CN115389926A - Intelligent power distribution switch automatic fault self-healing capability detection device - Google Patents

Intelligent power distribution switch automatic fault self-healing capability detection device Download PDF

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Publication number
CN115389926A
CN115389926A CN202211062095.0A CN202211062095A CN115389926A CN 115389926 A CN115389926 A CN 115389926A CN 202211062095 A CN202211062095 A CN 202211062095A CN 115389926 A CN115389926 A CN 115389926A
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China
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voltage
phase
current
transformer
output end
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Chinese (zh)
Inventor
沈晨
杨欢红
张剑
程翔
江成
潘伟杰
李鑫
谢嘉城
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Shanghai University of Electric Power
State Grid Shanghai Electric Power Co Ltd
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Shanghai University of Electric Power
State Grid Shanghai Electric Power Co Ltd
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Priority to CN202211062095.0A priority Critical patent/CN115389926A/en
Publication of CN115389926A publication Critical patent/CN115389926A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
    • G01R29/16—Measuring asymmetry of polyphase networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H1/00—Details of emergency protective circuit arrangements
    • H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

The invention relates to an automatic fault self-healing capability detection device of an intelligent distribution switch, which comprises a direct current input end and an inverter which are connected with each other, wherein the three-phase alternating current output end of the inverter is divided into a current control branch and a voltage control branch, the current control branch comprises a voltage regulator, a three-phase ammeter, a current-applying button, a current-controlling programmable time relay and a primary current transformer which are connected in series, and two ends of a secondary winding of the primary current transformer are respectively connected with a power supply side three-phase output end and a load side three-phase output end; the voltage control branch circuit comprises a no-voltage button, a three-phase voltmeter and a voltage transformer which are connected in parallel, and a low-voltage winding side circuit of the voltage transformer is also connected with a voltage control programmable time relay in series. Compared with the prior art, the intelligent self-healing fault testing device has the advantages of convenience in operation, no need of multi-type cooperation, capability of testing intelligent self-healing fault of the switch, capability of utilizing scrapped mutual inductor equipment and low cost.

Description

Intelligent power distribution switch automatic fault self-healing capability detection device
Technical Field
The invention relates to the field of electric power instruments, in particular to an automatic fault self-healing capability detection device for an intelligent power distribution switch.
Background
The intelligent power distribution switch has a powerful automatic function, can realize reclosing of different types for many times, realizes automatic isolation and recovery of distribution network faults, isolates unrecoverable sections to a minimum range, and integrates analog quantity acquisition, relay protection, a circuit breaker arc extinguishing mechanism and other secondary equipment into a whole, so that the intelligent power distribution switch has many new requirements on testing. And because the intelligent distribution switch is dispersedly installed on the distribution network branch line pole, the difficulty of experiments on the characteristics of the intelligent distribution switch is high, especially the automatic fault self-healing capability test is carried out, and almost no method or habit for carrying out power failure check or live detection on the intelligent distribution switch of an important loop exists, so that if equipment capable of conveniently checking the operation condition of the intelligent distribution switch can be developed, the operation reliability of the distribution network is greatly improved.
The trip scheme based on the large current generator is generally adopted in the prior art, however, the scheme has the following defects that the use is inconvenient, the intelligent power distribution switch is distributed and installed in a large number, the large current generator is very heavy, one 1000A large current generator reaches more than 30 kilograms, great inconvenience is brought to on-site mobile detection operation, in addition, the existing large current generator is convenient to supply power for considering a power supply, single-phase output is realized, three times of tests are needed for the three-phase intelligent power distribution switch, and the inconvenience of operation is increased. Secondly, the real load current change process can not be simulated, and finally, the cost is higher, the switch automatic fault self-healing capability detection device designed based on a large current generator in the prior art needs a primary current transformer with large capacity and an auto-coupling voltage regulator, because the switch automatic fault self-healing capability detection device is a power frequency single-phase inductive element, the copper consumption and the iron consumption are high, the cost is high, the product price of the 1000A specification is more than ten thousand yuan, and more importantly, the intelligent switch also needs a perfect low-voltage tripping function, namely, the circuit can trip after power failure, the problem that the intelligent switch can not trip after power failure is often encountered because the capacity of a storage battery configured in the intelligent switch is very small, if equipment is available, the automatic fault self-healing capability of the intelligent switch can be conveniently tested, and the potential hazard of the intelligent distribution switch can be greatly prevented.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides the automatic fault self-healing capability detection device for the intelligent power distribution switch, which has the advantages of convenience in operation, no need of multi-station matching, capability of carrying out three-phase simultaneous test, capability of utilizing scrapped mutual inductor equipment and low cost.
