Early warning and monitoring device and method for heteropolar voltage of transformer substation protection outlet pressing plate

Abstract

The invention discloses an early warning and monitoring device and method for heteropolar voltage of protection outlet pressing plates of a transformer substation, and relates to the technical field of transformer substations or other related fields, and the device comprises a digital collection unit which is used for collecting voltage to ground at the upper end and the lower end of each protection outlet pressing plate in a protection device of the transformer substation, voltages to ground at the upper end and the lower end are voltage analog signals; the A / D conversion unit is used for converting the voltage to ground at the upper end and the lower end into voltage digital signals; the programmable controller analysis processing unit is used for executing a heteropolar voltage alarm judgment strategy, and the heteropolar voltage alarm judgment strategy comprises the step of outputting an alarm signal under the condition that the voltage to ground at the upper end and the lower end is heteropolar voltage or the voltage to ground at the upper end is zero; and the display alarm unit outputs an alarm prompt based on the alarm signal. According to the invention, the technical problem that the working efficiency is low when heteropolarity voltage monitoring is carried out on the transformer substation protection outlet pressure plate in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of transformer substation or other related fields, and in particular to an early warning monitoring device and method for heteropolar voltage of transformer substation protection outlet pressure plate. Background Art

[0002] The protective outlet pressure plate of the power system is an important physical device for realizing the protection function of the substation, and plays a key role in the safe and stable operation of the substation. In the power system, the primary circuit usually refers to the high-voltage system, which is responsible for the transmission and distribution of electricity, and the secondary circuit usually refers to the low-voltage system, which is mainly used for the control, protection, measurement and signal transmission of the primary circuit. The protective outlet pressure plate is part of the secondary circuit. By connecting to the tripping coil or other related relays of the circuit breaker, it cuts off or closes the tripping circuit in the event of a fault or abnormality, thereby controlling the tripping action of the circuit breaker.

[0003] In the related art, when the secondary circuit of the power system has a situation where the protection action contact sticks or the protection action self-holding relay does not return, if the protection outlet pressure plate is not properly monitored, it will cause the circuit breaker to trip incorrectly, which will affect the safety and stability of the power grid. Therefore, before the protection outlet pressure plate is put into use, it is necessary to measure whether there is a voltage of different polarity between the upper and lower ends of the protection outlet pressure plate and the ground. After determining that there is no voltage of different polarity between the upper and lower ends of the protection outlet pressure plate and the ground, the protection outlet pressure plate can be put into use. The existing strategy for monitoring the voltage between the upper and lower ends of the protection outlet pressure plate and the ground is usually for the operating object to use a multimeter to measure and distinguish the voltage, and the whole process is completely dependent on the execution process of the operating object. This monitoring strategy has significant limitations. If the operating object is inexperienced or in poor condition, the voltage measurement result will be abnormal; if the multimeter is used improperly, the resistance range or current range of the multimeter is used incorrectly, or the positive and negative poles of the multimeter are connected to the ports at the upper and lower ends of the protection outlet pressure plate, the voltage measurement result will be abnormal, which will cause the substation protection device to malfunction and cause the tripping accident.

[0004] To address the above-mentioned problems, no effective solution has been proposed yet. Summary of the invention

[0005] The embodiment of the present invention provides an early warning monitoring device and method for the polarity voltage of the transformer substation protection outlet pressure plate, so as to at least solve the technical problem of low working efficiency when monitoring the polarity voltage of the transformer substation protection outlet pressure plate in the related art.

[0006] According to one aspect of an embodiment of the present invention, there is provided an early warning monitoring device for the voltage difference between the upper and lower ends of each protection outlet pressure plate in the substation protection device, comprising: a digital acquisition unit for acquiring the voltages between the upper and lower ends of each protection outlet pressure plate in the substation protection device to the ground, wherein the voltages between the upper and lower ends to the ground are voltage analog signals; an A / D conversion unit for converting the voltages between the upper and lower ends to the ground into voltage digital signals; a programmable controller analysis and processing unit for executing a strategy for distinguishing voltage difference between the two polarities, wherein the strategy for distinguishing voltage difference between the two polarities comprises: outputting an alarm signal when the voltages between the upper and lower ends to the ground are voltages of different polarities, or when the voltage between the upper end and the ground is zero; and a display alarm unit for outputting an alarm prompt based on the alarm signal.

[0007] Optionally, the digital acquisition unit includes: at least two voltage measuring electrodes, and the voltage measuring electrodes are used to connect the upper electrode or the lower electrode of the protection outlet pressure plate.

[0008] Optionally, the display alarm unit includes: an alarm diode, which lights up the alarm diode when an alarm signal is received; and a buzzer, which starts up the buzzer when an alarm signal is received.

[0009] Optionally, the display alarm unit also includes: a protection screen display alarm module, which is used to display the names and numbers of different protection outlet pressure plates, the values ​​of the voltages between the upper and lower ends of the protection outlet pressure plates to the ground, and alarm signals.

[0010] Optionally, the protection screen display alarm module includes: an alarm threshold setting submodule, which is used to set the upper end-to-ground voltage threshold and the lower end-to-ground voltage threshold of the protection outlet pressure plate.

