ABB UNITROL® 6000 PSS Standalone

 Enhance your excitation system to comply with Grid Code regulations at minimal cost

• Extend the life cycle of your current excitation system by adding functionality, fast and simple

• Advanced solutions and services to comply with local grid codes regulations

• Reliable product with highest availability

• Worldwide network of UNITROL® specialists at your service

The challenge

Grid codes are constantly changing due to the new and unprecedented network developments.

Therefore, installed plant equipment requires to be upgraded/replaced to comply with the network

regulations which leads to increased extended outages and costs.

PSS SA is a cost-effective solution to be compliant immediately.

Why Power System Stabilizer Standalone (PSS SA)

Power system stabilizers (PSS) are commonly used to damp various types of oscillation modes,

as from interarea oscillations in large transmission networks to local oscillation modes of synchronous

generating units. This is done by adding a stabilizing signal to the voltage regulator of the existing

excitation systems.

The comprehensive and flexible solution: ABB’s UNITROL® 6000

Power System Stabilizer Standalone

Extend the life cycle of your current excitation system by adding functionality, fast and simple

• For any excitation brand – Indirect or Static excitation systems

• Extending the life cycle of your current system and enabling compliance with today’s complex grid code

regulations

• Full Power System Stabilizer (PSS) functionalities according latest IEEE421.5 standards (PSS 2A/2B/2C

or 4B/4C)

Advanced solutions and services to comply with the grid codes regulations

• Build-in signal injections and high-end recording features to support 

- System identification (of Generator and Grid), even when no dynamic Model data is available

from the OEMs- Fast and efficient capturing of network disturbances,

supporting post-mortem analysis of large-scale network events and prove related unit

compliance (e.g. NERC MOD-026-1)- Post-mortem analysis of failure on the complete gen-set.

• Adaptive PSS (APSS), with a patented grid observer, which optimizes the PSS settings based on actual

network and operation conditions.

• Advanced Speed measurement algorithms based on dynamic generator models to improve PSS

performance during interarea and local modes

• Dedicated RoCoF (Rate of Change of Frequency) PSS Blocking function to block PSS during large scale

grid frequency changes, to avoid malfunctions.

• Designated filter networks to avoid torsional interactions, and risks of mechanical damages

Reliable product with highest availability

• Based on UNITROL® 6000 X-power control devices,with proven track records

• Options for redundant configurations

• Extended IOs, as DCS interface and special configurations (e.g. for Pump storage with PSS

operation in generating and pump mode)

• Dedicated touch screen HMI Interface to have control and monitoring at your fingertips.

Worldwide network of UNITROL® specialists is at your service

Installation and commissioning

• The professionalism, extensive experience and multilingual skills of ABB’s engineers ensure a satisfactory

installation and commissioning.

Power System simulation services

• Advanced services to represent and simulate the power plant in a digital environment (e.g. PowerFactory)

• Optimizations of PSS settings according to local grid code requirements

• Full grid connection and plant performance simulation studies