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Leading Conversion and Storage Technology for Energy Saving and Power Resilience
Stabiliti
– Islanding Switchgear Guide
TM
The contents in document are subject to change without notice.
The products presented are protected by several international patents and trademarks.
All rights reserved.
www.cet-america.com
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Table of Contents
Related Manuals for CE+T America Stabiliti 30C3 750/480
Summary of Contents for CE+T America Stabiliti 30C3 750/480
- Page 1 Leading Conversion and Storage Technology for Energy Saving and Power Resilience Stabiliti – Islanding Switchgear Guide The contents in document are subject to change without notice. The products presented are protected by several international patents and trademarks. All rights reserved. www.cet-america.com...
- Page 2 CE+T America or its authorized distributors. © Copyright 2020, CE+T America. All rights reserved. No parts of this document may be reproduced in any form without the express written permission of CE+T America. CE+T America logo are trademarks of CE+T...
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Page 3: Table Of Contents
Contents About This Document ........................... 5 Glossary of Terms ..........................6 Important Safety Instructions ......................7 Overview ............................... 9 System Rating ............................9 Reference Document ..........................9 6.1. MAN - 00115 – Stabiliti Series 30 KW – Installation and Operation Manual – V1.0..... 9 6.2. - Page 4 Table of Figures: Figure 1 - Microgrid Operation - Three Ways ..................... 10 Figure 2 - Pros and Cons of Different Microgrid Operation Methods ............11 Figure 3 - Microgrid Operation – Islanding Switchgear Method ..............12 Figure 4 - Field Wiring – Islanding Switchgear Supply Power ..............14 Figure 5 - Field Wiring - Utility and Load Side .....................
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Page 5: About This Document
1. About This Document This document is CE+T America proprietary. It is a customer facing document aimed to serve as an operational guide for Islanding Switchgear which is used to support Stabiliti converter’s microgrid operation. Document Revision History: Date Revision... -
Page 6: Glossary Of Terms
2. Glossary of Terms Acronym of Term Full Expression American wire gauge California Energy Commission GFDI Ground fault detection current Isolation monitor interrupter BESS Battery energy storage system, specifically e-ON’s. Based on context in the manual, BESS may refer to complete system including eON batteries and PCS. Power conversion system, specially Stabiliti 30C3 Photovoltaic Liquid Crystal Display... -
Page 7: Important Safety Instructions
3. Important Safety Instructions The following safety symbols are used in this manual: Danger – Procedure or situations that require action to prevent personal injury/death or damage to equipment/environment. Warning – Indicates a potentially hazardous situation that, if not avoided, can result in serious injury or death. - Page 8 Danger – Do not leave foreign objects in the enclosure. Keep the area around the enclosure clear of trash, debris, and other combustible materials. Warning – Personnel Qualification: Inspections and operations requiring access to lethal AC or DC voltages, should only be performed by qualified personnel. Warning –...
