<?xml version="1.0" encoding="UTF-8"?>
<!--CIMG V1.1 (21-04-2026)-->
<xbrli:xbrl xmlns:in-capmkt="http://www.sebi.gov.in/xbrl/2025-11-30/in-capmkt" xmlns:in-capmkt-ent="http://www.sebi.gov.in/xbrl/Changes_In_Management/2025-11-30/in-capmkt/in-capmkt-ent" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:in-capmkt-types="http://www.sebi.gov.in/xbrl/2025-11-30/in-capmkt-types" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:net="http://www.xbrl.org/2009/role/net" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:iso4217="http://www.xbrl.org/2003/iso4217" xmlns:negated="http://www.xbrl.org/2009/role/negated" xmlns:xbrldi="http://xbrl.org/2006/xbrldi" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xl="http://www.w3.org/1999/xlink"><link:schemaRef xlink:type="simple" xlink:href="in-capmkt-ent-2025-11-30.xsd"/><xbrli:context id="MainD"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532898</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-06-11</xbrli:startDate><xbrli:endDate>2026-06-11</xbrli:endDate></xbrli:period></xbrli:context><xbrli:context id="MainI"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532898</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-06-11</xbrli:instant></xbrli:period></xbrli:context><xbrli:context id="I_ChangeInManagement1"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532898</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-06-11</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ChangeInManagementAxis"><in-capmkt:ChangeInManagementDomain>ChangeInManagementDomain1</in-capmkt:ChangeInManagementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="D_ChangeInManagement1"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532898</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-06-11</xbrli:startDate><xbrli:endDate>2026-06-11</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ChangeInManagementAxis"><in-capmkt:ChangeInManagementDomain>ChangeInManagementDomain1</in-capmkt:ChangeInManagementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_ChangeInManagement2"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532898</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-06-11</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ChangeInManagementAxis"><in-capmkt:ChangeInManagementDomain>ChangeInManagementDomain2</in-capmkt:ChangeInManagementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="D_ChangeInManagement2"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532898</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-06-11</xbrli:startDate><xbrli:endDate>2026-06-11</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ChangeInManagementAxis"><in-capmkt:ChangeInManagementDomain>ChangeInManagementDomain2</in-capmkt:ChangeInManagementDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="I_ResignationOfDirector1"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532898</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:instant>2026-06-11</xbrli:instant></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ResignationOfDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficerAxis"><in-capmkt:ResignationOfDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficerDomain>ResignationOfDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficerDomain1</in-capmkt:ResignationOfDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficerDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:context id="D_ResignationOfDirector1"><xbrli:entity><xbrli:identifier scheme="https://www.sebi.gov.in/in-capmkt/ScripCode">532898</xbrli:identifier></xbrli:entity><xbrli:period><xbrli:startDate>2026-06-11</xbrli:startDate><xbrli:endDate>2026-06-11</xbrli:endDate></xbrli:period><xbrli:scenario><xbrldi:typedMember dimension="in-capmkt:ResignationOfDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficerAxis"><in-capmkt:ResignationOfDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficerDomain>ResignationOfDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficerDomain1</in-capmkt:ResignationOfDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficerDomain></xbrldi:typedMember></xbrli:scenario></xbrli:context><xbrli:unit id="pure"><xbrli:measure>xbrli:pure</xbrli:measure></xbrli:unit><in-capmkt:NSESymbol contextRef="MainI">POWERGRID</in-capmkt:NSESymbol><in-capmkt:NameOfTheCompany contextRef="MainI">Power Grid Corporation of India Limited</in-capmkt:NameOfTheCompany><in-capmkt:ScripCode contextRef="MainI">532898</in-capmkt:ScripCode><in-capmkt:MSEISymbol contextRef="MainI">NOTLISTED</in-capmkt:MSEISymbol><in-capmkt:ISIN contextRef="MainI">INE752E01010</in-capmkt:ISIN><in-capmkt:WhetherDisclosureFiledForListedEntity contextRef="MainD">true</in-capmkt:WhetherDisclosureFiledForListedEntity><in-capmkt:RelationshipWithTheListedEntity contextRef="MainD">Listed Entity (self)</in-capmkt:RelationshipWithTheListedEntity><in-capmkt:WhetherEventOrInformationIsAnOutcomeOfBoardMeeting