Substation screen top miniature bus wiring device and operation method thereof

Abstract

The invention provides a substation screen top miniature bus wiring device and an operation method thereof, and the wiring device comprises a miniature bus input and output lap joint port which is disposed on the surface of a cabinet, a wiring detection module which is connected with the miniature bus input and output lap joint port, and a state indication window which is connected with the wiring detection module. And the small bus input and output lapping interfaces are respectively connected to the access points and the access points of the corresponding small buses through external lapping cables, lapping of the corresponding small buses is established, voltage information of the small buses connected to the small bus input and output lapping interfaces is received, wiring detection is performed according to the voltage information, and a wiring detection result is displayed. According to the invention, phase checking work does not need to be executed before bridging, wiring accuracy detection can be automatically carried out according to the access condition after the access point and the access-out point of the miniature bus needing bridging are accessed, and phase checking is realized while wiring accuracy detection is carried out.

Description

Technical Field

[0001] The invention relates to the technical field of transformer substation maintenance, in particular to a transformer substation panel top small busbar wiring device and an operation method thereof. Background Art

[0002] With the rapid development of technologies such as automation and network communications, the speed of substation secondary system updates and iterations is accelerating, and the number of substation renovation and expansion projects is also increasing year by year. The top of the substation protection screen has multiple small busbars, which are used to realize the sharing of AC and DC power between each screen, reducing the number of secondary cables laid between each screen. During the expansion and renovation of the secondary panel cabinet in the substation renovation and expansion project, it is necessary to perform a jumper operation on the small busbar on the top of the screen to maintain the continuity and safety of the corresponding circuit of the substation protection screen. Most of the traditional substation screen top small busbar jumpering requires manual phase checking of each busbar one by one, and then it is achieved by installing and removing short-circuiting wires. The efficiency and accuracy of the jumper cannot be guaranteed. Once the phase checking is completed, if there is a wrong connection, it will also cause operational safety problems for the power grid and equipment. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art that when performing a jumper operation on a small busbar on a screen top, it is necessary to manually check the phases of the busbars one by one, and then jumper the busbars by installing and removing short-circuit wires, and the jumper efficiency and accuracy cannot be guaranteed, which easily leads to operational safety problems of power grids and equipment. A small busbar wiring device on a substation screen top and an operating method thereof are provided, and a small busbar input and output interface is provided. There is no need to perform phase checking before jumpering. After accessing the access point and the access point of the small busbar that needs to be jumped, the wiring accuracy can be automatically detected according to the access situation, and the phase checking can be achieved while the wiring accuracy detection is being performed.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] The substation panel top small busbar connection device includes a chassis and external bonding cables, and also includes:

[0006] The small busbar input and output bonding interface is arranged on the surface of the chassis and is used to respectively connect to the access point and the output point of the corresponding small busbar through the external bonding cable to establish the bonding of the corresponding small busbar;

[0007] The wiring detection module is connected to the small bus input and output interface, and is used to receive the voltage information of the small bus connected to the small bus input and output interface, and perform wiring detection according to the voltage information;

[0008] The status indication window is connected to the wiring detection module and is used to display the wiring detection results.

[0009] The purpose of the traditional manual phase checking operation in the small busbar jumper on the top of the substation is essentially to ensure the accuracy of the jumper wiring. However, in the small busbar jumper work on the top of the substation, there are mostly multiple busbar jumper requirements. If the connection operation is performed after the phase is checked, there will still be misconnections, affecting the safe operation of the power grid and equipment. By setting up the small busbar input and output jumper interface, the input and output ends of the small busbar that needs to be jumped are directly connected, and the wiring accuracy is tested after the connection. By adjusting the operation sequence, the wiring errors after the phase check can be avoided, and the safety of the small busbar jumper operation can be further improved. In addition, a status indication window is set, and even if there is a wiring error, a prompt can be issued in time to correct the wiring error.

