CN110988524B

CN110988524B - Automatic function test device of full-automatic recloser formula feeder

Info

Publication number: CN110988524B
Application number: CN201911125760.4A
Authority: CN
Inventors: 马天祥; 贾伯岩; 段昕; 张智远; 沈宏亮; 姬艳鹏; 王庚森; 王卓然
Original assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
Current assignee: State Grid Corp of China SGCC; Electric Power Research Institute of State Grid Hebei Electric Power Co Ltd
Priority date: 2019-11-18
Filing date: 2019-11-18
Publication date: 2021-11-12
Anticipated expiration: 2039-11-18
Also published as: CN110988524A

Abstract

The invention discloses a full-automatic recloser type feeder automation function testing device which comprises a current output unit, a voltage output unit, a switch state unit, a control unit and a wiring terminal, wherein the current output unit, the voltage output unit, the switch state unit and the control unit are all positioned in the device, and the wiring terminal is positioned outside the device. The invention can simulate the actual operation condition and organically combine the switch state, the remote measurement acquisition and the terminal strategy action. The device is small in size and convenient to carry, and can meet the requirements of laboratory and field tests at the same time. The device can satisfy the synchronous simulation of the current fault state and the normal state only by one current source, and has flexible output and lower cost. The device organically combines voltage, current and switch states, can simulate the fault condition of each terminal under the actual distribution network fault state, and is more real in simulation.

Description

Automatic function test device of full-automatic recloser formula feeder

Technical Field

The invention belongs to the technical field of distribution automation, and particularly relates to a full-automatic recloser type feeder automation function testing device.

Background

Distribution automation system relies on feeder automation to realize joining in marriage quick isolation and the self-healing of net trouble, and feeder automation is joining in marriage net fault handling's main mode, mainly divide into centralized type and type on the spot at present, and the type on the spot is divided into intelligent distributing type and recloser formula again. Centralized feeder automation gathers terminal information through main website and synthesizes and judge the trouble position of occurence of failure, and the mutual communication that intelligence distributing type passed through between the terminal realizes fault isolation and self-healing, and the two is higher to communication degree of dependence, and the function application is influenced seriously during communication failure, and the defect recovery time is longer. The recloser feeder automation means that when a fault occurs, through logic cooperation among circuit switches, line fault positioning, isolation and non-fault area power restoration are realized by using a recloser, and the automatic recloser feeder automation can be divided into a voltage time type, a voltage current time type and a self-adaptive synthesis type according to different criteria. How to ensure the correct logic matching between the line switches in the recloser feeder automation becomes the foundation and the premise of the floor application of the recloser feeder automation, and it is very necessary to develop the recloser feeder automation function test.

However, in the current test scheme, a laboratory mainly adopts a physical moving model platform or a digital simulation system to build a real grid structure and develop a terminal logic test, but the simulation platform has a large volume and high environmental requirements, cannot meet the field test requirements, is expensive, and is not suitable for large-area popularization and use; in the field test, a combination mode of a plurality of relay protection instruments and a simulation circuit breaker is adopted more, the functional test is realized by continuously changing the electric quantity output of the relay protection instruments, the mode has the advantages of large equipment quantity, complex operation process and higher requirement on testers, and in addition, the simulation circuit breaker, the output voltage and the output current are disconnected with each other and have larger difference with the actual fault condition.

Therefore, it is desirable to provide a fully automatic recloser feeder automation function testing device that solves the above-mentioned problems.

Disclosure of Invention

The invention aims to provide a full-automatic recloser type feeder automation function testing device which is small in size, convenient to carry, capable of organically combining voltage, current and switch states, capable of simulating fault conditions of all terminals in an actual distribution network fault state, capable of completing function testing through one-key operation and convenient to use. The invention is suitable for recloser-type feeder automatic function test, and can be applied to laboratory test and field test.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a full-automatic recloser type feeder automation function testing device comprises a current output unit, a voltage output unit, a switch state unit, a control unit and a wiring terminal, wherein the current output unit, the voltage output unit, the switch state unit and the control unit are all positioned in the device, and the wiring terminal is positioned outside the device;

as a further improvement of the invention, the external wiring terminal comprises a grounding terminal, a power socket, a device switch, a network socket, four state input ports, four state output ports, four current output interfaces, four voltage output ports, a liquid crystal display screen, a reclosing button, a start test button and a stop test button which are arranged outside the device;

the four state input ports and the four state output ports are called as switch state terminal areas and are electrically connected with the internal switch state unit;

the four current output interfaces are called current terminal areas and are connected with the internal current output unit;

the four voltage output ports are called voltage terminal areas and are connected with the internal voltage output unit;

the network socket, the liquid crystal display screen, the reclosing key, the test starting key and the test stopping key are all connected with the internal control unit;

one side of the device switch is connected with the power socket, and the other side of the device switch is connected with the internal current output unit, the voltage output unit and the control unit.

The grounding terminal is connected with the internal current output unit, the voltage output unit and the control unit.

As a further improvement of the invention, a current output unit loop of the current output unit is supplied with power by 220V mains supply, outputs A, B, C three-phase current through a current conversion module, is controlled by a current switch KI, and is respectively supplied to

current intervals

1, 2, 3 and 4;

when KI is closed, the KI internal power supply side and the load side terminal are conducted, and when KI is disconnected, the KI internal power supply side and the load side terminal are disconnected, and the power supply side terminal is automatically short-circuited.

As a further improvement of the invention, the current interval 1 comprises a normal branch, a fault branch and a current change-over switch, wherein the current transformation ratio of the normal branch is 1: 1; the current transformation ratio of the fault branch circuit is 1: 10; the normal branch and the fault branch are connected to the current switch 1, and switched and output to the current terminals IA1, IB1, IC1 and IN1 of the interval 1 IN the external terminal through the current switch 1.

As a further improvement of the present invention, the current diverter switch is divided into three states: the normal electric flow state, the fault electric flow state and the no-load state, and when the normal branch circuit and the fault branch circuit are switched to the no-load state, the terminals A, B, C, N of the normal branch circuit and the fault branch circuit are short-circuited automatically; when switching to the normal branch, automatically shorting the terminal of the failed branch A, B, C, N; when the fault branch is switched to, the normal branch A, B, C, N terminal is automatically short-circuited;

the

current intervals

2, 3 and 4 are the same as the current interval 1 in structure, and the normal branch and the fault branch of each interval are connected in parallel to an output current line of the current conversion module.

As a further improvement of the invention, a voltage output unit loop of the voltage output unit is supplied by 220V mains supply, A, B, C three-phase voltage is output through a voltage conversion module, and the voltage is controlled by a control switch KU and is transmitted to

voltage intervals

1, 2, 3 and 4.

As a further improvement of the invention, terminals U1A and U1C in the voltage interval 1 are connected with UA and UC buses on the load side of the control switch KU through control switches KU1A and KU1C, and U1B is connected with UB buses on the load side of the control switch KU;

voltage intervals

2, 3 are of the same construction as voltage interval 1.

As a further improvement of the invention, U4A in voltage interval 4 is connected with UA bus on load side of control switch KU through control switch KU4A, and U4B and U4C are connected with UB and UC bus on power side of control switch KU.

As a further improvement of the invention, the loop of the switching state unit is that 1 and 2 ports of an interval 1 analog circuit breaker are used as switching input ports for receiving and executing switching-on and tripping commands of a terminal, 3 and 4 ports of the interval 1 analog circuit breaker are used as switching state output ports for feeding back the switching state of the switch to the terminal and a device control unit;

the

interval

2, 3 and 4 analog breakers have the same structure as the interval 1 analog breaker.

As a further improvement of the invention, the control unit is used for collecting, analyzing and controlling output of the device, and the control logic is as follows:

when the device is in an initial state, KI, KU1A, KU1C, KU2A, KU2C, KU3A, KU3C and KU4A are all disconnected, and the current switch is in an idle position;

when the device is in a normal state, KI, KU1A, KU1C, KU2A, KU2C, KU3A, KU3C and KU4A are all closed, and the current switch is in a normal branch;

when the device is in a fault state, all current change-over switches of current intervals at the upstream of a fault point are in a fault branch circuit;

if the device is in a fault state, after a time t, the trigger switches KU and KI are disconnected, and the time t can be set.

Compared with the prior art, the invention has the following beneficial effects:

1. the method is more suitable for actual operation conditions, and organically combines the switch state, the telemetering collection and the terminal strategy action.

2. The device is small in size and convenient to carry, and can meet the requirements of laboratory and field tests at the same time.

3. The device can satisfy the synchronous simulation of the current fault state and the normal state only by one current source, and has flexible output and lower cost.

4. The device is internally controlled by logic to realize one-key operation to complete function test, is simple to operate, only needs to change a program once the test requirement is changed, and is applicable to logic matching test among various switches.

5. The device organically combines voltage, current and switch states, can simulate the fault condition of each terminal under the actual distribution network fault state, and is more real in simulation.

6. The device can be compatible with automatic testing of feeder automation functions such as voltage time type, self-adaptive type, voltage and current time type, closing quick-break type and the like, and has wide application range.

7. The smart design of KI in the device can avoid frequent start-up of the current conversion module, improve the service life of the module, and prevent the current conversion module from outputting open circuit.

8. The current change-over switch in the device is designed to prevent open circuit, thereby greatly improving the safety of the device.

Drawings

FIG. 1 is a schematic diagram of an overall module of the apparatus of the present invention;

FIG. 2 is a schematic diagram of an external terminal according to the present invention;

FIG. 3 is a schematic diagram of a current output unit circuit of the present invention;

FIG. 4 is a schematic diagram of a voltage output unit circuit of the present invention;

FIG. 5 is a schematic diagram of a switch state unit circuit of the present invention;

fig. 6 is a schematic of the topology of the present invention applied to line switch testing.

Wherein, 1 is a grounding terminal; 2 is a power socket; 3 is a device switch; 4 is a network socket; 5-8 are status input ports of switches 1-4, respectively; 9-12 are status output ports of switches 1-4; 13-16 are current output interfaces of the switches 1-4; 17-20 are voltage output ports of switches 1-4; 21 is a liquid crystal display screen; 22 reclosing key; 23 starting to test the key; the test key is stopped 24.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the application, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

As shown in fig. 1, a full-automatic recloser-type feeder automation function testing device includes a current output unit, a voltage output unit, a switch state unit, a control unit and a connection terminal, wherein the current output unit, the voltage output unit, the switch state unit and the control unit are all located inside the device, and the connection terminal is located outside the device;

as shown in fig. 2, the connection terminal includes a ground terminal 1, a power socket 2, a device switch 3, a network socket 4, four status input ports 5, 6, 7, 8, four

status output ports

9, 10, 11, 12, four

current output ports

13, 14, 15, 16, four

voltage output ports

17, 18, 19, 20, a liquid crystal display 21, a reclosing button 22, a start test button 23, and a stop test button 24;

the four state input ports 5, 6, 7 and 8 and the four

state output ports

9, 10, 11 and 12 are called switch state terminal areas and are electrically connected with the internal switch state unit;

the four current output interfaces 13, 14, 15 and 16 are called current terminal areas and are all connected with the internal current output unit;

the four

voltage output ports

17, 18, 19 and 20 are called voltage terminal areas and are connected with the internal voltage output unit;

the network socket 4, the liquid crystal display 21, the reclosing button 22, the test starting button 23 and the test stopping button 24 are all connected with the internal control unit;

one side of the device switch 3 is connected with the power socket 2, and the other side is connected with the internal current output unit, the voltage output unit and the control unit.

The ground terminal 1 is connected to the internal current output unit, the voltage output unit, and the control unit.

As shown in fig. 3, a current output unit loop of the current output unit is supplied with power by 220V mains supply, outputs A, B, C three-phase currents through a current conversion module, is controlled by a current switch KI, and is respectively supplied to

current intervals

1, 2, 3 and 4;

Further, the current interval 1 comprises a normal branch, a fault branch and a current change-over switch, and the current transformation ratio of the normal branch is 1: 1; the current transformation ratio of the fault branch circuit is 1: 10; the normal branch and the fault branch are connected to the current switch 1, and switched and output to the current terminals IA1, IB1, IC1 and IN1 of the interval 1 IN the external terminal through the current switch 1.

Further, the current transfer switch is divided into three states: the normal electric flow state, the fault electric flow state and the no-load state, and when the normal branch circuit and the fault branch circuit are switched to the no-load state, the terminals A, B, C, N of the normal branch circuit and the fault branch circuit are short-circuited automatically; when switching to the normal branch, automatically shorting the terminal of the failed branch A, B, C, N; when the fault branch is switched to, the normal branch A, B, C, N terminal is automatically short-circuited;

the

current intervals

As shown in fig. 4, a voltage output unit loop of the voltage output unit is powered by 220V mains, outputs A, B, C three-phase voltage through a voltage conversion module, and is controlled by a control switch KU to be transmitted to

voltage intervals

1, 2, 3 and 4.

Furthermore, in the voltage interval 1, terminals U1A and U1C are connected with buses UA and UC on the load side of the control switch KU through control switches KU1A and KU1C, and terminals U1B are connected with a bus UB on the load side of the control switch KU;

voltage intervals

2, 3 are of the same construction as voltage interval 1.

Furthermore, U4A in voltage interval 4 is connected to UA bus of load side of control switch KU via control switch KU4A, and U4B and U4C are connected to UB and UC bus of power side of control switch KU.

As shown in fig. 5, the switching state unit loop of the switching state unit is that the

ports

1 and 2 of the interval 1 analog circuit breaker are switch input ports, which receive and execute the command of closing and tripping of the terminal, and the

ports

3 and 4 of the interval 1 analog circuit breaker are switch state output ports, which feed back the opening and closing state of the switch to the terminal and the device control unit;

the

interval

The control unit is used for collecting, analyzing and controlling output of the device, and the control logic is as follows: the device is divided into an initial state, a normal state and a fault state.

When the device is in a fault state, the current diverter switches for all current intervals upstream of the fault point are in the fault branch.

If the device is in a fault state, after a time t (t can be set, generally set to 300 ms), the trigger switches KU and KI are turned off.

And pressing a test starting button, converting the device from an initial state to a normal state, and after 30S, switching the current change-over switches at adjacent intervals at the upstream of the fault occurrence position from the normal branch to the fault branch.

If the current change-over switch of a certain interval of the device is switched to the fault branch circuit, the current change-over switches of all intervals at the upstream of the interval are triggered to be switched to the fault branch circuit after the time delay of 300ms, and the device is converted to a fault state.

If the state of a certain interval is changed from '1' to '0' (the '1' represents an on bit and the '0' represents a off bit), the current switch of the interval is switched to an 'idle state'.

And if the state of a certain interval X is changed from '0' to '1', triggering the interval voltage control switch KUXC to be closed, switching the current change-over switch to a normal branch (if the interval is a fault upstream adjacent interval, switching the current change-over switch to a fault branch), and closing the downstream interval voltage control switch KU (X + 1) A.

When no current flows through the current switch, the current switch is automatically switched to a no-load state.

When the switches KU1A, KU1C, KU2A, KU2C, KU3A, KU3C and KU4A lose voltage, the switch is tripped and disconnected immediately.

When the device is in the initial state, the coincident key can be pressed, otherwise, the coincident key is in a locking state.

Pressing the coincident key, KU closes, triggering KU1A to close.

Pressing the stop test key, and cutting KI and KU.

The working process of the device applied to the line switch test is as follows:

(1) the line switch being a load switch

The method mainly comprises voltage time type, voltage current time type and self-adaptive feeder automation function tests, a topological schematic diagram of the system is shown in figure 6, and by taking the voltage time type as an example, the device test process is as follows:

the line switches a, b, c and d are respectively corresponding to the voltage, the current, the switch input and the switch output ports of the access devices at intervals of 1, 2, 3 and 4, and the in-station outlet action time t is set. Assuming that a fault occurs at F1, interval 3 is an adjacent interval upstream of the location where the fault occurred. The start test button is pressed.

The device is converted from an initial state to a normal state, and 30S later, the interval 3 current change-over switch is switched from the normal branch to the fault branch.

After the time delay of 300ms, the current change-over switch is switched from the normal branch to the fault branch at intervals of 1 and 2, and the device is converted into a fault state.

After time t, the switches KU and KI are disconnected, no voltage exists on the KU load side, no current exists on the KI load side, so that all the current change-over switches are switched to the no-load state, and all the voltage control switches KU1A, KU1C, KU2A, KU2C, KU3A, KU3C and KU4A trip and disconnect after voltage loss.

And pressing a reclosing key according to the actual operation reclosing time requirement, and starting reclosing.

KU is closed, KU1A is triggered to be closed, after the power supply side of the switch a is powered on, the terminal of the switch a waits for X (terminal internal fixed value) delay, the switch a is controlled to be closed, the switching state of the device interval 1 is changed from '0' to '1', the voltage control switch KU1C of the interval 1 is triggered to be closed, the current change-over switch is switched to a normal branch, and the voltage control switch KU2A of the interval 2 is triggered to be closed.

After the power supply side of the switch b is powered on, the terminal of the switch b waits for X (terminal internal fixed value) to delay, the switch b is controlled to be switched on, the switching state of the device interval 2 is changed from '0' to '1', the voltage control switch KU2C of the interval 2 is triggered to be closed, the current change-over switch is switched to a normal branch, and the voltage control switch KU3A of the interval 3 is triggered to be closed.

After the power supply side of the switch c is powered on, the terminal of the switch c waits for X (terminal internal constant value) to delay, the switch c is controlled to be switched on, the switching state of the device interval 3 is changed from '0' to '1', the voltage control switch KU3C of the trigger interval 3 is closed, the current change-over switch is switched to a fault branch, and the voltage control switch KU4A of the trigger interval 4 is closed.

After a 300ms delay, the current change-over switch is switched to the fault branch circuit at intervals of 1 and 2, and the device is converted into a fault state.

After time t, switches KU, KI are switched off.

And the corresponding terminals of the switches c and d send closing locking signals.

And pressing the reclosing key again according to the actual operation reclosing time requirement to start reclosing.

After the power supply side of the switch c is powered on, the switch c is not closed any more, and the switch d is not closed.

And (6) completing the test.

When the test stopping key is pressed down, the KI and the KU are disconnected, the KI, the KU1A, the KU1C, the KU2A, the KU2C, the KU3A, the KU3C and the KU4A are all disconnected, the current switch is in an idle position, and the device is recovered to the initial state.

(2) The circuit switch being a circuit breaker

Mainly comprises the automatic function test of a switching-on quick-break feeder, which is still illustrated by taking fig. 6 as an example, and the test process of the device is as follows:

After the power supply side of the switch b is powered on, the terminal of the switch b waits for X (terminal internal fixed value) delay, the switch b is controlled to be switched on, the switching state of the device interval 2 is changed from '0' to '1', the voltage control switch KU2C of the interval 2 is triggered to be closed, the current change-over switch is switched to a fault branch, and the voltage control switch KU3A of the interval 3 is triggered to be closed.

At this time, the interval 2 immediately acts to trip after collecting the fault current, the switch state of the interval 2 is changed from '1' to '0', and the current change-over switch is switched to the 'no-load state'.

And (6) completing the test.

The foregoing examples, while indicating preferred embodiments of the invention, are given by way of illustration and description, but are not intended to limit the invention solely thereto; it is specifically noted that those skilled in the art or others will be able to make local modifications within the system and to make modifications, changes, etc. between subsystems without departing from the structure of the present invention, and all such modifications, changes, etc. fall within the scope of the present invention.

