CRE Technology GENSYS 2.0 User Manual

A53 Z0 9 0020 L En Technical documentation
Chapter : Additional functions
111
13 Additional functions
13.1 Load sharing using integral (de-drooping)
13.1.1 Introduction
This function is for generators in island mode (no mains), it allows perfect load sharing at the right
frequency even if the generators are not the same.
When several generators are on the bus bar, one takes a central role with a fixed frequency of 50Hz. The
other generators determine load sharing using an integral so that each one has a perfect share.
The set point of the central frequency is the parameter [E1080] (or [E1081] if selected).
When the GENSYS 2.0 starts, one genset is elected to be the master (the first one on the bus). The master
determines the central frequency and load sharing is without an integral. The other gensets determine the
load sharing with an integral, but without using the central frequency.
When you have several generators paralleled with mains, the central frequency is disabled.
13.1.2 Procedure
1. In [Manu] mode, using [+] and [-], adjust the speed control output (G9-G11) to obtain the
desired frequency +/-2Hz for each genset.
2. Test that load sharing is working properly (default values inhibit the integral).
3. Activation of central frequency on first genset:
On the front panel of the GENSYS 2.0 (or on the PC)
In the menu: « Configuration/Modification by variable n° », set
 [E1476] on 2,
 [E1900] on 5: Proportional kW load sharing
 [E1901] on 2: Integral kW load sharing
Access, in level 2, to menu: « Configuration /Control loops/kW control» and set the following
parameters ::
kW sharing loop
-G = 50 % [E1102]
Hz loop
-G = 25% [E1902]
4. Adjust genset speed to give 49Hz using the speed governor (GENSYS 2.0 in manual mode without
load).
5. Switch to [Test] mode. When the breaker is closed frequency should return to 50.00Hz within 5
seconds.
6. Adjust the Hz central gain [E1902] to adjust the time if needed.
7. Repeat step 5 for all gensets.
8. Test the load sharing by changing the nominal frequency of one generator to 49Hz.
Bus frequency should remain at 50Hz and kW load sharing within 2% of that desired. The stability of load
sharing is adjusted with kW sharing GPI / I [E1901]

CRE Technology GENSYS 2.0 Specifications

General

Brand	CRE Technology
Model	GENSYS 2.0
Category	Control Unit
Language	English