Early warning and monitoring device for abnormal paralleling of secondary circuit of voltage transformer and electronic equipment

Abstract

The invention relates to the technical field of line detection, and provides an early warning and monitoring device for abnormal paralleling of a secondary circuit of a voltage transformer and electronic equipment. The voltage transformer secondary circuit abnormal parallel early warning and monitoring device controls the alarm module to generate alarm information through the control module at least according to the position of the first air switch, the position of the second air switch, the size of the three-phase voltage of the second end of the first air switch and the size of the three-phase voltage of the second end of the second air switch. Or no alarm information is generated, so that automatic alarm identification is realized, an existing pure manual operation judgment mode is replaced, the operation steps of bus power failure in a double-bus wiring mode are reduced, and the problem that in the prior art, the abnormity of the double-bus structure of the voltage transformer is judged by depending on manual operation measurement is solved; and the detection efficiency is low.

Description

Technical Field

[0001] The present application relates to the technical field of line detection, and in particular to an abnormal parallel warning monitoring device and electronic equipment for a secondary circuit of a voltage transformer. Background Art

[0002] In a substation with double busbar connection, if the abnormal parallel connection of the voltage transformer (PT) secondary circuit is not discovered in time, the running bus PT will be charged to the hot standby bus PT when the bus tie switch is disconnected. The consequence will be that the secondary circuit breaker of the voltage transformer on the PT terminal box (such as Figure 1 1ZKK, 2ZKK) overload trip, PT parallel screen heavy relay (such as Figure 1 1GWJ, 2GWJ) and parallel relay make contacts (such as Figure 1 BLJ shown), voltage switching operation relay box two-position relay normally closed contacts (such as Figure 1 The 1YQJ and 2YQJ shown in the figure may burn out due to the large current passing through them, that is, the corresponding plug-in on the abnormal parallel circuit of the PT secondary may be burned out. This situation may affect the voltage input of this interval at the least, or affect the voltage input of all intervals on the bus at the worst, which may lead to the risk of misoperation of protection and affect the safe operation of the power grid.

[0003] In the prior art, during the busbar power outage operation of a substation with a double busbar connection method, in order to prevent the abnormal parallelization of the PT secondary circuit and cause a reverse charging accident, before executing the operation step of disconnecting the busbar tie switch, the operator first disconnects the secondary air switch of the busbar PT to be shut down, and measures the voltage at both ends of the air switch to be normal: that is, the voltage at the load end (the lower end of the air switch) is zero, and the voltage at the PT end (the upper end of the air switch) is not zero. Then, the PT primary knife switch is opened, and finally the busbar tie switch is disconnected to prevent the formation of a PT reverse power supply circuit.

[0004] The disadvantages of the existing technical solution are: by adding a manual judgment step to the operation ticket: the on-site operator manually operates the secondary air switch of the PT, and measures the voltage values ​​at the upper and lower ends of the air switch to confirm whether there is an abnormal parallel situation in the secondary circuit. This process is completely dependent on manual labor. Once the personnel have insufficient skills, work fatigue, lack of concentration, etc., it will cause misoperation or misjudgment. At the same time, since there is no effective reminder for the abnormal parallel alarm signal of the PT secondary circuit, the personnel cannot stop the subsequent operation steps in time, so it is impossible to effectively prevent the reverse charging caused by the abnormal parallel of the PT secondary circuit, which will inevitably affect the safe and stable operation of the power grid.

