BRUSSELS: High currents in power systems under normal, emergency and fault conditions

Summary

Aim :

• To assess and discuss the present situation,
• future needs and developments in the field of high continuous and temporary service currents,
• high short-circuit and earth fault currents in HV, EHV, UHV grids and power station primary circuits.

Contact us to select your documents from the list of papers

1. SHORT AND LONG TERM EXPECTATIONS REGARDING THE DEVELOPMENT

OF CURRENT LEVELS IN HV, EHV AND UHV GRIDS

• 100-00 - Special Report
• 100-01 - Existing and future service and short-circuit currents on the Ontario Hydro bulk transmission system
• 100-02 - Asymmetrical currents arising from short-circuits and earth faults on the CEGB 400 kV system
• 100-03 - Evolution à moyen et long terme des courants de défaut sur le réseau THT du Portugal
• 100-04 - Results of probabiIistic short-circuit studies for HV networks
• 100-05 - Short-circuit currents in the interconnecting network of Western Europe
• 100-06 - Considerations of the short-circuit current in power transmission systems in Japan
• 100-07 - Short-circuit currents in high and extra high voltage grids. Review, current situation and outlook
• 100-08 - A statistical technique for projecting future short-circuit levels of EHV systems
• 100-09 - Fault current distribution parameters for calculating reliabiIity of grounding grids and circuit-breakers in electric power systems
• 100-10 - Rates and currents levels for various types of short-circuits in electrical power systems

2. HIGH SERVICE CURRENTS IN GRIDS, SUBSTATIONS AND POWER STATIONS

2. 1. CRITERIA FOR TEMPORARY AND CONTINUOUS PERMISSIBLE LOADING UNDER VARIOUS CONDITIONS (PREVIOUS LOADING, WEATHER, THERMAL TIME CONSTANTS ETC.), THE PROBABILISTIC AND DETERMINISTIC APPROACH

• 210-00 - Special Report
• 210-01 - Uprating of service currents in substations
• 210-02 - Examination of the continuous and short-term thermal capacity of overhead Iines
• 210-03 - Statistical applications of environmental data to overhead Iines ampacity in Brazil
• 210-04 - Les courants permanents de forte intensité dans les postes bIindés
• 210-05 - Higher service current in overhead Iines
• 210-06 - GIS design for high ratings of short-circuit and continuous current

2.2. DEVELOPMENTS IN EQUIPMENT AND MATERIALS (CONDUCTIVITY, PERMISSIBLE TEMPERATURE, INFLUENCE ON LIFETIME, COMMUTATION OF HIGH SERVICE CURRENTS BY  DISCONNECTORS, ETC.)

• 220-00 - Special Report
• 220-01 - GACSR: new type conductor for increasing current capacity of existing overhead Iines
• 220-02 - New design profiles for UHV conductors
• 220-03 -Problems associated with high service current in GIS

2.3. HIGH CURRENT DESIGNS IN PO\!IER STATIONS, SUBSTATIONS, OVERHEAD LINES AND CABLES:

       - WITH REGARD TO UPRATING OF EXISTING INSTALLATIONS

       - NEW DESIGNS AND METHODS

• 230-00 - Special Report
• 230-01 - A deterministic approach for realtime overhead line conductor ampacity solution
• 230-02 - Uprating of existing substations by the use of thermo-resistant aluminium alloy conductors
• 230-03 - High current technique for installations in power plants - isolated phase metal enclosed generator busbars - high current isolated phase busbars
• 230-04 - Supertension cables for transmission of large power. Part A : present state-of-the-art
• 230-05 - Supertension cab les for transmission of large power. Part B : consideration on the near future
• 230-06 - Temperature transients in CGI cables laid in air
• 230-07 - The use of a cab le system mode! to control current loadings
• 230-08 - Some factors which influence the continuous and dynamic thermal ratings of overhead Iine conductors

3 SHORT-CIRCUIT AND EARTH FAULT CURRENTS IN GRIDS, SUBSTATIONS AND POWER STATIONS

3.1. SHORT-CIRCUIT CURRENT WITHSTAND CAPABILITY DESIGN CRITERIA ( IN COMBINATION WITH OTHER - NORMAL AND EXCEPTIONAL - LOADINGS); THE PROBABILISTIC AND THE DETERMINISTIC APPROACH

• 310-00 - Special Report
• 310-01 - Mechanical de design criteria of outdoor substations 
• 310-02 - Stochastic determination and evaluation concerning loads of short-circuit current in electric energy transmission installations
• 310-03 - ProbabiIistic uprating of 230 kV strain bus system at subsations with high fault currents

3.2. DEVELOPMENTS IN SHORT-CIRCUIT CURRENT WITHSTAND, INTERRUPTION AND/OR LIMITING CAPABILITY OF EQUIPMENT FOR SUBSTATIONS, POWER STATIONS, LINES AND CABLES

• 320-00 - Special Report
• 320-01 - Circuit-breakers with high breaking capacities
• 320-02 - Development of UHV gas circuitbreaker and disconnecting switch, and their performance tests
• 320-03 - Transformateurs de courant pour protection en régime transitoire
• 320-04 - Application of circuit-breakers rates
• 320-05 - Comportement d'un sectionneur à coupure centrale traversée par un courant de court-circuit : influence
• des paramètres principaux
• 320-06 - Politique de la mise à la terre des points neutres du réseau 400 kV français
• 320-07 - Procedures for estimating probability of circuitbreaker failure under fault current interruption
• 320-08 - Electrical equipment stresses at faults under non-standard conditions
• 320-09 - La Iimitation des courants de court-circuit monophasé