The purpose of the invention can be realized by the following technical scheme:
an automatic fault self-healing capability detection device for an intelligent distribution switch comprises a direct current input end and an inverter which are connected with each other, wherein a three-phase alternating current output end of the inverter is divided into a current control branch and a voltage control branch, the current control branch comprises a voltage regulator, a three-phase ammeter, a current applying button, a current control programmable time relay and a primary current transformer which are connected in series, one end of a primary winding of the primary current transformer is connected with the current control programmable time relay, and the other end of the primary winding of the primary current transformer is grounded; two ends of a secondary winding of the primary current transformer are respectively connected with a power supply side three-phase output end and a load side three-phase output end; a secondary current transformer and an electric signal timer are also connected in series in a zero-phase loop of the three-phase output end of the voltage regulator, a primary winding of the secondary current transformer is connected with the zero-phase loop of the three-phase output end of the voltage regulator, and a secondary winding of the secondary current transformer is connected with a signal input end of the electric signal timer;
the voltage control branch comprises a no-voltage button, a three-phase voltmeter and a voltage transformer, a low-voltage winding of the three-phase voltmeter and the low-voltage winding of the voltage transformer are connected in parallel with the no-voltage button, a voltage control programmable time relay is further connected in series in a low-voltage winding side circuit of the voltage transformer, common ends of high-voltage windings of the voltage transformer are connected with each other to form a zero phase, and phase line ends are respectively connected with corresponding power supply side three-phase output ends.
Further, the device also comprises a memory alloy current limiter which is connected with the three-phase output end on the power supply side in series.
Furthermore, the memory alloy current limiter is formed by spirally winding a temperature-abrupt reversible memory alloy wire side by side in a compact manner.
Further, current control branch road and voltage control branch road are three-phase circuit, the quantity of no-voltage button, voltage regulator, three-phase ampere meter, three-phase voltmeter, primary current transformer, voltage transformer, power side three-phase output and load side three-phase output is three.
Furthermore, the device converts the power supply of the direct current input end into alternating voltage through the inverter, and after different voltages are set through the three-phase voltage regulator, the current is amplified by the primary current transformer in a reverse connection mode, so that the generation of three-phase test current of the intelligent power distribution switch is realized.
Furthermore, the device converts the power supply at the direct current input end into alternating current voltage through the inverter, and the three-phase test voltage of the intelligent power distribution switch is formed after the alternating current voltage passes through the no-voltage button and is reversely connected and boosted through the voltage transformer.
Furthermore, the device realizes the current and voltage application of various time sequences through three groups of voltage control programmable time relays and three groups of current control programmable time relays, thereby verifying whether the fault type II can be automatically identified under the real scene of the switch or not.
Further, the device detects a three-phase inconsistency or a reduced arc extinguishing capability state by an electric signal timer.
Furthermore, the three-phase output end of the power supply side and the three-phase output end of the load side are used for being hung on two sides of a three-phase fracture of the tested intelligent power distribution switch.
Further, the direct current input end is a direct current low-voltage power supply.
Compared with the prior art, the invention has the following advantages:
(1) The cost is low, and the price is only about one third of the prior art. The invention skillfully utilizes the idle equipment to realize the functions of the step-up transformer and the step-up transformer, the cost is less than one third of the cost of the prior art, and the scrapped idle equipment is fully utilized to achieve the outstanding effects of recycling resources and changing waste into valuable.
(2) The problem of the real fault self-healing capability detection of the intelligent power distribution switch is solved, and the intelligent self-healing capability of the switch can be detected in a three-phase manner. The invention adopts the inverter to realize the output current regulation, because the inverter has the inherent AC-DC-AC conversion function, the common single-phase power supply can be used to generate three-phase detection current, the three-phase simultaneous detection of the three-phase switch can be realized, and the current voltage application of various time sequences can be directly realized through three groups of programmable time relays, thereby verifying whether the fault type can be automatically identified under the real scene of the switch, namely, the automatic multiple reclosing is realized, and the field detection operation efficiency is greatly improved.
(3) Pole climbing tests are not required. The relay protection test of the intelligent power distribution switch needs to climb a pole, however, general secondary professionals do not have the pole climbing aerial work capacity, and maintainers who have the aerial work capacity have professional knowledge that do not have secondary control protection equipment, so that the field test of the intelligent power distribution switch needs to be matched in multiple modes, the work efficiency is very low, and the number of the intelligent power distribution switches is very large, so that a plurality of power supply departments often have no time to check all circuit breakers in the jurisdiction according to schedule, and hidden dangers are caused to the operation in the future.
(4) The real arc extinguishing capability and the three-phase synchronization characteristic of the switch can be detected. The invention skillfully utilizes the capability of simultaneously detecting three phases, detects the synchronism of three-phase actions through the timing of zero-phase current, and fundamentally discovers the potential danger of three-phase inconsistency possibly existing in the switch.
(5) Primary and secondary items may be detected simultaneously. The invention can detect the action time limit and three-phase synchronism of the breaker and the accuracy of the relay protection action through the primary side injection flow, realizes the capability of simultaneously detecting the primary function and the secondary function at one time, and is self-evident to the improvement of the operation efficiency.
(6) The low-voltage power-loss tripping capability of the switch can be directly detected. The intelligent switch still needs perfect low pressure trip function, also can trip after the circuit loses the electricity exactly, because of the battery capacity of intelligent switch internal configuration is very little, often meets the problem that can't trip after losing the electricity, if there is equipment can conveniently test its automatic failure self-healing ability, will can greatly take precautions against intelligent distribution switch's latent hidden danger.
Drawings
Fig. 1 is a schematic structural diagram of an automatic fault self-healing capability detection device for an intelligent power distribution switch according to an embodiment of the present invention;
in the figure, 1, an inverter, 2, a voltage regulator, 3, a primary current transformer, 4, an electric signal timer, 5, a secondary current transformer, 6, a three-phase ammeter, 7, a voltage transformer, 8, a three-phase voltmeter, 10, a power supply side three-phase output end, 11, a load side three-phase output end, 12, a direct current input end, 13, a current-applying button, 14, a voltage-losing button, 15, a memory alloy current limiter, 16, a voltage control programmable time relay, 17 and a current control programmable time relay.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.
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, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
It should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
The invention provides an automatic fault self-healing capability detection device of an intelligent distribution switch, which comprises a direct current input end 12 and an inverter 1 which are connected with each other, wherein the three-phase alternating current output end of the inverter 1 is divided into a current control branch and a voltage control branch, the current control branch comprises a voltage regulator 2, a three-phase ammeter 6, a current button 13, a current control programmable time relay 17 and a primary current transformer 3 which are connected in series, one end of a primary winding of the primary current transformer 3 is connected with the current control programmable time relay 17, and the other end of the primary winding is grounded; two ends of a secondary winding of the primary current transformer 3 are respectively connected with a power supply side three-phase output end 10 and a load side three-phase output end 11; a secondary current transformer 5 and an electric signal timer 4 are also connected in series in a zero-phase loop of the three-phase output end of the voltage regulator 2, a primary winding of the secondary current transformer 5 is connected with the zero-phase loop of the three-phase output end of the voltage regulator 2, and a secondary winding of the secondary current transformer 5 is connected with a signal input end of the electric signal timer 4;
the voltage control branch comprises a no-voltage button 14, a three-phase voltmeter 8 and a voltage transformer 7, low-voltage windings of the three-phase voltmeter 8 and the voltage transformer 7 are connected with the no-voltage button 14 in parallel, a voltage control programmable time relay 16 is further connected in series in a low-voltage winding side circuit of the voltage transformer 7, common ends of high-voltage windings of the voltage transformer 7 are connected with each other to form a zero phase, and phase line ends are respectively connected with corresponding power supply side three-phase output ends 10.
In a preferred embodiment, the device further comprises a memory alloy current limiter 15, the memory alloy current limiter 15 is connected with the three-phase output end 10 on the power supply side in series, and the memory alloy current limiter 15 is formed by spirally and tightly winding a memory alloy wire in a temperature sudden change reversible type side by side. Through the current limitation of the memory alloy, the memory alloy wire is heated and deformed when a large-current switch is switched on to act during testing, the resistance of the ring-shaped memory alloy wire is greatly increased, and the contact damage of the switch during repeated reclosing and fault current can be effectively avoided.
The current control branch and the voltage control branch are three-phase circuits, and the number of the no-voltage button 14, the voltage regulator 2, the three-phase ammeter 6, the three-phase voltmeter 8, the primary current transformer 3, the voltage transformer 7, the power supply side three-phase output end 10 and the load side three-phase output end 11 is three.
The device converts the power supply of a direct current input end 12 into alternating current voltage through an inverter 1, and after different voltages are set through a three-phase voltage regulator 2, the current is amplified by the reverse connection of a primary current transformer 3, so that the generation of three-phase test current of the intelligent power distribution switch is realized.
The device converts the power supply of a direct current input end 12 into alternating current voltage through an inverter 1, and the alternating current voltage is reversely connected and boosted through a voltage transformer 7 through a no-voltage button 14 to form three-phase test voltage of the intelligent power distribution switch.
