Voltage regulator specialized for low voltage control

Abstract

The invention discloses a voltage regulator specialized for low voltage control. A control unit comprises a digital signal processor, an input voltage mutual inductor, an output voltage mutual inductor and a relay driving unit. The input voltage mutual inductor, the output voltage mutual inductor and the relay driving unit are electrically connected with the digital signal processor. The relay driving unit is connected with a relay. An input terminal bar is connected with a power supply input cable, the input end of the input voltage mutual inductor, the incoming wire of the secondary coil of a ring transformer and the working power supply of the control unit. An output terminal bar is connected with a power supply output cable and the input end of the output voltage mutual inductor. The power supply input cable is connected with the ring transformer through the relay. The problem of low voltage control of a rural power grid can be effectively solved by the voltage regulator specialized for low voltage control.

Description

technical field [0001] The invention relates to the field of electrical equipment, in particular to a special voltage regulator for low voltage control. Background technique [0002] With the rapid development of our country's national economy, people's living standards continue to improve, especially in the vast rural areas, people's lives are getting better and better, new household appliances and agricultural machinery are used more and more widely, and the demand for rural electricity is also growing rapidly. A large number of single-phase equipment has been put into use, which has caused a sharp increase in the load of the distribution station area, and the capacity of the main distribution transformer is insufficient; the power supply radius of the distribution station area is too long, the wire diameter is too thin, and the active power loss is too large; the reactive power of the line is seriously undercompensated, causing The terminal voltage loss is too large; the ...

AI Technical Summary

Problems solved by technology

[0006] 3. The low-voltage line has a thin path and a small delivery capacity area

[0007] 4. Areas where power distribution transformation is difficult and need short-term and medium-term low-voltage treatment in an emergency

[0010] 1. Reactive power compensation can reduce the apparent current and reduce the voltage drop of the line, thereby indirectly achieving the purpose of boosting the voltage. Therefore, it is greatly affected by the power factor of the low-voltage line and has great limitations.

[0011] 2. Directly step up the voltage through the autotransformer. Under the same capacity, the device has many consumables, heavy weight and large volume. Not only the cost is high, but also the installation cost is greatly increased due to the heavy weight.

[0012] 3. The inside of the electronic voltage stabilizer is mainly a power electronic device, which is not suitable for use in harsh outdoor environments (high temperature, high humidity), and the capacity is difficult to exceed 3kVA, and the price is expensive

[0013] 4. By increasing the output voltage of the distribution transformer in the station area, the low voltage problem of users near the station area can be solved, but on the other hand, it is easy to cause a high voltage at the head end, and on the other hand, it cannot solve the low voltage caused by the too long power supply radius question

[0014] 5. The step-up comparison of the new distribution transformer: the method of extending the 10kV line and adding a new distribution transformer can certainly solve the problem of low voltage, but the cost will be very high

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