Rising Electricity Demand and the Challenge of Energy Management in India

Context

• Due to rapid economic activity, increasing urbanization, and changing weather patterns, electricity demand in India is reaching record levels. This year, the country broke all previous electricity consumption records earlier than expected, with peak demand reaching an all-time high of 256.1 gigawatts (GW). Maintaining the stability of the country's power grid and ensuring electricity reaches every household has become a major challenge for the states.

The Complexity of Peak Demand

• Peak Demand : Peak demand is the highest level of electricity consumption on a grid within a specific period of time (usually a 15-minute interval). While this may be a momentary event lasting a few hours, the grid must be prepared to handle this load at all times.
• Seasonal Variation : In summer, the use of air conditioners and coolers from afternoon to night, and in winter, the use of heating devices in the morning and evening, significantly extends the peak hours.
• Infrastructure Dilemma : The entire infrastructure of the power sector (generation, transmission, and distribution) has to be designed to handle this peak load. However, building excessive capacity for only a few hours of peak load is economically disadvantageous, as the infrastructure will remain idle the rest of the time. Conversely, undercapacity can lead to grid failures or load shedding.

States Manage Electricity Demand

Indian states primarily manage electricity for their consumers through two strategies :

• Additionally, states use demand-side management (DSM). Under this, consumers are advised to use electricity judiciously between 6 pm and 11 pm. To address this situation, metropolitan cities like Delhi have increasingly implemented time-of-day (ToD) tariffs (different charges for different times of the day) and smart metering to control demand during peak hours.

What is a time-of-day (ToD) tariff ?

• Time-of-day (ToD) tariff is a modern system for determining electricity rates. Under this system, electricity rates do not remain constant throughout the day, but vary depending on different times of the day. Simply put, "When electricity demand is highest, rates are higher; and when demand is lowest, electricity is cheaper."
• Under time-of-day tariffs, the entire 24 hours are typically divided into three main slots :

1. 1.  Off-Peak Hours (usually nighttime) : During this time, electricity demand is lowest, so electricity rates are significantly cheaper (approximately 10% to 20% lower) than normal.
   2.  Peak Hours (usually evening/nighttime) : During this time, electricity usage in every household and industry is at its peak (e.g., from 6 pm to 10 pm). Electricity rates are most expensive during this time (approximately 10% to 20% higher).
   3.  Normal Hours (daytime) : During this time, electricity rates remain at the normal or base tariff.

Key Emerging Challenges Facing the Power Sector

Electricity demand has increased by a staggering 37% over the past five years (from 183 gigawatts in December 2020 to exceed 250 gigawatts in April 2026). This rapid growth has posed a dual threat to states:

Price Volatility

• When states purchase power from power exchanges outside of long-term agreements, they face extremely high prices. During peak season demand surges, electricity rates on the Indian Energy Exchange sometimes exceed the regulatory ceiling of ₹10 per kilowatt-hour (kWh), placing a significant financial burden on discoms.

Distribution Network Inadequacies

• India has achieved a remarkable increase of 76% in power generation capacity and 47% in transmission lines over the past decade, but the distribution infrastructure that delivers electricity to the last mile has lagged behind.
• Transformer Failure Rate : According to the Central Electricity Authority (CEA), approximately 1.3 million distribution transformers (DTs) fail every year in the country. In states like Kerala, this failure rate is less than 2%, while in some northern states it reaches 20%. This situation is more severe in economically weaker states like Uttar Pradesh and Bihar, which are neither able to purchase expensive electricity from the market nor make large investments to upgrade their infrastructure.

Contribution and Limitations of Renewable Energy (RE)

The role of renewable sources such as solar, wind, and hydropower in managing peak demand is increasing due to their significantly lower operating costs. However, the impact varies across different states in India:

• Positive synergy (daytime) : States like Gujarat and Karnataka can easily meet their agricultural and commercial demand through daytime solar energy. Tamil Nadu needs solar power during the monsoon months.
• The Sunset Challenge : The biggest limitation of solar energy is that solar production drops to zero after sunset, when household electricity demand is highest (evening peak hours).
• Low-potential states : States like Punjab, where renewable capacity is low and electricity demand peaks in summer due to paddy sowing, are forced to rely entirely on hydropower imports from outside states and expensive short-term markets.

The Way Forward: Making the Grid Smart and Resilient

The challenge now is not just generating more electricity, but also efficiently managing the generated electricity. To secure future needs, the following steps are essential:

• Energy Storage Technologies : Investment in pumped hydro storage (PHS) and battery energy storage systems (BESS) must be increased to balance the grid. States like Maharashtra, Andhra Pradesh, and Tamil Nadu are working to utilize excess daytime renewable energy during peak hours at night.
• Smart grid and infrastructure upgrades : Advanced maintenance and network modernization are essential to reduce the failure rate of distribution transformers.
• Strict demand-side policies : Load shifting and strict enforcement of commercial time-of-day tariffs across the country are essential to encourage consumers to shift from peak to non-peak hours.

Conclusion

• India's energy security will depend on how quickly we can establish a strong and resilient balance between our traditional coal-fired power plants, variable renewable energy, and modern storage systems.