Complete set switch line selection algorithm optimization method based on power positive and negative characteristic analysis

Abstract

The invention provides a complete-set switch line selection algorithm optimization method based on power positive and negative characteristic analysis, which performs signal shielding on grounding alarm of a terminal to which a complete-set switch with abnormal measurement belongs through algorithm research and judgment and analysis of the positive and negative characteristics of the complete-set switch, and improves the accuracy of alarm signals. The method comprises the following steps: S1, performing zero power inspection: inspecting whether the power of a whole set of switches in a past preset duration is over-negative or not; s2, if the power of the whole set of switch in the past preset duration is positive and the real-time power is verified to be positive, the whole set of switch participates in algorithm research and judgment, and otherwise, grounding alarm signals of the whole set of switch are filtered; and S3, if the power of the whole set of switch in a preset time period in the past is over-negative, but the switch is located in the white list and passes topological logic verification, the switch still participates in algorithm research and judgment, and otherwise, a grounding alarm signal of the switch is filtered. The method can effectively shield the misreported small current grounding alarm signal of the complete switch terminal, and facilitates the improvement of the accuracy of the complete switch line selection algorithm.

Description

Technical Field

[0001] The invention relates to the technical field of power distribution automation, and in particular to a complete set of switch line selection algorithm optimization method based on power positive and negative characteristic analysis. Background Art

[0002] Single-phase grounding fault is a type of fault that occurs frequently in distribution networks and is difficult to identify. Many scholars have proposed a number of single-phase grounding fault identification methods. Among them, the grounding fault line selection algorithm based on complete sets of switches uses the small current grounding alarm signal generated by the on-site identification of the complete sets of switches to select the fault line. Therefore, the accuracy of the small current grounding alarm signal of the complete sets of switches becomes the key to whether this method can accurately identify.

[0003] However, faced with the complex and ever-changing on-site environment and improper operation of on-site maintenance personnel, there are problems such as reverse installation of the input and output sides of the complete switch, changes in line topology (negative power transmission), which lead to errors in the terminal current phase characteristics, and then cause false alarms and missed alarms of the complete switch grounding alarm signal, resulting in poor judgment of the grounding fault line selection algorithm based on the complete switch. To this end, an optimization strategy for the complete switch line selection algorithm based on the analysis of positive and negative power characteristics is proposed. By carrying out zero-point power inspection of the complete switch, whitelist management, and real-time power verification, the signal of the small current grounding alarm of the terminal of the abnormal complete switch is shielded, and the accuracy of the grounding alarm signal of the complete switch is improved. Summary of the invention

[0004] The present invention proposes a complete switch line selection algorithm optimization method based on power positive and negative characteristic analysis, which can effectively shield the false alarm of the complete switch terminal small current grounding alarm signal, and is conducive to improving the accuracy of the complete switch line selection algorithm.

[0005] A complete set switch line selection algorithm optimization method based on power positive and negative characteristic analysis, the optimization method uses an algorithm to judge and analyze the positive and negative characteristics of the complete set switch power in the ground loss judgment analysis, and shields the ground alarm signal of the terminal to which the complete set switch with abnormal measurement belongs, so as to improve the accuracy of the complete set switch ground alarm signal, including the following steps; Step S1: Zero-point power inspection, inspecting whether the power of the complete set of switches has ever been negative within a preset period of time; Step S2: If the power of the complete switch in the past preset period of time is positive and the real-time power check is positive, the algorithm is used for judgment, otherwise the grounding alarm signal is filtered; Step S3: If the power of the complete switch has been negative within a preset period of time, but the switch is in the whitelist and has passed the topological logic check, it still participates in the algorithm analysis, otherwise, its grounding alarm signal is filtered.

[0006] The preset duration is one day.

[0007] Step S1 specifically includes the following steps: Step S1-1: After inspection, check whether the power of the complete set of switches in the past day is positive; Step S1-2: If the power has been positive for the past day, it is determined that there is no abnormality in the switch terminal set; Step S1-3: If the power has a negative value in the past day, it is suspected that the terminal is abnormal, and the operation and maintenance personnel are sent to the site to verify the wiring of the complete switch; Step S1-4: If there is an abnormality in the wiring, a defect ticket is initiated to guide the operation and maintenance organization to carry out on-site defect elimination work; Step S1-5: If there is no abnormality in the wiring, and the short-term power of the switch is negative only due to temporary factors such as temporary power transfer or distributed power supply, the switch is included in the whitelist In step S1, the zero-point power inspection is specifically as follows: a complete set of equipment connection inspection module is added to the power distribution main station. The inspection module automatically inspects the power data of the complete set of switches at zero o'clock every day to check for abnormal wiring status of the complete set of switches. After on-site verification, if the wiring is abnormal, the fault elimination process is initiated in time and the on-site fault elimination is completed. Otherwise, the complete set of switches is included in the whitelist.

