Operation Principle - ABB RES670 Technical Manual

1MRK 511 408-UUS A
15.2.6
Phasor measurement unit RES670 2.2 ANSI
Technical manual

Operation principle

Start matrix
The Start Matrix function requires that a protection function delivers the directional
output signals in a fixed order to Start Matrix.
A directional input signal STDIRX of the Start Matrix is of type word. Each input
contains 14 individual Boolean signals, which are positioned as, see Figure 151.
STDIRX =[ b0, b1, b2, b3, b4, b5, b6, b7, b8, b9, b10, b11, b12, b13, b14 ]
b0= START (start)
b1= FW (forward)
b2= REV (reverse)
b3= STL1 (startL1)
b4= FWL1 (forwardL1)
b5= REVL1 (reverseL1)
b6= STL2 (startL2)
b7= FWL2 (forwardL2)
b8= REVL2 (reverseL2)
b9= STL3 (startL3)
b10= FWL3 (forwardL3)
b11= REVL3 (reverseL3)
b12= STN (startN)
b13= FWN (forwardN)
b14= REVN (reverseN)
The StartMatrix function contains two function: the START criteria and the
DIRECTION criteria, see Figure 150.
The START criteria is to ensure that a forward and reverse signal shall come together
with a start signal to pass through the block. This is done individually for each
protection function connected to the StartMatrix via the STDIRX inputs, see Figure
151.
All STDIROUT signals are then connected via an OR gate, see Figure 150.
The DIRECTION criteria allow either forward or reverse (phase-wise forward FWLx
or forward neutral FWN or phase-wise reverse REVLx or reverse neutral REVN) to pass
through to the general STDIR output. If both forward and reverse are active phase-wise
(e.g. REVLx=FWLx = True) or at neutral (e.g. FWN = REVN = True) at the same time,
none will be shown, see Figure 152.
Section 15
Logic
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