Power distribution control method and power distribution control system

Abstract

The present invention discloses a power distribution control method and a power distribution control system, which relates to the field of power distribution control technology, and solves the problem that the unclear cause of voltage fluctuation leads to inaccurate post-processing, which causes abnormalities in the power distribution process and thus affects the power distribution effect. The present invention monitors the voltage values ​​of substations, transmission lines and power consumption areas, and performs fluctuation analysis based on the specific results of the monitoring. Based on the corresponding fluctuation analysis results and the situations before and after the fluctuation time point, it is identified whether the substation is abnormal or the transmission line is abnormal. Subsequently, different analysis and response processes are performed for different abnormal situations. In the process of analyzing the transmission line, it is necessary to fully consider whether it is interfered by external electromagnetic signals, and generate and display corresponding processing signals, so that external personnel can understand the abnormal situation in time and take corresponding power distribution control measures in time.

Description

Technical Field

[0001] The present invention relates to the technical field of power distribution control, and in particular to a power distribution control method and a power distribution control system. Background Art

[0002] Power distribution is the link in the power system that is directly connected to users and distributes electric energy to users. The power distribution system consists of distribution substations, high-voltage distribution lines, distribution transformers, low-voltage distribution lines and corresponding control and protection equipment.

[0003] The application with publication number CN115377975B discloses a power distribution control method and a power distribution control system. The power distribution control method includes: within a preset monitoring time period, using a collection device to collect the total power consumption of all distribution areas corresponding to the distribution center within the monitoring time period; setting the number of time monitoring stages and the corresponding duration of the time monitoring stages within the unit time period corresponding to each distribution area according to the total power consumption; setting the power monitoring value corresponding to each time monitoring stage of the distribution area according to the total power consumption and the number of time monitoring stages within the unit time period corresponding to each distribution area; real-time collection of the actual power consumption corresponding to each time monitoring stage of each distribution area within the unit time period, comparing the actual power consumption with the power monitoring value, and judging whether to adjust the power allocation according to the comparison result. This method realizes the allocation of power consumption in the remaining time within the unit time period, and prevents the failure to timely adjust the power consumption within the current unit time period.

[0004] When performing power distribution control, timely power distribution is generally carried out based on the power consumption of the corresponding area or line. However, in the real-time power distribution process, the power distribution cannot achieve a good processing effect. During the power distribution control process, due to abnormal reasons of the corresponding line or substation, the line fluctuates, which triggers the power distribution control. Since the cause of the voltage fluctuation is not clear, the subsequent processing is not accurate enough, which will cause abnormalities in the power distribution process and affect the power distribution effect. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a power distribution control method and a power distribution control system, which solves the problem that the unclear cause of voltage fluctuation leads to inaccurate post-processing, causing abnormalities in the power distribution process and thus affecting the power distribution effect.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A power distribution control system, comprising:

[0007] The value monitoring terminal monitors the voltage values ​​of different transmission lines, substations and power consumption areas, and transmits the monitored different voltage values ​​to different processing terminals;

[0008] The preliminary analysis end analyzes the voltage value of the monitored transmission line to determine whether the voltage value fluctuation inside the transmission line is normal. Based on the determination result, the abnormal line is determined. The specific method is as follows:

[0009] Based on the voltage value monitored at the current moment, determine the difference between the voltage value at the next moment and the current moment, and the difference is greater than 0. If the difference is greater than Y1, determine the monitoring period T1, where Y1 and T1 are both preset values, and T1 is 5 minutes. If the difference is ≤ Y1, continue monitoring;

[0010] Determine the number of times CS in which the difference between the next moment and the previous moment is greater than Y1 in the monitoring cycle T1. If CS is ≥ 8 in the monitoring cycle T1, then the transmission line is marked as an abnormal line. Otherwise, continue to monitor the voltage.