[0008] The operation and maintenance organization in step S1-4 is a local municipal company.

[0009] The real-time power verification is specifically as follows: for the terminal that sends the ground alarm signal, its real-time power is verified. If the real-time power is negative, it means that there may be temporary power transfer on the line that day, and the set of switches corresponding to the terminal does not participate in the algorithm judgment.

[0010] In step S3, the whitelist refers to terminals that have been manually verified on site to have no abnormal wiring and can be included in the whitelist to ensure that the terminals can continue to send signals.

[0011] In step S3, the topology check means that there is no change on the power supply side of the terminal, that is, there is no temporary power transfer on the line that day.

[0012] In step S3, filtering the grounding alarm signal means filtering the grounding alarm signal of the abnormal terminal through comprehensive zero-point power inspection, whitelist management, and real-time verification, so that this part of the alarm signal does not participate in the analysis and judgment.

[0013] In step S1, the power data of the complete set of switches is automatically inspected at zero o'clock every day through the zero-point power inspection link of the optimization strategy, so as to discover the phenomenon that the power of the complete set of switches is negative, and further discover the abnormal wiring problem on site. The abnormal wiring problem is that when the complete set of switches is installed in reverse or the wiring is abnormal, the direction or size of the current and power changes, and the active power becomes negative.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1) Improve the timeliness of abnormal wiring fault elimination of complete sets of switches: By optimizing the zero-point power inspection link of the strategy, the power data of the complete sets of switches is automatically inspected at zero o'clock every day. It can be found that the power of the complete sets of switches is negative. Further, it is found that there are suspected abnormal wiring problems such as reverse installation of the complete sets of switches on site (when the complete sets of switches are installed in reverse or the wiring is abnormal, the direction or size of the current and power will change, and the active power will become negative). Defect tickets are promptly initiated to guide the operation and maintenance personnel to carry out the operation and maintenance of the complete sets of switches in an orderly manner.

[0015] 2) Improve the accuracy of the grounding alarm signal of the complete switch: During the ground loss judgment process, the grounding alarm signal of the abnormal complete switch terminal is shielded to prevent the false alarm of the complete switch from sending the wrong grounding alarm signal to interfere with the single-phase grounding fault judgment, thereby improving the accuracy of the grounding alarm signal of the complete switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments: Attached Figure 1 It is a schematic diagram of a complete set of switch line selection algorithm optimization strategy flow chart of an embodiment of the present invention; Attached Figure 2 It is a schematic diagram of the zero-point power inspection process in the optimization strategy of an embodiment of the present invention. DETAILED DESCRIPTION

[0017] As shown in the figure, a complete set switch line selection algorithm optimization method based on power positive and negative characteristics analysis, in the ground loss judgment analysis, the optimization method uses the algorithm to judge and analyze the positive and negative characteristics of the power of the complete set switch, and shields the ground alarm signal of the terminal to which the complete set switch with abnormal measurement belongs, so as to improve the accuracy of the ground alarm signal of the complete set switch, including the following steps; Step S1: Zero-point power inspection, inspecting whether the power of the complete set of switches has ever been negative within a preset period of time; Step S2: If the power of the complete switch in the past preset period of time is positive and the real-time power check is positive, the algorithm is used for judgment, otherwise the grounding alarm signal is filtered; Step S3: If the power of the complete switch has been negative within a preset period of time, but the switch is in the whitelist and has passed the topological logic check, it still participates in the algorithm analysis, otherwise, its grounding alarm signal is filtered.

[0018] The preset duration is one day.

[0019] Step S1 specifically includes the following steps: Step S1-1: After inspection, check whether the power of the complete set of switches in the past day is positive; Step S1-2: If the power has been positive for the past day, it is determined that there is no abnormality in the switch terminal set; Step S1-3: If the power has a negative value in the past day, it is suspected that the terminal is abnormal, and the operation and maintenance personnel are sent to the site to verify the wiring of the complete switch; Step S1-4: If there is an abnormality in the wiring, a defect ticket is initiated to guide the operation and maintenance organization to carry out on-site defect elimination work; Step S1-5: If there is no abnormality in the wiring, and the short-term power of the switch is negative only due to temporary factors such as temporary power transfer or distributed power supply, the switch is included in the whitelist In step S1, the zero-point power inspection is specifically as follows: a complete set of equipment connection inspection module is added to the power distribution main station. The inspection module automatically inspects the power data of the complete set of switches at zero o'clock every day to check for abnormal wiring status of the complete set of switches. After on-site verification, if the wiring is abnormal, the fault elimination process is initiated in time and the on-site fault elimination is completed. Otherwise, the complete set of switches is included in the whitelist.

