Control method of intermediate relay capable of resisting alternating current, being started at high power and running at low power consumption

Abstract

A control method of an anti-alternating-current, high-power-starting and low-power-consumption operation intermediate relay comprises the steps that a power resistor is connected in parallel to a first relay loop to achieve high-power starting; the second relay coil loop or / and the third relay coil loop is controlled through the input voltage sampling circuit, the passive precise action parameter control chip and the output of the passive precise action parameter control chip, the transmission ratio of the sampling loop can be flexibly set through parameter setting, and the transmission ratio of the sampling loop can be flexibly set only by changing the resistance value of a sampling resistor. And the requirements of different voltage level action values can be met. The input voltage is divided through a voltage division circuit and input to a VT port of the passive precise action parameter control chip, when the voltage of the VT port is larger than a set value, a GT port is driven to output a PWM signal to drive an MOSFET to be conducted, after the MOSFET is conducted, a negative power source is provided for a relay coil, and a second relay and a third relay act.

Description

technical field [0001] The present invention relates to the setting, control method and device for precise control of action value, high power start and low power consumption relay. In particular, it is about the control of relay operating voltage, the control of relay operating time, the control of anti-AC do not move, the control of high-power starting, the power consumption reduction operation after the relay is started, and the protection of the relay control circuit. Background technique [0002] In the power system, the malfunction of the protection and measurement and control system often occurs. The reasons for the malfunction are many. One is that the modern large power grid requires a very short time for switching value judgment; device, the action power is small; third, because the construction scale of the plant and station system is getting larger and larger, the cable is too long, and the distributed capacitance of the cable is also getting larger and larger, a...

AI Technical Summary

Problems solved by technology

The characteristics of this type of interference are: high frequency, intermittent interference, and low recurrence rate

[0005] The second source of interference: Due to the capacitance distribution characteristics of the cable, the AC voltage is often coupled into the DC system through the capacitance

At present, before each manufacturer leaves the factory, only the upper limit of the relay is detected, that is, the reliable operating voltage of the relay, and the lower limit is not detected, resulting in a wide operating range of the relay and a large degree of dispersion.

At present, before the product goes online, the complex intelligent system first uses the complex intelligent system to screen the action range of the relay before processing, and then match the action parameters with the voltage dividing resistor. After processing, there are still cases where the action value does not meet the standard. For unqualified The product will perform secondary action parameter matching, that is, replace the voltage dividing resistor, or even the relay, until the product is qualified, resulting in a large quality bottleneck in the relay

[0013] e) For occasions where the interference source is solved by prolonging the action time, the complex intelligent system currently used first screens the action range of the relay before processing, and then matches the action parameters with the voltage dividing resistor, and then selects the capacitor to be connected in parallel with ZJ1 The two ends of the first relay are screened by adjusting the capacitance value. After processing, the action time still does not meet the standard.

Most of the defective products screened out are replacement capacitors.

[0014] Leading to a large amount of waste of raw materials and increased labor costs for enterprises

[0015] figure 2 In the basic principle of the anti-jamming relay, therefore, the optimization of the control circuit of the anti-jamming relay, it is necessary to precisely control the action parameters of the relay, but the auxiliary power supply and the microprocessor cannot be increased, which has become the key problem of the industry, and at the same time, the power consumption is reduced and the green Operation has gradually become a hot spot in the industry

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