High-voltage harmonic suppression program controller

Abstract

The invention discloses a high-voltage harmonic suppression program controller. The high-voltage harmonic suppression program controller is mainly characterized by comprising a harmonic voltage measurement and control unit THU, a harmonic current measurement and control unit THI, a high-voltage load A-phase circuit IA, a second conjunction gate circuit IC2-2, a switching execution circuit, a leakage protection circuit, an over-voltage protection circuit and an under-voltage protection circuit, wherein the harmonic voltage measurement and control unit THU is connected with the input end of the second conjunction gate circuit through a second diode D2; the harmonic current measurement and control unit THI is connected with the harmonic voltage measurement and control unit THU; the high-voltage load A-phase circuit IA is connected with the harmonic current measurement and control unit THI, one end of a switch K0 and the input end of the circuit IC2-2; the other end of the K0 switch is connected with the negative electrode of the second diode D2 through a fifth diode D5, and the output end of the second conjunction gate circuit is connected with the switching execution circuit. The high-voltage harmonic suppression program controller can ensure a harmonic wave generated by a device is reduced within the national standard when electricity is used in each field, does not inject the harmonic wave into a power grid and also ensures the power supply quality of the power grid.

Description

technical field [0001] The invention relates to a device for measuring and displaying electrical variables such as voltage and current in the power grid, and further adjusting the device, especially a high-voltage harmonic suppression program controller. In the international patent classification table, The invention should be classified into subclass G01R. Background technique [0002] At present, the performance and indicators of the existing devices are still difficult to meet the requirements of national standards and user satisfaction. For some reason, the neutral point displacement often occurs will lead to sudden overvoltage or undervoltage of the voltage, which will damage the power triode; Or, if the single-phase leakage of the compensation equipment causes breakdown to the ground due to excessive harmonics, the ungrounded phase voltage will rise close to the line voltage. If it is not dealt with in time, it will bring serious consequences. Contents of the inventi...

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Problems solved by technology

[0002] At present, the performance and indicators of the existing devices are still difficult to meet the national standards and the requirements of customer satisfaction. For some reason, the neutral point displacement often occurs will lead to sudden overvoltage or undervoltage of the voltage, which will damage the power triode; Or, if the single-phase leakage of the compensation equipment causes breakdown to the ground due to excessive harmonics, the ungrounded phase voltage will rise close to the line voltage. If it is not dealt with in time, it will bring serious consequences

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