Date Description Revision May 19, 2008

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2 Voltage and Reactive Power Schedule r10 Revision History Date Description Revision May 19, 2008 Initial E.ON document to establish guidelines applicable to all generator owners connected to /KU r0 May 19, 2009 Derek Rahn transmission system. Annual Review. Added primary and backup measurement location. Adjusted target voltage for Cane Run Switching 138 kv and Paddy s Run 138 kv. May 4, 2010 Derek Rahn Annual Review. Removed OMU Smith Units & added KMPA Feb 11, Michael Toll Update Company name and Voltage 2011 schedules at Cane Run & Paddys Run June, 2012 Delyn Kilpack Widen the tolerance band; added clarification to Ghent #1 voltage schedule; added criteria for generators exempt from schedule; ; added clarification on expected duration for Return To Normal status change July 1, 2013 Delyn Kilpack / October 1, 2014 July 24, 2015 October 1, 2015 July 22, 2016 May 30, 2017 Matthew Burns Updated sections A. and B. of voltage schedule. Added footnote about hourly average voltage. Changed voltage measurement keys at Ghent. Annual Review; Updated to correspond with VAR-001-4; Added voltage schedule for Cane Run 7 Annual Review; Removed Cane Run 4, 5 & 6 from Voltage Schedule Removed Green River 3 & 4 from Voltage Schedule Annual Review; Listed EKPC as owner of Bluegrass units Annual Review; Added Brown Solar and Paris to Exempt list; Added KYMEA to distribution list r1 r2 r3 r4 r5 r6 r7 r8 r9 r10

3 Voltage and Reactive Power Schedule r10 Distribution The document will be reviewed as necessary by the Transmission Operator. The TOP will distribute the document to the following personnel initially and immediately following any permanent revisions to the document: Mgr., Generation Dispatch Operations EKPC Generator Operator KMPA Paducah Primary Generation, Plant Supervisor KYMEA Generator Operator The document will be provided to the TVA Reliability Coordinator and adjacent Transmission Operators within 30 calendar days of a request. 1 1 VAR R1.1

4 Voltage and Reactive Power Schedule r10 Voltage and Reactive Power Schedule The following voltage and reactive power schedules are issued by Louisville Gas and Electric Company ( ) and Kentucky Utilities Company ( KU ) (collectively or the Company ) as Transmission Operator ( TOP ). This schedule may be updated from time-totime, either by (a) re-issuance of this written schedule, which new schedule will permanently supersede this schedule or (b) phone calls from the TOP to the applicable generating plant operator, which schedules will be temporary changes in this schedule to address real-time reliability issues. It should be noted that, as a temporary change, generators adhering to a voltage schedule may be required to operate to a reactive power schedule. The Generator Operator ( GOP ) shall operate each generator connected to the interconnected transmission system in the automatic voltage control mode (with its automatic voltage regulator (AVR) in service and controlling voltage) unless the generator is exempted by the TOP or the GOP has notified the TOP of one of the following: That the generator is being operated in start-up, shutdown, or testing mode pursuant to a Real-time communication or a procedure that was previously provided to the TOP; or That the generator is not being operated in automatic voltage control mode or in the control mode that was instructed by the Transmission Operator for a reason other than start-up, shutdown, or testing. specifies target voltages and tolerance bands on the high voltage side of the generator step-up transformer. High voltage side refers to a location electrically connected to the generator step-up transformer, as designated by the Voltage Controlled Bus in Table 1, that has been determined by for controlling voltage in order to most efficiently protect equipment and allow for the reliable operation of the Interconnection. All on-line generators at a given plant shall control voltage (within the tolerance band) at the specified transmission bus given in the Table 1 below unless: A. While trying to increase the voltage above the lower bound, each on-line generating unit at the facility is operating within five percent of maximum VAR output, or at a Facility Rating. B. While trying to decrease the voltage below the upper bound, each on-line generating unit at the facility is operating within five percent of minimum VAR output, or at a Facility Rating.