[0010] Furthermore, the small busbar input and output bonding interface includes a three-phase AC voltage input and output bonding interface, a single-phase AC voltage input and output bonding interface and a DC voltage input and output bonding interface, and each input and output bonding interface includes at least two connection terminals for connecting external bonding cables.

[0011] According to different situations of small bus output voltage, different input and output interface types are set, which can be selected according to needs to achieve connection.

[0012] Further, the wiring detection module includes a DC detection unit, and the DC detection unit includes:

[0013] A DC step-down circuit is connected to the DC voltage input and output interface, and is used to collect the DC voltage at the input side and the output side of the DC voltage input and output interface, and perform a step-down process;

[0014] A comparison operational amplifier circuit is connected to the DC step-down circuit to compare the voltage after the step-down process, and obtain the voltage difference on the input side of the DC voltage input-output interface, the voltage difference on the output side, and the voltage difference between the input side and the output side;

[0015] The DC wiring detection circuit is connected to the comparison operational amplifier circuit and is used for detecting the DC wiring misconnection according to the voltage difference.

[0016] The small bus voltage is mainly divided into two types: DC and AC. For DC wiring, the voltage difference between each phase corresponding to the access side and the output side should be fixed, and the voltage on the same phase between the two sides should be the same. By identifying the voltage value presented on each terminal connected, the accuracy of the current wiring can be judged. In order to improve the efficiency of judgment and identification, it is reduced in voltage, and the voltage after the voltage reduction is further compared through the comparison op amp circuit to intuitively obtain the voltage difference, thereby realizing the detection of the corresponding wiring on the access side, the output side and the two sides.

[0017] Furthermore, the wiring detection module further includes an AC detection unit, and the AC detection unit includes:

[0018] The AC step-down circuit is connected to the AC voltage input and output interface, and is used to collect the phase voltages of the input side and the output side of the three-phase AC voltage input and output interface and the single-phase AC voltage input and output interface, and perform voltage reduction processing;

[0019] A voltage phase identification circuit is connected to the AC step-down circuit and is used to identify the voltage phases of the input side and the output side of the three-phase AC voltage input and output interface and the single-phase AC voltage input and output interface respectively;

[0020] The AC wiring detection circuit is connected to the AC step-down circuit and the voltage phase identification circuit, and is used for detecting AC wiring misconnection according to the phase voltage and the voltage phase.

[0021] For the AC voltage in the small busbar, when identifying the wiring accuracy, the judgment condition should include the voltage phase in addition to the voltage amplitude. Therefore, when identifying the wiring condition of the AC part, in addition to collecting the corresponding phase voltage, the corresponding voltage phase is further identified, and the AC wiring detection is realized by combining the phase voltage and voltage phase to ensure the accuracy of the wiring detection results.

[0022] Furthermore, the substation top small busbar connection device also includes:

[0023] The overlapping control switch is arranged between the input side and the output side of the small bus input and output overlapping interface, connected to the wiring detection module, and used for performing overlapping control of the small bus according to the wiring detection result of the wiring detection module.

[0024] In order to ensure the safety of small busbar splicing, after obtaining the wiring detection results, the splicing control of the small busbar is implemented through the splicing control switch to avoid splicing of the small busbar in the case of incorrect wiring.

[0025] The operation method of the substation panel top small busbar connection device comprises:

[0026] Obtain the target splicing busbar, and select the access point and the exit point of the target splicing busbar;

[0027] Connect the target tapped busbars to the busbar input and output tapping interfaces respectively, and perform wiring detection based on the voltage information on the busbar input and output tapping interfaces;

[0028] When it is detected that the connection of the access point and the connection point of the target overlapping busbar is correct, the overlapping of the target overlapping busbar is established through the overlapping control switch.

