What types of power equipment are found in a substation, and what are their respective functions?

Substations are critical components of the power system, responsible for transforming, distributing, and controlling electrical energy.

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2024/03/07

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Challenges in the Electricity Market under a High Share of New Energy

Despite their clear advantages in low-carbon, environmentally friendly, and clean energy production, new energy sources—due to their uneven spatial output distribution and temporal mismatches between supply and demand—can give rise to a host of challenges in existing electricity market mechanisms, including price disappearance, price erosion, low efficiency in the utilization of distributed generation and storage, and poor interaction among demand-side resources.

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2024/03/02

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What is the operating principle of a transformer?

The operating principle of a transformer is based on electromagnetic induction: when an alternating current is passed through the primary winding, it generates a time-varying magnetic field in the transformer’s iron core, which in turn induces an electromotive force in the secondary winding, thereby achieving voltage transformation. In this way, electrical appliances designed for different voltage levels can be adjusted to the appropriate voltage via a transformer and operate together seamlessly.

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2024/02/22

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What kind of electricity market do we need under a high share of new energy?

In recent years, China has steadily intensified its efforts to develop new energy sources, actively aligning with the global Sustainable Development Goals and the dual carbon targets of peaking carbon emissions and achieving carbon neutrality. By the end of 2022, China’s installed capacity of renewable energy had reached 1.21 billion kilowatts, accounting for 47.3% of the country’s total power generation capacity. According to projections, under the assumption of achieving carbon neutrality by 2060, China’s electrification rate will reach approximately 70%, with the vast majority of electricity demand met by renewable energy. From a policy perspective, China has formulated and implemented a series of new-energy development policies, including the 14th Five-Year Plan for Renewable Energy Development, which have laid the foundation for the gradual increase in the share of new energy in the power system and facilitated the transformation of the power system—from quantitative changes to qualitative leaps—under the integration of high shares of new energy.

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2024/02/13

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Current Market Conditions and Future Trends in the Power Industry

The growth in power generation has slowed markedly. In recent years, China’s power output maintained a high growth rate: from 2007 to 2011, it increased from 3,255.9 billion kilowatt-hours to 4,721.7 billion kilowatt-hours, a rise of about 45%, with an average annual growth rate of 11.1%. However, by 2012 the growth rate had rapidly decelerated to 4.7%, and further declined to 3.2% in 2014. Although there was a rebound in 2013, with a growth rate of 7.5%, the overall trend has clearly shown a marked slowdown. In 2014, national power generation totaled 5,463.8 billion kilowatt-hours, of which hydropower increased by 18% year on year, and nuclear power grew by…

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2020/06/24

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The World Cup Must Be “Full of Energy”

Who is the most stressed during the World Cup? Players, coaches, fans, bettors—and perhaps even power-company employees around the globe. Take Brazil, the host nation of this tournament, as an example: in the past, the country was the envy of the world for its high share of green, hydropower-generated electricity. Yet in recent years, prolonged droughts have led to water shortages and power outages, while the surge in electricity demand during the World Cup has prompted all sectors to re-examine the country’s energy mix.

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2020/06/24

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[Series Commentary on the New Electricity Reform] Safety and Reliability Are the Foundation

Deepening the reform of the power sector is an urgent and arduous task; precisely because of this, it is all the more essential that we advance the reform in a steady and orderly manner, steadfastly uphold the safety bottom line, never cross the safety red line, and adhere to the important principle of “ensuring safety and reliability.”

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2020/06/24

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