Method and system for judging running state of high-voltage power distribution network

Abstract

The invention discloses a high-voltage power distribution network operation state determination method, which comprises the steps of performing grid division on a target high-voltage power distribution network according to a power distribution area to obtain a plurality of power distribution grids; acquiring data information of each power distribution grid in real time; and calculating to obtain a safety index, a reliability index, a high-quality index, an economic index and an adaptability index of the target high-voltage power distribution network, and performing judgment according to the obtained safety index, reliability index, high-quality index, economic index and adaptability index so as to complete operation state judgment of the target high-voltage power distribution network. The invention also discloses a system for realizing the method for judging the running state of the high-voltage power distribution network. According to the method, grid division is carried out on the target power distribution network, according to the divided grids, the operation state of the high-voltage power distribution network is judged from the five aspects of safety, reliability, high quality, economical efficiency and adaptability, the reliability is higher, and the accuracy is better.

Description

Technical Field

[0001] The present invention belongs to the field of electrical automation, and in particular relates to a method and system for determining the operating state of a high-voltage distribution network. Background Art

[0002] With the development of economy and technology and the improvement of people's living standards, electricity has become an indispensable secondary energy source in people's production and life, bringing endless convenience to people's production and life. Therefore, ensuring the stable and reliable supply of electricity has become one of the most important tasks of the power system.

[0003] The distribution network plays an important role in distributing electric energy in the power system. Therefore, the determination of the operating status of the distribution network is of great significance to the power system. At present, the existing high-voltage distribution network operating status determination scheme in the power system adopts a simple indicator determination scheme, generally including voltage overvoltage determination, current exceeding threshold determination and other schemes. Although such schemes are simple and feasible, their reliability and accuracy are poor, and they are no longer suitable for the refined management requirements of today's power system. Summary of the invention

[0004] One of the purposes of the present invention is to provide a method for determining the operating status of a high-voltage distribution network with high reliability and good accuracy.

[0005] A second objective of the present invention is to provide a system for implementing the method for determining the operating status of a high-voltage distribution network.

[0006] The method for determining the operating status of a high-voltage distribution network provided by the present invention comprises the following steps:

[0007] S1. Divide the target high-voltage distribution network into grids according to the distribution areas to obtain a number of distribution grids;

[0008] S2. According to the distribution grid obtained in step S1, real-time data information of each distribution grid is obtained;

[0009] S3. According to the data information obtained in step S2, the safety index, reliability index, quality index, economic index and adaptability index of the target high-voltage distribution network are calculated;

[0010] S4. Determine the safety index, reliability index, quality index, economic index and adaptability index obtained in step S3 to complete the operation status determination of the target high-voltage distribution network.

[0011] Step S1 of dividing the target high-voltage distribution network into grids according to the distribution areas to obtain a plurality of distribution grids specifically includes the following steps:

[0012] Divide the target high-voltage distribution network into several distribution grids according to the set requirements;

[0013] Among them, the setting requirements specifically include: according to the electricity demand and geographical location of each plot in the distribution area, a group or several groups of power supply areas with electrical connections and independent of other lines are divided into the same grid; the geographical boundaries of roads are used as boundaries between grids; the distribution grid includes a 110 kV substation, the distribution grid is geographically continuous, and meets the safe operation requirements of the high-voltage power grid; the safe operation requirements of the high-voltage power grid specifically include: the high-voltage distribution network within the distribution grid can still be self-sufficient and meet the power supply safety requirements after any component failure under normal operating conditions.

[0014] The safety indicator specifically includes the following steps:

[0015] The limited voltage value is calculated using the following formula:

[0016] u s =max 所有配电网格 (u i -u N |)

[0017] Where u s is the limiting voltage value; u i is the voltage of the ith node in the distribution grid; u N is the rated voltage of the distribution grid;

[0018] The limited load value is calculated using the following formula:

[0019]

[0020] Where I j is the current of the jth branch in the distribution grid; I jL is the maximum allowable current carrying capacity of the jth branch in the distribution grid;

[0021] The safety index determination value is calculated using the following formula:

[0022] AP = a 1 u s +a 2 K

[0023] Where AP is the security index judgment value; a 1 is the first weight of the safety index; a 2 It is the second weight of safety index;

[0024] Compare the obtained safety index judgment value with the set safety index range threshold:

[0025] If the safety index judgment value is within the safety index range threshold, the safety index is normal;

[0026] If the safety index judgment value is not within the safety index range threshold, the safety index is abnormal.

