Module sleep technology and energy saving solution

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Overview:
1 Introduction In China, high-frequency switching power supply modules are widely used in power, communications, railway, chemical and other industries. In order to save costs, it is common and urgent to improve the efficiency of switching power supply modules. Demand. Each module manufacturer has also invested a large amount of money in the development of new power modules, trying to improve module conversion efficiency and reduce the loss of the power module itself. For security and reliability reasons, the user of the module usually adopts the power module redundancy configuration, and the reserved battery capacity is not used under normal working conditions. This makes the switching power supply module work at a low load rate for a long time, and the conversion efficiency is very low, resulting in waste of resources.

2 Energy-saving technology research and development background
2.1 The power industry is the basic industry of the national economy. It provides clean and efficient energy to the society. As technology advances and productivity continues to increase, the share of electricity and electricity-related operating costs is growing dramatically. In order to improve efficiency, reduce losses, and reduce operating costs, power supply enterprises and users have higher and higher requirements for power system operation and management. Under the continuous international energy and climate issues, countries have vigorously promoted the construction of smart grids, and hope to promote the optimal allocation and operation of power resources through real-time control and demand-side management to achieve energy-saving and emission reduction targets. Energy conservation and consumption reduction have become our focus and special research topics.
2.2 In the power industry, in all DC power systems, such as power plants and substations, usually high-frequency switching power supply equipment in the procurement process, will consider the system rectifier module N+1 backup and later expansion requirements, often switching power supply capacity The selection is larger than the actual load of the currently running equipment. The redundant switching power supply module is not recognized, the sleep soft shutdown and the intelligent control function are performed. As a result, the actual working load rate of the power supply is low, resulting in waste of energy consumption.

3 Energy-saving analysis of high-frequency switching power supply modules The conversion loss of high-frequency switching power supply modules mainly includes output power consumption, load loss and no-load loss. The output power consumption is determined by the load current and cannot reduce the power consumption. The main determinant of the load loss is the conversion efficiency of the module. The higher the conversion efficiency, the less the load loss. The no-load loss is the normal operating loss of each device inside the module.
The efficiency characteristic of the high-frequency switching power supply module is that the efficiency increases with the increase of the load current in a certain interval, and the optimal efficiency interval of the system is generally between 40% and 80%. Therefore, we can improve the module efficiency by adjusting the load rate, thus reducing the load loss. The no-load loss can be reduced by collecting the actual load size, calculating the number of modules required, and turning off the appropriate module. According to the above, the module sleep technology can effectively improve the conversion efficiency and achieve energy saving without increasing the cost.
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