[0029] Further, the wiring detection is performed according to the voltage information on the small bus input and output connection interface, including:

[0030] Respectively obtain the voltage difference between each two phases on the input side of the DC voltage input and output interface and the voltage difference between each two phases on the output side;

[0031] comparing the voltage difference with a standard voltage difference determined according to the corresponding terminal type;

[0032] When the voltage difference is inconsistent with the standard voltage difference, it is determined that there is a wiring error;

[0033] When the voltage difference is consistent with the standard voltage difference, the voltage difference between the same terminal types on the input side and the output side is obtained;

[0034] If the voltage difference between the same terminal type on the input side and the output side is zero, the wiring is judged to be correct;

[0035] If the voltage difference between the same terminal type on the input and output sides is not zero, it is judged that there is a wiring error.

[0036] Furthermore, the wiring detection according to the voltage information on the small bus input and output interface also includes:

[0037] Obtain the phase voltage and phase difference between the input side and the output side of the three-phase AC voltage input and output interface, and the phase voltage and phase difference between the input side and the output side of the single-phase AC voltage input and output interface;

[0038] Compare the phase voltage and phase difference with the corresponding standard phase voltage value and standard phase difference value determined according to the target overlapping small bus type;

[0039] When the phase voltage is inconsistent with the standard phase voltage value, and / or the phase difference is inconsistent with the standard phase difference value, it is determined that there is a wiring error;

[0040] When the phase voltage is consistent with the standard phase voltage value, and the phase difference is consistent with the standard phase difference value, compare the phase difference value between the same terminal types on the input side and the output side;

[0041] If the voltage difference between the same terminal type on the input side and the output side is zero, the wiring is judged to be correct;

[0042] If the voltage difference between the same terminal type on the input side and the output side is not zero, it is judged that there is a wiring error.

[0043] Furthermore, the operation method of the substation panel top small busbar connection device also includes:

[0044] When it is detected that there is a wiring error at the access point and the access point of the target spliced ​​busbar, the terminal with the wiring error and the corresponding abnormal voltage information are displayed through the status indication window.

[0045] The information displayed in the status indication window can intuitively obtain the wiring error situation, and can quickly identify the cause of the wiring error based on the abnormal voltage information, so as to correct the wiring error in time and ensure that the small busbar connection can be carried out normally.

[0046] The beneficial effects of the present invention are:

[0047] (1) Set up a small busbar input and output interface to directly connect the input and output ends of the small busbar to be bridged. After the connection, check the wiring accuracy. By adjusting the operation sequence, avoid wiring errors after phase checking, and further improve the safety of small busbar jumper operation. A status indication window is set up, so that even if there is a wiring error, prompts can be issued in time to correct the wiring error.

[0048] (2) In order to ensure the safety of busbar splicing, after obtaining the wiring detection results, the splicing control of the busbar is implemented through the splicing control switch to avoid splicing of the busbar in the case of incorrect wiring.

[0049] (3) Through the information displayed in the status indication window, the wiring error situation can be intuitively obtained, and the cause of the wiring error can be quickly identified based on the abnormal voltage information, so that the wiring error can be corrected in time to ensure that the small busbar connection can be carried out normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a structural schematic diagram of the present invention;

[0051] Figure 2 is a structural schematic diagram of a DC detection unit according to an embodiment of the present invention;

[0052] Figure 3 is a circuit diagram of a DC step-down circuit according to an embodiment of the present invention;

[0053] Figure 4 is a circuit diagram of a comparison operational amplifier circuit according to an embodiment of the present invention;

[0054] Figure 5 is a structural schematic diagram of an AC detection unit according to an embodiment of the present invention;

[0055] Figure 6 1 is a circuit diagram of an AC step-down circuit corresponding to the A-phase output in the three-phase AC positive output of an embodiment of the present invention;

[0056] Figure 7 It is a schematic diagram of a process of the present invention.

