relay setting basics

Marble River

Relay Settings Basis For The

MARBLE RIVER WIND PROJECT

May 21, 2012

Prepared For

MARBLE RIVER, LLC Revision 0 1 2

Date 3/29/12 4/16/12 5/21/12

By JK JK JK

Approved By LAM RJ JK

Marble River Settings Basis

1. INTRODUCTION

The Marble River collector substation is being constructed for the Horizon Wind Energy Marble River Wind Farm which consists of 73 wind turbine generators (WTGs) each with a nominal rating of 3.0MW for a total generation capacity of 219MW. TRC is providing protective relay settings for the collector substation. Guidance for the protective relay settings, substation control and automation, as well as arc flash studies are provided by POWER Engineers, Inc. This document provides the criteria used by TRC to complete the relay settings.

Figure 1: System Overview Diagram

05/21/12

1

Rev. 2

Marble River Settings Basis

2.

CRITICAL NOTES AND ASSUMPTIONS

2.1

POWER Engineer’s supplied a settings guide, Marble River Protective Relaying Functional Descriptions – Revision 0, which was used where applicable in the completion of the collection system relay settings. This document is located in the Appendix for reference.

2.2

All impedance and short circuit contribution information in the supplied short circuit model used for calculating relay settings is based on Horizon/EDPR information supplied to the date of this document. All calculations for the system short circuit model are located in the Appendix for reference.

2.3

Proper coordination of protective devices may not have been achieved to be able to protect collector substation equipment. These instances are documented in the settings calculations.

2.4

All protective equipment for T2 and the 230kV system are located in the point of interconnection station operated by NYPA, Patnode Substation, and are excluded from this document. Overcurrent protection is provided by the following relays to the 34.5kV collector substation: 87TBP/T2, 87TP/T2 & 87TS/T2.

2.5

Capacitor Banks C1-C3 have been removed from the design of the collector substation and therefore no documentation of protective devices is provided.

3.

PROTECTION OVERVIEW

3.1

The following table lists the protective devices covered by this document. The name, model, brief description, and protective functions are provided. Refer to relay calculations section for more detailed information.

Relay 50/62BF/T2MR

Relay Type SEL-351S

Relay Description 34.5kV Main Breaker Failure

Protective Elements 50FD

Element Function Breaker failure fault detector

05/21/12

2

Rev. 2

Marble River Settings Basis

87B/34.5

SEL-587Z

34.5kV Bus Differential

62BF

Breaker failure timer

27

230kV UV Trip

87

High impedance bus differential

50/51/F1-F8

SEL351S

Collector Overcurrent

50FD

Breaker failure fault detector

62BF

Breaker failure timer

59

Over voltage

81U/O

U/O Frequency

67P

Phase DTOC

51P

Phase TOC

51G

Gnd TOC

50P

Phase IOC

50G

Gnd IOC

51G-2

Gnd high set TOC

50GDT

Gnd Definite TOC

Table 1: Protective Device Overview

3.2

The following table lists the lock out relays covered by this document. The name and description of operation are provided.

Lockout Relay 86BF/T2MR

Function T2MR Breaker

Tripped By

Trips

50/62BF/T2MR

Failure Lockout

05/21/12

3

Blocks

F1

F1

F2

F2

F3

F3

F4

F4

F5

F5

F6

F6

F7

F7

F8

F8

2102-TC1

2102-TC1

2102-TC2

2102-TC2

2114-TC1

2114-TC1

2114-TC2

2114-TC2

Comments

Rev. 2

Marble River Settings Basis

86B/34.5

34.5kV Bus

87B/34.5

F1

F1

Trip by feeder

Differential

50/51/F1

F2

F2

breaker is for BF

Lockout

50/51/F2

F3

F3

function only.

50/51/F3

F4

F4

50/51/F4

F5

F5

50/51/F5

F6

F6

50/51/F6

F7

F7

50/51/F7

F8

F8

50/51/F8

T2MR

T2MR

SHORT 587Z

Table 2: Lock Out Relay Overview

3.3

The following table summarizes the primary and backup protection elements by zone of protection.

Zone of Protection 34.5kV Bus

Primary Protection

Back Up Protection

Relay

Relay

Trips

(Element) 87B/34.5

86B/34.5

(87)

(Element) 87TBP/T2

Trips 86TBP/T2

(51H)

Comments

All back up equipment is located in NYPA Patnode Control Building.

87TP/T2

86TP/T2

(51H, 51L,

Back up protection lock out

51LN)

relay will isolate T2.

87TS/T2

86TS/T2

(51H, 51L, 51LN, 51N) F1

50/51F1

F1

87TP/T2

86TP/T2

(67P, 51P,

(51L,

located in NYPA Patnode

51G, 50P,

51LN)

Control Building.

50G, 51G2, 50GDT)

05/21/12

All back up equipment is

Back up protection lock out 87TS/T2

4

86TS/T2

relay will isolate T2.

Rev. 2