CN2328045Y

CN2328045Y - High voltage reactive compensation intellectual device

Info

Publication number: CN2328045Y
Application number: CN 97251563
Authority: CN
Inventors: 范振亭; 张留山
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-12-31
Filing date: 1997-12-31
Publication date: 1999-07-07
Anticipated expiration: 2007-12-31

Abstract

The utility model relates to a high voltage reactive compensation intelligent device. The utility model can be widely used for 6KV-10KV lines and substations. The utility model can be matched with high voltage compensation capacitors to carry out automatic compensation for the reactive power of electric lines can equipment. The utility model is characterized in that A and C phases voltage transformer PT are connected with a sampling voltage U which is connected with a voltage amplifier V which is connected with a microprocessor CP; the output of B phase current transformers CT1 and CT2 is connected with a current amplifier I which is connected with the microprocessor CP, the output of the microprocessor CP is connected with a tripping outlet F and a closing outlet M, the tripping outlet F is connected with a tripping executing element D, the closing outlet M is connected with a closing executing element L, the tripping executing element D and the closing executing element L control a high voltage executing switch K which is connected with a high voltage compensation capacitor C, and the output of a potential transformer PT is connected with a power supply and a voltage stabilization E.

Description

The high-pressure reactive compensation intelligent apparatus

The utility model relates to a kind of automatic switching device of high-tension line reactive-load compensation capacitor, particularly a kind of high-pressure reactive compensation intelligent apparatus.This device adopts high pressure integral structure, it can extensively be used on the 6-10KV circuit and electric substation in, its cooperates high pressure compensation capacitor, and the reactive power with electric line and equipment is compensated automatically.Having broken the high-tension line reactive-load compensation can not be by the problem of optimum value configuration.

The reactive-load compensation of high-tension line for a long time mainly be the way that adopts fixed compensation, and fixed compensation has a lot of indeterminable problems.It is not enough as follows that their exist: 1, can be in time not out of service during overtension, and can burn out capacitor or set off an explosion.2, can not be by the compensation of the optimum value of circuit, because of the size of line load and power factor is a time to time change.If the idle amount by busy hour compensates, when reducing, load can produce the over-compensation phenomenon.General offset all designs than the underrun value.3, because the offset deficiency, when high load capacity voltage drop big, influence the power supply quality of circuit.4, owing to do not reach the The optimal compensation value, power savings is not obvious.If 5 when causing phase shortage because of power fail or other factors, the capacitor two-phase operation, asterism displacement in can producing influences quality of voltage.

The purpose of this utility model is a kind of high-pressure reactive compensation intelligent apparatus of developing at above deficiency, it is made up of three parts, the one, the quiet moving contact of this device adopts the knife-like switch form, the cooperative mechanical gear train and contract can spring effect, be subjected to the adhesive of electromagnet and reach deciliter function of switch; The 2nd, control section adopts the integrated electronic circuit, single-chip microcomputer intelligence control system, and relevant defence program function; The 3rd, sample circuit element current mutual inductor CT and voltage transformer pt all design in switch inside.Divide-shut brake power supply and electronic circuit working power all have voltage transformer pt to supply with.This three part has been formed integral structure, is contained in the heavy wool formula casing.

The utility model is achieved in that the high-pressure reactive compensation intelligent apparatus comprises mechanical part and circuit structure part: wherein, the structure of mechanical part is, three-phase ac power supply A, B, C are connected on respectively on A phase input end 7, B phase input end 8, the C phase input end 18 mutually, A phase input end 7 and C input end 18 mutually are connected on the A, C phase static contact 16 of switch through porcelain vase, on the screw of static contact 16, extension line is arranged, be connected on the voltage transformer (VT) 3, B phase power supply is connected on the B phase static contact 16 through B phase input end 8 summation current transformers 4; The structure of circuit part is, A, the voltage transformer pt of C phase inserts sampled voltage U, its output meets voltage amplifier V, voltage amplifier V meets microprocessor CP, the output of B phase current mutual inductor CT1 and CT2 meets current amplifier I, the output of current amplifier I meets microprocessor CP, the output of microprocessor CP meets separating brake outlet F and the outlet M that closes a floodgate, separating brake outlet F meets separating brake executive component D, the outlet M that closes a floodgate engages lock executive component L, separating brake executive component D, combined floodgate executive component L control high pressure is carried out K switch, and high pressure is carried out K switch and met high pressure compensation capacitor C, and the output of voltage transformer pt meets power supply and voltage stabilizing E.