[0020] The operation and maintenance organization in step S1-4 is a local municipal company.

[0021] The real-time power verification is specifically as follows: for the terminal that sends the ground alarm signal, its real-time power is verified. If the real-time power is negative, it means that there may be temporary power transfer on the line that day, and the set of switches corresponding to the terminal does not participate in the algorithm judgment.

[0022] In step S3, the whitelist refers to terminals that have been manually verified on site to have no abnormal wiring and can be included in the whitelist to ensure that the terminals can continue to send signals.

[0023] In step S3, the topology check means that there is no change on the power supply side of the terminal, that is, there is no temporary power transfer on the line that day.

[0024] In step S3, filtering the grounding alarm signal means filtering the grounding alarm signal of the abnormal terminal through comprehensive zero-point power inspection, whitelist management, and real-time verification, so that this part of the alarm signal does not participate in the analysis and judgment.

[0025] In step S1, the power data of the complete set of switches is automatically inspected at zero o'clock every day through the zero-point power inspection link of the optimization strategy, so as to discover the phenomenon that the power of the complete set of switches is negative, and further discover the abnormal wiring problem on site. The abnormal wiring problem is that when the complete set of switches is installed in reverse or the wiring is abnormal, the direction or size of the current and power changes, and the active power becomes negative.

[0026] Example: This example provides an optimization strategy for the complete switch line selection algorithm based on the analysis of power positive and negative characteristics. The strategy can effectively shield the false alarm of the complete switch terminal small current grounding alarm signal, which is beneficial to improving the accuracy of the complete switch line selection algorithm.

[0027] To achieve the above purpose, Figure 1 As shown, this example provides an optimization strategy for the complete switch line selection algorithm based on the analysis of positive and negative power characteristics. This strategy aims at the phenomenon of false alarms and missed alarms of the complete switch grounding alarm signal. In the ground loss judgment analysis, by analyzing the positive and negative power characteristics of the complete switch, the abnormal complete switch terminal grounding alarm signal is selectively shielded and measured, thereby improving the accuracy of the complete switch line selection algorithm. Specifically, the following steps are included: Step S1: Zero-point power inspection, inspect whether the power of the complete set of switches has been negative in the past day. The specific flow chart of zero-point power inspection is as follows: Figure 2 As shown; Step S1-1: Check whether the power of the complete set of switches has been positive for the past day; Step S1-2: If the power has been positive for the past day, it is determined that there is no abnormality in the switch terminal set; Step S1-3: If the power has a negative value in the past day, it is suspected that the terminal is abnormal, and the operation and maintenance personnel are sent to the site to verify the wiring of the complete switch; Step S1-4: If there is an abnormality in the wiring, a defect ticket is issued to guide the local company to carry out on-site defect elimination work; Step S1-5: If there is no abnormality in the wiring, and the short-term power of the complete switch is negative only due to temporary factors such as temporary power transfer or distributed power supply, the complete switch is included in the whitelist; Furthermore, the zero-point power inspection adds a complete set of equipment connection reverse inspection module at the power distribution main station. The inspection module automatically inspects the power data of the complete set of switches at zero o'clock every day, which can effectively check the abnormal wiring status of the complete set of switches. After on-site verification, if the wiring is abnormal, the fault elimination process is initiated in time and the on-site fault elimination is completed. Otherwise, the complete set of switches is included in the whitelist.

[0028] Step S2: If the power of the complete switch was positive the day before and the real-time power check is positive, it participates in the algorithm analysis, otherwise it filters its grounding alarm signal; Furthermore, the real-time power verification refers to verifying the real-time power of the terminal that sends the ground alarm signal. If the real-time power is negative, it means that there may be temporary power transfer on the line that day, and the terminal does not participate in the algorithm judgment.

[0029] Step S3: If the power of the complete switch has a negative value the day before, but the switch is in the whitelist and has passed the topology logic check, then it still participates in the algorithm analysis, otherwise, its grounding alarm signal is filtered.

[0030] Furthermore, the whitelist refers to terminals that have been manually verified on site to have no abnormal wiring and can be included in the whitelist to ensure that the terminals can continue to send signals.

[0031] Furthermore, the topology check means that there is no change on the power supply side of the terminal, that is, there is no temporary power transfer on the line that day.

