On-line monitoring and state early warning system for power transmission and transformation stations and extra-high voltage converter stations

Abstract

The invention discloses an on-line monitoring and state early warning system for a power transmission and transformation station and an extra-high voltage converter station, and belongs to the technical field of power monitoring. Comprising a data acquisition unit, a parameter setting unit, a network transmission unit, a comparison statistics unit, a data management unit, a core analysis unit and a display early warning unit. The method comprises the following steps of: obtaining the total duration of a statistical period, the duration of each fault, the response duration of each fault, the total number of days of the statistical period, the number of days of the fault, the number of times of the fault of each day and the maximum number of times of the single day in the statistical period of each power transmission and transformation station and the extra-high voltage converter station; the risk indexes of each transmission and transformation station and the extra-high voltage converter station are obtained through comprehensive analysis according to the data, so that the current risk of the risk indexes of each transmission and transformation station and the extra-high voltage converter station can be obtained according to the risk indexes of each transmission and transformation station and the extra-high voltage converter station, the larger the risk index is, the higher the current risk is, and otherwise, the higher the current risk is. The lower the current risk is.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power monitoring, and in particular to an online monitoring and status early warning system for a transmission and substation and an ultra-high voltage converter station. Background Art

[0002] As the core components of the UHV power system, the reliable operation of substations and UHV converter stations plays a vital role in the sustainable development of the power industry. In order to ensure the normal operation of substations and UHV converter stations, the measurement data of various remote control terminals and sensors in substations and UHV converter stations show exponential growth. A large amount of data needs to be sampled and processed in real time. Traditional manual data collection can no longer meet the security requirements. Summary of the invention

[0003] Purpose of the invention: The purpose of the present invention is to provide an online monitoring and status warning system for transmission and substations and ultra-high voltage converter stations; it can solve the problem that traditional manual data collection can no longer meet safety requirements.

[0004] Technical solution: To solve the above technical problems, according to one aspect of the present invention, more specifically, an online monitoring and status warning system for a transmission and substation and a UHV converter station, comprising: a data acquisition unit, a parameter setting unit, a network transmission unit, a comparison and statistics unit, a data management unit, a core analysis unit, and a display and warning unit;

[0005] Data acquisition unit: used to collect various data on transmission and substations and UHV converter stations required by the online monitoring and status warning system;

[0006] Parameter setting unit: used to set the thresholds of various parameters required by the online monitoring and status warning system for the transmission and substation, UHV converter station, and the data related data of the report generated by the core analysis unit;

[0007] Network transmission unit: used to transmit the data collected by the data collection unit, the parameters set by the parameter setting unit and the data stored by the data management unit to the comparison and statistics unit, and transmit the data collected by the data collection unit and the statistical comparison and statistics results of the comparison and statistics unit to the data management unit and the core analysis unit, and transmit the threshold of the data related data of the report generated by the analysis of the core analysis unit set by the parameter setting unit and the report generated by the analysis and processing of the core analysis unit to the display and early warning unit;

[0008] Comparison and statistics unit: used to obtain the data collected by the data collection unit, the parameters set by the parameter setting unit and the data stored by the data management unit, and compare the obtained data and make statistics on the comparison results;

[0009] Data management unit: used to store and manage the results of comparison and statistics of the comparison and statistics unit;

[0010] Core analysis unit: used to receive the data collected by the data collection unit and the statistical comparison and statistics results of the comparison and statistics unit, analyze and process the received data and the comparison and statistics results, and generate various reports on the transmission and substation and UHV converter station according to the analysis and processing results;

[0011] Display and early warning unit: used to receive the thresholds of data related to the report generated by the core analysis unit analysis set by the parameter setting unit and the report generated by the core analysis unit analysis and processing, and to display the received report, and at the same time give early warning prompts based on the relevant data of the received report and the thresholds of the relevant data.

