CN2922239Y

CN2922239Y - Unit structure type Low-voltage reactive-load compensation device

Info

Publication number: CN2922239Y
Application number: CNU2006200231609U
Authority: CN
Inventors: 战子英
Original assignee: 战子英
Current assignee: Beijing Chance Electricity Co., Ltd.
Priority date: 2006-06-27
Filing date: 2006-06-27
Publication date: 2007-07-11
Anticipated expiration: 2016-06-27

Abstract

The utility model discloses a unit structure type low-voltage reactive-load compensation device, which comprises a cabinet, a switch unit and a control unit, wherein, the switch unit is a drawer type structure switch unit. Each switch unit comprises a loop switch, a group of switch capacitance switch, a group of low voltage electric capacitance devices. Each switch unit is connected with each other by a bus row and a bus connection clamp, and is electrically connected with a control unit by the bus row and the bus connection clamp. The switch unit of the drawer type structure comprises a drawer type unit framework with a main unit plate, more than one group of low-voltage electric capacitance arranged on the bottom girder of the unit framework, more than one group of switch capacitance switch controlled by low-voltage reactive-load compensator controller, an electric capacitance group for switching and a group of bus rack and bus row arranged on the unit framework main unit plate. The electric connection of low-voltage electric capacitance and a switch loop is realized by the bus.

Description

Cellular construction formula low-voltage reactive compensator capable

Technical field

The utility model relates to a kind of cellular construction formula low-voltage reactive compensator capable.

Background technology

The use of low-voltage reactive power automatic compensation device can reduce for the electric energy loss of distribution power equipment, improves the power supply unit utilance, and improves the supply power voltage quality to a certain extent, therefore always is subjected to the great attention of power department, obtains using very widely.

Each loop of common low-voltage reactive compensator capable is by switching device, the switched capacitor switch, device such as capacitor and reactor constitutes, the reactive power compensator of most of manufacturer production is the frame-type Installation Modes, as shown in the figure: main switch 1 ' is fixedly mounted on the crossbeam 2 ' of compensation arrangement inner upper end, main switch is divided in the cabinet and cabinet is operated outward, air circuit or fuse 3 ' along separate routes installed in the main switch lower end, what be connected with air circuit or fuse is to be used for the switch 4 ' of switched capacitor, switched capacitor switch lower end is capacitor and reactor 5 ', and these electric elements connect by bus or busbar.The low-voltage reactive compensator capable overall structure of this structure is looser, and each device putting in cabinet is scattered, and device mounting is very inconvenient, and mounting process and process are complicated: 1) faying surface of requirement and bus or electric component terminals need be warded off the tin processing; 2) the busbar processing of need painting; 3) instrument is installed on the instrument door 6 ', the wire harness processing of need moving into one's husband's household upon marriage, and wire harness is longer, the distribution inconvenience, the secondary distribution is difficult to reach neat appearance.Brought very big difficulty and workload for the on-the-spot direct labor who installs or transform.Because the putting position of device does not have exact design in the cabinet, also the transformation of expanding capacity to the user has brought a lot of inconvenience: or lack reserved location, or Position Design is improper, has brought very big difficulty for the increase-volume of reactive power compensator.

Summary of the invention

The purpose of this utility model provides a kind of cellular construction formula low-voltage reactive compensator capable, not only can realize on-the-spot Fast Installation, also can be easily realizes dilatation or subtracts appearance according to the capacity requirement of reactive power compensator, to reach the high purpose of service efficiency.

For achieving the above object, the utility model is taked following design:

A kind of cellular construction formula low-voltage reactive compensator capable, form by cabinet, control unit and switching unit, described switching unit is more than one drawer formula structure switching unit, and each switching unit comprises a circuit switching, one or more groups switched capacitor switch, one group of above low voltage power capacitor group device; Connect by bus row and bus that folder is realized each other between each switching unit and and control unit between be electrically connected.

The switching unit of described drawer formula structure comprises: one has the drawer unit skeleton of master unit plate, one group of above low voltage power capacitor of fixed installation on the bottom girder of unit skeleton; The switched capacitor switch that is controlled by low-pressure reactive compensation device controller more than one group is used for switching low-voltage electric power capacitor group; One group of bus-bar frame, bus row who is arranged on the unit skeleton master unit plate.Realize being electrically connected of low voltage power capacitor and fling-cut switch loop by bus.

The switching unit of described drawer formula structure also can comprise one group of reactor of using when suppressing harmonic wave or filtering, is fixedly mounted on the bottom girder of unit skeleton, by being electrically connected of bus realization and fling-cut switch loop.

The switching unit of described drawer formula structure also can comprise one group of hanging-connecting fuse isolating switch to capacitor loops overcurrent and short-circuit protection.

The utility model has the advantages that:

1, compact overall structure, the contour structures orderliness is neat, attractive in appearance;

2, because the compactness of cellular construction components and parts make whole machine installation save the space, and installed capacity is big;

3, the bus-type switch directly is articulated on the busbar, need not screw and fix, and busbar need not on-the-spot punching and connects, and makes on-the-spot installation or transform quick and easy;

4, standardization, closely optimal design can make things convenient for system the expansion capacity to satisfy different needs, not only enlarged its scope of application, also can satisfy the not demand of the switching precision of the compensating cabinet of capacity of the same race;

5, total wiring amount reduces, and is easy to safeguard.

The utility model cellular construction formula low-voltage reactive compensator capable, can design new rack configuration, also can be fit to the installation of various model low-voltage reactive compensator capable cabinets such as existing GGD, GCS, GCK, MNS, only need demand configuration by measure, one or more groups selected switching cell arrangement is inserted in the drawer of corresponding rack and get final product.

Description of drawings

Fig. 1-a) is the utility model structural representation (front view)

Fig. 1-b) is the utility model structural representation (end view)

Fig. 2-a) is the switching cellular construction schematic diagram (front view) of the utility model drawer formula structure

Fig. 2-b) is the switching cellular construction schematic diagram (end view) of the utility model drawer formula structure

Fig. 2-c) is the switching cellular construction schematic diagram (vertical view) of the utility model drawer formula structure

Fig. 3 is six embodiment electrical schematic diagrams in switching unit of the utility model drawer formula structure

The parts of Fig. 4 the utility model reactive power compensator connect electrical schematic diagram

Fig. 5 is a prior art low-voltage reactive compensator capable structural representation

Embodiment

Shown in Fig. 1-a), Fig. 1-b), the utility model cellular construction formula low-voltage reactive compensator capable comprises cabinet 1, control unit 2 and switching unit 3.Described switching unit is more than one drawer formula structure switching unit.

Each drawer formula structure switching unit 3 of the present utility model all includes a circuit switching, one group of above switched capacitor switch, one group of low voltage power capacitor group device; Connect by bus row and bus that folder is realized each other between each switching unit and with being electrically connected of controller unit.

The switching unit concrete structure of the utility model drawer formula structure can be referring to shown in Fig. 2-a), Fig. 2-b) and Fig. 2-c): comprise that one has master unit plate 302, fixed installation one group capacitor 308 and one group of reactor 309 on the master unit bottom girder 310 (or only be a group capacitor, at the place of no harmonic wave uneasiness reactor).

One main switch 303 can adopt fuse disconnecting switch, is used to realize capacitor over-current and short-circuit protection to this device; Many group switched capacitor switches 304 also are set, are used to realize break-make control capacitor 308.

One group queues supporting role bus-bar frame 305 and bus row 306 to bus and is arranged on the unit skeleton and (is arranged on the front side board to good, assembling with the handled easily person), connect by bus, bus that folder is realized between each function components and parts (capacitor or capacitor, reactor the two combination) and with to inductive switch be connected and provide with in abutting connection with being connected between switching cell arrangement and the control unit.Bus-bar system is adopted standardized designs, make bus play the effect of not only conducting electricity but also can support electric component.

Shown in Figure 3 is six the embodiment electrical schematic diagrams in the utility model switching unit, wherein Fig. 3-a) fling-cut switch is the switching unit of noncontacting switch, Fig. 3-b) fling-cut switch is the switching unit of combination switch, Fig. 3-c) fling-cut switch is the switching unit of contactor, the fling-cut switch of Fig. 3-d) be noncontacting switch and capacitor loops in the switching unit of series reactor is arranged, the fling-cut switch of Fig. 3-e) be combination switch and capacitor loops in the switching unit of series reactor is arranged, the fling-cut switch of Fig. 3-f) be contactor and capacitor loops in the switching unit of series reactor is arranged.One group of switched capacitor switch is A, B, C three-phase among above-mentioned six embodiment, is used for the switching three-phase condenser bank.

Fig. 4 is that the parts of the utility model reactive power compensator connect electrical schematic diagram, a) is the main control circuit winding diagram wherein, b) is the utility model reactor cooling system winding diagram.

The controller of the control unit that the utility model cellular construction formula low-voltage reactive compensator capable adopts is the core devices of control unit, and it adopts prior art to realize.This idle compensating control is sampled as system's one phase current, and two phase voltages in addition as the switching signal, are stopped throw in-of oscillation with the reactive power of system.The controller of this control unit possesses perfect demonstration, control, defencive function; can show power factor, system voltage, load current, reactive power, temperature, percent harmonic, capacitor switching state etc. in real time, and parameter values such as CT no-load voltage ratio, PT no-load voltage ratio, idle bound, voltage bound, delay value, the harmonic voltage percentage upper limit can onlinely be set.

The utility model cellular construction formula low-voltage reactive compensator capable operation principle following (transmission operation process): close the main switch on the control unit before putting into operation earlier, after main switch closed, the lightning arrester F on the control unit, the fuse type on-load switch FU on the switching unit all had voltage to exist.Judge the idle situation that system lacked by another phase current of controller extraction system two phase voltages on the control unit again, if system is perceptual idle greater than the idle higher limit that sets on the controller, then controller sends the order of throwing capacitor, and the fling-cut switch action drops into the capacitor group; If controller detects the idle lower limit that the capacitive reactive power of system sets greater than controller, then controller sends the signal of cutting capacitor, capacitor switching switch motion, excision capacitor group.The overvoltage of reactive power compensation cabinet, under-voltage by the controller realization, overcurrent and short-circuit protection are realized by the fuse type load-break switch.

Adopt the technical program, can accomplish that cellular construction formula low-voltage reactive compensator capable compares with prior art products, its cost performance is higher, range of capacity is wideer; A control unit can be connected to become low-voltage reactive compensator capable by bus and bus clip with eight switching unit at most, this device can effectively improve the electrical network quality of power supply, improve more than the system power factor to 0.95, make the meritorious loss of circuit reduce 25～50%, distribution line and transformer increase-volume 15～25%, reduce active loss, improve the electric power system economic benefit.

Claims

1, a kind of cellular construction formula low-voltage reactive compensator capable, formed by cabinet, switching unit and control unit, it is characterized in that: described switching unit is more than one drawer formula structure switching unit, and each switching unit comprises a circuit switching, one or more groups switched capacitor switch, one group of above low voltage power capacitor group device; Connecting folder by bus row and bus between each switching unit realizes connecting each other; Connecting folder by bus row and bus between switching unit and the control unit realizes being electrically connected.

2, cellular construction formula low-voltage reactive compensator capable according to claim 1, the switching unit that it is characterized in that described drawer formula structure comprises: one has the drawer unit skeleton of master unit plate, one group of above low voltage power capacitor of fixed installation on the bottom girder of unit skeleton; The switched capacitor switch that is controlled by low-pressure reactive compensation device controller more than one group is used for switching low-voltage electric power capacitor group; One group of bus-bar frame, bus row who is arranged on the unit skeleton master unit plate; Realize being electrically connected of low voltage power capacitor and fling-cut switch loop by bus.

3, cellular construction formula low-voltage reactive compensator capable according to claim 2, it is characterized in that: the switching unit of described drawer formula structure also comprises one group of reactor of using when suppressing harmonic wave or filtering, be fixedly mounted on the unit bottom girder, by being electrically connected of bus realization and fling-cut switch loop.

4, cellular construction formula low-voltage reactive compensator capable according to claim 2 is characterized in that: the switching unit of described drawer formula structure also comprises one group of hanging-connecting fuse isolating switch that capacitor loops is played overcurrent and short-circuit protection.