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It is suggested to use the topological task for select the placement of distributed generation source. A topological task can not be solved by methods of functional analysis, because it is a problem with variable parameters. The algorithm of modeling for solving the topological task is proposed. The solution of the topological problem is significantly influenced by the parametric features of the object,...
This paper proposes a mixed-integer quadratic programming (MIQP) model for optimal day-ahead distribution networks dispatch considering Wind Generators (WGs) and topology reconfiguration. Firstly, linearized current injection model is introduced for generators by a series of approximations. Then the day-ahead Switching Operations (SOs) of reconfiguration could be calculated in a linear form based...
A fast power service restoration method for distribution network with DG is proposed in this paper. Firstly, a network simplification and multi-layer description method is presented. Secondly, on the basis of the network simplification and description, the studied restoration problem is analyzed equivalently in an equivalent calculating network and it is turned into a knapsack problem whose mathematical...
Benefit from the caching hits on the routers along the request routing path, in-network caching plays an important role in diminishing the distance between the consumers and their desired contents. A content caching model is proposed to intuitively analyze the small world characteristics of in-network caching in information centric networks. A directed long edge from a caching node to the provider...
The modern Distribution Systems (DS) require for accurate and fast Power Flow (PF) algorithms as a basis for other DS applications. Almost all decisions are taken based on accurate PF results and, possibly, they have to be taken in real time. In this paper, a new PF algorithm based on a linear programming approach is proposed. The graph theory is used for modeling the distribution network with some...
Load flow solution is required for determining a steady-state condition of electric power systems for various load demands. This motivated the development of several methods for load flow calculation in transmission and distribution systems. However, there are some scenarios of meshed operation in distribution systems that pose additional challenges for the direct application of load flow calculation...
The increasing penetration of distributed generation (DG) could cause positive and adverse impacts on distribution power grids. The study of these effects could lead to methodological guidelines for sizing and location of renewable energy sources. In this paper several simulations of a distibution system of MV with different locations and penetration levels of DG are performed. Performance parameters...
The conventional structure of distribution grids has been changing due to the inclusion of distributed generation (DG) near to consumption centers. This inclusion could have several impacts on chargeability and voltage levels of the distribution systems. In this paper positive and negative impacts of DG penetration are characterized in terms of sizing and location of the DG. Three scenarios of DG...
This paper aims to identify the critical line on the basis of power system cascading failure search. The proposed critical line identification strategy considers the factors of power flow and topology. Accordingly the electrical betweenness and transmission power are employed during analysis, of which the corresponding theoretical basis is deduced in simple systems. Next follow-up step is to apply...
In Satellite ATM (SATM) networks, the various traffic patterns and dynamically changing topology call for effective network traffic control mechanisms to reduce congestion and utilize network resource efficiently. There are two major challenges in the SATM traffic control. On one hand, the time varying traffic arises big challenges for guaranteed service in ATM. On the other hand, due to the permanent...
Abstract-In this paper, we develop a flexible and accurate analytical model of large networks with random base station (BS) placement, in order to understand the impact of key network parameters like BS density and load on the network performance. The main goal is to understand the flow level dynamics of such a system, assuming non-saturated users and studying the congestion statistics for BSs and...
This paper presents the main outcomes of the ESA funded project entitled: “SPACEMAN — A SpaceWire Network Management Tool” that was jointly carried out by ITTI Sp. z o.o. and TELETEL SA., and dealt with SpaceWire Network Discovery and Configuration Protocol (SpW-NDCP). We give a brief overview of the SpW-NDCP, present the main features of the SPACEMAN tool for discovering and configuring SpaceWire...
Topologies with strong invulnerability and high reliability has become an important issue in the development of Wireless Sensor Networks (WSNs). In this paper, WSNs is modeled as a weighted network which the load of nodes is considered as the weight of nodes. Thus, the problem of balancing the load turns into the problem of balancing the weight of the network. A load-aware and energy-aware local world...
This paper studies the impact of communication network on the performance of reconfiguration of networked microgrids. Various communication network topologies can be used to support the microgrid operation, each offering a set of advantages and disadvantages on the performance of reconfiguration. Network Simulator 3 (NS3) is used for the communication system simulation. A test system with two proximal...
Active distribution network (ADN) has gradually become a trend of future distribution network. The increasing distributed generations (DGs), demand-side controllable intelligent devices, energy storage devices and advanced secondary equipment are not fully considered in traditional planning methods. Key elements of ADN planning are introduced. A modified planning process is put forward. Load forecasting...
In this paper we review and expand our previous work on developing random topology networks as a way to generate synthetic power grid data. We first present an algorithm that is able to generate the small-world “eletric” topology appropriate for a transmission network. Next we re-examine the definitions of the proposed numerical measure called “Bus Type Entropy”, to characterize the correlated assignment...
The purposes of Software Defined Network (SDN) is for transforming the existing network, simplifying network operations and improving the network performance by separating the data plane and controller plane in traditional network. A quantitative evaluation model based on path allocation is proposed by using the centralized control system in SDN. First of all, the modeling according to network topology...
The fault-tolerance control in scale-free wireless sensor networks against cascading failure is analysed in this paper. Based on the node load redistribution and constant capacity of the scale-free wireless sensor networks, a new load distribution model is proposed under a single random node failure. By the probability generating function method, the relationships between the load and the largest...
Performing co-simulation studies on transmission and distribution systems software environments requires linking the transmission system elements in the former with highly detailed distribution network models and probabilistic load models in the latter. This paper presents a two-step algorithm for: (i) creating a scalable distribution system in a bottom-up approach to match the connected load at the...
This paper reports extensive simulations of the dynamic routing techniques for optical burst switching (OBS) networks. It gives a summary of the already proposed algorithms and describes more broadly some of them. It introduces also a new one called the Weighted Link Congestion and Frequency (WLCF) algorithm. Our comparative simulations are performed using an in-house developed environment in which...
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