[0012] Furthermore, the data acquisition unit includes: a current acquisition module, a voltage acquisition module, a power acquisition module, a duration acquisition module, a day acquisition module and a number acquisition module;

[0013] Current acquisition module: used to collect various current data required for online monitoring and status warning systems;

[0014] Voltage acquisition module: used to collect various voltage data required for online monitoring and status warning systems;

[0015] Power acquisition module: used to collect various data on active power required by the online monitoring and status warning system;

[0016] Duration collection module: used to collect various duration data required for online monitoring and status warning systems;

[0017] Days collection module: used to collect various data on days required for online monitoring and status warning systems;

[0018] Frequency collection module: used to collect various frequency data required for online monitoring and status warning systems.

[0019] Furthermore, the parameter setting unit includes: a standard value setting module, an upper and lower limit setting module, and a threshold setting module;

[0020] Standard value setting module: used to set the standard values ​​of current, voltage and active power of transmission and substations and UHV converter stations;

[0021] Upper and lower limit setting module: used to set the upper and lower limit floating values ​​of the standard values ​​of current, voltage and active power of transmission and substations and UHV converter stations;

[0022] Threshold setting module: used to set the threshold of data related to the report generated by the core analysis unit.

[0023] Furthermore, the comparison and statistics unit includes: a data acquisition module, a data comparison module and a result statistics module;

[0024] Data acquisition module: used to obtain the data on current, voltage and active power required by the online monitoring and status warning system collected by the data acquisition unit, the standard values ​​and upper and lower limit floating values ​​of the current, voltage and active power of the transmission and substation and UHV converter station set by the parameter setting unit, and the data stored in the data management unit;

[0025] Data comparison module: used to compare the data obtained by the data acquisition module;

[0026] Result statistics module: used to count the comparison results of the data comparison module to obtain various statistical data.

[0027] Furthermore, the core analysis unit includes: a data receiving module, an analysis processing module and a report generating module;

[0028] Data receiving module: used to receive the data on duration, days, times and the statistical data of the data comparison results collected by the comparison and statistics unit required by the online monitoring and status warning system;

[0029] Analysis and processing module: used to analyze and process the data received by the data receiving module to obtain analysis and processing results;

[0030] Report generation module: used to generate various reports on transmission and substations and UHV converter stations based on the analysis and processing results of the analysis and processing module.

[0031] Furthermore, the display warning unit includes: a report and threshold receiving module, a report display module and a warning prompt module;

[0032] Report and threshold receiving module: used for receiving the threshold of data related to the report generated by the core analysis unit analysis set by the parameter setting unit and the report generated by the core analysis unit analysis and processing;

[0033] Report display module: used to receive and display the report generated by the core analysis unit analysis and processing received by the report and threshold receiving module;

[0034] Early warning prompt module: used to provide early warning prompts according to the threshold of data related to the report generated by the core analysis unit analysis set by the parameter setting unit and the report generated by the core analysis unit analysis and processing.

[0035] Furthermore, when performing analysis and processing, the analysis and processing module can obtain the operating parameter fluctuation index of each transmission and substation and UHV converter station by comprehensively analyzing the values ​​of each current, voltage and active power exceeding the upper and lower limits of the standard values ​​of each transmission and substation and UHV converter station, the duration of each current, voltage and active power exceeding the upper and lower limits of the standard values ​​of each transmission and substation and UHV converter station, the standard values ​​of the current, voltage and active power of each transmission and substation and UHV converter station, and the upper and lower limit floating values ​​of the standard values ​​of the current, voltage and active power of each transmission and substation and UHV converter station:

[0036]