[0011] The abnormal object determination end determines the substation connected to the abnormal line based on the marked abnormal line, and analyzes the monitored voltage value of the substation to determine whether the abnormality is caused by the substation or the transmission line itself. The specific method is as follows:

[0012] Based on the monitoring period T1 determined by the abnormal line, determine the initial time of the monitoring period T1 and mark it as SS1;

[0013] Based on the current moment in the abnormal line determination process, starting from the current moment, determine the voltage value monitored by the corresponding substation at the subsequent moment, and determine the difference Cz before and after the corresponding substation in turn, analyze whether the difference Cz is greater than Y1 and determine the monitoring period T2, otherwise continue monitoring, where T1=T2, if the number of times SC that the difference between the next moment and the previous moment of this substation in this monitoring period T2 is greater than Y1 is greater than 8, then directly determine the initial moment of this monitoring period T2 and mark it as SS2, otherwise continue monitoring;

[0014] If SS1≥SS2 or no abnormality occurs in the substation between the current time and SS1, the transmission line parameter analysis terminal is directly executed;

[0015] If SS1<SS2, directly execute the substation parameter analysis terminal;

[0016] The substation parameter analysis terminal re-determines the monitoring cycle, monitors the voltage parameters of the power consumption area interconnected by the substation through the numerical monitoring terminal, and determines the voltage range of the power consumption area based on the specific monitored values. Then, a coincidence analysis is performed on several power consumption areas. Based on the analysis results, it is determined whether there is any voltage regulation abnormality in the substation. The specific method is as follows:

[0017] Define a set of monitoring periods T3, monitor the voltage parameters of different power consumption areas within this monitoring period T3, and determine the minimum and maximum values ​​of the voltage parameters of the power consumption areas, so as to determine the voltage range F of the power consumption areas k , where k = 1, 2, ..., n, where n represents the number of different power consumption areas controlled by this substation;

[0018] The voltage range F of several groups of different power consumption areas k Perform a pairwise overlap analysis to determine the overlap range and make sure that this range is within the voltage range F of the corresponding application area. k The proportion of the two groups of proportions is averaged to determine the voltage range F of the two different power consumption areas. k The coincidence parameter of

[0019] Then, the generated groups of coincidence degree parameters are processed by averaging to determine the mean value Jz to be verified, and whether the mean value Jz to be verified satisfies: Jz ≥ Y2, where Y2 is a preset value. If it satisfies, no processing is performed. If it does not satisfy, a substation abnormality signal is directly generated and displayed directly;

[0020] The transmission line parameter analysis end, based on the monitoring period T1 determined by the abnormal line, extracts the frequency value of the abnormal line in the monitoring period T1 through the specific value monitored by the numerical monitoring end, and determines the change trend of its frequency value according to its specific time trend, and determines whether its change trend is abnormal, so as to determine whether the abnormal line is line aging or external interference. The specific method is as follows:

[0021] Based on the changing trend of the frequency value during the monitoring period T1, determine the changing trend curve;

[0022] Then determine the slopes of several line segments in the change trend curve, the line segment slopes are determined by the values ​​of the front and rear endpoints of the corresponding line segment, and determine the minimum and maximum values ​​from the slopes of several line segments to generate the slope interval of the change trend curve;

[0023] Determine whether the slope interval belongs to the preset standard interval. If the slope interval∈standard interval, it means that there is no signal interference problem in this abnormal line, or the signal interference is not serious enough to cause the corresponding voltage fluctuation, then generate and display the line aging signal;

[0024] If the slope interval ∉ the standard interval, it means that there is a signal interference problem on this abnormal line, and an external interference signal is generated and displayed.

[0025] Preferably, the voltage value of the transmission line is transmitted to the preliminary analysis terminal, and the voltage values ​​of the transmission line and the substation are transmitted to the abnormal object determination terminal, wherein the voltage values ​​of different power consumption areas are transmitted to the substation parameter analysis terminal, and the transmission line parameter analysis terminal receives the voltage value of the transmission line, and at the same time monitors the frequency value of the corresponding designated transmission line through the value monitoring terminal.

