CN2607690Y

CN2607690Y - Integrated high-voltage wattless dynamic compensator on column

Info

Publication number: CN2607690Y
Application number: CN 02292526
Authority: CN
Inventors: 金黎; 马金明; 张志成; 浮建勇; 刘燕
Original assignee: Xi'an Senbao Electric Engineering Sbec Co ltd
Current assignee: Xi'an Senbao Electric Engineering Sbec Co ltd
Priority date: 2002-12-26
Filing date: 2002-12-26
Publication date: 2004-03-24
Anticipated expiration: 2012-12-26

Abstract

The utility model discloses an integral pole-mounted dynamic high-voltage reactive compensation device, which comprises a box body in which a wall bushing is arranged. The three-phase AC power supply, including phase A, B and C, is led into the box via the wall bushing and connected with a voltage transformer built in the box body, and flows through a current transformer, the voltage transformer and the current transformer sending voltage and current signals to the controller arranged in the box body; one end of the fuse is connected with the high-voltage circuit while the other end with the incoming end of the vacuum contactor, and the outgoing end of the vacuum contactor is connected with a capacitor; the controller controls the vacuum contactor for open or close via a second circuit, allowing for the switching control over the compensation capacitor. The utility model is compact in structure, small in bulk, simple to install, convenient to maintain, and high in reliability; since the outdoor transformer is replaced with the indoor transformer, not only the engineering cost is decreased, but also the device has improved reliability and can be applied under bad outdoor environmental conditions.

Description

High pressure Reactive Compensation Device on a kind of post of integral structure

One, affiliated technical field

The utility model relates to the electrical engineering technical field, relates to a kind of reactive power compensation device, high pressure Reactive Compensation Device on particularly a kind of post.

Two, background technology

At present, in China 3～35kV electrical network, the network loss rate is usually more than 10%, and is serious even reached 15%～20%.The principal element that produces this extremely uneconomical ruuning situation is that electric network reactive-load vacancy is big, and power factor is too low.So it is particularly important that compensating power becomes.

China adopts high-pressure reactive compensation device on the post in some areas, but used current transformer, voltage transformer, capacitor, close dispersions such as sub-agencies, controller and be installed on the circuit, this exists following deficiency: 1, installment work is very loaded down with trivial details, need be to each part wiring; 2, cost height, because all operations out of doors of each part, the class of insulation of requirement is higher than the indoor type components and parts, so corresponding investment is just big; 3, reliability is not high, because component is external, is subjected to the influence of environment bigger.

Three, summary of the invention

In view of the weak point that above prior art exists, the purpose of this utility model is, high pressure Reactive Compensation Device on a kind of post of integral structure is provided.This device not only can be according to voltage on the circuit, idle variation, the switching of automatic control capacitor, and adopted integral structure, with current transformer, voltage transformer, capacitor, close sub-agencies, fuse, secondary line and place a casing, reduce cost, be subjected to external environment influence little, the reliability height, easy for installation.

To achieve these goals, the thinking that the utility model adopted is: three-phase line is by wall bushing, in the access to plant case.By installing built-in current transformer and voltage transformer, signal is adopted in the controller, pass through the switching of secondary line control capacitor then.

The solution of above-mentioned technical thought is, high pressure Reactive Compensation Device on the post of integral structure, comprise a casing, be characterized in, in casing, be provided with wall bushing, high-tension line is by in the wall bushing introducing device case, and is connected with the built-in voltage transformer of casing and passes a current transformer, and the voltage transformer summation current transformer is adopted voltage and current signal in the controller that is provided with in the casing; Fuse one end connects high-tension line inlet wire side, the other end is connected with vacuum contactor inlet wire side, vacuum contactor outlet side is connected with compensation condenser, and controller compensates the switching control of capacitor by the branch that closes of secondary line control vacuum contactor.Above-mentioned all devices all place casing.

Described controller comprises, a CPU is connected with sampling input module, control signal output module, RS232 communication interface on the CPU, and the RS232 communication interface can direct communication, also can realize wireless telecommunications by connecting a wireless communication module, and control signal is defeated

Going out module is connected with secondary line.

Described built-in voltage transformer, current transformer can use 1 or 2 or 3 respectively.

Effect of the present utility model is: built-in current transformer and voltage transformer make installation process simplification, convenient purification; Replace the outdoor type instrument transformer with the indoor type instrument transformer, not only reduce engineering cost, and increased the reliability of device.

Four, description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a principle schematic of the present utility model;

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

Fig. 4 is a controller signals Acquisition Circuit of the present utility model

Fig. 5 is the signal processing circuit of the utility model controller;

Fig. 6 is the output board of the utility model controller;

Fig. 7 is the scm software flow chart of controller;

Fig. 8 is the scm software major cycle schematic diagram of controller.

Fig. 9 is the schematic diagram of secondary line.

Among Fig. 1,1, wall bushing; 3, current transformer; 4, voltage transformer; 6, controller; 7, secondary line; 8, fuse; 9, vacuum contactor; 10, capacitor; 11, copper bar; 12, casing.

Among Fig. 2,4, voltage transformer; 3, current transformer; 6, controller; 8, fuse; 9, vacuum contactor; 10, capacitor.

Five, embodiment

Understand the utility model for clearer, the utility model is described in further detail below in conjunction with drawings and Examples.

According to the technical solution of the utility model, high pressure Reactive Compensation Device on the post of integral structure of the present utility model, comprise a casing 12, be characterized in, be provided with wall bushing 1 at casing 12 inner tops, three-phase ac power supply A, B, C introduce in the casing 12 by wall bushing 1 mutually, and are connected with the built-in voltage transformer 4 of casing, and passing a built-in current transformer 3, voltage transformer 4 summation current transformers 3 are adopted voltage and current signal in the controller 6 that is provided with in the casing; Fuse 8 one ends connect high-tension line inlet wire side, the other end is connected with vacuum contactor 9 inlet wire sides, vacuum contactor 9 outlet sides are connected with capacitor 10, and controller 6 carries out the switching control of capacitor 10 by the branch that closes of secondary line 7 control vacuum contactors 9.Above-mentioned all devices are all inserted in the casing 12.

Device is divided into eight parts: wall bushing, voltage transformer, current transformer, fuse, vacuum contactor, capacitor, controller, secondary line.

Referring to accompanying drawing 1～2, Fig. 1 is a structural representation of the present utility model, and Fig. 2 is a principle schematic of the present utility model; Line voltage distribution Uac passes through current transformer 3 by voltage transformer 4, line current Ib, adopt in the controller 6, through monitoring, calculating, the comparison of control unit, whether decision is exported control signal and is given secondary line 7, thereby the action of control vacuum contactor 9 comes the switching of control capacitor 10.

In Fig. 1, high-tension line is by in the wall bushing 1 introducing device case 12, and built-in current transformer 3, voltage transformer 4 are adopted electric current, voltage signal in the controller 6.Fuse 8 one ends connect high-tension line inlet wire side, and the other end links to each other with vacuum contactor 9 inlet wire sides, and the branch that closes of vacuum contactor 9 is controlled by secondary line 7 by controller 6, and vacuum contactor 9 outlet sides link to each other with capacitor 10.

Fig. 3 is a controller block diagram of the present utility model.Comprise that a CPU is connected with sampling input module, control signal output module, RS232 communication interface on the CPU, the RS232 communication interface can connect a wireless communication module, and the control signal output module is connected with secondary line.

Fig. 4 is a controller signals Acquisition Circuit of the present utility model, also is a specific embodiment of the present utility model.Form by terminal JP1, resistance R, voltage transformer T1, T2, current transformer T3, operational amplifier LM324, interface J1, J2 and reference voltage adjustable chip LM185.This circuit is gathered voltage, current signal from the outside, and output signal is connected to signal processing circuit by interface.

Fig. 5 is the signal processing circuit of a concrete controller.Form by digital signal processor TMS320F260, static RAM (SRAM) CY7C1021, Schmidt trigger 4093, programmable logic array GAL20V8, latch 74LS377, NAND gate 74ALS04, LCD, RS232 communication interface MAX232 and interface J0, resistance R, variable resistor RP, capacitor C, diode D, voltage-stabiliser tube, crystal oscillator OSC, Zener diode DM.This part circuit receives the signal that signal acquisition circuit sends, and is handled by DSP, need to judge whether switched capacitor.Output signal is linked to each other with output board by JP1, JP2.

Fig. 6 is the output board of controller.Form by optocoupler TLP521-4, Darlington transistor ULN2803 and resistance row RP3, interface JP2, JC2 and relay R ELAY-DPDT.The effect of this part circuit is to receive the control signal that signal processing circuit sends, and the branch that closes by relay output control vacuum contactor comes switched capacitor.

Fig. 7 is the scm software flow chart of controller; Fig. 8 is the scm software major cycle schematic diagram of controller.The software design of the single-chip microcomputer of the utility model controller becomes the structure of real-time multi-task, regularly interrupt call display subroutine, and time for reading, store historical data.The dsp serial communication is interrupted the information that receives is deposited in buffering area, shows after finishing receiving, and realizes communication function by the RS232 communication interface, also can connect a wireless communication module and carry out radio communication.

The workflow of its software is, promptly carry out A/D sampling, electric weight calculating after the initialization, judge system mode, serial communication, the differentiation of moving then comprises the differentiation that starts time-delay, setting-up time, capacitor switching flag set, the switching of decision capacitor.

Fig. 9 is the schematic diagram of secondary line.Comprise control power supply, air switch, controller loop, the indication of capacitor input, automatic switching, six parts of manual switching.Wherein, the control power supply is introduced by voltage transformer, for secondary line provides working power; Air switch has two, is contained in two outlet sides of voltage transformer respectively; The power supply indication has an indicator light, and when the loop was connected, this indicator light was bright; In the controller loop, controller connects in the line; The indication of capacitor input comprises two contactor 2JC and 3JC and indicator light, and when any one contactor was closed, indicator light was bright; Automatic switching comprises controller, contactor 2JC, when controller sends the switching instruction, and contactor 2JC closure, thus make 10kV vacuum contactor closure; Manual switching comprises that one often opens button TA, a normally closed button HA and a contactor 3JC, when pressing the button HA, and the contactor closure, thus make 10kV vacuum contactor closure, when pressing the button TA, contactor disconnects, the disjunction of 10kV vacuum contactor.Automatic switching and manual switching selection finish by change over switch HK.

Built-in voltage transformer, the current transformer of the utility model can use 1 or 2 or 3 respectively, to satisfy the needs of different occasions.

Above-mentioned just preferred embodiment, the utility model is not limited to this embodiment.

The utility model compact conformation, volume are little, and installation process is simple, and is easy to maintenance, the reliability height,

Built-in current transformer and voltage transformer make installation process simplification, convenient purification; Replace the outdoor type instrument transformer with the indoor type instrument transformer, not only reduce engineering cost, and increased the reliability of device.

The utility model uses under the adverse circumstances out of doors.Control algolithm advanced person, the automaticity height, easy to operate.Have perfect defencive function, communication interface easily, intelligent and automaticity has all reached leading domestic level.

Claims

1. high pressure Reactive Compensation Device on the post of an integral structure, it is characterized in that, this device comprises: a casing [12], at the top of casing [12] installing wall bushing [1], the three-phase high-voltage alternating current by lead in wall bushing [1] is introduced casing [12], and behind copper bar [11], draw casing [12] by another wall bushing, High Level AC Voltage is connected with the built-in voltage transformer [4] of casing, and passing a built-in current transformer [3], voltage transformer [4] summation current transformer [3] is with voltage, current signal is adopted in the controller [6] that is provided with in the casing; Also be provided with fuse [8] in the casing [1 2], fuse [8] one ends connect high-tension line inlet wire side, the other end is connected with vacuum contactor [9] inlet wire side, vacuum contactor [9] outlet side is connected with capacitor [10], controller [6] is by the branch that closes of secondary line [7] control vacuum contactor [9], carry out the switching control of capacitor [10], above-mentioned all devices all place casing [12].

2. high pressure Reactive Compensation Device on the post of integral structure as claimed in claim 1, it is characterized in that, described controller [6] comprises, one CPU, be connected with sampling input module, control signal output module, RS232 communication interface on the CPU, the RS232 communication interface can connect a wireless communication module, and the control signal output module is connected with relay.

3. high pressure Reactive Compensation Device on the post of integral structure as claimed in claim 1 is characterized in that, described built-in voltage transformer [4], current transformer [3] can use 1 or 2 or 3 respectively.