[0027] The reliability index specifically includes the following steps:

[0028] The switch failure rate is calculated using the following formula:

[0029] p c =p M +p E

[0030] Where p c is the switch failure rate; p M is the underreporting rate of switch failure; p E is the false alarm rate of switch failure;

[0031] The obtained switch failure rate is used as the reliability index judgment value, and the reliability index judgment value is compared with the set reliability index range threshold:

[0032] If the reliability index determination value is within the reliability index range threshold, the reliability index is determined to be normal;

[0033] If the reliability index determination value is not within the reliability index range threshold, the reliability index is determined to be abnormal.

[0034] The quality index specifically includes the following steps:

[0035] The three-phase unbalance rate is calculated using the following formula:

[0036]

[0037] Where ε j is the three-phase unbalance rate; I jmax is the maximum value of the three-phase current of the jth line; I jmin is the minimum value of the three-phase current of the jth line;

[0038] The following rules are used to obtain the three-phase unbalance rate determination value:

[0039] If ε j >10%, the three-phase unbalance rate judgment value is 0;

[0040] If 5%<ε j ≤10%, the three-phase unbalance rate judgment value is 20;

[0041] If 0%<ε j ≤5%, the three-phase unbalance rate judgment value is 50;

[0042] If ε j =0, the three-phase unbalance rate judgment value is 0;

[0043] The three-phase unbalance is calculated using the following formula:

[0044]

[0045] Where ε is the three-phase unbalance; N is the total number of three-phase lines;

[0046] The following rules are used to obtain the three-phase unbalance determination value:

[0047] If ε>10%, the three-phase unbalance determination value is 0;

[0048] If 5%<ε≤10%, the three-phase unbalance determination value is 20;

[0049] If 0%<ε≤5%, the three-phase unbalance determination value is 50;

[0050] If ε=0, the three-phase unbalance determination value is 0;

[0051] The power factor determination value is calculated using the following formula:

[0052]

[0053] Where η is the power factor judgment value; is the power factor of the ith node; P i is the active power of the ith node; Q i is the reactive power of the i-th node;

[0054] The voltage drop percentage is calculated using the following formula:

[0055]

[0056] Where U down is the voltage drop percentage; U js is the voltage at the head end of the jth line; U je is the terminal voltage of the jth line;

[0057] The voltage drop percentage determination value is obtained using the following rule:

[0058] If max(U down )>4%, the voltage drop percentage determination value is 0;

[0059] If 2%<max(U down )≤4%, the voltage drop percentage determination value is 25;

[0060] If 0%<max(U down )≤2%, the voltage drop percentage determination value is 50;

[0061] If max(U down )=0, the voltage drop percentage judgment value is 0;

[0062] The voltage offset rate is calculated using the following formula:

[0063]

[0064] Where U shift is the voltage deviation rate; U jshifts is the voltage deviation rate at the first end, and U js is the voltage at the head end of the jth line, U jN is the rated voltage of the jth line; U jshifte is the terminal voltage deviation rate, and U je is the terminal voltage of the jth line;

[0065] The voltage offset rate determination value is obtained using the following rule:

[0066] If max(U shift )>4%, the voltage deviation rate judgment value is 0;

[0067] If 2%<max(U shift )≤4%, then the voltage deviation rate judgment value is 25;

[0068] If 0%<max(U shift )≤2%, the voltage deviation rate judgment value is 50;

[0069] If max(U shift )=0, the voltage deviation rate judgment value is 100;

[0070] The voltage qualification rate is calculated using the following formula:

[0071]

[0072] Where U st is the voltage qualification rate; Num(U sti ) is the total number of nodes with qualified voltage; I is the total number of nodes;