[0026] Preferably, a power distribution control method comprises the following steps:

[0027] Monitor the voltage values ​​of transmission lines, substations and power consumption areas, analyze the voltage values ​​of the monitored transmission lines, determine whether the voltage value fluctuations within the transmission lines are normal, and determine abnormal lines based on the determination results;

[0028] Based on the calibrated abnormal line, determine the substation connected to the abnormal line, and analyze the monitored voltage value of the substation to determine whether the abnormality is caused by the substation or the transmission line itself;

[0029] In case of abnormal substation parameters, the monitoring cycle is re-determined, and the voltage parameters of the power consumption area interconnected by the substation are monitored through the numerical monitoring terminal. Based on the specific monitored values, the voltage range of the power consumption area is determined, and then a coincidence analysis is performed on several power consumption areas. Based on the analysis results, it is determined whether there is abnormal voltage regulation in the substation, and a substation abnormality signal is generated for display;

[0030] For the abnormality of the transmission line, based on the monitoring period T1 determined by the abnormal line, the frequency value of the abnormal line in the monitoring period T1 is extracted through the specific value monitored by the numerical monitoring end, and the changing trend of the frequency value is determined according to the specific direction of time, and it is determined whether the changing trend is abnormal.

[0031] The present invention provides a power distribution control method and a power distribution control system. Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present invention monitors the voltage values ​​of substations, transmission lines and power consumption areas, and performs fluctuation analysis based on the specific monitoring results. Based on the corresponding fluctuation analysis results and the situation before and after the fluctuation time point, it identifies whether the substation is abnormal or the transmission line is abnormal. Subsequently, different analysis and response processes are made for different abnormal situations.

[0033] In the process of analyzing the transmission line, it is necessary to fully consider whether it is interfered by external electromagnetic signals, and generate and display corresponding processing signals, so that external personnel can understand the abnormal situation in time and take corresponding distribution control measures in time;

[0034] During the analysis of the substation, the range of voltage values ​​for the power consumption in its control area is determined. Based on the range, it is judged whether the voltage values ​​of some power consumption areas will be too low or too high when the substation is performing power regulation. In this way, it is determined whether there are any abnormal power transformation conditions during the use of the substation. The values ​​can be comprehensively monitored with a wide coverage and high recognition, and the results can be obtained quickly, which is convenient for subsequent operators to perform power distribution control. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the principle framework of the present invention;

[0036] Figure 2 It is a plane schematic diagram of the power transmission line of the present invention. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Embodiment 1

[0039] See also Figure 1 as well as Figure 2 , the present application provides a power distribution control system, including a numerical monitoring terminal, a preliminary analysis terminal, an abnormal object determination terminal, a substation parameter analysis terminal, a display terminal, and a transmission line parameter analysis terminal;

[0040] The numerical monitoring end is electrically connected to the input nodes of the preliminary analysis end, the abnormal object determination end, the substation parameter analysis end, and the transmission line parameter analysis end respectively, and the numerical monitoring end is electrically connected to the input node of the preliminary analysis end, and the preliminary analysis end is electrically connected to the input node of the abnormal object determination end, and the abnormal object determination end is electrically connected to the input nodes of the substation parameter analysis end and the transmission line parameter analysis end respectively, and the substation parameter analysis end and the transmission line parameter analysis end are both electrically connected to the input node of the display end;

[0041] Among them, the numerical monitoring end monitors the voltage values ​​of different transmission lines, substations and power consumption areas, and transmits the monitored different voltage values ​​to different processing terminals, wherein the voltage value of the transmission line is transmitted to the preliminary analysis end, and the voltage values ​​of the transmission line and substation are transmitted to the abnormal object determination end, wherein the voltage values ​​of different power consumption areas are transmitted to the substation parameter analysis end, and the transmission line parameter analysis end receives the voltage value of the transmission line, and at the same time monitors the frequency value of the corresponding designated transmission line through the numerical monitoring end. Specifically, under normal circumstances, the power frequency of the transmission line is 50hz. If it is interfered by external electromagnetic signals, its power frequency will fluctuate;

[0042] The preliminary analysis end analyzes the voltage value of the monitored transmission line to determine whether the voltage value fluctuation inside the transmission line is normal. Based on the determination result, the abnormal line is determined. The specific determination method is as follows:

[0043] Based on the voltage value monitored at the current moment, determine the difference between the voltage value at the next moment and the current moment, and the difference is greater than 0. If the difference is greater than Y1, determine the monitoring period T1, where Y1 and T1 are both preset values, and T1 is 5 minutes. If the difference is ≤ Y1, continue monitoring;

[0044] Determine the number of times CS in which the difference between the next moment and the previous moment is greater than Y1 in the monitoring cycle T1 (the difference before the determination of the monitoring cycle T1 is not included). If CS is ≥ 8 in the monitoring cycle T1, then the transmission line is marked as an abnormal line. Otherwise, continue to monitor the voltage.

