Reliable Power Supply Box Transformer At present, the main power supply mode of the low-voltage distribution network is three-phase four-wire system. The power equipment in the distribution network is mostly single-phase load or single-phase or three-phase hybrid load. Due to the different...
Reliable Power Supply Box Transformer
At present, the main power supply mode of the low-voltage distribution network is three-phase four-wire system. The power equipment in the distribution network is mostly single-phase load or single-phase or three-phase hybrid load. Due to the different timeliness of the power equipment, the transformer is almost running. In the three-phase unbalanced state, the three-phase unbalance cannot be avoided without adding equipment. Moreover, due to the particularity of China's low-voltage distribution network, its power supply area is broad, power consumption is not concentrated, there are unreasonable power grid structure, large day and night load changes, large seasonal load changes, uneven load distribution, large power supply radius, and long feeder lines. Insufficient reactive power compensation. With the improvement of people's living standards and the popularization and application of household smart appliances, the three-phase unbalance and low power factor of the low-voltage power grid are becoming more and more serious, resulting in large line losses, low terminal voltage, reduced transformer output and poor power supply quality. The existence of these problems has caused long-term problems of high power transmission loss in the entire low-voltage power grid.
In view of the above problems, there is a zero transition process dynamic reactive power compensation box type substation, which comprises an outer casing, and a high pressure chamber, a low pressure chamber and a transformer chamber housed in the outer casing; wherein the high pressure chamber comprises a high voltage inlet cabinet The metering cabinet and the high-voltage outlet cabinet; the low-voltage room comprises a low-voltage inlet cabinet, a low-voltage reactive power compensation cabinet and a low-voltage outlet cabinet, and a zero-transition process dynamic reactive power compensation device is arranged in the low-voltage reactive power compensation cabinet. The substation of the utility model adopts a zero-transition process dynamic reactive power compensation technology, and solves the problems of overcurrent, overvoltage and capacitor decay speed caused by overvoltage, the failure rate of the compensation device is low, the quality of the power grid is improved, and real-time dynamics are realized. Switching, but the layout of the high-voltage room, low-voltage room and transformer room of the utility model is not reasonable enough, and there is a problem of large volume, and the reactive power compensation of the utility model can only achieve stepwise inductive load compensation with low precision, for three Phase imbalance management, capacitive load compensation and high-order harmonic filtering are powerless, and there is a problem of poor power supply reliability.
Our company provides a box-type transformer to solve the problem that the existing technology can only achieve stepless inductive load compensation with low precision. For three-phase unbalanced control, capacitive load compensation and high-order harmonic filtering are powerless. Poor power supply reliability. The box type transformer comprises a high voltage power distribution room, a transformer room and a low voltage power distribution room, the high voltage power distribution room, the transformer room and the low voltage power distribution room are arranged in a horizontal direction, and the low voltage power distribution room comprises a measuring cabinet arranged in the horizontal direction. The total cabinet, the power quality comprehensive compensation cabinet and the outlet cabinet, and the power quality comprehensive compensation cabinet are provided with a power quality comprehensive compensation device for realizing three-phase unbalanced treatment and power compensation. This box type transformer can improve the reliability of power supply.
Compared with the prior art, the box type transformer has the following advantages:
1. This box-type transformer replaces the reactive power compensation device in the original box-type transformer with the power quality comprehensive compensation device. Through this design, the box-type transformer can simultaneously realize voltage regulation, metering, protection, power distribution, and three-phase. Unbalanced treatment, reactive power compensation, high-order harmonic filtering and other functions, and through the box-type transformer, linear compensation can be realized by inductive reactive power and capacitive reactive power, which effectively improves the reactive power compensation accuracy.
2. This box type transformer has the advantages of fast response speed, high compensation precision, good energy saving effect, strong protection function and long service life.
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