scholarly journals The Regulatory Framework for Market Transparency in Future Power Systems under the Web-of-Cells Concept

Energies ◽  
2019 ◽  
Vol 12 (5) ◽  
pp. 880 ◽  
Author(s):  
Viktorija Bobinaite ◽  
Marialaura Di Somma ◽  
Giorgio Graditi ◽  
Irina Oleinikova
Keyword(s):  
Electricity Market ◽  
Distribution System ◽  
Renewable Energy Sources ◽  
Voltage Control ◽  
The European Union ◽  
Market Transparency ◽  
Disclosure Of Information ◽  
System Operator ◽  
Wholesale Electricity Market ◽  
The Web

This paper investigates the regulatory rules of market transparency which could be applied within the wholesale electricity market and market for frequency and voltage control in the Web-of-Cells (WoC) decentralized power control architecture, which has been developed in the ELECTRA Project to respond the challenges and needs of the future power system (2030+). In this decentralized functional architecture for frequency and voltage control, the European Union (EU) power grid is divided into grid control areas, i.e., cells, which are defined as portions of the grid having adequate monitoring infrastructure and local reserves capacity, allowing voltage and balancing (frequency) problems to be solved at cell level, under the responsibility of a Cell System Operator (CSO) (present Distribution System Operator (DSO)/Transmission System Operator (TSO)). In order to foster the practical realization of the WoC-based architecture, the related wholesale electricity market and market for frequency and voltage control are proposed considering the competitive market principles, including transparency. The critical review of the existing EU regulations dealing with this issue suggests respecting the valid provisions on market transparency while tailoring them into the WoC-based architecture. Moreover, in order to take into account the WoC peculiarities, a set of integrations to the current regulatory rules is also proposed, addressing: (1) disclosure of information in respect to attributes of emerging technologies such as renewable energy sources (RES), distributed energy resources (DER), storage; (2) provision of generation and load forecast information; (3) process of procurement of flexibilities; (4) retail market transparency; (5) disclosure of privacy-sensitive household attributes; and (6) disclosure of information on market for frequency and voltage control.

scholarly journals Assessment of the Target Model Implementation in the Wholesale Electricity Market of Greece

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6397
Author(s):  
Filippos Ioannidis ◽  
Kyriaki Kosmidou ◽  
Kostas Andriosopoulos ◽  
Antigoni Everkiadi
Keyword(s):  
Electricity Market ◽  
System Capacity ◽  
Successful Implementation ◽  
The European Union ◽  
Wholesale Market ◽  
Target Model ◽  
Time Period ◽  
Unethical Behaviors ◽  
Wholesale Electricity Market ◽  
Of Greece

The European Union Target Model aims to integrate European energy market by removing barriers to trade and align markets. The most important goals of the Target Model are to provide consistent prices, enhance liquidity, support cross boarder trading, facilitate interconnections, and coordinate the use of transmission system capacity. In that context, the smooth operation of both forward and spot markets is a core development that directly affects the good operation of the wholesale market. This paper examines the application of the Target Model in the wholesale electricity market of Greece and its impact on electricity prices. The study explores the time period before the implementation of the Target Model, which took place on November 2020, and the first nine months of its execution. Based on the feedback received by the rest of the European countries, which are already part of the European Single Market, this crucial period of time is considered transitional, when many distortions and unethical behaviors take place. Empirical findings indicate a relatively successful implementation of the Target Model in Greece, with price disorders mostly met in the Balancing Market.

scholarly journals Reactive Power Management Considering Stochastic Optimization under the Portuguese Reactive Power Policy Applied to DER in Distribution Networks

Energies ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 4028 ◽  
Author(s):  
Abreu ◽  
Soares ◽  
Carvalho ◽  
Morais ◽  
Simão ◽  
...  
Keyword(s):  
Power Management ◽  
Distribution System ◽  
Power Flow ◽  
Optimal Power Flow ◽  
Reactive Power ◽  
Renewable Energy Sources ◽  
Distribution Network ◽  
Real Data ◽  
Distribution Networks ◽  
System Operator

Challenges in the coordination between the transmission system operator (TSO) and the distribution system operator (DSO) have risen continuously with the integration of distributed energy resources (DER). These technologies have the possibility to provide reactive power support for system operators. Considering the Portuguese reactive power policy as an example of the regulatory framework, this paper proposes a methodology for proactive reactive power management of the DSO using the renewable energy sources (RES) considering forecast uncertainty available in the distribution system. The proposed method applies a stochastic sequential alternative current (AC)-optimal power flow (SOPF) that returns trustworthy solutions for the DSO and optimizes the use of reactive power between the DSO and DER. The method is validated using a 37-bus distribution network considering real data. Results proved that the method improves the reactive power management by taking advantage of the full capabilities of the DER and by reducing the injection of reactive power by the TSO in the distribution network and, therefore, reducing losses.

scholarly journals Replacement Reserve for the Italian Power System and Electricity Market

