In order to standardize the power grid planning and design work, define the scope and focus of the power grid planning and design work, carry out targeted work, learn from the experience of power grid planning and design, establish a rolling mechanism for power grid planning and design, and the State Grid Corporation has formulated the State Grid Corporation's power grid planning. The Design Content Depth Regulation (Trial) (hereinafter referred to as the “Regulationsâ€) is issued in the National Grid Code [2003] No. 312.
The Regulations include general rules, planning and design basis and main principles, grid status, power demand forecasting, power supply planning, power balance, grid planning and grid structure demonstration, electrical calculation, power transmission and transformation projects and investment estimates, conclusions and recommendations. A total of nine parts.
The "Regulations" stated that the provisions are applicable to the planning and design of 220 kV and above power grids for regional power grids and provincial power grids within the jurisdiction of State Grid Corporation. Under the guidance of the national network planning, the regional power grid focuses on the research of 330 kV and above power grids; the provincial power grid focuses on the research of 330 and 220 kV power grids under the guidance of regional power grid planning, and can also study the power grids above 330 kV as appropriate. .
The "Regulations" pointed out that in accordance with the requirements of the power industry to implement the "factory network separation, bidding online, national supervision" system reform for power grid companies and power grid development, power grid planning should follow the market-oriented, security and stability based on the economic benefits The principle of the center is to achieve scientific argumentation, advanced technology and economic rationality. The power grid planning should guide the power supply construction layout from the overall benefit under the guidance of the national power development plan; the recommended power supply construction plan is the basis of the power grid planning, and sensitivity analysis should be done when the power supply construction plan changes.
The power grid planning and design is entrusted by the qualified commissioning agency of the power grid company, focusing on the overall study of the power grid planning scheme and the power grid structure. Through the comprehensive comparison of technical and economic aspects of multiple schemes, it is recommended to plan the power grids for each level in the planning period and propose a phased loss. Substation projects, construction scale and investment estimates. The approved power grid planning program serves as the basis for the grid company to prepare the power grid development plan and the construction of power transmission and transformation projects.
The power grid planning and design includes three phases: short-term, medium-term and long-term, and it follows the idea of ​​“near-by-fine, far-reaching combinationâ€. The design period should be consistent with the years of national economic and social development planning. The short-term planning is about 5 years, the medium-term planning is about 5 to 15 years, and the long-term planning is more than 15 years. The recent plan focuses on the optimization and adjustment of the recent power transmission and transformation construction projects; the medium-term planning focuses on the comparison and selection of multiple schemes for the grid grid, recommending grid schemes and power transmission and transformation projects, and proposing a reasonable grid structure; long-term planning Focus on strategic, framework and structural research and outlook for the main grid.
The "Regulations" pointed out that a reasonable grid structure should meet the following basic requirements:
1. Meet the development needs of the power market, moderately advanced, and have strong adaptability;
2. Safe and reliable, flexible and economical;
3. Implement the principle of hierarchical zoning, the structure of the grid is simple and clear;
4. The reactive power configuration and the trend of the current flow are reasonable, and the short circuit level of the control system is controlled.
The authenticity of this information has not been confirmed by the international electrical network, for your reference only.
The Regulations include general rules, planning and design basis and main principles, grid status, power demand forecasting, power supply planning, power balance, grid planning and grid structure demonstration, electrical calculation, power transmission and transformation projects and investment estimates, conclusions and recommendations. A total of nine parts.
The "Regulations" stated that the provisions are applicable to the planning and design of 220 kV and above power grids for regional power grids and provincial power grids within the jurisdiction of State Grid Corporation. Under the guidance of the national network planning, the regional power grid focuses on the research of 330 kV and above power grids; the provincial power grid focuses on the research of 330 and 220 kV power grids under the guidance of regional power grid planning, and can also study the power grids above 330 kV as appropriate. .
The "Regulations" pointed out that in accordance with the requirements of the power industry to implement the "factory network separation, bidding online, national supervision" system reform for power grid companies and power grid development, power grid planning should follow the market-oriented, security and stability based on the economic benefits The principle of the center is to achieve scientific argumentation, advanced technology and economic rationality. The power grid planning should guide the power supply construction layout from the overall benefit under the guidance of the national power development plan; the recommended power supply construction plan is the basis of the power grid planning, and sensitivity analysis should be done when the power supply construction plan changes.
The power grid planning and design is entrusted by the qualified commissioning agency of the power grid company, focusing on the overall study of the power grid planning scheme and the power grid structure. Through the comprehensive comparison of technical and economic aspects of multiple schemes, it is recommended to plan the power grids for each level in the planning period and propose a phased loss. Substation projects, construction scale and investment estimates. The approved power grid planning program serves as the basis for the grid company to prepare the power grid development plan and the construction of power transmission and transformation projects.
The power grid planning and design includes three phases: short-term, medium-term and long-term, and it follows the idea of ​​“near-by-fine, far-reaching combinationâ€. The design period should be consistent with the years of national economic and social development planning. The short-term planning is about 5 years, the medium-term planning is about 5 to 15 years, and the long-term planning is more than 15 years. The recent plan focuses on the optimization and adjustment of the recent power transmission and transformation construction projects; the medium-term planning focuses on the comparison and selection of multiple schemes for the grid grid, recommending grid schemes and power transmission and transformation projects, and proposing a reasonable grid structure; long-term planning Focus on strategic, framework and structural research and outlook for the main grid.
The "Regulations" pointed out that a reasonable grid structure should meet the following basic requirements:
1. Meet the development needs of the power market, moderately advanced, and have strong adaptability;
2. Safe and reliable, flexible and economical;
3. Implement the principle of hierarchical zoning, the structure of the grid is simple and clear;
4. The reactive power configuration and the trend of the current flow are reasonable, and the short circuit level of the control system is controlled.
The authenticity of this information has not been confirmed by the international electrical network, for your reference only.
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