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Electrical distribution networks worldwide are facing frequent capacity challenges due to the widespread roll out of various distributed energy resources (DERs). A number of demand response (DR) mechanisms have been developed in order to circumvent the problems and enhance the flexibility of the distribution network. While the existing centralised control system remains its crucial role for reliable...
This paper introduces the basis-adaptive sparse polynomial chaos (BASPC) expansion to perform the probabilistic power flow (PPF) analysis in power systems. The proposed method takes advantage of three state-of-the-art uncertainty quantification methodologies reasonably: the hyperbolic scheme to truncate the infinite polynomial chaos (PC) series; the least angle regression (LARS) technique to select...
Rapid proliferation of the Distributed Energy Resources (DERs) is posing major operational challenges like congestions and voltage limit violations in the distribution networks. A number of direct and market-based control strategies are being widely developed to address these challenges. While the direct approaches aim to control the loads directly, the market-based control influences individual prosumers...
Increasing penetration of distributed renewable energy sources such as PV may lead to voltage rise in the LV distribution networks. When local production exceeds local consumption, this voltage rise may lead to overvoltage, i.e. violation of the EN 50160 standard. A number of solutions have been developed to mitigate the over voltage, thus increasing the hosting capacity of the LV network without...
Penetration of distributed renewable energy sources in low-voltage (LV) networks is increasing steadily. This trend helps the vision of sustainability, but it is hindered by various economic and technical constraints. Some of the existing solutions put some customers in a disadvantageous position, which is often overlooked while developing technical solutions. In this paper, the most common solutions...
This paper presents an approach for modelling the charging probability of electric vehicles as a Gaussian mixture model. The model is built up by assembling adapted multivari-ate normal probability density functions. This is done because the expectation maximization algorithm fails finding maximum likelihood estimates in respect of the charging power of the generated charging profiles. This Gaussian...
Normal operation of an active distribution network (ADN) requires simultaneous optimization of different objectives of the various involved actors. This results in a multi-objective optimization problem which has not yet been treated completely. This paper considers a particular relationship between commercial and technical coordination, involving capacity management of the distribution network. First,...
The current transition from passive to active electric distribution networks comes with problems and challenges on bi-directional power flow in the network and the uncertainty in the forecast of power generation from grid-connected renewable and distributed energy sources. The power flow management would need to be distributed, flexible, and intelligent in order to cope with these challenges. Considering...
This paper investigates the impacts of distance and power flow of transmission line interconnections on the inter-area oscillations. The effectiveness of Power System Stabiliser (PSS) in damping the inter-area oscillations is studied considering various combinations of interconnection power flows and distances. Simulations are carried out on a two area 4 generator test system as well as on the simplified...
Future power infrastructure will have a significant contribution from renewable energy sources. Ability to handle the challenges arising from these private-owned time-varying and poorly predicted sources is vital for the feasibility of such future power systems. An active network concept has been proposed as a potential solution for distributed generation (DG) introduction. In this paper, an simplified...
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