The device realizes the current and voltage application of various time sequences through three groups of voltage control programmable time relays 16 and three groups of current control programmable time relays 17, thereby verifying whether the fault type can be automatically identified under the real scene of the switch or not.
The device detects the three-phase inconsistency or the arc extinguishing capability reduction state through the electric signal timer 4.
Example 1
Referring to the attached drawing 1, the schematic diagram of the embodiment of the invention is shown, and the invention comprises an inverter 1, a voltage regulator 2, a primary current transformer 3, an electric signal timer 4, a secondary current transformer 5, a three-phase ammeter 6, a voltage transformer 7, a three-phase voltmeter 8, a power supply side three-phase output end 10, a load side three-phase output end 11, a direct current input end 12, an add current button 13 and a no-voltage button 14;
the direct current power supply input end of the inverter 1 is connected with the direct current input end 12, the three-phase alternating current output end is divided into two paths, one path is connected with the input end of the voltage regulator 2, and the other path is connected with the no-voltage button 14; the three-phase output end of the voltage regulator 2 is respectively connected with a three-phase ammeter 6 and a primary winding of the primary current transformer 3 after being connected with a current button 13 in series, a three-phase secondary winding of the primary current transformer 3 is connected with a power supply side three-phase output end 10 and a load side three-phase output end 11, a primary winding of the secondary current transformer 5 is further connected in series in a zero-phase loop of the three-phase output end of the voltage regulator 2, and a secondary winding of the secondary current transformer 5 is connected with a signal input end of the electric signal timer 4. The three-phase no-voltage button 14 is also connected with a low-voltage winding of the three-phase voltage transformer 7 and the three-phase voltmeter 8 in parallel; the common end of the high-voltage winding of the voltage transformer 7 is connected in parallel to a zero phase, and the phase line ends are respectively connected with the three-phase output end 10 at the power supply side. The three-phase voltage transformers 7 are three independent single-phase voltage transformers; the primary current transformer 3 is three independent single-phase current transformers.
The principle of the invention is that the tested intelligent power distribution switch is tripped by using large current, and then whether each action characteristic meets the requirement or not is detected, but the implementation mode is different from the prior art, so that more outstanding beneficial effects are obtained.
The method comprises the steps that firstly, a large number of scrapped current-voltage transformers close to the service life of an electric power enterprise are utilized, the idle equipment is skillfully utilized, the functions of a current-boosting transformer and a step-up transformer are realized, a direct-current low-voltage power supply, such as a 12V storage battery for overhauling a vehicle, is converted into higher alternating-current voltage through an inverter, and after different voltages are set through a three-phase voltage regulator, the current transformers are reversely connected to realize the amplification of current, so that the generation of three-phase test current of the intelligent distribution switch is realized; the intelligent power distribution switch protection has low requirements on voltage, and only low-voltage tripping energy management needs to be verified, so that three-phase voltage is not regulated by using a voltage regulator, and the three-phase test voltage of the intelligent power distribution switch is formed after being reversely connected and boosted by a voltage transformer through a normally closed contact button. In addition, the intelligent self-healing capability of the switch can be detected by a programmable time relay in three phases.
The invention adopts the inverter to realize the output current regulation, because the inverter has the inherent AC-DC-AC conversion function, the common single-phase power supply can be used to generate three-phase detection current, the three-phase simultaneous detection of the three-phase switch can be realized, and the current voltage application of various time sequences can be directly realized through three groups of programmable time relays, thereby verifying whether the fault type can be automatically identified under the real scene of the switch, and the field detection operation efficiency is greatly improved. Because the test current and the test voltage are high-voltage signals injected at the primary side, the secondary equipment is guaranteed to be subjected to the experiment at the same time, the global performance and the high efficiency of the experiment are realized, the scrapped idle equipment is fully utilized, and the outstanding effects of resource cyclic utilization and waste-to-waste conversion are achieved.
The invention adopts the memory alloy current limiter, realizes the memory alloy wire thermal deformation when the large-current switch is switched on to act during the test through the current limitation of the memory alloy, and the resistance of the ring-shaped memory alloy wire is greatly increased, thereby effectively avoiding the contact damage of the switch during the multiple coincidence and fault current.
