Method for studying and judging operation reliability of low-frequency and low-voltage load shedding device based on multi-source aggregation

Abstract

The invention provides a multi-source aggregation-based low-frequency and low-voltage load shedding device operation reliability studying and judging method, which is used for studying and judging the reliability of the operation state of a low-frequency and low-voltage load shedding device by combining the importance of operation management of the low-frequency and low-voltage load shedding device and generating a pressing plate factor, a constant value factor, a blocking signal factor and a load type factor. And further judging the load shedding capacity factor according to the generation factor, uniformly studying and judging the dispersed parameters of the low-frequency and low-voltage load shedding device, and judging the safety and health degree of the low-frequency and low-voltage load shedding device and the power grid. According to the invention, the pressing plate factor, the constant value factor, the blocking signal factor, the load type factor and the load shedding capacity factor are visually displayed through the large visual screen, so that a worker can visually grasp the safety condition of the low-frequency and low-voltage load shedding device and the safety condition of a power grid. According to the invention, the monitoring and management capabilities of the low-frequency load shedding device are improved, the safe and stable operation of the device is ensured, and the safety and reliability of power grid operation are improved.

Description

Technical Field

[0001] The present invention relates to the field of power grid monitoring, and in particular to a method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation. Background Art

[0002] The concept of "three lines of defense" in the power system has further strengthened the status of low-frequency load shedding devices. As the third line of defense, low-frequency load shedding devices are the last guarantee for the safe and stable operation of the power grid, and are an important technical means to prevent the power system from being damaged and causing large-scale power outages after suffering extremely serious faults.

[0003] At present, the control system has some online monitoring functions for low-frequency and low-voltage load shedding, which can monitor the line load in real time. However, there are still some problems in the reliability monitoring of the operating status of low-frequency and low-voltage devices, as follows:

[0004] 1. The correctness of the low-frequency and low-voltage load reduction setting value cannot be verified;

[0005] 2. The low-frequency and low-voltage load reduction function pressure plate input status cannot be verified;

[0006] 3. The feeder load is an active load and cannot achieve the purpose of load reduction;

[0007] 4. The load reduction capacity cannot meet the established load reduction requirements, resulting in a low load reduction amount, affecting the overall load reduction effect;

[0008] 5. There is a locking signal in the low-frequency and low-voltage load reduction device, causing the load reduction function to fail. Summary of the invention

[0009] The purpose of the present invention is to provide a method for evaluating the operating reliability of a low-frequency and low-voltage load shedding device based on multi-source aggregation to solve the problems existing in the above-mentioned background technology. The present invention combines the importance of the operation management of the low-frequency and low-voltage load shedding device, evaluates the reliability of the operating state of the low-frequency and low-voltage load shedding device, automatically identifies the hidden dangers in the operation of the low-frequency and low-voltage load shedding device, and gives early warning. The monitoring and management capabilities of the low-frequency load shedding device are improved, the safe and stable operation of the device is ensured, and the safety and reliability of the power grid operation are improved.

[0010] The present invention provides a method for evaluating the reliability of low-frequency and low-voltage load shedding device operation based on multi-source aggregation. By collecting information of low-frequency and low-voltage load shedding devices, the reliability of protection pressure plates, fixed value information, locking signals, load types and load shedding capacity of low-frequency and low-voltage load shedding devices is evaluated according to the pre-set pressure plate factor generation strategy, fixed value factor generation strategy, locking signal factor generation strategy, load type factor generation strategy and load shedding capacity factor generation strategy. Hidden dangers in the operation of low-frequency and low-voltage load shedding devices can be automatically identified, and early warning can be given. The monitoring and management capabilities of low-frequency load shedding devices are improved, the safe and stable operation of the devices is ensured, and the safety and reliability of power grid operation are improved.