[0045] Specifically, when the voltage value generated by a transmission line at a certain moment is S1, and the voltage value generated at the next moment (that is, the next second or the next minute, the moment is determined by the operator) is S2, and |S2-S1|>Y1, then the corresponding monitoring period T1 is determined, and the number of differences greater than Y1 generated within this monitoring period T1 (that is, the number of times) is recorded. When the number CS≥8, the corresponding transmission line can be marked as an abnormal line. The principle for determining an abnormal line is the fluctuation situation. When the number of fluctuations is too many, the transmission line is the abnormal line that needs to be determined in this application.

[0046] The abnormal object determination end determines the substation interconnected by the abnormal line based on the marked abnormal line, and analyzes the monitored voltage value of the substation to determine whether the abnormality is caused by the substation or the transmission line itself. The specific method of performing the analysis is as follows:

[0047] Based on the monitoring period T1 determined by the abnormal line, determine the initial time of the monitoring period T1 and mark it as SS1;

[0048] Based on the current moment in the abnormal line determination process, starting from the current moment, determine the voltage value monitored by the corresponding substation at the subsequent moment, and determine the difference Cz before and after the corresponding substation in turn, analyze whether the difference Cz is greater than Y1 and determine the monitoring period T2, otherwise continue monitoring, where T1=T2, if the number of times SC that the difference between the next moment and the previous moment of this substation in this monitoring period T2 is greater than Y1 is greater than 8, then directly determine the initial moment of this monitoring period T2 and mark it as SS2, otherwise continue monitoring;

[0049] If SS1≥SS2 or there is no abnormality in the substation between the current time and SS1, it means that there is a problem with the transmission line. Since the problem of the transmission line causes the problem of the substation, the voltage of the substation is also abnormal, and the transmission line parameter analysis terminal is directly executed;

[0050] If SS1<SS2, it means that the substation is abnormal and its abnormal time is before the transmission line. Then it is the abnormality of the substation that causes the abnormal voltage fluctuation of the transmission line. The substation parameter analysis terminal is directly executed;

[0051] When voltage fluctuation occurs in the transmission line, due to the interconnection between the transmission line and the substation, such as Figure 2 As shown, based on the interconnected substations, the substations regulate the power consumption and power voltage of the power consumption area. In the specific regulation process, if the voltage of the substation itself fluctuates violently, it will cause the transmission line to fluctuate. The time of the substation fluctuation must be before the time of the transmission line fluctuation, which means that the entire voltage fluctuation is caused by the substation. Therefore, it is necessary to execute the corresponding substation parameter analysis terminal to perform parameter analysis;

[0052] Secondly, if the voltage of the transmission line itself fluctuates, and its substation has the function of substation, it may not have any voltage fluctuations itself, or it may be affected by the transmission line, causing voltage fluctuations, resulting in fluctuations in the substation. In this case, the fluctuation time of the substation must be behind the transmission line, or there is no fluctuation in the substation itself, and its specific fluctuations are all caused by the corresponding transmission line. In this case, it is necessary to perform numerical analysis on the specified object to determine the specific causes and problems and control them.

[0053] As a further embodiment of the present application, the following part mainly performs numerical analysis on the power consumption area monitored by the substation to determine whether the voltage difference between multiple different power consumption areas causes the substation to have a drastic fluctuation, and generates a corresponding processing control signal for display to warn external operators;

[0054] Among them, the substation parameter analysis end re-determines the monitoring cycle, monitors the voltage parameters of the power consumption area interconnected by the substation through the numerical monitoring end, and determines the voltage range of its power consumption area based on the specific monitored values, and then performs coincidence analysis on several power consumption areas. Based on the analysis results, it is determined whether there is voltage regulation abnormality in the substation, and a substation abnormality signal is generated for display. Among them, the specific method of performing coincidence analysis is:

[0055] A set of monitoring period T3 is defined, and the time line of T3 is located after T1 and T2. T3 is a preset value, and its specific value is based on the operator's own formulation. The voltage parameters of different power consumption areas in this monitoring period T3 are monitored, and the minimum and maximum values ​​of the voltage parameters of the power consumption areas are determined, so as to determine the voltage range F of the power consumption areas. k , where k = 1, 2, ..., n, where n represents the number of different power consumption areas controlled by this substation;

[0056] The voltage range F of several groups of different power consumption areas k Perform a pairwise overlap analysis to determine the overlap range and make sure that this range is within the voltage range F of the corresponding application area. k The proportion of the two groups of proportions is averaged to determine the voltage range F of the two different power consumption areas. k For example, assuming that the voltage ranges of two different power consumption areas are [212V, 223V] and [210V, 225V], then the overlap value range generated by the two is [212V, 223V]. The voltage range of the first power consumption area is 100% (that is, the proportion of the first group), and the voltage range of the second power consumption area is 11 / 15, that is, 73.3%. Then the overlap parameter determined by the two is (100% + 73.3%) ÷ 2 = 86.6%, accurate to one decimal place;

[0057] Then, the generated groups of coincidence degree parameters are processed by averaging to determine the mean value Jz to be verified, and whether the mean value Jz to be verified satisfies: Jz ≥ Y2, where Y2 is a preset value, and its specific value is determined by the operator based on experience. If it satisfies, no processing is performed. It may be due to a certain voltage or power fluctuation that causes voltage fluctuation in the transformer. In fact, there is no problem with the corresponding transformer substation. If it does not satisfy, a transformer abnormality signal is directly generated and displayed directly for external operators to view, take timely countermeasures, and regulate electricity consumption in a timely manner to ensure that several different power consumption areas can use electricity normally without causing voltage fluctuations in the substation.

[0058] Specifically, in order to directly identify whether there are any abnormalities in the power substation, it is necessary to determine the range of voltage values ​​for power consumption in the control area. Based on the range, it is determined whether the substation will cause the voltage values ​​in certain power consumption areas to be too low or too high when performing power regulation. In this way, it is determined whether there are any abnormalities in the power substation during use. The values ​​can be comprehensively monitored with a wide coverage, high recognition, and quick results.

[0059] Among them, the problem of transmission lines is that either the transmission lines themselves are aging, causing their voltage to fluctuate, or their power frequency is interfered by external electromagnetic signals, causing their voltage to fluctuate;

[0060] The transmission line parameter analysis end, based on the monitoring period T1 determined by the abnormal line, extracts the frequency value of the abnormal line in the monitoring period T1 through the specific value monitored by the numerical monitoring end, and determines the change trend of the frequency value according to its specific time trend, and determines whether its change trend is abnormal (by directly analyzing the change of its change trend, it can directly determine the change of its frequency in a short time. If the change is drastic, it is likely that the interference of external signals causes a strong change in its frequency, thereby causing its frequency to become unstable), to determine whether this abnormal line is line aging or external interference, wherein the specific method of determination is:

[0061] Based on the changing trend of the frequency value during the monitoring period T1, determine the changing trend curve;

[0062] Then determine the slopes of several line segments in the trend curve. The slopes of the line segments are determined by the values ​​of the front and rear endpoints of the corresponding line segments. The minimum and maximum values ​​are determined from the slopes of several line segments to generate the slope interval of the trend curve. For example, if the trend curve is composed of m groups of line segments, the front and rear endpoints of the m groups of line segments can determine the horizontal coordinates and vertical coordinates in the corresponding coordinate axes. Based on the two endpoints A1 (X1, Y1) and A2 (X2, Y2), where A1 is located before A2, (Y2-Y1) ÷ (X2-X1) = slope is used to obtain the slope of the line segment between the two endpoints. The slopes of other line segments are also processed in the same way as this line segment.

[0063] Determine whether the slope interval belongs to the preset standard interval. If the slope interval∈standard interval, it means that there is no signal interference problem in this abnormal line, or the signal interference is not serious and is not enough to cause the corresponding voltage fluctuation. Then, a line aging signal is generated and displayed. For the line aging signal, the operator needs to use professional instruments to test the resistance or power transmission capacity of the abnormal line to determine whether the abnormal line is really aged and make timely adjustments.

[0064] If the slope interval ∉ the standard interval, it means that there is a signal interference problem in this abnormal line, and an external interference signal will be generated and displayed. To address the signal interference problem, the operator needs to adjust the power frequency of the transmission line and gradually lower or increase the power frequency during the adjustment process. The voltage fluctuation of the abnormal line should be recorded at all times to determine the optimal frequency of use and ensure that the transmission line will not be interfered with by external electromagnetic signals.

[0065] A power distribution control method comprises the following steps:

[0066] Monitor the voltage values ​​of transmission lines, substations and power consumption areas, analyze the voltage values ​​of the monitored transmission lines, determine whether the voltage value fluctuations within the transmission lines are normal, and determine abnormal lines based on the determination results;

[0067] Based on the calibrated abnormal line, determine the substation connected to the abnormal line, and analyze the monitored voltage value of the substation to determine whether the abnormality is caused by the substation or the transmission line itself;

[0068] In case of abnormal substation parameters, the monitoring cycle is re-determined, and the voltage parameters of the power consumption area interconnected by the substation are monitored through the numerical monitoring terminal. Based on the specific monitored values, the voltage range of the power consumption area is determined, and then a coincidence analysis is performed on several power consumption areas. Based on the analysis results, it is determined whether there is abnormal voltage regulation in the substation, and a substation abnormality signal is generated for display;

[0069] For the abnormality of the transmission line, based on the monitoring period T1 determined by the abnormal line, the frequency value of the abnormal line in the monitoring period T1 is extracted through the specific value monitored by the numerical monitoring end, and the changing trend of the frequency value is determined according to the specific direction of time, and it is determined whether the changing trend is abnormal.

[0070] Some of the data in the above formulas are numerically calculated by removing their dimensions. Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0071] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. A power distribution control system, characterized in that: include: The value monitoring terminal monitors the voltage values ​​of different transmission lines, substations and power consumption areas, and transmits the monitored different voltage values ​​to different processing terminals; The preliminary analysis end analyzes the voltage value of the monitored transmission line to determine whether the voltage value fluctuation inside the transmission line is normal. Based on the determination result, the abnormal line is determined. The specific method is as follows: Based on the voltage value monitored at the current moment, determine the difference between the voltage value at the next moment and the current moment, and the difference is greater than 0. If the difference is greater than Y1, determine the monitoring period T1, where Y1 and T1 are both preset values, and T1 is 5 minutes. If the difference is ≤ Y1, continue monitoring; Determine the number of times CS in which the difference between the next moment and the previous moment is greater than Y1 in the monitoring cycle T1. If CS is ≥ 8 in the monitoring cycle T1, then the transmission line is marked as an abnormal line. Otherwise, continue to monitor the voltage. The abnormal object determination end determines the substation connected to the abnormal line based on the marked abnormal line, and analyzes the monitored voltage value of the substation to determine whether the abnormality is caused by the substation or the transmission line itself. The specific method is as follows: Based on the monitoring period T1 determined by the abnormal line, determine the initial time of the monitoring period T1 and mark it as SS1; Based on the current moment in the abnormal line determination process, starting from the current moment, determine the voltage value monitored by the corresponding substation at the subsequent moment, and determine the difference Cz before and after the corresponding substation in turn, analyze whether the difference Cz is greater than Y1 and determine the monitoring period T2, otherwise continue monitoring, where T1=T2, if the number of times SC that the difference between the next moment and the previous moment of this substation in this monitoring period T2 is greater than Y1 is greater than 8, then directly determine the initial moment of this monitoring period T2 and mark it as SS2, otherwise continue monitoring; If SS1≥SS2 or no abnormality occurs in the substation between the current time and SS1, the transmission line parameter analysis terminal is directly executed; If SS1<SS2, directly execute the substation parameter analysis terminal; The substation parameter analysis terminal re-determines the monitoring cycle, monitors the voltage parameters of the power consumption area interconnected by the substation through the numerical monitoring terminal, and determines the voltage range of the power consumption area based on the specific monitored values. Then, a coincidence analysis is performed on several power consumption areas. Based on the analysis results, it is determined whether there is any voltage regulation abnormality in the substation, and a substation abnormality signal is generated for display; The transmission line parameter analysis end, based on the monitoring period T1 determined by the abnormal line, extracts the frequency value of the abnormal line in the monitoring period T1 through the specific value monitored by the numerical monitoring end, and determines the changing trend of its frequency value according to its specific time trend, and determines whether its changing trend is abnormal, so as to determine whether the abnormal line is line aging or external interference.