[0005] That is, the prior art relies on manual operation and measurement to determine abnormalities in the double busbar structure of the voltage transformer, resulting in low detection efficiency. Summary of the invention

[0006] The main purpose of the present application is to provide a voltage transformer secondary circuit abnormal parallel warning monitoring device and electronic equipment, so as to at least solve the problem of low detection efficiency caused by the prior art relying on manual operation measurement to perform abnormal judgment on the double busbar structure of the voltage transformer.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present application, a voltage transformer secondary circuit abnormal parallel warning monitoring device is provided, comprising: two bus sections, namely a first bus section and a second bus section; two voltage transformers, namely a first voltage transformer and a second voltage transformer, wherein the first end of the first voltage transformer is electrically connected to the first bus section, and the first end of the second voltage transformer is electrically connected to the second bus section; two air switches, namely a first air switch and a second air switch, wherein the first end of the first air switch is electrically connected to the second end of the first voltage transformer, and the second end of the second air switch is electrically connected to the second end of the second voltage transformer; a control module, wherein the input end of the control module is electrically connected to the second end of the first air switch and the second end of the second air switch respectively; an alarm module, which is electrically connected to the output end of the control module;

[0008] Among them, the control module is used to control the alarm module to generate alarm information or not generate the alarm information based on at least the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch.

[0009] Optionally, the control module includes:

[0010] a digital-to-analog conversion module, electrically connected to the second end of the first air switch and the second end of the second air switch, respectively, the digital-to-analog conversion module being used to convert an analog signal into a digital signal, and being used to collect a three-phase voltage at the second end of the first air switch and a three-phase voltage at the second end of the second air switch;

[0011] A controller is electrically connected between the digital-to-analog conversion module and the alarm module, wherein the controller is used to control the alarm module to generate the alarm information or not generate the alarm information based on at least the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch.

[0012] Optionally, the alarm module includes a display device, a first alarm device and a second alarm device, and the display device, the first alarm device and the second alarm device are electrically connected to the output end of the control module respectively. The display device is used to display the alarm information. When the display device displays the alarm information, the first alarm device and / or the second alarm device issues an alarm.

[0013] Optionally, the voltage transformer secondary circuit abnormal parallel warning monitoring device also includes a parallel handle, and the parallel handle is electrically connected to the input end of the control module.

[0014] Optionally, the control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including:

[0015] The control module is used to control the alarm module to generate the alarm information or not generate the alarm information according to the position of the parallel handle, the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch.

[0016] Optionally, the control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including:

[0017] The control module is used to obtain the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch;

[0018] The control module is used to control the alarm module to generate alarm information or not generate the alarm information based on at least the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch.

[0019] Optionally, the control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including:

[0020] The control module is used to control the alarm module to generate the alarm information when a first condition is met, wherein the first condition indicates that the position of the first air switch is the disconnected position, and any voltage of the three-phase voltage at the second end of the first air switch is not 0;

[0021] The control module is used to control the alarm module to generate the alarm information when a second condition is met, wherein the second condition indicates that the position of the second air switch is the disconnected position, and any voltage of the three-phase voltage at the second end of the second air switch is not 0;

[0022] The control module is used to control the alarm module not to generate the alarm information when a third condition is met, and the third condition is not the first condition and not the second condition.

[0023] Optionally, the voltage transformer secondary circuit abnormal parallel early warning monitoring device further includes a parallel handle, the parallel handle is electrically connected to the input end of the control module, the control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including:

[0024] The control module is used to control the alarm module to generate the alarm information when a fourth condition is met, wherein the fourth condition indicates that the parallel handle is in the disconnected position, the position of the first air switch is in the disconnected position, and any voltage of the three-phase voltage at the second end of the first air switch is not 0;

[0025] The control module is used to control the alarm module to generate the alarm information when a fifth condition is met, wherein the fifth condition indicates that the parallel handle is in the disconnected position, the position of the second air switch is in the disconnected position, and any voltage of the three-phase voltage at the second end of the second air switch is not 0;

[0026] The control module is used to control the alarm module not to generate the alarm information when a sixth condition is met, and the sixth condition represents neither the fourth condition nor the fifth condition.

[0027] Optionally, the first alarm device and the second alarm device are alarm indicator lights or sirens.

[0028] According to another aspect of the present application, an electronic device is provided, the electronic device comprising: any one of the voltage transformer secondary circuit abnormal parallel warning monitoring devices.

