A substation secondary equipment direct current power supply full loop visual defect positioning method

Abstract

The application discloses a substation secondary equipment DC power supply full loop visual defect positioning method, comprising the following steps: constructing a substation secondary equipment DC power supply full loop model according to substation design drawings and a substation SCD model; visualizing and displaying a secondary equipment DC power supply full loop connection diagram and information through a hierarchical and object-based mode according to the substation secondary equipment DC power supply full loop model; collecting substation secondary equipment DC power supply full loop measuring point signals in real time and updating displayed information, visualizing and monitoring real-time information of the secondary equipment DC power supply full loop; positioning a secondary equipment DC power supply full loop defect position and alarming, and generating a secondary equipment DC power supply full loop defect report. The application can effectively improve DC power supply full loop fault defect disposal efficiency, reduce secondary equipment DC power supply full loop operation and maintenance cost, improve the power supply reliability of the secondary equipment DC power supply full loop, and provide a strong guarantee for the safe and stable operation of a power grid.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of substation secondary equipment operation and maintenance, and relates to a substation secondary equipment DC power supply full loop visual defect positioning method. BACKGROUND

[0002] With the development of social economy, the demand for electricity is growing, the scale of power grid construction is expanding, the number of secondary equipment is increasing geometrically, and the reliability of power grid operation is becoming more and more important. The DC power supply of substation secondary equipment provides operating power for secondary equipment, and the secondary equipment such as relay protection devices and measurement and control devices in the substation provides important guarantee for the safe operation of the power grid. Therefore, the DC power supply loop monitoring of secondary equipment in the substation is particularly important.

[0003] However, there are many problems in the current DC power supply loop monitoring in the substation, such as that the DC power supply full loop involves many links, the information of each link is relatively independent, there is a lack of unified modeling means to break through the barriers between links, the current DC power supply monitoring only stays in the self-monitoring of the DC power supply system, and cannot meet the requirements of the full loop monitoring of the substation in the field operation, the monitoring data function is relatively single, and it is impossible to give relevant problem disposal suggestions before the accident or after the defect occurs, manual analysis of faults is required, the equipment maintenance processing time is increased, and the reliable operation of the power grid is reduced. SUMMARY

[0004] In order to solve the problems in the prior art, the application provides a substation secondary equipment DC power supply full loop visual defect positioning method, which can effectively improve the fault defect disposal efficiency of the DC power supply full loop, reduce the operation and maintenance cost of the secondary equipment DC power supply full loop, improve the power supply reliability of the secondary equipment DC power supply full loop, and provide strong guarantee for the safe and stable operation of the power grid.

[0005] The application adopts the following technical scheme.

[0006] A substation secondary equipment DC power supply full loop visual defect positioning method comprises the following steps:

[0007] Step 1: according to the substation design drawing and the substation SCD model, a substation secondary equipment DC power supply full loop model is constructed according to objects;

[0008] Step 2: according to the substation secondary equipment DC power supply full loop model constructed in step 1, the connection diagram and information of the secondary equipment DC power supply full loop are visualized and displayed through a hierarchical and object-based manner;

[0009] Step 3: real-time acquisition of substation secondary equipment DC power supply full loop measurement point signals and updating of the information displayed in step 2, visual monitoring of real-time information of the secondary equipment DC power supply full loop;

[0010] Step 4: based on the visualization monitoring of the secondary equipment DC power supply full loop real-time information in step 3, the position of the secondary equipment DC power supply full loop defect is located and an alarm is given, and a secondary equipment DC power supply full loop defect report is generated.

[0011] Preferably, in step 1, the substation design drawings and the substation SCD model are analyzed, the secondary equipment DC power supply full loop information is extracted, and the substation secondary equipment DC power supply full loop model is constructed according to the secondary equipment device object;

[0012] The substation design drawings include substation equipment supplier factory white drawings and substation design institute design blueprints, and the substation SCD model includes a DC power supply system model and a secondary equipment model.

[0013] Preferably, in step 2, the secondary equipment DC power supply full loop connection diagram and information are visualized and displayed by layering and objecting, specifically:

[0014] The DC power supply full loop connection diagram and information are visualized and displayed layer by layer according to the substation equipment room layer, the screen cabinet layer, the device layer, and the plug-in layer, and the DC power supply loop object of each layer, wherein the visualized and displayed content specifically includes:

[0015] The full loop corresponding relationship between the equipment room DC power supply system and each secondary equipment screen cabinet is displayed according to the equipment room layer full loop, and the loop state is displayed in real time according to the DC power supply full loop monitoring node related measurement point information;

[0016] The terminal connection between the equipment screen cabinet and the DC power supply screen cabinet is displayed according to the screen cabinet layer full loop, the position coordinates of the DC power cable arrangement are displayed, and the DC power supply full loop monitoring node related measurement point information is displayed in real time;

[0017] The DC full loop connection between the screen secondary equipment device power supply air switch and the plug-in power supply, the DC system side DC terminal measurement point information, and the screen information are displayed according to the device layer full loop, and the screen secondary equipment DC terminal measurement point information, the device power supply air switch measurement point information, and the screen information are displayed;

[0018] The secondary equipment device power supply loop, the device power supply input terminal voltage, the +5V voltage, the +3.3V voltage, and the input and output plug-in terminal DC measurement point information are displayed according to the plug-in layer full loop.