[0073] The voltage qualification rate determination value is obtained using the following rules:

[0074] If 0≤U st <50%, the voltage qualification rate is 20;

[0075] If 50%≤U st<100%, the voltage qualification rate judgment value is 70;

[0076] If U st =100%, then the voltage qualification rate judgment value is 100;

[0077] The quality index judgment value is calculated using the following formula:

[0078] YP=c 1 ε j1 +c 2 ε 1 +c 3 η+c 4 U down1 +c 5 U shift1 +c 6 U st1

[0079] Where YP 1 is the first judgment value of the quality index; c 1 is the first weight of the quality index; j1 is the three-phase unbalance rate judgment value; c 2 is the second weight of the quality index; 1 is the three-phase unbalance determination value; c 3 The third weight of the quality index; c 4 It is the fourth weight of quality index; U down1 is the voltage drop percentage judgment value; c 5 It is the fifth weight of quality index; U shift1 is the voltage deviation rate judgment value; c 6 It is the sixth weight of quality index; U st1 is the voltage qualification rate judgment value;

[0080] Compare the obtained quality index judgment value with the set quality index range threshold:

[0081] If the quality index judgment value is within the quality index range threshold, the quality index is normal;

[0082] If the quality index judgment value is not within the quality index range threshold, the quality index is abnormal.

[0083] The economic indicators specifically include the following steps:

[0084] The network loss rate is calculated using the following formula:

[0085]

[0086] Where ΔA L is the network loss rate; ΔA∑ A is the total power loss of the circuit network; g The total power supply for the circuit network;

[0087] The obtained network loss rate is used as the economic index judgment value, and the economic index judgment value is compared with the set economic index range threshold:

[0088] If the economic index judgment value is within the economic index range threshold, the economic index is normal;

[0089] If the economic index judgment value is not within the economic index range threshold, the economic index is abnormal.

[0090] The adaptability index specifically includes the following steps:

[0091] The average connection capacity of the line section is calculated using the following formula:

[0092]

[0093] Where R is the average connection capacity of the line section; j is the power distribution capacity installed on the jth line; k j is the number of segments of the jth line; m 1 is the total number of lines;

[0094] The obtained average connection capacity of the line section is used as the adaptability index judgment value, and the adaptability index judgment value is compared with the set adaptability index range threshold:

[0095] If the adaptability index judgment value is within the adaptability index range threshold, the adaptability index is normal;

[0096] If the adaptability index judgment value is not within the adaptability index range threshold, the adaptability index is abnormal.

[0097] Step S4 of determining the safety index, reliability index, quality index, economic index and adaptability index obtained in step S3 specifically includes the following steps:

[0098] When the safety index is abnormal, the target high-voltage distribution network status is determined to be "urgent processing required";

[0099] When the reliability index is abnormal, the target high-voltage distribution network status is determined to be "abnormal pending inspection";

[0100] When the safety index, reliability index and quality index are all normal, the target high-voltage distribution network state is judged to be "normal operation";

[0101] When the economic index or the adaptability index is abnormal, the state of the target high-voltage distribution network is determined to be "to be optimized".

[0102] The present invention also provides a system for implementing the method for determining the operating status of a high-voltage distribution network, comprising a grid division module, a data acquisition module, an index calculation module and a status determination module; the grid division module, the data acquisition module, the index calculation module and the status determination module are connected in series in sequence; the grid division module is used to grid the target high-voltage distribution network according to the distribution area to obtain a plurality of distribution grids, and upload the data information to the data acquisition module; the data acquisition module is used to obtain the data information of each distribution grid in real time according to the received data information and the obtained distribution grid, and upload the data information to the index calculation module; the index calculation module is used to calculate the safety index, reliability index, quality index, economic index and adaptability index of the target high-voltage distribution network according to the received data information and the obtained data information, and upload the data information to the status determination module; the status determination module is used to determine the obtained safety index, reliability index, quality index, economic index and adaptability index according to the received data information, so as to complete the operating status determination of the target high-voltage distribution network.