contextRef="MainD">true</in-capmkt:WhetherEventOrInformationIsAnOutcomeOfBoardMeeting><in-capmkt:DateOfBoardMeeting contextRef="MainD">2026-06-10</in-capmkt:DateOfBoardMeeting><in-capmkt:StartTimeOfBoardMeeting contextRef="MainD">17:15:00</in-capmkt:StartTimeOfBoardMeeting><in-capmkt:EndTimeOfBoardMeeting contextRef="MainD">18:20:00</in-capmkt:EndTimeOfBoardMeeting><in-capmkt:NumberOfPersonsOrEntitiesForWhomChangeIsBeingReported contextRef="MainI" unitRef="pure" decimals="0">2</in-capmkt:NumberOfPersonsOrEntitiesForWhomChangeIsBeingReported><in-capmkt:DateOfReport contextRef="MainI">2026-06-11</in-capmkt:DateOfReport><in-capmkt:TypeOfChange contextRef="D_ChangeInManagement1">Cessation</in-capmkt:TypeOfChange><in-capmkt:CategoryOfCessation contextRef="D_ChangeInManagement1">Resignation</in-capmkt:CategoryOfCessation><in-capmkt:CategoryForChange contextRef="D_ChangeInManagement1">Key Managerial Personnel</in-capmkt:CategoryForChange><in-capmkt:DesignationOfDesignatedPerson contextRef="D_ChangeInManagement1">Company Secretary</in-capmkt:DesignationOfDesignatedPerson><in-capmkt:SalutationOfDesignatedPerson contextRef="D_ChangeInManagement1">Mr.</in-capmkt:SalutationOfDesignatedPerson><in-capmkt:NameOfDesignatedPerson contextRef="I_ChangeInManagement1">Satyaprakash Dash</in-capmkt:NameOfDesignatedPerson><in-capmkt:EffectiveDateOfReasonOfChange contextRef="I_ChangeInManagement1">2026-06-10</in-capmkt:EffectiveDateOfReasonOfChange><in-capmkt:WhetherTheFurtherDisclosureForResignationOfStatutoryAuditorOrDirectorOrKMPsOrSMPOrComplianceOfficerIsToBeFiledAlongWithThisDisclosure contextRef="D_ChangeInManagement1">true</in-capmkt:WhetherTheFurtherDisclosureForResignationOfStatutoryAuditorOrDirectorOrKMPsOrSMPOrComplianceOfficerIsToBeFiledAlongWithThisDisclosure><in-capmkt:TypeOfChange contextRef="D_ChangeInManagement2">Appointment</in-capmkt:TypeOfChange><in-capmkt:CategoryForChange contextRef="D_ChangeInManagement2">Key Managerial Personnel</in-capmkt:CategoryForChange><in-capmkt:DesignationOfDesignatedPerson contextRef="D_ChangeInManagement2">Company Secretary</in-capmkt:DesignationOfDesignatedPerson><in-capmkt:SalutationOfDesignatedPerson contextRef="D_ChangeInManagement2">Mrs.</in-capmkt:SalutationOfDesignatedPerson><in-capmkt:NameOfDesignatedPerson contextRef="I_ChangeInManagement2">Anjana Luthra</in-capmkt:NameOfDesignatedPerson><in-capmkt:EffectiveDateOfReasonOfChange contextRef="I_ChangeInManagement2">2026-06-10</in-capmkt:EffectiveDateOfReasonOfChange><in-capmkt:TermOfAppointmentInMonths contextRef="D_ChangeInManagement2" unitRef="pure" decimals="INF">144</in-capmkt:TermOfAppointmentInMonths><in-capmkt:BriefProfile contextRef="D_ChangeInManagement2">Smt. Anjana Luthra (aged 48 years) is a Fellow Member of the Institute of Company Secretaries of India (ICSI). She holds a B.Com. (Hons.) degree and Bachelor of Laws (LL.B.) degree from the University of Delhi. Smt. Anjana Luthra has over 25 years of diverse experience across corporate secretarial, legal, finance, and compliance functions. Her expertise spans corporate governance, statutory and regulatory compliance, formation of new ventures, mergers and acquisitions, investor relations, regulatory liaison, financial planning, fund management, taxation, structuring of commercial contracts, loan and transaction-specific agreements, intellectual property rights and litigation. During her tenure at POWERGRID, she contributed to several key assignments including FPO and initiatives that earned the organisation prestigious accolades for Corporate Governance. Also, as Company Secretary and Compliance Officer of POWERGRID Infrastructure Investment Trust (PGInvIT), the first InvIT sponsored by a Maharatna CPSE, she played a pivotal role in its successful launch, IPO and post-listing compliance and governance requirements</in-capmkt:BriefProfile><in-capmkt:Salutation contextRef="D_ResignationOfDirector1">Mr.</in-capmkt:Salutation><in-capmkt:NameOfTheDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficer contextRef="D_ResignationOfDirector1">Satyaprakash Dash</in-capmkt:NameOfTheDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficer><in-capmkt:DesignationOfDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficer contextRef="D_ResignationOfDirector1">Company Secretary</in-capmkt:DesignationOfDirectorOrKeyManagerialPersonnelOrSeniorManagementPersonnelOrComplianceOfficer><in-capmkt:DateOnWhichTheResignationLetterWasReceived contextRef="D_ResignationOfDirector1">2026-06-10</in-capmkt:DateOnWhichTheResignationLetterWasReceived><in-capmkt:EffectiveDateOfResignation contextRef="I_ResignationOfDirector1">2026-06-10</in-capmkt:EffectiveDateOfResignation><in-capmkt:WhetherTheLetterOfResignationHasTheDetailedReasonForResignation contextRef="I_ResignationOfDirector1">true</in-capmkt:WhetherTheLetterOfResignationHasTheDetailedReasonForResignation><in-capmkt:ReasonOfResignationInBrief contextRef="D_ResignationOfDirector1">due to other assignments in Finance Department.</in-capmkt:ReasonOfResignationInBrief></xbrli:xbrl>
