CN212231100U - Distribution network voltage regulator - Google Patents

Abstract

The utility model discloses a distribution network regulator, including transformer winding, measuring subassembly, microprocessor and thyristor group, its characterized in that, thyristor group includes three to four groups thyristors and taps, and is connected through the electric property between thyristor and the tap, microprocessor is equipped with merit angle calculation, fault identification and control logic module, control logic module forms control command, and just through electric connection between merit angle calculation module and fault identification module and the control logic module, measuring subassembly's output and microprocessor are connected. The utility model discloses a measuring module obtains transformer secondary side voltage and electric current, accomplishes merit angle calculation, fault identification and formation control instruction by microprocessor, switches the thyristor in good time and opens or shuts, accomplishes voltage regulation function, and no electric arc does not have when the tap switches and strikes, does not have machinery and electric component, and the fault rate is low, and the maintenance work volume is little.

Description

Distribution network voltage regulator

Technical Field

The utility model relates to a distribution network technical field especially relates to a distribution network regulator.

Background

The voltage quality is one of the important indexes for assessing the power supply service level of the power enterprise. The power supply radius of the power grid line in China rural areas is large, the number of branch lines is large, the power consumption load points are various and wide, the power consumption load points are small and scattered, the seasonal load characteristics are obvious, the power consumption time period is too concentrated, the annual average load rate is low, and the peak-valley difference is large.

The distribution transformer is in a light-load running state in a low-valley load period, and the power supply voltage for users is higher; during peak load periods, the distribution transformer is in a heavy load or overload operation state, and the power supply voltage to users is low (referred to as low voltage). The higher supply voltage can accelerate the insulation aging of the power supply and utilization equipment, increase the loss and even endanger the safety of the power grid and the equipment. The problem of low power supply voltage, namely low voltage, causes the efficiency of power supply and utilization equipment to be reduced, endangers the safe and economic operation of a power grid, causes the abnormal use of partial household appliances and seriously influences the production and life of residents.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a power distribution network voltage regulating device.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a distribution network regulator, includes transformer winding, measuring component, microprocessor and thyristor group, its characterized in that, thyristor group includes three to four groups of thyristors and taps, and is connected through the electric property between thyristor and the tap, microprocessor is equipped with merit angle calculation, fault identification and control logic module, control logic module forms control instruction, and through electric connection between merit angle calculation module and fault identification module and the control logic module, measuring component's output and microprocessor are connected, form between thyristor group, measuring component and the transformer winding and connect the return circuit, control logic module establishes ties mutually with three to four groups of thyristors respectively.

As a further aspect of the present invention, three to four groups of the thyristors are light-operated thyristors, and the light-operated thyristors are composed of 4 layers in total of the PINIP2N 2.

As the utility model discloses in further scheme, measuring component's measuring range is transformer secondary side voltage and electric current of transformer winding.

As the utility model discloses in further scheme, the measuring component is including carrying electric voltmeter and carrying electric ammeter, and all establishes ties mutually with transformer winding's output winding between carrying electric voltmeter and the carrying electric ammeter.

As the utility model discloses in further scheme, still include non-electric quantity sensor among the measuring component, and non-electric quantity sensor is used for merit angle calculation module.

As the utility model discloses in further scheme, the fault identification module is connected with the live voltage table, and the fault identification module through live voltage table with microprocessor is connected.

As the utility model discloses in further scheme, the outer wall of thyristor group is equipped with heat radiation module, and heat radiation module is including radiator fan and temperature sensor, through electric connection between temperature sensor and the radiator fan, and be connected between temperature sensor's signal end and the microprocessor.

The utility model has the advantages that:

1. the voltage regulating device obtains the voltage and the current of the secondary side of the transformer through the measuring module, the microprocessor completes power angle calculation, fault identification and control instruction formation, and the thyristor is switched on and off timely to complete the voltage regulating function. The microprocessor can identify faults according to the actual condition of system voltage, selectively limits the action of the thyristor or locks the thyristor, and has no electric arc, no impact, no mechanical and electric parts, low fault rate and small maintenance workload when the tap is switched;

2. the thyristor group in the voltage regulating device is provided with the heat dissipation assembly, so that good heat dissipation effect is achieved in the opening and closing and working processes of the thyristor group, voltage and current abnormity is reduced, larger load caused by the opening and closing regulation of the thyristor is reduced, and the normal operation of the voltage regulating module is guaranteed.