[0057] Wherein: 1. chassis, 11. small busbar input and output interface, 111. three-phase AC voltage input and output interface, 112. single-phase AC voltage input and output interface, 113. DC voltage input and output interface, 12. wiring detection module, 121. DC detection unit, 121a. DC step-down circuit, 121b. comparison amplifier circuit, 121c. DC wiring detection circuit, 122. AC detection unit, 122a. AC step-down circuit, 122b. voltage phase identification circuit, 122c. AC wiring detection circuit, 13. status indication window, 14. bonding control switch, 2. external bonding cable, 3. small busbar, 31. access point, 32. access point. DETAILED DESCRIPTION

[0058] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0059] Example:

[0060] Substation panel top small busbar connection device, such as Figure 1 As shown, it includes a chassis 1 and an external bonding cable 2, and also includes:

[0061] The small busbar input and output bonding interface 11 is arranged on the surface of the chassis and is used to respectively connect the access point 31 and the output point 32 of the corresponding small busbar 3 through an external bonding cable to establish the bonding of the corresponding small busbar;

[0062] The wiring detection module 12 is connected to the small bus input and output interface, and is used to receive the voltage information of the small bus connected to the small bus input and output interface, and perform wiring detection according to the voltage information;

[0063] The status indication window 13 is connected to the wiring detection module and is used to display the wiring detection result.

[0064] The wiring of the small busbar connection mainly includes the DC part and the AC part. The DC part includes the DC positive output DC+, the DC negative output DC- and the ground output GND, while the AC part includes the three-phase AC positive output, the three-phase AC negative output N1, the single-phase AC positive output L and the single-phase AC negative output N.

[0065] Among them, the three-phase AC positive output consists of A phase output, B phase output and C phase output.

[0066] Since the connection of the small busbars on the top of the substation is not static, but changes with the design, expansion, renovation and equipment update of the substation, in actual operation, it is necessary to determine the connection method and quantity of the small busbars on the top of the substation according to the specific situation and needs of the substation.

[0067] For example, when the substation uses DC control, DC closing and other operations, it is necessary to introduce DC power to each control panel and protection panel through the small busbar on the top of the panel, and the DC part needs to be spliced. When it is necessary to provide AC power to auxiliary equipment such as lighting and power in the substation, or when some equipment or systems in the substation need external AC power for testing, debugging or maintenance, it is necessary to splice the AC part.

[0068] Therefore, different types of input and output interfaces are set up to meet the different connection requirements of the small busbars on the top of the substation.

[0069] Specifically, the small busbar input and output connection interface includes a three-phase AC voltage input and output connection interface 111, a single-phase AC voltage input and output connection interface 112 and a DC voltage input and output connection interface 113, and each input and output connection interface includes at least two connection terminals for connecting external connection cables.

[0070] In order to improve the portability and intuitiveness of wiring, for the small busbar input and output interfaces, corresponding signs are set at the corresponding wiring terminals according to the corresponding types.

[0071] For a three-phase AC voltage input and output interface, it is necessary to add the three-phase AC voltage and input labels to the input side of the three-phase AC voltage input and output interface, and add A, B, C and N labels to each wiring terminal.

[0072] Among them, when connecting with the access point and the outlet point of the small busbar through the external bonding cable, the connection can be achieved by plug-in type, bolt type and the like.

[0073] Since the wiring inspection basis of the AC part and the DC part is different, the voltage difference between each phase corresponding to the incoming side and the outgoing side of the DC wiring should be fixed, and the voltage on the same phase between the two sides should be the same. The wiring inspection basis of the AC wiring should include the voltage phase in addition to the voltage amplitude.

[0074] Therefore, corresponding AC detection units and DC detection units are provided for the AC part and the DC part, respectively.

[0075] Specifically, the wiring detection module includes a DC detection unit 121, and the DC detection unit is as follows: Figure 2 As shown, including:

[0076] The DC voltage step-down circuit 121a is connected to the DC voltage input and output interface, and is used to collect the DC voltage at the input side and the output side of the DC voltage input and output interface, and perform voltage step-down processing;

[0077] The comparison amplifier circuit 121b is connected to the DC step-down circuit, and is used to compare the voltage after the step-down process, and obtain the voltage difference on the input side of the DC voltage input-output interface, the voltage difference on the output side, and the voltage difference between the input side and the output side;

[0078] The DC wiring detection circuit 121c is connected to the comparison amplifier circuit and is used for detecting the DC wiring misconnection according to the voltage difference.

[0079] The DC step-down circuit is as follows: Figure 3 As shown, it includes resistors R1-R10, an electronic access component U1, a voltage isolation chip U2, a comparator U3 and voltage zener diodes ZD1-ZD2, and in this embodiment, the ACPL-C87BT-000E chip is used as the voltage isolation chip U2.

[0080] The DC voltage of the DC voltage input and output interface is connected to the +VOUT of the electronic access component U1. Through the processing of the voltage isolation chip U2, the comparator U3, the Zener diode ZD1 and the Zener diode ZD2, the DC voltage of 110V can be stepped down to 5V.

[0081] Comparison amplifier circuit such as Figure 4 As shown, it includes an operational amplifier AR1 and resistors R11-R14.

[0082] When in use, the DC voltage is input to the output interface respectively, and the voltages of the two terminals that need to be compared are input to U-IN1 and U-IN2 respectively. After calculation by the operational amplifier AR1, the voltage difference is output from U-OUT.

[0083] The wiring detection module also includes an AC detection unit 122. Figure 5 As shown, including:

[0084] The AC step-down circuit 122a is connected to the AC voltage input and output interface, and is used to collect the phase voltages of the input side and the output side of the three-phase AC voltage input and output interface and the single-phase AC voltage input and output interface, and perform voltage reduction processing;

[0085] The voltage phase identification circuit 122b is connected to the AC step-down circuit and is used to identify the voltage phases of the input side and the output side of the three-phase AC voltage input-output interface and the single-phase AC voltage input-output interface respectively;

[0086] The AC wiring detection circuit 122c is connected to the AC step-down circuit and the voltage phase identification circuit, and is used to perform AC wiring misconnection detection based on the phase voltage and the voltage phase.

[0087] In this embodiment, a plurality of AC step-down circuits are provided, each of which corresponds to one AC positive output and performs voltage reduction processing on the output voltage.

[0088] Take the AC step-down circuit corresponding to the A phase output in the three-phase AC positive output as an example. Figure 6 As shown, it includes a resistor group R15-R22, a step-down transformer PT1, and capacitors C1-C3.

[0089] The A-phase output is input from the UA terminal, stepped down by the step-down transformer PT1, and then output from the V2A terminal.

[0090] In this embodiment, the ATT7022E chip and its basic circuit are used as a voltage phase identification circuit, which can identify the specific phase of the input voltage.

[0091] The DC wiring detection circuit and AC wiring detection circuit in the wiring detection module can be microprocessors such as MCU, which can analyze the calculated voltage information, phase information, etc. to achieve corresponding wiring misconnection detection.

[0092] In addition, a tapping control switch 14 is also provided in the substation panel top small busbar connection. The tapping control switch is arranged between the input side and the output side of the small busbar input and output tapping interface, and is connected to the wiring detection module, and is used to perform the tapping control of the small busbar according to the wiring detection result of the wiring detection module.

[0093] The tapping control switch can be a main switch or a main switch and a sub-switch. It can control the tapping control of the corresponding small busbar according to the wiring detection result of the wiring detection module. It is closed only when the wiring detection module determines that the wiring is correct to realize the tapping control of the small busbar. In other cases, it remains in the open state to avoid incorrect tapping and ensure the safety of power grid operation.

[0094] Another aspect of this embodiment further provides an operation method of the substation panel top small busbar connection device, such as Figure 7 As shown, including:

[0095] Obtain the target splicing busbar, and select the access point and the exit point of the target splicing busbar;

[0096] Connect the target tapped busbars to the busbar input and output tapping interfaces respectively, and perform wiring detection based on the voltage information on the busbar input and output tapping interfaces;

[0097] When it is detected that the connection of the access point and the connection point of the target overlapping busbar is correct, the overlapping of the target overlapping busbar is established through the overlapping control switch.

[0098] When applying the substation screen top small busbar connection device, it is necessary to first determine the small busbars that need to be spliced, and then select specific access points and exit points based on factors such as splicing requirements and safety distance.

[0099] Based on the splicing requirements, establish connections between the access point and the small busbar input and output splicing interface, as well as the connection between the access point and the small busbar input and output splicing interface according to the external splicing cables.

[0100] After the connection is achieved, the terminal connection on the input side of the busbar input and output interface, the terminal connection on the output side, and the corresponding connected busbars on the input and output sides are identified to be accurate. When all three are accurate, close the overlapping control switch to establish the overlapping of the target busbar.

[0101] Among them, for the accurate identification of the terminal connection on the input side of the small busbar input and output interface, the terminal connection on the output side, and the corresponding small busbar connections on the input side and the output side, since the judgment basis for the DC part and the AC part is different, different wiring detection methods are used for the DC part and the AC part.

[0102] For the DC part, the wiring detection is carried out according to the voltage information on the input and output interface of the small busbar, including:

[0103] Respectively obtain the voltage difference between each two phases on the input side of the DC voltage input and output interface and the voltage difference between each two phases on the output side;

[0104] comparing the voltage difference with a standard voltage difference determined according to the corresponding terminal type;

[0105] When the voltage difference is inconsistent with the standard voltage difference, it is determined that there is a wiring error;

[0106] When the voltage difference is consistent with the standard voltage difference, the voltage difference between the same terminal types on the input side and the output side is obtained;

[0107] If the voltage difference between the same terminal type on the input side and the output side is zero, the wiring is judged to be correct;

[0108] If the voltage difference between the same terminal type on the input and output sides is not zero, it is judged that there is a wiring error.

[0109] The DC part specifically includes three lines: DC positive output DC+, DC negative output DC- and ground output GND. Since the position of each terminal in the small bus input and output interface is fixed, although the voltage polarities of the DC positive output DC+ and the DC negative output DC- are different, the voltage amplitudes are the same and the same DC step-down circuit is used, the step-down multiples are consistent, which proves that the voltage difference between different terminals is fixed.

[0110] Taking the voltage of the DC part after voltage reduction as DC positive output DC+5V, DC negative output DC-5V and ground output GND0V as an example, since the comparison amplifier circuit for calculating the voltage difference uses an operational amplifier, the voltage difference output value calculated according to the corresponding terminal of the DC positive output DC+ and the DC negative output DC should be 0V, the voltage difference output value of the DC positive output DC+ and the corresponding terminal of the ground output GND should be 5V, and the voltage difference output value of the DC negative output DC- and the corresponding terminal of the ground output GND should be -5V, and this is the standard voltage difference value of the same side terminal connection. Then compare the calculated actual voltage difference value with the corresponding standard voltage difference value.

[0111] If the voltage difference output value between the two terminals is different from the expected standard voltage difference value, it proves that there is an abnormality in the terminal connection.

[0112] If the voltage difference output value between the two terminals is the same as the expected standard voltage difference, it proves that the connection is correct.

[0113] After the connections of the terminals on the input and output sides are accurate, the identities of both sides are identified to determine whether the corresponding small busbars on the input and output sides are connected accurately.

[0114] If the corresponding small busbars on the input and output sides are connected accurately, the voltage values ​​displayed by the terminals of the same terminal type should be the same. Therefore, if the voltage difference calculated between each pair of terminals of the same terminal type is 0, it can be determined that the current wiring is correct. In other cases, it can be considered that there is an error in the wiring.

[0115] Similarly, the wiring detection of the AC part also includes the terminal connection on the input side, the terminal connection on the output side, and the accurate identification of the corresponding small busbars on the input and output sides. However, in addition to the voltage amplitude, the voltage phase also needs to be considered in the wiring of the AC part.