[0011] Optionally, the display alarm unit also includes: an intermediate relay isolation module, which is used to isolate the programmable controller analysis and processing unit from the measurement and control device connection module, receive the alarm signal of the programmable controller analysis and processing unit, and transmit the alarm signal to the measurement and control device connection module; a measurement and control device connection module, which is used to connect the substation public measurement and control device and transmit the alarm signal to the substation public measurement and control device; a background monitoring transmission module, which is used to transmit the alarm signal from the substation public measurement and control device to the substation background monitoring machine, wherein the substation background monitoring machine is used to perform process monitoring on the substation.

[0012] According to another aspect of an embodiment of the present invention, a method for early warning monitoring of the heteropolarity voltage of a transformer substation protection outlet pressure plate is provided, which is applied to a device for early warning monitoring of the heteropolarity voltage of a transformer substation protection outlet pressure plate. The method for early warning monitoring of the heteropolarity voltage of a transformer substation protection outlet pressure plate includes: collecting the voltages to the ground of the upper and lower ends of each protection outlet pressure plate in the transformer substation protection device, wherein the voltages to the ground of the upper and lower ends are voltage analog signals; converting the voltages to the ground of the upper and lower ends into voltage digital signals; executing a strategy for distinguishing the voltages to the ground of heteropolarity, and outputting an alarm signal when the voltages to the ground of the upper and lower ends are heteropolarity voltages or the voltage of the upper end to the ground is zero; and outputting an alarm prompt based on the alarm signal.

[0013] Optionally, the discrimination criteria of the different-polarity voltage alarm discrimination strategy include: a first discrimination criterion, when the upper end voltage to ground is a negative polarity voltage and the lower end voltage to ground is zero, the voltage is judged to be normal; a second discrimination criterion, when the upper end voltage to ground is a negative polarity voltage and the lower end voltage to ground is a positive polarity voltage, the upper and lower end voltages to ground are judged to be different-polarity voltages, and an alarm signal is output; a third discrimination criterion, when the upper end voltage to ground is zero and the lower end voltage to ground is zero, the voltage is judged to be abnormal, and an alarm signal is output; a fourth discrimination criterion, when the upper end voltage to ground is zero and the lower end voltage to ground is a positive polarity voltage, the voltage is judged to be abnormal, and an alarm signal is output.

[0014] Optionally, the digital acquisition unit includes at least two voltage measuring electrodes, and the voltage measuring electrodes are connected to the upper electrode or the lower electrode of the protection outlet pressure plate.

[0015] Optionally, upon receiving an alarm signal, the display alarm unit lights up an alarm diode and starts a buzzer.

[0016] Optionally, the names and numbers of different protection outlet pressure plates, the values ​​of the voltages between the upper and lower ends of the protection outlet pressure plates and the ground, and the alarm signals are displayed on the protection screen display alarm module.

[0017] Optionally, an upper end-to-ground voltage threshold and a lower end-to-ground voltage threshold of the protection outlet pressure plate are set on the alarm threshold setting submodule in the protection screen display alarm module.

[0018] Optionally, an intermediate relay isolation module is used to isolate the programmable controller analysis and processing unit from the measurement and control device connection module, receive the alarm signal of the programmable controller analysis and processing unit, and transmit the alarm signal to the measurement and control device connection module; the measurement and control device connection module is used to connect the substation public measurement and control device, and transmit the alarm signal to the substation public measurement and control device; the background monitoring transmission module is used to transmit the alarm signal from the substation public measurement and control device to the substation background monitoring machine, wherein the substation background monitoring machine is used to perform process monitoring on the substation.

[0019] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute any one of the above-mentioned early warning monitoring methods for the opposite polarity voltage of the substation protection outlet pressure plate.

[0020] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising one or more processors and a memory, the memory being used to store one or more programs, wherein when the one or more programs are executed by one or more processors, the one or more processors implement any one of the above-mentioned early warning monitoring methods for the heteropolar voltage of the protection outlet pressure plate of a substation.

[0021] According to another aspect of an embodiment of the present invention, a computer program product is also provided, including a computer program, which, when executed by a processor, implements the steps of any of the above-mentioned early warning monitoring methods for the opposite polarity voltage of the transformer substation protection outlet pressure plate.

[0022] In the present disclosure, the early warning monitoring device for the heteropolar voltage of the transformer substation protection outlet pressure plate includes a digital acquisition unit, an A / D conversion unit, a programmable controller analysis and processing unit, and a display alarm unit. The digital acquisition unit only needs to add voltage data acquisition points at the upper and lower ends of each protection outlet pressure plate of the transformer substation protection device to collect the upper and lower ground voltages of each protection outlet pressure plate. The A / D conversion unit converts the upper and lower ground voltages into voltage digital signals. The programmable controller analysis and processing unit executes the heteropolar voltage alarm discrimination strategy. When the upper and lower ground voltages are heteropolar voltages or the upper end ground voltage is zero, an alarm signal is output. Finally, the display alarm unit outputs an alarm prompt based on the alarm signal. The present invention discloses a warning monitoring device for the heteropolar voltage of the transformer substation protection outlet pressure plate, which can timely discover the situation that the voltages at the upper and lower ends of the protection outlet pressure plate to the ground are heteropolar voltages or the voltage at the upper end to the ground is zero, effectively reducing the possibility of tripping accidents caused by operating errors, significantly improving work efficiency, and further solving the technical problem of low work efficiency when performing heteropolar voltage monitoring on the transformer substation protection outlet pressure plate in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 It is a schematic diagram of an optional early warning monitoring device for the different polarity voltage of the transformer substation protection outlet pressure plate according to an embodiment of the present invention;