[0019] Preferably, in step 3, the substation secondary equipment DC power supply full loop measurement point signal includes a telemetry signal and a telesignaling signal associated with the DC power supply full loop node position;

[0020] The telemetering signals include the DC power supply system measuring point voltage of the equipment room layer, the DC terminal measuring point voltage of the screen cabinet layer, the DC air switch measuring point voltage of the device layer, the secondary equipment DC measuring point voltage of the device layer, and the secondary equipment internal DC working voltage of the plug-in layer.

[0021] The telemetering signals include the DC power supply system measuring point voltage of the equipment room layer, the DC terminal measuring point voltage of the screen cabinet layer, the DC air switch measuring point voltage of the device layer, the secondary equipment DC measuring point voltage of the device layer, and the secondary equipment internal DC working voltage of the plug-in layer.

[0022] Preferably, in step 3, the visual monitoring of the real-time information of the secondary equipment DC power supply loop is realized by visualizing the associated telemetering signals at the monitoring nodes of the DC power supply loop and reflecting the state of the associated telemetering signals by different colors of the loop connection lines between the monitoring nodes of the DC power supply loop.

[0023] Preferably, in step 4, based on the real-time information of the secondary equipment DC power supply loop obtained by visual monitoring, the DC power supply loop of the secondary equipment is taken as a global object, the DC power supply loop measuring point signals of the power supply loop monitoring nodes are scanned from the starting node of the power supply end of the DC power supply system of the DC power supply loop to the last node inside the secondary equipment plug-in, the historical data of the measuring point signals are combined, the comprehensive state of each power supply loop monitoring node is determined by using the telemetering signal comprehensive analysis method, the comprehensive state of each power supply loop monitoring loop connection line is determined by using the telemetering signal comprehensive analysis method, the abnormal position before the fault occurs and the fault position after the fault occurs are warned and alarmed.

[0024] Preferably, the telemetering signal comprehensive analysis method comprises the following steps:

[0025] Step 41: Real-time analysis of the collected telemetering values, saving the fault information when the telemetering values of a plurality of settable consecutive sampling points are all out of limits, and real-time marking the power supply loop monitoring node to which the out-of-limit telemetering belongs with red color as the fault position after the fault occurs based on visual monitoring, as the fault position after the fault occurs, prompting the real-time fault information, and realizing fault alarm; the fault information includes fault time, fault telemetering name, fault telemetering value, telemetering upper limit value, and telemetering lower limit value.

[0026] Step 42: Real-time analysis of the collected telemetering values, saving the abnormal information when the trend slope of the telemetering values of a plurality of settable consecutive sampling points exceeds the trend threshold, and real-time marking the power supply loop monitoring node to which the telemetering value exceeding the trend threshold belongs with yellow color as the abnormal position before the fault occurs based on visual monitoring under the premise that the result of step 41 is normal, and prompting the real-time abnormal information, and realizing abnormal alarm; the abnormal information includes abnormal time, abnormal telemetering name, abnormal telemetering value, trend slope value, and trend threshold value.

[0027] Step 43: If the analysis results of steps 41 and 42 are both normal, the number of historical telemetry failures saved in step 41 and the number of historical telemetry anomalies saved in step 42 within the configurable historical period are continuously counted. If the total number of counts is greater than 0, the power circuit monitoring node to which the fault or abnormal telemetry belongs is marked in yellow in real time based on visual monitoring as the abnormal location before the fault occurs, and the counted historical fault information and historical anomaly information are prompted to implement an abnormality alarm;

[0028] Step 44: Determine the telemetry comprehensive status of the power circuit monitoring node based on the results of step 41, step 42 and step 43. The priority of obtaining the telemetry comprehensive status is from high to low: fault alarm of step 41, abnormal alarm of step 42, abnormal alarm of step 43, and telemetry analysis is normal.

[0029] Preferably, the remote signal comprehensive analysis method comprises the following steps:

[0030] Step 45: Analyze the collected telesignal values ​​in real time. When several consecutive sampling points that can be set are inconsistent with the reference value, save the fault information. Based on visual monitoring, mark the loop connection line between the monitoring nodes of the power supply circuit to which the telesignal belongs in red in real time as the fault location after the fault occurs, and prompt real-time fault information to realize fault alarm. The fault information includes fault time, fault telesignal name, fault telesignal value, and telesignal reference value.