[0029] By applying the technical solution of the present application, the control module is controlled to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch, thereby achieving automatic alarm identification. It not only replaces the existing purely manual operation judgment method, reduces the operation steps of bus power outage under the double bus wiring method, and improves work efficiency, but also can continuously monitor whether the PT secondary circuit has abnormal parallel connection in real time, and can send alarm signals to monitoring personnel in time to quickly locate and handle faults, which solves the problem of low detection efficiency in the prior art that relies on manual operation measurement to judge the abnormality of the double bus structure of the voltage transformer. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] Figure 1 A schematic diagram of a secondary parallel circuit of an existing solution is shown;

[0032] Figure 2 A schematic structural diagram of a voltage transformer secondary circuit abnormal parallel warning monitoring device provided according to an embodiment of the present application is shown;

[0033] Figure 3 A schematic diagram of the working principle of a voltage transformer secondary circuit abnormal parallel warning monitoring device provided according to an embodiment of the present application is shown.

[0034] The above drawings include the following reference numerals:

[0035] 100. First voltage transformer; 200. Second voltage transformer; 300. Control module; 400. Alarm module. DETAILED DESCRIPTION

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0038] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0039] As introduced in the background technology, during the busbar power outage operation of the substation with a double busbar connection method in the prior art, in order to prevent the abnormal parallel connection of the PT secondary circuit from causing a reverse charging accident, before executing the operation step of disconnecting the busbar tie switch, the operator first disconnects the secondary air switch of the busbar PT to be shut down, and measures the voltage at both ends of the air switch to be normal: that is, the voltage at the load end (lower end of the air switch) is zero, and the voltage at the PT end (upper end of the air switch) is not zero. Then, the PT primary knife switch is opened, and finally the busbar tie switch is disconnected to prevent the formation of a PT reverse power supply circuit. In order to solve the problem that the prior art relies on manual operation and measurement to perform abnormal judgment on the double busbar structure of the voltage transformer, resulting in low detection efficiency, an embodiment of the present application provides a voltage transformer secondary circuit abnormal parallel warning monitoring device and electronic equipment.

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0041] The PT (Potential Transformer) secondary circuit is not connected in parallel normally, which leads to reverse charging accidents. In the power system, PT is usually used to measure voltage. If the secondary circuit of PT is connected in parallel incorrectly, it may cause current to flow to PT, thus causing reverse charging, which may cause damage to the equipment or safety hazards. Therefore, measures need to be taken to prevent this from happening.

[0042] Double busbar connection: Double busbar connection is a common connection method used in power systems. It includes two independent busbars, usually called bus section I and bus section II. The two busbars can be operated in parallel or separately through a bus tie circuit breaker.

[0043] Abnormal paralleling of the secondary circuit of the voltage transformer (PT): For the double bus connection method, a bus voltage transformer is configured on each bus section. There are two main situations of paralleling the secondary circuit. The first is that when the two bus sections are in parallel operation, when the voltage transformer on this bus section needs to be shut down for maintenance, in order to enable the operating equipment on this bus section to obtain voltage from the voltage transformer running on another bus section, the two bus sections PT secondary are manually paralleled, which can be understood as a long-term manual parallel circuit; the second is the double bus inversion operation process, the corresponding interval automatically changes the opening and closing state through the auxiliary contacts of its own bus knife switch to make the PT secondary parallel, which can be understood as a short-term automatic parallel circuit.

[0044] like Figure 2 As shown, the present application provides a voltage transformer secondary circuit abnormal parallel warning monitoring device, comprising:

[0045] Two busbars, the first busbar L1 and the second busbar L2 (i.e. busbar I and busbar II respectively);

[0046] Two voltage transformers, namely a first voltage transformer 100 and a second voltage transformer 200, wherein a first end of the first voltage transformer is electrically connected to the first bus section, and a first end of the second voltage transformer is electrically connected to the second bus section;

[0047] Two air switches, namely a first air switch 1ZZK and a second air switch 2ZZK, wherein a first end of the first air switch is electrically connected to a second end of the first voltage transformer, and a second end of the second air switch is electrically connected to a second end of the second voltage transformer;

[0048] A control module 300, wherein the input end of the control module is electrically connected to the second end of the first air switch and the second end of the second air switch respectively;

[0049] The alarm module 400 is electrically connected to the output terminal of the control module;

[0050] Among them, the above-mentioned control module is used to control the above-mentioned alarm module to generate alarm information, or not generate the above-mentioned alarm information, at least according to the position of the above-mentioned first air switch, the position of the above-mentioned second air switch, the size of the three-phase voltage at the second end of the above-mentioned first air switch, and the size of the three-phase voltage at the second end of the above-mentioned second air switch.