[0025] Figure 2 It is a structural block diagram of an optional early warning monitoring device for the different polarity voltage of the transformer substation protection outlet pressure plate according to an embodiment of the present invention;

[0026] Figure 3 It is a flow chart of an optional early warning monitoring method for the different polarity voltage of the transformer substation protection outlet pressure plate according to an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of a strategy for distinguishing different polarity voltage alarms in an optional early warning monitoring method for different polarity voltages of a transformer substation protection outlet pressure plate according to an embodiment of the present invention;

[0028] Figure 5 It is a logic diagram of an optional early warning monitoring method for the different polarity voltage of the transformer substation protection outlet pressure plate according to an embodiment of the present invention;

[0029] Figure 6 The present invention is a hardware structure block diagram of an electronic device (or mobile device) for an early warning monitoring method of a transformer substation protection outlet pressure plate heteropolar voltage according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0032] To facilitate those skilled in the art to understand the present invention, some terms or nouns involved in the embodiments of the present invention are explained below:

[0033] Protection outlet pressure plate: It is a connection device used to control and isolate the protection device and the circuit breaker tripping circuit in the power system. According to the different locations of the secondary circuit connected to the power system, it can be divided into protection function pressure plate and protection outlet pressure plate.

[0034] Heterogeneous polarity voltage: refers to voltage signals with different positive and negative polarities in the same circuit.

[0035] It should be noted that the early warning monitoring device and method for the heteropolar voltage of the substation protection outlet pressure plate in the present disclosure can be used in the substation technology field when the heteropolar voltage of the substation protection outlet pressure plate is monitored, and can also be used in any field except the substation technology field when the heteropolar voltage of the substation protection outlet pressure plate is monitored. The application field of the early warning monitoring device and method for the heteropolar voltage of the substation protection outlet pressure plate in the present disclosure is not limited.

[0036] The following embodiments of the present invention can be applied to various systems / applications / equipment for early warning monitoring of polarity voltage of transformer substation protection outlet pressure plates. The present invention uses an early warning monitoring device for polarity voltage of transformer substation protection outlet pressure plates, which includes a digital acquisition unit, an A / D conversion unit, a programmable controller analysis and processing unit, and a display alarm unit. By timely discovering that the voltages of the upper and lower ends of the protection outlet pressure plate to the ground are polarity voltages or the voltage of the upper end to the ground is zero, the possibility of tripping accidents caused by operating errors is effectively reduced, and work efficiency is significantly improved, thereby solving the technical problem of low work efficiency in related technologies when monitoring polarity voltage of transformer substation protection outlet pressure plates.

[0037] The present invention is described in detail below in conjunction with various embodiments.

[0038] Embodiment 1

[0039] According to an embodiment of the present invention, an embodiment of a device for early warning and monitoring of voltages of different polarities on a pressure plate at a protection outlet of a transformer substation is provided.

[0040] Figure 1 is a schematic diagram of an optional early warning monitoring device for the voltage of the opposite polarity of the transformer substation protection outlet pressure plate according to an embodiment of the present invention, such as Figure 1 As shown, the early warning monitoring device for the voltage difference between polarities of the protection outlet pressure plate of the transformer substation includes: a digital acquisition unit 11, an A / D conversion unit 12, a programmable controller analysis and processing unit 13, and a display alarm unit 14.

[0041] Among them, the digital acquisition unit 11 is used to collect the voltage between the upper and lower ends of each protection outlet pressure plate in the substation protection device to the ground, wherein the voltage between the upper and lower ends to the ground is a voltage analog signal; the A / D conversion unit 12 is used to convert the voltage between the upper and lower ends to the ground into a voltage digital signal; the programmable controller analysis and processing unit 13 is used to execute the different polarity voltage alarm discrimination strategy, wherein the different polarity voltage alarm discrimination strategy includes: when the voltage between the upper and lower ends to the ground is a different polarity voltage, or when the voltage between the upper end and the ground is zero, an alarm signal is output; the display alarm unit 14 outputs an alarm prompt based on the alarm signal.

[0042] An early warning monitoring device for the heteropolar voltage of a transformer substation protection outlet pressure plate provided in an embodiment of the present invention includes a digital acquisition unit, an A / D conversion unit, a programmable controller analysis and processing unit, and a display and alarm unit. The digital acquisition unit is connected to the A / D conversion unit, the A / D conversion unit is connected to the programmable controller analysis and processing unit, and the programmable controller analysis and processing unit is connected to the display and alarm unit via serial port communication.