Good effect of the present utility model is: this product structure is reasonable, and volume is little, and is in light weight, and has perfect defencive function.High-pressure reactive compensation intelligent apparatus reliable in action, easy for installation, need not the corresponding phase wiring.This device is set with four gears and 100,200,300,400A by line load and capacitance.This installs no external power supply, can install easily on the line and the reactive-load compensation capacitor matching running.This device does not need field adjustable owing to adopted intellectualizing system, just can reach good operational effect.This device is provided with automatic discharge loop, has guaranteed maintenance personal's safety.

Description of drawings.

Fig. 1 is a structural front view of the present utility model.

Fig. 2 is a structure side view of the present utility model.

Fig. 3 is a circuit block diagram of the present utility model.

Fig. 4 is primary circuit figure of the present utility model.

Fig. 5 is circuit theory diagrams of the present utility model.

Wherein

1, lower box 2, electronic circuit board 3, voltage transformer (VT) 4, current transformer

5, divide-shut brake pointer 6, upper box 7, A phase input end 8, B phase input end

9, terminal box 10, tripping electromagnet 11, close/open machine 12, making electromagnet

13, oil level pin 14, capacitor 15, moving contact 16, static contact

17, contracting can spring 18, C imports 19 mutually, B exports mutually

The utility model is described in further detail below in conjunction with accompanying drawing.

The high-pressure reactive compensation intelligent apparatus acts on 10KV, the 50H three-phase ac power cord road, is used for the switching compensation capacitors, and the structure of this device is:

As shown in Figure 1, 2, three-phase ac power supply A, B, C are connected on A mutually respectively and assist mutually on end 7, B phase input end 8, the C phase input end 18, A phase input end 7 and C input end 18 mutually are connected on the A, C phase static contact 16 of switch through porcelain vase, on the screw of static contact 16, extension line is arranged, be connected on the voltage transformer (VT) 3, B phase power supply is connected on the B phase static contact 16 through B phase input end 8 summation current transformers 4; When switch is in "on" position, three-phase supply is connected by each phase static contact 16 and moving contact 15, dynamic static joint 15 be connected A phase, C mutually and B export mutually on 19 the outlet porcelain vase and insert the compensation condenser group, be connected with compensation condenser by A phase input end 7, B phase input end 8 and C phase input end 18 again, make compensation condenser connecting system power supply; This switch is the Electromagnetically-operating form, separating brake is finished by electromagnet 10, when switch is gate-dividing state, electromagnet 10 adhesives drive close/open machine 11 through connecting rod, connect moving contact 15 actions by close/open machine 11, in moving

contact

15,16 open whiles of static contact, drive is contracted and can be drawn back by spring 17, and pinned by the rocking arm of making electromagnet 12 this moment, and switch is in gate-dividing state; During combined floodgate, behind the coil electricity of making electromagnet 12, rocking arm is threaded off, and contracts to act on by spring 17, drives the rocking arm action, and moving contact 15 and static contact 16 are connected.

As shown in Figure 4, the primary connection principle of this device is on three-phase supply load circuit, rolls off the production line and inserts this device, connects voltage transformer pt at A, C phase input end, and B seals in current transformer CT mutually, at the outlet access three-phase reactive-load compensation capacitor C of K switch; In the detection signal access controller of the detection signal of current transformer CT and voltage transformer pt, controller is according to the detection signal of current transformer CT and voltage transformer pt, the size of identification power factor, and drive the divide-shut brake relay, drive divide-shut brake electromagnet 10 and 12 by relay.

As shown in Figure 3, the detection electric current of B phase current mutual inductor CT1 becomes little current signal again after current amplifier I amplifies, in the input microprocessor CP through current transformer CT2; A, C phase voltage mutual inductor PT input 10KV power supply goes out voltage detection signal, circuit board operating voltage and divide-shut brake power supply at secondary acquisition; Voltage detection signal is after sampled voltage U sampling, after voltage amplifier V amplification, be added in the microprocessor CP, after microprocessor CP handles, the size of difference power-take-off factor, when power factor was low, switching signal drove the outlet M that closes a floodgate, drive combined floodgate executive item L action, make K switch be in "on" position; When power factor was high, sub-gate signal drove separating brake outlet F and drives separating brake executive component D action, makes K switch be in gate-dividing state, and E is the rectifying voltage regulator of circuit board; Under the action of separating brake executive component D and combined floodgate executive component L, drive the K switch action, thereby make compensation condenser C drop into and withdraw from according to the power factor height of circuit, reached the robotization of circuit reactive-load compensation.

