1、 Power Network Planning Alignment
This requirement emphasizes that substation construction must be rooted in overall power network planning to avoid blind development. The core points include:
- Clarify the type and function of the substation (e.g., whether it is a power transmission substation or a distribution substation) and its positioning in the grid.
- Determine the long-term and short-term construction scale, including specific indicators such as the number of incoming/outgoing circuits and transformer capacity.
- The ultimate goal is to ensure that the substation can strengthen the power grid’s function (e.g., improving transmission capacity, optimizing power flow) and effectively meet the growing power supply needs of users.
2、 Land-Saving Construction Principle
Against the background of protecting cultivated land and rational use of land resources, this requirement puts forward clear land use standards:
- Prioritize less land occupation, avoid or minimize the use of cultivated land, and give preference to wasteland, hillsides, or other idle land for construction.
- Implement land-saving measures in two key links: the layout of power distribution equipment (e.g., adopting compact equipment arrangement schemes) and the general layout of the substation (e.g., optimizing the layout of buildings and equipment areas to reduce redundant space).
3、Rational Design of Main Electrical Wiring
The main electrical wiring is the “artery” of the substation, and its design needs to balance reliability and economy:
- Determine the wiring scheme based on three factors: the substation’s type (e.g., 110kV or 220kV substation), construction scale, and its role in the power grid (e.g., whether it is a key hub station).
- On one hand, ensure the wiring can improve power supply reliability (e.g., adopting dual-bus wiring to avoid single-point failures). On the other hand, use simple wiring forms as much as possible (e.g., single-bus section wiring for small-scale substations) to reduce initial construction investment and later operating maintenance costs.
4、Safety and Maintenance-Friendly Requirements
This requirement focuses on ensuring the safe and stable operation of the substation and facilitating daily management:
- All facilities in the substation must meet the standards for safe operation (e.g., sufficient safety distances between equipment) and convenient maintenance (e.g., reserved maintenance channels and operating space).
- For all electrical equipment that is prone to misoperation (e.g., circuit breakers, disconnectors), locking devices must be installed (e.g., mechanical locks, electrical interlocks) to prevent incorrect operation by personnel, thereby ensuring the safety of operators and the stable operation of equipment.
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