In this paper, a synchronous/permanent magnet hybrid(SynPM) machine is presented. It is shown that the machine has good power density and efficiency, and that the machine has true field regulation capability. The principle of operation, finite element analysis and simulation of this new machine are investigated in the paper.

The concept of partial conversion of existing tower phase arrangements to hybrid HVAC/HVDC overhead lines has become an attractive solution to meet the demand for higher power transmission capacity. Due to mutual AC/DC coupling effects, corona phenomena such as audible noise can be affected and have thus to be predicted accurately. In this paper, existing empirical equations are used to predict...

This paper presents a Hybrid Two Quasi Z-source(HTQZS) DC-DC converter for photovoltaic applications. These are mainly employed to full fill the demand of the voltage boost in photovoltaic applications from the lower value voltage. The traditional z source networks have some limitations in voltage boosting, so the modified z source means the different combination of the LC components is combine...

In this paper, we extend the language we proposed in [11] to make it possible to program arc-consistency algorithms. We also propose a hybrid algorithm that integrates the interval-consistency (IC) and arc-consistency (AC) algorithms. For a constraint, the algorithm checks IC when it is non-binary and checks AC when the constraint turns into binary. The algorithm is well-balanced. Its reduction...

AC/DC hybrid microgrids are becoming potentially more attractive due to the proliferation of renewable energy sources, such as photovoltaic generation, battery storage systems, and wind turbines. The collaboration AC sub-microgrids DC improves operational efficiency when multiple types power generators loads coexist at distribution level. However, voltage stability analysis software validation ...

objective: the aim of this study was to evaluate the influences of reconstruction and attenuation correction on the differences in the radioactivity distributions in 123i brain spect obtained by the hybrid spect/ct device. methods: we used the 3-dimensional (3d) brain phantom, which imitates the precise structure of gray mater, white matter and bone regions. it was filled with 123i solution (20...

UNLABELLED In routine PET, a 10- to 20-min transmission scan with a rotating (68)Ge source is commonly obtained for attenuation correction (AC). AC is time-consuming using this procedure and could considerably be shortened by instead using a rapid CT scan. Our aim was to evaluate the feasibility of CT AC in quantitative myocardial perfusion PET using a hybrid PET/CT scanner. METHODS (13)N-lab...

The interaction mechanism between AC and DC systems in a hybrid AC-DC transmission grid is discussed with PSS/E software. Analysis shows that receiving-end AC faults may cause much more damage on the HVDC system operation than the sending-end AC faults in a multi-infeed HVDC system, and the damage severity depends on the power recovering rate of the HVDC systems. For HVDC systems with slow powe...

This paper investigates the performance of line commutated converter (LCC) based monopolar HVDC transmission system feeding a weak AC network with hybrid reactive power compensators (RPC’s) at the inverter AC side. The hybrid compensator is an equal mix of any two of the following compensators: synchronous compensator (SC); static var compensator (SVC); static synchronous compensator (STATCOM)....

Abstract: Today's need for transmission capacity is continuously growing. As it is difficult to obtain new rights-of-way, options such as replacing existing ACby DC-lines to maximize the power capability of existing corridors are required. So as to limit land use, overhead transmission lines have been built as multi-circuit AClines on the same structure in many countries. Changing one AC circui...