09,22,2026 10 views
The traditional methods for improving the environment of substations generally adopt the following measures: combining air conditioning with exhaust fans (or axial fans) for cooling, dehumidifiers for dehumidification, and electric heaters for heating and anti condensation. The disorderliness of the aerodynamic effects of traditional ventilation and cooling measures has generated a large number of air vortices or turbulent flows in the space around electrical equipment. This airflow either collides with each other in the space or rotates in place, which not only fails to dissipate the carried heat outdoors, but also becomes a heat storage body, contributing to the increase in indoor temperature. At the same time, a large amount of power is wasted, which has become an important reason for the low efficiency and poor cost-effectiveness of traditional ventilation and cooling measures. And strong ventilation brings a large amount of dust and floating salts or acidic substances in the air, which adhere to the surface of equipment or insulators, form dirt, corrode equipment, and even form discharge channels; Excessive cooling can cause a decrease in the humidity capacity of the air, with humidity rising to saturation and forming condensation on the surface of equipment or insulation. If dirt and condensation combine, it will pose a serious threat to the operation of electrical equipment. So people had to turn on the heater again to remove condensation and start the dehumidifier for dehumidification.
From this, it can be seen that traditional ventilation measures are contradictory to the dust and dirt prevention needs of electrical equipment, and cooling measures are contradictory to moisture-proof requirements. This system is a high-tech environmental control device used for real-time monitoring of operating environments such as substations, distribution rooms, and ring main units. The establishment of an intelligent control system for the operating environment can effectively reduce the probability of substation failures, improve the reliability and stability of substation operation, and discharge toxic and suffocating gases in the substation in real time, ensuring the safety of incoming workers. At the same time, the intelligent control device can also timely and effectively notify relevant personnel through the corresponding intelligent networking platform based on real-time monitoring of the on-site environment, achieving remote control.
The NPZ-DL-002 intelligent control system for operating environment is based on the following basic principles, forming a strong theoretical support:
The principle of thermal equilibrium, the second law of thermodynamics, and the law of conservation of energy. To solve thermodynamic problems such as thermal balance and thermal efficiency in environmental control.
◆Principles of aerodynamics. To solve aerodynamic problems such as airflow guidance and control.
◆Local Microclimate Theory. To solve the microclimate optimization problem of enclosed spaces in substations.
◆Computer Automatic Control Theory. To solve many problems related to system optimization and intelligent control.
◆Systematize environmental control. Integrate and balance various environmental factors that affect the substation and their control requirements for ventilation, cooling, pollution prevention, drying, noise reduction, etc. through a computer, and develop corresponding control strategies for different application conditions.
◆Collection of temperature, humidity, and air quality data. Reasonably arrange or set up multiple sensors to provide high-quality data sources for computer intelligent environmental control. Establish a negative feedback control relationship between the air outlet temperature and the equipment temperature rise, and apply it to air volume regulation to control the temperature rise. Then, use the temperature rise to control the heat dissipation of the equipment, thereby achieving dynamic thermal balance of the equipment;
◆Airflow guidance and flow velocity control. By using mechanical pressurization and well-designed guidance measures, a unidirectional controllable airflow channel is formed between the electrical equipment and the air outlet for cooler air, which improves the heat dissipation effect of air convection and reduces or eliminates the negative effects of turbulence and eddies
◆Selection and arrangement of air vents. By analyzing the thermal field of the substation and selecting appropriate inlet and outlet ports based on the distribution of elevation differences, natural convection of air is formed and utilized.
The NPZ-DL-002 intelligent control system for operating environment is born with the mission of improving the safety and reliability of substation equipment, enhancing the working environment of substations, and promoting the development of smart grids through energy conservation and emission reduction. The application system integrates sensor technology, computer automatic control technology, displacement ventilation technology, and numerical simulation and calculation of computational fluid dynamics (CFD) in the field of heating, ventilation, and air conditioning (HAVC). The system adopts multiple distributed sensor technologies to comprehensively evaluate the performance indicators of the substation operating environment; According to the evaluation results, by utilizing aerodynamics and heat transfer principles, integrated intelligent control can be achieved on an embedded platform, which includes air conditioning, fresh air, access control, dynamic environment monitoring, remote control, centralized management, water leakage, smoke detection, open flames, network video and all other elements of the power distribution room. This integrated solution can effectively improve the operating conditions of enclosed spaces such as substations, significantly reduce the probability of equipment failure, minimize the probability of creepage and arc flash, and avoid unnecessary losses. This is of great significance.
