This paper presents a new algorithm for distribution system reconstruction planning based on Mamdani type fuzzy inference and BellmanZadeh multi criteria decision making method. The proposed algorithm takes system attributes as inputs (number of customers served by renewed infrastructure, energy losses, power demand and cost of investment) and returns crisp output values which are used as planning criteria. The aim of this paper is to provide a logical decision making framework which can be used to model, evaluate, and rank projects according to required criteria. The proposed model is flexible and can be extended to include additional planning criteria. The proposed method is tested on a realistic distribution system to demonstrate its relevance. It is expected that this paper will make a contribution toward more effective management of power distribution network planning process and that it will be used by planning engineers in practical problems.

Use of renewable energy sources for the purposes of electricity generation is increasing throughout the world. Connection of new generators, however, introduces significant challenges to power network operators and managers. The power system transient stability is affected by the grid connection of new generation units. The objective of this paper is to investigate asynchronous generator dynamic response issues and capabilities under three phase symmetrical fault conditions and to propose a methodological approach to designing a generator transient stability solutions. Analysis and methodology are introduced through a realistic generator connection example. Simulations show that power system stability can be significantly affected by the connection of new generators and that this phenomena needs to be carefully considered during the connection planning process. This paper is a part of an ongoing research on the distributed generation impact on power network and its aim is to provide two main contributions to the existing body of knowledge. Firstly, it is expected that this paper will contribute toward a better understanding of the influence that generators have on the power system transient stability. Secondly, this paper is expected to contribute towards the practical understanding of fundamental power system transient stability improvement solutions.

Electricity distribution network planning is a complex optimization process which requires assessment of various planning criteria. Planning is performed under conditions of system constraints, extreme uncertainty and information imperfection. It is possible, however, to obtain precise output value from imprecise input variables, in a process of fuzzy control. This paper proposes the application of Mamdani type fuzzy inference in modelling the risk of service interruption as one of the criteria used in distribution network planning.

Power system stability issues are extremely important for safe and effective operation of the system. They can be categorized as rotor angle, frequency and voltage stability issues. Grid connection of new generators can have significant impact on overall system performance and stability. This paper presents investigation of a wind farm transient stability under symmetrical three phase fault conditions. Theoretical background of induction generator, its simulation model and dynamic response analysis procedure is discussed through a realistic wind farm connection example.

In the second decade of 21st century there are still too many households without electricity supply in Bosnia and Herzegovina. They are situated in remote, sparsely populated, rural areas where distribution power lines were completely destroyed during the last war. The restoration requires large investments in power grid extension. The decreasing price of renewable energy installations and significant solar, wind and hydro energy potential in Bosnia and Herzegovina make a renewable energy based micro power system (MPS) worth considering as a feasible and cost-effective alternative. Optimal design of such system depends on several factors such as renewable energy sources (RES) potential for a specific site, load requirements, the required level of reliability, fuel price, etc. The paper investigates application possibilities of RES based MPS for rural electrification in Bosnia and Herzegovina. Four representative rural sites in different geographical and climatic regions were chosen to simulate load requirements and system production, based on a one year input data. Comparative analysis of wind and solar resources potential for each site is given as an input to the feasibility assessment of the MPS. The optimal design of MPS is proposed based on an energy production analysis and financial viability analysis for each site under investigation. A sensitivity analysis is conducted in order to determine how system parameters and total cost may change if the system is designed with different reliability criteria.

Electricity networks have traditionally been built and managed by government owned, vertically integrated companies. Modern systems are undergoing significant organizational, structural and technological changes. These changes are driven by two processes. The first process is market liberalization which requires reorganization of state owned monopolies, unbundling, establishment of independent system and market operator and regulatory authority. The second process is the energy transition from conventional energy sources to renewable energy. These two processes present a new energy paradigm. The process of market liberalization is mature in European Union while its practical initiation is still expected in Bosnia and Herzegovina. Important step for Bosnia and Herzegovina is integration in Southeastern Europe Regional Electricity Market. European Union policy goal is creation of a single Internal Electricity Market. This implies that electricity future of Bosnia and Herzegovina lies within the large European Electricity Market. This paper investigates Bosnia and Herzegovina's sector and market specific policy priorities, challenges and opportunities with respect to electricity market liberalization and integration process. Main objective of this paper is to present current situation of electricity market in Bosnia and Herzegovina, identify steps required to achieve full market liberalization and assess the regulatory framework required to face challenges of a new energy paradigm. This research seeks to determine what are the opportunities and challenges of electricity market liberalization in Bosnia and Herzegovina and how do the regional integration help in overcoming current and future energy challenges. Research is undertaken by collecting and analyzing relevant electricity consumption and production data and relating them to specific market and structural policies within national and regional framework. It was determined that sector specific priorities are unbundling, restructuring and reorganization. Market specific issues such as demand and supply side imperfections can only be partially solved within national framework. Regional regulatory issues, interconnection management and global investment policy cannot be adequately managed from the national perspective and need to include adequate regional coordination mechanisms. Key words: regional electricity market, deregulation, liberalization.