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protection relay testing procedure

Technical papers
Testing of elastomeric isolators for nuclear power plants
Nowadays, the design of nuclear power plants (NPP) is characterized by enhanced safety level. In particular, GEN III+ and GEN IV reactors have to be highly secure and designed to withstand extremely severe external events such as floods, tsunamis, tornadoes, plane crashes, fires and, in particular, earthquakes. Seismic isolation is considered the most promising technology […]
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System Adequacy and Market Modelling
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System Adequacy and Market Modelling
The Electric power System has a very important role for the economic development and welfare and is at the heart of a sustainable way to use energy. It is the largest machine ever been engineered: in Italy 60 thousand kilometers of transmission power lines – one and half time the circumference of the Earth – […]
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Privacy Policy
1 Introduction Cesi S.p.A. (hereinafter referred to as “Cesi“), deems the protection of the personal data of its potential customers and/or users to be of fundamental importance, ensuring that the processing of personal data, carried out by any means, is done in full compliance with the safeguards and rights recognised by Regulation (EU) 2016/679 of […]
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CESI OBTAINED THE AEO AUTHORIZATION
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CESI OBTAINED THE AEO AUTHORIZATION
​Milan, 13/03/2018 – Cesi obtained the AEO Authorization (Authorized Economic Operator), released by the Italian Customs Authority. The Authorization is conferred only to companies able to demonstrate reliability and safety in their import/export activities. This authorization guarantees a greater control on shipping and can be obtained only after several meticulous audits on: the company’s economic and […]
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Services IEC/IEEE Testing Services and recent updates
IEC 62271-103 – Testing Services – Alternating current switches for rated voltages up to and including 52 kV
IEC 62271-103 revised in 2021 – The standard for alternating current switches IEC 62271-103 has been updated to align with other related product standards (for example IEC 62271-102 for earthing switches/disconnectors) for the kinematic chain and test on the position indicating device, making tests more uniform and have more clear acceptance criteria for the test […]
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Technical papers
Impact of CO2 Reduction Targets on Transmission Capacity Expansion dictated by the Power Market Clearing: Application to the Italian and French Systems
The awareness of the close relationships between global warming and GHG (Greenhouse Gas) emission has risen enormously during the latest years. To set a bound on CO2 emissions, in the EU a CO2 cap is assigned to each Member State (EUA: European Union Allowance) and a market for trading emission allowances (ETS) is presently in […]
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Technical papers
Ferroresonance in Inductive Voltage Transformers Or Power Voltage Transformers: analysis, laboratory tests and solutions
A ferroresonance analysis related to HV Inductive Voltage Transformers (IVT) and power Voltage Transformers or Station Service Transformers (PVT/SST) was addressed to develop models based on EMT formulation, enabling detailed ferroresonance risk analyses in specific HV station conditions and helping in the equipment technical specifications (including anti-ferroresonance remedial provisions). The research relied on a comparison […]
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Technology to build and operate Supergrid is available today
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Technology to build and operate Supergrid is available today
​As announced at the inaugural conference Supergrid 2012 on 21 March, FOSG has released a roadmap on the technological challenges for Supergrid. There are no technology show-stoppers to the development of a European Supergrid. For visionary long term planning the availability of key VSC-Grid technologies, such as control and protection methods, main circuit design, grid […]
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Technical papers
Maximum feasible penetration of non-programmable RES generation in power systems
​The large-scale development of renewable sources, with particular reference to wind, in the generation mix might introduce several problems for a secure management of the power system, due to a higher generation uncertainty, thus requiring careful investigations by the responsible for planning and the involved system operators. In this context, CESI has developed a thorough […]
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Testing Labs
Services IEC/IEEE Testing Services and recent updates
International Standards provide instructions, guidelines, rules, or definitions that are then used to design, manufacture, install, test & certify, maintain, and repair devices and systems. They are essential for quality and risk management; they help researchers to understand the value of innovation and allow manufacturers to produce products of consistent quality and performance. International standards […]
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Doing Business in a sustainable way
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Doing Business in a sustainable way
​Euro-zone is facing an economic crisis that can undermine the commitment to tackle environmental issues. This is one of the key messages by the European Environmental Agency, reported in a recent publication entitled “Building the future we want”. The 2012 edition explores the environmental impacts of our consumption and production patterns and how these can […]
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Bahrain selects CESI
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Bahrain selects CESI
​Manama, Bahrain 24th July 2017 – CESI has been appointed to support the Bahrain’s Sustainable Energy Unit (SEU) in developing the technical and strategic regulatory requirements related to connecting distributed renewable energy resources into Bahrain’s national Electricity Grid owned by Electricity and Water Authority Bahrain (EWA). Bahrain’s Sustainable Energy Unit’s key objectives are to create […]
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High RES penetration impact on Operations
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High RES penetration impact on Operations
​The development of Renewable Energy Sources (RES) is rapidly growing worldwide and they will play an increasingly important role in electricity power systems in the coming years. The majority of this is expected to be from Variable Non-Synchronous Renewable (VNSR) generation sources. According to the 2020 targets, significant volumes of VNSR generation are estimated across […]
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Volatile RES & Thermal Plants flexibility
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Volatile RES & Thermal Plants flexibility
IntroductionWith the aim of reducing CO2 emissions and dependency from fossil fuels, in various countries the sharp increase of electrical RES (Renewable Energy Sources) as a result of policies of substantial subsidies is creating problems to an efficient and reliable operation of the electrical power system. Both transmission and distribution systems have to face an […]
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