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Page 9: Overview
4. Overview This document serves as a guide to Islanding Switchgear which supports Stabiliti ’s microgrid operation. There are different ways Stabiliti’s can be commanded to form grid (i.e., microgrid operation) and using Islanding Switchgear is one of them. This document will go over field connections and operations overview of Stabiliti’s microgrid operation using Islanding Switchgear. -
Page 10: Microgrid Operation Overview
time but there might be a slight delay for individual units to start forming microgrid. Due to this limitation, this method is ideally suited for completely off grid applications. Islanding Switchgear supports full synchronous microgrid operation. 8. Microgrid Operation Overview There are three different ways of achieving microgrid operation. -
Page 11: Figure 2 - Pros And Cons Of Different Microgrid Operation Methods
Refer to the section below to gain better understanding of each term used in the table above. Definitions: • On grid means system is normally connected to grid. But when grid is lost, the Stabiliti system is required to form microgrid to support the loads. •... -
Page 12: Microgrid Operation Overview - Islanding Switchgear Method
9. Microgrid Operation Overview – Islanding Switchgear Method This is how the system shall be interconnected when using CE+ T supplied islanding switchgear: Figure 3 - Microgrid Operation – Islanding Switchgear Method 9.1. Field Wiring: The AC connection from Stabiliti will go into an AC distribution panel (not shown above) and then into “Islanding Switchgear”. -
Page 13: Field Wiring - Power Supply
9.3. Follow to Form Operation – Loss of Grid: When the grid is lost, the SEL relay detects the loss of grid and notifies the Stabiliti to start getting ready to form the microgrid. After this, SEL relay opens the GIC. Upon successful GIC operation, SEL reports back to Stabiliti that its ok to form microgrid now. -
Page 14: Field Wiring - Utility And Load
Figure 4 - Field Wiring – Islanding Switchgear Supply Power 11. Field Wiring – Utility and Load During the time microgrid is active, the Stabiliti and loads must be isolated from the utility tie in connection. To enable that, there is a “grid interconnect contactor” (GIC) within the Islanding Switchgear solely controlled by the SEL relay (which is also within the Islanding Switchgear). -
Page 15: Figure 5 - Field Wiring - Utility And Load Side
Figure 5 - Field Wiring - Utility and Load Side... -
Page 16: Field Wiring - Stabiliti Supply Power
12. Field Wiring – Stabiliti Supply Power There are two ways to power Stabiliti’s control board. Through 480 VAC or using an external 24 Vdc power supply. During microgrid operation, there is no 480 Vac supplied by Utility. So, to keep Stabiliti powered through the “following to forming”... -
Page 17: Stabiliti Port Settings Via Modbus
Figure 7 - Field Wiring - Stabiliti Control Wiring 14. Stabiliti Port Settings via Modbus In addition to using Islanding Switchgear, Stabiliti must have correct AC port settings to be able to form microgrid. For this, AC port must be set to FPWR or “Form Power” (modbus register 65, value of hex 502). Note that merely setting AC port to FPWR does not force Stabiliti to form microgrid. -
Page 18: Site Demonstration - Site Acceptance Tests (Sat)
Figure 8 - Panel LED Status Description 16. Site Demonstration – Site Acceptance Tests (SAT) Before performing a site demonstration, ensure following prerequisites are met: • Everything is interconnected and installed as per manual, local NEC and NFPA codes • Stabiliti’s are commissioned •... -
Page 19: Figure 9 - Site Acceptance Test Setup
Figure 9 - Site Acceptance Test Setup Follow the steps listed below: Note that the two components that will be changed during the tests are the AC disconnect (open or close) and Stabiliti’s AC setpoint (for the whole set up. So if the table below says 40 kw and if you have 4 stabiliti, then each stabiliti gets a 10 kw setpoint) Load size = 90 kw, Number of Stabiliti = 4 (120 kw), Battery Allowable Discharge rate = 100 kw. -
Page 20: Black Start Operation
17. Black Start Operation When the AC loads must be started from a completely off state and there is no grid present, Islanding switchgear can be used to facilitate “Black Start”. To be able to successfully turn on ALL the connected load, ALL Stabiliti must start synchronously at the same time. -
Page 21: Black Start Operation - Assumptions
Figure 11 - Powering Islanding Switchgear when there is no grid 17.2. Black Start Operation - Assumptions Black Start operation assumes there is no grid connection, and all AC loads are completely off. To be able to support black start, the Stabiliti must be connected to sufficiently charged batteries capable of supporting both inrush current and steady state operation of connected AC loads. -
Page 22: Back To Normal Operation
Figure 12 - Black Start - Initialization 17.4. Back to normal operation When black start operation is complete and system needs to be put back into normal mode, just move first switch to Auto/Island Off position. Microgrid will get synched with the grid when available and inverters will transfer from form to follow (PCSs must be in auto-mode) : Figure 13 - Switch Position in Normal Operation... - Page 23 End of Document...
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