[0051] In the above-mentioned voltage transformer secondary circuit abnormal parallel early warning monitoring device, the control module controls the above-mentioned alarm module to generate alarm information, or not generate the above-mentioned alarm information, at least according to the position of the above-mentioned first air switch, the position of the above-mentioned second air switch, the size of the three-phase voltage at the second end of the above-mentioned first air switch, and the size of the three-phase voltage at the second end of the above-mentioned second air switch, so as to achieve automatic alarm recognition. It not only replaces the existing pure manual operation judgment method, reduces the operation steps of bus power outage under the double bus wiring method, and improves work efficiency, but also can continuously monitor whether the PT secondary circuit has abnormal parallel in real time, and can send alarm signals to monitoring personnel in time to quickly locate and handle faults, which solves the problem of low detection efficiency caused by the existing technology relying on manual operation measurement to judge the abnormality of the double bus structure of the voltage transformer.

[0052] By analyzing the double busbar structure of the voltage transformer, not only can the abnormal parallel connection of the secondary circuit that may occur during the busbar power outage operation be discovered in time, but also the continuous monitoring of the PT secondary circuit during daily operation can be realized. This solves the previous method of relying on manual operation and measurement for judgment, thus greatly improving work efficiency and effectively preventing the occurrence of PT secondary reverse charging. The device only needs to add 5 sampling points to the original PT secondary circuit (i.e., the positions of the two air switches, the three-phase voltage at the second end of the two air switches, and the parallel wrench), and the alarm output switch quantity obtained after A / D conversion and input into the PLC for logical operation is converted into contacts on the alarm circuit that can be used in the signaling circuit of the public measurement and control device of the substation and the on-site PT terminal box with the help of the intermediate relay module. The technical implementation is simple.

[0053] In one embodiment of the present application, Figure 3 As shown, the above control module includes:

[0054] A digital-to-analog conversion module is electrically connected to the second end of the first air switch and the second end of the second air switch, respectively, and the digital-to-analog conversion module is used to convert the analog signal into a digital signal, and is used to collect the three-phase voltage of the second end of the first air switch and the three-phase voltage of the second end of the second air switch;

[0055] A controller is electrically connected between the digital-to-analog conversion module and the alarm module, wherein the controller is used to control the alarm module to generate the alarm information or not generate the alarm information based on at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch.

[0056] Specifically, the intermediate relay isolation module is used for conversion isolation, and the controller may be a PLC;

[0057] PLC ladder diagram programming realizes the control logic of PT secondary abnormal parallel:

[0058] (1) 1ZKK switch is in the off position;

[0059] (2) The parallel handle is in the disconnected position;

[0060] (3) The voltage of any phase among the three phases A, B, and C at the second end of 1ZKK is not zero;

[0061] When the above three conditions are met at the same time, the PLC output switch nodes (out1, out3) are closed, so that the subsequent display device displays the alarm information, and the first alarm device is controlled to alarm to indicate that the first bus section is abnormal;

[0062] The same goes for 2ZKK:

[0063] (1) 2ZKK switch is in the off position;

[0064] (2) The parallel handle is in the disconnected position;

[0065] (3) The voltage of any phase among the three phases A, B, and C at the second end of 2ZKK is not zero;

[0066] When the above three conditions are met at the same time, the PLC output switch nodes (out2, out4) are closed, so that the subsequent display device displays the alarm information, and the second alarm device is controlled to alarm to indicate that the second bus section is abnormal;

[0067] In one embodiment of the present application, Figure 3 As shown, the alarm module includes a display device, a first alarm device and a second alarm device. The display device, the first alarm device and the second alarm device are electrically connected to the output end of the control module respectively. The display device is used to display the alarm information. When the display device displays the alarm information, the first alarm device and / or the second alarm device sounds an alarm.

