CN200997495Y - Intelligent economizing capacity-adjusting cased converting station - Google Patents

Abstract

The utility model relates to an intelligent energy-conservation and capacitance adjusting cabinet transformer substation, which comprises a high voltage chamber (H), a transformer chamber (T), a low-voltage chamber (L), a control cabinet (K) and a measuring chamber (J) and is characterized in that the transformer chamber (T) is provided with two sets of transformers with different capacitance, namely a large-capacitance transformer (T1) and a small-capacitance transformer (T2); wherein the two low-voltage side winding wire-out terminal of the large-capacitance transformer (T1) and the small-capacitance transformer (T2) are respectively connected to the tri-phase main contact static contact terminals of the two AC contactors (KM1 and KM2); tri-phase main contact dynamic contact terminals of the two AC contactors (KM1 and KM2) are connected is series; after connection in series they from a tri-phase low-voltage wire-out terminal that is fixed with the current mutual inductor and the voltage mutual inductor; and the control loop of the two AC contactors are arranged in the control chamber (K).

Description

Intelligent type energy saving capacity transfer box-type substation

Technical field:

The utility model relates to a kind of power transmission and transformation device that is used for electric power system, especially relates to a kind of box-type substation with enclosed construction.

Background technology:

Box-type substation is the power transmission and transformation device of undergroundization of the distribution system cable demand of a kind of looped network distribution system that can satisfy electricity consumption places such as urban skyscraper, residential quarters, industrial and mining enterprises, oil field or radiation terminal.Through application in a few years, the layout of box-type substation and function have basically formed format, adopt the structure of hyperbaric chamber, low-pressure chamber, transformer room usually, and its function is mainly: distribute electric energy, reactive power compensation and metering.Along with the continuous development and the requirements of saving energy of urban construction, find that original box-type substation exists practicality and the relatively poor defective of energy saving.This is because when formulating the box-type substation design, dual mode is arranged usually, a kind of is that choosing of transformer capacity left very big space, purpose is the convenient load that increases later on, if but do not increase load, excessive capacity certainly will cause transformer noload losses excessive, and economical operation efficient is low, waste a large amount of energy; Another is exactly that choosing of transformer capacity left less space, if but load when changing greatly, then can only change transformer again, cause the waste of existing equipment, poor practicability.

The utility model content:

The fixing transformer of employing capacity will not cause the practicality and the relatively poor problem of energy saving of transformer station in the existing box-type substation when load has according to the expection planned change in order to solve, the utility model provides a kind of intelligent type energy saving capacity transfer box-type substation, this kind intelligent type energy saving capacity transfer box-type substation can be according to the unequally loaded demand, automatically adjust the capacity of transformer, reach the energy-saving effect that reduces no-load loss, improved the practicality of box-type substation, made the case varying capacity dispose basic one-time-reach-place.

The technical solution of the utility model is: this kind intelligent type energy saving capacity transfer box-type substation, comprise the hyperbaric chamber, the transformer room, low-pressure chamber, the control room, measuring room, these all are conventional structures, unique distinction is: two transformers that capacity is different are installed in described transformer room, wherein high-power transformer is called transformer T1, small capacity transformer is called transformer T2, two step-down side winding terminals of transformer T1 and transformer T2 are connected to A.C. contactor KM1 respectively, fixed contact end on the three-phase main contacts of A.C. contactor KM2, described A.C. contactor KM1, be connected in series between the moving contact end homophase on the three-phase main contacts of A.C. contactor KM2, be fixed with current transformer and voltage transformer on the formed three-phase low pressure leading-out terminal after being connected in series, the control loop of described two A.C. contactors is in the control room, and its control loop adopts Single-chip Controlling.Data input pin on the single-chip microcomputer links to each other through the signal output part of analog to digital converter with the analog signal input processing module, the signal input part of described analog signal input processing module be fixed on three-phase low pressure leading-out terminal on current transformer and the signal output part of voltage transformer link to each other, control signal output ends on the single-chip microcomputer is connected to the digital signal input end of switching value output module, the digital signal output end of switching value output module drives direct current relay, the contact control A.C. contactor KM1 of described direct current relay, the adhesive of A.C. contactor KM2 three-phase main contacts with open.For improving energy-saving effect, the transformer of installing in described transformer room is hermetically sealed amorphous alloy transformer.

The utlity model has following beneficial effect: because after taking such scheme, the transformer of two different capabilities has been installed in a box-type substation, these two transformers can drop into simultaneously under the control action of two A.C. contactors or drop into respectively, and in the control loop of these two A.C. contactors owing to inserted the voltage transformer summation current transformer, therefore can carry out the switching of height capacity transformer according to detected load current.When load is light, small capacity transformer work, after load increased, small capacity transformer was out of service, high-power transformer work, two transformers move simultaneously when load is big, so just can adjust the capacity of transformer automatically, reach the energy-saving effect that reduces no-load loss according to the unequally loaded demand, improved the practicality of box-type substation, made the basic one-time-reach-place of box-type substation capacity configuration.

Description of drawings:

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

Fig. 2 is a Transformer Winding winding diagram of the present utility model.

