Fault Analysis and Evaluation Module for Power System Monitoring

Introduction

High-voltage transmission and distribution networks are the backbone of modern power generation and distribution systems. Faults on the transmission system can lead to severe economic losses. Rapid information about the type and the location of the fault can assist the task of repair and maintenance, thereby minimizing the economic effects of power interruption. The E_wineve fault analysis and evaluation module belongs to the software suite "Power System Monitoring”, abbreviated PSM. After a line fault, it supports quickly the operator in the control centre with the localisation of the fault. This is the most relevant informa-

User benefits

The E_wineve fault analysis and evaluation module reduces down time of the transmission or distribution lines and supports the quick restoration of power. E_wineve assists the operator by generating automatically a “short fault report” in case of a line fault. It can be configured to print these reports dependent on different configurable conditions. Only relevant reports are generated and irrelevant reports are suppressed. This supplies the operator with the right information at the right time during demanding situation after a line trips.

E_wineve 1MRB520153-Ben Page 1 Issued: August 2003 Changed since March 2003 Data subject to change without notice

tion directly after a line trip. Proper actions can immediately be arranged to shorten the outage time and restore electricity and full network availability. In addition, protection engineers are using E_wineve to analyze all generated disturbance records, making good use of the highly flexible evaluation and calculation features. This leads to a better understanding of complex effects in the network, weak spots in the network are detected and settings are accurately adjusted or protection schemas are improved, which in the long-term results in a decreasing number of faults. Therefore higher reliability of the network is achieved. The short report, generated by E_wineve contains precise fault location and information about the fault type. This reduces economic impact of outages since the repair team can reach the faulted section of line faster. This reduces the time to put the line back into service. Seen in the long-term, E_wineve increases the reliability of the power network and minimises the damage resulting from faults in transmission and distribution systems and in power generation systems. This can be achieved using the strong and user-friendly analyzing functions of E_wineve. Calculations can easily be programmed using the point and click icons. Related disturbance

ABB Switzerland Ltd Utility Automation Systems

Fault Analysis and Evaluation Module for Power System Monitoring

E_wineve 1MRB520153-Ben Page 2

User benefits (cont’d)

records can be merged and many other functions can be applied to analyze disturbance records. Using this information the protection engineer will uncover secondary effects in the

power system and might optimize the settings of his assets, which results in a more robust power network.

Application

The E_wineve fault analysis and evaluation system can be used to evaluate disturbances recorded in the following devices:

• COMTRADE IEEE C 37.111 - 1991

• Dedicated disturbance recorders - ABB INDACTIC 650 • Integrated disturbance recorders - ABB protection devices • 3rd party dedicated disturbance recorders • 3rd party integrated disturbance recorders - protection devices. E_wineve can handle various standard and proprietary file formats of the disturbance recording, for example:

• ABB proprietary formats - INDACTIC format - EVE format - REVAL format. The E_wineve system can run on Microsoft Windows 2000 or Windows NT computer for evaluation and analysis of faults in the following areas: • Distribution, transmission and sub-transmission levels • Power supply of industrial plants and the auxiliary supply of power plants • Power generation systems, generator, transformer and transmission protection systems.

Functions

E_wineve has a number of functions and features tailored to the needs and requirements of the user: • Visualization/display • Merging of two disturbance record files • Automatic fault location with automatic printout of the "short fault report" • Manual fault location • Display and printout of the signal vectors • Application-specific mathematical calculation of the waveforms • Information regarding pre-fault, fault and post-fault conditions • Time calculation based on the values of the digital signals • Selective printing of fault reports • Data base and statistical analysis of the fault location, fault types. Visualization/display

• In the file open menu selection of the disturbance files to be displayed as per specific period of day, month or year • On-screen analysis support by means of: - simultaneous display of several disturbance record files

- cursor lines that can be positioned to a numeric time value - zooming in/zooming out the interesting part of a display by expanding the amplitude and/or time axis - display of individual signals or grouping of several signals on one time axis, e.g. all voltages on the same horizontal axis • Selection of the colors for each of the analog and digital signals from the standard MS office color palette • User-customized view settings, for example amplitude size, axis height, signal colors, time axis zoom, can be stored into 10 so-called user profile layouts • Opening the disturbance record file in the - ABB Indactic EVE format - COMTRADE file format IEEE C37.1111991 - REVAL format • Saving the disturbance record file in - the Indactic EVE format - the COMTRADE file format IEEE C37.111-1991 • Printout of the disturbance record file on commercially available color printers or plotters

ABB Switzerland Ltd Utility Automation Systems

Fault Analysis and Evaluation Module for Power System Monitoring

• Each individual oscillograph can be copied to another MS Windows program or office application via the clipboard, thus making

Fig. 1

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the documentation of fault records an easy task (copy and insert bit maps).

Visualization / display of a fault record

Merging of two disturbance record files

The merge function allows the combination of data for the same fault, which has been recorded by different acquisition units. This results in a new data set with selected measurements from an extended area that can be used for further analysis by additional functions, such as power analysis calculation and fault location. • Merging of different recorded fault data for in-depth analysis • Automatic synchronization of both data sets, i.e. the time axes of both data sets are made to correspond exactly within