As of March this year, a new round of power system reform involving the five links of power system development, transmission, distribution, sale and use has gone through five years. Under the joint action of a series of electricity reform measures, China's electricity market-oriented trading scale has expanded year by year. By 2019, only the medium and long-term direct trading electricity in the national electricity market has reached 2177.14 billion kwh, accounting for 30.1% of the total social electricity consumption.
The reform of electric power system is a profound adjustment to the productivity and production relations of the electric power industry. It is a systematic project, which requires the participation of the government, enterprises, relevant colleges and universities, research institutions and social organizations. Therefore, to change the "flexible method" of power system reform is to change the one-way chain structure before the power industry into a multi-directional network structure with the power grid as the basic pipe network channel and the direct interaction among power generation, power grid, power sales, users and emerging businesses. China's power grid benefits from the development of UHV. The large power grids in all regions of the country are connected to each other, forming a national unified power grid, realizing the overall optimization of supply and demand resources in the unified region, fully tapping and releasing the potential of power generation and consumption resources in the connected regions, and achieving the maximum social welfare. Over the past five years, China's electric power system reform has been gradually pushed forward. Through the supervision and examination of power grid cost and the verification of transmission and distribution electricity price, the power system and mechanism have been continuously innovated. Through continuously promoting the independent and standardized operation of trading institutions, continuously expanding the scale of electric power market-oriented trading, accelerating the reform of incremental distribution business and steadily promoting the construction of electric power spot market, the power system and mechanism have been continuously innovated Win new breakthroughs. Today, China has become the first country in the world to fully master UHV AC / DC transmission technology and realize commercial operation, occupying the commanding height of the world's transmission technology, realizing "China creation" and "China leading" in the field of world transmission technology; Breaking through the major technical problems such as large power grid dispatching operation and wide area dynamic monitoring, we independently developed and built a new generation of simulation system with the strongest simulation ability, the highest calculation efficiency and the most accurate simulation accuracy, and built a standard system based on the power system safety and stability guidelines. China Power grid has become the only large-scale power grid in the world without major blackout in 20 years; Since 2007, State Grid has also increased overseas investment with the Philippines, Brazil, Portugal and other countries to promote grid interconnection and international energy cooperation in a wider range.
Therefore, the reform of the electric power system is not a temporary success, let alone an overnight success. We should try our best to reduce the government's "visible hand" unreasonable intervention, make full use of the "invisible hand" of the market, increase the reform of incremental distribution business, promote power trading, power sales side reform, incremental distribution business reform, pilot construction of spot power market, and maintain order, so as to provide strong power guarantee for China's economic development.