1. Introduction

Electricity systems require a continuous balance between generation and consumption. Unlike most commodities, electricity generally cannot be stored economically at the scale required to manage the entire grid. Therefore, the amount of electricity injected into the grid must remain closely aligned with the amount withdrawn at every moment.

A balancing and settlement system provides the legal, institutional and financial framework for dealing with this problem. It determines:

who is responsible for maintaining balance;

how deviations from scheduled generation or consumption are measured;

who operates the balancing mechanism;

how balancing energy or ancillary services are procured;

how imbalance charges are calculated;

how financial settlement takes place;

how persistent deviations are controlled; and

how the system protects grid reliability, transparency and market integrity.

In India, the governance of balancing and settlement has developed from the Availability Based Tariff (ABT) and Unscheduled Interchange (UI) mechanism into the modern Deviation Settlement Mechanism (DSM) framework. The Central Electricity Regulatory Commission (CERC) currently lists the CERC (Deviation Settlement Mechanism and Related Matters) Regulations, 2024, together with amendments through 2026. (CERC)

2. Meaning of Balancing and Settlement

A. Balancing

Balancing is the operational process through which the electricity system operator maintains equilibrium between:

Generation + imports = demand + exports + system losses

If demand unexpectedly increases, the system needs additional generation or reduced consumption. If generation exceeds demand, generation may have to be reduced or additional demand/storage activated.

Balancing therefore operates at several timescales:

Day-ahead balancing

Intraday balancing

Real-time balancing

Automatic frequency restoration

Manual balancing

Emergency balancing

The increasing penetration of solar and wind makes balancing governance particularly important because renewable output can vary rapidly and forecasting is imperfect.

B. Settlement

Settlement is the financial and accounting process following physical electricity delivery.

For example:

Generator schedules 100 MWh.

Actual generation = 95 MWh.

Deviation = –5 MWh.

The settlement mechanism determines the financial consequences of that 5 MWh deviation.

Thus, balancing is primarily operational, whereas settlement is primarily commercial and financial.

3. Legal Foundations in India

The Indian framework rests principally on the Electricity Act, 2003.

Important provisions include:

Section 28

The National Load Despatch Centre and Regional Load Despatch Centres perform system-operation functions. Load despatch institutions are central to scheduling, dispatch and grid security.

Section 29

The Regional Load Despatch Centre is responsible for optimum scheduling and dispatch of electricity within its region in accordance with the Grid Code.

Section 32

The State Load Despatch Centre performs similar functions at the State level.

Section 79

CERC has important regulatory functions concerning inter-State electricity transmission and the national-level grid framework. Section 79(1)(h), in particular, empowers CERC to specify the Grid Code having regard to the Grid Standards.

The Supreme Court has specifically recognised this regulatory foundation in relation to ABT and UI mechanisms. (Indian Kanoon)

4. Evolution from ABT to DSM

The Indian balancing system has undergone several stages.

Stage I – Traditional tariff system

Initially, electricity tariffs largely focused on the energy supplied and capacity made available.

There was comparatively less emphasis on real-time deviation discipline.

Stage II – Availability Based Tariff

ABT introduced a more sophisticated framework consisting broadly of:

capacity charges;

energy charges; and

Unscheduled Interchange charges.

The objective was to separate availability, scheduled energy and deviation.

Stage III – UI mechanism

UI charges financially recognised deviations between scheduled and actual injection/drawal.

The Supreme Court explained that UI charges were connected with deviations and grid frequency and were designed to promote grid discipline. (Indian Kanoon)

Stage IV – Deviation Settlement Mechanism

The UI terminology was subsequently replaced by the Deviation Settlement Mechanism.

CERC's 2024 DSM Regulations expressly establish a framework for treatment and settlement of deviations from scheduled injection or drawal in the interests of reliability, security and stability of the grid. (CERC)

The framework remains subject to continuing regulatory development; CERC's current regulations page records amendments to the 2024 DSM Regulations, including a third amendment notified in September 2026. (CERC)

5. Institutional Governance

A balancing and settlement system requires several institutions.

The governance model therefore combines regulation, system operation and market settlement.

6. Scheduling as the Foundation of Settlement

A balancing mechanism cannot operate without a reliable schedule.

A schedule establishes the quantity of electricity that an entity is expected to inject or draw during a specified time block.

