7.2.1
Power flow sign conventions
The power flow sign convention of network circuit breaker in PML630 is considered
positive if the power flow direction is from the lower busbar number to the higher
busbar number (for example, 1...2 or 2...4 or 1...3), else considered negative. The
power flow sign convention in PML630 can be corrected by the settings
Send Pow
convention
or
Rcv Pow convention
for sending-end circuit breaker IED or receiving-
end circuit breaker IED respectively in NCBDCSWI, if required.
shows the correction for power flow sign convention in PML630 for bus
coupler/tie circuit breaker connected between busbar = 1 and busbar = 2. Similar logic
applies to other instance of network circuit breaker.
Table 257:
Power flow sign convention in PML630 IED for network circuit breaker
Power flow sign convention in
sending-/receiving-end CB IED
Power flow sign convention in
PML630 IED
Send Pow convention or Rcv Pow
convention setting
Bus bar=1
Bus bar =2
Bus bar=1
Bus bar=2
Sending end
circuit breaker
OR
Receiving end
circuit breaker
GUID-16A8EF87-2328-4491-8B32-802A521C4869 V1 EN
Bus bar=1
Bus bar =2
Bus bar=1
Bus bar=2
Sending end
circuit breaker
OR
Receiving end
circuit breaker
GUID-16A8EF87-2328-4491-8B32-802A521C4869 V1 EN
Positive XX
Busbar=1
Busbar =2
Busbar=1
Busbar=2
Sending end
circuit breaker
OR
Receiving end
circuit breaker
GUID-52ECA53D-228D-4882-B0C0-C4FCDC850B30 V1 EN
Busbar=1
Busbar =2
Busbar=1
Busbar=2
Sending end
circuit breaker
OR
Receiving end
circuit breaker
GUID-52ECA53D-228D-4882-B0C0-C4FCDC850B30 V1 EN
Negative XX
PML630 processes the power values in kW. Hence, sending-end
circuit breaker IED power or receiving-end circuit breaker IED power
units in PML630 can be converted to kW based on the
Send Pow
convention
or
Rcv Pow convention
setting respectively. In
“Positive XX” means “Positive W”, “Positive kW” or “Positive
MW”. See NCBDCSWI for details regarding the power unit
conversion.
The power flow sign convention of the source in PML630 is positive if the power flow
direction is towards the busbar, otherwise it is negative. The power flow sign
convention in PML630 can be corrected with the
Power convention
setting for the
power source in PSCSWI.
shows the correction for power flow sign convention in PML630 for the
power source.
Section 7
1MRS757256 F
Power management functions
204
PML630/Compact Load-Shedding Solution
Technical Manual
Summary of Contents for Relion 630 Series
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