Operating wind power stations with high availability

Generator

Feeding medium voltage safely into the system

Generator

When it comes to high availability and reliability of wind energy systems, the plant operator has just one objective - to avoid any unexpected downtime or problems with everyday operation. For an unearthed asynchronous generator with squirrel cage rotor, a blind performance compensation device is installed in parallel to the generator. For modern systems, the generator speed is disconnected from the network frequency by means of an alternating current inverter. Electrical safety plays a decisive role. An undetected isolation fault is just as significant as unexpected system downtime or can increase the fire risk. At the same time, unplanned service interventions can be expensive and time-consuming.

Product overview ISOMETER®
Market segment brochure Renewable Energy
Technical paper Insulation fault location - Planning and set up in the solar charging station at the University of Applied Sciences Bingen
Technical paper Answers for tomorrow
DIN EN 61400-2
Wind turbines - Part 2: Requirements for small wind turbines

DIN EN 60255-127
Measuring relays and protection equipment - Part 127: Functional requirements for over/under voltage protection

DIN EN 50178
Electronic equipment for use in power installations

Control voltage

High availability requires a reliable supply

Control voltage

The energy that the wind energy system requires for operation is fed in as control voltage from outside and must be monitored for electrical safety. After all, an undetected electrical fault is as significant as unexpected system downtime and also significantly increases the fire risk. At the same, unplanned service interventions can be expensive and time-consuming. Wind energy plant insurers also demand effective condition monitoring systems. The Bender Condition Monitoring System gives you a clear overview of all the relevant data for your system.

Product overview ISOMETER®
Market segment brochure Renewable Energy
Flyer Safe connection to the grid
Technical paper Insulation fault location - Planning and set up in the solar charging station at the University of Applied Sciences Bingen
Technical paper Electrical safety in control and auxiliary circuits
Technical paper Answers for tomorrow
DIN EN 61400-2
Wind turbines - Part 2: Requirements for small wind turbines

Network and system protection

Safe voltage and frequency levels

Network and system protection

Before internal generation systems (photovoltaics, water power, CHP, biogas, etc.) can feed electrical energy into the public grid, an automatic switching point must be installed between the generation system and the low voltage network. This checks whether the frequency and voltage fed in are within the specified range. The VMD three-phase voltage monitoring relay is used to pre-configure numerous standard specifications at the touch of a button.

Flyer Safe connection to the grid

Recommended measuring and monitoring relays:

CEI 0-21
Regola tecnica di riferimento per la connessione di Utenti attivi e passivi alle reti AT ed MT delle imprese distributrici di energia elettrica (Reference technical rules for the connection of active and passive consumers to the HV and MV electrical networks of distribution Company)

VDE-AR-N 4105
Anwendungsregel:2011-08 Erzeugungsanlagen am Niederspannungsnetz Technische Mindestanforderungen für Anschluss und Parallelbetrieb von Erzeugungsanlagen am Niederspannungsnetz

C10/11
Specifieke technische aansluitingsvoorschriften voor gedecentraliseerde productie-installaties die in parallel werken met het distributienet

BDEW-Richtlinie

DIN VDE 0126-1-1/A1
Selbsttätige Schaltstelle zwischen einer netzparallelen Eigenerzeugungsanlage und dem öffentlichen Niederspannungsnetz (Norm wurde zurückgezogen und durch DIN VDE V 0126-1-1 ersetzt)

G59/2
Recommendations for the Connection of Generating Plant to the Distribution Systems of Licensed Distribution Network Operators

G59/3
Recommendations for the Connection of Generating Plant to the Distribution Systems of Licensed Distribution Network Operators

G83/2
Recommendations for the Connection of Type Tested Small-scale Embedded Generators (up to 16A per phase) in parallel with Low Voltage Distribution Systems

G83/3
Recommendations for the Connection of Type Tested Small-scale Embedded Generators (up to 16A per phase) in parallel with Low Voltage Distribution Systems

Pitch-Control

Turn the blades safely toward the wind

Pitch-Control

Unexpected shutdowns of safety-critical systems and downtime for wind energy plants are avoided using a controller which monitors the pitch based on RCMS residual current monitoring systems. 

Product overview Residual current monitoring
Market segment brochure Renewable Energy

Azimuth control

Follow the wind for the highest efficiency and safety level

Azimuth control

The monitoring of the azimuth control by RCMA or RCMS enables early detection of creeping insulation deterioration. Shutdowns are avoided and the product safety of your system is improved. 

Product overview Residual current monitoring
Market segment brochure Renewable Energy
Flyer Safe connection to the grid

Communication

Centrally monitored, centrally under control

Communication

The decentralised wind energy systems (WES) are monitored centrally by a control centre. The necessary data and information is provided by Bender gateways and condition monitoring systems. Using a gateway or condition monitor from the COMTRAXX® range, the insulation resistance or any residual current occurring is reported to the higher level monitoring systems or a control centre.

Market segment brochure Renewable Energy
Flyer Safe connection to the grid

Recommended system components: