CN203504005U - Intelligent voltage-adjustable power transformation and distribution device - Google Patents

Abstract

An intelligent adjustable voltage change power distribution device, including a transformer and a low-voltage power distribution cabinet. The low-voltage outgoing line end face of the transformer is arranged close to the back or side of the low-voltage power distribution cabinet. Compensation devices, metering device, circuit breaker and control terminal; the transformer housing is equipped with an on-load tap changer and its operation control device. The high-voltage winding of the transformer is composed of multiple sets of coils connected in series. Enter the on-load voltage regulating switch as the end of each adjustment gear. The utility model can realize the automatic adjustment of the transformer voltage according to the load change, can ensure the continuity of the power supply and the stability of the output voltage, greatly reduce the power loss of the power grid, improve the quality of the power supply and the service life of the equipment, and create conditions for economic operation and power grid scheduling automation ; And it occupies a small space, easy to install and maintain, safe and reliable in operation, can effectively prevent electricity theft, and is more convenient for intelligent automatic monitoring and management of power systems.

Description

An intelligent adjustable voltage transformer distribution device

technical field

The utility model relates to an electric power equipment, in particular to an intelligent adjustable voltage variable power distribution device.

Background technique

Transformers and low-voltage distribution boxes are widely used in power supply systems. In the existing technology, power distribution, metering, compensation, and wireless transmission are completed by different devices. Prevent electricity theft, poor operation safety and reliability.

In the process of power transmission, in order to avoid the loss of the power supply line, it is necessary to transmit it to the terminal with a higher voltage, that is, the user terminal, so that the terminal's electrical equipment often works at a state higher than the rated voltage, which not only causes a waste of power , will also seriously shorten the service life of the equipment. On the other hand, in order to ensure that the equipment can still operate normally when the voltage at the user end drops during the peak period of power consumption, the output voltage of the power supply transformer is often designed to be higher than the rated voltage. Voltage, but at the same time, the problem is that after the peak period of electricity consumption, there will be overvoltage power supply, resulting in waste. The loss of electrical equipment mainly includes two parts: copper loss and iron loss, and the total loss value is near the rated voltage in the operating state with the smallest value. Therefore, it is the most economical and reasonable to keep the output voltage of the transformer qualified and make the electrical equipment run at the rated voltage. At this stage, the transformer cannot adjust the voltage change on the load side under the live state according to the operating conditions, which may easily cause large voltage fluctuations on the low-voltage side of the transformer and affect the quality of power supply; The loss is large, and the energy-saving effect is not ideal.

Therefore, it is very important to design a transformer that is not only convenient for installation and maintenance, but also can effectively prevent electricity theft, ensure safe and reliable operation, and is easy to observe, analyze and transmit data, and can adjust the voltage according to the load size without power failure of the transformer. necessary.

Utility model content

The main purpose of the utility model is to overcome the shortcomings of the prior art, provide a transformer voltage can be automatically adjusted according to load changes, improve the continuity of power supply and the stability of output voltage, greatly reduce power loss, improve power supply quality, and facilitate Installation and maintenance, safe and reliable operation, and can effectively prevent electricity theft, more convenient intelligent automatic monitoring and management of power system intelligent adjustable voltage transformer power distribution device.

The utility model adopts the following technical solutions:

An intelligent adjustable voltage change power distribution device, including a transformer and a low-voltage power distribution cabinet, the transformer includes a transformer shell, an iron core installed in the transformer shell, and a high-voltage winding and a low-voltage winding sleeved on the iron core , the low-voltage outgoing line end of the transformer is set close to the back or side of the low-voltage power distribution cabinet. Compensation devices, metering devices, circuit breakers and control terminals are also installed in the low-voltage power distribution cabinet. The low-voltage outgoing line of the transformer passes through the incoming bus bar It is connected to the incoming line end of the compensation device, and the outgoing line end of the compensation device is connected to the incoming line end of the circuit breaker through the outgoing line bus bar, and is connected to the control terminal at the same time. The metering device is arranged on the incoming line bus bar; the transformer housing There is an on-load tap changer and its operation control device on it. The high-voltage winding is composed of at least two sets of coils connected in series. Each set of coils has its own coil tap. Each coil tap is connected to the on-load tap changer as an on-load tap The end of each adjustment position of the pressure switch.

Further, the compensation device includes a load isolating switch and an intelligent integrated power capacitor, the low-voltage outgoing line end of the transformer is connected to the incoming line end of the load isolating switch through the incoming line bus bar, and the outgoing line end of the load isolating switch is connected through the outgoing line bus bar It is connected with the incoming line end of the circuit breaker, and connected with the intelligent integrated power capacitor and the control terminal respectively.

Further, the metering device includes a current transformer arranged on the incoming bus bar.

Further, the iron core in which the winding is nested is an amorphous alloy iron core.

