Central Account Management is an authentication infrastructure that offers a secure
solution for enforcing access control to IEDs and other systems within a substation.
This incorporates management of user accounts, roles and certificates and the
distribution of such, a procedure completely transparent to the user.
The Flexible Product Naming allows the customer to use an IED-vendor independent
IEC 61850 model of the IED. This customer model will be exposed in all IEC 61850
communication, but all other aspects of the IED will remain unchanged (e.g., names on
the local HMI and names in the tools). This of
fers significant flexibility to adapt the
IED to the customers' system and standard solution.
M11788-3 v10
Communication via optical connections ensures immunity against disturbances.
GUID-99777C26-F53E-4D5D-B0C6-640597A2A2FD v5
By using patented algorithm REG670 (or any other product from 670 series) can track
the power system frequency in quite wide range from 9Hz to 95Hz (for 50Hz power
system). In order to do that preferably the three-phase voltage signal from the generator
terminals shall be connected to the IED. Then IED can adopt its filtering algorithm in
order to properly measure phasors of all current and voltage signals connected to the
IED. This feature is essential for proper operation of the protection during generator
start-up and shut-down procedure.
REG670 can be used in applications with the IEC/UCA 61850-9-2LE process bus with
up to eight merging units (MU) depending on the other functionality included in the
IED.
GUID-295DE734-E7DD-42FF-B402-151B7F38E36E v3
This adaptive filtering is ensured by proper configuration and settings of all relevant
pre-processing blocks, see figure
334 and 335. Note that in all pre-configured REG670
IEDs such configuration and settings are already made and that three-phase voltage at
the generator terminals are used for frequency tracking. With such settings REG670
will be able to properly estimate the magnitude and the phase angle of measured
current and voltage phasors in this wide frequency range.
Note that the following functions will then operate properly in the whole frequency
interval:
•
Generator differential
• Transformer differential
• Four step overcurrent protection (DFT based measurement)
• Four step residual overcurrent protection
• Over/under voltage protection (DFT based measurement)
• Residual overvoltage protection
• Overexcitation protection
• General current and voltage protection
• Directional over/under power function
• Measurement function (that is, MMXU)
• and so on
Section 2 1MRK 502 071-UUS A
Application
40 Generator protection REG670 2.2 ANSI and Injection equipment REX060, REX061, REX062
Application manual
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