[0037] Therefore, the operation status of each substation and UHV converter station can be obtained according to the operation parameter fluctuation index of each substation and UHV converter station. The larger the operation parameter fluctuation index, the worse the operation status of the substation and UHV converter station is, and the more attention is needed. The smaller the operation parameter fluctuation index, the better the operation status of the substation and UHV converter station is. Among them, YZ is the operation parameter fluctuation index of the substation and UHV converter station, T is the operation time of the substation and UHV converter station in the statistical period, and BI is i The value of each current exceeding the upper and lower limits of the standard value at the transmission and substation and UHV converter station, BIT i is the duration of each current exceeding the upper and lower limits of the standard value at the transmission and substation and the UHV converter station, I is the standard value of the current at the transmission and substation and the UHV converter station, and I s It is the upper limit floating value of the standard value of the current of the transmission and substation and UHV converter station, I x is the floating value of the lower limit of the standard value of the current of the transmission and substation and the UHV converter station, n1 is the number of times the current of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the current standard value, BU i It is the value of the voltage exceeding the upper and lower limits of the standard value each time at the transmission and substation and UHV converter station. i is the duration of each time when the voltage of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the standard value, U is the standard value of the voltage of the transmission and substation and the UHV converter station, and U s It is the upper limit floating value of the standard value of the voltage of the transmission and substation and UHV converter station, U x is the floating value of the lower limit of the standard voltage of the transmission and substation and the UHV converter station, n2 is the number of times the voltage of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the standard voltage, BP i BPT is the value of each time the active power of the transmission substation and UHV converter station exceeds the upper and lower limits of the standard value. i is the duration of each time when the active power of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the standard value, P is the standard value of the active power of the transmission and substation and the UHV converter station, and P sP is the upper limit floating value of the standard value of active power of transmission and substation and UHV converter station, x It is the floating value of the lower limit of the standard value of active power of transmission and substation and UHV converter station, and n3 is the number of times the active power of transmission and substation and UHV converter station exceeds the upper and lower limits of the standard value of active power.

[0038] Furthermore, when performing analysis and processing, the analysis and processing module can obtain the total duration of the statistical period of each transmission and substation and UHV converter station, the duration of each fault, the response time for each fault, the total number of days in the statistical period, the number of days when faults occur, the number of faults that occur on the day of each fault, and the maximum number of faults in a single day during the statistical period, and obtain the risk index of each transmission and substation and UHV converter station based on a comprehensive analysis of the above data:

[0039]

[0040] Therefore, the current risk level of each transmission and substation and UHV converter station can be obtained based on the risk index of each transmission and substation and UHV converter station. The larger the risk index, the higher the current risk, and vice versa. Among them, FI is the risk index of the transmission and substation and UHV converter station, ZT is the total duration of the statistical period, and GT is the total duration of the statistical period. i is the duration of each failure, XT i is the response time for each fault, ZD is the total number of days in the statistical period, GD is the number of days when the fault occurs, and N i For each failure, the number of failures that occurred on that day, N max It is the maximum number of failures in a single day during the statistical period.

[0041] Furthermore, the early warning prompt module will issue an early warning prompt and promptly inform the existence of the corresponding situation when the operating parameter fluctuation index of the transmission and substation and the ultra-high voltage converter station exceeds the threshold value of the operating parameter fluctuation index of the transmission and substation and the ultra-high voltage converter station set by the threshold setting module, or the risk index of the transmission and substation and the ultra-high voltage converter station exceeds the threshold value set by the threshold setting module or the threshold value of the risk index of the transmission and substation and the ultra-high voltage converter station.

[0042] Beneficial effect: The present invention obtains the operating parameter fluctuation index of each transmission and substation and UHV converter station by comprehensively analyzing the values ​​of each time when the current, voltage and active power of each transmission and substation and UHV converter station exceed the upper and lower limits of the standard values, the duration of each time when the current, voltage and active power of each transmission and substation and UHV converter station exceed the upper and lower limits of the standard values, the standard values ​​of the current, voltage and active power of each transmission and substation and UHV converter station, and the upper and lower limit floating values ​​of the standard values ​​of the current, voltage and active power of each transmission and substation and UHV converter station, so as to obtain the operating parameter fluctuation index of each transmission and substation and UHV converter station, so as to obtain the operating status of each transmission and substation and UHV converter station according to the operating parameter fluctuation index of each transmission and substation and UHV converter station, the larger the operating parameter fluctuation index, the worse the operating status of the transmission and substation and UHV converter station is, and the more attention it needs, and the smaller the operating parameter fluctuation index, the better the operating status of the transmission and substation and UHV converter station is. At the same time, the total duration of the statistical cycle of each transmission and substation and ultra-high voltage converter station, the duration of each fault, the response time of each fault, the total number of days in the statistical cycle, the number of days when faults occur, the number of faults that occur on the same day of each fault, and the maximum number of faults in a single day in the statistical cycle can be obtained, and the risk index of each transmission and substation and ultra-high voltage converter station can be obtained through comprehensive analysis of the above data, so that the current risk level of the risk index of each transmission and substation and ultra-high voltage converter station can be obtained according to the risk index of each transmission and substation and ultra-high voltage converter station. The larger the risk index, the higher the current risk, and vice versa. In addition, when the operating parameter fluctuation index of the transmission and substation and ultra-high voltage converter station exceeds the threshold value of the operating parameter fluctuation index of the transmission and substation and ultra-high voltage converter station set by the threshold setting module, or when the risk index of the transmission and substation and ultra-high voltage converter station exceeds the threshold value set by the threshold setting module or the threshold value of the risk index of the transmission and substation and ultra-high voltage converter station, an early warning prompt module will be used to issue an early warning prompt and timely corresponding situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the system principle. DETAILED DESCRIPTION