As can be seen from the above description of the utility model, compared with the prior art, the utility model has the following beneficial effects:

First, by adjusting the on-load tap changer to change the voltage ratio of the transformer and change the output voltage, the operating transformer voltage can be automatically adjusted according to the load change, replacing the conventional manual power-off adjustment, which can ensure the continuity of power supply and output voltage The stability of the system can significantly improve the quality of power supply and create conditions for economical operation, prolonging the service life of equipment and automating power grid dispatching;

Second, the use of amorphous alloy iron core transformer greatly reduces the no-load loss, greatly reduces the power loss of the power grid, has low operating noise, small footprint, and is extremely convenient to install and use;

Third, the transformer, metering box, compensation box, and distribution box are integrated into one device, and the primary elements and exposed live parts are all isolated, reducing a large number of secondary control elements and their connections. Not only is the structure simple, It can reduce occupied space, save materials and costs, and is convenient for installation and maintenance, safe and reliable in operation, and can effectively prevent electricity theft, easy to monitor, observe, analyze and transmit data, and more convenient for intelligent automatic monitoring and management of power systems.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the specific embodiment of the present utility model;

Fig. 2 is a schematic diagram of transformer tap connection when on-load voltage regulation is performed according to a specific embodiment of the utility model.

In the figure: 1. Transformer, 2. Low-voltage power distribution cabinet, 3. Circuit breaker, 4. Control terminal, 5. Load isolation switch, 6. Intelligent integrated power capacitor, 7. Transformer low-voltage outlet terminal, 8. Incoming bus bar , 9. Outgoing busbar, 10. Current transformer, 11. On-load tap changer, 12. Operation control device.

Detailed ways

The utility model will be further described below through specific embodiments.

Referring to Fig. 1 and Fig. 2, an intelligent adjustable voltage transformer power distribution device of the present invention includes a transformer 1 and a low-voltage power distribution cabinet 2, the transformer 1 includes a transformer shell, and an iron box installed in the transformer shell core and the high-voltage winding and low-voltage winding set on the iron core, the low-voltage outgoing line end face of the transformer 1 is set close to the back or side of the low-voltage power distribution cabinet 2, and the low-voltage power distribution cabinet 2 is also installed with a compensation device and a metering device , a circuit breaker 3 and a control terminal 4, the compensation device includes a load isolating switch 5 and an intelligent integrated power capacitor 6, the transformer low-voltage outlet terminal 7 is connected to the input terminal of the load isolating switch 5 through an incoming line bus bar 8, and the load is isolated The outgoing line end of the switch 5 is connected with the incoming line end of the circuit breaker 3 through the outgoing line bus bar 9, and is respectively connected with the intelligent integrated power capacitor 6 and the control terminal 4. The metering device includes a current meter set on the incoming line bus bar 8 Transformer 10.

Referring to Figures 1 and 2, the transformer housing is provided with an on-load tap changer 11 and its operation control device 12, and the high-voltage winding is composed of 8 groups of coils connected in series, each group of coils has its own coil tap, each coil The taps are connected to the on-load tap-changing switch 11 as the terminals of the eight adjustment gears of the on-load tap-changing switch 11 . The iron core in which the winding is nested is an amorphous alloy iron core.

The above is only a specific embodiment of the present utility model, but the design concept of the present utility model is not limited thereto, and any insubstantial changes made to the present utility model by using this concept should belong to violations of the protection scope of the present utility model Behavior.

Claims (4)

1. an intelligent pressure-adjustable becomes power distribution equipment, include transformer and low-voltage distribution cabinet, described transformer includes transformer shell, be arranged on the iron core in transformer shell and be nested with the high pressure winding on iron core, low pressure winding, it is characterized in that: the low-pressure line-outgoing end face of described transformer arranges near the back side or the side of low-voltage distribution cabinet, compensation arrangement is also installed in low-voltage distribution cabinet, metering device, circuit breaker and control terminal, the low-pressure line-outgoing end of transformer connects with the end of incoming cables of compensation arrangement by inlet wire bus-bar, the leading-out terminal of compensation arrangement connects with the end of incoming cables of circuit breaker by outlet bus-bar, be connected in control terminal simultaneously, described metering device is arranged on inlet wire bus-bar, on described transformer shell, be provided with on-load voltage regulating switch and operating control device thereof, high pressure winding consists of at least two group coil tandems, each is organized coil and all has coil tap separately, and each coil tap connects access on-load voltage regulating switch as the termination of each regulation stall of on-load voltage regulating switch.

2. a kind of intelligent pressure-adjustable as claimed in claim 1 becomes power distribution equipment, it is characterized in that: described compensation arrangement includes load-break switch and Intelligent integration power condenser, the low-pressure line-outgoing end of described transformer connects with the end of incoming cables of load-break switch by inlet wire bus-bar, the leading-out terminal of load-break switch connects with the end of incoming cables of circuit breaker by outlet bus-bar, and connects with Intelligent integration power condenser and control terminal respectively.

3. a kind of intelligent pressure-adjustable as claimed in claim 1 becomes power distribution equipment, it is characterized in that: described metering device includes the current transformer being arranged on inlet wire bus-bar.

4. a kind of intelligent pressure-adjustable as claimed in claim 1 becomes power distribution equipment, it is characterized in that: the iron core that described winding is nested with is amorphous alloy iron core.

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