3.3. HIGH SHORT-CIRCUIT CURRENT SUBSTATIONS, LINES AND CABLES : 

       - UPRATING OF EXISTING INSTALLATIONS

       - NEW DESIGNS AND DESIGN METHODS

• 330-00 - Special Report
• 330-01 - Mechanical effects of short-circuit currents in substations with strain bus systems - medium complexity calculation methods
• 330-02 - Uprating of existing substations for higher short-circuit and service currents
• 330-03 - Shortcircuit tests and measurements of mechanical stresses on full-scale sections of 420 kV outdoor substations
• 330-04 - Measurement on physical models of short-circuit currents ettects
• 330-05 - Mechanical effects of short-circuit currents in substations with strain bus systems comparison 
• calculation results
• 330-06 - Mechanical effects of shortcircuit currents in substations with strain bus systems - a general description
• 330-07 - Mechanical effects of short-circuit currents in substations with a strain bus system. Parameter analysis and simple method of calculation
• 330-08 - Behaviour of bundled conductors in substations under high short-circuit currents
• 330-09 - Dynamic short-circuit stress of 380 kV busbar arrangements with flexible and stiff conductors

3.4. EFFECTS AND CONTROL OF EXTERNAL AND INTERNAL HIGH POWER ARCS

• 340-00 - Special Report
• 340-01 - Full-scale high current model tests on busbar construction for GIS
• 340-02 - High current power arc performance of insulator assemblies for AC UHV transmission lines
• 340-03 - Some experimental results of internai arcing tests in gas insulated switchgear 
• 340-04 - Effects of power arc faults in gas-insulated substations
• 340-05 - Power arc behaviour of insulator strings and fittings for UHV overhead Iines

4. EARTHING

4.1. REQUIREMENTS FOR AND DESIGN OF EARTHING SYSTEMS FOR SUBSTATIONS WITH REGARD TO CURRENT CARRYING CAPACITY, POTENTIAL RISE, INFLUENCE ON COMMUNICATION AND CONTROL SYSTEMS

• 410-00 - Special Report
• 410-01 - Design of switchgear earthing systems with regard to current loading capacity and touch voltages
• 410-02 - The design of earthing systems for high voltage substations in relation to I ightning and switching impulses
• 410-03 - Potential rise calculation for an economical design of earthing systems for high voltage substations
• 410-04 - Expériences de mesure dans le domaine des installations de mise à Ia terre
• 410-05 - Perturbations de fréquence industriel le produites dans les circuits de postes lors de défauts en haute
• tension
• 410-06 - Post design analysis and scale mode! tests for a two grid earthing system serving the 345 kV GIS faciIities at Seabrook power plant
• 410-07 - Current and potential distribution in grounding systems of distribution substation of voltage higher than 100 V.
• 410-08 - Personal earthing equipment and use factors from concepts to maturity,"growing up procedures"
• 410-09 - Influence between earthing systems without metallic connection
• 410-10 - Special features of earth-fault currents

4.2. REQUIREMENTS FOR AND DESIGN OF EARTHING SYSTEMS FOR OVERHEAD LINES (TOWER EARTHING AND EARTH WIRES) WITH REGARD TO CURRENT CARRYING CAPACITY, POTENTIAL RISE, INFLUENCE ON COMMUNICATION AND CONTROL SYSTEM

• 420-00 - Special Report
• 420-01 - Measurement of soiI resistivity and support footing resistance on overhead transmission lines
• 420-03 - Analysis of transmission Iine grounding systems under fault conditions
• 420-04 - The effect of partial compensation of the unfavourable influence of increased soiI resistivity in long earthing conductors
• 420-05 - Nouvelle méthode de calcul des inductances propres et mutuelles des Iignes en présence du sol
• 420-06 -  Analysis of ground wire behaviour transmission lines
• 420-07 - La stabilité thermique des prises de terre lors des défauts de courte durée

4.3. EARTHING SWITCHES (FAULT CURRENT, INDUCED CURRENT, CAPACITIVE CURRENT) AND PORTABLE  EARTHING DEVICES; REQUIREMENTS AND SOLUTIONS.

• 430-00 - Special Report
• 430-01 - Earthing of high voltage parts in outdoor substations by short-circuit proof devices
• 430-02 - Earthing switches : switching of induced currents and voltages system requirements, test data and test results
• 430-03 - Transformer neutral earthing switch
• 430-04 - Dispositifs de mise à la terre amovibles pour postes à haute tension, exemples d'applications, d'incidents et d'essais en laboratoire
• 430-05 - Stresses in grounding switches at parallel circuit of 500 kV.
• 430-06 - Switching of earthing switches at the Iine terminais of multipie circuits configurations

5. REPORTS FOR THE ROUND-TABLE DISCUSSIONS

• 500-01 - Dynamic stress in high voltage structures by short-circuits of short duration
• 500-02 - Calculation of short-circuit currents and their mechanical and thermal effects - State of international standardization
• 500-03 - Short-circuit current tests on multiple conductor strain buses used in 400 kV substations

Additional informations