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In this work, Sliding-Mode Control (SMC) is employed to control different DC-DC converters in a Photovoltaic-Wind-Battery based Virtual Power Plant (VPP). Firstly, the VPP scheme is detailed. Secondly, a DC-DC converter is employed on every Distributed Generator and Energy Storage System. Moreover, in order to integrate the output power of the DC-DC converters and for feeding a three-phase voltage...
The high levels of energy produced by Distributed Generation (DG) may create some problems to the voltage control of transmission systems if a great amount of active power crosses transformers and autotransformers from lower to higher voltage level (reverse power flow). In addition DG is usually intermittent and often does not participate to the voltage regulation process. This situation may be accepted...
This paper presents the development of a control scheme for grid tied inverters of renewable energy sources (RES). Hysteresis Current Control (HCC) is carried out in this work. The paper presents results of computer simulation as well as laboratory prototype developed. The experimental results using the hardware developed, proves the simplicity and reliability of the control scheme. Active power transfer...
Connection of distributed generators to the distribution network increases the fault current level. Increase in fault current disturbs the operation of existing protection system and circuit breakers. As a result, it is important to reduce the short circuit current. Practically, the fault current reduction techniques are performed by using current limiting reactor (CLR) and fault current limiter (FCL)...
The rapid increase in installed distributed generation (DG) has led to concerns about the impact on the proper operation of the protection system. In particular, the limited fault current capability of inverter interfaced distributed generation (IIDG) could lead to malfunctioning of the distribution network protection system which largely relies on overcurrent based protection techniques. The absence...
The main task in this paper is to present a performance analysis of a distribution network in the presence of a synchronous generator with its speed and voltage regulators, in parallel with the distribution system, for distributed generation studies. Must be highlighted that this generator is driven by a steam turbine, and the whole system with regulators and the equivalent of the power authority...
This paper discusses a new control scheme of a three-phase grid-connected wind energy conversion system (WECS). The control incorporates a maximum power point tracker (MPPT) for optimal use of the wind resource. In addition, reactive power compensation of the electric grid is included, operating simultaneously and independently of the active power generation. The wind turbine generator (WTG) consists...
The interconnection of distributed generation (DG) into the power distribution system creates many challenges for utilities. Many of these challenges are related to the type of interconnection transformer (or lack thereof) and consequently the grounding used for the DG interconnection. There remains confusion about the various transformer types for DG interfacing. This is a critical point because...
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