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Background
ESAC worked on the Ferndale project which was somewhat ground breaking in HONI interfacing as standards were not defined as they are today resulting in changes and additions over the years. Later projects have been designed in accordance with HONI requirements at that time. Two projects with the same HONI feeder and transfer trip are cascaded applications sharing both transfer trip and SCADA interfaces. Unmanned wind farms have auto-reclose for system/grid faults re-energization and utilize WTG SCADA systems.

Approach and Methodology
With technical adherence to HONI requirements, cost conscious protection & control standards are standardized for improved quality assurance with operational staff consistency. The protection & control differentiates external HONI system/grid (auto-reclose energization) and internal faults (lockout). Main RTU integrates protection relays with hardwired points providing SER (Sequence of Events Recording), HONI and WTG SCADA interfaces. DSL VPN interfaces are used for both WTG users SCADA interfacing and protection technical support.

Key Challenges
Achieving an accurate project budget and schedule with an evolving HONI interface and system communications, involving multiple organizations required adequate foresight and risk analysis. A priority was to develop a standard design that supports flexibility for the finite changes encountered. Additionally, defining a WTG short circuit model contribution to ensure accurate protective device implementation and Arc Flash conditions.

Support
ESAC offers technical support to address protection trips, communications failures, HONI and IESO technical interfacing. Maintenance and upgrades are performed as required with assistance of planning technical details and budgeting. New projects' technical reviews are performed for standard designs with budgeting and submissions (Form-B, Philosophy, Pathloss study, etc.).
 
         



   151 Meg Drive
   London, ON
   N6E 3Z7

   Phone: (519) 686 - 6722
   Fax: (519) 686 - 1486

   Sales: esac.sales@esac.com
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