Combined single-phase/three-phase alternating current voltage stabilizer based on digital circuit control

Abstract

The invention relates to a multi-single-phase / three-phase alternating current voltage stabilizer based on digital circuit control. The voltage stabilizer comprises: an input terminal is connected with three compensation transformers of a power grid, an output terminal is connected to an input terminal of electrical equipment via series connection of primary windings of the three transformers, and secondary winding terminals of the three transformers are connected to an output voltage terminal via 8 bidirectional thyristors, a TR4 transformer at an input voltage side provides real-time voltage detection signals, alternating current effective value detection is conducted via a 12-bit high-precision A / D converter, single-phase alternating current work voltage is monitored in real time, obtained high 9-bit digital signals and a set coding amount value are compared, the 8 bidirectional thyristors are determined, combined, and triggered via a decoding driving circuit according to a hardware logic programming regulation, the employed group number of secondary windings of the transformers and the voltage direction are changed via different combinations of turn-on and turn-off of the bidirectional thyristors, different compensation combinations for measuring the voltage at one step are finally achieved, and the output voltage is guaranteed to be stabilized in a given voltage range.

Description

technical field [0001] The invention belongs to the field of voltage stabilizer circuits, in particular to a combined single-phase / three-phase AC voltage stabilizer based on digital circuit control. Background technique [0002] At present, although the power grid facilities are updated rapidly, the quality of power supply in large and medium-sized cities can basically meet the needs of users, but in some small cities and vast rural areas, due to the contradiction between the old power grid facilities and the rapid increase in power consumption, users The power quality is very unstable, and sometimes it will directly affect the normal use of individual electrical appliances or bring harm to the use of electrical equipment. [0003] At present, there are many types of voltage regulators on the market, but each has its own advantages and disadvantages, and the specific environment it is applicable to also has its own bias. Therefore, a unique and superior performance voltage r...

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Problems solved by technology

[0002] At present, although the power grid facilities are updated rapidly, the quality of power supply in large and medium-sized cities can basically meet the needs of users, but in individual small cities and vast rural areas, due to the contradiction between the old power grid facilities and the rapid increase in power consumption, users The power quality is very unstable, and sometimes it will directly affect the normal use of individual electrical appliances or bring harm to the use of electrical equipment

[0003] At present, there are many types of voltage regulators on the market, but each has its own advantages and disadvantages, and the specific environment it is applicable to also has its own bias. Therefore, a unique and superior performance voltage regulator has been developed to improve user Terminal power quality is very necessary

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