[0068] Specifically, through the dual alarm of the display device and the alarm device, the staff can be accurately prompted whether the first bus section or the second bus section is abnormal.

[0069] In one embodiment of the present application, Figure 3 As shown, the abnormal parallel warning monitoring device for the secondary circuit of the voltage transformer further includes a parallel handle, and the parallel handle is electrically connected to the input end of the control module.

[0070] The control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including:

[0071] The control module is used to control the alarm module to generate the alarm information or not generate the alarm information according to the position of the parallel handle, the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch.

[0072] Specifically, parallel handles are added to take manual adjustments into account.

[0073] In one embodiment of the present application, the control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including:

[0074] The control module is used to obtain the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch;

[0075] The control module is used to control the alarm module to generate alarm information or not generate the alarm information based on at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch.

[0076] Schematic diagram Figure 3 As shown, no further details will be given here.

[0077] In one embodiment of the present application, the control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including:

[0078] The control module is used to control the alarm module to generate the alarm information when the first condition is met, wherein the first condition indicates that the position of the first air switch is the disconnected position, and any voltage of the three-phase voltage at the second end of the first air switch is not 0;

[0079] The control module is used to control the alarm module to generate the alarm information when the second condition is met, wherein the second condition indicates that the position of the second air switch is the disconnected position, and any voltage of the three-phase voltage at the second end of the second air switch is not 0;

[0080] The control module is used to control the alarm module not to generate the alarm information when a third condition is met. The third condition is not the first condition and is not the second condition.

[0081] Taking 1ZZK as an example, PLC ladder diagram programming realizes the control logic of PT secondary abnormal parallel:

[0082] (1) 1ZKK switch is in the off position;

[0083] (2) The voltage of any phase among the three phases A, B, and C at the second end of 1ZKK is not zero;

[0084] When the above two conditions are met at the same time, the PLC output switch nodes (out1, out3) are closed, so that the subsequent display device displays the alarm information, and at the same time controls the first alarm device to alarm to indicate that the first bus section is abnormal.

[0085] The sampling sensor can be used to collect the position of the air switch, the position of the parallel handle, and the voltage at the second end of the two air switches.

[0086] The two air switches use PT secondary air switches with auxiliary contacts, so that they can be input into the PLC as switch quantities to reflect their open or closed states.

[0087] In one embodiment of the present application, the voltage transformer secondary circuit abnormal parallel early warning monitoring device further includes a parallel handle, the parallel handle is electrically connected to the input end of the control module, and the control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including:

[0088] The control module is used to control the alarm module to generate the alarm information when a fourth condition is met, wherein the fourth condition indicates that the parallel handle is in the disconnected position, the position of the first air switch is in the disconnected position, and any voltage of the three-phase voltage at the second end of the first air switch is not 0;

[0089] The control module is used to control the alarm module to generate the alarm information when the fifth condition is met, wherein the fifth condition indicates that the parallel handle is in the disconnected position, the position of the second air switch is in the disconnected position, and any voltage of the three-phase voltage at the second end of the second air switch is not 0;

[0090] The control module is used to control the alarm module not to generate the alarm information when a sixth condition is met. The sixth condition is not the fourth condition and is not the fifth condition.

[0091] Taking 1ZZK as an example, PLC ladder diagram programming realizes the control logic of PT secondary abnormal parallel:

[0092] (1) 1ZKK switch is in the off position;

[0093] (2) The parallel handle is in the disconnected position;

[0094] (3) The voltage of any phase among the three phases A, B, and C at the second end of 1ZKK is not zero;

[0095] When the above three conditions are met at the same time, the PLC output switch nodes (out1, out3) are closed, so that the subsequent display device displays the alarm information, and at the same time controls the first alarm device to alarm to indicate that the first section of the bus is abnormal.