[0103] The method and system for determining the operating status of a high-voltage distribution network provided by the present invention divides the target distribution network into grids and, based on the divided grids, determines the operating status of the high-voltage distribution network from five aspects, namely, safety, reliability, quality, economy and adaptability, while also achieving higher reliability and better accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0104] Figure 1 The figure is a schematic diagram of the method flow of the present invention.

[0105] Figure 2 Schematic diagram of the functional modules of the system of the present invention. DETAILED DESCRIPTION

[0106] like Figure 1 The method flow chart of the method of the present invention is shown as follows: The method for determining the operating state of a high-voltage distribution network disclosed in the present invention comprises the following steps:

[0107] S1. Divide the target high-voltage distribution network into grids according to the distribution area to obtain a number of distribution grids; specifically, the steps include:

[0108] Divide the target high-voltage distribution network into several distribution grids according to the set requirements;

[0109] The setting requirements specifically include: according to the power demand and geographical location of each plot in the distribution area, a group or several groups of power supply areas with electrical connections and independent of other lines are divided into the same grid; the geographical boundaries of roads are used as boundaries between grids; the distribution grid includes a 110 kV substation, the distribution grid is geographically continuous, and meets the safe operation requirements of the high-voltage power grid; the safe operation requirements of the high-voltage power grid specifically include: the high-voltage distribution network within the distribution grid can still be self-sufficient and meet the power supply safety requirements after any component fails under normal operating conditions;

[0110] S2. According to the distribution grid obtained in step S1, real-time data information of each distribution grid is obtained;

[0111] S3. According to the data information obtained in step S2, the safety index, reliability index, quality index, economic index and adaptability index of the target high-voltage distribution network are calculated;

[0112] In specific implementation, the safety indicator includes the following steps:

[0113] The limited voltage value is calculated using the following formula:

[0114] u s =max 所有配电网格 (u i -u N |)

[0115] Where u s is the limiting voltage value; u i is the voltage of the ith node in the distribution grid; u N is the rated voltage of the distribution grid;

[0116] The limited load value is calculated using the following formula:

[0117]

[0118] Where I j is the current of the jth branch in the distribution grid; I jL is the maximum allowable current carrying capacity of the jth branch in the distribution grid;

[0119] The safety index determination value is calculated using the following formula:

[0120] AP = a 1 u s +a 2 K

[0121] Where AP is the security index judgment value; a 1 is the first weight of the safety index (preferably 0.5); a2 is the second weight of the safety index (preferably 0.5);

[0122] Compare the obtained safety index judgment value with the set safety index range threshold:

[0123] If the safety index judgment value is within the safety index range threshold (preferably [0.93, 0.97]), the safety index is normal;

[0124] If the safety index judgment value is not within the safety index range threshold, the safety index is abnormal.

[0125] The reliability index specifically includes the following steps:

[0126] The switch failure rate is calculated using the following formula:

[0127] p c =p M +p E

[0128] Where p c is the switch failure rate; p M is the underreporting rate of switch failure; p E is the false alarm rate of switch failure;

[0129] The obtained switch failure rate is used as the reliability index judgment value, and the reliability index judgment value is compared with the set reliability index range threshold:

[0130] If the reliability index determination value is within the reliability index range threshold (preferably [0.70, 0.74]), the reliability index is determined to be normal;

[0131] If the reliability index determination value is not within the reliability index range threshold, the reliability index is determined to be abnormal.

[0132] The quality index specifically includes the following steps:

[0133] The three-phase unbalance rate is calculated using the following formula:

[0134]

[0135] Where ε j is the three-phase unbalance rate; I jmax is the maximum value of the three-phase current of the jth line; I jmin is the minimum value of the three-phase current of the jth line;

[0136] The following rules are used to obtain the three-phase unbalance rate determination value:

[0137] If εj >10%, the three-phase unbalance rate judgment value is 0;

[0138] If 5%<ε j ≤10%, the three-phase unbalance rate judgment value is 20;

[0139] If 0%<ε j ≤5%, the three-phase unbalance rate judgment value is 50;

[0140] If ε j =0, the three-phase unbalance rate judgment value is 0;