[0031] Step 46: Analyze the collected telesignal values ​​in real time, save the abnormal information when the number of telesignal changes exceeds the frequent threshold within a configurable period, and, if the analysis result in step 45 is normal, mark the circuit connection line between the monitoring nodes of the power supply circuit to which the telesignal exceeds the frequent threshold in yellow in real time based on visual monitoring, as the abnormal location before the fault occurs, and prompt real-time abnormal information to realize abnormal alarm; the abnormal information includes abnormal time, abnormal telesignal name, abnormal telesignal value, number of changes, and frequent threshold;

[0032] Step 47: When the results of step 45 and step 46 are both normal, continue to count the number of historical telesignaling faults saved in step 45 and the number of historical telesignaling anomalies saved in step 46 within the configurable historical period. If the total number of counts is greater than 0, then based on visual monitoring, the circuit connection line between the monitoring nodes of the power supply circuit to which the fault or abnormal telesignaling belongs is marked in yellow in real time as the abnormal location before the fault occurs, and the counted historical fault information and historical anomaly information are prompted to realize an abnormality alarm;

[0033] Step 48: Determine the comprehensive telesignaling status of the power circuit monitoring connection line based on the results of step 45, step 46 and step 47. The priority of obtaining the comprehensive telesignaling status is from high to low: fault alarm of step 45, abnormal alarm of step 46, abnormal alarm of step 47, and normal telesignaling analysis.

[0034] Preferably, in step 4, the secondary equipment DC power supply full loop defect report comprises total defect statistical information, specific device defect information, and defect causes and processing suggestions according to the defect information;

[0035] The defect statistical information comprises defect occurrence time, defect occurrence equipment room information, defect occurrence screen cabinet information, and defect occurrence device information.

[0036] The specific device defect information comprises telemetry signal comprehensive analysis telemetry comprehensive state, fault information and abnormal information, telesignal comprehensive analysis telesignal comprehensive state, fault information and abnormal information, and power supply loop monitoring node information associated with telemetry or telesignal.

[0037] Preferably, the setting of defect causes and processing suggestions according to defect information types comprises:

[0038] The defect cause of the DC power supply system measuring point voltage of the equipment room layer is DC screen failure, and the processing suggestion is to check the DC screen corresponding branch power supply wiring and output condition; the defect cause of the DC terminal measuring point voltage of the screen cabinet layer is terminal wiring failure, and the processing suggestion is to check the secondary equipment screen cabinet DC power supply wiring condition; the defect cause of the DC air switch measuring point voltage of the device layer is device DC air switch failure, and the processing suggestion is to check the device DC air switch wiring and air switch condition, and if necessary, the air switch can be replaced; the defect cause of the secondary equipment DC measuring point voltage of the device layer is device terminal wiring failure, and the processing suggestion is to check the device terminal wiring condition; the defect cause of the secondary equipment internal DC working voltage of the plug-in layer is device power supply plug-in failure, and the processing suggestion is to check the device power supply plug-in condition and replace the power supply plug-in; the defect cause of the DC power supply system branch power alarm signal of the equipment room layer is DC screen failure, and the processing suggestion is to check the DC screen corresponding branch power input and output condition; the defect cause of the DC air switch on-off state of the device layer is device DC air switch failure, and the processing suggestion is to check the device DC air switch condition and replace the air switch; the defect cause of the secondary equipment DC power supply alarm signal and the secondary equipment power failure alarm signal of the device layer is device power supply plug-in failure, and the processing suggestion is to check the device power supply plug-in condition and replace the power supply plug-in.

[0039] The present application has the following advantages compared with the prior art:

[0040] The application realizes comprehensive visual monitoring on the secondary equipment DC power supply full loop by visualizing defect positioning of the secondary equipment DC power supply full loop of the transformer substation, realizes real-time mastering of the comprehensive state of the secondary equipment DC power supply full loop through the telemetry signal associated with the DC power supply full loop monitoring node and the telemetry signal comprehensive state analysis, accurately prewarns the abnormal position before defect occurrence and accurately positions the fault position after defect occurrence, discovers the defect hidden danger in advance, effectively improves the DC power supply full loop fault defect disposal efficiency, reduces the operation and maintenance cost of the secondary equipment DC power supply full loop, improves the power supply reliability of the secondary equipment DC power supply full loop, and provides strong guarantee for the safe and stable operation of the power grid. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a flow chart of a kind of transformer substation secondary equipment DC power supply full loop visual defect positioning method of the application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. The embodiments described in the present application are only a part of the embodiments of the present application, not all the embodiments. Based on the spirit of the present application, other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0043] As shown in Figure 1 Embodiment 1 of the present application provides a kind of transformer substation secondary equipment DC power supply full loop visual defect positioning method, in the preferred but not limiting embodiment of the present application, the method comprises the following steps:

[0044] Step 1: according to transformer substation design drawing and transformer substation SCD model, according to object construction transformer substation secondary equipment DC power supply full loop model;

[0045] Further preferably, transformer substation design drawing and transformer substation SCD model are analyzed, secondary equipment DC power supply full loop information is extracted, and transformer substation secondary equipment DC power supply full loop model is constructed according to secondary equipment device object; The transformer substation design drawing includes equipment supplier factory white drawing and design institute design blueprint, and the transformer substation SCD model includes DC power supply system model and secondary equipment model;

[0046] The transformer substation design drawing and the transformer substation SCD model are analyzed by the secondary equipment DC power supply full loop model tool, the secondary equipment DC power supply full loop information is automatically extracted, and the transformer substation secondary equipment DC power supply full loop model is constructed according to the object. It can solve the technical problems that each drawing is independent in reality, cannot effectively and automatically establish connection relationship, and cannot intuitively monitor the DC power supply full loop.