[0032] Furthermore, filtering the grounding alarm signal means filtering the grounding alarm signal of the abnormal terminal through comprehensive zero-point power inspection, whitelist management, and real-time verification without participating in the analysis and judgment.

Claims

1. A complete set of switch line selection algorithm optimization method based on power positive and negative characteristics analysis, characterized by: In the ground loss judgment and analysis, the optimization method judges and analyzes the positive and negative characteristics of the power of the complete set of switches through an algorithm, and shields the ground alarm signal of the terminal to which the complete set of switches with abnormal measurement belongs, so as to improve the accuracy of the ground alarm signal of the complete set of switches, including the following steps: Step S1: Zero-point power inspection, inspecting whether the power of the complete set of switches has ever been negative within a preset period of time; Step S2: If the power of the complete switch in the past preset period of time is positive and the real-time power check is positive, the algorithm is used for judgment, otherwise the grounding alarm signal is filtered; Step S3: If the power of the complete switch has been negative within a preset period of time, but the switch is in the whitelist and has passed the topological logic check, it still participates in the algorithm analysis, otherwise, its grounding alarm signal is filtered.

2. According to claim 1, a complete set of switch line selection algorithm optimization method based on power positive and negative characteristics analysis is characterized by: The preset duration is one day.

3. The method for optimizing a complete set of switch line selection algorithms based on analysis of positive and negative power characteristics according to claim 2, characterized in that: Step S1 specifically The steps include: Step S1-1: After inspection, check whether the power of the complete set of switches in the past day is positive; Step S1-2: If the power has been positive for the past day, it is determined that there is no abnormality in the switch terminal set; Step S1-3: If the power has a negative value in the past day, it is suspected that the terminal is abnormal, and the operation and maintenance personnel are sent to the site to verify the wiring of the complete switch; Step S1-4: If there is an abnormality in the wiring, a defect ticket is initiated to guide the operation and maintenance organization to carry out on-site defect elimination work; Step S1-5: If there is no abnormality in the wiring, and the short-term power of the complete switch is negative only due to temporary factors such as temporary power transfer or distributed power supply, the complete switch is included in the whitelist.

4. The method for optimizing a complete set of switch line selection algorithms based on analysis of positive and negative power characteristics according to claim 3 is characterized in that: In step S1, the zero-point power inspection is specifically as follows: a complete set of equipment connection inspection module is added to the power distribution main station. The inspection module automatically inspects the power data of the complete set of switches at zero o'clock every day to check for abnormal wiring status of the complete set of switches. After on-site verification, if the wiring is abnormal, the fault elimination process is initiated in time and the on-site fault elimination is completed. Otherwise, the complete set of switches is included in the whitelist.

5. The method for optimizing a complete set of switch line selection algorithms based on analysis of positive and negative power characteristics according to claim 4, characterized in that: The operation and maintenance organization in step S1-4 is a local municipal company.

6. The method for optimizing a complete set of switch line selection algorithms based on analysis of positive and negative power characteristics according to claim 1, characterized in that: The real-time power verification is specifically as follows: for the terminal that sends the ground alarm signal, its real-time power is verified. If the real-time power is negative, it means that there may be temporary power transfer on the line that day, and the set of switches corresponding to the terminal does not participate in the algorithm judgment.

7. The method for optimizing a complete set of switch line selection algorithms based on analysis of positive and negative power characteristics according to claim 1, characterized in that: In step S3, the whitelist refers to terminals that have been manually verified on site to have no abnormal wiring and can be included in the whitelist to ensure that the terminals can continue to send signals.

8. The method for optimizing a complete set of switch line selection algorithms based on analysis of positive and negative power characteristics according to claim 1, characterized in that: In step S3, the topology check means that there is no change on the power supply side of the terminal, that is, there is no temporary power transfer on the line that day.

9. The method for optimizing a complete set of switch line selection algorithms based on analysis of positive and negative power characteristics according to claim 1, characterized in that: In step S3, filtering the grounding alarm signal means filtering the grounding alarm signal of the abnormal terminal through comprehensive zero-point power inspection, whitelist management, and real-time verification, so that this part of the alarm signal does not participate in the analysis and judgment.

10. The method for optimizing a complete set of switch line selection algorithms based on analysis of positive and negative power characteristics according to claim 1, characterized in that: In step S1, the power data of the complete set of switches is automatically inspected at zero o'clock every day through the zero-point power inspection link of the optimization strategy, so as to discover the phenomenon that the power of the complete set of switches is negative, and further discover the abnormal wiring problem on site. The abnormal wiring problem is that when the complete set of switches is installed in reverse or the wiring is abnormal, the direction or size of the current and power changes, and the active power becomes negative.

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