Mita-Teknik WP-LINE 511 MK ll CANOPEN, 978051102

Realtime DSP grid measurement module ? Surveillance of 3 currents and 3 voltages ? Calculation of all grid data ? Supplies data for machine control ? Supplies data for production statistics ? New, improved algorithms for precise, fast and reliable grid measurements ? Measures grid quality data ? Supports FRT/LVRT In General The WP-Line 151 grid measurement module is part of the WP4x00 Control Concept which has been specially designed to control large wind turbines - on and offshore. The WP4x00 Control Concept ensures optimal operation, high security and advanced data collection. The concept typicaly consists of a power supply/backbone module, a WP4x00 controller, a grid measurement module as well build-up as an analog/digital I/O module dependent on the specific configuration task. The WP4x00 Control Concept makes it possible to have redundant solutions. The concept is constructed as a plug-and-play system with automatic module detection and error reporting. Features The WP-Line 151 module has three voltage and three current analog inputs. The module is powered from the WP-Line BUS. The WP4x00 controller can automatically update the programs via the network. The communication to the WP4x00 controller is event-based, which means that only changed values are transmitted via the network. Analog part is based on 16bit precision ADC. WP-Line151 module performs three basic functions: - Calculates main grid parameters - Calculates grid quality parameters - Provides WP4x00 controller with these data Main grid parameters like voltage, current, active and reactive powers, etc. are used by WP4x00 control application for turbine overall control. Calculation of main grid parameters by precise and reliable DSP algorithms has the following features: - Frequency calculation algorithm assures measurement accuracy 0.01 Hz - Voltage and currents are calculated using FFT algorithms - Powers and energies are measured according to IEC 61400-21 standard - Precise DSP algorithms and high update rate make support for FRT/LVRT Apart from measuring main grid parameters the WP-Line 151 module monitors wide range of grid quality parameters. This monitoring is carried out in two directions: - Asynchronous detection of most important grid disturbances and collection of correspondent signals containing disturbances with pre- and post- data. Collected data is then sent to WP4x00 controller and further to Mita-Teknik?s Surveillance system. (Grid Trigger log functionality) - Permanent monitoring of live grid quality data (Grid Oscilloscope functionality) - Flexible configuration of grid quality measurements. Channels and grid disturbance type to monitor as well as conditions for disturbance data collection are user configurable Grid Trigger log functionality includes detection of: - Transient events caused by switching events in the grid. Reducing grid disturbances number caused by transient events leads to increased generator?s lifetime - Voltage fluctuations - sag and swell. Voltage sag is a grid disturbance typically caused by a short circuit. Voltage swell is a grid disturbance caused by earth fault on another phase. Detection and analysis of these events may allow to avoid insulation ageing - Frequency deviations as consequence of wind generator?s trip leading to short time under- or overvoltage - Unbalance disturbance due to problems with a phase weak connection leading to increased load on one phase The module has been designed to undertake grid voltage measurements via the WP3090 interface. Relay output for fast switching (customer-specific).