Research On Planning Optimization Model And Management Of Green And Low-carbon Developmen In Qinghai Power Grid

Environmental protection and green development have become issues of common concern.China’s electricity generation is currently still dominated by coal power;therefore,the power industry has long been one of the main emitters of carbon dioxide,dust,and nitrogen oxides.Against the backdrop of green development,the traditional coal-dominated power development is facing tremendous pressure toward green and low carbon development.It is therefore urgent to conduct structural adjustment and management optimization.In the report of the 19th CPC National Congress,the statement "promotion of the energy production and consumption revolution and building a clean,low-carbon,safe and efficient energy system" has preset the direction for China’s energy development.This implies that energy transition has advanced to the national strategic level.New energy is clean,safe,flexible,and economical.Its rapid development has propelled the power industry into a new era of green development.The keys to the development of green power lie in the development and production of new energy and the efficiency of grid transmission.Therefore,research on grid green planning optimization is of great importance to promote the rapid development of new energy.Although new energy has very significant effects for promoting the green development of electric power,due to its intermittent and fluctuating characteristics,conventional grids often become require more complicated planning and construction,dispatching methods,operation,and maintenance.Therefore,on the one hand,green development of electric power requires that the grid considers new energy development as an important factor during the planning stage to achieve an effective connection between grid planning and power planning;on the other hand,it is necessary to continuously strengthen research on the complementary integration of new energy and conventional power.This will increase the scope for new energy generation and consumption,and maximize the realization of green power development benefits.Based on these considerations,this paper focuses on the theme of green power development as well as on the research of coordinated planning of power grids and power sources,multi-energy complementary integration optimization,and the comprehensive benefit evaluation of grid-planning projects.The main research results and innovations are listed in the following:(1)A comprehensive optimal combined forecasting model for the power consumption of the Qinghai Power Grid was established.Based on the strategic background of ecological environmental protection and green development in Qinghai,China,research was conducted on power consumption and power load forecasting models.First,a terminal energy consumption structure prediction analysis based on Markov model was carried out.The results showed that Qinghai’s terminal energy consumption structure will undergo significant changes within the next few years,with a clear trend of electricity substitution.Secondly,a comprehensive and optimal combined forecasting model for the power consumption of Qinghai Power Grid was established.Based on this model,the development of the power consumption of the Qinghai Power Grid was predicted,and the prediction accuracy was verified.The results showed that the model achieved high forecast accuracy and can be effectively used for power-load forecasting.The model can be used to predict the power consumption in Qinghai.and to provide a basis for grid-development planning.(2)An optimization model for collaborative planning of power grids and power sources was established under the background of green development of the Qinghai Power Grid.This paper introduces the development of new energy sources into power-grid planning,and builds a multi-level multi-objective collaborative planning optimization model for both power grid and power supply.With the comprehensive minimum cost as the objective function,improved cat swarm optimization(C-CSO)based on chaos theory was used to optimize the solution,and an optimized grid collaborative planning scheme was obtained.The model can be used for the planning of regional grid development.The development of coordinated power grid planning that considers new energy sources offers a two-fold benefit.On the one hand,it can effectively promote the consumption of new energy generation and reduce the use of fossil energy resources at the source;on the other hand,it can promote the continuous optimization and improvement of the grid structure,promote a more reasonable grid layout,and improve resource allocation capabilities;moreover,it can provide good access for new energy grid-connected power generation,promote the efficiency improvement of power grid companies and power supply companies.and promote an organized,healthy,and green development of power systems.(3)A multi-energy complementary integrated optimization model for the green development and collaborative planning of grid/source of the Qinghai Power Grid was established.Based on the Qinghai new energy development and grid development planning,a multi-energy complementary index was determined.It includes factors such as power load,power capacity,power generation characteristics,reliability,and power purchase.The power generation characteristics and complementary characteristics of wind power and photovoltaic have been analyzed.An integrated optimization model based on wind,photovoltaic,water,and fire multi-energy complementarity was established.Using the comprehensive minimum cost as objective function,the branch and bound algorithm(B&B)was used to analyze this model.The results showed that multi-energy complementarity can minimize the imbalance of new energy in terms of time and space,further broaden the space for new energy consumption,reduce the wastage of new energy,and reduce the consumption of fossil fuel resources.Research on multi-energy complementary integration optimization can guide power planners to continuously identify problems and space for the coordinated planning of power grids and power sources.This will continuously improve power development planning and promote the continuous improvement of the power grid structure as well as the continuous optimization of the layout of new energy development.(4)A comprehensive benefit evaluation model for the Qinghai Power Grid Green Development Grid Collaborative Planning Project was established.This paper constructed a comprehensive benefit evaluation index system for grid collaborative planning projects.This index system includes 13 indicators in the following four aspects:environmental benefits,national economic benefits,enterprise economic benefits,and social benefits.The weight of each index is calculated based on the combination of both analytic hierarchy process and entropy weight method.The positive and negative ideal solutions were found using the ideal solution method(TOPSIS).The evaluation result was obtained by calculating the distances between each grid planning project and the positive and negative ideal solutions.Based on the calculation and comparison of evaluations of multiple schemes,the optimal grid coordination planning scheme obtained in this paper was identified as the best in the comprehensive benefit assessment.This confirms that the research results of grid and power coordination planning research conducted in this paper can help to promote the green development of power.(5)Countermeasures and suggestions for the green and low carbon development management of the Qinghai Power Grid were suggested.This study explored countermeasures for the optimal management of green development of the power grid.These include the strengthening of the coordinated planning of the power grid and power supply to achieve scientific grid development and planning as well as rational layout of the power grid.This will accelerate the construction of the energy Internet and smart grid to fully utilize their advantages of grid resource allocation,while strengthening the implementation of renewable energy power quota systems to promote new energy consumption.At the same time,relevant suggestions for the green development of the Qinghai Power Grid are provided based on the actual situations.These mainly include strengthening the research on safe connection of new energy sources,and the research on new energy power generation forecasting.Moreover,the research on preferential access technologies for new energy sources is deepened,and the establishment of market-oriented new energy consumption guarantee mechanism is accelerated.These measures promote the development of new energy and the green development of electricity.