[0043] After the device is started, the digital acquisition unit collects the voltages of the upper and lower ends of each protection outlet pressure plate in the substation protection device in real time, converts the voltages of the upper and lower ends to the ground from voltage analog signals to voltage digital signals through the A / D conversion unit, and sends the signals to the programmable controller analysis and processing unit. The programmable controller analysis and processing unit contains a set of different polarity voltage alarm discrimination algorithms, which performs logical judgment on the upper and lower ends of the voltage to the ground converted into voltage digital signals by executing the different polarity voltage alarm discrimination strategy, and derives whether the voltages of the upper and lower ends to the ground are different polarity voltages or whether the upper end voltage to the ground is zero. In the case that the voltages of the upper and lower ends to the ground are different polarity voltages, or the voltage of the upper end to the ground is zero, an alarm signal is output to the display alarm unit. The display alarm unit outputs an alarm prompt based on the alarm signal, providing an accurate and intuitive judgment basis for the input of the protection outlet pressure plate. The embodiments of the present invention can effectively avoid malfunction of protection devices caused by voltages of different polarities and zero voltage between the upper end and the ground through real-time monitoring and early warning, significantly improve the safety and reliability of power system operation, and are suitable for protection systems of various substations, power plants and power transmission networks.

[0044] It should be noted that the voltage of different polarity refers to the situation where the two voltages appearing in the circuit have different polarities, that is, there are voltage signals with different positive and negative polarities in the same circuit. When executing the different polarity voltage alarm discrimination strategy, it is deduced whether it is necessary to issue an alarm signal to the display alarm unit according to the different polarities of the upper end voltage to ground and the lower end voltage to ground. Specifically, when the upper end voltage to ground is a negative polarity voltage and the lower end voltage to ground is zero, the voltage is determined to be normal, and there is no need to send an alarm signal at this time; when the upper end voltage to ground is a negative polarity voltage and the lower end voltage to ground is a positive polarity voltage, the upper and lower end voltages to ground are determined to be different polarity voltages, and an alarm signal is output; when the upper end voltage to ground is zero and the lower end voltage to ground is zero, the voltage is determined to be abnormal and an alarm signal is output; when the upper end voltage to ground is zero and the lower end voltage to ground is positive polarity voltage, the voltage is determined to be abnormal and an alarm signal is output.

[0045] Optionally, the digital acquisition unit 11 includes: at least two voltage measuring electrodes, and the voltage measuring electrodes are used to connect the upper electrode or the lower electrode of the protection outlet pressure plate.

[0046] In an embodiment of the present invention, the substation protection device includes one or more protection outlet pressure plates, and the digital acquisition unit includes one or more sets of voltage measurement electrodes, each set of voltage measurement electrodes includes two voltage measurement electrodes. The two voltage measurement electrodes in a set of voltage measurement electrodes are respectively connected to the upper electrode and the lower electrode of the protection outlet pressure plate, and are used to collect the upper end voltage to ground and the lower end voltage to ground of the protection outlet pressure plate.

[0047] Optionally, the display alarm unit 14 includes: an alarm diode, which lights up the alarm diode when receiving an alarm signal; and a buzzer, which starts the buzzer when receiving an alarm signal.

[0048] In an embodiment of the present invention, the display alarm unit includes a protection screen display alarm module, an alarm diode, and a buzzer. When the programmable controller analysis and processing unit detects that the voltages of the upper and lower ends of the protection outlet pressure plate to the ground are opposite polarity voltages or the voltage of the upper end to the ground is zero, the programmable controller analysis and processing unit sends an alarm signal to the display alarm unit. After receiving the alarm signal, the display alarm unit lights up the alarm diode and starts the buzzer, effectively reminding the operating object to stop the operation immediately through sound and light.

[0049] Optionally, the display alarm unit 14 further includes: a protection screen display alarm module, which is used to display the names and numbers of different protection outlet pressure plates, the values ​​of the voltages between the upper and lower ends of the protection outlet pressure plates and the ground, and alarm signals.

[0050] In an embodiment of the present invention, the display alarm unit includes a protection screen display alarm module, an alarm diode and a buzzer. The protection screen in the protection screen display alarm module can use an LCD display screen. When the display alarm unit receives an alarm signal, the name and number of the protection outlet pressure plate corresponding to the occurrence of opposite polarity voltage or zero upper end voltage to ground will be displayed on the LCD display screen to help the operator quickly locate and check the fault. At the same time, the protection screen in the protection screen display alarm module will display the value of the upper and lower ends of each outlet pressure plate in the substation protection device to the ground, as well as the alarm signal sent by the programmable controller analysis and processing unit. The name and number of the protection outlet pressure plate, the value of the upper and lower ends of the protection outlet pressure plate to the ground, and the alarm signal are respectively displayed in different screens of the protection screen, and the operator can slide in the protection screen display alarm module to switch different display screens.

[0051] Optionally, the protection screen display alarm module includes: an alarm threshold setting submodule, which is used to set the upper end-to-ground voltage threshold and the lower end-to-ground voltage threshold of the protection outlet pressure plate.