[0047] Step 2: According to the substation secondary equipment DC power supply full loop model, the secondary equipment DC power supply full loop connection diagram and information are visualized and displayed by layering and objecting;

[0048] Further preferably, the visualized display of the secondary equipment DC power supply full loop connection diagram and information by layering and objecting is specifically:

[0049] The DC power supply full loop connection diagram and information are visualized and displayed layer by layer in increasing order according to the substation equipment room layer, screen cabinet layer, device layer and plug-in layer, and the DC power supply loop object of each layer.

[0050] The visualized display includes:

[0051] The full loop corresponding relationship between the equipment room DC power supply system and each secondary equipment screen cabinet is displayed according to the equipment room layer full loop, and the loop state is displayed in real time according to the DC power supply full loop monitoring node related measurement point information;

[0052] The terminal connection between the equipment screen cabinet and the DC power supply screen cabinet is displayed according to the screen cabinet layer full loop, the position coordinates of the DC power cable arrangement are displayed, and the DC power supply full loop monitoring node related measurement point information is displayed in real time;

[0053] The DC full loop connection between the screen cabinet secondary equipment device power air switch and the plug-in power, the DC system side DC terminal measurement point information and the screen cabinet information, the screen cabinet secondary equipment DC terminal measurement point information, the device power air switch measurement point information and the screen cabinet information are displayed according to the device layer full loop;

[0054] The secondary equipment device power loop, device power input terminal voltage, +5V voltage, +3.3V voltage and each terminal DC measurement point information of the incoming and outgoing plug-ins are displayed according to the plug-in layer full loop.

[0055] Step 3: Real-time collection of substation secondary equipment DC power supply full loop measurement point signals and updating of the information displayed in step 2, visualized monitoring of real-time information of the secondary equipment DC power supply full loop;

[0056] Further preferably, the substation secondary equipment DC power supply full loop measurement point signals include remote measurement signals and remote signaling signals associated with the DC power supply full loop node position;

[0057] The remote measurement signals include the DC power supply system measurement point voltage of the equipment room layer, the DC terminal measurement point voltage of the screen cabinet layer, the DC air switch measurement point voltage of the device layer, the secondary equipment DC measurement point voltage of the device layer, and the secondary equipment internal DC working voltage of the plug-in layer;

[0058] The telesignals include a DC power supply system branch power alarm signal of a device room layer, a DC air switch on-off state of a device layer, a secondary device DC power alarm signal of the device layer, and a secondary device power loss alarm signal.

[0059] In addition to visualizing the associated telemetering signals at the monitoring nodes of the DC power supply loop, the inter-loop connection lines between the monitoring nodes of the DC power supply loop are reflected by different colors to reflect the states of the associated telesignals, so as to realize the visual monitoring of the real-time information of the secondary device DC power supply loop.

[0060] Step 4: Based on the real-time information of the secondary device DC power supply loop in the visual monitoring, a DC power supply loop fast tracking and accurate positioning algorithm is used to accurately position the defect position of the secondary device DC power supply loop and alarm, and a secondary device DC power supply loop defect report is generated.

[0061] Further preferably, based on the real-time information of the secondary device DC power supply loop in the visual monitoring, the secondary device DC power supply loop is taken as a global object, the DC power supply loop measurement point signals of the power supply loop monitoring nodes are scanned from the starting node of the power supply end of the DC power supply system of the DC power supply loop to the last node inside the secondary device plug-in, the historical data of the measurement point signals are combined, a telemetering signal comprehensive analysis method is used to determine the comprehensive state of each power supply loop monitoring node, a telesignal comprehensive analysis method is used to determine the comprehensive state of each power supply loop monitoring inter-loop connection line, and the abnormal position before the fault occurs and the fault position after the fault occurs are warned and alarmed;

[0062] The telemetering signal comprehensive analysis method includes the following steps:

[0063] Step 41: When the collected telemetering values at a plurality of set continuous sampling points exceed the upper limit value or are lower than the lower limit value, save the fault information and mark the telemetering belonging power supply loop monitoring node as the fault position after the fault occurs in real time based on the visual monitoring, and prompt the real-time fault information; the continuous 3 sampling points are set as the default judgment limit value, the sampling interval is 1 minute by default, and the fault information includes the fault time, the fault telemetering name, the fault telemetering value, the telemetering upper limit value, and the telemetering lower limit value;

