12 Results for the search " Load":
Active Harmonic Filter
Description:The shunt filter injects the current that is defined as the error between the (non-linear) load current and the fundamental harmonic. The filter uses a 3-level inverter and the 2-level hysteresis curr... see moreent control.
Tag(s): filter, AHF, active filter
Load-flow voltage violation assessment
Description:This example shows a way to automatically detect voltage violations of the load-flow results.
Users can set low and high limits for each bus (for example 0.95pu-1.05pu).
Tag(s): voltage, violation, load-flow
Change load power from an external file
Description:This example illustrates how to read data from an external file and automatically update devices parameters in the design. In this example, the device is a load.
Double click on Update Parameters... see more device to start the script.
Tag(s): script, parametric, file, external, automate, Load
MIMO-OFDM Narrowband-PLC in Distribution Systems: Impact of Power Transformers on Achievable Data Rates
Description:Power-line communication (PLC) is gaining a renewed interest, due to the smart grid (SG) emerging communication requirements. Among other communication technologies, PLC is a very efficient and feasib... see morele solution, especially for the extended SG distribution networks. However, it is very challenging to consider both the medium- and low-voltage parts of the distribution network as a whole communication medium, due to the attenuating effects of distribution transformers, limiting PLC applicability. In this paper, data transmission through distribution transformers is investigated by means of multiple-input multiple-output (MIMO) narrowband power-line communication (NB-PLC) system, utilizing orthogonal frequency-division multiplexing (OFDM) technology. Multi-conductor distribution line and measurement-based transformer models are developed to characterize the MV-LV PLC channel. In addition, OFDM signal processing techniques are applied to enhance the achievable data rates. The transmit power budget and bit allocation across the OFDM sub-channels of the spatial beams are optimized to maximize the data rate through the distribution transformer. The achievable data rates are calculated and systematically analysed for different scenarios to investigate the effects of the distribution lines, connected loads, noise models, etc. Results reveal the superiority of the proposed MIMO design against the traditional SISO systems. In addition, the possibility for an extensive and reliable application of MV-LV PLC communications through distribution transformers is shown.
Tag(s): Distribution lines, distribution transformers, MIMO-OFDM, power-line communication, smart grids
lCT -power Co-simulation Platform for the Analysis of Communication-based Volt/Var Optimization in Distribution Feeders
Description:The paper presents an ICT and power co-simulation platform for the analysis of the voltlvar control and relevant optimization in medium voltage distribution feeders, achieved by means of a system of d... see moreistributed controllers coordinated via a shared band-limited digital communication network. The platform has been built by realizing the interface between two specific simulation environments:
the Electromagnetic Transient Program EMTP-RV and the communication network simulator Opnet Modeller. The preliminary results provide basic indications on the expected performances of the considered communication-based strategies for ditJerent tratlic congestion levels and load/generation dynamic variations.
Authors: Riccardo Bottura, Alberto Borghetti, Fabio Napolitano, Carlo Alberto Nucci
Tag(s): Co-simulation, Networked Control Systems, Power distribution feeders, Voltlvar optimization.