Dynamic cooperative flashover control method and system for electric precipitator

Abstract

The invention relates to a dynamic cooperative flashover control method and system for an electric precipitator, and belongs to the technical field of electric precipitator power supply control. The method comprises the following steps: collecting dust concentrations of an inlet and an outlet of the electric dust remover and secondary voltage and secondary current data of each internal electric field, setting flashover frequency values of the head and tail electric fields according to a comparison result of the dust concentration values and a preset mapping curve, and calculating flashover frequency set values of each internal electric field by adopting a gradient coefficient; when flashover occurs in the single electric field, the closing duration time of the high-voltage power supply is controlled according to the charge release time constant of the dust layer, and then the flashover critical voltage is recovered through the two-stage boosting process; when flashover occurs in the multiple electric fields at the same time, the flashover electric field voltage is dynamically reduced according to the flashover voltage and the real-time frequency, and the normal electric field voltage is correspondingly increased; according to the method, optimal distribution of global energy can be realized, so that the dust removal efficiency is improved, and flashover is inhibited.

Description

Technical Field

[0001] This invention relates to a dynamic coordinated flashover control method and system for electrostatic precipitators, belonging to the field of power supply control technology for electrostatic precipitators. Background Technology

[0002] Electrostatic precipitators (ESPs), as a core technology for industrial flue gas purification, efficiently remove dust, fumes, and micron-sized particles generated during industrial production, playing an irreplaceable role in modern industrial systems. The working principle of an ESP involves applying a high-voltage DC power supply between the discharge and collection electrodes, exciting a negative corona discharge that generates dense ions. When dust-laden flue gas passes through the electric field, the dust particles become charged and separate from the airflow under the influence of the electric field, migrating towards the collection electrode and depositing there. The dust is then removed from the collection electrode using physical methods such as rapping. During operation, when the electric field strength reaches a critical point, the gas between the anode and cathode plates breaks down, resulting in a momentary flashover. This discharge phenomenon is accompanied by a noticeable popping sound, visible sparks, and a sudden drop in voltage and current, affecting not only dust removal efficiency but also potentially threatening equipment safety. The complex and variable nature of actual operating conditions makes flashover within the electric field difficult to avoid. Frequent flashover significantly reduces dust removal efficiency and affects the reliability of the power supply system. At the same time, if the flashover frequency is set too low, the electric field strength may be reduced in order to control the flashover phenomenon, which is not conducive to dust collection.

[0003] For example, Chinese invention patent application CN107727978A discloses a method and system for detecting spark flashover in an electrostatic precipitator, including the following steps: collecting feedback signals of the secondary voltage and secondary current of the electric field inside the precipitator; setting multiple time parameters to perform specific calculations on the feedback signals to obtain multiple smooth moving averages of the feedback signals, and forming a family of smooth moving averages; judging the spark flashover signal and generating the spark flashover energy level based on the intersection relationship of the smooth moving averages in the family of smooth moving averages. This patent focuses on the detection and energy level analysis of spark flashover, obtaining a family of smooth moving averages by calculating the feedback signals and judging based on the intersection relationship; however, it requires the simultaneous calculation of multiple smooth moving averages, which places high demands on the real-time sampling frequency and MCU computing power; it relies on the number of intersection points to judge the energy level, and when dense small sparks occur, they may be misjudged as a single large flashover.

[0004] For example, Chinese invention patent application CN106391314A discloses a spark tracking control method for an electrostatic precipitator, including the following steps: by analyzing the voltage of an adjacent flashover fault and predicting the possible fault voltage of the current electric field using a generalized regression neural network, and based on this, improving the three-wire method, designing a more reasonable fault initiation voltage setting strategy and voltage rise rate calculation method. This patent focuses on spark tracking control, using the fault voltage to improve the voltage recovery strategy and increase the average voltage of the electric field; the data update mechanism simply deletes old data and ignores trend changes during gradual changes in operating conditions; when using GRNN again, historical flashover voltage data needs to be initialized, and failure is predicted under cold start or low spark rate conditions.

[0005] To adapt to frequent power grid peak-shaving demands, coal-fired boilers often need to drastically adjust their load operation within a short period, leading to drastic fluctuations in the dust concentration at the inlet of the electrostatic precipitator. However, existing flashover control methods are mostly based on the pre-flashover operating conditions and preset frequency control values, making it difficult to effectively cope with sudden changes in inlet dust concentration. Therefore, there is an urgent need for a flashover control method that can automatically control the flashover frequency, voltage ramp rate, and globally optimize each electric field based on dust concentration and electrostatic precipitator operating conditions. Summary of the Invention

[0006] To address the problems existing in the prior art, this invention proposes a dynamic coordinated flashover control method and system for electrostatic precipitators.

[0007] The technical solution of the present invention is as follows: On the one hand, this invention proposes a dynamic coordinated flashover control method for electrostatic precipitators, comprising the following steps: Real-time data collection of dust content at the inlet and outlet of the electrostatic precipitator, as well as the secondary current and secondary voltage of each electric field; Based on the dust content at the inlet and the arrangement order of each electric field along the airflow direction, a gradient flashover frequency setting value is set for each electric field; the change value of dust content at the inlet is detected in real time, and when the change value is not zero, the flashover frequency setting value of each electric field is adaptively adjusted based on the preset dust-frequency response curve. The system monitors the electric fields in real time based on the secondary current and secondary voltage of each field to detect whether spark flashover occurs and obtains the corresponding real-time flashover frequency and flashover voltage value. If a spark flashover occurs in a single electric field, the system executes a flashover response control strategy to adjust the voltage and control the spark flashover frequency. If a spark flashover occurs in multiple electric fields, the system dynamically allocates the operating voltage of each electric field and controls the spark flashover frequency based on the real-time flashover frequency, flashover voltage value, and dust content at the outlet using a dynamic optimization strategy based on fuzzy control.

[0008] Preferably, the method sets a gradient flashover frequency setting value for each electric field. Specifically, along the airflow direction inside the electrostatic precipitator, the flashover frequency setting value of the first-stage electric field is the highest, and the flashover frequency setting value of each electric field decreases step by step along the airflow direction according to a preset decreasing range.

[0009] Preferably, the flashover response control strategy is as follows: When a spark flashover is detected in a single electric field, the high-voltage power supply output of that electric field is immediately shut off. The charge release time constant of the dust layer in that electric field is used as the restart time of the high-voltage power supply. When the high-voltage power supply shutdown duration reaches the restart time, the high-voltage power supply output is turned on, and the high-voltage power supply of that electric field is controlled to rapidly increase to a preset intermediate voltage value. After the voltage is increased to the intermediate voltage value, the high-voltage power supply of that electric field is controlled to slowly increase to the flashover critical voltage of that electric field.

[0010] Preferably, the calculation steps for the preset intermediate voltage value include: When the real-time flashover frequency of a single electric field is less than its flashover frequency set value, the intermediate voltage value is expressed by the formula: ; In the formula, Indicates the intermediate voltage value. This is an empirical coefficient. Indicates the flashover point voltage value; When the real-time flashover frequency of a single electric field is greater than or equal to its flashover frequency set value, the intermediate voltage value is expressed by the formula: ; In the formula, Indicates the real-time flashover frequency. This indicates the flashover frequency setting.

[0011] Preferably, the method further includes calculating a slow boost rate, and when executing the flashover response control strategy, controlling the high-voltage power supply of the electric field to slowly boost to the flashover critical voltage of the electric field according to the slow boost rate, specifically: When the real-time flashover frequency of a single electric field is less than its flashover frequency set value, the boost rate is expressed by the formula: ; In the formula, Indicates the boost rate. This represents the boost rate coefficient. This indicates the boost rate setting value; When the real-time flashover frequency of a single electric field is greater than or equal to its flashover frequency setpoint, the boost rate is expressed by the formula: ; In the formula, Indicates the real-time flashover frequency. This indicates the flashover frequency setting.

[0012] Preferably, the dynamic optimization strategy based on fuzzy control to dynamically allocate the operating voltage of each electric field to control the spark flashover frequency specifically involves adjusting the operating voltage of each electric field, including: For electric fields where the real-time flashover frequency reaches or exceeds the set flashover frequency value, the operating voltage is gradually reduced based on the flashover point voltage of the electric field. The reduction in operating voltage is positively correlated with the degree to which the flashover frequency exceeds the preset flashover frequency value, as expressed by the formula: ; In the formula, This indicates the magnitude of the decrease in operating voltage. Indicates the real-time flashover frequency. This indicates the flashover frequency setting value. Indicates the flashover point voltage value; While reducing the operating voltage of the electric field, the operating voltage of the electric field whose real-time flashover frequency has not reached or exceeded the flashover frequency set value is gradually increased. The voltage rise is expressed by the formula: ; In the formula, Indicates the voltage boost magnitude. Indicates the compensation coefficient. This indicates the operating voltage of the electric field before the boost voltage was increased; After adjusting the operating voltage of each electric field, continuously monitor the dust content at the outlet of the electrostatic precipitator and correct the compensation coefficient based on the changing trend of the outlet dust content.

[0013] On the other hand, the present invention also proposes a dynamic coordinated flashover control system for electrostatic precipitators, comprising the following modules: Data Acquisition Module: Real-time acquisition of dust content at the inlet and outlet of the electrostatic precipitator, as well as secondary current and secondary voltage of each electric field; Parameter setting and adjustment module: Based on the dust content at the inlet and the arrangement order of each electric field along the airflow direction, a gradient flashover frequency setting value is set for each electric field; the change value of dust content at the inlet is detected in real time, and when the change value is not zero, the flashover frequency setting value of each electric field is adaptively adjusted based on the preset dust-frequency response curve. Flashover frequency control module: It monitors whether spark flashover occurs in the electric field in real time based on the secondary current and secondary voltage of each electric field, and obtains the corresponding real-time flashover frequency and flashover voltage value. If a spark flashover occurs in a single electric field, it executes the flashover response control strategy to adjust the voltage to control the spark flashover frequency. If a spark flashover occurs in multiple electric fields, it dynamically allocates the working voltage of each electric field to control the spark flashover frequency based on the real-time flashover frequency, flashover voltage value and dust content at the outlet using a dynamic optimization strategy based on fuzzy control.

[0014] In another aspect, the present invention also proposes an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the method as described in any embodiment of the present invention.

[0015] In another aspect, the present invention also proposes a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in any embodiment of the present invention.

[0016] The present invention has the following beneficial effects: (1) This invention relates to a dynamic coordinated flashover control method and system for electrostatic precipitators. It dynamically determines the target flashover frequency value of the primary electric field by real-time acquisition of dust concentration at the inlet and outlet of the electrostatic precipitator and comparison with a preset dust concentration-flashover frequency mapping curve. Furthermore, it utilizes the internal electric field flashover frequency gradient coefficient to generate progressively decreasing flashover frequency setpoints for each stage of the electric field along the airflow direction. This mechanism enables the electric field operating parameters to accurately match actual dust load changes, significantly improving energy utilization efficiency while ensuring dust removal efficiency, thus achieving a dynamic balance between dust removal effect and energy consumption.

[0017] (2) This invention relates to a dynamic coordinated flashover control method and system for electrostatic precipitators. By calculating the charge release time constant based on the physicochemical properties of the dust layer (such as resistivity, dielectric constant, and thickness), the duration of high-voltage power supply shutdown is scientifically set to ensure that the residual charge in the dust layer is fully released. After power restart, a unique two-stage voltage boosting strategy is adopted: first, the voltage is quickly restored to the intermediate voltage value calculated from the flashover point voltage, and then the voltage is steadily approached to the critical voltage with an adaptively adjusted boosting rate. This control logic fundamentally avoids the risk of continuous flashover during the voltage recovery process, greatly enhancing the stability of system operation and the reliability of equipment.

[0018] (3) The present invention is a dynamic coordinated flashover control method and system for an electrostatic precipitator. By recording the real-time flashover frequency and flashover point voltage of each electric field, coordinated voltage regulation is performed: the working voltage of the flashover frequency generating field is actively reduced, and the voltage reduction amplitude is dynamically calculated according to the degree to which the real-time frequency exceeds the set value; at the same time, the working voltage of the stable operating electric field is increased by a certain compensation coefficient; the coordinated working strategy not only prevents excessive energy consumption and equipment stress in the local electric field, but also compensates for the overall dust removal capacity by increasing the intensity of other electric fields, thus ensuring the overall performance and stability of the system under harsh working conditions. Attached Figure Description

[0019] Figure 1 This is a flowchart of the flashover control method provided in Embodiment 1 of the present invention; Figure 2 This is a schematic diagram of the flashover response control strategy proposed in Embodiment 1 of the present invention. Detailed Implementation

[0020] 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.

[0021] It should be understood that the step numbers used in the text are for ease of description only and are not intended to limit the order in which the steps are performed.

[0022] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0023] The terms “comprising” and “including” indicate the presence of the described feature, whole, step, operation, element and / or component, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0024] The term “and / or” refers to any combination of one or more of the associated listed items, as well as all possible combinations, and includes these combinations.

[0025] Example 1: See Figure 1 This embodiment proposes a dynamic coordinated flashover control method for electrostatic precipitators, including the following steps: S100: Collects the dust concentration values ​​at the inlet and outlet of the electrostatic precipitator, as well as the feedback signals of the secondary voltage and secondary current of each level of the internal electric field. S200. Based on the comparison between the dust concentration value and the preset dust concentration flashover frequency mapping curve, the flashover frequency value of the first-stage electric field is obtained; the flashover frequency gradient coefficient of the internal electric field is set, and the flashover frequency setting value of each stage of the electric field inside the electrostatic precipitator is obtained according to the flashover frequency setting value of the first-stage electric field and the final-stage electric field. For example, since the inlet concentration of an electrostatic precipitator is generally 20-100 g / Nm³, the first-stage electric field needs to handle high-concentration dust and has the highest set frequency, while the final-stage electric field needs to stably ensure dust removal efficiency and has the lowest set frequency, with each stage decreasing by 0.6-0.8. Therefore, the dust concentration flashover frequency mapping curve of the first-stage electric field is divided into three intervals, including: A1. Low concentration range: Dust concentration in this range Corresponding flashover frequency setting value The inlet concentration is low, the operating conditions are good, the gas is easily ionized and not easily broken down; the electric field can operate stably at a high voltage with very few flashovers; the control system can set the allowable flashover frequency at a low reference level, thereby pursuing the highest dust removal efficiency. A2. Main working area: Dust concentration in this area The corresponding flashover frequency setting value is expressed by the formula: ; in, This indicates the flashover frequency setting value. This represents a proportionality coefficient with a value between 5 and 25. This indicates the real-time dust concentration at the inlet. Indicates the inlet reference concentration. ; To prevent the flashover frequency from rising sharply at high dust concentrations, causing frequent triggering of the control system's protection, the restrictions are relaxed in advance. This allows the high-voltage power supply to maintain a high secondary current and voltage when dust concentration fluctuates, ensuring continuous and stable operation. The proportional coefficient determines the system's sensitivity to changes in dust concentration. A3. High Concentration Protection Zone: Dust concentration in this zone... Corresponding flashover frequency setting value This is a safety threshold; a certain amount of flashover is allowed to maintain the secondary current and voltage of the electric field, but its maximum frequency must be limited to prevent frequent flashovers from causing electrical damage to high-voltage power supply equipment.

[0026] S300: Based on the feedback signals of the secondary voltage and secondary current of the internal electric field of the electrostatic precipitator, multiple time parameters are set to perform specific calculations on the feedback signals to obtain multiple smooth moving averages of the feedback signals. The multiple smooth moving averages form a family of smooth moving averages. Based on the relationship between the smooth moving averages in the family of smooth moving averages, the flashover signal is determined and detected. The detection method is existing technology and will not be described in detail here. S301, see also Figure 2 When a flashover is detected in an internal electric field, the duration of the high-voltage power supply shutdown for the electrostatic precipitator is set based on the calculated charge release time constant of the dust layer, expressed by the formula: ; In the formula, This represents the charge release time constant of the dust layer. Indicates the relative permittivity of the dust layer. Denotes the vacuum permittivity, which is , Indicates dust thickness. Indicates the dust collection area of ​​the electric field. This indicates the resistivity of the dust layer.

[0027] It should be noted that the dust layer can be equivalent to a circuit with a resistor and a capacitor connected in parallel. When powered by a high-voltage power supply, the voltage obtained by the electric field is a unipolar voltage. The charge accumulated on the dielectric surface of the dust layer cannot be discharged through the power supply circuit, but can only decay exponentially through the volume resistance R of the dust layer.

[0028] S302. After the high-voltage power supply of the electrostatic precipitator ends, calculate the intermediate voltage value based on the flashover voltage value, turn on the high-voltage power supply, and quickly boost the high-voltage power supply to the intermediate voltage value through the first stage of voltage boosting to ensure the strength requirements of the dust collection electric field; at the same time, adjust the magnitude of the intermediate voltage value according to the relationship between the real-time flashover frequency and the flashover frequency set value to avoid continuous flashover caused by excessively rapid voltage boosting. When the real-time flashover frequency is less than the flashover frequency set value, the voltage will be continuously and stably increased to the intermediate voltage value, as expressed by the formula: ; In the formula, Indicates the intermediate voltage value. This represents a constant whose value ranges from 0.5 to 0.9. Indicates the flashover point voltage value; When the real-time flashover frequency exceeds the flashover frequency set value, the high-voltage power supply adjusts the intermediate voltage value, expressed by the formula: ; In the formula, This represents a constant whose value ranges from 0.5 to 0.9. Indicates the flashover point voltage value. Indicates the intermediate voltage value. Indicates the real-time flashover frequency. This indicates the flashover frequency setting.

[0029] Among them, each electric field The value decreases as the inlet dust concentration increases; the final stage electric field... The value is generally set to 0.9 to ensure a rapid voltage rise to a high field strength state after a flashover; simultaneously, if another flashover occurs during the rapid rise phase, the value is reduced. value.

[0030] S303. After the high voltage power supply is boosted to the intermediate voltage value, the high voltage power supply is slowly boosted to the flashover critical voltage value through the second boost stage. At the same time, the boost rate is adjusted according to the relationship between the real-time flashover frequency and the flashover frequency setting value to obtain the critical voltage value that does not cause continuous flashover. When the real-time flashover frequency is less than the flashover frequency set value, the boost rate is expressed by the formula: ; In the formula, Indicates the boost rate. This represents the boost rate coefficient. This indicates the boost rate setting value; When the real-time flashover frequency is greater than or equal to the flashover frequency set value, the boost rate is expressed by the formula: ; In the formula, Indicates the boost rate. This represents the boost rate coefficient. This indicates the boost rate setpoint. Indicates the real-time flashover frequency. This indicates the flashover frequency setting.

[0031] Among them, the front electric field The value is generally set to 1, representing the final stage electric field. The value is generally set to 0.5, with a faster voltage rise rate in the front electric field and a relatively gentler voltage rise rate in the final electric field.

[0032] It should be noted that the occurrence of a real-time flashover frequency exceeding the set flashover frequency value is due to the dynamic changes in the flue gas conditions at the electrostatic precipitator inlet (such as dust concentration, temperature, humidity, and composition); in the first stage of voltage boosting, the high-voltage power supply is rapidly boosted to an intermediate voltage value, based on the initial flashover voltage value and... The value is based on the relatively good operating conditions in the previous few seconds, but in the short one or two seconds of this rapid rise, the dust concentration at the inlet may suddenly increase sharply, resulting in an increase in space charge in the electric field, a decrease in insulation performance, and an instantaneous decrease in the actual flashover point.

[0033] For example, the flashover point voltage at this time is 60kV and If the value is 0.8, then the intermediate voltage value = 60kV * 0.8 = 48kV; the system is rapidly climbing towards 48kV, but when the voltage reaches 45kV, a large amount of high-concentration dust suddenly enters the electric field, causing the electric field strength at 45kV to exceed the breakdown threshold under the current dust conditions, thus triggering continuous flashover; as a result, during the process of rapidly rising to the target intermediate voltage value, the real-time flashover frequency has already exceeded the flashover frequency setting value.

[0034] Furthermore, when the dust collector is first powered on or recovering from a flashover, the electric field voltage is very low; through the first stage of voltage boosting, the real-time flashover frequency is constantly monitored. if This indicates that the calculated intermediate voltage value is safe and the operating condition is stable. After reaching the intermediate voltage value, it will switch to the slow rise stage, exploring higher field strength in a smoother and more refined way to maximize dust collection efficiency.

[0035] if This indicates that the calculated intermediate voltage value has failed and the current operating condition is worse than expected. It will immediately calculate a new intermediate voltage value based on the current real-time flashover frequency to adapt to the new operating condition. After reaching the new intermediate voltage value, it will enter the second stage of voltage boosting, slowly boosting the high-voltage power supply to the flashover critical voltage value.

[0036] S304. Based on the feedback signals of the secondary voltage and secondary current of the internal electric fields at each level, flashover is detected in multiple internal electric fields. The flashover voltage value and real-time flashover frequency are recorded. Based on the flashover voltage value and real-time flashover frequency, the working voltage of the electric field where flashover occurs is reduced, and the working voltage of the electric field where flashover does not occur is increased. When the flashover frequency of a certain electric field reaches or exceeds the flashover frequency set value, the operating voltage is reduced according to the flashover point voltage value. The reduction amount is determined based on the degree of exceedance of the flashover frequency, expressed by the formula: ; In the formula, This indicates the magnitude of the decrease in operating voltage. Indicates the real-time flashover frequency. This indicates the flashover frequency setting value. Indicates the flashover point voltage value; Simultaneously, the operating voltage of the electric field is increased if the flashover frequency does not reach the set flashover frequency value. The voltage boost is expressed by the formula: ; In the formula, This indicates the magnitude of the increase in operating voltage. This represents the compensation coefficient, with a value ranging from 0 to 0.3. It increases sequentially according to the electric field. After voltage adjustment, the outlet dust concentration is continuously monitored, and the compensation coefficient is corrected accordingly. The closer the outlet dust concentration is to the emission limit, the higher the compensation coefficient. This indicates the operating voltage of the electric field before the boost voltage was increased.

[0037] Example 2: This embodiment also proposes a dynamic coordinated flashover control system for electrostatic precipitators, including: Data Acquisition Module: Real-time acquisition of dust content at the inlet and outlet of the electrostatic precipitator, as well as secondary current and secondary voltage of each electric field; Parameter setting and adjustment module: Based on the dust content at the inlet and the arrangement order of each electric field along the airflow direction, a gradient flashover frequency setting value is set for each electric field; the change value of dust content at the inlet is detected in real time, and when the change value is not zero, the flashover frequency setting value of each electric field is adaptively adjusted based on the preset dust-frequency response curve. Flashover frequency control module: It monitors whether spark flashover occurs in the electric field in real time based on the secondary current and secondary voltage of each electric field, and obtains the corresponding real-time flashover frequency and flashover voltage value. If a spark flashover occurs in a single electric field, it executes the flashover response control strategy to adjust the voltage to control the spark flashover frequency. If a spark flashover occurs in multiple electric fields, it dynamically allocates the working voltage of each electric field to control the spark flashover frequency based on the real-time flashover frequency, flashover voltage value and dust content at the outlet using a dynamic optimization strategy based on fuzzy control.

[0038] Example 3: This embodiment proposes an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the method described in any embodiment of the present invention.

[0039] Example 4: This embodiment proposes a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the method described in any embodiment of the present invention.

[0040] In this application embodiment, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent the existence of A alone, A and B simultaneously, or B alone. A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, at least one of a, b, and c can represent: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, and c can be single or multiple.

[0041] Those skilled in the art will recognize that the units and algorithm steps described in the embodiments disclosed herein can be implemented using electronic hardware, computer software, or a combination of electronic hardware and software. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0042] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0043] In the several embodiments provided in this application, any function, if implemented as a software functional unit and sold or used as an independent product, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0044] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A method of dynamic coordinated flashover control for an electro-precipitator, characterized by, Includes the following steps: Real-time data collection of dust content at the inlet and outlet of the electrostatic precipitator, as well as the secondary current and secondary voltage of each electric field; Based on the dust content at the inlet and the arrangement order of each electric field along the airflow direction, a gradient flashover frequency setting value is set for each electric field; the change value of dust content at the inlet is detected in real time, and when the change value is not zero, the flashover frequency setting value of each electric field is adaptively adjusted based on the preset dust-frequency response curve. Based on the secondary current and secondary voltage of each electric field, monitor in real time whether spark flashover occurs in the electric field, and obtain the corresponding real-time flashover frequency and flashover voltage value. If a spark flashover occurs in a single electric field, a flashover response control strategy is implemented to adjust the voltage to control the spark flashover frequency. If a spark flashover occurs in multiple electric fields, the operating voltage of each electric field is dynamically allocated to control the spark flashover frequency based on a dynamic optimization strategy based on fuzzy control, according to the real-time flashover frequency, flashover voltage value, and dust content at the outlet of each electric field.

2. A dynamic synergistic flashover control method for an electrostatic precipitator according to claim 1, characterized by, The method sets a gradient flashover frequency setting value for each electric field. Specifically, along the airflow direction inside the electrostatic precipitator, the flashover frequency setting value of the first-stage electric field is the highest, and the flashover frequency setting value of each electric field decreases step by step along the airflow direction according to a preset decreasing range.

3. A dynamic corona synergy flashover control method for an electrostatic precipitator according to claim 1, wherein The flashover response control strategy is specifically as follows: When a spark flashover is detected in a single electric field, the high-voltage power supply output of that electric field is immediately shut off. The charge release time constant of the dust layer in that electric field is used as the restart time of the high-voltage power supply. When the high-voltage power supply shutdown duration reaches the restart time, the high-voltage power supply output is turned on, and the high-voltage power supply of that electric field is controlled to quickly rise to the preset intermediate voltage value. After the voltage is increased to the intermediate voltage value, the high-voltage power supply controlling the electric field is slowly increased to the flashover critical voltage of the electric field.

4. A dynamic corona synergy flashover control method for an electrostatic precipitator according to claim 3, wherein The calculation steps for the preset intermediate voltage value include: When the real-time flashover frequency of a single electric field is less than its flashover frequency set value, the intermediate voltage value is expressed by the formula: ； wherein represents the intermediate voltage value, is an empirical coefficient, represents the flashover point voltage value; When the real-time flashover frequency of a single electric field is greater than or equal to its flashover frequency setpoint, the intermediate voltage value is expressed by the formula: ； In the formula, represents the real-time flashover frequency, represents the flashover frequency setting value.

5. A dynamic corona synergy flashover control method for an electrostatic precipitator according to claim 4, wherein The method further includes calculating the slow boost rate, and when implementing the flashover response control strategy, controlling the high-voltage power supply of the electric field to slowly boost to the flashover critical voltage of the electric field according to the slow boost rate. Specifically: When the real-time flashover frequency of a single electric field is less than its flashover frequency set value, the boost rate is expressed by the formula: ； In the formula, represents the boost rate, represents the boost rate coefficient, represents the boost rate setting value; When the real-time flashover frequency of a single electric field is greater than or equal to its flashover frequency setpoint, the boost rate is expressed by the formula: ； In the formula, represents the real-time flashover frequency, represents the flashover frequency setting value.

6. A dynamic corona synergy flashover control method for an electrostatic precipitator according to claim 1, wherein The method of using a dynamic optimization strategy based on fuzzy control to dynamically allocate the operating voltage of each electric field to control the spark flashover frequency specifically involves adjusting the operating voltage of each electric field, including: For electric fields where the real-time flashover frequency reaches or exceeds the set flashover frequency value, the operating voltage is gradually reduced based on the flashover point voltage of the electric field. The reduction in operating voltage is positively correlated with the degree to which the flashover frequency exceeds the preset flashover frequency value, as expressed by the formula: ； In the formula, represents the reduction amplitude of the operating voltage, represents the real-time flashover frequency, represents the flashover frequency setting value, represents the flashover point voltage value; While reducing the operating voltage of the electric field, the operating voltage of the electric field whose real-time flashover frequency has not reached or exceeded the flashover frequency set value is gradually increased. The voltage rise is expressed by the formula: ； In the formula, represents the voltage boosting amplitude, represents the compensation coefficient, represents the electric field operating voltage before the voltage boosting amplitude is raised; After adjusting the operating voltage of each electric field, continuously monitor the dust content at the outlet of the electrostatic precipitator and correct the compensation coefficient based on the changing trend of the outlet dust content.

7. An electrostatic precipitator dynamic coordinated flashover control system characterized by, include: Data Acquisition Module: Real-time acquisition of dust content at the inlet and outlet of the electrostatic precipitator, as well as secondary current and secondary voltage of each electric field; Parameter setting and adjustment module: Based on the dust content at the inlet and the arrangement order of each electric field along the airflow direction, a gradient flashover frequency setting value is set for each electric field; the change value of dust content at the inlet is detected in real time, and when the change value is not zero, the flashover frequency setting value of each electric field is adaptively adjusted based on the preset dust-frequency response curve. Flashover frequency control module: Real-time monitoring of whether spark flashover occurs in the electric field based on the secondary current and secondary voltage of each electric field, and acquisition of the corresponding real-time flashover frequency and flashover voltage value; If a spark flashover occurs in a single electric field, the flashover response control strategy is executed to adjust the voltage to control the spark flashover frequency. If a spark flashover occurs in multiple electric fields, the operating voltage of each electric field is dynamically allocated to control the spark flashover frequency based on the real-time flashover frequency, flashover voltage value, and dust content at the outlet, using a dynamic optimization strategy based on fuzzy control.

8. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method as described in any one of claims 1 to 6.

9. A computer readable storage medium having stored thereon a computer program, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1 to 6.

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