[0011] The present invention provides a method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation, which is characterized by comprising the following specific steps:

[0012] S1: Obtain the soft pressure plate information, switch quantity information, alarm information, analog quantity information, and export hard pressure plate collection information of the low-frequency and low-voltage load reduction device;

[0013] S2: Obtain the pressure plate setting state information, fixed value setting information, and load shedding amount;

[0014] S3: Generate a pressure plate factor according to the switch quantity information and the pressure plate setting state information through the pressure plate factor generation strategy, assign the corresponding pressure plate factor to the calculated properties of the low-frequency and low-voltage load reduction device, and transmit the pressure plate factor to the visualization interface, which displays the pressure plate factor;

[0015] S4: Generate a fixed value factor according to the soft pressure plate information and the fixed value setting information through the fixed value factor generation strategy, assign the corresponding fixed value factor to the calculated properties of the low-frequency low-voltage load reduction device, and transmit the fixed value factor to the visualization interface, which displays the fixed value factor;

[0016] S5: Generate a blocking signal factor according to the switch quantity information and the alarm information through the blocking signal factor generation strategy, assign a corresponding blocking signal factor to the calculated properties of the low-frequency and low-voltage load reduction device, and transmit the blocking signal factor to the visualization interface, which displays the blocking signal factor;

[0017] S6: Generate a load type factor according to the simulation information and the load type factor generation strategy, assign a corresponding load type factor to the calculated properties of the low-frequency and low-voltage load reduction device, and transmit the load type factor to the visualization interface, which displays the load type factor;

[0018] S7: Based on the analog quantity information, the load to be cut, the pressure plate factor generated by S3, the set value factor generated by S4, the locking signal factor generated by S5, and the load type factor generated by S6, the load reduction capacity factor is generated according to the load reduction capacity factor generation strategy, and the load reduction capacity factor is transmitted to the visualization interface, which displays the load reduction capacity factor.

[0019] A further improvement of the present invention is that the soft pressure plate information includes: low-frequency action set value, low-frequency action time, low-voltage action set value, low-voltage action time, low-frequency load reduction soft pressure plate operating status, low-voltage load reduction soft pressure plate operating status; the switch quantity information includes: low-frequency load reduction hard pressure plate operating status, low-voltage load reduction hard pressure plate operating status, "spring has no energy storage and delays for 10s to be the point value of the closed position"; the alarm information includes: PT line break value, CT line break value, control loop line break value, device abnormality value; the analog quantity information includes: active power value, and the export hard pressure plate acquisition information includes: trip export hard pressure plate operating status.

[0020] A further improvement of the present invention is that the pressure plate setting state includes the low-frequency load shedding hard pressure plate setting state, the low-voltage load shedding hard pressure plate setting state, and the tripping outlet hard pressure plate setting state; the fixed value setting information includes the low-frequency action setting value, the low-frequency action time setting value, the low-voltage action setting value, the low-voltage action time, the low-frequency load shedding soft pressure plate operating state control setting value, and the low-voltage load shedding soft pressure plate operating state control setting value.

[0021] The present invention has the following beneficial effects:

[0022] In the power grid system, since the distribution of low-frequency and low-voltage load shedding devices is relatively scattered, and the point information of the protection devices of the devices are all single values, which are not related to each other, there is a lack of a unified mechanism. The present invention finds the low-frequency and low-voltage load shedding devices that can actually participate in load shedding through the point information of the protection devices, and effectively judges the safety of power grid operation.

[0023] Only when the pressure plate factor, fixed value factor and locking signal factor of the low-frequency low-voltage load shedding device are normal and the load type factor is "passive feeder", can it be determined that the low-frequency low-voltage load shedding device is truly involved in load shedding. The present invention systematizes the determination link and mainly divides the above determination link into pressure plate factor generation strategy, fixed value factor generation strategy, locking signal factor generation strategy and load type factor generation strategy. By analyzing the pressure plate factor, fixed value factor, locking signal factor and load type factor, the staff can quickly find out the reason why the low-frequency low-voltage load shedding device cannot participate in load shedding.

[0024] The present invention can quickly determine whether the low-frequency and low-voltage load shedding devices actually involved in the load shedding meet the needs of the power grid load shedding through the load shedding capacity factor generation strategy. If it does not meet the needs of the power grid load shedding, other factors (pressure plate factor, set value factor, locking signal factor, load type factor) can also provide substantial adjustment suggestions to the staff.

[0025] The present invention intuitively displays the pressure plate factor, set value factor, locking signal factor, load type factor, and load reduction capacity factor through a large visual screen, so that the staff can intuitively grasp the safety status of the low-frequency and low-voltage load reduction device and the safety status of the power grid.

