GE D90 Plus - Hardware Architecture

CHAPTER 2: PRODUCT DESCRIPTION PRODUCT DESCRIPTION
D90
PLUS
LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL 5
Figure 1: Functional architecture
The D90
Plus
also includes shared operand functionality. Output signals from the various
functions can be assigned as shared operands available to all functions. These signals can
then be assigned as inputs within other functions.
For example, assume that the PHASE TOC1 OP protection FlexLogic operand is required as a
signal within the automation function. This signal is then assigned as a shared operand. As
such, the PHASE TOC1 OP operand subsequently becomes available to the automation
function by appearing in the list of available operands.
Hardware architecture
The unit is a microprocessor-based device. It has a modular design, its chassis containing
discrete modules that interface over a common bus. Each module has a specific purpose.
Several modules are required for basic operation of the device, while others are optional.
The power supply module receives AC or DC power from an external supply and produces
conditioned 12 V DC power for all modules in the chassis. The power supply also generates
48 V DC power for external contact wetting. The output contact indicating a critical failure
of the unit also resides on this module.
Virtual outputs
Elements…
FlexLogic
Virtual analogs
Data logger,
synchrophasors
Protection
Protection analog values
FlexAnalog values
Protection operands
Virtual inputs
Shared operands
Automation
Virtual analog values
FlexAnalog values
Elements…
Automation logic
Automation operands
Virtual inputs
Shared operands
Digital fault recorder
FlexAnalog values
Equipment manager
Shared operands
Metering
Front panel HMI
Remote
inputs
Automation
contact
inputs
Protection
contact
inputs
CTs and VTs
DSP
Automation
contact
outputs
870701A3.CDR
FlexAnalogs
Virtual outputs
Protection operands
Shared operands
Transient record,
Disturbance record,
Fault report
Battery monitor
Breaker arcing
FlexAnalog values
Shared operands
Protection operands
Automation operands
Metering operands
Equipment manager operands
Annunciator,
Mimic diagram
Shared
operands
Protection
contact
outputs
Teleprotection
inputs
Direct
inputs