[0096] The abnormal parallel switch output of the PT secondary is converted and isolated by the intermediate relay module, and then connected to the indicator light or siren control circuit on the on-site PT terminal box panel, so as to realize the on-site alarm of the signal, effectively reminding the on-site operator to immediately suspend the operation and troubleshoot the fault.

[0097] In one embodiment of the present application, the first alarm device and the second alarm device are alarm indicator lights or sirens.

[0098] According to another aspect of the present application, an electronic device is provided, the electronic device comprising: any one of the above-mentioned voltage transformer secondary circuit abnormal parallel early warning monitoring devices. By controlling the above-mentioned alarm module to generate alarm information or not generate the above-mentioned alarm information according to at least the position of the above-mentioned first air switch, the position of the above-mentioned second air switch, the magnitude of the three-phase voltage at the second end of the above-mentioned first air switch, and the magnitude of the three-phase voltage at the second end of the above-mentioned second air switch, the control module can be automatically alarmed and identified, which not only replaces the existing purely manual operation judgment method, reduces the operation steps of bus power outage under the double bus wiring method, and improves work efficiency, but also can continuously monitor whether the PT secondary circuit is abnormally parallel in real time, and can send an alarm signal to the monitoring personnel in time to quickly locate and handle the fault, solving the problem that the existing technology relies on manual operation measurement to judge the abnormality of the double bus structure of the voltage transformer, resulting in low detection efficiency.

[0099] It should be noted that the above electrical connection can be a direct electrical connection or an indirect electrical connection. Direct electrical connection means that two devices are directly connected, and indirect electrical connection means that other devices such as capacitors and resistors are also connected between the connected A and B.

[0100] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0101] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0102] 1) The abnormal parallel warning monitoring device for the secondary circuit of the voltage transformer of the present application controls the alarm module to generate alarm information or not generate the alarm information at least according to the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch through the control module, thereby achieving automatic alarm recognition. It not only replaces the existing purely manual operation judgment method, reduces the operation steps of bus power outage under the double bus wiring method, and improves work efficiency, but also can continuously monitor whether the PT secondary circuit has abnormal parallel in real time, and can send an alarm signal to the monitoring personnel in time to quickly locate and handle the fault, solving the problem of low detection efficiency caused by the existing technology of relying on manual operation measurement to judge the abnormality of the double bus structure of the voltage transformer.

[0103] 2) The electronic device of the present application controls the alarm module to generate alarm information or not generate the alarm information by controlling the module at least according to the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch, thereby achieving automatic alarm recognition. It not only replaces the existing purely manual operation judgment method, reduces the operation steps of bus power outage under the double bus wiring method, and improves work efficiency, but also can continuously monitor whether the PT secondary circuit has abnormal parallel connection in real time, and can send alarm signals to monitoring personnel in time to quickly locate and handle faults, solving the problem of low detection efficiency in the prior art that relies on manual operation measurement to judge the abnormality of the double bus structure of the voltage transformer.

[0104] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A voltage transformer secondary circuit abnormal parallel warning monitoring device, characterized in that: include: Two busbar sections, the first busbar section and the second busbar section; Two voltage transformers, namely a first voltage transformer and a second voltage transformer, wherein a first end of the first voltage transformer is electrically connected to the first bus section, and a first end of the second voltage transformer is electrically connected to the second bus section; Two air switches, namely a first air switch and a second air switch, wherein a first end of the first air switch is electrically connected to a second end of the first voltage transformer, and a second end of the second air switch is electrically connected to a second end of the second voltage transformer; A control module, wherein an input end of the control module is electrically connected to a second end of the first air switch and a second end of the second air switch respectively; An alarm module, electrically connected to the output end of the control module; Among them, the control module is used to control the alarm module to generate alarm information or not generate the alarm information based on at least the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch.

