Francisc Zavoda

Current practice and future challenges for power quality monitoring - CIGRE WG C4.112 perspective

This paper describes the initial activities of the recently created CIGRE WG C4.112 “Guidelines for Power quality monitoring - measurement locations, processing and presentation of data”. The WG was created in January 2011 in recognition of demand for coherent set of guidelines for power quality monitoring in existing and future power networks to meet increasing customers and the regulatory agencies demands to provide information on the actual power quality level in power networks. Though still at early stages of the work the members of the WG compiled an extensive material about the state of the art of power quality monitoring. This paper summarizes current understanding of power quality monitoring issues and points out directions in which the WG will continue to work over next couple of years in order to provide answers to outstanding questions.

CIGRE/CIRED/UIE JWG C4.110 - voltage dip immunity of equipment in installations - status April 2008

This paper presents the status of the work, by April 2008, in C4.110, a joint working group by CIGRE, CIRED and UIE. The scope of the working group is to gather technical knowledge on the immunity of equipment, installations and processes against voltage dips, and to use this knowledge in the further development of methods and standards. The activities of the working group are divided in seven ldquochaptersrdquo. Chapters 1 and 7 are introduction and conclusions, respectively. Chapter 2 gives a general description of voltage dips as they appear at the terminals of sensitive equipment. Chapter 3 describes the performance of equipment and processes during voltage dips. This chapter also includes recommendations on the design of processes. In Chapter 4 the results from Chapter 2 and Chapter 3 are combined to set requirements for the dip characteristics that should be included in immunity testing. Chapter 5 is the data gathering chapter, covering data on voltage-dip statistics at different locations, but also data on the economics of equipment immunity and testing. Finally, in Chapter 6, recommendations for immunity objectives will be given. Important contributions of the working group are: a check-list of voltage dip characteristics to be used early in the design of equipment; a methodology to assess the performance of a complete installation and to include voltage-dip performance in the design of the installation; recommendations for characterization testing of equipment against voltage dips; recommendations for voltage-dip immunity of equipment.

Power quality in the future grid — Results from CIGRE/CIRED JWG C4.24

This paper gives a status report on activities of CIGRE/CIRED JWG C4.24. The following issues are addressed in the paper: Introduction, scope of the report and terminology; New developments in power electronics (PE); Changes in probability of interference; Microgrids and PQ; Volt-VAR control and PQ; Feeder reconfiguration and PQ; Demand side management and PQ; New measurement techniques; New mitigation.

Current and future practice for selection of Power Quality Monitoring locations — Position paper of CIGRE/CIRED JWG C4.112

This paper describes current and future practices for selection of Power Quality Monitoring (PQM) locations in future networks as they were addressed by the CIGRE/CIRED JWG C4.112 “Guidelines for Power quality monitoring - measurement locations, processing and presentation of data”. It deals with questions related to where to measure as a function of what (i.e. parameters), how (i.e. sensors and intelligent electronic devices (IEDs) portables or permanently installed) and how long (i.e. temporary or continuously). This selection ranges from compliance verification, benchmarking, site characterization and troubleshooting to advanced applications and studies and active Power Quality (PQ) management.