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2916
Author(s):  
Mauro Caprabianca ◽  
Maria Carmen Falvo ◽  
Lorenzo Papi ◽  
Lucrezia Promutico ◽  
Viviana Rossetti ◽  
...  
Keyword(s):  
Power Systems ◽  
Power System ◽  
Electricity Market ◽  
Renewable Energy Sources ◽  
Real Data ◽  
Forecast Horizon ◽  
European Guidelines ◽  
Central Platform ◽  
System Operator ◽  
New Methodologies

Over the last years, power systems around the globe experienced deep changes in their operation, mainly induced by the widespread of Intermittent Renewable Energy Sources (IRES). These changes involved a review of market and operational rules, in the direction of a stronger integration. At European level, this integration is in progress, driven by the new European guidelines and network codes, which deal with multiple issues, from market design to operational security. In this framework, the project TERRE (Trans European Replacement Reserve Exchange) is aimed at the realization of a European central platform, called LIBRA, for the exchange of balancing resources and, in particular, for the activation of the procured Replacement Reserve (RR) resources. The Italian Transmission System Operator (TSO), TERNA, is a participant of the project and it is testing new methodologies for the sizing of RR and its required activation throughout the TERRE process. The aim of the new methodologies is to find areas of potential improvement in the sizing of RR requirements and activation, which open up the possibility for a reduction of the procurement cost, without endangering the security of the power system. This paper describes a new RR sizing methodology, proposed by TERNA, which is based on a persistence method, showing its results on real data and highlighting key advantages and potential limitations of this approach. In order to overcome these limitations, a literature review on alternative approaches has been carried out, identifying nowcasting techniques as a relevant alternative for the very short term forecast horizon. These one could be further investigated and tested in the future, using the proposed persistence method as a benchmark.

scholarly journals DSO Strategies Proposal for the LV Grid of the Future

Energies ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 6327
Author(s):  
Bartłomiej Mroczek ◽  
Paweł Pijarski
Keyword(s):  
Distribution System ◽  
Renewable Energy Sources ◽  
Power Conversion ◽  
Power Input ◽  
Operating Efficiency ◽  
Management Service ◽  
Strategy Selection ◽  
Volume Management ◽  
Significant Challenge ◽  
System Operator

A significant challenge for the DSO (Distribution System Operator) will be to choose the optimum strategy for flexibility service in the LV area with high RES (renewable energy sources) penetration. To this end, a representative LV grid operated in Poland was selected for analysis. Three research scenarios with RES generation were presented in the range of 1–8 kW for the power factor from 0.9 to 1. The grid PV capacity was determined for four load profiles. Based on this factor, optimum RES volume management service types were determined. Under the flexibility service, the proposed power conversion services and active RES operations for DOS were proposed. The research was conducted using the Matlab and PowerWorld Simulator environment. Optimum active power values were obtained for the RES generation function for single and dual operation systems of the power conversion system. In future, the knowledge in the field of grid capacity will enable the DSO to increase the operating efficiency of the LV grid. It will enable the optimum use of the RES generation maximisation function and proper strategy selection. It will improve the energy efficiency of the power input through the MV/LV node.

scholarly journals ADVANTAGES AND DISADVANTAGES OF THE CURRENT STATE OF ADMINISTRATIVE AND LEGAL REGULATION OF RELATIONS IN THE FIELD OF ELECTRICITY IN THE CONDITIONS OF UKRAINE'S EUROPEAN INTEGRATION

2020 ◽  
Vol 2 (4(106)) ◽  
pp. 123-129
Author(s):  
Д. А. Миколаєць
Keyword(s):  
Electricity Market ◽  
Energy Supply ◽  
Renewable Energy Sources ◽  
Legal Regulation ◽  
State Regulation ◽  
Electricity Sector ◽  
Local Networks ◽  
Advantages And Disadvantages ◽  
Current State ◽  
System Operator

The relevance of the article is that today, the use of electricity is an integral part of life and supports the normal implementation of the state social function, the function of protecting independence and territorial integrity. It is extremely important that the administrative and legal regulation of relations in the field of electricity meets modern socio-economic conditions, is independent of political factors and especially outside the legal and corrupt. The study of the current state of administrative and legal regulation of relations in the field of electricity will clarify the level of compliance and ways to improve the effectiveness of such regulation, its relevance. The article states that the distribution of electricity was not separated from the supply of electricity, which later led to the emergence of several energy supply companies in one area through the privatization of uncontrolled local networks, which were on the balance of enterprises in other industries (eg coal and metallurgy) , or through the alienation for debts of networks that were part of the regional energy supply company. In addition, methodological tools have been identified that determine the movement of the system of state regulation of the electricity sector. It is shown that in the conditions of the developed electricity market administrative-command management methods can be applied in fact only to state companies, in particular NEC "Ukrenergo" in terms of allocation of system operator and corporatization of the enterprise, which will transmit electricity through main and interstate networks. It is concluded that the current state of administrative and legal regulation of relations in the field of electricity is unstable, which is caused by the process of its reform. Positive aspects of the current situation include approaching market conditions, increasing proliferation of alternative and renewable energy sources and legislative encouragement of such activities, and the activities of authorized bodies have been improved, especially with regard to the administrative powers and tasks of the Regulator. At the same time, administrative and legal regulation should be aimed at meeting the needs of the population, especially the use of land for electricity, pricing, joint activities of authorized bodies. It should be emphasized that the existing shortcomings of administrative and legal regulation of relations in the field of electricity can be eliminated only comprehensively and consistently.