2. A power distribution control system according to claim 1, characterized in that: The voltage value of the transmission line is transmitted to the preliminary analysis terminal, and the voltage values ​​of the transmission line and the substation are transmitted to the abnormal object determination terminal, wherein the voltage values ​​of different power consumption areas are transmitted to the substation parameter analysis terminal, and the transmission line parameter analysis terminal receives the voltage value of the transmission line, and at the same time monitors the frequency value of the corresponding designated transmission line through the value monitoring terminal.

3. A power distribution control system according to claim 1, characterized in that: The specific method of the substation parameter analysis end for performing coincidence analysis on several power consumption areas is as follows: Define a set of monitoring periods T3, monitor the voltage parameters of different power consumption areas within this monitoring period T3, and determine the minimum and maximum values ​​of the voltage parameters of the power consumption areas, so as to determine the voltage range F of the power consumption areas k , where k = 1, 2, ..., n, where n represents the number of different power consumption areas controlled by this substation; The voltage range F of several groups of different power consumption areas k Perform a pairwise overlap analysis to determine the overlap range and make sure that this range is within the voltage range F of the corresponding application area. k The proportion of the two groups of proportions is averaged to determine the voltage range F of the two different power consumption areas. k The coincidence parameter of Then, the generated groups of coincidence degree parameters are averaged to determine the mean value Jz to be verified, and whether the mean value Jz to be verified satisfies: Jz≥Y2, where Y2 is a preset value. If it satisfies, no processing is performed. If it does not satisfy, a substation abnormality signal is directly generated and displayed directly.

4. A power distribution control system according to claim 1, characterized in that: The transmission line parameter analysis terminal determines whether the abnormal line is line aging or external interference in a specific manner as follows: Based on the changing trend of the frequency value during the monitoring period T1, determine the changing trend curve; Then determine the slopes of several line segments in the change trend curve, the line segment slopes are determined by the values ​​of the front and rear endpoints of the corresponding line segment, and determine the minimum and maximum values ​​from the slopes of several line segments to generate the slope interval of the change trend curve; Determine whether the slope interval belongs to the preset standard interval. If the slope interval∈standard interval, it means that there is no signal interference problem in this abnormal line, or the signal interference is not serious enough to cause the corresponding voltage fluctuation, then generate and display the line aging signal; If the slope interval ∉ the standard interval, it means that there is a signal interference problem on this abnormal line, and an external interference signal is generated and displayed.

5. A power distribution control method, which is applied to a power distribution control system according to any one of claims 1 to 4, characterized in that: The following steps are involved: Monitor the voltage values ​​of transmission lines, substations and power consumption areas, analyze the voltage values ​​of the monitored transmission lines, determine whether the voltage value fluctuations within the transmission lines are normal, and determine abnormal lines based on the determination results; Based on the calibrated abnormal line, determine the substation connected to the abnormal line, and analyze the monitored voltage value of the substation to determine whether the abnormality is caused by the substation or the transmission line itself; In case of abnormal substation parameters, the monitoring cycle is re-determined, and the voltage parameters of the power consumption area interconnected by the substation are monitored through the numerical monitoring terminal. Based on the specific monitored values, the voltage range of the power consumption area is determined, and then a coincidence analysis is performed on several power consumption areas. Based on the analysis results, it is determined whether there is abnormal voltage regulation in the substation, and a substation abnormality signal is generated for display; For the abnormality of the transmission line, based on the monitoring period T1 determined by the abnormal line, the frequency value of the abnormal line in the monitoring period T1 is extracted through the specific value monitored by the numerical monitoring end, and the changing trend of the frequency value is determined according to the specific direction of time, and it is determined whether the changing trend is abnormal.

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