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Leading Conversion and Storage Technology for Energy Saving and Power Resilience
Stabiliti
– Microgrid Operation
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 – Microgrid Operation 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 - SEL Method ..................... 12 Figure 4 - Microgrid Operation - Single Wire Method ................14 Figure 5 - Microgrid Operation - Modbus Method ..................
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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 Stabiliti converter’s microgrid operation. Document Revision History: Date Revision Notes Sept 15 , 2021 Initial draft... -
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 quick start guide to Stabiliti ’s microgrid operation. There are different ways Stabiliti s can be commanded to form grid (i.e., microgrid operation) and this guide will cover all different methods and their pros and cons. This document is aimed at providing a “bird’s eye view” only for all different microgrid operation method. -
Page 10: Microgrid Operation
If the load that is supposed to be protected is controllable, meaning it can be gradually brought online then an asynchronous way of controlling microgrid is a cheaper alternative. In asynchronous mode, individual Stabiliti are brought online one by one. They may all receive “microgrid command” at the same time but there might be a slight delay for individual units to start forming microgrid. -
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 - Sel Method
9. Microgrid Operation – SEL Method This is how the system shall be interconnected when using CE+ T supplied islanding switchgear: Figure 3 - Microgrid Operation - SEL Method Field Wiring: The AC connection from Stabiliti will go into an AC distribution panel (not shown above) and then into “Islanding Switchgear”. - Page 13 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.
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Page 14: Microgrid Operation - Single Wire Command Method
10. Microgrid Operation – Single Wire Command Method This is how the system shall be interconnected when using “Single Wire Method”: Figure 4 - Microgrid Operation - Single Wire Method Field Wiring: The “power supply and digital control signals will go from “Islanding Assist Box” to one Stabiliti and then connection to subsequent Stabiliti will be daisy chained from this Stabiliti. - Page 15 System Startup – Initial Start of System: The system must be set up when the grid is present. Upon interconnecting everything, the CCS shall engage 24 volts to the one digital signal connected to Stabiliti and at the same time it shall energize/close the Grid Interconnect Contactor (GIC).
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Page 16: Microgrid Operation - Modbus Command Method
11. Microgrid Operation – Modbus Command Method This is how the system shall be interconnected when using “Modbus Method”: Figure 5 - Microgrid Operation - Modbus Method Field Wiring: The UPS box must be connected to 24 volts dc power supply pins within Stabiliti. Apart from this, there is no additional/special field wiring. - Page 17 enough PV, storage or DC power sources (connected to Stabiliti’s DC port), the Stabiliti system can now be connected to the load. Follow to Form Operation – Loss of Grid: Not applicable. Form to Follow Operation – Grid is Back: Not applicable.
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