[0141] The three-phase unbalance is calculated using the following formula:

[0142]

[0143] Where ε is the three-phase unbalance; N is the total number of three-phase lines;

[0144] The following rules are used to obtain the three-phase unbalance determination value:

[0145] If ε>10%, the three-phase unbalance determination value is 0;

[0146] If 5%<ε≤10%, the three-phase unbalance determination value is 20;

[0147] If 0%<ε≤5%, the three-phase unbalance determination value is 50;

[0148] If ε=0, the three-phase unbalance determination value is 0;

[0149] The power factor determination value is calculated using the following formula:

[0150]

[0151] Where η is the power factor judgment value; is the power factor of the ith node; P i is the active power of the ith node; Q i is the reactive power of the i-th node;

[0152] The voltage drop percentage is calculated using the following formula:

[0153]

[0154] Where U down is the voltage drop percentage; U js is the voltage at the head end of the jth line; U je is the terminal voltage of the jth line;

[0155] The voltage drop percentage determination value is obtained using the following rule:

[0156] If max(U down )>4%, the voltage drop percentage determination value is 0;

[0157] If 2%<max(U down )≤4%, the voltage drop percentage determination value is 25;

[0158] If 0%<max(U down )≤2%, the voltage drop percentage determination value is 50;

[0159] If max(U down )=0, the voltage drop percentage judgment value is 0;

[0160] The voltage offset rate is calculated using the following formula:

[0161]

[0162] Where U shift is the voltage deviation rate; U jshifts is the voltage deviation rate at the first end, and U js is the voltage at the head end of the jth line, U jN is the rated voltage of the jth line; U jshifte is the terminal voltage deviation rate, and U je is the terminal voltage of the jth line;

[0163] The voltage offset rate determination value is obtained using the following rule:

[0164] If max(U shift )>4%, the voltage deviation rate judgment value is 0;

[0165] If 2%<max(U shift )≤4%, then the voltage deviation rate judgment value is 25;

[0166] If 0%<max(U shift )≤2%, the voltage deviation rate judgment value is 50;

[0167] If max(U shift )=0, the voltage deviation rate judgment value is 100;

[0168] The voltage qualification rate is calculated using the following formula:

[0169]

[0170] Where U st is the voltage qualification rate; Num(U sti) is the total number of nodes with qualified voltage; I is the total number of nodes;

[0171] The voltage qualification rate determination value is obtained using the following rules:

[0172] If 0≤U st <50%, the voltage qualification rate is 20;

[0173] If 50%≤U st <100%, the voltage qualification rate judgment value is 70;

[0174] If U st =100%, then the voltage qualification rate judgment value is 100;

[0175] The quality index judgment value is calculated using the following formula:

[0176] YP=c 1 ε j1 +c 2 ε 1 +c 3 η+c 4 U down1 +c 5 U shift1 +c 6 U st1

[0177] Where YP 1 is the first judgment value of the quality index; c 1 is the first weight of the quality index; j1 is the three-phase unbalance rate judgment value; c 2 is the second weight of the quality index; 1 is the three-phase unbalance determination value; c 3 The third weight of the quality index; c 4 It is the fourth weight of quality index; U down1 is the voltage drop percentage judgment value; c 5 It is the fifth weight of quality index; U shift1 is the voltage deviation rate judgment value; c 6 It is the sixth weight of quality index; U st1 is the voltage qualification rate judgment value;

[0178] Compare the obtained quality index judgment value with the set quality index range threshold:

[0179] If the quality index judgment value is within the quality index range threshold, the quality index is normal;

[0180] If the quality index judgment value is not within the quality index range threshold, the quality index is abnormal.

[0181] The economic indicators specifically include the following steps:

[0182] The network loss rate is calculated using the following formula:

[0183]

[0184] Where ΔA L is the network loss rate; ΔA ∑ A is the total power loss of the circuit network; g The total power supply for the circuit network;

[0185] The obtained network loss rate is used as the economic index judgment value, and the economic index judgment value is compared with the set economic index range threshold:

[0186] If the economic index judgment value is within the economic index range threshold (preferably [0.80, 0.85]), the economic index is normal;

[0187] If the economic index judgment value is not within the economic index range threshold, the economic index is abnormal.

[0188] The adaptability index specifically includes the following steps:

[0189] The average connection capacity of the line section is calculated using the following formula:

[0190]

[0191] Where R is the average connection capacity of the line section; j is the power distribution capacity installed on the jth line; k j is the number of segments of the jth line; m 1 is the total number of lines;

[0192] The obtained average connection capacity of the line section is used as the adaptability index judgment value, and the adaptability index judgment value is compared with the set adaptability index range threshold:

[0193] If the adaptability index judgment value is within the adaptability index range threshold (preferably [0.15, 0.25]), the adaptability index is normal;

[0194] If the adaptability index judgment value is not within the adaptability index range threshold, the adaptability index is abnormal;

[0195] In addition, the scheme of the present invention can also add some evaluation indicators. For example, in the safety evaluation, the single power line rate of the substation and the main transformer load rate can be added; in the quality evaluation, the voltage drop ratio and the power outage operation on-time restoration rate can be added.

[0196] S4. Determine the safety index, reliability index, quality index, economic index and adaptability index obtained in step S3 to complete the operation status determination of the target high-voltage distribution network; specifically, the following steps are included:

[0197] When the safety index is abnormal, the target high-voltage distribution network status is determined to be "urgent processing required";

[0198] When the reliability index is abnormal, the target high-voltage distribution network status is determined to be "abnormal pending inspection";

[0199] When the safety index, reliability index and quality index are all normal, the target high-voltage distribution network state is judged to be "normal operation";

[0200] When the economic index or the adaptability index is abnormal, the state of the target high-voltage distribution network is determined to be "to be optimized".

[0201] like Figure 2 The functional module schematic diagram of the system of the present invention is shown as follows: the system for realizing the method for determining the operating status of the high-voltage distribution network disclosed in the present invention comprises a grid division module, a data acquisition module, an index calculation module and a status determination module; the grid division module, the data acquisition module, the index calculation module and the status determination module are connected in series in sequence; the grid division module is used to grid the target high-voltage distribution network according to the distribution area to obtain a plurality of distribution grids, and upload the data information to the data acquisition module; the data acquisition module is used to obtain the data information of each distribution grid in real time according to the received data information and the obtained distribution grid, and upload the data information to the index calculation module; the index calculation module is used to calculate the safety index, reliability index, quality index, economic index and adaptability index of the target high-voltage distribution network according to the received data information and the obtained data information, and upload the data information to the status determination module; the status determination module is used to determine the obtained safety index, reliability index, quality index, economic index and adaptability index according to the received data information, so as to complete the operating status determination of the target high-voltage distribution network.

Claims

1. A method for determining the operating status of a high-voltage distribution network, comprising the following steps: S1. Divide the target high-voltage distribution network into grids according to the distribution areas to obtain a number of distribution grids; S2. According to the distribution grid obtained in step S1, real-time data information of each distribution grid is obtained; S3. According to the data information obtained in step S2, the safety index, reliability index, quality index, economic index and adaptability index of the target high-voltage distribution network are calculated; S4. Determine the safety index, reliability index, quality index, economic index and adaptability index obtained in step S3 to complete the operation status determination of the target high-voltage distribution network.

2. The method for determining the operating status of a high-voltage distribution network according to claim 1, characterized in that Step S1 of dividing the target high-voltage distribution network into grids according to the distribution areas to obtain a plurality of distribution grids specifically includes the following steps: Divide the target high-voltage distribution network into several distribution grids according to the set requirements; Among them, the setting requirements specifically include: according to the electricity demand and geographical location of each plot in the distribution area, a group or several groups of power supply areas with electrical connections and independent of other lines are divided into the same grid; the geographical boundaries of roads are used as boundaries between grids; the distribution grid includes a 110 kV substation, the distribution grid is geographically continuous, and meets the safe operation requirements of the high-voltage power grid; the safe operation requirements of the high-voltage power grid specifically include: the high-voltage distribution network within the distribution grid can still be self-sufficient and meet the power supply safety requirements after any component failure under normal operating conditions.

