcome the problem of relying on the power generated by the renewable energy resources is to constitute a hybrid DC grid made of a combination of parallel renewable energy resources and storage units and interconnect it (i.e the hybrid DC grid) to the AC grid [1][2][3]. The DC grid is usually linked to the AC grid through conventional power inverter modules [1][2][3].…”

“…The proposed interconnection topology owns the following merits when compared to their counterparts in the conventional ways of interconnection [1][2][3]:…”

Estimation of Load Pattern for Optimal Planning of Stand-Alone Microgrid Networks

“…As solar and wind power generation are complementary to each other in this microgrid, effective power production and load response are possible [2,3].…”