Shown in Fig. 1,2,3,4,5.The switching of this device is that the height according to the line load power factor moves, this value is the measured value according to voltage transformer pt summation current transformer CT, the input electronic circuit amplifies, calculates, set working value according to result of calculation, promote executive component J1, J2 then, drive the coil of tripping electromagnet 10, making electromagnet 12, tractive magnet drives mechanical mechanism and makes the K switch action.

As shown in Figure 5, when supply line's running status, current transformer CT1 has individual electric current, by being added in amplifier IC2D after the current transformer CT2 unsteady flow, after amplifier IC2D amplification, add IC3C and after IC3B carries out shaping, amplifies, in R11 is added in microprocessor IC1, through R2 as current phase signal.Another road is added in IC3A and IC3D through R3 carries out shaping, amplifies in R12 adds microprocessor IC1, and microprocessor IC1 output signal again feeds back to IC3D through R13 and triode, does phase place and adjusts automatically.The current potential of the coil 2 of voltage transformer pt, adds in the IC1 microprocessor by R9, R15 output through adding after R6, the R7 dividing potential drop on the IC2A, is voltage phase signal; Another road adds on IC2B and the IC2C, in R4 is added in microprocessor IC1, as the overvoltage protection signal through R8.The coil 3 of voltage transformer pt is that divide-shut brake promotes power supply (220V) through being added in after the rectification on G and the separating brake outlet F, and J1 and J2 control action are arranged.The 15V voltage of coil 4 ends of voltage transformer pt through the B rectification after 12V and 5V voltage stabilizing, supply circuit plate operating voltage.S is the microprocessor clock circuit.After current signal and voltage signal add microprocessor 1C1, according to the operation result and the artificial value of establishing, promotion J1, the J2 actuating of relay, thus reached the effect of intelligent operation/cutting reactive-load compensation capacitor C.

Four, working routine:

1, when intelligent switch cooperation compensation condenser, normal operation input after delaying time 5 minutes behind the access power supply has sufficient phase-detecting, measure, contract energy and stabilization like this.

2, at 10% o'clock of the line voltage distribution overrate, phase shortage and low 30% when following of definite value that load on are arranged, intelligent switch is failure to actuate, and compensation condenser C can not be put into operation.

3, be lower than 0.85 when following in the circuit power factor, switch motion, the input compensation capacitor compensates the idle of circuit.

4, in compensation condenser puts state into operation, if 10% and power factor of voltage overrate surpass at 1 o'clock, switch motion, excision compensation condenser.Their action all has the time-delay about 1 minute, for the influence that prevents the line load fluctuation designs.

5, have an accident for preventing that oil from reducing, intelligent switch stops action automatically after action 500 times, need manually safeguard change oil after, put into operation again.

6, the divide-shut brake of switch all has time-delay, mainly be guarantee charging contract can and compensation condenser discharge time.

7, for preventing intelligent switch repetitive operation, after dropping into as capacitor, power factor is also below 0.85, withdraw from capacitor after, power factor is also more than 1, voltage still is that 10% o'clock of overrate is provided with memory function, repetitive operation is once after delaying time.

Claims

1, a kind of high-pressure reactive compensation intelligent apparatus comprises mechanical part and circuit structure part, it is characterized in that:

The structure of mechanical part is, three-phase ac power supply A, B, C are connected on respectively on A phase input end (7), B phase input end (8), the C phase input end (18) mutually, A phase input end (7) and C input end (18) mutually are connected on the A, C phase static contact (16) of switch through porcelain vase, on the screw of static contact (16), extension line is arranged, be connected on the voltage transformer (VT) (3), B phase power supply is connected on the B phase static contact (16) through B phase input end (8) summation current transformer (4);

The structure of circuit part is, A, the voltage transformer pt of C phase inserts sampled voltage U, its output meets voltage amplifier V, voltage amplifier V meets microprocessor CP, the output of B phase current mutual inductor CT1 and CT2 meets current amplifier I, the output of current amplifier I meets microprocessor CP, the output of microprocessor CP meets separating brake outlet F and the outlet M that closes a floodgate, separating brake outlet F meets separating brake executive component D, the outlet M that closes a floodgate engages lock executive component L, separating brake executive component D, combined floodgate executive component L control high pressure is carried out K switch, and high pressure is carried out K switch and met high pressure compensation capacitor C, and the output of voltage transformer pt meets power supply and voltage stabilizing E.