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This paper introduces and compares a decentralized and centralized model predictive control scheme for power tracking in a multi-terminal HVDC system based on MMCs. The MPC scheme requires a prediction, which is implemented by treating the HVDC system as a black box. With this approach it is possible to use an MPC scheme without detailed knowledge about the controlled system, which eases the design...
Aiming to improve their performance in solve operation center's function, the power utilities have invested in strategies to contribute with the effectiveness of their resources, reducing the costs of provided services and ensuring the continuity and quality of the distributed energy. Considering the orders dispatch to repair crew, that respond for service demands, this paper proposes a predictive...
Due to environmental consideration, natural ester was developed as liquid insulation for high voltage transformer. This paper reports the Dissolved gas Analysis (DGA) and Fourier Transform Infrareed (FTIR) Spectroscopy of Thermally-Aged Natural Ester-paper composite. The sample used were natural ester from palm oil and kraft paper insulation. The samples used in these experiments were natural ester...
Chemical changes along the surface of silicone rubber material due to partial arcs and dry band arcing were studied in this paper. Rectangular samples of silicone rubber were used for experiments and pollution was applied using the modified solid layer method based on IEC 60507. All tests were carried out in a climate chamber having temperature, humidity and fog rate control. Clean bands of 1 cm were...
The effects of environment pollution, climate change, and extensive use of fossil fuel for transportation are driving the trend to replace internal combustion engine vehicles by Electric Vehicles (EVs). One of the main concerns regarding the increased deployment of EVs is the effect on the grid. In contrast, EVs can provide opportunities to support the grid with Smart charging and Vehicle to Grid...
Thermal switching has attracted the research interest during the last decades. Phase Changing Materials (PCM) have the ability to vary their electric conductivity upon external stimuli such as heating and as a result they can be used as thermal switchers in transmission lines. Vanadium dioxide (VO2) is a PCM the electrical conductivity of which can be varied by 3–4 orders of magnitude, undergoing...
Multi-energy system (MES) operation calls for active management of flexible resources across energy sectors to improve efficiency and meet challenging environmental targets. Electric heat booster, a solution for Domestic Hot Water (DHW) preparation under Low-Temperature-District-Heating (LTDH) context, is identified as one of aforementioned flexible resources for electricity and heat sectors. This...
It is planned to create stability control system in real time by applying WAMS technology for maximum use of 500 kV transmission lines capacity. The pilot project of such system has been realized on two phasor measurement unit devices installed on 500 kV substations “Ekibastuzkaya” and “Alma”. At the moment in the National Electrical Networks (NEN) of Kazakhstan the modes monitoring has been realized...
The deployment of smart grid communication networks (SGCN) in urban areas has been possible due to the huge availability of wired and wireless communication technologies. However, in rural areas, those communications options are usually not available, unsuitable and/or too costly, making the deployment of a SGCN more challenging in such a case. On the other hand, the recently introduced low power...
Phase locked loop inverter synchronization method is the mostly used synchronization method for both single phase and three phase systems. Recent research has focused on the improvement of the performance of the phase lock loop inverter synchronization method under different grid conditions. The common phase locked loop synchronization techniques such as the Second Order Generalized Integrator based...
The focus of this paper is to report on analysis of partial discharge characteristics in insulation samples containing artificially created voids under AC and DC excitation. Samples were initially tested under AC conditions to determine that the artificial void was the dominant source of PD. Once this was proven the samples were tested under DC to generate knowledge on PD under these conditions. The...
This paper presents a preliminary study for a virtual reality simulation for testing the behavior of electric propulsion systems in electrical traction applications. The car model is realized and connected to the propulsion model in MATLAB Simulink whereas the inputs for the model are coming from the Virtual Reality Environment (VRE).
Electricity access is a key enabling factor for human development, yet over 1.2 billion people have no connection. Minigrids, grid extension and standalone systems are the standard approaches to electrification, but each have significant limitations, including cost of energy, speed of deployment and lack of flexible upgrade paths. Interconnection of minigrids and Solar Home Systems (SHS) to allow...
This paper develops a model to show the effects of soft errors on power flow calculations. We create artificial bit-flips and apply them to solve linear equations obtained in Fast Decoupled Load Flow (FDLF) method. With this, we aim to represent the sensitivity of FDLF iteration against soft errors with a statistical view by using different numerical fault injection scenarios. The study focuses on...
A conventional 3-level PWM Inverter and a Cascaded Multilevel Inverter, both rated at 230Vrms voltage output and 3KW are analysed using the Switching Function. The PWM signal for the 3-level inverter is derived by applying the Switching Function Technique to the equal area principle. For the Cascaded Multilevel Inverter the Switching Function Technique is initially applied to each H-bridge, and then...
This paper present modal and acoustic analysis for the stator of a permanent magnet synchronous machine, used for the propulsion of an electric scooter. In order to estimate the vibration behavior, modal analysis was numerically employed. For the electromagnetic noise level, again a numerical study was carried out in order to prove the fitting within the current standards.
The control of modern electrical power systems is, in some respects, limited by traditional analogue control methods. It is recognised that digital control can offer significant advantages in enhancing a power system's closed-loop performance and improve control implementation over traditional analogue methods. In particular, an electrical power system can exhibit optimum performance throughout its...
The study includes a comprehensive review of the existing literature and guidelines regarding the effects of sidewall force and tensile strain on power cables during installation. The most appropriate diagnostic test methods required to analyse these effects are also assessed. The results of tests and analysis of the existing literature are then combined in an attempt to determine a realistic basis...
Wind power has a significant impact on the operation of power grids. As the operation is planned some hours in advance, it is necessary to forecast the wind power. Besides, wind power forecasting techniques can be adapted for the overhead line rating forecasting. This can be useful for defining advanced strategies for grid operation and improve the power integration. This paper describes several works...
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