485 communication control type intelligent reactive compensation controller

Abstract

Provided is a 485 communication control type intelligent reactive compensation controller. The invention relates to a 485 communication control type intelligent reactive compensation controller and provides a low-voltage three-phase four-wire intelligent reactive power automatic compensation controller. The 485 communication control type intelligent reactive compensation controller comprises a power supply circuit and a 485 communication circuit, a computer terminal and a GPRS module. The 485 communication control type intelligent reactive compensation controller further comprises a power factor measuring circuit, a compensation capacitor switching circuit, an infrared communication circuit and a communication control CPU which are connected with a main control CPU. The communication control CPU is connected with the 485 communication circuit, the 485 communication circuit is connected with the computer terminal, and the computer terminal is connected with the GPRS module through a 485 serial port. The 485 communication control type intelligent reactive compensation controller has the advantages of high intelligent level, flexible use, complete functions, reliable quality, good timeliness, reliability, capacity scalability and maintainability, and easy standardized and normalized management.

Description

technical field [0001] The invention relates to a remote monitoring low-voltage power reactive power compensation device in the technical field of power supply, in particular to a 485 communication-controlled intelligent reactive power compensation controller. Background technique [0002] At present, in the known reactive power (power factor) compensation controller, a control circuit is connected to a set of low-voltage power compensation capacitors with fixed specifications. This kind of compensation controller switches according to the power factor. , the following situation may occur: after putting in several sets of capacitors, the power factor is a little lower than the preset value, and after putting in another set of capacitors, the power factor is overcompensated. If a smaller compensation capacitor is used, the power consumption peak Sometimes even if all of them are cast, the compensation may not be enough, and good reactive power compensation cannot be a...

AI Technical Summary

Problems solved by technology

[0002] At present, in the known reactive power (power factor) compensation controller, a control circuit is connected to a set of low-voltage power compensation capacitors with fixed specifications. This kind of compensation controller switches according to the power factor. , the following situation may occur: after putting in several sets of capacitors, the power factor is a little lower than the preset value, and after putting in another set of capacitors, the power factor is overcompensated. If a smaller compensation capacitor is used, the power consumption peak Sometimes even if all of them are put in, the compensation may not be enough, and it is impossible to achieve good reactive power compensation.

And the on-site voltage data can only be sampled one way or without sampling. When the voltage is too high, the capacitor cannot be cut off, and the loss under the overvoltage of the capacitor cannot be protected; the known reactive power compensator cannot automatically cool down at high temperatures; The power compensator can only be used as a separate device, and it cannot realize remote viewing of data and operating conditions. It has the disadvantages of low intelligence, inability to realize remote monitoring, poor flexibility, poor reliability, short capacitor life and poor capacitor scalability.

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