5 Voltage and Reactive Power Schedule r10 Table 1 Owner Plant Voltage Controlled Bus Ghent 1 4 Ghent units 2, 3 and 4 Trimble County all units Mill Creek all units Ghent 138 kv Ghent 345 kv Trimble County 345 kv Mill Creek 345 kv EKPC Bluegrass all units Buckner 345 kv Brown more than one unit online Brown only one unit online Cane Run 7 Paddy s Run unit 13 Brown North 138 kv Brown North 138 kv Cane Run CT 138 kv Paddy s Run 138 kv Voltage Measurement (SCADA Name/SCADA Key) Primary 3 Backup Target Voltage (kv) 2 7GHENT KV 7GHENT KV (ALT) See footnote below SEL KV SOUTH BUS SEL KV NORTH BUS TC 345KV A BUS KVOLTS TC 345KV B BUS KVOLTS MC 345KV B KVOLTS MC 345KV A KVOLTS BU-4550 KVOLTS BU-4551 KVOLTS BRNO #2 7BRNO # BRNO #2 7BRNO # CRC-138KV BUS A VOLTAGE A CRC-138KV BUS B VOLTAGE A PR 138KV SEC 1 KVOLTS PR 138KV SEC 2 KVOLTS Tolerance Band kv kv kv kv kv 2 The target voltage and tolerance band is an hourly average voltage. 3 The primary measurement location should be used for controlling voltage. The backup measurement location should only be used if the primary measurement fails. If the primary measurement fails, however, alternate data source is set up in the EMS so that the primary measurement will automatically point to the backup measurement will be displayed next to the primary voltage measurement if the backup voltage measurement is in use). 4 Ghent 1 regulates voltage on the 138 kv while Ghent #2, 3 and 4 regulate voltage on the 345 kv. This creates a potential operational issue with circulating VARs between units 2, 3 and 4 and Ghent 1. Therefore, to eliminate the circulating VAR issues, the GOP for Ghent plant can choose the target voltage for Ghent 1 as long as they do not violate the tolerance band in Table 1.

6 Voltage and Reactive Power Schedule r10 Notification Requirements The GOP shall notify 5 the TOP of any of the following (without intentional time delay): A generator deviates from its voltage or reactive power schedule 6 A generator s AVR is out of service or a generator is not being operated in automatic voltage control mode for any other reason 7 A status change on the AVR, power system stabilizer, or alternative voltage controlling device 8 A change in reactive capability due to factors other than a status change on the AVR, power system stabilizer, or alternative voltage controlling device 9 When notified by the GOP of any of the factors listed above, the TOP will direct the GOP to either maintain or change its voltage and/or reactive power schedule. Criteria for Exempt Generators Generators with a nameplate rating less than 75 MVA or interconnected at voltages less than 100 kv are exempt from annual VAR testing for MOD-025 per the SERC Regional Criteria: Verification of Generator Real and Reactive Power Capability, Revision 2 October 6, Therefore, AND KU has concluded that generators meeting this criteria are exempt from following a voltage or Reactive Power schedule; thus those generators are exempt from the voltage or Reactive Power schedule specified in this document (including without limitation the obligation to comply with this schedule in automatic voltage control mode and the obligation to maintain or change its voltage schedule or reactive power schedule following the loss of automatic voltage regulator control). Generators that are exempt from the voltage or Reactive Power schedule are not required to make any associated notifications. Units exempt from this voltage schedule are: Unit(s) Exempt Zorn Brown Solar Haefling 5 Notification could be made through verbal or electronic communication 6 VAR R5.2 7 VAR R1 8 VAR R3 9 VAR R4

7 Voltage and Reactive Power Schedule r10 Dix Dam Ohio Falls Cane Run 11 Paddy s Run 11 Paddy s Run 12 Paducah Primary (KMPA CT 1 and 2) Paris (KYMEA)