Pilot testing methodologies, models, scenarios and validation approach

This report describes the pilot tests that will be carried out within GARPUR. The pilot tests aim at assessing and validating, as closely as possible to real-life conditions, the new Reliability Management Approach and Criteria (RMACs) developed in work package 2 and the socio-economic impact assessment framework developed in work package 3, while considering the methodologies and approaches for practical implementation in work packages 4, 5 and 6. The proposed RMACs are compared against the current N-1 practices and approaches determined in work package 1. In addition, some pilot tests will make use of the GARPUR Quantification Platform (GQP) that has been developed by work package 7. A total of eight pilot tests are proposed by five different transmission system operators (TSOs) and given different priority levels for implementation. Three pilot tests make use of the GQP. The five other pilot tests will be implemented at TSOs’ premises in near real-life context. The pilot tests cover real-time operations, short-term operation planning and long-term system development. Different indicators are proposed to assess the proposed reliability management approach and criteria and compare them with current practices. The diversity of the pilot tests in terms of time horizons and the number of involved TSOs demonstrate the general nature of the reliability management approach and criteria proposed within GARPUR

A Voltage Instability Predictor Using Local Area Measurements

There has been a pressure to operate power systems closer to their security limits. This has partially been due to financial imperatives following the deregulating of markets. Other practical difficulties have been obtaining authorization from regulatory bodies to build power plants and transmission lines. In this situation it is essential to monitor the system and to have tools that can predict the distance to the point of collapse (PoC). Much effort has been put into research of the phenomenon voltage collapse, and many approaches have been explored. Both dynamic and steady-state behavior have been studied thoroughly, though very few protection and control schemes have been implemented. In this dissertation the possibility of an index based on local area measurements have been explored. Voltage stability can be classified as either a transient or a long-term stability problem, and the index proposed in this dissertation is based on long-term dynamics

The Impact of Active Power Losses on the Wind Energy Exploitation of the North Sea

Transmission active power losses can influence the distribution of power flows in the transmission grid which consequently alter the generation dispatch and scheduling through the power system. This can especially affect the exploitation of large scale renewable energy sources (RES) since they are normally installed far away from load centres. RES technologies are expected to cover a large portion of the future energy mix in the continental European power system and grid bottlenecks are a critical factor for successful integration of RES technologies in Europe. In this respect, transmission losses can significantly affect the potential grid bottlenecks and the exploitation of the expected energy produced by RES. In this paper a comparison analysis is carried out on approaches to include active power losses in a DC optimal power flow. The initial idea is to apply a method to the existing flow-based market model Power System Simulation Tool (PSST), a tool for studying the effect of high penetration of wind power and consequent grid expansion in the European power system. Implementation of losses in large scale power systems significantly increases the computational burden. A solution to reduce computational time is to calculate reasonably good approximations of the active power losses. This paper proposes an approach to include transmission active power losses that can be implemented in large scale power system in reasonable computational time.publishedVersio

A carbon neutral power system in the Nordic region in 2050 D3.1 in the NORSTRAT project

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A carbon neutral power system in the Nordic region in 2050 D3.1 in the NORSTRAT project

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