[0064] Step 42: When the trend slope of the collected telemetering values at a plurality of set continuous sampling points exceeds the trend threshold value, save the abnormal information and the result of step 41 is normal, and mark the telemetering belonging power supply loop monitoring node as the abnormal position before the fault occurs in real time based on the visual monitoring, and prompt the real-time abnormal information; the continuous 5 sampling points are set as the default slope calculation judgment trend, the sampling interval is 1 minute by default, and the abnormal information includes the abnormal time, the abnormal telemetering name, the abnormal telemetering value, the trend slope value, and the trend threshold value;

[0065] Step 43: When the results of step 41 and step 42 are both normal, continue to count the number of historical telemetry faults saved in step 41 and the number of historical telemetry anomalies saved in step 42 within a settable historical period. If the total number of counts is greater than 0, mark the power loop monitoring node to which the telemetry belongs as the abnormal position before the fault occurs in real time based on visual monitoring, and prompt the historical fault information and historical anomaly information; the default setting is 24 hours as the statistical historical period.

[0066] Step 44: Determine the telemetry comprehensive state of the power loop monitoring node according to the results of step 41, step 42 and step 43. The priority of the telemetry comprehensive state from high to low is the fault alarm of step 41, the anomaly alarm of step 42, the anomaly alarm of step 43, and the telemetry analysis is normal.

[0067] The remote signaling comprehensive analysis method comprises the following steps:

[0068] Step 45: When the collected remote signaling value at a settable number of consecutive sampling points is inconsistent with the reference value, save the fault information and mark the loop connection line between the power loop monitoring nodes to which the remote signaling belongs as the fault position after the fault occurs in real time based on visual monitoring, and prompt the real-time fault information; the default setting is three consecutive sampling points to determine the reference value, and the sampling interval is 1 minute by default; the fault information includes fault time, fault remote signaling name, fault remote signaling value, and remote signaling reference value.

[0069] Step 46: When the number of remote signaling changes within a settable period exceeds the frequent threshold, save the anomaly information and the result of step 45 is normal, and mark the loop connection line between the power loop monitoring nodes to which the remote signaling belongs as the abnormal position before the fault occurs in real time based on visual monitoring, and prompt the real-time anomaly information; the default setting is 3 minutes for the period and 3 times for the frequent threshold by default; the anomaly information includes abnormal time, abnormal remote signaling name, abnormal remote signaling value, number of changes, and frequent threshold.

[0070] Step 47: When the results of step 45 and step 46 are both normal, continue to count the number of historical remote signaling faults saved in step 45 and the number of historical remote signaling anomalies saved in step 46 within a settable historical period. If the total number of counts is greater than 0, mark the loop connection line between the power loop monitoring nodes to which the remote signaling belongs as the abnormal position before the fault occurs in real time based on visual monitoring, and prompt the historical fault information and historical anomaly information; the default setting is 24 hours as the statistical historical period.

[0071] Step 48: Determine the remote signaling comprehensive state of the power loop monitoring connection line according to the results of step 45, step 46 and step 47. The priority of the remote signaling comprehensive state from high to low is the fault alarm of step 45, the anomaly alarm of step 46, the anomaly alarm of step 47, and the remote signaling analysis is normal.

[0072] The system displays and records the generated signal in real time, collects relevant information when the defect occurs, and generates a secondary equipment DC power supply full loop defect report.

[0073] The secondary equipment DC power supply full loop defect report includes total defect statistical information, specific device defect information, and defect causes and treatment suggestions according to the defect information.

[0074] The defect statistical information includes defect occurrence time, defect equipment room information, defect screen cabinet information, and defect device information.

[0075] The device-specific defect information includes telemetry signal comprehensive analysis, fault information and abnormal information, remote signal comprehensive analysis, fault information and abnormal information, and power supply loop monitoring node information associated with telemetry or remote signal.

[0076] According to the defect information type, the defect causes and treatment suggestions are set, such as the DC power supply system measurement point voltage of the equipment room layer, which can be set as a DC screen fault, and the treatment suggestion is to check the DC screen corresponding branch power supply wiring and output condition; the DC terminal measurement point voltage of the screen cabinet layer can be set as a terminal wiring fault, and the treatment suggestion is to check the secondary equipment screen cabinet DC power supply wiring condition; the DC air switch measurement point voltage of the device layer can be set as a device DC air switch fault, and the treatment suggestion is to check the device DC air switch wiring and air switch condition, and if necessary, the air switch can be replaced; the secondary equipment DC measurement point voltage of the device layer can be set as a device terminal wiring fault, and the treatment suggestion is to check the device terminal wiring condition; the secondary equipment internal DC working voltage of the plug-in layer can be set as a device power supply plug-in fault, and the treatment suggestion is to check the device power supply plug-in condition and replace the power supply plug-in; the DC power supply system branch power alarm signal of the equipment room layer can be set as a DC screen fault, and the treatment suggestion is to check the DC screen corresponding branch power input and output condition; the DC air switch on-off state of the device layer can be set as a device DC air switch fault, and the treatment suggestion is to check the device DC air switch condition and replace the air switch; the secondary equipment DC power supply alarm signal and the secondary equipment power loss alarm signal of the device layer can be set as a device power supply plug-in fault, and the treatment suggestion is to check the device power supply plug-in condition and replace the power supply plug-in.