[0116] For the AC part, the wiring detection is performed according to the voltage information on the input and output interfaces of the small busbar, and also includes:

[0117] Obtain the phase voltage and phase difference between the input side and the output side of the three-phase AC voltage input and output interface, and the phase voltage and phase difference between the input side and the output side of the single-phase AC voltage input and output interface;

[0118] Compare the phase voltage and phase difference with the corresponding standard phase voltage value and standard phase difference value determined according to the target overlapping small bus type;

[0119] When the phase voltage is inconsistent with the standard phase voltage value, and / or the phase difference is inconsistent with the standard phase difference value, it is determined that there is a wiring error;

[0120] When the phase voltage is consistent with the standard phase voltage value, and the phase difference is consistent with the standard phase difference value, compare the phase difference value between the same terminal types on the input side and the output side;

[0121] If the voltage difference between the same terminal type on the input side and the output side is zero, the wiring is judged to be correct;

[0122] If the voltage difference between the same terminal type on the input side and the output side is not zero, it is judged that there is a wiring error.

[0123] The phase voltages between phases A, B, C and N of the three-phase AC voltage are the same, and the AC step-down circuits used in each phase are consistent, with the same step-down multiples, and the phase voltages displayed after step-down should also be the same. Since the terminal positions of each phase of the three-phase AC voltage are also fixed, when the calculated phase voltage value is different from the set standard phase voltage value, it can be determined that there is a wiring error. The standard phase voltage value can be set according to the step-down multiple of the AC step-down circuit and the AC voltage amplitude of the small bus output.

[0124] And the phase difference between any two phases of phase A, phase B and phase C should be 120°, and there is a difference between positive and negative with the comparison object. That is, the phase difference between phase A and phase B is 120°, the phase difference between phase A and phase C is -120°, and the phase difference between phase B and phase C is 120°. If the calculated phase difference between the two terminals is different from the predetermined standard phase difference value, it can be determined that there is a wiring abnormality. If the calculated phase differences are all consistent with the corresponding standard phase difference value system, it can be determined that the connection on one side is accurate.

[0125] After confirming that the connection of each terminal on the input side and the output side is accurate, the identities of both sides are identified to determine whether the corresponding small busbars on the input side and the output side are connected accurately.

[0126] Since the input side and the output side correspond one to one, the voltage amplitude and phase need to be kept consistent. When the connection accuracy of the terminals on one side is detected, it has been confirmed that the connection of each phase is accurate. Therefore, as long as the voltage amplitude between terminals of the same terminal type is determined to be consistent, the conclusion that the wiring is accurate can be obtained.

[0127] In order to ensure timely adjustment of wiring errors, when wiring errors are detected at the access points and outlet points of the target spliced ​​busbar, the incorrectly wired terminals and corresponding abnormal voltage information are displayed through the status indication window.

[0128] The abnormal voltage information includes information such as the voltage, phase, voltage difference, and phase difference corresponding to the terminal with incorrect wiring, which can intuitively display the error type and optimize subsequent adjustment efficiency.

[0129] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. A small busbar connection device on the top of a substation screen, including a chassis and external bonding cables, characterized in that: Also includes: The small busbar input and output bonding interface is arranged on the surface of the chassis and is used to respectively connect to the access point and the output point of the corresponding small busbar through the external bonding cable to establish the bonding of the corresponding small busbar; The wiring detection module is connected to the small bus input and output interface, and is used to receive the voltage information of the small bus connected to the small bus input and output interface, and perform wiring detection according to the voltage information; The status indication window is connected to the wiring detection module and is used to display the wiring detection results.

2. The substation top small busbar connection device according to claim 1 is characterized in that: The small busbar input and output connection interface includes a three-phase AC voltage input and output connection interface, a single-phase AC voltage input and output connection interface and a DC voltage input and output connection interface, and each input and output connection interface includes at least two connection terminals for connecting external connection cables.