[0044] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0045] Example 1

[0046] Firstly, various data on current, various data on voltage, various data on active power, various data on duration, various data on days and various data on number of times required for the online monitoring and status warning system are collected through the current collection module, voltage collection module, power collection module, duration collection module, day collection module and number collection module of the data collection unit, and the standard value and the upper and lower limit floating values ​​of the current, voltage and active power of the transmission and substation and UHV converter station are set through the standard value setting module, upper and lower limit setting module and threshold setting module of the parameter setting unit.

[0047] Then, the data acquisition module of the comparison statistics unit obtains the data on current, voltage, and active power required for the online monitoring and status warning system collected by the data acquisition unit, the standard values ​​of current, voltage, and active power of the transmission and substation and UHV converter station set by the parameter setting unit, and their upper and lower limit floating values, and the data stored in the data management unit, and compares the data obtained by the data acquisition module through the data comparison module, and statistics the comparison results of the data comparison module through the result statistics module to obtain various statistical data.

[0048] Then, the data receiving module of the core analysis unit receives the data required for the online monitoring and status warning system, including the data on duration, days, and times collected by the data collection unit, as well as the statistical data of the data comparison results collected by the comparison and statistics unit. The analysis and processing module then analyzes and processes the data received by the data receiving module to obtain the analysis and processing results. The report generation module generates various reports on the transmission and substation and the UHV converter station according to the analysis and processing results of the analysis and processing module.

[0049] When performing analysis and processing, the analysis and processing module can obtain the operating parameter fluctuation index of each transmission and substation and UHV converter station by comprehensively analyzing the values ​​of each current, voltage and active power exceeding the upper and lower limits of the standard values, the duration of each current, voltage and active power exceeding the upper and lower limits of the standard values, the standard values ​​of each transmission and substation and UHV converter station, and the upper and lower limit floating values ​​of the standard values ​​of current, voltage and active power of each transmission and substation and UHV converter station:

[0050]

[0051] Therefore, the operation status of each substation and UHV converter station can be obtained according to the operation parameter fluctuation index of each substation and UHV converter station. The larger the operation parameter fluctuation index, the worse the operation status of the substation and UHV converter station is, and the more attention is needed. The smaller the operation parameter fluctuation index, the better the operation status of the substation and UHV converter station is. Among them, YZ is the operation parameter fluctuation index of the substation and UHV converter station, T is the operation time of the substation and UHV converter station in the statistical period, and BI is i The value of each current exceeding the upper and lower limits of the standard value at the transmission and substation and UHV converter station, BIT i is the duration of each current exceeding the upper and lower limits of the standard value at the transmission and substation and the UHV converter station, I is the standard value of the current at the transmission and substation and the UHV converter station, and I s It is the upper limit floating value of the standard value of the current of the transmission and substation and UHV converter station, I x is the floating value of the lower limit of the standard value of the current of the transmission and substation and the UHV converter station, n1 is the number of times the current of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the current standard value, BU i It is the value of the voltage exceeding the upper and lower limits of the standard value each time at the transmission and substation and UHV converter station. i is the duration of each time when the voltage of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the standard value, U is the standard value of the voltage of the transmission and substation and the UHV converter station, and U s It is the upper limit floating value of the standard value of the voltage of the transmission and substation and UHV converter station, U x is the floating value of the lower limit of the standard voltage of the transmission and substation and the UHV converter station, n2 is the number of times the voltage of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the standard voltage, BP i BPT is the value of each time the active power of the transmission substation and UHV converter station exceeds the upper and lower limits of the standard value. i is the duration of each time when the active power of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the standard value, P is the standard value of the active power of the transmission and substation and the UHV converter station, and P s P is the upper limit floating value of the standard value of active power of transmission and substation and UHV converter station, x It is the floating value of the lower limit of the standard value of active power of transmission and substation and UHV converter station, and n3 is the number of times the active power of transmission and substation and UHV converter station exceeds the upper and lower limits of the standard value of active power.

