Dynamic voltage two-way stepless regulating transformer

Abstract

The invention relates to a dynamic voltage two-way stepless regulating transformer comprising a microcontroller, a dynamic voltage two-way regulator DV, a main transformer T1 and a series compensation transformer T2. Network input voltage is subjected to signal conversion with primary voltage of the main transformer T1 and then inputted into the microcontroller; the microcontroller outputs a control signal to the dynamic voltage two-way regulator DV; the output of the dynamic voltage two-way regulator DV is connected with a primary of the series compensation transformer T2; a secondary of the series compensation transformer T2 is in the series connection with network voltage to be connected with a primary of the main transformer T1. In this way, only drop value of the main transformer input voltage is regulated and compensated, and the rest voltage of the main transformer is not required to be supported, leading to high cost performance; the series compensation transformer is connected with the main transformer, rather than being in the series connection with a main loop of a power supply system of the main transformer, thus an IGBT (insulated gate bipolar transistor) power device low in withstand voltage is available; voltage with amplitude constantly adjusted can be generated by inverter voltage of the dynamic voltage two-way regulator, and accordingly stepless voltage adjustment is facilitated.

Description

technical field [0001] The invention relates to a power distribution transformer, in particular to a dynamic voltage bidirectional stepless regulating transformer. Background technique [0002] As the power capacity of the power grid voltage changes at any time, the primary side voltage of the distribution transformer fluctuates greatly, resulting in unstable voltage on the secondary side of the distribution transformer, thereby affecting the quality of power consumption of users. Studies have shown that the voltage drop problem has become one of the power quality problems that affect the normal and safe operation of many electrical equipment. In modern industrial production, voltage drop will cause the manufacturer's product quality to decline, and even cause the production process of the whole factory to be interrupted, resulting in huge economic losses. Therefore, how to suppress the interference of voltage dips to power users and improve the dynamic power quality of pow...

AI Technical Summary

Problems solved by technology

[0005] a. When switching between different contacts, since the thyristor is not turned off immediately, there is a circulating current between the contacts, improper control, and it is easy to burn the device;

[0006] b. Since the thyristor is a semi-controlled device, the response speed is limited, and it is difficult to improve it again, usually more than 10 milliseconds;

[0007] c. Since the thyristor is directly connected in series in the main circuit, the withstand voltage value is relatively high, and the device capacity is relatively large, resulting in an increase in cost;

[0008] d. This device realizes stepped pressure regulation, and the precision of pressure regulation is limited

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