scholarly journals Predictive Voltage Control: Empowering Domestic Customers With a Key Role in the Active Management of LV Networks

2020 ◽  
Vol 10 (7) ◽  
pp. 2635
Author(s):  
Micael Simões ◽  
André G. Madureira
Keyword(s):  
Distribution System ◽  
Smart Grids ◽  
Low Voltage ◽  
Voltage Control ◽  
Distribution Networks ◽  
Active Management ◽  
Storage Devices ◽  
Home Energy Management ◽  
System Operator ◽  
Home Energy Management System

In order to avoid voltage problems derived from the connection of large amounts of renewable-based generation to the electrical distribution system, new advanced tools need to be developed that are able to exploit the presence of Distributed Energy Resources (DER). This paper describes the approach proposed for a predictive voltage control algorithm to be used in Low Voltage (LV) distribution networks in order to make use of available flexibilities from domestic consumers via their Home Energy Management System (HEMS) and more traditional resources from the Distribution System Operator (DSO), such as transformers with On-Load Tap Changer (OLTC) and storage devices. The proposed algorithm—the Low Voltage Control (LVC)—is detailed in this paper. The algorithm was tested through simulation using a real Portuguese LV network and real consumption and generation data, in order to evaluate its performance in preparation for a field-trial validation in a Portuguese smart grids pilot.

scholarly journals Short-term dynamics of day-ahead and intraday electricity prices

2017 ◽  
Vol 11 (4) ◽  
pp. 557-573 ◽  
Author(s):  
Georg Wolff ◽  
Stefan Feuerriegel
Keyword(s):  
Electricity Markets ◽  
Electricity Market ◽  
Renewable Energy Sources ◽  
Policy Implications ◽  
The European Union ◽  
Electricity Prices ◽  
Short Term ◽  
Content Type ◽  
Major Interest ◽  
Intraday Market

Purpose Since the liberalization of electricity markets in the European Union, prices are subject to market dynamics. Hence, understanding the short-term drivers of electricity prices is of major interest to electricity companies and policymakers. Accordingly, this paper aims to study movements of prices in the combined German and Austrian electricity market. Design/methodology/approach This paper estimates an autoregressive model with exogenous variables (ARX) in a two-step procedure. In the first step, both time series, which inherently feature seasonality, are de-seasonalized, and in the second step, the influence of all model variables on the two dependent variables, i.e. the day-ahead and intraday European Power Energy Exchange prices, is measured. Findings The results reveal that the short-term market is largely driven by seasonality, consumer demand and short-term feed-ins from renewable energy sources. As a contribution to the existing body of literature, this paper specifically compares the price movements in day-ahead and intraday markets. In intraday markets, the influences of renewable energies are much stronger than in day-ahead markets, i.e. by 24.12 per cent for wind and 116.82 per cent for solar infeeds. Originality/value Knowledge on the price setting mechanism in the intraday market is particularly scarce. This paper contributes to existing research on this topic by deriving drivers in the intraday market and then contrasting them to the day-ahead market. A more thorough understanding is especially crucial for all stakeholders, who can use this knowledge to optimize their bidding strategies. Furthermore, the findings suggest policy implications for a more stable and efficient electricity market.

Flexibilization of Biogas Plants through Intelligent Automation Generates Earning Opportunities

2016 ◽  
Vol 19 ◽  
pp. 74-80
Author(s):  
Ralf Böhm ◽  
Ralph M. Schaidhauf ◽  
Robert Spanheimer ◽  
Diana Maria Erdmann ◽  
Jörg Franke
Keyword(s):  
Electricity Market ◽  
Distribution System ◽  
Power Plants ◽  
Electrical Network ◽  
High Demand ◽  
Renewable Power ◽  
Wind Power Plants ◽  
Renewable Power Generation ◽  
System Operator ◽  
Biogas Plants

Due to guaranteed feed-in tariffs under the Renewable Energy Act and the feed-in precedence of renewable power generation plants the operation of biogas plants in Germany is currently plannable and economically advantageous. However, it is foreseeable that without this subvention biogas plants cannot compete with other regenerative plants such as photovoltaic and wind power plants on the open electricity market. Accordingly, it is of great importance for biogas plant operators to identify and occupy suitable niches to make full use of the unique features of their plants. Because of their predictable availability, those plants can particularly benefit of earning opportunities in times of high demand and contribute to grid stabilization. In order to keep the effort for plant operators as low as possible the automation of existing biogas plants can be extended and enabled to communicate with market platforms or control centers of the distribution system operator. Thus biogas plants can contribute to balancing group compensation not only for accounting purposes but factual by appropriate feed-in into the electrical network in consideration of actual demand.

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