The basic concept is:

Deviation = Actual Injection/Drawal – Scheduled Injection/Drawal

The settlement system then applies the legally prescribed rate or methodology to the deviation.

This creates an important governance principle:

Participants must have predictable scheduling rules before they can be held financially responsible for deviations.

7. Deviation Settlement Mechanism

The DSM essentially creates financial consequences for deviation from the approved schedule.

For example:

Scheduled generation: 500 MW
Actual generation: 470 MW
Deviation: –30 MW

If the applicable DSM rate is ₹X/MWh, the financial settlement is determined according to the applicable regulatory formula.

The exact rate is not simply a contractual price. It is determined under the applicable regulatory framework.

Historically, UI rates were linked to grid frequency because deviations could either assist or adversely affect system frequency. Earlier CERC regulations expressly linked deviation charges to frequency and market prices. (Indian Kanoon)

The contemporary DSM framework has moved toward a more sophisticated approach reflecting system conditions and market realities.

8. Balancing Responsibility

A fundamental principle of modern electricity governance is Balance Responsibility.

A market participant should generally be responsible for managing the difference between its expected and actual position.

This encourages:

accurate forecasting;

efficient scheduling;

flexible generation;

demand response;

battery storage;

improved renewable forecasting;

reduced gaming;

responsible market participation.

For renewable generators, however, governance must recognise that forecasting uncertainty is structurally different from deliberate commercial deviation.

Consequently, Indian regulations have developed specific provisions for renewable-energy deviations.

CERC has also separately undertaken regulatory work concerning the value used for calculating deviations for wind and solar sellers from April 2026. (CERC)

9. Ancillary Services and Balancing

Balancing is not limited to financial penalties for deviations.

A sophisticated electricity system also requires ancillary services, including:

frequency control;

automatic generation control;

reserve capacity;

restoration reserves;

voltage support;

black-start capability.

The purpose is to obtain physical resources that can respond when the system moves away from balance.

Therefore, good governance should distinguish:

Deviation settlement → financial/accounting mechanism

from

Ancillary services → physical balancing mechanism

The two systems complement each other.

10. Governance of Renewable Energy

Variable renewable energy creates a major challenge for balancing systems.

Solar and wind generation can deviate from forecasts because of:

cloud cover;

wind-speed changes;

forecasting errors;

equipment outages;

transmission constraints.

Consequently, governance must balance two competing objectives:

Objective 1 – Grid discipline

Generators should have incentives to forecast accurately.

Objective 2 – Energy transition

The regulatory framework should not make renewable participation economically impracticable merely because renewable resources have inherent variability.

CERC has historically developed specific forecasting, scheduling and imbalance-handling frameworks for wind and solar generation. (CERC)

This illustrates an important principle of energy law:

Balancing regulation must internalise the cost of uncertainty without treating unavoidable physical variability as equivalent to deliberate non-compliance.

11. Financial Settlement and Pooling

A settlement system generally requires a central accounting mechanism.

Participants' deviations are calculated for each applicable time block and corresponding charges or payments are credited or debited through the relevant settlement pool.

The legal importance of the settlement pool is substantial because it determines:

who pays;

who receives payment;

when payment becomes due;

treatment of delayed payment;

treatment of surplus/deficit;

recovery of outstanding amounts;

consequences of persistent default.

CERC continues to issue orders concerning recovery of amounts and persistent defaults under the DSM framework. (CERC)

12. Grid Discipline versus Penalty

One of the most important legal questions is whether deviation charges constitute a penalty.

The Supreme Court addressed this directly in:

Central Power Distribution Co. v. Central Electricity Regulatory Commission, (2007) 8 SCC 197

The dispute concerned CERC's application of ABT and UI charges to NTPC's Simhadri generating station. (Indian Kanoon)

The Court upheld the regulatory basis for the ABT/UI mechanism and recognised that UI charges form part of the mechanism for maintaining grid discipline under the Electricity Act.

The Court's reasoning is particularly important because it treated UI charges as a commercial mechanism for grid discipline, rather than simply a punitive sanction. (Indian Kanoon)

Legal significance

This case establishes that:

CERC possesses regulatory authority over the inter-State grid framework;

scheduling and dispatch are legitimate objects of regulation;

deviation mechanisms can be designed to promote grid discipline;

balancing mechanisms need not be characterised simply as conventional penalties.