[0077] The secondary equipment DC power supply full loop defect report supports historical query and display, printing and export of documents, and the format of the document is, for example, but not limited to, WORD and PDF.

[0078] The beneficial effects of the present application are that, compared with the prior art:

[0079] The application realizes comprehensive visual monitoring on the secondary equipment DC power supply full loop by visualizing defect positioning of the secondary equipment DC power supply full loop of the transformer substation, realizes real-time mastering of the comprehensive state of the secondary equipment DC power supply full loop through the telemetry signal associated with the DC power supply full loop monitoring node and the telemetry signal comprehensive state analysis, accurately prewarns the abnormal position before defect occurrence and accurately positions the fault position after defect occurrence, discovers the defect hidden danger in advance, effectively improves the DC power supply full loop fault defect disposal efficiency, reduces the operation and maintenance cost of the secondary equipment DC power supply full loop, improves the power supply reliability of the secondary equipment DC power supply full loop, and provides strong guarantee for the safe and stable operation of the power grid.

[0080] The present disclosure can be a system, a method, and / or a computer program product. The computer program product can include a computer readable storage medium (or media) having computer readable program instructions thereon for causing a processor to carry out aspects of the present disclosure.

[0081] The computer readable storage medium can be a tangible device that can retain and store instructions for use by an instruction execution device. The computer readable storage medium can be, for example, but is not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium include the following: a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanically encoded device such as punch-cards or punched-tape, a holographic storage medium, or any suitable combination of the foregoing. A computer readable storage medium, as used herein, is not to be construed as being transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission media (e.g., light pulses passing through a fiber-optic cable), or electrical signals transmitted through a wire.

[0082] Computer readable program instructions described herein can be downloaded to respective computing / processing devices from a computer readable storage medium or to an external computer or external storage device via a network, for example, the Internet, a local area network, a wide area network and / or a wireless network. The network can comprise copper transmission cables, optical transmission fibers, wireless transmission, routers, firewalls, switches, gateway computers and / or edge servers. A network adapter card or network interface in each computing / processing device receives computer readable program instructions from the network and forwards the computer readable program instructions for storage in a computer readable storage medium within the respective computing / processing device.

[0083] Computer readable program instructions for carrying out operations of the present disclosure can be assembly instructions, instruction set architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state setting data, or either source code or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C++ or the like, and conventional procedural programming languages such as the "C" programming language or similar programming languages. The computer readable program instructions can execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer can be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection can be made to an external computer (for example, through the Internet using an Internet Service Provider). In some embodiments, electronic circuitry including, for example, programmable logic circuitry, field-programmable gate arrays (FPGA), or programmable logic arrays (PLA) can execute the computer readable program instructions by utilizing state information of the computer readable program instructions to personalize the electronic circuitry, in order to perform aspects of the present disclosure.

[0084] Finally, it should be noted that the above-mentioned embodiments are merely used to illustrate the technical solutions of the present application, rather than limiting the present application, and although the present application has been described in detail with reference to the above-mentioned embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or replaced equivalently without departing from the spirit and scope of the present application, and any modification or equivalent replacement without departing from the spirit and scope of the present application should be covered in the protection scope of the claims of the present application.

