Detailed explanation and measure analysis of key technology of transformer energy saving and consumption reduction

Because of distribution transformer and power supply and distribution system, the proportion of single-phase power load is heavier, and with a variety of energy-saving electrical equipment widely used, energy-saving lamps and lanterns, distribution transformer, especially public distribution transformer for larger three phase unbalanced load, corresponding to cause the loss is bigger, which means loss caused by the unbalanced three-phase load is very large, Is a key point of transformer energy-saving economic operation research. Through reasonable load optimization and adjustment, the unbalance degree of three phase load is reduced, and the three-phase load of distribution transformer is almost balanced. In this way, the better phase balance relationship can be obtained, and the active power loss and reactive power consumption in the operation of distribution transformer can be reduced, and the efficiency of energy distribution, dispatching and conversion can be improved.

It can be seen from the distribution transformer operating condition and the load curve between the load and the transformer that the reactive load of the distribution transformer is mainly concentrated in the light load or no-load operating condition, which will generate excitation reactive power and consume reactive power capacity about 10% ~ 15% of the rated capacity of the distribution transformer. May take centralized reactive compensation measures, therefore, by reasonable selection SVC, SVG, TSC reactive compensation devices, such as reactive compensation capacitor is mortgaged through received distribution transformer load switch busbar side, when system is running in the light load or no-load condition, reasonable cutting reactive compensation capacitor in real time, improve the power factor of 10 kv power distribution system, It can effectively reduce the operation loss of distribution transformer and achieve the energy-saving and economic effect of improving the voltage quality by increasing the end low voltage.

To sum up, in the distribution network, reasonable selection of energy-saving distribution transformers, joint economic dispatching operation of multiple distribution transformers, optimization and adjustment of three-phase load, appropriate reactive power compensation and other energy-saving measures can reduce the operation loss of distribution transformers and achieve the purpose of energy-saving and economic-control operation.