Dynamic analysis of induction machine driven electric vehicles based on the nonlinear accurate model

Makrygiorgou, Jemma J.; Alexandridis, Antonio T.

doi:10.1109/med.2016.7535951

Cited by 3 publications

(2 citation statements)

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“…As shown in Figure 5, the power injected to the system by Source 1 changed from 80% to 90% of , , i.e., became 0.9 from an initial value of 0.8, at t = 10 s, while the supply provided to the system by source 2 changed from 60% to the 80% of , , i.e., became 0.8 from an initial value of 0.6, at t = 20 s. In a similar way, and taking into account the local constant power loads, changes occurred with the source currents around their nominal values I in,1 , I in,2 , by varying the coefficients a 1 and a 2 . As shown in Figure 5, the power injected to the system by Source 1 changed from 80% to 90% of I in,1 , i.e., a 1 became 0.9 from an initial value of 0.8, at t = 10 s, while the supply provided to the system by source 2 changed from 60% to the 80% of I in,2 , i.e., a 2 became 0.8 from an initial value of 0.6, at t = 20 s. The system parameters were taken from [34,35] and are provided in Table 1, while all of the controllers' gains are given in Table 2. The system parameters were taken from [34,35] and are provided in Table 1, while all of the controllers' gains are given in Table 2.…”

Section: The Examined Case Studymentioning

confidence: 99%

“…As shown in Figure 5, the power injected to the system by Source 1 changed from 80% to 90% of I in,1 , i.e., a 1 became 0.9 from an initial value of 0.8, at t = 10 s, while the supply provided to the system by source 2 changed from 60% to the 80% of I in,2 , i.e., a 2 became 0.8 from an initial value of 0.6, at t = 20 s. The system parameters were taken from [34,35] and are provided in Table 1, while all of the controllers' gains are given in Table 2. The system parameters were taken from [34,35] and are provided in Table 1, while all of the controllers' gains are given in Table 2. Table 1.…”

Section: The Examined Case Studymentioning

confidence: 99%

See 1 more Smart Citation

Stability Analysis of DC Distribution Systems with Droop-Based Charge Sharing on Energy Storage Devices

Makrygiorgou

Alexandridis

2017

Energies

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Direct current (DC) distribution systems and DC microgrids are becoming a reliable and efficient alternative energy system, compatible with the DC nature of most of the distributed energy resources (DERs), storage devices and loads. The challenging problem of redesigning an autonomous DC-grid system in view of using energy storage devices to balance the power produced and absorbed, by applying simple decentralized controllers on the electronic power interfaces, is investigated in this paper. To this end, a complete nonlinear DC-grid model has been deployed that includes different DC-DERs, two controlled parallel battery branches, and different varying DC loads. Since many loads in modern distribution systems are connected through power converters, both constant power loads and simple resistive loads are considered in parallel. Within this system, suitable cascaded controllers on the DC/DC power converter interfaces to the battery branches are proposed, in a manner that ensures stability and charge sharing between the two branches at the desired ratio. To achieve this task, inner-loop current controllers are combined with outer-loop voltage, droop-based controllers. The proportional-integral (PI) inner-loop current controllers include damping terms and are fully independent from the system parameters. The controller scheme is incorporated into the system model and a globally valid nonlinear stability analysis is conducted; this differs from small-signal linear methods that are valid only for specific systems, usually via eigenvalue investigations. In the present study, under the virtual cost of applying advanced Lyapunov techniques on the entire nonlinear system, a rigorous analysis is formulated to prove stability and convergence to the desired operation, regardless of the particular system characteristics. The theoretical results are evaluated by detailed simulations, with the system performance being very satisfactory.

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