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Large Offshore wind farms are planned in China and some are under constructions. DC grid or multi-terminal HVDC is the promising technology to delivery large offshore wind power over long distances. DC grid voltage levels need to be built to design optimal DC grid, without this voltage levels, DC grid may be sub-optimal, not cost-effective. This paper proposes the study framework of building voltage...
Power-to-Gas can contribute with valuable balancing power and seasonal storage capacity to future power systems. In Portugal, forecasts for 2020 show significant excess of renewable energy generation that can be transformed by power-to-gas technology and fed into the natural gas infrastructure. This work suggests an innovative approach to assess future power-togas integration potentials at the national...
In isolated electricity networks the penetration of renewable energy sources offers, among others, the advantage of distributed electricity. At the same time, as penetration levels increase, controls and regulations need to be imposed in order to alleviate rising grid integration issues. Some of these can be prevented through the use of dynamic tariffs enabling Demand Side Management. In this work,...
A full Cost-Benefit Analysis (CBA) of a meshed offshore grid in the Northern Seas with respect to radial configurations has been performed. In this CBA, three scenarios have been analysed: the ENTSO-E Vision 4 scenario with 111 GW of offshore wind, the PRIMES reference scenario with 70 GW of offshore wind, and the NSCOGI scenario with 55 GW of offshore wind. The offshore grid infrastructure cost is...
This paper aims at assessing the power system reliability by estimating loss of load (LOL) index using mutual information based Bayesian approach. Reliability analysis is a key component in the design, analysis and tuning of complex structure like electrical power system. Consideration is given to rare events while constructing the Bayesian network, which provides reliable estimates of probability...
Frequency containment reserves (FCR) or formerly called primary reserves are a major component for the stability of the continental Europe power grid. Up to now, mainly gas power plants are providing FCR and their ongoing decreasing profitability in Europe has a non-negligible impact on the FCR provision cost. In this paper, the concept of FCR with large deadband is introduced and discussed. We show...
This paper discusses the problems of design and implementation of complex set of interconnected online and offline planning, optimization and monitoring tools of Swiss Transmission System Operator Swissgrid. After analyzing the requirements and challenges of the system, the paper presents its realization concept, as well as implementation results and the future plans. Solution under discussion widely...
The Dutch Transmission System Operator TenneT TSO B.V. is responsible for the Dutch electricity grids with voltages of 110 kV to 380 kV. The company is required to guarantee the Security of Supply at all times, and must comply with both national and international legislation and agreements. Economic efficiency and market facilitation are prompting an increase in interconnection capacity between European...
At present, European countries are seeking ways to reduce carbon emissions. To achieve this, they have set ambitious emissions reduction goals. Thus, in this paper, a novel strategic planning methodology is used in order to determine the most appropriate power system for Europe by the year 2050. The planning methodology jointly optimizes generation and transmission expansion alternatives considering...
Transmission system planning aims to determine a resilient and cost effective expansion plan. But finding an optimal plan is a tough combinatorial challenge in large networks. In this paper, an Automated Network Planning Process (ANEPP) is introduced. Two different heuristic approaches to select additional network branches are implemented in the ANEPP: The Local Search (LS) and the Particle Swarm...
In this paper we present a merging procedure which is used to build a consistent description of the European network based on the data provided by the different Transmission System Operators (TSOs). In order to deal with inconsistencies in the data, we introduce a modified Optimal Power Flow (OPF) minimizing the deviation from TSOs data. Results on the European network demonstrate the interest of...
Recent studies have discussed the operational challenges in the European power system which come along with the increasing penetration of intermittent generation in the coming years. Based on time sequential Monte Carlo simulations, this paper investigates to what extent a decentralized frequency control structure is appropriate with respect to three European scenarios. To evaluate the future adequacy...
Swissgrid (the Swiss TSO) introduced a new framework for real-time network security management supported by three main pillars: a) a revised operational planning procedure; b) a near real-time decision support tool performing an unambiguous optimal redispatch of power plants based on an AC security-constrained optimal power flow (AC-SCOPF); and c) a financial incentive for power plants involved in...
The unbundling of power market and continuous increase of renewable generation over the years has resulted in bulk power transmission over long distances and cross-border links. Moreover, Integration of renewable generation is set to increase every year to fulfil EU's vision and other country specific goals. These require an expansion of existing conventional AC transmission network to hybrid/meshed...
This paper reports results of extending the iTesla Modelica Power System Library with the implementation of new Modelica models for power electronic-based FACTS (Flexible AC Transmission System) to be used in phasor time-domain simulations. To show the applicability of Modelica for modeling FACTS devices and power system simulation, a software-to-software validation is performed against the Power...
DC Independent System Operator (DC-ISO) is a single entity dedicated to coordinate, to control and monitor the operation of the DC transmission system. It will be responsible for ensuring the reliability and security of the multi-terminal HVDC (MTDC) system in real-time and co-ordinate the supply of and demand for electricity, in a manner that avoids violations of technical and economic standards...
In view of the challenging policy objectives of security of supply and economic efficiency within the liberalized background of the last decades, European electricity markets have developed different dispatch arrangements to coordinate power systems' balancing operations, namely Central Dispatch or Self-Dispatch arrangements. This paper presents a model for the Integrated Scheduling Process of Central...
Large amounts of offshore wind power plants (WPP) connected through voltage sourced converter high-voltage DC (VSC-HVDC) technology can have significant consequences for the dynamic behavior of the related onshore AC systems. This paper explores the rotor angle stability effects of the integration of 35 GW of wind power in the North Sea, connected to the European mainland, Nordic, and UK power systems...
In this paper an algorithm for the solution of the European electricity market coupling is presented, considering all block and complex orders available in the European Power Exchanges. The model takes into account the clearing conditions of profile and regular block orders, linked block orders, exclusive group of block orders and flexible hourly orders, as well as the clearing conditions of Minimum...
This study investigates the energy implications of various pathways of China's power decarbonization in terms of RES power penetration and coal consumption. It complements our previous work in [1] which stressed the economic effectiveness and CO2 emission reductions. Based on the results of these two works, here we analyze the trade-offs of the energy-environmental-economic (3E) objectives of the...
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