[0052] In an embodiment of the present invention, the protection screen display alarm module also includes an alarm threshold setting submodule, in which the upper end voltage threshold to ground and the lower end voltage threshold to ground of each protection outlet pressure plate can be set. For different protection outlet pressure plates, the upper end voltage threshold to ground and the lower end voltage threshold to ground may be different.

[0053] Optionally, the display alarm unit 14 also includes: an intermediate relay isolation module, which is used to isolate the programmable controller analysis and processing unit from the measurement and control device connection module, receive the alarm signal of the programmable controller analysis and processing unit, and transmit the alarm signal to the measurement and control device connection module; a measurement and control device connection module, which is used to connect the substation public measurement and control device and transmit the alarm signal to the substation public measurement and control device; a background monitoring transmission module, which is used to transmit the alarm signal from the substation public measurement and control device to the substation background monitoring machine, wherein the substation background monitoring machine is used to perform process monitoring on the substation.

[0054] In the embodiment of the present invention, the display alarm unit also includes an intermediate relay isolation module, a measurement and control device connection module and a background monitoring transmission module. The programmable controller analysis and processing unit communicates with the substation background monitoring machine through these three modules.

[0055] An intermediate relay is an electronic component used for controlling a circuit and has an isolation function. The embodiment of the present invention isolates the programmable controller analysis and processing unit from the measurement and control device connection module through an intermediate relay isolation module to protect the safe and stable operation of the circuit. After receiving the alarm signal from the programmable controller analysis and processing unit, the intermediate relay isolation module transmits the alarm signal to the measurement and control device connection module. The measurement and control device connection module is used to connect the substation public measurement and control device to transmit the alarm signal to the substation public measurement and control device. The substation public measurement and control device is a component of the substation, and the measurement and control of the substation public signal can be realized in the substation public measurement and control device. After receiving the alarm signal, the substation public measurement and control device transmits the alarm signal to the substation background monitoring machine through the background monitoring transmission module, wherein the substation background monitoring machine is a component of the substation, and the process monitoring of the substation can be realized in the substation background monitoring machine. The embodiment of the present invention utilizes the existing background monitoring function of the substation, and transmits the alarm signal to the substation background monitoring machine through the intermediate relay isolation module, the measurement and control device connection module and the background monitoring transmission module, so as to realize the alarm monitoring reminder of the protection outlet pressure plate in the substation background.

[0056] Figure 2 1 is a structural block diagram of an optional early warning monitoring device for the voltage of the polarity difference of the transformer substation protection outlet pressure plate according to an embodiment of the present invention. Figure 2 It can be seen that the digital acquisition unit collects the upper end voltage to ground and the lower end voltage to ground of the protection outlet pressure plate in the substation protection device, wherein the protection outlet pressure plate includes protection outlet pressure plate 1 and protection outlet pressure plate 2. The upper and lower end voltages to ground are converted from voltage analog signals to voltage digital signals by the A / D conversion unit and transmitted to the programmable controller analysis and processing unit. In the programmable controller analysis and processing unit, In1, In2, In3 and In4 represent the input terminals for receiving the upper and lower end voltage signals to ground. The programmable controller analysis and processing unit executes the different polarity voltage alarm discrimination strategy to determine whether the upper and lower end voltages to ground are different polarity voltages or whether the upper end voltage to ground is zero, and outputs an alarm signal when the upper and lower end voltages to ground are different polarity voltages or the upper end voltage to ground is zero. Out1, out2, out3 and out4 represent the output terminals of the alarm signal. The display alarm unit receives the alarm signal, displays the name and number of different protection outlet pressure plates, the value of the voltage between the upper and lower ends of the protection outlet pressure plate and the ground, and the alarm signal in the protection screen display alarm module, and transmits the alarm signal to the substation background monitoring machine through the intermediate relay isolation module, the measurement and control device connection module and the background monitoring transmission module.

[0057] The above-mentioned early warning monitoring device for the heteropolar voltage of the transformer substation protection outlet pressure plate includes a digital acquisition unit 11, an A / D conversion unit 12, a programmable controller analysis and processing unit 13, and a display alarm unit 14. The digital acquisition unit 11 only needs to add voltage data collection points at the upper and lower ends of each protection outlet pressure plate of the transformer substation protection device to collect the upper and lower ground voltages of each protection outlet pressure plate. The A / D conversion unit 12 converts the upper and lower ground voltages into voltage digital signals. The programmable controller analysis and processing unit 13 executes a heteropolar voltage alarm discrimination strategy. When the upper and lower ground voltages are heteropolar voltages or the upper end ground voltage is zero, an alarm signal is output. Finally, the display alarm unit 14 outputs an alarm prompt based on the alarm signal. The embodiment of the present invention uses an early warning monitoring device for the polarity voltage of the transformer substation protection outlet pressure plate, and timely discovers that the voltages at the upper and lower ends of the protection outlet pressure plate to the ground are polarity voltages or the voltage at the upper end to the ground is zero, thereby effectively reducing the possibility of tripping accidents caused by operational errors and significantly improving work efficiency. It further solves the technical problem of low work efficiency when performing polarity voltage monitoring on the transformer substation protection outlet pressure plate in the related technology, and ensures the safe and stable operation of the power system.