2. The voltage transformer secondary circuit abnormal parallel warning monitoring device according to claim 1 is characterized in that: The control module comprises: a digital-to-analog conversion module, electrically connected to the second end of the first air switch and the second end of the second air switch, respectively, the digital-to-analog conversion module being used to convert an analog signal into a digital signal, and being used to collect a three-phase voltage at the second end of the first air switch and a three-phase voltage at the second end of the second air switch; A controller is electrically connected between the digital-to-analog conversion module and the alarm module, wherein the controller is used to control the alarm module to generate the alarm information or not generate the alarm information based on at least the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch.

3. The voltage transformer secondary circuit abnormal parallel warning monitoring device according to claim 1 is characterized in that: The alarm module includes a display device, a first alarm device and a second alarm device, and the display device, the first alarm device and the second alarm device are electrically connected to the output end of the control module respectively. The display device is used to display the alarm information. When the display device displays the alarm information, the first alarm device and / or the second alarm device issues an alarm.

4. The voltage transformer secondary circuit abnormal parallel warning monitoring device according to claim 1, characterized in that: The voltage transformer secondary circuit abnormal parallel early warning monitoring device also includes a parallel handle, and the parallel handle is electrically connected to the input end of the control module.

5. The voltage transformer secondary circuit abnormal parallel warning monitoring device according to claim 4 is characterized in that: The control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including: The control module is used to control the alarm module to generate the alarm information or not generate the alarm information according to the position of the parallel handle, the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch.

6. The voltage transformer secondary circuit abnormal parallel warning monitoring device according to claim 1, characterized in that: The control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including: The control module is used to obtain the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch; The control module is used to control the alarm module to generate alarm information or not generate the alarm information based on at least the position of the first air switch, the position of the second air switch, the size of the three-phase voltage at the second end of the first air switch, and the size of the three-phase voltage at the second end of the second air switch.

7. The voltage transformer secondary circuit abnormal parallel warning monitoring device according to claim 1, characterized in that: The control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including: The control module is used to control the alarm module to generate the alarm information when a first condition is met, wherein the first condition indicates that the position of the first air switch is the disconnected position, and any voltage of the three-phase voltage at the second end of the first air switch is not 0; The control module is used to control the alarm module to generate the alarm information when a second condition is met, wherein the second condition indicates that the position of the second air switch is the disconnected position, and any voltage of the three-phase voltage at the second end of the second air switch is not 0; The control module is used to control the alarm module not to generate the alarm information when a third condition is met, and the third condition is not the first condition and not the second condition.

8. The voltage transformer secondary circuit abnormal parallel warning monitoring device according to claim 1, characterized in that: The abnormal parallel warning monitoring device for the secondary circuit of the voltage transformer further includes a parallel handle, the parallel handle is electrically connected to the input end of the control module, and the control module is used to control the alarm module to generate alarm information or not generate the alarm information according to at least the position of the first air switch, the position of the second air switch, the magnitude of the three-phase voltage at the second end of the first air switch, and the magnitude of the three-phase voltage at the second end of the second air switch, including: The control module is used to control the alarm module to generate the alarm information when a fourth condition is met, wherein the fourth condition indicates that the parallel handle is in the disconnected position, the position of the first air switch is in the disconnected position, and any voltage of the three-phase voltage at the second end of the first air switch is not 0; The control module is used to control the alarm module to generate the alarm information when a fifth condition is met, wherein the fifth condition indicates that the parallel handle is in the disconnected position, the position of the second air switch is in the disconnected position, and any voltage of the three-phase voltage at the second end of the second air switch is not 0; The control module is used to control the alarm module not to generate the alarm information when a sixth condition is met, and the sixth condition is not the fourth condition and is not the fifth condition.

9. The voltage transformer secondary circuit abnormal parallel warning monitoring device according to claim 3, characterized in that: The first alarm device and the second alarm device are alarm indicator lights or sirens.

10. An electronic device, characterized in that: include: The abnormal parallel warning monitoring device for the secondary circuit of a voltage transformer as described in any one of claims 1 to 9.

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