[0052] When performing analysis and processing, the analysis and processing module can obtain the total duration of the statistical cycle of each transmission and substation and UHV converter station, the duration of each fault, the response time for each fault, the total number of days in the statistical cycle, the number of days when faults occur, the number of faults that occur on each day when a fault occurs, and the maximum number of faults in a single day during the statistical cycle, and obtain the risk index of each transmission and substation and UHV converter station based on a comprehensive analysis of the above data:

[0053]

[0054] Therefore, the current risk level of each transmission and substation and UHV converter station can be obtained based on the risk index of each transmission and substation and UHV converter station. The larger the risk index, the higher the current risk, and vice versa. Among them, FI is the risk index of the transmission and substation and UHV converter station, ZT is the total duration of the statistical period, and GT is the total duration of the statistical period. i is the duration of each failure, XT i is the response time for each fault, ZD is the total number of days in the statistical period, GD is the number of days when the fault occurs, and N i For each failure, the number of failures that occurred on that day, N max It is the maximum number of failures in a single day during the statistical period.

[0055] Finally, the report of the early warning unit is displayed, and the threshold receiving module receives the threshold of the data-related data of the report generated by the core analysis unit analysis set by the parameter setting unit and the report generated by the core analysis unit analysis and processing. The report generated by the core analysis unit analysis and processing of the received report is displayed through the display module, and when the operating parameter fluctuation index of the substation and the UHV converter station exceeds the threshold of the operating parameter fluctuation index of the substation and the UHV converter station set by the threshold setting module, or the risk index of the substation and the UHV converter station exceeds the threshold set by the threshold setting module or the threshold of the risk index of the substation and the UHV converter station, the early warning prompt module will issue an early warning prompt and the corresponding situation will be timely detected.

[0056] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. An online monitoring and status warning system for transmission and substations and ultra-high voltage converter stations, characterized in that: include: Data collection unit, parameter setting unit, network transmission unit, comparison and statistics unit, data management unit, core analysis unit and display and early warning unit; Data acquisition unit: used to collect various data on transmission and substations and UHV converter stations required by the online monitoring and status warning system; Parameter setting unit: used to set the thresholds of various parameters required by the online monitoring and status warning system for the transmission and substation, UHV converter station, and the data related data of the report generated by the core analysis unit; Network transmission unit: used to transmit the data collected by the data collection unit, the parameters set by the parameter setting unit and the data stored by the data management unit to the comparison and statistics unit, and transmit the data collected by the data collection unit and the statistical comparison and statistics results of the comparison and statistics unit to the data management unit and the core analysis unit, and transmit the threshold of the data related data of the report generated by the analysis of the core analysis unit set by the parameter setting unit and the report generated by the analysis and processing of the core analysis unit to the display and early warning unit; Comparison and statistics unit: used to obtain the data collected by the data collection unit, the parameters set by the parameter setting unit and the data stored by the data management unit, and compare the obtained data and make statistics on the comparison results; Data management unit: used to store and manage the results of comparison and statistics of the comparison and statistics unit; Core analysis unit: used to receive the data collected by the data collection unit and the statistical comparison and statistics results of the comparison and statistics unit, analyze and process the received data and the comparison and statistics results, and generate various reports on the transmission and substation and UHV converter station according to the analysis and processing results; Display and early warning unit: used to receive the thresholds of data related to the report generated by the core analysis unit analysis set by the parameter setting unit and the report generated by the core analysis unit analysis and processing, and to display the received report, and at the same time give early warning prompts based on the relevant data of the received report and the thresholds of the relevant data.