[0058] The above-mentioned early warning monitoring device for the polarity voltage of the transformer substation protection outlet pressure plate may also include a processor and a memory. The above-mentioned digital acquisition unit 11, A / D conversion unit 12, programmable controller analysis and processing unit 13, display alarm unit 14, etc. are all stored in the memory as program units, and the processor executes the above-mentioned program units stored in the memory to realize the corresponding functions.

[0059] The processor includes a kernel, which retrieves the corresponding program unit from the memory. One or more kernels can be set, and the voltage of the transformer substation protection outlet pressure plate with different polarity can be monitored by adjusting the kernel parameters.

[0060] The above-mentioned memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as read-only memory (ROM) or flash memory (fl ash RAM), and the memory includes at least one storage chip.

[0061] The following is a detailed description in conjunction with another embodiment.

[0062] Embodiment 2

[0063] The embodiment of the early warning monitoring method of the different polarity voltage of the transformer substation protection outlet pressure plate provided in this embodiment is applied to the early warning monitoring device of the different polarity voltage of the transformer substation protection outlet pressure plate in embodiment 1. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0064] Figure 3 1 is a flow chart of an optional early warning monitoring method for the voltage of the opposite polarity of the transformer substation protection outlet pressure plate according to an embodiment of the present invention, such as Figure 3 As shown, the method comprises the following steps:

[0065] Step S301, collecting the voltages of the upper and lower ends of each protection outlet pressure plate in the substation protection device to the ground, wherein the voltages of the upper and lower ends to the ground are voltage analog signals.

[0066] Step S302, converting the voltages of the upper and lower ends to ground into voltage digital signals.

[0067] Step S303, executing the different polarity voltage alarm discrimination strategy, outputting an alarm signal when the voltages of the upper and lower ends to the ground are different polarity voltages or the voltage of the upper end to the ground is zero.

[0068] Step S304: output an alarm prompt based on the alarm signal.

[0069] In an embodiment of the present invention, an early warning monitoring device for the polarity voltage of the transformer substation protection outlet pressure plate is used to collect the voltage of the upper and lower ends of the protection outlet pressure plate to the ground in real time, convert the voltage analog signal into a voltage digital signal, and perform a polarity voltage alarm discrimination strategy based on the input voltage digital signal to deduce whether the voltage of the upper and lower ends to the ground is a polarity voltage or whether the voltage of the upper end to the ground is zero. When the voltage of the upper and lower ends to the ground is a polarity voltage or the voltage of the upper end to the ground is zero, an alarm signal is output to the display alarm unit, and then an intuitive and clear alarm prompt is performed through the display alarm unit. The embodiment of the present invention can not only monitor the polarity voltage of the transformer substation protection outlet pressure plate in real time, but also ensure that the operating object of the power facility can respond to the alarm prompt quickly and take measures in time to prevent the occurrence of power system failures by implementing an alarm mechanism, and is suitable for daily maintenance and emergency fault handling of the power system.

[0070] Optionally, the discrimination criteria of the different-polarity voltage alarm discrimination strategy include: a first discrimination criterion, when the upper end voltage to ground is a negative polarity voltage and the lower end voltage to ground is zero, the voltage is judged to be normal; a second discrimination criterion, when the upper end voltage to ground is a negative polarity voltage and the lower end voltage to ground is a positive polarity voltage, the upper and lower end voltages to ground are judged to be different-polarity voltages, and an alarm signal is output; a third discrimination criterion, when the upper end voltage to ground is zero and the lower end voltage to ground is zero, the voltage is judged to be abnormal, and an alarm signal is output; a fourth discrimination criterion, when the upper end voltage to ground is zero and the lower end voltage to ground is a positive polarity voltage, the voltage is judged to be abnormal, and an alarm signal is output.

[0071] Heterogeneous polarity voltage refers to the situation where two voltages with different polarities appear in a circuit, that is, there are voltage signals with different positive and negative polarities in the same circuit. Figure 4 It is a schematic diagram of an alternative strategy for distinguishing polarity voltage alarms in a method for early warning monitoring of polarity voltages at a transformer substation protection outlet pressure plate according to an embodiment of the present invention. Taking a 220V DC system in a transformer substation as an example, when the collected voltage from the upper end to the ground is -110V, that is, the voltage from the upper end to the ground is a negative voltage, and the collected voltage from the lower end to the ground is zero, it is determined that the voltage is normal and the protection outlet pressure plate can be put into use; when the collected voltage from the upper end to the ground is -110V, that is, the voltage from the upper end to the ground is a negative voltage, and the collected voltage from the lower end to the ground is 110V, that is, the voltage from the lower end to the ground is a positive voltage. It is determined that the voltages between the upper and lower ends to the ground are voltages of different polarity, the protection outlet pressure plate cannot be put into use, and the programmable controller analysis and processing unit outputs an alarm signal; when the collected voltage between the upper end and the ground is zero, and the collected voltage between the lower end and the ground is also zero, the protection tripping circuit is not conductive, the voltage is abnormal, and the programmable controller analysis and processing unit outputs an alarm signal; when the collected voltage between the upper end and the ground is zero, and the collected voltage between the lower end and the ground is 110V, that is, the voltage between the lower end and the ground is a positive voltage, the protection tripping circuit is not conductive, the voltage is abnormal, and the programmable controller analysis and processing unit outputs an alarm signal.

