HSP NTG-3000, Руководство по эксплуатации

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HSP GmbH Zum Handwerkerhof 2 90530 Wendelstein Tel. 09129 / 2852-0 Fax: 09129 / 2852-11 Web: www.hsshsp.de EMAIL: HSP@hsshsp.de
NTG-3000 Operating Instructions Version 2.11
Page 15 of 18
13.3 Rate-of-Change-Limiter
The Rate-of-Change-Filter prevents, that the calculated compensated frequency ( f
comp gefiltert
)
makes a step in case of a phase failure. This cannot physically occur due to the inertia of the
generator. The filter limits the change of the compensated frequency to a value. This value is
calculated by a predetermined parameter (
Inertia of the synchronous machine H see NTG-
3000 - Transducer ).
The limits are calculated like this:
Max = (T
cycle
* 1/H) ;
in which T
cycle
specifies the time period, by which the Rate-of-Change-
Limiter algorithm is performed.
Min = -Max
The limited compensated frequency is calculated using the following formula:
Note: If the analog input filter is enabled (see 11), the rate-of-change filter is disabled!
14 Data transmission
14.1 Ethernet
The transducer sends the measured values for all channels to target IP address
192.168.1.100
cyclically in a UDP packet.
14.2 PROFIBUS
The measured values for all channels are transmitted to the PROFIBUS master upon request.
14.3 Data format
A description of the structure of the data transmitted via Ethernet or PROFIBUS can be found
in the document:
“Transducer Data Protocol”.
15 Error signaling
Error conditions are indicated by means of the ERROR LED. The exact error types are also
transmitted via Ethernet and PROFIBUS (see document
“Transducer Data Protocol”
).