长期以来，受历史原因和客观条件的制约，电网规划的重点是1l0kV及以上

For a long time, restricted by historical reasons and objective conditions, the focus of power grid planning has been power grid planning with voltage levels of 110kV and above. To a certain extent, it has neglected the planning of low and medium distribution networks, while the low-voltage distribution network planning has basically not considered. For example, in the "Eleventh Five-Year Development Plan for the Power Grid of City A", only one chapter is set up in the power grid planning text to describe the medium and low voltage distribution network planning. It can be seen that the medium and low voltage distribution network planning has not attracted enough attention, leading to The power grid construction plan lags far behind the construction plan of the high-voltage power transmission system. For a long time, a systematic planning work system for medium and low voltage distribution network and a project management system centered on the target grid has not been established [2]. <br>At present, domestic and foreign countries have conducted in-depth discussions and studies on various topics such as planning methods, load forecasting, and wiring patterns in medium voltage distribution network planning. However, they mainly focus on theoretical research such as mathematical models, and the application in combination with actual conditions is more important. less. The discussion on low-voltage distribution network planning simply stays at the level of technical principles such as low-voltage distribution network power supply mode, conductor cross-section, distribution points, and pole fittings selection. The low-voltage distribution network planning based on actual conditions is basically a blank.[ 3]. Distribution network planning is often completed by means of external entrustment. Shanyu’s external commissioners lack professional skills, and the analysis of the status quo is basically a decoration, and it is basically out of touch with the status quo of the medium and low voltage distribution network. It lacks a combination of actual conditions and guidance in practice. The content of low-voltage distribution network construction lacks a comprehensive analysis, search and summary of the existing 110kV distribution network problems and their causes, and on this basis, the 110KV distribution network planning method, project construction, and engineering design are proposed. Optimization measures for professional skills training.

For a long time, by historical reasons and objective conditions, the focus of power grid planning is 1l0kV and above voltage level of power grid planning, to a certain extent, ignored the low-to-medium distribution network planning work, and low-voltage distribution network planning is basically not considered, for example, in the "A City Grid 11th Five-Year Development Plan", only set up a chapter in the grid planning text to explain the content of low-voltage distribution network planning, it can be seen that the low-voltage distribution network planning did not cause enough attention. The construction planning of distribution network lags far behind the construction planning of high-voltage transmission system, and the systematic system of medium and low voltage distribution network planning and the project management system with the target network frame as the core have not been established for a long time.<br>At present, there are more in-depth discussions and studies on various topics such as planning methods, load prediction and wiring patterns in the planning of medium voltage distribution networks at home and abroad, but they are mainly concentrated in theoretical research such as mathematical models, which are applied less in combination with the actual situation. And for the low-voltage distribution network planning discussion is only a simple stay in the low-voltage distribution network power supply mode, wire cross-section, distribution cloth point, electric rod gold selection and other technical principles of the level, combined with the actual situation of low-voltage distribution network planning is basically a blank. Distribution network planning work is often done by means of external entrustment, mountain in the foreign committee personnel's lack of professional skills, analysis of the status quo is basically set up, not cut into the key, and the status quo of low-voltage distribution network is basically out of touch, lack of combined with the actual situation, guide the actual construction of low-voltage distribution network content, lack of existing 110kV distribution network problems and their reasons for a comprehensive analysis, find and summarize, and on this basis put forward 110KV distribution network planning methods and project construction. Optimization measures for professional skills development.

For a long time, restricted by historical reasons and objective conditions, the focus of power grid planning is the power grid planning of 1kV and above voltage level. To a certain extent, the planning of medium and low voltage distribution network has been ignored, while the planning of low voltage distribution network has not been considered. For example, in the 11th five year development plan of power grid of city a, only a chapter of medium and low voltage distribution network has been set up in the power grid planning It can be seen from the distribution network planning that the medium and low voltage distribution network planning has not attracted enough attention, which leads to the distribution network construction planning lagging far behind the construction planning of high voltage transmission system. For a long time, the systematic medium and low voltage distribution network planning system and the project management system with the target grid as the core have not been established [2].<br>At present, there are more in-depth discussions and researches on the planning method, load forecasting, connection mode and other topics in the medium voltage distribution network planning at home and abroad, but they mainly focus on the theoretical research such as mathematical model, and the application combined with the actual situation is less. However, the discussion of low-voltage distribution network planning simply stays at the level of technical principles such as power supply mode, conductor section, distribution transformer distribution points, pole fittings selection, etc. the low-voltage distribution network planning combined with the actual situation is basically a blank [3]. Distribution network planning is often completed by means of external entrustment. Due to the lack of professional skills of the outsourcing personnel, the analysis of the current situation is basically a decoration, which is not to the point. It is basically out of touch with the current situation of the medium and low voltage distribution network. It lacks the content to guide the actual construction of the medium and low voltage distribution network in combination with the actual situation, and it lacks the comprehensive analysis, search and summary of the existing problems and their causes of the 110 kV distribution network On this basis, it puts forward the planning method of 110kV distribution network and the optimization measures of project construction, engineering design and professional skills training.<br>