Reactive power compensation control electricity cabinet
The utility model relates to a kind of switchgear house, and what be specifically related to is reactive power compensation control electricity cabinet.
In the process of electric power system transmission of electric energy, reactive power is not enough, the total current that makes to carry in system is increased, makes to the minimizing of exerting oneself, supply line and the increase of system equipment active power loss, the line end voltage drop of transformer; And for power consumer, from electrical network, draw too much idlely, and not only make the electrical network quality of power supply decline, also affect self electricity consumption and production, the performance of enterprises is declined, even cause fine.
Summary of the invention
The purpose of this utility model is to solve the problem of active power loss increase, line end voltage drop, the decline of the consumer networks quality of power supply, the reactive power compensation control electricity cabinet that provide a kind of effective compensation reactive power, improve the quality of power supply, reduces the wastage.
For solving above-mentioned shortcoming, the technical solution of the utility model is as follows:
Reactive power compensation control electricity cabinet, is mainly comprised of the electric power incoming line terminal, circuit breaker, contactor, relay, the capacitor that connect in turn, also comprises for controlling the idle compensating control of electric current, voltage signal.
As a kind of preferred, described circuit breaker is high-breaking miniature breaker; Described contactor is electric capacity switching contactor; Described relay adopts thermal relay; Described capacitor adopts shunt capacitor.
In order to reach result of use best, simultaneously in order to make the utility model heat dispersion better, outward appearance is more elegant in appearance, the utility model is also provided with frame, and described electric power incoming line terminal, circuit breaker, contactor, relay, capacitor and idle compensating control are all installed in this frame.
As optimum set-up mode, described frame by pillar, be fixed on pillar top top board, be fixed on the base plate of pillar bottom and be arranged at top board and base plate between dividing plate form.
As optimum mounting means, described idle compensating control is fixed on top board, is also fixed with controller switches and loop signal lamp on this top board; Described electric power incoming line terminal is fixed on the pillar between top board and dividing plate; Described circuit breaker, contactor and relay are fixed on dividing plate in turn; Described capacitor is fixed on base plate.
The utility model compared with prior art, has the following advantages and beneficial effect:
1, the utility model can effective compensation reactive power, improve the quality of power supply, reduce the wastage, it is indispensable energy-saving equipment, meanwhile, the utility model provides a set of complete scientific basis for formulating operation power scheme and the equipment increase-volume etc. of economy, safety;
2, to adopt shunt capacitor to carry out reactive power compensation be that a kind of small investment, construction are simple, the compensation way of instant effect to the utility model, it can be easily control capacitance switching on the spot, to reduce line loss, eliminate the weary negative effect bringing to system of idle feedback;
3, the utility model mainly adopts single chip microcomputer technology, gather the data such as the electric current, voltage of computational scheme or controller switching equipment, meritorious, idle and power factor, application region control principle, controls switching power capacitor, realizes reactive power automatic compensation and monitoring power distribution function; The utility model is the switching of control capacitor correctly, makes transformer low voltage three-phase in a basic balance, and makes power factor of electric network be adjusted to optimum state;
4, the utility model can manual switching, again can automatic switching, facilitate user's debugging test and operation; Whether device also has self-checking function, correct for auxiliary examination wiring;
5, in the utility model, user can select contactor, thyristor or combination switch targetedly according to the reactive load frequent degree that fluctuates, and is guaranteeing under the prerequisite in switch superperformance and life-span, reduces cost of investment and loss;
6, the utility model is applicable to 400V low-voltage network, can be widely used in the enterprises such as outdoor desk-top transformer, interior distribution chamber, box-type substation and metallurgy, machinery, mine, railway, chemical industry or low-voltage customer and carry out automatic tracking and compensating, applied widely.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Wherein, the parts name that in figure, Reference numeral is corresponding is called:
1-electric power incoming line terminal, 2-circuit breaker, 3-contactor, 4-relay, 5-capacitor, 6-idle compensating control, 7-pillar, 8-top board, 9-base plate, 10-dividing plate, 11-controller switches, 12-loop signal lamp.
Below in conjunction with embodiment and accompanying drawing thereof, the utility model is described in further detail, but execution mode of the present utility model is not limited to this.
Reactive power compensation control electricity cabinet, as shown in Figure 1, mainly by electric power incoming line terminal 1, circuit breaker 2, contactor 3, relay 4, capacitor 5 and idle compensating control 6, formed, its concrete connected mode is as follows: electric power incoming line terminal, circuit breaker, contactor, relay, capacitor connect in turn, and idle compensating control is for controlling electric current, voltage signal.
As set-up mode optimum in the utility model, described circuit breaker is high-breaking miniature breaker; Described relay adopts thermal relay, and described capacitor adopts shunt capacitor.
Described contactor is electric capacity switching contactor; in order effectively to reduce this contactor of cost of the present utility model and loss, can replace with thyristor or combination switch, adopt thyristor or combination switch to replace contactor in the utility model also to belong to the scope that the utility model is protected.That is,, according to the reactive load frequent degree that fluctuates, user can select contactor, thyristor or combination switch targetedly.Wherein, the feature of described three kinds of switches is as follows,
Contactless contactor: impulse current large (maximum can reach 40 times of rated current) during switching capacitance, have arcing, switch life short (being generally less than 10,000 times), but low in energy consumption when through-flow, relatively be applicable to load substantially do not fluctuate or the fluctuate occasion of very frequent (such as load fluctuation, be no more than every day 3 times);
Thyristor switch: zero crossing switching capacitance, impulse current little (1.5 times of rated current), switch life are long, but power consumption very large (4.5W/A) when through-flow, be relatively applicable to the occasion of special frequent fluctuation (every day, fluctuation was greater than 200 times);
Combination switch: zero crossing switching capacitance, impulse current little (1.5 times of rated current), switch life are little compared with long (being greater than 500,000 times), power consumption, is relatively applicable to the occasion of non-special frequent fluctuation (every day, fluctuation was less than 200 times).
Combination switch is a kind of by the switch form of bidirectional thyristor and contactor parallel running, and it is equipped with control circuit, and when switch is dropped into, thyristor first drops into, and during switch excision, after thyristor, excises, and realizes without arc switching, while normally moving, by contactor loaded current.
Because of in certain compensation capacity situation, compensation way is more, and compensation effect is better, but investment is larger, and in order to reach the highest cost performance, the utility model is determined the capacity of single branch road compensation according to negative true lotus fluctuating characteristic, thereby surely compensates way.Wherein, general 2～4 tunnels of selecting of outdoor compensation box, the general 4～12 roads of selecting of indoor compensation box.
In order to make the utility model more succinct, attractive in appearance, reach heat dispersion best simultaneously, electric power incoming line terminal, circuit breaker, contactor, relay, capacitor and idle compensating control in the utility model is all arranged in frame, and the concrete structure of this frame is as follows:
This frame by pillar 7, be fixed on pillar top top board 8, be fixed on the base plate 9 of pillar bottom and be arranged at top board and base plate between dividing plate 10 form.This pillar is four, and this top board, base plate and dividing plate are rectangle, as inscribes as shown in the of 1, and four pillars are individually fixed on rectangular four angles.
Described dividing plate is divided into upper and lower two spaces by support of the present utility model, wherein electric power incoming line terminal is fixed on the pillar in space, fixedly circuit breaker, contactor and relay successively on upper spatial clapboard, this capacitor is fixed on the base plate in lower space, this idle compensating control is fixed on top board, and this top board top is also fixed with controller switches 11 and loop signal lamp 12.
According to above design, just can realize preferably the utility model.