The South Korean government's commitment to expanding renewable energy is clear. The ambitious goal of reaching 100GW by 2030 reflects a determination to accelerate the energy transition. However, the term "ambitious" implies that achieving this target will not be easy. Increasing the share of renewable energy complicates the balance of supply and demand in the power grid, particularly as it interacts with the rigid nature of nuclear power.
As the process of expanding renewable energy continues, the number of electricity providers is steadily increasing, with new players entering the market. Their entry will lead to overlapping interests and roles within the existing market and system, sometimes resulting in conflicts that will heighten the demand for changes in the electricity market. It is no longer sufficient to simply increase the quantity of generation facilities; solutions are needed for how to accommodate and manage them. The bottleneck in the energy transition must be addressed through both technology and regulation.
A key challenge is enhancing grid flexibility. Coincidentally, both renewable energy and nuclear power, which are carbon-free sources, have limitations in adjusting output. Ultimately, flexibility in this era must be secured from the demand side. While batteries are often mentioned as a solution, they alone are not sufficient. There are economic constraints, and to respond to long-term and large-scale variability, complementary measures are necessary. The future power system must be designed to allow demand to adjust according to grid conditions, rather than simply having supply follow demand.
In this process, we also face the challenge of electrifying sectors that currently use fossil fuels as their final energy source. Notable examples include electric vehicles in the transportation sector and heat pumps in the heating sector. Electric vehicles can contribute to grid operation by adjusting charging times or distributing demand according to grid conditions. Similarly, heat pumps can become flexible demand resources that adjust their operation based on grid conditions when combined with a certain scale of thermal storage facilities. They can increase charging and heat storage during surplus electricity periods and reduce usage during shortages.
This approach of absorbing excess electricity from the power sector into other sectors like transportation and heating is known as "sector coupling." The relevant technologies are already largely prepared. The issue lies in the lack of a market and regulatory framework to effectively utilize them. For distributed consumer assets to become meaningful flexible resources, there needs to be a mechanism to aggregate them and provide their value to the grid in monetary terms. However, the current regulatory framework does not adequately support this function. With new types of market participants and technologies emerging, there is an urgent need to establish governance to coordinate these changes.
Equally important as technical solutions is the establishment of rules, specifically the advancement of grid technology standards. These standards must address two simultaneous challenges. One is long-term directionality: institutionally supporting a transition path where the share of renewable energy continues to grow while existing fossil fuel generation is gradually reduced.
The other is short-term operational stability: managing the grid to prevent immediate issues during the transition process. Well-designed technical standards can meet both challenges simultaneously. They should not be mechanisms to maintain a generator-centric grid but rather a roadmap for a stable transition to a renewable energy-centric grid.
For all these technical and regulatory improvements to function, a fundamental overhaul of governance is necessary. The flexibility created by existing methods, electrification, and sector coupling must operate together within a single system. In this process, technology-neutral judgments that do not favor specific technologies or businesses are essential. The interests of market participants can vary significantly depending on which resources are compensated and how output control and demand adjustments are managed. Fair coordination functions are also crucial.
The discussions surrounding the establishment of the Electricity Regulatory Commission are significant in this context. Beyond being a simple regulatory body, it needs to act as a "referee" that ensures the efficient operation of a renewable energy-centric grid and fairly mediates conflicting interests. At the same time, it must serve as a "helmsman" guiding the entire system toward carbon neutrality.
The energy transition is not merely about replacing power sources. It signifies a fundamental transformation in how electricity is produced and consumed, as well as the regulations governing it. In the face of rapid electrification, stable operation of the power grid is directly linked to national economic and industrial competitiveness. It is now essential to design a new energy system where technological and regulatory innovations are aligned.
* This article has been translated by AI.
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