CN208623337U - Low-voltage idle dynamic compensator - Google Patents

Abstract

The utility model relates to a kind of low-voltage idle dynamic compensators, including first, second, third compensates circuit, described first, second, it is parallel with one another that third compensates circuit, described first, second, it includes the breaker being serially connected that third, which compensates circuit, mutual inductor, contactor, reactor and capacitor, lightning rod is provided between the breaker and mutual inductor, there is switching to switch between contactor and reactor in third compensation circuit, the low-voltage idle dynamic compensator further includes the controller being connected with power grid, the switching switch is connect with trigger circuit, the controller is connect with trigger circuit, the computer of the controller is connected with display, the fling-cut switch is two-way controllable switch, the mutual inductor is current transformer, it include zero cross fired module in the trigger circuit.Repacking, which is set, makes three-phrase burden balance, improves power quality, improves the production work efficiency of user, improves product quality and reduces energy consumption.

Description

Low-voltage idle dynamic compensator

Technical field

The utility model relates to power system device technical fields, and in particular to a kind of low-voltage idle dynamic compensator.

Background technique

Currently, the power grid in China, especially vast rural power grids, generally existing power factor is lower, grid line loss compared with Big situation.The main reason for leading to this phenomenon is that numerous inductive load electrical equipment designs falls behind, and power factor is lower.Than The 70% of whole generated energy are accounted for if the electric energy that the motor in China consumes, and due to design and use etc., I The power factor of state's motor is often lower, typically about Φ=0.7 cos, in this case, using reactive compensation energy conservation skill Art, to improve power quality and excavate power grid potentiality be it is very necessary, countries in the world are all using reactive compensation as Electric Power Network Planning Important component.

Domestic and international low-voltage reactive compensator is mainly by controller, knife-like switch, fuse, contactor, electrothermal relay, electric power electricity The composition such as container, indicator light, it is primarily present, and the big, switch that shoves, the capacitor service life is short, reactive compensation reaction is slow, and volume is big, accounts for The drawbacks such as ground is big, consumptive material is more, power consumption is big, wiring is more, heavy, poor reliability, is unable to teletransmission, and the degree of automation is low.Existing packet Include the first phase splitting compensation circuit parallel with one another, the second phase splitting compensation circuit, third phase splitting compensation circuit；First phase splitting compensation returns Road, the second phase splitting compensation circuit, third phase splitting compensation circuit include the breaker being sequentially connected in series, mutual inductor, contactor, reactance Device and capacitor；Lightning rod is connected between breaker, mutual inductor；Contactor and reactance in third phase splitting compensation circuit There is switching to switch between device；Further include with power grid be connected controller, connect controller with switch switch trigger circuit, connect In the computer and touch display of controller.When the Reactive Compensation Device is applied to power distribution network, such as electric railway, smelting The industrial users such as gold can effectively control reactive power, and increase power factor reduces voltage influence caused by nonlinear-load And harmonic wave interference, improve the production work efficiency of user.But usually will appear in distribution system containing harmonic wave, these harmonic waves are not only It pollutes power grid and threat is produced to the normal operation of equipment, reduce the utilization rate of equipment, increase power supply investment, damage Quality of voltage, reduces the physical life of equipment, considerably increases line loss.

Utility model content

The purpose of this utility model is: providing a kind of low-voltage idle dynamic compensator, enables to balancing the load, improves Quality reduces energy consumption.

In order to achieve the above purposes, the technical solution adopted by the utility model is:

A kind of low-voltage idle dynamic compensator, including the first, second, third compensation circuit, described first, second, the Three compensation circuits are parallel with one another, and first, second, third compensation circuit includes the breaker being serially connected, mutual inductor, connects Tentaculum, reactor and capacitor are provided with lightning rod, connecing in third compensation circuit between the breaker and mutual inductor There is switching to switch between tentaculum and reactor, the low-voltage idle dynamic compensator further includes the controller being connected with power grid, The switching switch is connect with trigger circuit, and the controller is connect with trigger circuit, the computer of the controller and display Device connection, the switching switch are two-way controllable switch, and the mutual inductor is current transformer, include in the trigger circuit Zero trigger module.

Compared with prior art, the technical effect that the utility model has are as follows: the utility model is applied to power transmission network can be fast Speed changes its idle power output, provides dynamic reactive power supply, regulating system voltage for electric system；Supply voltage is compensated to one Reasonable level increases the ability to transmit electricity of route and reinforces the damping to low-frequency oscillation and inhibit synchronized oscillation；In addition, this is practical Novel by dynamic regulation idle power output, caused busbar voltage changes when inhibiting to fluctuate impact load operation, is conducive to transient state Voltage restores, and provides the maintenance level of system voltage.When the utility model is applied to power distribution network, such as electric railway, metallurgy Industrial user can effectively control reactive power, and it is harmonious to reduce voltage influence caused by nonlinear-load for increase power factor Wave interference makes three-phrase burden balance, improves power quality, improves the production work efficiency of user, improves product quality and reduces energy Consumption.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of low-voltage idle dynamic compensator.

Specific embodiment

In conjunction with Fig. 1, the utility model is further described:

A kind of low-voltage idle dynamic compensator, including the first, second, third compensation circuit 10,20,30, described first, Second, third compensation circuit 10,20,30 is parallel with one another, and first, second, third compensation circuit 10,20,30 includes phase Mutual concatenated breaker 40, mutual inductor 50, contactor 60, reactor 70 and capacitor 80, the breaker 40 and mutual inductor 50 Between be provided with lightning rod 90, have switching switch 31 between the contactor 60 and reactor 70 in third compensation circuit 30, The low-voltage idle dynamic compensator further includes the controller 100 being connected with power grid, the switching switch 31 and trigger circuit 130 connections, the controller 100 are connect with trigger circuit 130, and the computer 110 and display 120 of the controller 100 connect It connects, the switching switch 31 is two-way controllable switch, and the mutual inductor 50 is current transformer, is wrapped in the trigger circuit 130 Include zero cross fired module；

Voltage, electric current, reactive power and the power factor of the utility model real-time follow-up load, pass through computer 110 are analyzed, and calculate lacked reactive power, and be compared with preset numerical value, automatically selecting can reach best The compensation capacity of compensation effect simultaneously issues instruction, judges the turn-on instant of bidirectional triode thyristor by zero cross fired module, complete quickly, Shock-free investment capacitor.

Claims (1)

1. a kind of low-voltage idle dynamic compensator, it is characterised in that: including first, second, third compensation circuit (10,20, 30), first, second, third compensation circuit (10,20,30) is parallel with one another, first, second, third compensation circuit (10,20,30) include breaker (40), mutual inductor (50), contactor (60), reactor (70) and the capacitor being serially connected (80), it is provided with lightning rod (90) between the breaker (40) and mutual inductor (50), in third compensation circuit (30) There is switching switch (31) between contactor (60) and reactor (70), the low-voltage idle dynamic compensator further includes and power grid Connected controller (100), the switching switch (31) connect with trigger circuit (130), the controller (100) and triggering electricity Road (130) connection, computer (110) and display (120) connection of the controller (100), the switching switch (31) are Two-way controllable switch, the mutual inductor (50) are current transformer, include zero cross fired module in the trigger circuit (130).