Turn to Turn Fault Detection for Air Core Reactors

The goal of this project is to create a small scale model of a 3 phase dry type shunt air core reactor in order to simulate and test inter-turn faults. The project will also entail an RTDS model of the system to further test more in depth fault scenarios, as well as correlating data.

Background
Avista deployed a system of air core reactors at their Noxon Rapids Dam in Montana in order to drop the bus voltage at the dam to help keep voltage levels even across the grid. Although the reactors have common protection schemes deployed already, there is currently no way for a protective relay to detect an inter-turn fault within a single phase of an air core reactor; a situation which could lead to complete failure and destruction of a reactor.

Deliverables


The goal of this project is to develop a protective relaying algorithm which will enable an IED, specifically an SEL 487E, to detect inter-turn faults within a single phase of an air core reactor.

Client Interview

 * Wrote a list of technical, budget, and miscellaneous questions for client to make sure we approached this project fitting our client's needs
 * From the answers we obtained, we were able to build a better foundation for starting this project
 * [[File:VARsity_Client_Question_Whiteboard.pdf]]

Lead Instructor and Technical Advisor Meetings

 * Every week we meet with our lead instructor and our technical advisor to go over the progress of the project
 * Topics such as due dates, technical progress, budgets, and brainstorming are all discussed during these meetings

Tour of Noxon Rapids Dam and Reactor Substation

 * The VARsity senior design team along with the graduate student mentor were given a tour of Avista's Noxon Rapids Dam and reactor substation in order to ask questions and learn more insight into exactly how the work performed in the senior design project would benefit our customer's SEL and Avista.

Calculations

 * [[File:Calculations_VARsity.PNG]]

Research

 * [[File:Practical_Consideration_and_Experiences_Protecting_230kV_Shunt_Air-Core_Reactor_Banks.pdf]]

Scaled Test Circuit
In order to create an environment for testing, it will be necessary to build a scaled test circuit that can operate at 120V which we can use to manipulate in order to test for inter-turn faults.

RTDS Model
In order to correlate data, it is necessary to have an RTDS model simulation program to see if certain test points give the same data during a fault condition.

The RTDS model also makes it easier to show the magnitude of the fault current that would flow through a shorted winding.

Minutes

 * [[File:9.14.16_Meeting_Minutes.pdf]]
 * [[File:9.20.16_Meeting_Minutes.pdf]]
 * [[File:9.28.16_Meeting_Minutes.pdf]]
 * [[File:10.4.16_Meeting_Minutes.pdf]]
 * [[File:10.21.16_Meeting_Minutes.pdf]]
 * [[File:10.25.16_Meeting_Minutes.pdf]]
 * [[File:11.1.16_Meeting_Minutes.pdf]]
 * [[File:11.8.16_Meeting_Minutes.pdf]]
 * [[File:11.15.16_Meeting_Minutes.pdf]]
 * [[File:11.29.16_Meeting_Minutes.pdf]]

Client Interview

 * [[File:VARsity_Client_Question_Whiteboard.pdf]]

Design Review

 * [[File:VARsity_Design_Review_1.pdf]]