Monitoring systems for distribution networks

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The challenge: communication

 

Flexible architecture

The controllers and management systems are becoming significantly more complex due to the vast increase in data volume (big data). Hierarchies are becoming deeper, control algorithms are becoming more extensive and the data security requirements are increasing.

Today, data entry concentrates on the high and medium voltage levels. In the future, the data flow for control will grow significantly. Monitoring the low voltage level is added to this, which results in 35,000 data records (1/4 hourly values) per measurement point per year.

In order to limit the data volume, Janitza measuring devices allow an individual, customer-specific selection of measurement parameters and definition of the averaging times. The programming option for the network analysers via graphical editors or Jasic®source code enables critical parameters to be monitored at the measuring points and only relevant data to be sent to the master display.

This is possible with all available physical media:

  • Fibre optics 
  • Copper cables
  • Mobile telephony
  • PLC

A wide range of transfer protocols and protocol converters guarantee a simple system connection.

Security

The directive for data security is the German Association of Energy and Water Industries (Bundesverband der Energie- und Wasserwirtschaft – BDEW) white paper "Requirements for Secure Control and Telecommunication Systems". Networks are critical infrastructures. Therefore, the highest safety standards are required. 'End-to-end' encryption technologies are favoured.

Burden of proof

By the end of 2014, all European energy suppliers must publish data such as capacity and current production of their power plants promptly and submit this data to the EU regulation authority ACER. The German Electricity Grid Access Ordinance (Stromnetzzugangsverordnung) already requires network operators to enable measurement, balancing and billing that is based on values that are compiled every quarter of an hour. They must submit these to the German federal grid agency (Bundesnetzagentur) automatically. Class A power quality analysers from Janitza enable the proof of delivery to be generated lawfully and therefore to prevent unjustifi ed claims and to organise reporting for grid agencies easily.

Our solution

Mobile telephony modem and Easy Gateway EG400 gateway

Data connection and simple commissioning: Communication gateway for wireless and hard-wired communication

More Informations

Communication architecture for the monitoring system

Because of the flexible interfaces the measurement devices can be conveniently connected to existing interfaces. The open system architecture makes it possible to transfer easily measurement data and information to the control room (SCADA).

Our solution

GPS radio receiver

Time synchronisation between UMG power quality analysers, Works worldwide, Receive and process the GPS time signal (GMT), Controls up to four of the UMG 512 model

Weitere Informations

GridVis® – network visualisation software

With GridVis®, Janitza offers powerful, user-friendly software for the development of energy and power quality monitoring systems. The basic version GridVis®-Basic, which is part of the scope of supply of the measurement devices, serves both for programming and confi guring the UMG measuring devices and also for reading out, saving, displaying, processing and analysing the measurement data.

GridVis® is a comprehensive and scalable software solution for energy suppliers, industrial applications, facility management, building market and infrastructure projects. GridVis® provides technicians and managers with the required data to identify potential energy savings, reduce energy costs, avoid production shut-downs and optimise the utilisation of production resources.

  • Intuitive operation
  • Configuration of the measurement system and the UMG measurement devices
  • Ready-made PQ report templates, e.g. in accordance with EN 50160 or EN 61000-2-4
  • Automatic or manual readout of measurement data
  • Graphical illustration of online and historical measurement data
  • Comprehensive alarm management
  • User management
  • Generic modbus devices, virtual meters
  • Graphic user interface (topological view) for visualising real-time data and messages
  • Statistical evaluation of the measured data
  • Comprehensive export functions (e.g. Excel)
  • Reports for energy usage and power quality (EN 50160, IEEE 519, EN 61000-2-4), manual or time-controlled with individual schedule
  • Saving data in a central database including database management (e.g. MySQL / MS SQL / Derby / Janitza database)
  • Open system architecture and scalability

Extended EN 50160 power quality annual report

Energy suppliers have to monitor countless measurement points for 52 weeks of the year. In practice, you cannot evaluate this large number of individual reports. For this reason, the GridVis® software provides reports for energy supply companies, distribution network operators and regulatory authorities. This annual overview is based on the standard EN 50160 and ensures a quick overview of the supply areas in which the limit values of EN 50160 were exceeded for defi ned periods of the year.

Power quality

  • Pre-defined PQ reports provide immediate statements about the power quality and compliance with the applicable standards: EN 50160, EN 61000-2-4, NeQual, IEEE 519, ITIC (CBEMA)
  • Reports can be generated in a time-driven manner
  • Freely confi gurable time plans

Load profile, utilisation of the operating equipment

  • Integrated report generator to evaluate the measurement data
  • Load profile analyses for an overview of peak consumption throughout a stipulated period of time
  • Freely selectable report output (HTML, XML, Excel, Word or PDF)
  • Convenient, time-driven, automatic Excel export for further processing of the data or incorporation into other systems.
Fig.: Heatmap, i.e. colour (traffi c light principle) illustration of how good or bad the power quality was at a particular measurement point in a calendar week. This principle guarantees a quick overview of the complete supply area.
Fig.: Heatmap, i.e. colour (traffi c light principle) illustration of how good or bad the power quality was at a particular measurement point in a calendar week. This principle guarantees a quick overview of the complete supply area.
Fig.: Extract from the EN 50160 annual report
Fig.: Extract from the EN 50160 annual report
Item no. 51.00.264

EN 50160 Watchdog

Integrated "Watchdog" function for continuous monitoring of the power quality per EN 50160

The power quality on the supply side should comply with EN 50160. This standard describes various power quality parameters for the distribution of electrical power on public power grids. EN 50160 pertains to mains voltage, i.e. the voltage measured at the mains connection point. With power quality monitoring per EN 50160, all the algorithms (including for 95% and 100% values) are integrated in the measurement device itself.

The auxiliary voltage of the device should be buffered to ensure that power failures can be reliably detected as events.

  • Integrated watchdog function
  • No need to transmit large volumes of measured data from the measurement device to a host system
  • Save on communications costs for applications with remote consumers
  • Simple analysis possible thanks to integrated colour display based on a "traffic light" system
  • Possible to perform power quality analyses even with no particular knowledge on the topic
  • No alarm functionality
APP EN 50160 Watchdog Power quality monitoring per EN 50160 with traffi c-light style indication and specifi c key variables for the power quality
APP EN 50160 Watchdog Power quality monitoring per EN 50160 with traffi c-light style indication and specifi c key variables for the power quality
Device compatibility

UMG 605 / UMG 511 / UMG 512

Software based expansions for the measurement devices

There are numerous apps, which run on both classical PCs and mobile end devices, to choose from for Janitza devices. These allow the operator to read out, edit and display data, receive alarms or simplify the configuration. Communication is implemented directly with a device or via the GridVis® software, depending on the application. In doing so, the apps can also work as sub-programs that simplify certain working steps.

You get an overview of all Janitza APPs here

Advantages

  • APPs can be called up via the measurement device homepage
  • Web-based data display and configuration
  • No software installation required
  • Data can also be displayed directly in the browser on mobile devices such as the iPad
  • Intuitive use without a great deal of training
  • Extremely cost-effective and convenient solution
  • User-defined settings enable a low data volume