Discussion on Power System Energy Saving Technology

Power Electronics Discussion on Energy-Saving Technology in Power Systems Wen/Han Qiu emphasized that environmental protection issues are being increasingly taken into account by more and more countries. The power system, as the foundation of China's national economy, plays a huge role in the work of energy saving and emission reduction. Therefore, in accordance with the overall requirements of the national energy conservation and emission reduction work, the goal of the energy saving and emission reduction of the power system is clearly defined, and the energy saving and emission reduction work is strengthened. Management, and constantly accelerating the application of advanced science and technology have significant practical significance for the development of civilian police in China and the economical use of social resources.

With the rapid growth of our country’s economy, various constructions have made tremendous achievements, but at the same time they have also paid a huge price, and resources and the environment have been severely damaged. On the one hand, the power system is accelerating its development, actively adopting demand-side management measures, and continuously improving the safe and stable operation and power supply quality, basically meeting the needs of China's economic development and people's lives. On the other hand, under the background that the per capita possession of resources in China is low and the environmental problems with low energy use efficiency are becoming increasingly prominent, the energy saving and emission reduction of the power system has become an important issue for the development of China's power industry.

1 Significance of energy saving and emission reduction in power systems The significance of energy saving and emission reduction lies in the fact that it is conducive to implementing the scientific concept of development, promoting economic restructuring, transforming the mode of economic development, and enhancing the capacity for sustainable development. It is beneficial to reduce the dependence of enterprises on resources, and gradually shifts from low-energy, high-tech, and high-efficiency methods to high-energy, low-production methods. Second, it will help reduce the emission of harmful substances, protect the ecological environment, and leave a fresh, green and environmentally friendly living space for future generations. Finally, effectively reducing greenhouse gas emissions and strengthening energy conservation and emission reduction work will help control global warming.

2 The situation of energy saving in China's power system According to the air pollution prevention and control action promulgated by the State Council, China began to enter the full name to mobilize to conduct a comprehensive period of air pollution control. Under this background, the energy saving and emission reduction of the power system has been further monitored by the government. The attention of the whole society has also made new achievements in energy conservation and emission reduction.

2.1 Further optimization of power structure The proportion of non-fossil energy represented by solar energy, wind energy, and hydropower is further increased. As far as China is concerned, on the one hand, hydropower, nuclear power, wind power, solar power and other power generating equipment have increased at a faster rate than the same period of last year. At 5%, 14%, 36%, and 143%, the total installed capacity of thermal power on the other side fell further.

2.2 The improvement of power technology level and efficiency The improvement of the level and efficiency of fast power technology is mainly reflected in the increasing transmission capacity of special pressure, such as the addition of more than one thousand meters of 1000kv AC transmission lines. In addition, the power system actively adopts supercritical units and continues to promote advanced technologies such as large-scale air-cooling and circulating fluidized beds. Under the influence of technological advancement and enhanced management, thermal power has been greatly reduced.

3 Existing Problems in Power System Energy Saving At this stage, although the energy saving and emission reduction effect of the power system has achieved good results, some problems have still not been fundamentally solved, and are gradually exposed as the economy continues to develop.

3.1 The desulfurization equipment quality and operation management level are not high At this stage, the state has increasingly stricter requirements for thermal power plant flue gas desulphurization, and the task of desulfurization equipment construction is more important and more onerous. Due to vicious competition, desulfurization equipment has defects in both design and construction, which seriously affects long-term, stable and safe operation of desulfurization equipment. On the other hand, the design of the desulfurization equipment did not take into account actual conditions, and the design volume was too small, resulting in that the desulfurization equipment could not meet the requirements of the thermal power plant after it was put into operation. In addition, the high repair costs also put pressure on the power companies.

3.2 Inadequate economic incentive mechanism for energy saving and emission reduction of thermal power plants As far as the current situation is concerned, most of the power companies in China are based on energy saving and emission reduction measures that are stipulated in the laws and regulations of national policies. Stage. Such energy-saving and emission-reducing effects are limited and require long-term supervision by government departments. Therefore, it is necessary to research and establish a sound and long-term mechanism for economic incentives. The government will use the market's regulatory role to ensure that the power companies are energy-saving in their own initiative and enthusiasm by implementing energy-saving and emission-reducing power companies to reduce taxes or increase subsidies.

3.3 The reduction of electric coal consumption affects the effect of energy-saving and emission-reduction Because the quality of electric coal is not high at present, there is a decrease in calorific value, and the content of ash and sulfur in electric coal rises sharply, resulting in large impact on the normal output of the generator set and causing severe wear. Power generation equipment increases the power consumption of thermal power plants and reduces the power generation efficiency. In addition, due to the increase in sulfur content caused by the operation of the desulfurization equipment overload, desulfurization efficiency to achieve the requirements.

4 Power System Technical Measures The power system consists of three parts: a power plant, a power grid and users. It is responsible for the production and consumption of electricity. In the power system, there is a huge energy consumption in every part. Therefore, how to reasonably select the power system operation plan and achieve energy saving in each part is an important guarantee for completing the energy saving and emission reduction of the power system.

4.1 Technical Energy Saving of Power Plants At this stage, China's power plants are mainly based on thermal power, and the amount of coal consumed by thermal power plants is alarming each year. Therefore, there is a huge space for development in thermal power conservation. First of all, it is necessary to test and maintain the thermal power unit on a regular basis to ensure the safety and reliability of the generating unit operation: to optimize the operation mode of the generating unit and improve its economic operation. Second, waste emissions from power generation must be rationally treated and recycled, and scientific adjustments must be made to the purchase and use of fuel. Finally, we will vigorously develop the use of new clean renewable energy sources, such as solar power generation, hydroelectric power generation, nuclear power generation, etc., to further reduce the consumption of conventional energy such as coal and reduce waste emissions.

4.2 Energy Saving Technology of Transmission Network The energy saving of transmission network mainly comes from three aspects: the overall structure of the power grid, the choice of transformers, and the application of power line technology. First of all, we must design and plan the transmission network reasonably to ensure the quality of the transmission network construction. When constructing, we should try to use circular or multi-channel power supply to reduce the voltage level of the transmission network, and thus the operating cost of the power grid. In addition, we must adjust the load in time. Reduce unnecessary no-load losses. Secondly, in the selection of transformers, through scientific calculations, the size of the transformer should be reasonably selected based on the actual conditions of power consumption, and the K-position of the user's reactive power compensation equipment should be strengthened. In addition, maintenance transformers should be regularly checked to reduce energy consumption at the expense of energy. Finally, it is necessary to increase the use of new materials and technologies, reduce the line loss of transmission lines, and use advanced computer technology to strengthen the monitoring of the power system and increase the level of utilization of electricity.

4.3 Technical Energy Saving of the User Terminal First, in the indoor electric heating, the user can install a heat distribution meter and a temperature control valve and control the power supply by himself, thereby achieving the purpose of comfort and energy saving. Second, the use of effective lighting systems, improve the efficiency of electricity and lighting effects, and vigorously promote the use of energy-saving appliances, reducing the energy consumption of electrical appliances. Secondly, power supply companies must adopt energy-saving controllers to effectively control the peak-to-peak loading of the power grid and improve the operation of the power grid.

5 Conclusion Power system energy-saving emission reduction work, under the requirements of policies and regulations, through regulations, markets and supervision at the same time, improve the awareness of energy companies in energy conservation, optimize the power structure. There is still a long way to go in the development of energy conservation and emission reduction in the power industry in China. This is an arduous and long-term task.

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