Drawings

Fig. 1 is a voltage regulating schematic diagram of a voltage regulating device for a power distribution network provided by the utility model;

fig. 2 is the utility model provides a schematic diagram is opened and close to distribution network voltage regulator's thyristor.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Referring to fig. 1-2, a voltage regulating device for a power distribution network comprises a transformer winding, a measuring component, a microprocessor and a thyristor group, characterized in that the thyristor group comprises three to four groups of thyristors and taps, and the thyristors and the taps are electrically connected, the microprocessor is provided with a power angle calculation, fault identification and control logic module, the control logic module forms a control instruction, the power angle calculation module and the fault identification module are electrically connected with the control logic module, the output end of the measurement component is connected with the microprocessor, a connecting loop is formed among the thyristor assembly, the measuring assembly and the transformer winding, the control logic module is respectively connected with three to four groups of thyristors in series, the three to four groups of thyristors are light-operated thyristors, and the photo-thyristor consists of 4 layers of PINIP2N2, and the measuring range of the measuring component is the voltage and the current of the secondary side of the transformer winding. The measuring assembly comprises a load voltmeter and a load ammeter, the load voltmeter and the load ammeter are connected in series with an output winding of a transformer winding, the measuring assembly further comprises a non-electric quantity sensor, the non-electric quantity sensor is used for a power angle calculation module, a fault identification module is connected with the load voltmeter, the fault identification module is connected with the microprocessor through the load voltmeter, a heat dissipation module is arranged on the outer wall of the thyristor assembly and comprises a heat dissipation fan and a temperature sensor, the temperature sensor is electrically connected with the heat dissipation fan, and a signal end of the temperature sensor is connected with the microprocessor.

In the operation process of the thyristor, after the power source Ea is connected, VT1 and VT2 are in an amplification state, if a positive trigger signal is added to G, K, it is equivalent to a control current IG in a loop between the base and the emitter of VT1, which is the base current IB1 of VT 1. After amplification, VT1 produces collector current IC 1. This current flows out of the base of VT2, becoming the base current of VT 2. Thus, VT2 produces collector current IC2, and IC2 flows into the base of VT1, again amplified. This is repeated in sequence, so that at a moment VT, and V are all turned on and saturated. Therefore, when a positive voltage is applied to the thyristor, it is immediately turned on upon input of a trigger signal. Once the thyristor is turned on, the thyristor can still keep on state even after the trigger signal disappears because the VT1 always flows much larger current on the base than the control electrode current IC. The thyristor can be turned off only by reducing the power supply voltage Ea to make the collector currents of VT1 and VT2 less than a certain minimum value for maintaining conduction.

The working principle is as follows: the distribution network voltage regulating device obtains the voltage and the current of the secondary side of the transformer through the measuring module, the microprocessor completes power angle calculation, fault identification and control instruction formation, the thyristor is switched on and off timely to complete the voltage regulating function, the microprocessor can perform fault identification according to the actual condition of the system voltage, the action of the thyristor is selectively limited or locked, electric arcs and electric parts are avoided during tap switching, the fault rate is low, the maintenance workload is small, measures are taken to dissipate heat and reduce the loss of the thyristor, and the overall reaction speed of the thyristor is improved.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims (7)

1. The utility model provides a distribution network regulator, includes transformer winding, measuring component, microprocessor and thyristor group, its characterized in that, thyristor group includes three to four groups of thyristors and taps, and is connected through the electric property between thyristor and the tap, microprocessor is equipped with merit angle calculation, fault identification and control logic module, control logic module forms control instruction, and through electric connection between merit angle calculation module and fault identification module and the control logic module, measuring component's output and microprocessor are connected, form between thyristor group, measuring component and the transformer winding and connect the return circuit, control logic module establishes ties mutually with three to four groups of thyristors respectively.

2. The voltage regulator device for distribution network of claim 1, wherein three to four groups of said thyristors are photothyristors, and said photothyristors are composed of 4 layers of PINIP2N 2.

3. The voltage regulator apparatus according to claim 1, wherein the measurement range of the measurement component is the voltage and current of the secondary side of the transformer winding.

4. The voltage regulating device for the power distribution network according to claim 1, wherein the measuring assembly comprises an electric load voltmeter and an electric load ammeter, and the electric load voltmeter and the electric load ammeter are connected in series with an output winding of the transformer winding.

5. The voltage regulating device for the power distribution network according to claim 1, wherein the measuring assembly further comprises a non-electrical sensor, and the non-electrical sensor is used for the power angle calculating module.

6. The voltage regulating device for the power distribution network according to claim 1, wherein the fault identification module is connected with a power carrying voltmeter, and the fault identification module is connected with the microprocessor through the power carrying voltmeter.

7. The voltage regulating device for the power distribution network according to claim 1, wherein a heat dissipation module is arranged on the outer wall of the thyristor group, the heat dissipation module comprises a heat dissipation fan and a temperature sensor, the temperature sensor is electrically connected with the heat dissipation fan, and a signal end of the temperature sensor is connected with the microprocessor.

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