3. The substation panel top small busbar connection device according to claim 2 is characterized in that: The wiring detection module includes a DC detection unit, and the DC detection unit includes: A DC step-down circuit is connected to the DC voltage input and output interface, and is used to collect the DC voltage at the input side and the output side of the DC voltage input and output interface, and perform a step-down process; A comparison operational amplifier circuit is connected to the DC step-down circuit to compare the voltage after the step-down process, and obtain the voltage difference on the input side of the DC voltage input-output interface, the voltage difference on the output side, and the voltage difference between the input side and the output side; The DC wiring detection circuit is connected to the comparison operational amplifier circuit and is used for detecting the DC wiring misconnection according to the voltage difference.

4. The substation top small busbar connection device according to claim 2 is characterized in that: The wiring detection module further includes an AC detection unit, and the AC detection unit includes: The AC step-down circuit is connected to the AC voltage input and output interface, and is used to collect the phase voltages of the input side and the output side of the three-phase AC voltage input and output interface and the single-phase AC voltage input and output interface, and perform voltage reduction processing; A voltage phase identification circuit is connected to the AC step-down circuit and is used to respectively identify the voltage phases on the input side and the output side of the three-phase AC voltage input-output interface and the single-phase AC voltage input-output interface; an AC wiring detection circuit is connected to the AC step-down circuit and the voltage phase identification circuit and is used to perform AC wiring misconnection detection based on the phase voltage and the voltage phase.

5. The substation panel top small busbar connection device according to claim 1, characterized in that: Also includes: The overlapping control switch is arranged between the input side and the output side of the small bus input and output overlapping interface, connected to the wiring detection module, and used for performing overlapping control of the small bus according to the wiring detection result of the wiring detection module.

6. The operation method of the substation panel top small busbar connection device is characterized in that: include: Obtain the target splicing busbar, and select the access point and the exit point of the target splicing busbar; Connect the target tapped busbars to the busbar input and output tapping interfaces respectively, and perform wiring detection based on the voltage information on the busbar input and output tapping interfaces; When it is detected that the connection of the access point and the connection point of the target overlapping busbar is correct, the overlapping of the target overlapping busbar is established through the overlapping control switch.

7. The operating method of the substation top small busbar connection device according to claim 6 is characterized in that: The wiring detection is performed according to the voltage information on the input and output interface of the small busbar, including: Respectively obtain the voltage difference between each two phases on the input side of the DC voltage input and output interface and the voltage difference between each two phases on the output side; comparing the voltage difference with a standard voltage difference determined according to the corresponding terminal type; When the voltage difference is inconsistent with the standard voltage difference, it is determined that there is a wiring error; When the voltage difference is consistent with the standard voltage difference, the voltage difference between the same terminal types on the input side and the output side is obtained; If the voltage difference between the same terminal type on the input side and the output side is zero, the wiring is judged to be correct; If the voltage difference between the same terminal type on the input and output sides is not zero, it is judged that there is a wiring error.

8. The operating method of the substation top small busbar connection device according to claim 6 is characterized in that: The wiring detection is performed according to the voltage information on the small bus input and output connection interface, and further includes: Obtain the phase voltage and phase difference between the input side and the output side of the three-phase AC voltage input and output interface, and the phase voltage and phase difference between the input side and the output side of the single-phase AC voltage input and output interface; Compare the phase voltage and phase difference with the corresponding standard phase voltage value and standard phase difference value determined according to the target overlapping small bus type; When the phase voltage is inconsistent with the standard phase voltage value, and / or the phase difference is inconsistent with the standard phase difference value, it is determined that there is a wiring error; When the phase voltage is consistent with the standard phase voltage value, and the phase difference is consistent with the standard phase difference value, compare the phase difference value between the same terminal types on the input side and the output side; If the voltage difference between the same terminal type on the input side and the output side is zero, the wiring is judged to be correct; If the voltage difference between the same terminal type on the input side and the output side is not zero, it is judged that there is a wiring error.

9. The operating method of the substation top small busbar connection device according to claim 6, characterized in that: Also includes: When it is detected that there is a wiring error at the access point and the access point of the target spliced ​​busbar, the terminal with the wiring error and the corresponding abnormal voltage information are displayed through the status indication window.

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