[0026] The present invention collects the operating parameters of the low-frequency load shedding device in real time, studies and judges the reliability of the operating status of the low-frequency and low-voltage load shedding device, automatically identifies hidden dangers in the operation of the low-frequency and low-voltage load shedding device, and gives early warnings. The monitoring and management capabilities of the low-frequency load shedding device are improved, the safe and stable operation of the device is ensured, and the safety and reliability of the power grid operation are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0028] Figure 1 It is the overall flow chart of the present invention.

[0029] Figure 2 It is a flow chart of the platen factor generation strategy.

[0030] Figure 3 It is a flow chart of the fixed value factor generation strategy.

[0031] Figure 4 is a flow chart of the blocking signal factor generation strategy.

[0032] Figure 5 It is a flow chart of the load shedding capacity factor generation strategy.

[0033] Figure 6 It is a schematic diagram of the situation where the factors meet the requirements and can participate in generating the load reduction capacity factor.

[0034] Figure 7 This is a schematic diagram of the situation where the factor does not meet the requirements and cannot participate in generating the load reduction capacity factor.

[0035] Figure 8 It is a schematic diagram of a large visualized screen for information display according to the present invention. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] See also Figures 1 to 7 , the present invention provides several embodiments.

[0038] Example 1

[0039] See also Figure 1 This embodiment provides a method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation, comprising the following specific steps:

[0040] S1: Obtain the soft pressure plate information, switch quantity information, alarm information, analog quantity information, and export hard pressure plate collection information of the low-frequency and low-voltage load reduction device;

[0041] S2: Obtain the pressure plate setting state information, fixed value setting information, and load shedding amount;

[0042] S3: Based on the switch quantity information and the pressure plate setting state information, a pressure plate factor is generated through a pressure plate factor generation strategy, and the corresponding pressure plate factor is assigned to the calculated properties of the low-frequency low-voltage load reduction device, and the pressure plate factor is transmitted to the visualization interface, and the visualization interface displays the pressure plate factor. The pressure plate factor generation strategy specifically includes the following steps, please refer to Figure 2 :

[0043] S301: Compare the low-frequency load shedding hard pressure plate setting state in the pressure plate setting state information and the low-frequency load shedding hard pressure plate operation state in the switch quantity information to see if they are consistent. If they are consistent, set B 1 =1, execute S303; otherwise, set B 1 =0, execute S302;

[0044] S302: When the setting state of the low-frequency load shedding hard pressure plate is "on", and the operating state of the low-frequency load shedding hard pressure plate is "off", the information "the low-frequency load shedding hard pressure plate should be on but is not on" is generated and transmitted to the visualization interface; when the setting state of the low-frequency load shedding hard pressure plate is "off", and the operating state of the low-frequency load shedding hard pressure plate is "on", the information "the low-frequency load shedding hard pressure plate should be off but is not off" is generated and transmitted to the visualization interface, and S303 is executed;

[0045] S303: Compare the low-voltage load shedding hard pressure plate setting state in the pressure plate setting state information and the low-voltage load shedding hard pressure plate operation state in the switch quantity information to see if they are consistent. If they are consistent, set B 2 =1, execute S305; otherwise, set B 2 =0, execute S304;

[0046] S304: When the setting state of the low-voltage load shedding hard pressure plate is "on", and the operating state of the low-voltage load shedding hard pressure plate is "off", the information "the low-voltage load shedding hard pressure plate should be on but is not on" is generated and transmitted to the visualization interface; when the setting state of the low-voltage load shedding hard pressure plate is "off", and the operating state of the low-voltage load shedding hard pressure plate is "on", the information "the low-voltage load shedding hard pressure plate should be off but is not off" is generated and transmitted to the visualization interface, and S305 is executed;

[0047] S305: Compare the trip outlet hard pressure plate setting state in the pressure plate setting state and the trip outlet hard pressure plate operation state in the outlet hard pressure plate collection information to see if they are consistent. If they are consistent, set B 3 =1, execute S307; otherwise, set B 3 =0, execute S306;

[0048] S306: When the setting state of the hard pressure plate at the tripping outlet is "on", and the operating state of the hard pressure plate at the tripping outlet is "off", the information "the hard pressure plate at the tripping outlet should be on but is not on" is generated and transmitted to the visualization interface; when the setting state of the hard pressure plate at the tripping outlet is "off", and the operating state of the hard pressure plate at the tripping outlet is "on", the information "the hard pressure plate at the tripping outlet should be off but is not off" is generated and transmitted to the visualization interface, and S307 is executed;

[0049] S307: When B 1 =1, B 2 =1, B 3 =1, the "pressure plate factor is normal" information is generated and transmitted to the visualization interface;

[0050] S308: End;

[0051] S4: Generate a fixed value factor according to the soft pressure plate information and the fixed value setting information through the fixed value factor generation strategy, assign the corresponding fixed value factor to the calculated properties of the low-frequency low-voltage load reduction device, and transmit the fixed value factor to the visualization interface, which displays the fixed value factor. The fixed value factor generation strategy specifically includes the following steps, please refer to Figure 3 :

[0052] S401: Compare whether the low-frequency load shedding soft pressure plate operation state in the soft pressure plate information is the same as the low-frequency load shedding soft pressure plate operation state control setting value in the fixed value setting information. If they are the same, execute S402; otherwise, execute S407:

[0053] S402: Compare whether the low-voltage load shedding soft pressure plate operation state in the soft pressure plate information is the same as the low-voltage load shedding soft pressure plate operation state control setting value in the fixed value setting information. If they are the same, execute S403; otherwise, execute S407;

[0054] S403: Compare whether the low-frequency action setting value in the soft pressure plate information is the same as the low-frequency action setting value in the setting value setting information. If they are the same, execute S404; otherwise, execute S407;

[0055] S404: Compare whether the low-pressure action setting value in the soft pressure plate information is the same as the low-pressure action setting value in the setting value setting information. If they are the same, execute S405; otherwise, execute S407;

[0056] S405: Compare whether the low-frequency action time in the soft pressure plate information is the same as the low-frequency action time setting value in the fixed value setting information. If they are the same, execute S406; otherwise, execute S407;

[0057] S406: Compare whether the low-pressure action time in the soft pressure plate information is the same as the low-pressure action time setting value in the fixed value setting information. If they are the same, generate a "normal fixed value factor" signal and transmit it to the visualization interface, and execute S408; otherwise, execute S407;

[0058] S407: Generate a "consistent value factor" signal and transmit it to the visualization interface, and execute S208;

[0059] S408: End;

[0060] S5: Generate a blocking signal factor according to the switch quantity information and the alarm information through the blocking signal factor generation strategy, assign the corresponding blocking signal factor to the calculated properties of the low-frequency low-voltage load reduction device, and transmit the blocking signal factor to the visualization interface, which displays the blocking signal factor. The blocking signal factor generation strategy specifically includes the following steps, please refer to Figure 4 :

[0061] S501: Obtain the PT disconnection value in the alarm information, recorded as C 1 ; Get the CT disconnection value in the alarm information, recorded as C 2 ; Get the control loop disconnection value in the alarm information, recorded as C 3 ; Get the device abnormal value in the alarm information, recorded as C 4 ; Get the "point value of the spring without energy storage and delay of 10s to the closed position" in the switch quantity information, recorded as C 5 The low-frequency and low-voltage load reduction device has two signal points, namely "spring not storing energy" and "control circuit disconnection". When the switch changes position normally, "spring not storing energy" and "control circuit disconnection" will be closed first, and then change position and open after 10s. If the switch changes position normally during operation and "control circuit disconnection" and "spring not storing energy" are still in the closed position 10s after "spring not storing energy delay 10s" is generated and stored in the storage device;

[0062] S502: Calculate normal value Cnorm , the calculation method is as follows:

[0063]

[0064] in, is the negation operator, and ∨ is the or operator;

[0065] S503: Calculate the normal value C norm After that, when the normal value is 1, the "locking signal factor is normal" information is generated and transmitted to the visualization interface; otherwise, the "locking signal factor is abnormal" information is generated and transmitted to the visualization interface;

[0066] S504: End;

[0067] S6: Generate a load type factor according to the analog quantity information and the load type factor generation strategy, assign a corresponding load type factor to the calculated properties of the low-frequency and low-voltage load reduction device, and transmit the load type factor to the visualization interface, which displays the load type factor. The specific steps of the load type factor generation strategy are: determine whether the active load in the analog quantity information is greater than or equal to 0. If the active power value in the analog quantity information is greater than or equal to 0, it is determined to be a passive feeder, and a "passive feeder" signal is generated and transmitted to the visualization interface; otherwise, it is determined to be an active feeder, and an "active feeder" signal is generated and transmitted to the visualization interface;

[0068] S7: Generate a load shedding capacity factor according to the simulation information, the load to be shedding, the pressure plate factor generated by S3, the fixed value factor generated by S4, the blocking signal factor generated by S5, and the load type factor generated by S6, and transmit the load shedding capacity factor to the visualization interface. The visualization interface displays the load shedding capacity factor. The load shedding capacity factor generation strategy includes the following specific steps, please refer to Figure 5 :

[0069] S701: Statistics of "pressure plate factor is normal"; "setting factor is normal"; "locking signal factor is normal"; "load type factor is "passive feeder"; and the low-frequency and low-voltage load reduction device with the hard pressure plate of the trip outlet in the operating state of "input" (see Figure 6 ), as the low-frequency and low-voltage load reduction device to be calculated;

[0070] S702: Calculate the total load shedding capacity of all low-frequency and low-voltage load shedding devices to be calculated. The calculation method is as follows:

[0071] P TY =∑P i

[0072] Among them, P TY Indicates the load shedding capacity, P irepresents the active power value of the i-th low-frequency and low-voltage load reduction device to be calculated;

[0073] S703: Determine whether the total load shedding amount is greater than the required load shedding amount. If the load shedding amount is greater than the required load shedding amount, generate “normal load shedding capacity” information and transmit the “normal load shedding capacity” information to the visualization interface; otherwise, generate “insufficient load shedding capacity” information and transmit it to the visualization interface.

[0074] Among them, the soft pressure plate information includes: low-frequency action fixed value, low-frequency action time, low-voltage action fixed value, low-voltage action time, low-frequency load shedding soft pressure plate operating state, low-voltage load shedding soft pressure plate operating state; the switch quantity information includes: low-frequency load shedding hard pressure plate operating state, low-voltage load shedding hard pressure plate operating state, "spring does not store energy and delays 10s to close the point value"; the alarm information includes: PT disconnection value, CT disconnection value, control circuit disconnection value, device abnormality value; the analog quantity information includes: active power value, and the outlet hard pressure plate acquisition information includes: trip outlet hard pressure plate operating state. It is common knowledge for those skilled in the art to obtain this information.

[0075] Among them, the pressure plate setting state includes the low-frequency load shedding hard pressure plate setting state, the low-voltage load shedding hard pressure plate setting state, and the trip outlet hard pressure plate setting state; the fixed value setting information includes the low-frequency action setting value, the low-frequency action time setting value, the low-voltage action setting value, the low-voltage action time, the low-frequency load shedding soft pressure plate operation state control setting value, and the low-voltage load shedding soft pressure plate operation state control setting value. The above information is obtained from the management system, which is a professional system for maintaining power grid security.

[0076] Among them, B 1 , B 2 , B 3 It is a temporary variable used to determine the pressure plate factor.

[0077] It is worth explaining that "pressure plate factor is normal", "low-frequency load reduction hard pressure plate should be put in but is not put in", "low-frequency load reduction hard pressure plate should be withdrawn but is not withdrawn", "low-voltage load reduction hard pressure plate should be put in but is not put in", "low-voltage load reduction hard pressure plate should be withdrawn but is not withdrawn", "tripping outlet hard pressure plate should be put in but is not put in", "tripping outlet hard pressure plate should be withdrawn but is not withdrawn" are all pressure plate factors. Among them, "low-frequency load reduction hard pressure plate should be put in but is not put in", "low-frequency load reduction hard pressure plate should be withdrawn but is not withdrawn", "low-voltage load reduction hard pressure plate should be put in but is not put in", "low-voltage load reduction hard pressure plate should be withdrawn but is not withdrawn", "tripping outlet hard pressure plate should be put in but is not put in", "tripping outlet hard pressure plate should be withdrawn but is not withdrawn" are "abnormal pressure plate factors" and are all pressure plate factors.

[0078] It is worth noting that "normal fixed value factors" and "inconsistent fixed value factors" are both fixed value factors.

[0079] It is worth noting that "locking signal factor normal" and "locking signal factor abnormal" are both locking signal factors.

[0080] It is worth mentioning that “active feeder” and “passive feeder” are both load type factors.

[0081] It is worth noting that "normal load shedding capacity" and "insufficient load shedding capacity" are both load shedding capacity factors. Load shedding capacity factors are factors that describe the overall health status of the power grid.

[0082] It is worth noting that the soft pressure plate information, switch quantity information, alarm information, analog quantity information, and export hard pressure plate collection information are low-frequency low-voltage load reduction device collection information. The pressure plate setting state information, fixed value setting information, and load shedding amount are setting information. The pressure plate factor, fixed value factor, locking signal factor, load type factor, and load reduction capacity factor are all health factors.

[0083] It is worth mentioning that the creativity of multi-source aggregation is reflected in the use of multiple angles (pressure plate, set value, lock, feeder, load shedding capacity) to evaluate the health of the low-frequency and low-voltage load shedding device, and to judge the reliability of the low-frequency and low-voltage load shedding device through the calculation of the load shedding capacity. If the "load shedding capacity is insufficient", it means that the low-frequency and low-voltage load shedding device is not reliable. If the "load shedding capacity is normal", it means that the low-frequency and low-voltage load shedding device as a whole meets the needs of the power grid.

[0084] It is worth noting that the method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation is completed through a reliability evaluation system.

[0085] It is worth noting that when the load shedding capacity factor is "insufficient load shedding capacity", the system will calculate the maximum total load shedding capacity P of the low-frequency and low-voltage load shedding device. max (Operation load shedding capacity + standby load shedding capacity), the specific calculation method is:

[0086] P max =P TY +∑P j +∑P d +α k ·∑P k

[0087] Among them, P TY Indicates the load shedding capacity;

[0088] P j Indicates the jth low-frequency and low-voltage load shedding device with "normal pressure plate factor", "normal setting factor", "normal blocking signal factor", "passive feeder" load type factor, and "exit" hard pressure plate operation status of the trip outlet;

[0089] P dIndicates the dth low-frequency and low-voltage load reduction device with "normal pressure plate factor", "abnormal setting factor", "normal blocking signal factor" and load type factor of "passive feeder";

[0090] P k Indicates the kth low-frequency and low-voltage load reduction device with "normal pressure plate factor", "abnormal setting factor", "abnormal blocking signal factor" and load type factor of "passive feeder";

[0091] α k The contribution rate of the low-frequency and low-voltage load reduction device with the kth "normal pressure plate factor", "normal setting factor", "abnormal blocking signal factor" and load type factor of "passive feeder" is related to the PT disconnection value, CT disconnection value, control circuit disconnection value, device abnormality value and "point value of the spring without energy storage delay of 10s to the closed position" of the low-frequency and low-voltage load reduction device obtained by S5. The specific corresponding relationship is shown in the following table:

[0092]

[0093]

[0094] Among them, C 1 Indicates PT disconnection value; C 2 Indicates CT disconnection value; C 3 Indicates the control loop disconnection value; C 4 Indicates abnormal value of the device; C 5 It means “the point value when the spring has no energy stored and delays for 10s to reach the closed position”, and “-” means any value.

[0095] Compare whether the total maximum load shedding amount is less than the required load shedding amount. If it is less than the required load shedding amount, generate a warning message to warn that the low-frequency and low-voltage load shedding device is extremely abnormal, and send the information of the extreme abnormality of the low-frequency and low-voltage load shedding device to the administrator's mobile phone and the visual large screen through the server.

Claims

1. A method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation, characterized in that: The specific steps include: S1: Obtain the soft pressure plate information, switch quantity information, alarm information, analog quantity information, and export hard pressure plate collection information of the low-frequency and low-voltage load reduction device; S2: Obtain the pressure plate setting state information, fixed value setting information, and load shedding amount; S3: Generate a pressure plate factor according to the switch quantity information and the pressure plate setting state information through the pressure plate factor generation strategy, assign the corresponding pressure plate factor to the calculated properties of the low-frequency and low-voltage load reduction device, and transmit the pressure plate factor to the visualization interface, which displays the pressure plate factor; S4: Generate a fixed value factor according to the soft pressure plate information and the fixed value setting information through the fixed value factor generation strategy, assign the corresponding fixed value factor to the calculated properties of the low-frequency low-voltage load reduction device, and transmit the fixed value factor to the visualization interface, which displays the fixed value factor; S5: Generate a blocking signal factor according to the switch quantity information and the alarm information through the blocking signal factor generation strategy, assign a corresponding blocking signal factor to the calculated properties of the low-frequency and low-voltage load reduction device, and transmit the blocking signal factor to the visualization interface, which displays the blocking signal factor; S6: Generate a load type factor according to the simulation information and the load type factor generation strategy, assign a corresponding load type factor to the calculated properties of the low-frequency and low-voltage load reduction device, and transmit the load type factor to the visualization interface, which displays the load type factor; S7: Based on the analog quantity information, the load to be cut, the pressure plate factor generated by S3, the set value factor generated by S4, the locking signal factor generated by S5, and the load type factor generated by S6, the load reduction capacity factor is generated according to the load reduction capacity factor generation strategy, and the load reduction capacity factor is transmitted to the visualization interface, which displays the load reduction capacity factor.

2. According to the method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation according to claim 1, it is characterized in that: The soft pressure plate information includes: low-frequency action set value, low-frequency action time, low-voltage action set value, low-voltage action time, low-frequency load reduction soft pressure plate operating status, low-voltage load reduction soft pressure plate operating status; the switch quantity information includes: low-frequency load reduction hard pressure plate operating status, low-voltage load reduction hard pressure plate operating status, "spring has no energy storage and delays 10s to the closed position point value"; the alarm information includes: PT line break value, CT line break value, control loop line break value, device abnormality value; the analog quantity information includes: active power value, and the export hard pressure plate acquisition information includes: trip export hard pressure plate operating status.

3. The method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation according to claim 2 is characterized in that: The pressure plate setting status includes the low-frequency load shedding hard pressure plate setting status, the low-voltage load shedding hard pressure plate setting status, and the trip outlet hard pressure plate setting status; the fixed value setting information includes the low-frequency action setting value, the low-frequency action time setting value, the low-voltage action setting value, the low-voltage action time, the low-frequency load shedding soft pressure plate operating status control setting value, and the low-voltage load shedding soft pressure plate operating status control setting value.

4. The method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation according to claim 3 is characterized in that: The platen factor generation strategy includes the following specific steps: S301: Compare whether the low-frequency load shedding hard pressure plate setting state in the pressure plate setting state information and the low-frequency load shedding hard pressure plate operation state in the switch quantity information are consistent. If they are consistent, set B1=1 and execute S303; otherwise, set B1=0 and execute S302; S302: When the setting state of the low-frequency load shedding hard pressure plate is "on", and the operating state of the low-frequency load shedding hard pressure plate is "off", the information "the low-frequency load shedding hard pressure plate should be on but is not on" is generated and transmitted to the visualization interface; when the setting state of the low-frequency load shedding hard pressure plate is "off", and the operating state of the low-frequency load shedding hard pressure plate is "on", the information "the low-frequency load shedding hard pressure plate should be off but is not off" is generated and transmitted to the visualization interface, and S303 is executed; S303: Compare whether the low-voltage load shedding hard pressure plate setting state in the pressure plate setting state information and the low-voltage load shedding hard pressure plate operation state in the switch quantity information are consistent. If they are consistent, set B2=1 and execute S305; otherwise, set B2=0 and execute S304; S304: When the setting state of the low-voltage load shedding hard pressure plate is "on", and the operating state of the low-voltage load shedding hard pressure plate is "off", the information "the low-voltage load shedding hard pressure plate should be on but is not on" is generated and transmitted to the visualization interface; when the setting state of the low-voltage load shedding hard pressure plate is "off", and the operating state of the low-voltage load shedding hard pressure plate is "on", the information "the low-voltage load shedding hard pressure plate should be off but is not off" is generated and transmitted to the visualization interface, and S305 is executed; S305: Compare whether the trip outlet hard pressure plate setting state in the pressure plate setting state and the trip outlet hard pressure plate operation state in the outlet hard pressure plate collection information are consistent. If they are consistent, set B3=1 and execute S307; otherwise, set B3=0 and execute S306; S306: When the setting state of the trip outlet hard pressure plate is "on", and the operating state of the trip outlet hard pressure plate is "off", the information "the trip outlet hard pressure plate should be on but is not on" is generated and transmitted to the visualization interface; when the setting state of the trip outlet hard pressure plate is "off", and the operating state of the trip outlet hard pressure plate is "on", the information "the trip outlet hard pressure plate should be off but is not off" is generated and transmitted to the visualization interface, and S307 is executed; S307: When B1=1, B2=1, and B3=1, the "pressing plate factor is normal" information is generated and transmitted to the visualization interface; S308: End.

5. The method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation according to claim 4 is characterized in that: The specific steps of the fixed value factor generation strategy are: S401: Compare whether the low-frequency load shedding soft pressure plate operation state in the soft pressure plate information is the same as the low-frequency load shedding soft pressure plate operation state control setting value in the fixed value setting information. If they are the same, execute S402; otherwise, execute S407; S402: Compare whether the low-voltage load shedding soft pressure plate operation state in the soft pressure plate information is the same as the low-voltage load shedding soft pressure plate operation state control setting value in the fixed value setting information. If they are the same, execute S403; Otherwise, execute S407; S403: Compare whether the low-frequency action setting value in the soft pressure plate information is the same as the low-frequency action setting value in the setting value setting information. If they are the same, execute S404; otherwise, execute S407; S404: Compare whether the low-pressure action setting value in the soft pressure plate information is the same as the low-pressure action setting value in the setting value setting information. If they are the same, execute S405; otherwise, execute S407; S405: Compare whether the low-frequency action time in the soft pressure plate information is the same as the low-frequency action time setting value in the fixed value setting information. If they are the same, execute S406; Otherwise, execute S407; S406: Compare whether the low-pressure action time in the soft pressure plate information is the same as the low-pressure action time setting value in the fixed value setting information. If they are the same, generate a "normal fixed value factor" signal and transmit it to the visualization interface, and execute S408; otherwise, execute S407; S407: Generate a "consistent fixed value factor" signal and transmit it to the visualization interface, and execute S208; S408: End.

6. The method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation according to claim 5 is characterized in that: The blocking signal factor generation strategy includes the following specific steps: S501: obtain the PT disconnection value in the alarm information, recorded as C1; obtain the CT disconnection value in the alarm information, recorded as C2; obtain the control circuit disconnection value in the alarm information, recorded as C3; obtain the device abnormality value in the alarm information, recorded as C4; obtain the "point value of the spring without energy storage delay of 10s to the closed position" in the switch quantity information, recorded as C5; S502: Calculate normal value C norm , the calculation method is as follows: in, is the negation operator, and ∨ is the or operator; S503: Calculate the normal value C norm After that, when the normal value is 1, the "locking signal factor is normal" information is generated and transmitted to the visualization interface; otherwise, the "locking signal factor is abnormal" information is generated and transmitted to the visualization interface.

7. The method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation according to claim 6 is characterized in that: The specific steps of the load type factor generation strategy are: judging whether the active load in the analog information is greater than or equal to 0; if the active power value in the analog information is greater than or equal to 0, it is judged as a passive feeder, and a "passive feeder" signal is generated and transmitted to the visualization interface; otherwise, it is judged as an active feeder, and an "active feeder" signal is generated and transmitted to the visualization interface.

8. The method for evaluating the operating reliability of a low-frequency and low-voltage load reduction device based on multi-source aggregation according to claim 7 is characterized in that: The load shedding capacity factor generation strategy includes the following specific steps: S701: Count the low-frequency and low-voltage load shedding devices with "normal pressure plate factor", "normal setting value factor", "normal blocking signal factor", "passive feeder" load type factor, and "initiated" hard pressure plate operation status at the trip outlet as the low-frequency and low-voltage load shedding devices to be calculated; S702: Calculate the total load shedding capacity of all low-frequency and low-voltage load shedding devices to be calculated. The calculation method is as follows: P TY =∑P i Among them, P TY Indicates the load shedding capacity, P i Represents the active power value of the i-th low-frequency and low-voltage load reduction device to be calculated: S703: Determine whether the total load shedding amount is greater than the required load shedding amount. If the load shedding amount is greater than the required load shedding amount, generate "normal load shedding capacity" information and transmit the "normal load shedding capacity" information to the visualization interface; otherwise, generate "insufficient load shedding capacity" information and transmit it to the visualization interface.

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