Power distribution network optimization control system based on flexible load and reactive compensation

Abstract

The invention discloses a power distribution network optimization control system based on flexible load and reactive compensation, which relates to the technical field of power distribution networks and comprises a flexible load data acquisition and analysis module, a reactive compensation data acquisition and analysis module and a power distribution network optimization control module. The control operation state coincidence index of each flexible load device of the iron and steel plant during power supply of the power grid and the improved operation state coincidence index of each reactive compensation device during power supply of the power grid are analyzed, overall load fluctuation caused by device individual abnormity is avoided, hidden dangers are reduced, a basis is provided for follow-up grade optimization, and the power supply efficiency is improved. The stability and adaptability of power grid operation are improved, the power distribution network optimization control coordination coincidence index of the iron and steel plant is evaluated, grade optimization is carried out, stable operation of equipment is guaranteed, the overall operation stability of the power distribution network is improved, and energy waste caused by single-equipment adjustment is reduced.

Description

Technical Field

[0001] This invention relates to the field of power distribution network technology, and more specifically to a power distribution network optimization control system based on flexible loads and reactive power compensation. Background Technology

[0002] With the rapid development of the social economy and the widespread application of new energy power generation technologies, the operating environment of power distribution networks is becoming increasingly complex. On the one hand, the connection of a large number of nonlinear loads has led to increasingly serious harmonic pollution problems in the power distribution network, which not only affects power quality but may also damage power equipment and shorten its service life. On the other hand, the increasing volatility of electricity load poses a severe challenge to the voltage stability of the power distribution network, and traditional voltage regulation methods are no longer sufficient to meet the needs of refined operation of the power distribution network. Therefore, it is necessary to analyze the power distribution network optimization control system based on flexible loads and reactive power compensation.

[0003] Existing technologies, such as the invention application patent with announcement number CN116760051B, disclose a method, device, and system for optimizing voltage and reactive power control in a power distribution network. In this system, the equipment reports the voltage and reactive power adjustment requirements to the master station. Based on the equipment's request and the regional voltage and reactive power optimization control target, the master station coordinates the interaction between equipment at all levels to achieve local reactive power balance, improve the transmission capacity of the lines, and optimize the regional voltage and reactive power control effect.

[0004] Existing technologies can meet the basic requirements for distribution network optimization control systems based on flexible loads and reactive power compensation, but they also have some potential defects and challenges, specifically in the following aspects: First, the existing technologies are not accurate enough in analyzing the compliance index of the control operation status of each flexible load device in the steel plant with the grid power supply and the compliance index of the improved operation status of each reactive power compensation device in the steel plant with the grid power supply. This leads to overall load fluctuations caused by individual equipment anomalies, increases hidden dangers, affects the decision-making bias caused by data fragmentation in traditional optimization, and consequently affects the basis for subsequent level optimization, reducing the stability and adaptability of grid operation.

[0005] Second, existing technologies do not pay enough attention to the evaluation of the coordination index of power distribution network optimization control in steel plants, which affects the level optimization, reduces the overall operational stability of the power distribution network, and leads to problems such as voltage collapse and production interruption caused by abnormal spread, and increases energy waste caused by single equipment regulation. Summary of the Invention

[0006] The purpose of this invention is to provide a power distribution network optimization control system based on flexible load and reactive power compensation, which solves the problems existing in the background technology.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a distribution network optimization control system based on flexible load and reactive power compensation, including a flexible load data acquisition and analysis module, a reactive power compensation data acquisition and analysis module, and a distribution network optimization control module.

[0008] Flexible load data acquisition and analysis module: Collects data on each flexible load device in the steel plant when it is powered by the power grid, obtains the physical status data and response data of each flexible load device, and then analyzes the control operation status of each flexible load device in the steel plant when it is powered by the power grid to meet the index.

[0009] Reactive power compensation data acquisition and analysis module: Collects data on each reactive power compensation device in the steel plant when it is powered by the power grid, obtains the switching status data and physical status data of each reactive power compensation device, and then analyzes the improvement operation status compliance index of each reactive power compensation device in the steel plant when it is powered by the power grid.

[0010] Distribution network optimization control module: Based on the control operation status compliance index of each flexible load equipment in the steel plant when powered by the grid and the improved operation status compliance index of each reactive power compensation equipment in the steel plant when powered by the grid, the module evaluates the coordination compliance index of the distribution network optimization control of the steel plant and performs level optimization.

[0011] Furthermore, the physical state data and response data of each flexible load device include: the rotational speed, heat preservation time, and heating level power of each flexible load device in the steel plant when powered by the grid; and the response data include the actual power supply duration, current harmonic order, and frequency deviation response value of each flexible load device in the steel plant when powered by the grid.

[0012] Furthermore, the control operation status conformity index of each flexible load device in the steel plant under grid power supply is analyzed using the following method: based on the obtained physical state data and response data of each flexible load device, the physical state conformity value of each flexible load device in the steel plant under grid power supply is analyzed. and response status match value Furthermore, the control operation status conformity index of various flexible load equipment in the steel plant under grid power supply is analyzed, and its specific calculation formula is as follows: ,in, This refers to the number of the flexible load device. , This represents the number of flexible load devices.

[0013] Furthermore, the specific analysis method for the physical state compliance values ​​of each flexible load device in the steel plant when powered by the grid is as follows: Based on the obtained rotational speed, heat preservation time, and heating power of each flexible load device in the steel plant when powered by the grid, the rotational speed, heat preservation time, and heating power of each flexible load device in the steel plant when powered by the grid are compared with the rotational speed compliance interval, heat preservation time compliance interval, and heating power compliance interval stored in the database. If the rotational speed, heat preservation time, and heating power of a certain flexible load device in the steel plant are within the rotational speed compliance interval, the heat preservation time is within the heat preservation time compliance interval, and the heating power is within the heating power compliance interval, then the physical state compliance value of that flexible load device in the steel plant when powered by the grid is recorded as 1; otherwise, it is recorded as -1. Thus, the physical state compliance values ​​of each flexible load device in the steel plant when powered by the grid are obtained. ,in, The values ​​include 1 and -1.

[0014] Furthermore, the specific analysis method for the response status compliance value of each flexible load device in the steel plant when powered by the grid is as follows: Based on the actual power supply duration, current harmonic number, and frequency deviation response value of each flexible load device in the steel plant when powered by the grid, the actual power supply duration, current harmonic number, and frequency deviation response value of each flexible load device in the steel plant when powered by the grid are compared with the safe range of the actual power supply duration, safe range of the current harmonic number, and safe range of the frequency deviation response value of each flexible load device in the steel plant when powered by the grid stored in the database. If the actual power supply duration of a certain flexible load device in the steel plant is within the safe range of the actual power supply duration, the current harmonic number is within the safe range of the current harmonic number, and the frequency deviation response value is within the safe range of the frequency deviation response value, then the response status compliance value of that flexible load device in the steel plant when powered by the grid is recorded as 1; otherwise, it is recorded as -1. Thus, the response status compliance value of each flexible load device in the steel plant when powered by the grid is obtained. , The values ​​include 1 and -1.

[0015] Furthermore, the switching status data and physical status data of each reactive power compensation device include: the switching completion time and switching trigger time of each reactive power compensation device in the steel plant when powered by the grid; and the physical status data of each reactive power compensation device includes: the DC power supply voltage value and heat dissipation temperature value of each reactive power compensation device in the steel plant at each time point when powered by the grid.

[0016] Furthermore, the analysis of the improved operating status compliance index of each reactive power compensation device in the steel plant under grid power supply is specifically conducted as follows: based on the obtained switching status data and physical status data of each reactive power compensation device, the analysis of the switching status compliance index of each reactive power compensation device in the steel plant under grid power supply is performed. And physical operation conforms to the index Furthermore, the improvement operation status compliance index of various reactive power compensation devices in the steel plant under grid power supply is analyzed, and its specific calculation formula is as follows: ,in, This indicates the serial number of the reactive power compensation device. , This represents the number of reactive power compensation devices.

[0017] Furthermore, the specific analysis method for the switching status compliance index of each reactive power compensation device in the steel plant during grid power supply is as follows: Based on the obtained switching completion time and switching trigger time of each reactive power compensation device in the steel plant during grid power supply, the switching completion time and switching trigger time of each reactive power compensation device in the steel plant during grid power supply are compared with the safe intervals of switching completion time and switching trigger time of each reactive power compensation device in the steel plant during grid power supply stored in the database. If the switching completion time and switching trigger time of each reactive power compensation device in the steel plant during grid power supply are within the safe intervals of switching completion time and switching trigger time, the switching status compliance index of the reactive power compensation device in the steel plant during grid power supply is recorded as 1; otherwise, it is recorded as -1. Thus, the switching status compliance index of each reactive power compensation device in the steel plant during grid power supply is obtained. ,in, The values ​​include 1 and -1.

[0018] Furthermore, the physical operation compliance index of the reactive power compensation equipment in the steel plant under grid power supply is analyzed using the following method: Based on the obtained DC power supply voltage and heat dissipation temperature values ​​of the reactive power compensation equipment in the steel plant at each time point under grid power supply, the DC power supply voltage and heat dissipation temperature values ​​of the reactive power compensation equipment in the steel plant at each time point under grid power supply are averaged to obtain the average DC power supply voltage and average heat dissipation temperature of each reactive power compensation equipment under grid power supply. Reference average DC power supply voltage and reference average heat dissipation temperature of the reactive power compensation equipment in the steel plant under grid power supply are then extracted from the database. The physical operation compliance index of the reactive power compensation equipment in the steel plant under grid power supply is then analyzed, and its specific calculation formula is as follows: ,in, and These represent the average reference DC power supply voltage and the average reference heat dissipation temperature of each reactive power compensation device in the steel plant when powered by the grid. and These represent the average DC power supply voltage and average heat dissipation temperature of each reactive power compensation device in the steel plant when powered by the grid.

[0019] Furthermore, the evaluation of the steel plant's power distribution network optimization control coordination compliance index and the subsequent level optimization are specifically analyzed as follows: based on the obtained control operation status compliance index of each flexible load device in the steel plant under grid power supply and the improved operation status compliance index of each reactive power compensation device in the steel plant under grid power supply, these are imported into the power grid optimization control model. Steel plant power distribution network optimization control coordination compliance index ,in, Represented as logical symbols AND, The logical symbol NOT represents... , These represent the reference index for the control operation status of each flexible load device in the steel plant when powered by the grid, and the reference index for the improved operation status of each reactive power compensation device in the steel plant when powered by the grid.

[0020] When the coordination compliance index of the steel plant's distribution network optimization control is 1, the steel plant's distribution network optimization control level is recorded as Level 1, and this state is maintained. When the coordination compliance index of the steel plant's distribution network optimization control is -1, the steel plant's distribution network optimization control level is recorded as Level 2. At that time, check the switching on / off state of the reactive power compensation equipment in the steel plant when it is powered by the grid, and start the backup cooling system to increase the heat dissipation temperature of the reactive power compensation equipment. At that time, reduce the speed and power level of the flexible load equipment in the steel plant when it is powered by the grid. In such cases, the power supply will be immediately cut off, and the emergency power generation system will be triggered to issue an early warning.

[0021] The beneficial effects of this invention are as follows: In the flexible load data acquisition and analysis module and the reactive power compensation data acquisition and analysis module: data is collected on each flexible load device of the steel plant when it is powered by the grid, obtaining the physical state data and response data of each flexible load device, and then analyzing the control operation status compliance index of each flexible load device of the steel plant when it is powered by the grid. Similarly, data is collected on each reactive power compensation device of the steel plant when it is powered by the grid, obtaining the switching status data and physical state data of each reactive power compensation device, and then analyzing the improvement operation status compliance index of each reactive power compensation device of the steel plant when it is powered by the grid. This avoids overall load fluctuations caused by individual device anomalies, reduces potential risks, avoids decision-making biases caused by data fragmentation in traditional optimization, provides a basis for subsequent level optimization, and improves the stability and adaptability of grid operation.

[0022] In the distribution network optimization control module: based on the control operation status compliance index of each flexible load equipment in the steel plant when the grid is supplying power and the improved operation status compliance index of each reactive power compensation equipment in the steel plant when the grid is supplying power, the distribution network optimization control coordination compliance index of the steel plant is evaluated and optimized at different levels to ensure stable operation of equipment, improve the overall operation stability of the distribution network, avoid the consequences of voltage collapse and production interruption caused by abnormal spread, and reduce energy waste caused by single equipment regulation. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the system structure connection of the present invention. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Reference Figure 1 As shown, the present invention provides a distribution network optimization control system based on flexible load and reactive power compensation, including: a flexible load data acquisition and analysis module, a reactive power compensation data acquisition and analysis module, and a distribution network optimization control module.

[0027] It should be noted that a database module is also included. The database is used to store the following information for each flexible load device in the steel plant when powered by the grid: rotational speed compliance range, heat preservation duration compliance range, heating level power compliance range, actual power supply duration safety range, current harmonic order safety range, frequency deviation response value safety range, switching completion time safety range, switching trigger time safety range, DC power supply voltage reference average and heat dissipation temperature reference average for each reactive power compensation device in the steel plant when powered by the grid, control operation status compliance reference index, and improved operation status compliance reference index for each reactive power compensation device in the steel plant when powered by the grid.

[0028] It should be noted that the flexible load data acquisition and analysis module is connected to the reactive power compensation data acquisition and analysis module, the reactive power compensation data acquisition and analysis module is connected to the distribution network optimization control module, and the flexible load data acquisition and analysis module, the reactive power compensation data acquisition and analysis module, and the distribution network optimization control module are each connected to the database.

[0029] Flexible load data acquisition and analysis module: Collects data on each flexible load device in the steel plant when it is powered by the power grid, obtains the physical status data and response data of each flexible load device, and then analyzes the control operation status of each flexible load device in the steel plant when it is powered by the power grid to meet the index.

[0030] It should be noted that the physical state data and response data are collected by the high-precision sensors built into the various flexible load equipment in the steel plant.

[0031] In the above embodiments, the physical state data and response data of each flexible load device include: the rotation speed, heat preservation time, and heating level power of each flexible load device in the steel plant when powered by the grid; and the response data include the actual power supply duration, current harmonic order, and frequency deviation response value of each flexible load device in the steel plant when powered by the grid.

[0032] It should be noted that the physical state data includes, but is not limited to, the rotational speed, heat preservation time, and heating power of each flexible load device in the steel plant when powered by the grid, and the response data includes, but is not limited to, the actual power supply duration, current harmonic order, and frequency deviation response value of each flexible load device in the steel plant when powered by the grid.

[0033] In the above embodiments, the control operation status conformity index of each flexible load device in the steel plant when powered by the grid is specifically analyzed as follows: based on the obtained physical state data and response data of each flexible load device, the physical state conformity value of each flexible load device in the steel plant when powered by the grid is analyzed. and response status match value Furthermore, the control operation status conformity index of various flexible load equipment in the steel plant under grid power supply is analyzed, and its specific calculation formula is as follows: ,in, This refers to the number of the flexible load device. , This represents the number of flexible load devices.

[0034] In the above embodiments, the specific analysis method for the physical state compliance values ​​of each flexible load device in the steel plant when powered by the power grid is as follows: Based on the obtained rotational speed, heat preservation time, and heating power of each flexible load device in the steel plant when powered by the power grid, the rotational speed, heat preservation time, and heating power of each flexible load device in the steel plant when powered by the power grid are compared with the rotational speed compliance interval, heat preservation time compliance interval, and heating power compliance interval stored in the database. If the rotational speed, heat preservation time, and heating power of a certain flexible load device in the steel plant are within the rotational speed compliance interval, the heat preservation time is within the heat preservation time compliance interval, and the heating power is within the heating power compliance interval, then the physical state compliance value of that flexible load device in the steel plant when powered by the power grid is recorded as 1; otherwise, it is recorded as -1. Thus, the physical state compliance values ​​of each flexible load device in the steel plant when powered by the power grid are obtained. ,in, The values ​​include 1 and -1.

[0035] In the above embodiments, the specific analysis method for the response status compliance value of each flexible load device of the steel plant when powered by the grid is as follows: Based on the actual power supply duration, current harmonic number, and frequency deviation response value of each flexible load device of the steel plant when powered by the grid, the actual power supply duration, current harmonic number, and frequency deviation response value of each flexible load device of the steel plant when powered by the grid are compared with the safe range of the actual power supply duration, safe range of the current harmonic number, and safe range of the frequency deviation response value of each flexible load device of the steel plant when powered by the grid stored in the database. If the actual power supply duration of a certain flexible load device of the steel plant is within the safe range of the actual power supply duration, the current harmonic number is within the safe range of the current harmonic number, and the frequency deviation response value is within the safe range of the frequency deviation response value, then the response status compliance value of that flexible load device of the steel plant when powered by the grid is recorded as 1; otherwise, it is recorded as -1, thereby obtaining the response status compliance value of each flexible load device of the steel plant when powered by the grid. , The values ​​include 1 and -1.

[0036] Reactive power compensation data acquisition and analysis module: Collects data on each reactive power compensation device in the steel plant when it is powered by the power grid, obtains the switching status data and physical status data of each reactive power compensation device, and then analyzes the improvement operation status compliance index of each reactive power compensation device in the steel plant when it is powered by the power grid.

[0037] It should be noted that the switching status data and physical status data of each reactive power compensation device are obtained by collecting data through the status monitoring relays and smart sensors that are paired with the various reactive power compensation devices in the steel plant.

[0038] In the above embodiments, the switching status data and physical status data of each reactive power compensation device include: the switching completion time and switching trigger time of each reactive power compensation device in the steel plant when the grid is supplying power; and the physical status data of each reactive power compensation device includes: the DC power supply voltage value and heat dissipation temperature value of each reactive power compensation device in the steel plant at each time point when the grid is supplying power.

[0039] It should be noted that the switching status data of each reactive power compensation device includes, but is not limited to, the switching completion time and switching trigger time of each reactive power compensation device in the steel plant when the grid is supplying power. The physical status data of each reactive power compensation device includes, but is not limited to, the DC power supply voltage value and heat dissipation temperature value of each reactive power compensation device in the steel plant at each time point when the grid is supplying power.

[0040] In the above embodiments, the specific analysis method for the improved operating status compliance index of each reactive power compensation device in the steel plant under grid power supply is as follows: based on the obtained switching status data and physical status data of each reactive power compensation device, the switching status compliance index of each reactive power compensation device in the steel plant under grid power supply is analyzed. And physical operation conforms to the index Furthermore, the improvement operation status compliance index of various reactive power compensation devices in the steel plant under grid power supply is analyzed, and its specific calculation formula is as follows: ,in, This indicates the serial number of the reactive power compensation device. , This represents the number of reactive power compensation devices.

[0041] In the above embodiments, the switching status compliance index of each reactive power compensation device in the steel plant during grid power supply is analyzed as follows: Based on the obtained switching completion time and switching trigger time of each reactive power compensation device in the steel plant during grid power supply, the switching completion time and switching trigger time of each reactive power compensation device in the steel plant during grid power supply are compared with the safe intervals of switching completion time and switching trigger time of each reactive power compensation device in the steel plant during grid power supply stored in the database. If the switching completion time and switching trigger time of each reactive power compensation device in the steel plant during grid power supply are within the safe intervals of switching completion time and switching trigger time, the switching status compliance index of the reactive power compensation device in the steel plant during grid power supply is recorded as 1; otherwise, it is recorded as -1. Thus, the switching status compliance index of each reactive power compensation device in the steel plant during grid power supply is obtained. ,in, The values ​​include 1 and -1.

[0042] In the above embodiments, the physical operation compliance index of each reactive power compensation device in the steel plant under grid power supply is analyzed as follows: Based on the obtained DC power supply voltage and heat dissipation temperature values ​​of each reactive power compensation device in the steel plant at each time point under grid power supply, the DC power supply voltage and heat dissipation temperature values ​​of each reactive power compensation device in the steel plant at each time point under grid power supply are averaged to obtain the average DC power supply voltage and average heat dissipation temperature of each reactive power compensation device under grid power supply. Reference average DC power supply voltage and reference average heat dissipation temperature of each reactive power compensation device in the steel plant under grid power supply are extracted from the database. Then, the physical operation compliance index of each reactive power compensation device in the steel plant under grid power supply is analyzed. The specific calculation formula is as follows: ,in, and These represent the average reference DC power supply voltage and the average reference heat dissipation temperature of each reactive power compensation device in the steel plant when powered by the grid. and These represent the average DC power supply voltage and average heat dissipation temperature of each reactive power compensation device in the steel plant when powered by the grid.

[0043] Distribution network optimization control module: Based on the control operation status compliance index of each flexible load equipment in the steel plant when powered by the grid and the improved operation status compliance index of each reactive power compensation equipment in the steel plant when powered by the grid, the module evaluates the coordination compliance index of the distribution network optimization control of the steel plant and performs level optimization.

[0044] In the above embodiments, the specific analysis method for evaluating the coordination compliance index of the steel plant's power distribution network optimization control and performing graded optimization is as follows: based on the obtained control operation status compliance index of each flexible load device in the steel plant when powered by the power grid and the improved operation status compliance index of each reactive power compensation device in the steel plant when powered by the power grid, these are imported into the power grid optimization control model. Steel plant power distribution network optimization control coordination compliance index ,in, Represented as logical symbols AND, The logical symbol NOT represents... , These represent the reference index for the control operation status of each flexible load device in the steel plant when powered by the grid, and the reference index for the improved operation status of each reactive power compensation device in the steel plant when powered by the grid.

[0045] When the coordination compliance index of the steel plant's distribution network optimization control is 1, the steel plant's distribution network optimization control level is recorded as Level 1, and this state is maintained. When the coordination compliance index of the steel plant's distribution network optimization control is -1, the steel plant's distribution network optimization control level is recorded as Level 2. At that time, check the switching on / off state of the reactive power compensation equipment in the steel plant when it is powered by the grid, and start the backup cooling system to increase the heat dissipation temperature of the reactive power compensation equipment. At that time, reduce the speed and power level of the flexible load equipment in the steel plant when it is powered by the grid. In such cases, the power supply will be immediately cut off, and the emergency power generation system will be triggered to issue an early warning.

[0046] It should be noted that the following parameters are set by relevant power grid professionals: rotational speed compliance range, heat preservation duration compliance range, heating level power compliance range, actual power supply duration safety range, current harmonic order safety range, frequency deviation response value safety range, switching completion time safety range, switching trigger time safety range, DC power supply voltage reference average value and heat dissipation temperature reference average value of each reactive power compensation device in the steel plant when powered by the grid, control operation status compliance reference index of each flexible load device in the steel plant when powered by the grid, and improved operation status compliance reference index of each reactive power compensation device in the steel plant when powered by the grid.

[0047] The above content is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined by the present invention, and all such modifications and additions should fall within the protection scope of the present invention.

Claims

1. A distribution network optimization control system based on flexible load and reactive power compensation, characterized in that, include: Flexible load data acquisition and analysis module: Collects data on each flexible load device in the steel plant when it is powered by the grid, obtains the physical status data and response data of each flexible load device, and then analyzes the control operation status of each flexible load device in the steel plant when it is powered by the grid to meet the index. Reactive power compensation data acquisition and analysis module: Collects data on each reactive power compensation device in the steel plant when it is powered by the grid, obtains the switching status data and physical status data of each reactive power compensation device, and then analyzes the improvement operation status compliance index of each reactive power compensation device in the steel plant when it is powered by the grid. Distribution network optimization control module: Based on the control operation status compliance index of each flexible load equipment in the steel plant when powered by the grid and the improved operation status compliance index of each reactive power compensation equipment in the steel plant when powered by the grid, the module evaluates the coordination compliance index of the distribution network optimization control of the steel plant and performs level optimization.

2. The power distribution network optimization control system based on flexible load and reactive power compensation according to claim 1, characterized in that, The physical state data and response data of each flexible load device are as follows: the physical state data includes the rotation speed, heat preservation time, and heating level power of each flexible load device in the steel plant when powered by the grid; the response data includes the actual power supply duration, current harmonic order, and frequency deviation response value of each flexible load device in the steel plant when powered by the grid.

3. The power distribution network optimization control system based on flexible load and reactive power compensation according to claim 2, characterized in that, The control operation status of each flexible load device in the steel plant conforms to an index when powered by the power grid, and the specific analysis method is as follows: Based on the obtained physical state data and response data of each flexible load device, the physical state compliance values ​​of each flexible load device in the steel plant under grid power supply are analyzed. and response status match value Furthermore, the control operation status conformity index of various flexible load equipment in the steel plant under grid power supply is analyzed, and its specific calculation formula is as follows: ,in, This refers to the number of the flexible load device. , , which represents the number of flexible load devices.

4. The distribution network optimization control system based on flexible load and reactive power compensation according to claim 3, characterized in that, The specific analysis method for the physical state conformity values ​​of the various flexible load devices in the steel plant when powered by the power grid is as follows: Based on the obtained rotational speed, holding time, and heating power of each flexible load device in the steel plant when powered by the grid, these parameters are compared with the corresponding ranges stored in the database. If a flexible load device's rotational speed falls within the range, its holding time falls within the range, and its heating power falls within the range, then the physical state compliance value for that flexible load device is recorded as 1; otherwise, it is recorded as -1. This process yields the physical state compliance values ​​for each flexible load device in the steel plant when powered by the grid. ,in, The values ​​include 1 and -1.

5. The distribution network optimization control system based on flexible load and reactive power compensation according to claim 3, characterized in that, The specific analysis method for the response status conformity values ​​of each flexible load device in the steel plant when powered by the power grid is as follows: Based on the actual power supply duration, current harmonic order, and frequency deviation response value of each flexible load device in the steel plant when powered by the grid, these parameters are compared with the safe ranges for actual power supply duration, current harmonic order, and frequency deviation response value stored in the database. If the actual power supply duration, current harmonic order, and frequency deviation response value of a certain flexible load device in the steel plant are within the safe range, then the response state compliance value of that flexible load device in the steel plant when powered by the grid is recorded as 1; otherwise, it is recorded as -1. This process yields the response state compliance values ​​for each flexible load device in the steel plant when powered by the grid. , The values ​​include 1 and -1.

6. The power distribution network optimization control system based on flexible load and reactive power compensation according to claim 1, characterized in that, The switching status data and physical status data of each reactive power compensation device include: the switching completion time and switching trigger time of each reactive power compensation device in the steel plant when the grid is supplying power; and the physical status data of each reactive power compensation device includes: the DC power supply voltage value and heat dissipation temperature value of each reactive power compensation device in the steel plant at each time point when the grid is supplying power.

7. The distribution network optimization control system based on flexible load and reactive power compensation according to claim 6, characterized in that, The analysis of the improved operating status conformity index of various reactive power compensation devices in the steel plant under grid power supply is specifically analyzed as follows: Based on the obtained switching status data and physical status data of each reactive power compensation device, the switching status conformity index of each reactive power compensation device in the steel plant under grid power supply is analyzed. And physical operation conforms to the index Furthermore, the improvement operation status compliance index of various reactive power compensation devices in the steel plant under grid power supply is analyzed, and its specific calculation formula is as follows: ,in, This indicates the serial number of the reactive power compensation device. , This represents the number of reactive power compensation devices.

8. The distribution network optimization control system based on flexible load and reactive power compensation according to claim 7, characterized in that, The switching status of the reactive power compensation equipment in the steel plant conforms to an index when powered by the power grid, and the specific analysis method is as follows: Based on the obtained switching completion time and switching trigger time of each reactive power compensation device in the steel plant during grid power supply, these times are compared with the safe intervals for switching completion time and switching trigger time stored in the database. If the switching completion time and switching trigger time of each reactive power compensation device in the steel plant are within the safe intervals, the switching status compliance index of that reactive power compensation device during grid power supply is recorded as 1; otherwise, it is recorded as -1. This yields the switching status compliance index of each reactive power compensation device in the steel plant during grid power supply. ,in, The values ​​include 1 and -1.

9. The power distribution network optimization control system based on flexible load and reactive power compensation according to claim 7, characterized in that, The physical operation compliance index of the various reactive power compensation devices in the steel plant when powered by the power grid is analyzed using the following method: Based on the obtained DC power supply voltage and heat dissipation temperature values ​​of each reactive power compensation device in the steel plant at various time points during grid power supply, the average values ​​of the DC power supply voltage and heat dissipation temperature of each reactive power compensation device in the steel plant at various time points during grid power supply are respectively processed to obtain the average DC power supply voltage and average heat dissipation temperature of each reactive power compensation device during grid power supply. Furthermore, reference average DC power supply voltage and reference average heat dissipation temperature of each reactive power compensation device in the steel plant during grid power supply are extracted from the database. Then, the physical operation compliance index of each reactive power compensation device in the steel plant during grid power supply is analyzed, and its specific calculation formula is as follows: ,in, and These represent the average reference DC power supply voltage and the average reference heat dissipation temperature of each reactive power compensation device in the steel plant when powered by the grid. and These represent the average DC power supply voltage and average heat dissipation temperature of each reactive power compensation device in the steel plant when powered by the grid.

10. The power distribution network optimization control system based on flexible load and reactive power compensation according to claim 1, characterized in that, The evaluation of the steel plant's power distribution network optimization control coordination conformity index, and the subsequent level optimization, are analyzed using the following specific methods: Based on the obtained control operation status compliance index of each flexible load equipment in the steel plant under grid power supply and the improved operation status compliance index of each reactive power compensation equipment in the steel plant under grid power supply, these are imported into the grid optimization control model. Steel plant power distribution network optimization control coordination compliance index ,in, Represented as logical symbols AND, The logical symbol NOT represents... , These respectively represent the reference index for the control operation status of each flexible load device in the steel plant when powered by the grid and the reference index for the improved operation status of each reactive power compensation device in the steel plant when powered by the grid. When the coordination compliance index of the steel plant's distribution network optimization control is 1, the steel plant's distribution network optimization control level is recorded as Level 1, and this state is maintained. When the coordination compliance index of the steel plant's distribution network optimization control is -1, the steel plant's distribution network optimization control level is recorded as Level 2. At that time, check the switching on / off state of the reactive power compensation equipment in the steel plant when it is powered by the grid, and start the backup cooling system to increase the heat dissipation temperature of the reactive power compensation equipment. At that time, reduce the speed and power level of the flexible load equipment in the steel plant when it is powered by the grid. In such cases, the power supply will be immediately cut off, and the emergency power generation system will be triggered to issue an early warning.

Images