Fig. 3 is a theory diagram of the present utility model.

Fig. 4 is that the utility model is used the theory diagram that single-chip microcomputer is controlled.

Fig. 5 is the electrical schematic diagram of analog signal input processing module.

Fig. 6 is the electrical schematic diagram of switching value output module.

Fig. 7 is the electrical schematic diagram of one-chip computer module.

H-hyperbaric chamber among the figure, T-transformer room, L-low-pressure chamber, K-control room, J-measuring room, R12-direct current relay.

Embodiment:

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

This kind intelligent type energy saving capacity transfer box-type substation, as shown in Figure 1, comprise hyperbaric chamber H, the T of transformer room, low-pressure chamber L, control room K, measuring room J, these all are the structures of general box-type substation, this novel part that makes improvements is: two transformers that capacity is different are installed in the described T of transformer room, wherein high-power transformer is called transformer T1, small capacity transformer is called transformer T2, as shown in Figure 2, two step-down side winding terminals of transformer T1 and transformer T2 are connected to A.C. contactor KM1 respectively, fixed contact end on the three-phase main contacts of A.C. contactor KM2, described A.C. contactor KM1, be connected in series between the moving contact end homophase on the three-phase main contacts of A.C. contactor KM2, be fixed with current transformer and voltage transformer on the formed three-phase low pressure leading-out terminal after being connected in series, the control loop of described two A.C. contactors is in the K of control room.

Control loop to two A.C. contactors can adopt Single-chip Controlling, the theory diagram of its control as shown in Figure 4, Fig. 5 is the electrical schematic diagram of analog signal input processing module, data input pin on the single-chip microcomputer links to each other through the signal output part of analog to digital converter with the analog signal input processing module, the signal input part of described analog signal input processing module be fixed on three-phase low pressure leading-out terminal on current transformer and the signal output part of voltage transformer link to each other, can detect the voltage and current signal of low-pressure side at any time, and these analog signals are input in the single-chip microcomputer by analog to digital converter, thereby provide enabling signal for the control program in the single-chip microcomputer.Control signal output ends on the single-chip microcomputer is connected to the digital signal input end of switching value output module, the electrical schematic diagram of switching value output module as shown in Figure 6, the digital signal output end of switching value output module drives direct current relay R12, in the DC control circuit of contact incoming transport contactor KM1, the A.C. contactor KM2 of described direct current relay R12, the adhesive of control A.C. contactor KM1, A.C. contactor KM2 three-phase main contacts with open.As shown in Figure 7, it is a kind of electrical schematic diagram that constitutes the one-chip computer module of automatic controller, single-chip microcomputer can detect loading condition at any time like this, automatically regulate output capacity according to institute's on-load, can use a transformer T1, soon A.C. contactor KM1 closure, A.C. contactor KM2 open, and transformer capacity is in underdrive operating; Also can use transformer T2, soon A.C. contactor KM2 closure, A.C. contactor KM1 open, and transformer capacity is in middle-grade operation; Perhaps use transformer T2 and transformer T1 simultaneously, it is closed simultaneously to be about to A.C. contactor KM2, A.C. contactor KM1, and transformer capacity is in high-grade operation.This structure of the present utility model can satisfy the unequally loaded demand, reaches the energy-saving effect that reduces no-load loss, has fully improved the practicality of box-type substation, makes the basic one-time-reach-place of capacity configuration of box-type substation.

Claims (3)

1, a kind of intelligent type energy saving capacity transfer box-type substation, comprise hyperbaric chamber (H), transformer room (T), low-pressure chamber (L), control room (K), measuring room (J), it is characterized in that: two transformers that capacity is different are installed in described transformer room (T), be high-power transformer (T1) and small capacity transformer (T2), two step-down side winding terminals of high-power transformer (T1) and small capacity transformer (T2) are connected to two A.C. contactor (KM1 respectively, KM2) the fixed contact end on the three-phase main contacts, described two A.C. contactor (KM1, KM2) be connected in series between the moving contact end homophase on the three-phase main contacts, be fixed with current transformer and voltage transformer on the formed three-phase low pressure leading-out terminal after being connected in series, the control loop of described two A.C. contactors is in control room (K).

2, intelligent type energy saving capacity transfer box-type substation according to claim 1, it is characterized in that: the control loop of described two A.C. contactors adopts Single-chip Controlling, data input pin on the single-chip microcomputer links to each other through the signal output part of analog to digital converter with the analog signal input processing module, the signal input part of described analog signal input processing module be fixed on three-phase low pressure leading-out terminal on current transformer and the signal output part of voltage transformer link to each other, control signal output ends on the single-chip microcomputer is connected to the digital signal input end of switching value output module, the digital signal output end of switching value output module drives direct current relay (R12), the contact of described direct current relay (R12) control described two A.C. contactors (KM1, the adhesive of three-phase main contacts KM2) with open.

3, intelligent type energy saving capacity transfer box-type substation according to claim 1 and 2 is characterized in that: the transformer of installing in described transformer room (T) is hermetically sealed amorphous alloy transformer.

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