Objective
Objectives
The main objectives of this project are in a first step the experimental investigation of wire-bound and field-bound interference of HV insulators and in a second step the analysis of the relationship between both by means of theoretical considerations and modelling.
State of progress
Partial discharge levels are generated up to some 10 nC and RI field levels are measured reaching Emax = 120 dB(µV/m) with frequency components up to 1 GHz. Hereby, the accomplished examinations prove the practicability of the test setup, developed for measuring radiation of external partial discharges at high voltage insulators as well as the reproducibility of radiation properties in different measuring surroundings. Simultaneously, measurements in free-air stations show equal characteristics and emphasize the practical emc relevance of HV insulators. The simulation tool is used for a parameter study of the setups geometry. Length and height of single line sections and the position of the receiving antenna are varied and changes in field radiation are investigated. From simulation results it can be concluded, that the importance of the length of the vertical conductor between insulator and the horizontal conductor is neglectible with regard to its effect on field radiation, as long as a minimal length is maintained. With a fixed position of the receiving antenna in front of the insulator, no significant changes of the spectrum are recognizable. With increasing distance, field spectra in a distance of l = 1..10 m drop out continuously. Resonance peaks shift besides lower frequencies with conservation of the pattern of the spectrum. Results show that an accurate geometry has a subordinary effect on field radiation; more important is the type of discharge phenomena. Phase-angle-resolved pd measurements with simultaneously field spectra measurements of different types of discharge phenomena confirm the correlation between type of discharge phenomena and field spectra. By recognition of the discharge phenomena the corresponding field spectra can be a predict. Field radiation of trichel pulses is neglectible and field radiation of single streamer discharges can be assessed. Micro discharges shows a constant amplitude of field spectra with frequency components above 1 GHz. Amplitudes of field spectra are correlated with the amplitude of the apparent charge of single discharges. For that reasons, it seems to be possible to predict the field radiation without field measurement only by recognition of the discharge phenomena. Hereby, the influence of the test surrounding, which is most important by measurements of field spectra, is neglectible. Regarding time- and cost-optimization the test procedure for the assessment of field bound interference caused by HV insulators is reduced to standardized partial discharge measurement according to IEC 270, originally intended for qualifying stress analysis and now obtaining a new meaning.
////
//PROG_ACR
SMT
//PJ_PJ_RPG
Background
Due to the current state of standards, there exists no test procedure to detect the radiated interference field of HV insulators. However, the protection requirements given in the European EMC directive EMC 89/336/EEC, especially concerning the increasing density of wireless telecommunications, necessitate procedures to detect radio interference field intensities of HV components.
Workprogramme
The work programme can be subdivided into four work packages (WP) containing several sub-tasks. Experimental studies in the laboratory are performed in the first WP. This means basically that field- and conductor-bound measurements are performed for different insulators at varying HV levels. In the second WP, a model for interference propagation is developed based on a theoretical analysis and the assessment of the measurement results obtained in WP1. The data obtained in WP1 and WP2 is compared with measurements of insulators under practical operating conditions in WP3. In the last working step, a proposal for standardising RI field testing at insulators shall be set.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- natural sciences mathematics pure mathematics geometry
- engineering and technology electrical engineering, electronic engineering, information engineering information engineering telecommunications
- natural sciences computer and information sciences software software applications simulation software
You need to log in or register to use this function
Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Data not available
Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
44221 Dortmund
Germany
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.