This remains one of the foundational Indian cases for understanding settlement governance.

13. Case Law: Central Power Distribution Co. v. CERC

The Supreme Court considered whether CERC had jurisdiction to impose ABT/UI arrangements even though UI charges were not simply another conventional tariff component.

The Court connected CERC's authority with:

Section 79(1)(h);

Grid Code regulation;

grid security;

scheduling;

dispatch; and

maintenance of grid discipline.

The judgment therefore provides an important constitutional-administrative principle:

Regulatory authority over electricity systems includes authority to establish operational and commercial mechanisms necessary for effective grid governance, where authorised by the Electricity Act.

(Indian Kanoon)

14. Case Law: Power Grid Corporation of India Ltd. v. Chhattisgarh State Electricity Regulatory Commission

Another important decision concerns the legal nature of electricity flowing through the balancing mechanism.

The case examined whether electricity transferred through the UI mechanism could be treated as a conventional sale or purchase by the transmission/system operator.

The court's discussion recognised that electricity accounting under the UI mechanism represents settlement among the relevant participants and does not necessarily constitute an ordinary commercial sale by the transmission operator. (Indian Kanoon)

Significance

This distinction is important because:

Physical balancing ≠ ordinary bilateral electricity sale.

The balancing system can therefore operate as a regulatory mechanism for maintaining system equilibrium without converting every balancing transaction into an ordinary power-sale transaction.

15. Case Law: Indo Rama Synthetics v. Maharashtra Electricity Regulatory Commission

In Indo Rama Synthetics (I) Ltd. v. Maharashtra Electricity Regulatory Commission, APTEL considered issues concerning inadvertent injection of electricity and Maharashtra's Final Balancing and Settlement Code. (vLex)

The case illustrates that balancing and settlement rules also operate at the State level, particularly for open-access consumers and captive generation.

Its importance lies in demonstrating that:

balancing codes can determine treatment of inadvertent energy;

regulatory settlement rules may govern electricity injected without a corresponding commercial schedule;

the legal framework must distinguish contractual rights from regulatory settlement obligations.

16. Case Law: Sitapuram Power Ltd. v. Transmission Corporation of Andhra Pradesh

In Sitapuram Power Ltd. v. Transmission Corporation of Andhra Pradesh, APTEL considered Andhra Pradesh's Interim Balancing and Settlement Code for open-access users. (Indian Kanoon)

The case involved the practical implementation of scheduling and settlement for open-access consumers.

A later proceeding concerning Sitapuram also emphasised that difficulties in implementing the balancing and settlement framework could require regulatory intervention by the State Commission. (Indian Kanoon)

Legal significance

This demonstrates that balancing governance must include mechanisms for:

resolving implementation difficulties;

correcting regulatory gaps;

protecting legitimate open-access rights;

ensuring that distribution licensees do not use settlement arrangements to frustrate statutory open access.

17. Final Balancing and Settlement Mechanisms

State-level balancing mechanisms may contain rules governing:

deviation between scheduled and actual energy;

inadvertent energy;

open-access consumers;

captive generators;

transmission losses;

settlement rates;

banking arrangements;

surplus/deficit energy.

For example, Maharashtra has operated a Final Balancing and Settlement Mechanism (FBSM) framework. Recent electricity litigation continues to refer to FBSM rates when determining contractual treatment of deviations. (Indian Kanoon)

Thus, India's balancing governance has both:

inter-State DSM, and
State-level balancing/settlement frameworks.

18. Governance Principles

An effective balancing and settlement system should satisfy several principles.

1. Reliability

The first objective must be secure and reliable electricity supply.

2. Transparency

Participants should be able to understand:

schedules;

deviation calculations;

settlement rates;

invoices;

payment obligations.

3. Predictability

Rules should not change unpredictably after electricity has already been delivered.

4. Cost causation

Entities causing balancing costs should, as far as practicable, bear appropriate financial responsibility.

5. Non-discrimination

Similarly situated participants should be governed by consistent rules.

6. Regulatory independence

Settlement rules should be determined through legally authorised regulatory institutions rather than ad hoc commercial intervention.

7. Proportionality

Deviation charges should distinguish between:

minor unavoidable deviations;

forecasting uncertainty;

technical failures;

deliberate gaming;

excessive deviations during stressed grid conditions.

19. Balancing Governance and Electricity Market Design

Balancing and settlement are closely connected to market design.