3. The method for determining the operating status of a high-voltage distribution network according to claim 2 is characterized in that The safety indicator specifically includes the following steps: The limited voltage value is calculated using the following formula: u s =max 所有配电网格 (u i -u N |) Where u s is the limiting voltage value; u i is the voltage of the ith node in the distribution grid; u N is the rated voltage of the distribution grid; The limited load value is calculated using the following formula: Where I j is the current of the jth branch in the distribution grid; I jL is the maximum allowable current carrying capacity of the jth branch in the distribution grid; The safety index determination value is calculated using the following formula: AP=a1u s +a2K Where AP is the security index judgment value; a1 is the first weight of the security index; a2 is the second weight of the security index; Compare the obtained safety index judgment value with the set safety index range threshold: If the safety index judgment value is within the safety index range threshold, the safety index is normal; If the safety index judgment value is not within the safety index range threshold, the safety index is abnormal.

4. The method for determining the operating status of a high-voltage distribution network according to claim 3 is characterized in that The reliability index specifically includes the following steps: The switch failure rate is calculated using the following formula: p c =p M +p E Where p c is the switch failure rate; p M is the underreporting rate of switch failure; p E is the false alarm rate of switch failure; The obtained switch failure rate is used as the reliability index judgment value, and the reliability index judgment value is compared with the set reliability index range threshold: If the reliability index determination value is within the reliability index range threshold, the reliability index is determined to be normal; If the reliability index determination value is not within the reliability index range threshold, the reliability index is determined to be abnormal.

5. The method for determining the operating status of a high-voltage distribution network according to claim 4, characterized in that The quality index specifically includes the following steps: The three-phase unbalance rate is calculated using the following formula: Where ε j is the three-phase unbalance rate; I jmax is the maximum value of the three-phase current of the jth line; I jmin is the minimum value of the three-phase current of the jth line; The following rules are used to obtain the three-phase unbalance rate determination value: If ε j >10%, the three-phase unbalance rate judgment value is 0; If 5%<ε j ≤10%, the three-phase unbalance rate judgment value is 20; If 0%<ε j ≤5%, the three-phase unbalance rate judgment value is 50; If ε j =0, the three-phase unbalance rate judgment value is 0; The three-phase unbalance is calculated using the following formula: Where ε is the three-phase unbalance; N is the total number of three-phase lines; The following rules are used to obtain the three-phase unbalance determination value: If ε>10%, the three-phase unbalance determination value is 0; If 5%<ε≤10%, the three-phase unbalance determination value is 20; If 0%<ε≤5%, the three-phase unbalance determination value is 50; If ε=0, the three-phase unbalance determination value is 0; The power factor determination value is calculated using the following formula: Where η is the power factor judgment value; is the power factor of the ith node; P i is the active power of the ith node; Q i is the reactive power of the i-th node; The voltage drop percentage is calculated using the following formula: Where U down is the voltage drop percentage; U js is the voltage at the head end of the jth line; U je is the terminal voltage of the jth line; The voltage drop percentage determination value is obtained using the following rule: If max(U down )>4%, the voltage drop percentage determination value is 0; If 2%<max(U down )≤4%, the voltage drop percentage determination value is 25; If 0%<max(U down )≤2%, the voltage drop percentage determination value is 50; If max(U down )=0, the voltage drop percentage judgment value is 0; The voltage offset rate is calculated using the following formula: Where U shift is the voltage deviation rate; U jshifts is the voltage deviation rate at the first end, and U js is the voltage at the head end of the jth line, U jN is the rated voltage of the jth line; U jshifte is the terminal voltage deviation rate, and U je is the terminal voltage of the jth line; The voltage offset rate determination value is obtained using the following rule: If max(U shift )>4%, the voltage deviation rate judgment value is 0; If 2%<max(U shift )≤4%, then the voltage deviation rate judgment value is 25; If 0%<max(U shift )≤2%, the voltage deviation rate judgment value is 50; If max(U shift )=0, the voltage deviation rate judgment value is 100; The voltage qualification rate is calculated using the following formula: Where U st is the voltage qualification rate; Num(U sti ) is the total number of nodes with qualified voltage; I is the total number of nodes; The voltage qualification rate determination value is obtained using the following rules: If 0≤U st <50%, the voltage qualification rate is 20; If 50%≤U st <100%, the voltage qualification rate judgment value is 70; If U st =100%, then the voltage qualification rate judgment value is 100; The quality index judgment value is calculated using the following formula: YP=c1ε j1 +c2ε1+c3η+c4U down1 +c5U shift1 +c6U st1 Where YP1 is the first judgment value of the quality index; c1 is the first weight of the quality index; ε j1 is the three-phase unbalance rate judgment value; c2 is the second weight of the quality index; ε1 is the three-phase unbalance degree judgment value; c3 is the third weight of the quality index; c4 is the fourth weight of the quality index; U down1 is the voltage drop percentage judgment value; c5 is the fifth weight of the quality index; U shift1 is the voltage deviation rate judgment value; c6 is the sixth weight of the quality index; U st1 is the voltage qualification rate judgment value; Compare the obtained quality index judgment value with the set quality index range threshold: If the quality index judgment value is within the quality index range threshold, the quality index is normal; If the quality index judgment value is not within the quality index range threshold, the quality index is abnormal.

6. The method for determining the operating status of a high-voltage distribution network according to claim 5, characterized in that The economic indicators specifically include the following steps: The network loss rate is calculated using the following formula: Where ΔA L is the network loss rate; ΔA ∑ A is the total power loss of the circuit network; g The total power supply for the circuit network; The obtained network loss rate is used as the economic index judgment value, and the economic index judgment value is compared with the set economic index range threshold: If the economic index judgment value is within the economic index range threshold, the economic index is normal; If the economic index judgment value is not within the economic index range threshold, the economic index is abnormal.

7. The method for determining the operating status of a high-voltage distribution network according to claim 6, characterized in that The adaptability index specifically includes the following steps: The average connection capacity of the line segment is calculated using the following formula: Where R is the average connection capacity of the line section; j is the power distribution capacity installed on the jth line; k j is the number of segments of the jth line; m1 is the total number of lines; The obtained average connection capacity of the line section is used as the adaptability index judgment value, and the adaptability index judgment value is compared with the set adaptability index range threshold: If the adaptability index judgment value is within the adaptability index range threshold, the adaptability index is normal; If the adaptability index judgment value is not within the adaptability index range threshold, the adaptability index is abnormal.

8. The method for determining the operating status of a high-voltage distribution network according to claim 7, characterized in that Step S4 of determining the safety index, reliability index, quality index, economic index and adaptability index obtained in step S3 specifically includes the following steps: When the safety index is abnormal, the target high-voltage distribution network status is determined to be "urgent processing required"; When the reliability index is abnormal, the target high-voltage distribution network status is determined to be "abnormal pending inspection"; When the safety index, reliability index and quality index are all normal, the target high-voltage distribution network status is judged to be "normal operation"; When the economic index or adaptability index is abnormal, the state of the target high-voltage distribution network is determined to be "to be optimized".

9. A system for implementing the method for determining the operating status of a high-voltage distribution network according to any one of claims 1 to 8, characterized in that It includes a grid division module, a data acquisition module, an index calculation module and a state determination module; the grid division module, the data acquisition module, the index calculation module and the state determination module are connected in series in sequence; the grid division module is used to divide the target high-voltage distribution network into grids according to the distribution area to obtain a number of distribution grids, and upload the data information to the data acquisition module; the data acquisition module is used to obtain the data information of each distribution grid in real time according to the received data information and the obtained distribution grid, and upload the data information to the index calculation module; The index calculation module is used to calculate the safety index, reliability index, quality index, economic index and adaptability index of the target high-voltage distribution network according to the received data information, and upload the data information to the status determination module; The state determination module is used to determine the safety index, reliability index, quality index, economic index and adaptability index obtained according to the received data information, so as to complete the operation state determination of the target high-voltage distribution network.

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