Anna Mutule

Dynamic Management of Sustainable Development

Dynamic management of sustainable development , Dynamic management of sustainable development , کتابخانه دیجیتال جندی شاپور اهواز

Fulfilment of Criteria of Electricity Supply Reliability in the Baltic Region

Fulfilment of Criteria of Electricity Supply Reliability in the Baltic Region The paper analyses the reliability of power supply for a 330/750 kV electrical ring. Consideration is also given to the influence of emergency automatics on the maximum permissible power flows in different electrical connection points of the ring as well as to the application of reliability criterion (N-1) in the case of using the emergency automatics to limit post-accident power flows in these points. The authors discuss the role of operative and technological management in securing the power supply reliability. They also analyze situations with disconnection of major generation units and its influence on the blackout development. Par Elektroapgādes Drošuma Kritēriju Izpildi Baltijas Valstu Regionā Šajā rakstā dota 330 kV un 750 kV elektriskā gredzena drošuma problēmu analīze un novērtējums. Pielietoto automātikas iekārtu ietekme uz maksimāli pieļaujamām jaudas plūsmām elektriskā gredzena atsevišķos šķēlumos. Drošuma kritērija (N-1) pielietojums gadījumos, ja tiek izmantotas pretavārijas automātikas, kas ierobežo pēcavārijas jaudas plūsmas elektriskos šķēlumos. Operatīvās un teh-nologiskas vadības loma elektroapgādes drošuma kritēriju paaugstināšanai. Lielu generējošo jaudu avārijas atslēgšanās iespējas un ietekme totālās avārijas izraisīšanai.

PMU Measurements Application for Transmission Line Temperature and Sag Estimation Algorithm Development

This paper gives an insight in synchrophasor technologies and proposes an overall framework for estimating power transmission line parameters, by employing synchronous phasors in real time. Based on estimated line parameters, the average line temperature and the sag of selected spans can be calculated and utilized for dynamic thermal rating applications for increased power transfer.

The Baltic Power System Between East And West Interconnections

Due to historical and geographical reasons, the Baltic States are strongly connected to the power (electricity) transmission grids of Russia and Belarus. Current energy security and energy independence targets in the EU trigger seeking for alternative power sources for the Baltic. Knowing that, a power system model of the Baltic States has been developed and validated with the purpose of providing comparative options for a reliable and secure development of the Baltic electricity system. The analysis of horizon 2020 and 2030 showed that the dependency of Baltic States on the outside resources is fairly low, provided that the expansion of the electricity system goes as planned.

Efficient identification of opportunities for Distributed Generation based on Smart Grid Technology

The paper presents the main goals and achievements of the Smart Grids ERA-NET project named “Efficient identification of opportunities for Distributed Generation based on Smart Grid Technology (SmartGen)” during the second stage of project implementation. A description of Smart Grid Technology (SGT) models developed within the framework of the project is given. The performed study cases where the SGT-models were implemented to analyze the impact of the electrical grid are discussed.

Optimization Method of Power System Development under Uncertainty

Paper presents optimization method of power system development under uncertainty. Method is used for LDM family. Laboratory of Electric Power System Simulation worked out software of Latvian dynamic model (LDM) family. All softwares of LDM family ensure possibilities: 1) to eliminate investments, which increase prime cost, 2) to arrange the required investments by their efficiency. The databases LDM are formed by joining gradually network objects. In comparison with previous software systems of LDM family, the new systems have considerably simplified input and this considerably diminishes error probability

Smart Grid Development: Multinational Demo Project Analysis

Abstract This paper analyses demand side management (DSM) projects and stakeholders’ experience with the aim to develop, promote and adapt smart grid tehnologies in Latvia. The research aims at identifying possible system service posibilites, including demand response (DR) and determining the appropriate market design for such type of services to be implemented at the Baltic power system level, with the cooperation of distribution system operator (DSO) and transmission system operator (TSO). This paper is prepared as an extract from the global smart grid best practices, smart solutions and business models.

Demand side management platform for HAN flexibility estimation

The content of the paper is focusing to demand side management platform elaboration for optimal energy management strategies, topicality of smart metering & control including deployment of the price responsive demand. Presented tests are performed in Smart Grid Research Centre research facility Demand Side Management-Smart Home Lab with the aim to achieve the rational use of energy, demonstrate first steps of implementation home automation system with automated energy consumption scheduling units for load flexibility and controllable portion estimation.

Methods for Estimation of the Riverflow Potential for Hydrokinetic Power Generation

Abstract The authors propose methods for estimation of the potential of riverflows for electricity production at hydrokinetic power plants. The methods can be applied to any river or its span where it is possible to move using a floating means. The methodical part includes validation of the flow velocity and bed depth measurement data using the available statistics as well as a case study. Analysis of the in-river measurement results for the selected spans of river Daugava shows that the flow rate variations exert only a minor influence on the flow velocity at particular sites. This testifies the hydrokinetic power plants as stable and predictable sources of electrical energy, both in a long term and, especially, in a short one. The proposed estimation methods could be useful in explorations of rivers, making them simpler and cheaper. Kopsavilkums Rakstā ir aprakstīta metodika upes posmu potenciāla novērtēšanai elektroenerģijas ražošanai ar hidrokinētiskajām iekārtām. Metodiku var izmantot jebkuras upes vai upes posma vērtēšanai, kurā iespējams pārvietoties ar laivu vai citu peldlīdzekli un noturēt šo peldlīdzekli nekustīgu attiecībā pret upes krastiem. Metodika atvieglo un samazina izmaksas turpmākiem pētījumiem. Straumju ātruma mērījumu datu validācijai un papildus informācijai upju (posmu) novērtēšanai, ļoti noderīgi ir upju novērojumu staciju statistiskie dati par upju caurteces apjomiem. To izmantošana ir iekļauta metodikā un tās lietošanas piemērā. Balstoties uz Daugavā veikto mērījumu analīzi, ir secināts, ka caurplūdes izmaiņas maz ietekmē straumes ātrumu konkrētajā vietā. Tas apliecina, ka hidrokinētiskās iekārtas ir stabils un viegli prognozējams elektroenerģijas avots gan ilgtermiņā, gan, jo sevišķi, īstermiņā.

MATLAB and PowerWorld based virtual laboratories development for undergraduate students on electrical systems

This paper describes the pilot realization of virtual laboratory using MATLAB and PowerWorld environments for the undergraduate students in the field of Power Systems. A description of laboratory works, tasks and visualization of the performed models is given. The preference of using software type education rather than hardware one has the opportunity for flexibility of models. The first year experience is reported, and outcomes for future work are outlined.