A modern electricity market generally has:

Day-Ahead Market → Real-Time Market → Balancing Mechanism → Settlement

A participant may initially purchase or sell electricity in the day-ahead market but subsequently find that its actual position differs.

The balancing system then becomes the mechanism through which the difference is resolved.

This is particularly important as India develops shorter scheduling and real-time market arrangements. CERC has also published a staff paper concerning shortening scheduling timelines for the Real Time Market. (CERC)

20. Balancing in an Energy-Storage System

Battery energy storage can fundamentally change balancing governance.

A battery can:

absorb excess generation;

inject electricity during shortages;

provide frequency response;

participate in ancillary services;

reduce renewable curtailment.

Consequently, future settlement rules must determine:

whether storage is treated as generation, demand or both;

how charging and discharging deviations are calculated;

who owns balancing responsibility;

how storage participates in ancillary-service markets;

how state-of-charge constraints are recognised.

The regulatory architecture therefore needs to evolve from a traditional generator-consumer model toward a multi-resource balancing system.

21. Digitalisation and Automated Settlement

Modern balancing systems increasingly rely on:

smart meters;

automated generation control;

SCADA;

artificial intelligence forecasting;

digital energy accounting;

automated settlement platforms.

This creates additional legal issues concerning:

data accuracy;

cybersecurity;

algorithmic transparency;

correction of metering errors;

auditability;

responsibility for automated decisions.

The settlement system must therefore maintain a legally defensible chain of evidence from physical electricity measurement to financial invoice.

22. Dispute Resolution

A robust governance framework requires an institutional dispute-resolution pathway.

Disputes may concern:

meter readings;

schedules;

revised schedules;

deviation quantities;

settlement rates;

payment defaults;

force majeure;

transmission constraints;

curtailment;

erroneous accounting.

Depending on the jurisdiction and issue, disputes may reach:

Load Despatch Centre;

CERC/SERC;

Appellate Tribunal for Electricity;

High Court;

Supreme Court.

The existence of such review mechanisms is important because settlement decisions can have substantial financial consequences.

23. Major Legal Challenges

A. Renewable intermittency

Rigid deviation rules may create excessive exposure for renewable generators.

B. Forecasting uncertainty

Forecast errors cannot always be eliminated.

C. Market manipulation

Participants may intentionally deviate when settlement prices create profitable opportunities.

D. Transmission congestion

A participant may technically comply with its schedule while network constraints prevent the expected physical flow.

E. Payment default

Persistent non-payment can threaten the financial integrity of the balancing pool.

F. Federal regulatory overlap

India's electricity sector involves both Central and State institutions, creating potential jurisdictional questions.

G. Real-time complexity

As electricity markets move closer to real-time settlement, legal rules must become sufficiently rapid without sacrificing due process.

24. Future Governance Model

The future balancing and settlement architecture is likely to involve:

Forecasting → Scheduling → Market Clearing → Real-Time Dispatch → Automated Balancing → Metering → Deviation Calculation → Settlement → Audit

The system will increasingly integrate:

renewable energy;

battery storage;

demand response;

electric vehicles;

distributed energy resources;

virtual power plants;

prosumers;

AI-based forecasting;

automated demand management.

This means balancing regulation will increasingly become a form of real-time infrastructure governance rather than merely a billing mechanism.

25. Conclusion

Governance of balancing and settlement systems is a fundamental component of modern electricity law. It connects physical grid operation with commercial accountability.

India's legal evolution from ABT and UI to DSM demonstrates the transformation of electricity regulation from conventional tariff control toward sophisticated real-time system governance. CERC's current DSM framework continues to evolve, with amendments to the 2024 Regulations recorded through September 2026. (CERC)

The central legal principle emerging from the case law is that balancing and deviation mechanisms are legitimate instruments of electricity-system governance when grounded in statutory regulatory authority. In Central Power Distribution Co. v. CERC, the Supreme Court recognised ABT/UI as an essential mechanism for maintaining grid discipline. (Indian Kanoon)

Future balancing law will have to reconcile grid reliability, market efficiency, renewable integration, consumer protection, storage, real-time markets and digitalisation. The strongest legal framework will therefore be one that combines accurate measurement, transparent settlement, fair allocation of balancing costs, effective system-operation authority and meaningful avenues for regulatory review.