2. The online monitoring and status warning system for a transmission and substation and a UHV converter station according to claim 1 is characterized by: The data acquisition unit includes: a current acquisition module, a voltage acquisition module, a power acquisition module, a duration acquisition module, a day acquisition module and a number acquisition module; Current acquisition module: used to collect various current data required for online monitoring and status warning systems; Voltage acquisition module: used to collect various voltage data required for online monitoring and status warning systems; Power acquisition module: used to collect various data on active power required by the online monitoring and status warning system; Duration collection module: used to collect various duration data required for online monitoring and status warning systems; Days collection module: used to collect various data on days required for online monitoring and status warning systems; Frequency collection module: used to collect various frequency data required for online monitoring and status warning systems.

3. The online monitoring and status warning system for a transmission and substation and a UHV converter station according to claim 2 is characterized by: The parameter setting unit includes: a standard value setting module, an upper and lower limit setting module and a threshold setting module; Standard value setting module: used to set the standard values ​​of current, voltage and active power of transmission and substations and UHV converter stations; Upper and lower limit setting module: used to set the upper and lower limit floating values ​​of the standard values ​​of current, voltage and active power of transmission and substations and UHV converter stations; Threshold setting module: used to set the threshold of data related to the report generated by the core analysis unit.

4. The online monitoring and status warning system for a transmission and substation and a UHV converter station according to claim 3 is characterized by: The comparison and statistics unit includes: a data acquisition module, a data comparison module and a result statistics module; Data acquisition module: used to obtain the data on current, voltage and active power required by the online monitoring and status warning system collected by the data acquisition unit, the standard values ​​and upper and lower limit floating values ​​of the current, voltage and active power of the transmission and substation and UHV converter station set by the parameter setting unit, and the data stored in the data management unit; Data comparison module: used to compare the data obtained by the data acquisition module; Result statistics module: used to count the comparison results of the data comparison module to obtain various statistical data.

5. The online monitoring and status warning system for transmission and substation and UHV converter station according to claim 4 is characterized by: The core analysis unit includes: a data receiving module, an analysis and processing module, and a report generating module; Data receiving module: used to receive the data on duration, days, times and the statistical data of the data comparison results collected by the comparison and statistics unit required by the online monitoring and status warning system; Analysis and processing module: used to analyze and process the data received by the data receiving module to obtain analysis and processing results; Report generation module: used to generate various reports on transmission and substations and UHV converter stations based on the analysis and processing results of the analysis and processing module.

6. The online monitoring and status warning system for transmission and substation and UHV converter station according to claim 5 is characterized by: The display warning unit includes: a report and threshold receiving module, a report display module and a warning prompt module; Report and threshold receiving module: used for receiving the threshold of data related to the report generated by the core analysis unit analysis set by the parameter setting unit and the report generated by the core analysis unit analysis and processing; Report display module: used to receive and display the report generated by the core analysis unit analysis and processing received by the report and threshold receiving module; Early warning prompt module: used to provide early warning prompts according to the threshold of data related to the report generated by the core analysis unit analysis set by the parameter setting unit and the report generated by the core analysis unit analysis and processing.