The invention realizes the detection of the zero-phase current by constructing a three-phase detection loop, and can sensitively reflect the arc extinguishing problem or the three-phase inconsistency problem by timing by an electric signal timer in the zero phase. The intelligent power distribution switch is very convenient to use, and only six signal output ends of three phases need to be hung on two sides of a three-phase fracture of the tested intelligent power distribution switch.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (10)

1. The device for detecting the automatic fault self-healing capability of the intelligent distribution switch is characterized by comprising a direct current input end (12) and an inverter (1) which are connected with each other, wherein a three-phase alternating current output end of the inverter (1) is divided into a current control branch and a voltage control branch, the current control branch comprises a voltage regulator (2), a three-phase ammeter (6), a current adding button (13), a current control programmable time relay (17) and a primary current transformer (3) which are connected in series, one end of a primary winding of the primary current transformer (3) is connected with the current control programmable time relay (17), and the other end of the primary winding is grounded; two ends of a secondary winding of the primary current transformer (3) are respectively connected with a power side three-phase output end (10) and a load side three-phase output end (11); a secondary current transformer (5) and an electric signal timer (4) are also connected in series in a zero-phase loop of the three-phase output end of the voltage regulator (2), a primary winding of the secondary current transformer (5) is connected with the zero-phase loop of the three-phase output end of the voltage regulator (2), and a secondary winding of the secondary current transformer (5) is connected with a signal input end of the electric signal timer (4);
the voltage control branch circuit comprises a no-voltage button (14), a three-phase voltmeter (8) and a voltage transformer (7), low-voltage windings of the three-phase voltmeter (8) and the voltage transformer (7) are connected with the no-voltage button (14) in parallel, a voltage control programmable time relay (16) is further connected in series in a low-voltage winding side circuit of the voltage transformer (7), a common end of a high-voltage winding of the voltage transformer (7) is connected into a zero phase, and a phase end is connected with a corresponding power side three-phase output end (10) respectively.
2. The automatic fault self-healing capability detection device for the intelligent power distribution switch according to claim 1, wherein the device further comprises a memory alloy current limiter (15), and the memory alloy current limiter (15) is connected in series with the power supply side three-phase output end (10).
3. The automatic fault self-healing capability detection device for the intelligent power distribution switch according to claim 2, wherein the memory alloy current limiter (15) is formed by spirally winding a reversible memory alloy wire with a temperature jump side by side in a tight manner.
4. The automatic fault self-healing capability detection device for the intelligent power distribution switch according to claim 1, wherein the current control branch and the voltage control branch are three-phase lines, and the number of the no-voltage button (14), the voltage regulator (2), the three-phase ammeter (6), the three-phase voltmeter (8), the primary current transformer (3), the voltage transformer (7), the power side three-phase output end (10) and the load side three-phase output end (11) is three.
5. The automatic fault self-healing capability detection device for the intelligent power distribution switch according to claim 1, wherein the device converts a power supply at a direct current input end (12) into an alternating current voltage through an inverter (1), and after different voltages are set through a three-phase voltage regulator (2), a primary current transformer (3) is connected in a reverse mode to amplify the current, so that three-phase test current of the intelligent power distribution switch is generated.
6. The automatic fault self-healing capability detection device for the intelligent power distribution switch according to claim 1, wherein the device converts a power supply at a direct current input end (12) into an alternating current voltage through the inverter (1), and the three-phase test voltage of the intelligent power distribution switch is formed after the alternating current voltage passes through a no-voltage button (14) and is reversely connected and boosted through a voltage transformer (7).
7. The automatic fault self-healing capability detection device for the intelligent power distribution switch according to claim 1, wherein the device realizes current and voltage application of various time sequences through three groups of voltage control programmable time relays (16) and three groups of current control programmable time relays (17), so as to verify whether a fault type can be automatically identified under a real scene of the switch or not through automatic multiple reclosure.
8. The automatic fault self-healing capability detection device for the intelligent power distribution switch according to claim 1, wherein the device detects a three-phase inconsistency or a reduced arc extinguishing capability state through an electric signal timer (4).
9. The automatic fault self-healing capability detection device for the intelligent power distribution switch according to claim 1, wherein the power side three-phase output end (10) and the load side three-phase output end (11) are used for being hung on two sides of a three-phase fracture of the tested intelligent power distribution switch.
10. The automatic fault self-healing capability detection device for the intelligent power distribution switch according to claim 1, wherein the dc input terminal (12) is a dc low-voltage power supply.
CN202211062095.0A 2022-08-31 2022-08-31 Intelligent power distribution switch automatic fault self-healing capability detection device Pending CN115389926A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211062095.0A CN115389926A (en) 2022-08-31 2022-08-31 Intelligent power distribution switch automatic fault self-healing capability detection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211062095.0A CN115389926A (en) 2022-08-31 2022-08-31 Intelligent power distribution switch automatic fault self-healing capability detection device

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CN115389926A true CN115389926A (en) 2022-11-25

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