Claims

1. A method for visually locating defects in the entire DC power supply circuit of secondary equipment in a substation, characterized by: The method comprises the following steps: Step 1: Based on the substation design drawings and substation SCD model, construct the full-circuit model of the DC power supply of the substation secondary equipment according to the object; Step 2: Based on the full-circuit DC power supply model of the substation secondary equipment constructed in Step 1, visualize the full-circuit connection diagram and information of the DC power supply of the secondary equipment in a hierarchical and object-based manner; Step 3: Collect the measurement point signals of the entire DC power circuit of the substation secondary equipment in real time and update the information displayed in Step 2 to visually monitor the real-time information of the entire DC power circuit of the secondary equipment; In step 3, by visually displaying the associated telemetry signals at the monitoring nodes of the entire DC power supply circuit, the circuit connection lines between the monitoring nodes of the entire DC power supply circuit reflect the status of the associated telemetering signals in different colors, thereby realizing visual monitoring of the real-time information of the entire DC power supply circuit of the secondary equipment; Step 4: Based on the real-time information of the secondary equipment DC power supply circuit monitored visually in step 3, locate the defect position of the secondary equipment DC power supply circuit, issue an alarm, and generate a secondary equipment DC power supply circuit defect report; In step 4, based on the real-time information of the DC power supply circuit of the secondary equipment monitored by visual monitoring, the DC power supply circuit of the secondary equipment is taken as the global object. From the power supply end node of the DC power supply system of the DC power supply circuit to the last node inside the secondary equipment plug-in, the DC power supply circuit measurement point signal of the power supply circuit monitoring node is scanned in the whole circuit. In combination with the historical data of the measurement point signal, the comprehensive status of the power supply circuit monitoring node is determined one by one by using the comprehensive analysis method of the telemetry signal. The comprehensive status of the power supply circuit monitoring circuit connection line is determined one by one by using the comprehensive analysis method of the telesignaling signal. The abnormal position before the fault occurs is warned and the fault position after the fault occurs is located and an alarm is issued. The telemetry signal comprehensive analysis method comprises the following steps: Step 41: Analyze the collected telemetry values ​​in real time. When the telemetry values ​​of several consecutive sampling points that can be set all exceed the limit, save the fault information. Based on visual monitoring, mark the power circuit monitoring node to which the exceeded telemetry value belongs in red in real time. This node serves as the fault location after the fault occurs, prompts the real-time fault information, and implements the fault alarm. The fault information includes the fault time, fault telemetry name, fault telemetry value, telemetry upper limit value, and telemetry lower limit value. Step 42: Analyze the collected telemetry values ​​in real time. When the trend slope of the telemetry values ​​of several consecutive sampling points that can be set exceeds the trend threshold, save the abnormal information. Under the premise that the result of step 41 is normal, based on visual monitoring, the power circuit monitoring node to which the telemetry value exceeding the trend threshold belongs is marked in yellow in real time as the abnormal location before the fault occurs, and prompt the real-time abnormal information to realize abnormal alarm. The abnormal information includes abnormal time, abnormal telemetry name, abnormal telemetry value, trend slope value, and trend threshold. Step 43: If the analysis results of steps 41 and 42 are both normal, the number of historical telemetry failures saved in step 41 and the number of historical telemetry anomalies saved in step 42 within the configurable historical period are continuously counted. If the total number of counts is greater than 0, the power circuit monitoring node to which the fault or abnormal telemetry belongs is marked in yellow in real time based on visual monitoring as the abnormal location before the fault occurs, and the counted historical fault information and historical anomaly information are prompted to implement an abnormality alarm; Step 44: Determine the telemetry comprehensive status of the power circuit monitoring node based on the results of step 41, step 42, and step 43. The priority of obtaining the telemetry comprehensive status is, from high to low, the fault alarm of step 41, the abnormal alarm of step 42, the abnormal alarm of step 43, and the telemetry analysis is normal. The remote signal comprehensive analysis method comprises the following steps: Step 45: Analyze the collected telesignal values ​​in real time. When several consecutive sampling points that can be set are inconsistent with the reference value, save the fault information. Based on visual monitoring, mark the loop connection line between the monitoring nodes of the power supply circuit to which the telesignal belongs in red in real time as the fault location after the fault occurs, and prompt real-time fault information to realize fault alarm. The fault information includes fault time, fault telesignal name, fault telesignal value, and telesignal reference value. Step 46: Analyze the collected telesignal values ​​in real time, save the abnormal information when the number of telesignal changes exceeds the frequent threshold within a configurable period, and, if the analysis result in step 45 is normal, mark the circuit connection line between the monitoring nodes of the power supply circuit to which the telesignal exceeds the frequent threshold in yellow in real time based on visual monitoring, as the abnormal location before the fault occurs, and prompt real-time abnormal information to realize abnormal alarm; the abnormal information includes abnormal time, abnormal telesignal name, abnormal telesignal value, number of changes, and frequent threshold; Step 47: When the results of step 45 and step 46 are both normal, continue to count the number of historical telesignaling faults saved in step 45 and the number of historical telesignaling anomalies saved in step 46 within the configurable historical period. If the total number of counts is greater than 0, then based on visual monitoring, the circuit connection line between the monitoring nodes of the power supply circuit to which the fault or abnormal telesignaling belongs is marked in yellow in real time as the abnormal location before the fault occurs, and the counted historical fault information and historical anomaly information are prompted to realize an abnormality alarm; Step 48: Determine the comprehensive telesignaling status of the power circuit monitoring connection line based on the results of step 45, step 46 and step 47. The priority of obtaining the comprehensive telesignaling status is from high to low: fault alarm of step 45, abnormal alarm of step 46, abnormal alarm of step 47, and normal telesignaling analysis.

2. The method for visually locating defects in the entire DC power supply circuit of a substation secondary device according to claim 1 is characterized by: In step 1, the substation design drawings and substation SCD model are analyzed to extract the full circuit information of the secondary equipment DC power supply, and a full circuit model of the substation secondary equipment DC power supply is constructed according to the secondary equipment device objects; The substation design drawings include the white drawings of the substation equipment supplier and the design blueprints of the substation design institute, and the substation SCD model includes a DC power system model and a secondary equipment model.

3. The method for visually locating defects in the entire DC power supply circuit of a substation secondary device according to claim 1 is characterized by: Step 2 describes a visual display of the secondary equipment DC power supply full circuit connection diagram and information in a layered and object-based manner, specifically: The DC power supply circuit connection diagram and information are displayed in a layer-by-layer visual manner according to the substation equipment room layer, panel cabinet layer, device layer, plug-in layer, and DC power supply circuit objects at each layer. The visual display specifically includes: Display the full circuit correspondence between the DC power supply system in the equipment room and each secondary equipment cabinet according to the full circuit of the equipment room layer, and display the circuit status in real time based on the relevant measurement point information of the DC power supply full circuit monitoring node; Display the terminal connections between the equipment cabinets and the DC power cabinets by cabinet layer, display the position coordinates of the DC power cables, and display the relevant measurement point information of the DC power full circuit monitoring nodes in real time; Displays the DC full-circuit connection between the power circuit breaker of the secondary equipment of the panel cabinet and the plug-in power supply, as well as the DC terminal measurement point information on the DC system side and the panel cabinet information, the DC terminal measurement point information of the secondary equipment of the panel cabinet, the device power circuit breaker measurement point information and the panel cabinet information according to the full circuit of the device layer; The full circuit of the plug-in layer displays the secondary equipment power supply circuit, device power input terminal voltage, +5V voltage, +3.3V voltage, and DC measurement point information of each terminal of the input plug-in and output plug-in.

4. The method for visually locating defects in the entire DC power supply circuit of a substation secondary device according to claim 1 is characterized by: The substation secondary equipment DC power supply full circuit measurement point signal in step 3 includes a telemetry signal and a telesignaling signal associated with a node position of the DC power supply full circuit; The telemetry signal includes the DC power supply system measurement point voltage at the equipment room layer, the DC terminal measurement point voltage at the panel cabinet layer, the DC circuit breaker measurement point voltage at the device layer, the secondary equipment DC measurement point voltage at the device layer, and the internal DC working voltage of the secondary equipment at the plug-in layer; The remote signaling signal includes the DC power system branch power alarm signal of the equipment room layer, the DC circuit breaker on / off status of the device layer, the secondary equipment DC power alarm signal of the device layer, and the secondary equipment power failure alarm signal.

5. The method for visually locating defects in the entire DC power supply circuit of a substation secondary device according to claim 1 is characterized by: In step 4, the secondary equipment DC power supply full circuit defect report includes overall defect statistics, specific defect information for each device, and defect causes and treatment suggestions based on the defect information; Defect statistics include the time of defect occurrence, information about the equipment room where the defect occurred, information about the panel cabinet where the defect occurred, and information about the device where the defect occurred. The specific defect information of the device includes the telemetering comprehensive status, fault information and abnormal information of the comprehensive analysis of telemetering signals, the telesignaling comprehensive status, fault information and abnormal information of the comprehensive analysis of telesignaling signals, and the power supply circuit monitoring node information associated with telemetering or telesignaling.

6. The method for visually locating defects in the entire DC power supply circuit of a substation secondary device according to claim 5, characterized in that: The defect cause and treatment suggestions given based on the defect information include: The cause of the voltage defect at the DC power supply system measuring point in the equipment room layer is the DC panel failure. The recommended solution is to check the branch power supply wiring and output of the DC panel. The cause of the voltage defect at the DC terminal measuring point in the panel cabinet layer is the terminal wiring failure. The recommended solution is to check the DC power supply wiring of the secondary equipment panel cabinet. The cause of the voltage defect at the DC circuit breaker measuring point in the device layer is the DC circuit breaker failure in the device. The recommended solution is to check the DC circuit breaker wiring and the circuit breaker condition of the device, and replace the circuit breaker if necessary. The cause of the voltage defect at the DC measuring point in the secondary equipment in the device layer is the terminal wiring failure in the device. The recommended solution is to check the terminal wiring condition of the device. The cause of the voltage defect at the DC circuit breaker measuring point in the secondary equipment in the plug-in layer is the terminal wiring failure in the device. The recommended solution is to check the terminal wiring condition of the device. The defective cause of the DC working voltage is the failure of the device power plug-in. The recommended solution is to check the condition of the device power plug-in and replace the power plug-in; the defective cause of the DC power system branch power alarm signal at the equipment room level is the failure of the DC panel. The recommended solution is to check the corresponding branch power input and output of the DC panel; the defective cause of the DC circuit breaker on the device level is the failure of the device DC circuit breaker. The recommended solution is to check the condition of the device DC circuit breaker and replace the circuit breaker; the defective cause of the secondary equipment DC power alarm signal and the secondary equipment power failure alarm signal at the device level is the failure of the device power plug-in. The recommended solution is to check the condition of the device power plug-in and replace the power plug-in.

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