7. The online monitoring and status warning system for transmission and substation and UHV converter station according to claim 6 is characterized by: When performing analysis and processing, the analysis and processing module can obtain the operation parameter fluctuation index of each transmission and substation and UHV converter station by comprehensively analyzing the values ​​of each current, voltage and active power exceeding the upper and lower limits of the standard values ​​of each transmission and substation and UHV converter station, the duration of each current, voltage and active power exceeding the upper and lower limits of the standard values ​​of each transmission and substation and UHV converter station, the standard values ​​of the current, voltage and active power of each transmission and substation and UHV converter station, and the upper and lower limit floating values ​​of the standard values ​​of the current, voltage and active power of each transmission and substation and UHV converter station: Therefore, the operation status of each substation and UHV converter station can be obtained according to the operation parameter fluctuation index of each substation and UHV converter station. The larger the operation parameter fluctuation index, the worse the operation status of the substation and UHV converter station is, and the more attention is needed. The smaller the operation parameter fluctuation index, the better the operation status of the substation and UHV converter station is. Among them, YZ is the operation parameter fluctuation index of the substation and UHV converter station, T is the operation time of the substation and UHV converter station in the statistical period, and BI is i The value of each current exceeding the upper and lower limits of the standard value at the transmission and substation and UHV converter station, BIT i is the duration of each current exceeding the upper and lower limits of the standard value at the transmission and substation and the UHV converter station, I is the standard value of the current at the transmission and substation and the UHV converter station, and I s It is the upper limit floating value of the standard value of the current of the transmission and substation and UHV converter station, I x is the floating value of the lower limit of the standard value of the current of the transmission and substation and the UHV converter station, n1 is the number of times the current of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the current standard value, BU i It is the value of the voltage exceeding the upper and lower limits of the standard value each time at the transmission and substation and UHV converter station. i is the duration of each time when the voltage of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the standard value, U is the standard value of the voltage of the transmission and substation and the UHV converter station, and U s It is the upper limit floating value of the standard value of the voltage of the transmission and substation and UHV converter station, U x is the floating value of the lower limit of the standard voltage of the transmission and substation and the UHV converter station, n2 is the number of times the voltage of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the standard voltage, BP i BPT is the value of each time the active power of the transmission substation and UHV converter station exceeds the upper and lower limits of the standard value. i is the duration of each time when the active power of the transmission and substation and the UHV converter station exceeds the upper and lower limits of the standard value, P is the standard value of the active power of the transmission and substation and the UHV converter station, P s P is the upper limit floating value of the standard value of active power of transmission and substation and UHV converter station, x It is the floating value of the lower limit of the standard value of active power of transmission and substation and UHV converter station, and n3 is the number of times the active power of transmission and substation and UHV converter station exceeds the upper and lower limits of the standard value of active power.

8. The online monitoring and status warning system for transmission and substation and UHV converter station according to claim 6 is characterized by: When performing analysis and processing, the analysis and processing module can obtain the total duration of the statistical period of each transmission and substation and ultra-high voltage converter station, the duration of each fault, the response time of each fault, the total number of days in the statistical period, the number of days when faults occurred, the number of faults occurring on the day of each fault, and the maximum number of faults in a single day during the statistical period, and obtain the risk index of each transmission and substation and ultra-high voltage converter station through comprehensive analysis based on the above data: Therefore, the current risk level of each transmission and substation and UHV converter station can be obtained based on the risk index of each transmission and substation and UHV converter station. The larger the risk index, the higher the current risk, and vice versa. Among them, FI is the risk index of the transmission and substation and UHV converter station, ZT is the total duration of the statistical period, and GT is the total duration of the statistical period. i is the duration of each failure, XT i is the response time for each fault, ZD is the total number of days in the statistical period, GD is the number of days when the fault occurs, and N i For each failure, the number of failures that occurred on that day, N max It is the maximum number of failures in a single day during the statistical period.

9. The online monitoring and status warning system for transmission and substation and UHV converter station according to claim 8, characterized in that: When the operating parameter fluctuation index of the transmission and substation and the ultra-high voltage converter station exceeds the threshold value of the operating parameter fluctuation index of the transmission and substation and the ultra-high voltage converter station set by the threshold setting module, or when the risk index of the transmission and substation and the ultra-high voltage converter station exceeds the threshold value set by the threshold setting module or the threshold value of the risk index of the transmission and substation and the ultra-high voltage converter station, the early warning prompt module will issue an early warning prompt and timely indicate the existence of the corresponding situation.

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