Test Of The Boundary Between Zone 1 And Zone 2, Which Is Defined By The; Parameter Reachz1 - Hitachi RED670 Commissioning Manual

Section 11
Testing functionality by secondary injection
11.4.12.3

Test of the boundary between zone 1 and zone 2, which is defined by the

parameter ReachZ1

The trajectory of the impedance traverses the lens characteristic in zone 2
Preliminary steady state test at 50 Hz
• Go to Main menu /Test /Function status /Impedance protection /OutOfStep(78,Ucos) /
OOSPPAM(78,Ucos):1 /Outputs to check the available service values of the function block
OOSPPAM.
• Apply the following three-phase symmetrical quantities (the phase angle is related to phase L1):
V
ts
EQUATION14065 V1 EN-US
∠
V
EQUATION14058 V1 EN-US
frequency of V
I
50 s
EQUATION14059 V1 EN-US
∠I
50s
frequency of I
It
fs
EQUATION14062 V1 EN-US
∠I
tfs
frequency of I
• Check that the service values (VOLTAGE, CURRENT, R(%), X(%)) are according to the injected
quantities and that ROTORANG is close to 3.14 rad. For this particular injection the service
values are:
•
•
•
•
•
Note that these values identify a point inside the lens characteristic, in the Zone 2, that is close to the
boundary between zone 1 and zone 2. The START is issued, but no TRIP is performed.
Execution of the dynamic test
The test may be performed by using two states of a sequence tool that is a basic feature of test sets.
• State 1: pre-test condition.
Steady voltage and current are applied in order to get a steady high impedance, that is a point in
the plane R-X that is far away from the lens characteristic. Define the following three-phase
symmetrical quantities (the phase angle is related to phase L1):
142
V
,
VT s
1 1 . 1 1 1435 .
V
= × × = ×
, 1
t RZ
V
VT p ,
 
ForwardX
=  =
arctan

ts
 
ForwardR
= 50 Hz
ts
1
I
CTs 10459
I
= × = ×
50
9000
I
CTp
= 0º
= 50 Hz
50s
I 1
I CTs 10459
= × = ×
tf
I 9000
CTp
= 0º
= 50 Hz
tfs
VOLTAGE = 1.58 kV
CURRENT = 20918 A
R = 1.08%
X = 7.85%
ROTORANG = -3.04 rad
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0 1 .
11 44 .
V
× =
13 8 .
 
59 33 .
 =
arctan 82. . 14°

 
8 19 .
= . 1 162
A
1 162 . A
=
1MRK 505 378-UEN Rev. K
GUID-BE180E07-7D4B-4842-81FB-244DE8897430 v1
GUID-17F6AC8D-1F57-4245-A61D-776D469DD153 v1
GUID-3D42E43D-873E-4271-9AAF-3B2789FF3B17 v1
(Equation 40)
(Equation 41)
(Equation 42)
(Equation 43)
GUID-53964189-42E4-4C4B-BFCD-64888BA938EF v1
Line differential protection RED670
Commissioning manual