Debate Over ISTS Connectivity – Balancing Grid Efficiency and Renewable Energy Growth

Debate Over ISTS Connectivity Rules - Balancing Grid Efficiency and Renewable Energy Growth

ISTS Connectivity Latest News

  • India’s renewable energy sector (private developers, Renewable Energy Implementing Agencies (REIAs), industry bodies) has raised strong objections to a proposed regulatory framework by the Central Electricity Regulatory Commission (CERC).
  • The proposed framework could lead to the forfeiture of Inter-State Transmission System (ISTS) connectivity if developers fail to execute long-term Power Purchase Agreements (PPAs) within a stipulated time.
  • The issue is significant in the context of India’s ambitious target of 500 GW of non-fossil fuel capacity by 2030 and ongoing challenges of grid congestion, transmission bottlenecks, and delays in project execution.

Background

  • Existing framework:
    • Under General Network Access (GNA) regulations, renewable projects can secure connectivity through Letters of Award (LoAs), signed PPAs, partial land acquisition, bank guarantees in lieu of land documents.
    • This flexibility aimed to facilitate early-stage project development.
  • How the current model works:
    • REIAs like SECI, NTPC, NHPC, and SJVN act as intermediary procurers - buy power from developers via PPAs, sell to discoms through Power Sale Agreements (PSAs).
    • Typically, PPAs are signed only after PSAs, making early PPA linkage difficult.
  • CERC’s proposal:
    • PPA-linked connectivity: Grant future transmission connectivity only against signed PPAs, not LoAs.
    • Auction-based allocation: Introduce auctions for allocating connectivity, along with firm commissioning timelines.
  • Rationale behind these proposals
    • Address underutilisation of transmission infrastructure. 
    • Nearly 31.8 GW of renewable capacity already has connectivity but lacks PPAs. 
    • Around 42 GW of RE capacity remains without PPAs, making PPA delays a systemic bottleneck (ICRA).

Key Concerns Raised by the Renewable Energy Sector

  • Penalising developers for factors beyond control:
    • Industry associations argue that PPA delays are largely due to procedural inefficiencies and slow tariff approvals by state-owned DISCOMs, not developer inaction.
    • Penalising developers undermines the principle of regulatory certainty.
  • Impact on India’s clean energy targets:
    • The proposed measures could slow capacity addition, threatening the 2030 non-fossil energy target.
    • Despite rapid renewable growth, transmission infrastructure (495,000 circuit-km grid) has struggled to keep pace.
  • Risk of higher tariffs and market concentration:
    • The National Solar Energy Federation of India (NSEFI) opposed auctioning grid connectivity at a premium, warning it would - 
      • Increase renewable energy tariffs.
      • Favour large, cash-rich players, marginalising smaller developers.
    • Grid connectivity, they argued, should not become a tradable asset.

Sector-Specific Issues

  • Solar energy sector: Emphasised that delays stem from state-level regulatory and approval bottlenecks. Warned against market distortion through premium-based auctions.
  • Wind energy sector: 
    • Wind associations termed proposed timelines unrealistic, citing long manufacturing cycles, import dependence for turbines and key components.
    • Opposed the 18-month project completion deadline, seeking a 24–30 month timeframe.

SECI’s (Solar Energy Corporation of India) Position

  • Warned that auctioning connectivity would push up future tariffs.
  • Recommended reallocation based on project readiness, such as land acquisition, financial closure, and equipment procurement.
  • This approach prioritises execution capability over bidding power.

Challenges and Way Ahead

  • Transmission bottlenecks and idle capacity: Accelerated transmission infrastructure development - Proactive expansion of ISTS to match renewable ambitions.
  • Delayed PPAs: Due to DISCOM inefficiencies. Reform DISCOM processes - Time-bound tariff approvals and PPA execution, strengthening financial health of DISCOMs.
  • Mismatch between generation growth and grid expansion: Flexible, technology-specific timelines - Differentiated norms for solar, wind, and hybrid projects.
  • Risk of policy uncertainty and investor confidence erosion: Integrated policy coordination - Closer coordination between CERC, Ministry of Power, and MNRE, align transmission planning with renewable capacity addition.
  • Potential monopolisation of grid access: Non-market-based allocation of connectivity - Prioritise project readiness and execution milestones, avoid auctioning connectivity as a revenue-maximising tool.

Conclusion

  • The controversy over ISTS connectivity rules highlights the broader tension between grid efficiency and renewable energy expansion. 
  • While addressing idle transmission capacity is necessary, punitive measures risk undermining investor confidence and slowing India’s clean energy transition. 
  • A coordinated, flexible, and developer-sensitive regulatory approach, focused on structural reforms rather than penalties, is essential to achieve India’s renewable energy and climate commitments.

Source: IE

ISTS Connectivity FAQs

Q1: What is the rationale behind CERC’s proposal to lapse ISTS connectivity for renewable projects without PPAs?

Ans: To prevent blocking of transmission bays by over 45 GW of idle renewable capacity holding grid connectivity without signed PPAs.

Q2: How could CERC’s proposed ISTS connectivity rules impact India’s renewable energy goals?

Ans: By slowing project execution and undermining the target of 500 GW non-fossil capacity by 2030 due to regulatory uncertainty.

Q3: Why do renewable energy developers oppose auctioning of vacated ISTS connectivity?

Ans: Because it could raise tariffs, favour cash-rich players, and convert grid access into a tradable asset.

Q4: What role do state DISCOMs play in delaying renewable energy projects?

Ans: Procedural delays and slow tariff approvals by DISCOMs are the primary cause of delayed PPA execution.

Q5: Why does the wind energy sector seek longer project completion timelines?

Ans: Due to long manufacturing cycles and import dependence for turbines.

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