[0072] Optionally, the digital acquisition unit includes at least two voltage measuring electrodes, and the voltage measuring electrodes are connected to the upper electrode or the lower electrode of the protection outlet pressure plate.

[0073] Optionally, upon receiving an alarm signal, the display alarm unit lights up an alarm diode and starts a buzzer.

[0074] Optionally, the names and numbers of different protection outlet pressure plates, the values ​​of the voltages between the upper and lower ends of the protection outlet pressure plates and the ground, and the alarm signals are displayed on the protection screen display alarm module.

[0075] Optionally, an upper end-to-ground voltage threshold and a lower end-to-ground voltage threshold of the protection outlet pressure plate are set on the alarm threshold setting submodule in the protection screen display alarm module.

[0076] Optionally, an intermediate relay isolation module is used to isolate the programmable controller analysis and processing unit from the measurement and control device connection module, receive the alarm signal of the programmable controller analysis and processing unit, and transmit the alarm signal to the measurement and control device connection module; the measurement and control device connection module is used to connect the substation public measurement and control device, and transmit the alarm signal to the substation public measurement and control device; the background monitoring transmission module is used to transmit the alarm signal from the substation public measurement and control device to the substation background monitoring machine, wherein the substation background monitoring machine is used to perform process monitoring on the substation.

[0077] Figure 5 is a logic diagram of an optional early warning monitoring method for the polarity voltage of the transformer substation protection outlet pressure plate according to an embodiment of the present invention, such as Figure 5 As shown, "start" represents the start of the early warning monitoring device for the polarity voltage of the transformer substation protection outlet pressure plate. By collecting the upper end voltage to ground and the lower end voltage to ground of the protection outlet pressure plate, it is judged whether the upper and lower end voltages to ground are polarity voltages or whether the upper end voltage to ground is zero. If the upper and lower end voltages to ground are neither polarity voltages nor the upper end voltage to ground is zero, the upper end voltage to ground and the lower end voltage to ground of the protection outlet pressure plate are collected again for judgment. If the upper and lower end voltages to ground are polarity voltages or the upper end voltage to ground is zero, the programmable controller analysis and processing unit will output an alarm signal, the display alarm unit responds to the alarm signal, outputs an alarm prompt, lights up the alarm diode and starts the buzzer. After receiving the alarm prompt, the operating object takes braking measures in time until the fault is handled. After the fault is handled, the early warning monitoring device for the polarity voltage of the transformer substation protection outlet pressure plate continues to monitor the protection outlet pressure plate and keeps running.

[0078] The steps provided by the above-mentioned early warning monitoring method for the polarity voltage of the substation protection outlet pressure plate can be achieved by collecting the voltage between the upper and lower ends of each protection outlet pressure plate in the substation protection device, converting the voltage between the upper and lower ends to the ground into a voltage digital signal, and then executing the polarity voltage alarm discrimination strategy. When the voltage between the upper and lower ends to the ground is a polarity voltage or the voltage between the upper end and the ground is zero, an alarm signal is output, and finally an alarm prompt is output based on the alarm signal. The embodiment of the present invention uses an early warning monitoring device for the polarity voltage of the substation protection outlet pressure plate to promptly discover the situation where the voltage between the upper and lower ends of the protection outlet pressure plate to the ground is a polarity voltage or the voltage between the upper end and the ground is zero, thereby effectively reducing the possibility of tripping accidents caused by operational errors, significantly improving work efficiency, and thus solving the technical problem of low work efficiency when performing polarity voltage monitoring on the substation protection outlet pressure plate in the related technology.

[0079] According to another aspect of an embodiment of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored computer program, wherein when the computer program is running, the device where the computer-readable storage medium is located is controlled to execute the early warning monitoring method for the opposite polarity voltage of the substation protection outlet pressure plate of any one of the above-mentioned embodiments one.

[0080] According to another aspect of an embodiment of the present invention, there is also provided an electronic device, comprising one or more processors and a memory, the memory being used to store one or more programs, wherein when the one or more programs are executed by one or more processors, the one or more processors implement the early warning monitoring method for the opposite polarity voltage of the substation protection outlet pressure plate of any one of the above-mentioned embodiments one.

[0081] The present application also provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of the early warning monitoring method for the different polarity voltage of the transformer substation protection outlet pressure plate described in each embodiment of the present application.

[0082] The present application also provides a computer program product, including a non-volatile computer-readable storage medium, wherein the non-volatile computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the early warning monitoring method for the opposite polarity voltage of the substation protection outlet pressure plate described in each embodiment of the present application are implemented.

[0083] Figure 6 1 is a hardware structure block diagram of an electronic device (or mobile device) for an early warning monitoring method of a transformer substation protection outlet pressure plate different polarity voltage according to an embodiment of the present invention. Figure 6 As shown, the electronic device may include one or more ( Figure 6 602a, 602b, ..., 602n are used to illustrate) a processor (the processor may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA), and a memory 604 for storing data. In addition, it may also include: a display, an input / output interface (I / O interface), a universal serial bus (USB) port (which may be included as one of the ports of the I / O interface), a network interface, a keyboard, a power supply and / or a camera. It can be understood by those skilled in the art that Figure 6 The structure shown is only for illustration and does not limit the structure of the above electronic device. Figure 6 More or fewer components as shown, or with Figure 6 Different configurations are shown.

[0084] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0085] In the above embodiments of the present invention, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0086] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0087] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0088] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0089] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0090] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An early warning monitoring device for the voltage of the opposite polarity of the protection outlet pressure plate of a substation, characterized in that: include: A digital acquisition unit is used to collect the voltage between the upper and lower ends of each protection outlet pressure plate in the substation protection device to the ground, wherein the voltage between the upper and lower ends to the ground is a voltage analog signal; An A / D conversion unit, used for converting the voltages of the upper and lower ends to ground into voltage digital signals; A programmable controller analysis and processing unit, used for executing a different polarity voltage alarm discrimination strategy, wherein the different polarity voltage alarm discrimination strategy includes: outputting an alarm signal when the voltages of the upper and lower ends to the ground are different polarity voltages, or when the voltage of the upper end to the ground is zero; The display alarm unit outputs an alarm prompt based on the alarm signal.

2. The early warning monitoring device according to claim 1, characterized in that: The digital acquisition unit comprises: at least two voltage measuring electrodes, and the voltage measuring electrodes are used to connect the upper electrode or the lower electrode of the protection outlet pressure plate.

3. The early warning monitoring device according to claim 1, characterized in that: The display alarm unit comprises: an alarm diode, which is lit by the display alarm unit when the alarm signal is received; and a buzzer, which is activated by the display alarm unit when the alarm signal is received.

4. The early warning monitoring device according to claim 1, characterized in that: The display alarm unit also includes: a protection screen display alarm module, which is used to display the names and numbers of the different protection outlet pressure plates, the values ​​of the voltages between the upper and lower ends of the protection outlet pressure plates and the ground, and the alarm signal.

5. The early warning monitoring device according to claim 4, characterized in that: The protection screen display alarm module includes: an alarm threshold setting submodule, which is used to set the upper end-to-ground voltage threshold and the lower end-to-ground voltage threshold of the protection outlet pressure plate.

6. The early warning monitoring device according to claim 1, characterized in that: The display alarm unit also includes: An intermediate relay isolation module, used to isolate the programmable controller analysis and processing unit from the measurement and control device connection module, receive the alarm signal from the programmable controller analysis and processing unit, and transmit the alarm signal to the measurement and control device connection module; The measurement and control device connection module is used to connect to the common measurement and control device of the substation and transmit the alarm signal to the common measurement and control device of the substation; The background monitoring transmission module is used to transmit the alarm signal from the substation public measurement and control device to the substation background monitoring machine, wherein the substation background monitoring machine is used to perform process monitoring on the substation.

7. A method for early warning monitoring of voltage of different polarity of the protection outlet pressure plate of a substation, characterized in that: The early warning monitoring device for the voltage of the polarity difference of the transformer substation protection outlet pressure plate as claimed in any one of claims 1 to 6, and the early warning monitoring method for the voltage of the polarity difference of the transformer substation protection outlet pressure plate comprises: Collecting the voltage between the upper and lower ends of each protection outlet pressure plate in the substation protection device to the ground, wherein the voltage between the upper and lower ends to the ground is a voltage analog signal; Convert the voltage between the upper and lower ends to ground into a voltage digital signal; Executing a different-polarity voltage alarm discrimination strategy, outputting an alarm signal when the voltages of the upper and lower ends to the ground are different-polarity voltages or the voltage of the upper end to the ground is zero; An alarm prompt is output based on the alarm signal.

8. The early warning monitoring method according to claim 7, characterized in that: The discrimination criteria of the different polarity voltage alarm discrimination strategy include: The first criterion is that when the voltage between the upper end and the ground is a negative voltage and the voltage between the lower end and the ground is zero, the voltage is determined to be normal; The second judgment standard is, when the voltage of the upper end to the ground is a negative voltage and the voltage of the lower end to the ground is a positive voltage, judging that the voltages of the upper and lower ends to the ground are voltages of different polarities, and outputting an alarm signal; A third criterion is to determine that the voltage is abnormal and output an alarm signal when the voltage between the upper end and the ground is zero and the voltage between the lower end and the ground is zero; The fourth criterion is that when the voltage between the upper end and the ground is zero and the voltage between the lower end and the ground is a positive polarity voltage, it is determined that the voltage is abnormal and an alarm signal is output.

9. An electronic device, characterized in that: It includes one or more processors and a memory, wherein the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors implement the early warning monitoring method for the opposite polarity voltage of the substation protection outlet pressure plate as described in any one of claims 7 or 8.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by the processor, the steps of the early warning monitoring method for the polarity voltage of the transformer substation protection outlet pressure plate described in any one of claims 7 or 8 are implemented.

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