Claims

1. The utility model provides a full-automatic recloser formula feeder automation functional test device which characterized in that: the device comprises a current output unit, a voltage output unit, a switch state unit, a control unit and a wiring terminal, wherein the current output unit, the voltage output unit, the switch state unit and the control unit are all positioned in the device, and the wiring terminal is positioned outside the device;

the current output unit loop of the current output unit is supplied with power by 220V mains supply, A, B, C three-phase current is output through the current conversion module, is controlled by a current switch KI and is respectively supplied to current intervals 1, 2, 3 and 4;

when KI is closed, the KI internal power supply side and the load side terminal are conducted, and when KI is disconnected, the KI internal power supply side and the load side terminal are disconnected, and the power supply side terminal is automatically short-circuited;

the current interval 1 comprises a normal branch, a fault branch and a current change-over switch, and the current transformation ratio of the normal branch is 1: 1; the current transformation ratio of the fault branch circuit is 1: 10; the normal branch and the fault branch are connected to the current switch 1, and switched and output to the current terminals IA1, IB1, IC1 and IN1 of the interval 1 IN the external terminal through the current switch 1.

2. The full-automatic recloser feeder automation functionality testing device of claim 1, wherein: the wiring terminal comprises a grounding terminal (1), a power socket (2), a device switch (3), a network socket (4), four state input ports (5, 6, 7 and 8), four state output ports (9, 10, 11 and 12), four current output interfaces (13, 14, 15 and 16), four voltage output ports (17, 18, 19 and 20), a liquid crystal display screen (21), a reclosing key (22), a starting test key (23) and a stopping test key (24);

the four state input ports (5, 6, 7 and 8) and the four state output ports (9, 10, 11 and 12) are called switch state terminal areas and are electrically connected with the internal switch state unit;

the four current output interfaces (13, 14, 15, 16) are called current terminal areas and are connected with the internal current output unit;

the four voltage output ports (17, 18, 19 and 20) are called voltage terminal areas and are connected with the internal voltage output unit;

the network socket (4), the liquid crystal display screen (21), the reclosing button (22), the test starting button (23) and the test stopping button (24) are all connected with the internal control unit;

one side of the device switch (3) is connected with the power socket (2), and the other side of the device switch is connected with the internal current output unit, the voltage output unit and the control unit;

the grounding terminal (1) is connected with the internal current output unit, the voltage output unit and the control unit.

3. The full-automatic recloser feeder automation functionality testing device of claim 1, wherein: the current diverter switch is divided into three states: the normal electric flow state, the fault electric flow state and the no-load state, and when the normal branch circuit and the fault branch circuit are switched to the no-load state, the terminals A, B, C, N of the normal branch circuit and the fault branch circuit are short-circuited automatically; when switching to the normal branch, automatically shorting the terminal of the failed branch A, B, C, N; when the fault branch is switched to, the normal branch A, B, C, N terminal is automatically short-circuited;

the current intervals 2, 3 and 4 are the same as the current interval 1 in structure, and the normal branch and the fault branch of each interval are connected in parallel to an output current line of the current conversion module.

4. The full-automatic recloser feeder automation functionality testing device of claim 1, wherein: a voltage output unit loop of the voltage output unit is supplied with power by 220V mains supply, A, B, C three-phase voltage is output through the voltage conversion module, and the voltage is controlled by the control switch KU and transmitted to the voltage intervals 1, 2, 3 and 4.

5. The full-automatic recloser feeder automation functionality testing device of claim 4, wherein: in the voltage interval 1, terminals U1A and U1C are connected with UA buses and UC buses on the load side of a control switch KU through control switches KU1A and KU1C, and U1B is connected with UB buses on the load side of the control switch KU;

voltage intervals 2, 3 are of the same construction as voltage interval 1.

6. The full-automatic recloser feeder automation functionality testing device of claim 5, wherein: in the voltage interval 4, U4A is connected with UA bus at load side of control switch KU through control switch KU4A, and U4B and U4C are connected with UB and UC bus at power side of control switch KU.

7. The full-automatic recloser feeder automation functionality testing device of claim 1, wherein: the loop of the switching state unit is that ports 1 and 2 of the interval 1 simulation circuit breaker are used as switching input ports for receiving and executing switching-on and tripping commands of a terminal, ports 3 and 4 of the interval 1 simulation circuit breaker are used as switching state output ports for feeding back the switching state of the switch to the terminal and the device control unit;

the interval 2, 3 and 4 analog breakers have the same structure as the interval 1 analog breaker.

8. The full-automatic recloser feeder automation functionality testing device of claim 6, wherein: the control unit is used for collecting, analyzing and controlling output of the device, and the control logic is as follows: