Intelligent harmonic-suppressed integrated power capacitor compensation system and device

Abstract

The application discloses to the technical field of power capacitor compensation, specifically to an intelligent harmonic suppression integrated power capacitor compensation system and device, first, collecting harmonic, working condition environment and equipment state data, capturing harmonic parameters, power grid working condition fluctuation, environment temperature and humidity and component operation state in full dimension; then, through harmonic source identification and classification and dynamic calculation of reactive power, accurately positioning harmonic dominant source and steady-state / transient reactive power, and combining with equipment operation state, generating customized strategy of sub-harmonic filtering and hierarchical compensation; based on this, the application accurately distinguishes steady-state and transient reactive power gap and different frequency harmonic characteristics, combines power quality prediction and active regulation mechanism, and has dynamic adaptation of compensation strategy.

Description

Technical Field

[0001] This invention relates to the field of power capacitor compensation technology, specifically to an intelligent harmonic suppression integrated power capacitor compensation system and device. Background Technology

[0002] With the large-scale integration of distributed renewable energy (photovoltaics and wind power) and the widespread use of industrial nonlinear loads (frequency converters and welding machines) and civilian electronic equipment, power quality issues in low-voltage distribution networks are becoming increasingly prominent. On the one hand, nonlinear loads generate harmonics of the 2nd to 50th orders, leading to voltage distortion, increased transformer losses, and relay protection malfunctions. On the other hand, the volatility of renewable energy output and the randomness of loads can cause reactive power deficits, resulting in voltage fluctuations, low power factors, and affecting the stable operation of the power grid.

[0003] While existing intelligent low-voltage integrated distribution boxes possess reactive power compensation and harmonic suppression functions, they are limited by structural design and control logic, making them difficult to adapt to complex and ever-changing power grid conditions. Specifically, they suffer from the following problems:

[0004] 1. Insufficient adaptability of compensation response to operating conditions: The response time of existing systems is mostly over 1 second, and they do not distinguish between steady-state and transient reactive power gaps. For example, when a distributed photovoltaic power station is blocked by clouds, its output drops suddenly from 100kW to 20kW, causing a transient reactive power gap. Due to a 1.2-second response lag, the traditional system causes the distribution network voltage to drop by 8%, resulting in the shutdown of sensitive loads such as air conditioners and refrigerators in nearby residents' homes.

[0005] 2. Lack of coordination between environment and equipment status: The heat dissipation and protection functions of existing devices are disconnected from the equipment's operating status, lacking adaptive control. For example, in a certain outdoor distribution box, the fan was running at full load (85W rated power) continuously in a high-temperature and high-humidity environment in summer, but the speed was not dynamically adjusted based on the bus temperature rise data, resulting in an average daily additional energy consumption increase of 2.04kWh; at the same time, the capacitor bulged after one year of operation due to the lack of timely warning of high temperature, causing a compensation interruption. Summary of the Invention

[0006] To address the aforementioned technical problems of insufficient adaptability of compensation response to operating conditions and lack of coordination between environmental and equipment states, this invention provides the following technical solution:

[0007] An intelligent harmonic suppression integrated power capacitor compensation system includes:

[0008] The multi-dimensional sensing module collects data on harmonics, operating conditions, and equipment status, and outputs a full-dimensional sensing dataset containing harmonic parameters, operating conditions parameters, and equipment status parameters.

[0009] The intelligent analysis and decision-making module, based on the full-dimensional perception dataset output by the multi-dimensional perception module, accurately locates the dominant harmonic source and steady-state / transient reactive power through harmonic source identification and classification and dynamic reactive power calculation. Combined with the equipment operating status, it generates a customized initial strategy of sequential filtering + graded compensation, and simultaneously outputs the harmonic source identification results and reactive power analysis results.

[0010] The power quality prediction and active control module, based on the customized initial strategy, harmonic source identification results and reactive power analysis results output by the intelligent analysis and decision module, and relying on the full-dimensional sensing dataset output by the multi-dimensional sensing module, predicts the power quality trend through the LSTM algorithm, pre-adjusts the initial compensation strategy, and then verifies the closed-loop correction through simulation, outputting the verified compensation strategy.

[0011] The precision compensation and harmonic suppression module, based on the empirically validated compensation strategy output by the power quality prediction and active control module, and the harmonic source identification results and reactive power analysis results output by the intelligent analysis and decision-making module, and combined with the full-dimensional sensing dataset output by the multi-dimensional sensing module, implements harmonic suppression and reactive power compensation tasks through millisecond-level switching of composite switches, targeted filtering of harmonics in stages, and hybrid compensation of single-phase and three-phase, and outputs harmonic suppression effect data, reactive power compensation completion data, and real-time equipment execution status data;

[0012] The environmental adaptive control module, based on the full-dimensional sensing dataset output by the multi-dimensional sensing module, adjusts the fan speed, enclosure protection level, and vibration buffer system in a coordinated manner, and outputs environmental control parameters including fan speed parameters and ventilation opening parameters, as well as equipment operating environment data including enclosure protection level parameters and vibration buffer parameters.

[0013] The remote operation and maintenance and collaboration module integrates the full-dimensional perception dataset output by the multi-dimensional perception module, the harmonic source identification results and reactive power analysis results output by the intelligent analysis and decision-making module, the empirically verified compensation strategy output by the power quality prediction and active control module, the harmonic suppression effect data output by the precise compensation and harmonic suppression module, the reactive power compensation completion data, the real-time execution status data of the equipment, and the environmental control parameters and equipment operating environment data output by the environmental adaptive control module. This enables four-remote transmission, and it can predict equipment problems in advance through fault early warning diagnosis. Furthermore, it relies on distributed algorithms to schedule the collaborative work of multiple devices, and simultaneously outputs the integrated four-remote transmission data, fault early warning information and maintenance suggestions, and multi-device collaborative scheduling instructions.

[0014] The precise compensation and harmonic suppression module includes:

[0015] The composite switch switching control unit, based on the empirically verified compensation strategy output by the power quality prediction and active control module, uses a composite switch of a single-chip microcomputer CPU and a magnetic latching relay to achieve millisecond-level switching. At the same time, it receives the full-dimensional sensing dataset output by the multi-dimensional sensing module, dynamically adjusts the switching interval, and outputs real-time execution status data of the device.

[0016] The harmonic filtering unit, based on the harmonic source identification results output by the intelligent analysis and decision module and combined with the empirically verified compensation strategy output by the power quality prediction and active control module, consists of an adjustable inductor, capacitor and damping resistor forming a filtering branch. By adjusting the inductor parameters through thyristors, it accurately filters out specific order harmonics and outputs harmonic suppression effect data.

[0017] The hybrid compensation execution unit, based on the reactive power analysis results output by the intelligent analysis and decision-making module and the empirically verified compensation strategy output by the power quality prediction and active control module, combines single-phase compensation and three-phase compensation. For steady-state reactive power gaps, the three-phase compensation branch is activated; for transient gaps, the single-phase fast compensation branch is activated; and reactive power compensation completion data is output.

[0018] As a preferred embodiment of the intelligent harmonic suppression integrated power capacitor compensation system of the present invention, the multi-dimensional sensing module includes:

[0019] The harmonic precision acquisition unit acquires the amplitude, phase, and frequency of the fundamental wave and harmonics of the three-phase voltage and current through a high-speed sampling chip, and outputs the harmonic parameters.

[0020] The operating condition and environmental parameter acquisition unit collects voltage sags / short-term interruptions, ambient temperature, ambient humidity, vibration parameters, and power grid frequency fluctuations to output operating condition and environmental parameters.

[0021] The real-time equipment status acquisition unit collects data such as the equivalent series resistance of the power capacitor, leakage current, number of composite switch operations, bus temperature rise, and fan operating status to output equipment status parameters.

[0022] As a preferred embodiment of the intelligent harmonic suppression integrated power capacitor compensation system of the present invention, the intelligent analysis and decision-making module includes:

[0023] The harmonic source identification and classification unit, based on the full-dimensional perception dataset output by the multi-dimensional perception module, identifies the harmonic source type and labels the dominant source of each harmonic through fast Fourier transform and support vector machine algorithms, and outputs the harmonic source identification result.

[0024] The reactive power dynamic calculation unit, based on the full-dimensional sensing dataset output by the multi-dimensional sensing module, uses instantaneous reactive power theory to calculate steady-state reactive power and transient reactive power in real time, and outputs reactive power analysis results.

[0025] The compensation strategy optimization generation unit generates a composite strategy of harmonic suppression and hierarchical reactive power compensation based on the harmonic source identification results output by the harmonic source identification and classification unit and the reactive power analysis results output by the reactive power dynamic calculation unit, combined with the full-dimensional perception dataset, so as to output a customized initial strategy.

[0026] As a preferred embodiment of the intelligent harmonic suppression integrated power capacitor compensation system of the present invention, the power quality prediction and active control module includes:

[0027] The power quality trend prediction unit, based on the full-dimensional perception dataset output by the multi-dimensional perception module and the harmonic source identification results and reactive power analysis results output by the intelligent analysis and decision module, uses a long short-term memory network algorithm to predict future changes in key power quality parameters and outputs power quality trend prediction results.

[0028] The proactive strategy pre-adjustment unit, based on the power quality trend prediction results output by the power quality trend prediction unit, pre-corrects the customized initial strategy output by the intelligent analysis and decision-making module and outputs the pre-adjusted compensation strategy.

[0029] The regulation effect simulation verification unit, based on the pre-adjusted compensation strategy output by the active strategy pre-adjustment unit and the full-dimensional perception dataset output by the multi-dimensional perception module, uses digital twin technology to construct a system operation simulation model, simulates the power quality improvement effect after the pre-adjustment strategy is executed, and outputs the verified compensation strategy.

[0030] As a preferred embodiment of the intelligent harmonic suppression integrated power capacitor compensation system of the present invention, the environmental adaptive control module includes:

[0031] The temperature and humidity adaptive heat dissipation unit controls the speed of the 85W fan and links the opening of the cabinet ventilation opening based on the full-dimensional sensing dataset output by the multi-dimensional sensing module, and outputs the fan speed parameters and ventilation opening parameters.

[0032] The protection level dynamic adaptation unit adjusts the enclosure sealing mechanism and outputs enclosure protection level parameters based on the full-dimensional perception dataset output by the multi-dimensional perception module.

[0033] The vibration buffer adjustment unit, based on the full-dimensional sensing dataset output by the multi-dimensional sensing module, activates the vibration buffer system at the bottom of the enclosure and outputs vibration buffer parameters.

[0034] As a preferred embodiment of the intelligent harmonic suppression integrated power capacitor compensation system of the present invention, the remote operation and maintenance and collaboration module includes:

[0035] The four-remote data fusion transmission unit integrates the full-dimensional sensing dataset output by the multi-dimensional sensing module, the harmonic source identification results and reactive power analysis results output by the intelligent analysis and decision-making module, the empirically verified compensation strategy output by the power quality prediction and active control module, the harmonic suppression effect data output by the precise compensation and harmonic suppression module, the reactive power compensation completion data, the real-time execution status data of the equipment, and the environmental control parameters and equipment operating environment data output by the environmental adaptive control module. After integration, it realizes telemetry, remote control, remote signaling, and remote adjustment through 5G / Ethernet, and outputs the fused four-remote transmission data.

[0036] The fault early warning and diagnosis unit establishes a fault diagnosis model based on the full-dimensional perception dataset output by the multi-dimensional perception module, the harmonic suppression effect data output by the precise compensation and harmonic suppression module, the reactive power compensation completion data, and the real-time execution status data of the equipment. It provides early warning of faults and generates maintenance suggestions, outputting fault early warning information and maintenance suggestions.

[0037] The multi-device collaborative scheduling unit, based on the fused remote data transmission data output by the remote data fusion transmission unit, allocates harmonic suppression and reactive power compensation tasks to each device through a distributed collaborative algorithm, and outputs multi-device collaborative scheduling instructions.

[0038] An intelligent harmonic suppression integrated power capacitor compensation device includes a housing, in which the aforementioned intelligent harmonic suppression integrated power capacitor compensation system is installed.

[0039] Compared with existing technologies:

[0040] 1. By accurately distinguishing between steady-state and transient reactive power gaps and harmonic characteristics of different frequencies, and combining power quality prediction and active control mechanisms, it can dynamically adapt compensation strategies. In response to complex operating conditions such as sudden changes in grid load and fluctuations in renewable energy output, it can predict demand changes in advance and pre-adjust compensation resources, avoiding the adaptation deviation caused by the "passive response" of traditional solutions. At the same time, relying on hybrid compensation execution and composite switch switching control, it can accurately synchronize compensation actions with changes in operating conditions, meeting the reactive power supply needs under different scenarios, and avoiding the problems of untimely response or over-compensation caused by fixed strategies, thus comprehensively improving the flexibility and accuracy of operating condition adaptation.

[0041] 2. By establishing a deep linkage mechanism between environmental parameters and equipment operating status, the system enables protection, heat dissipation, and buffering functions to coordinate with environmental changes and equipment operating conditions in real time. Based on data such as environmental temperature, humidity, vibration, and dust, the system dynamically adjusts the enclosure protection level, fan operating status, and buffer device parameters, ensuring the safe operation of the equipment in complex outdoor environments while avoiding functional redundancy or insufficiency. Simultaneously, the status data of key equipment components is used to reverse-optimize environmental adaptation strategies, forming a closed loop of "environmental perception - status feedback - strategy adjustment." This completely breaks the limitations of traditional devices where environmental adaptation and equipment operation are disconnected, allowing the system to maintain stable and efficient operation under various operating conditions. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the overall framework of the present invention;

[0043] Figure 2 This is a schematic diagram of the multi-dimensional sensing module framework of the present invention;

[0044] Figure 3 This is a schematic diagram of the intelligent analysis and decision-making module framework of the present invention;

[0045] Figure 4 This is a schematic diagram of the power quality prediction and active control module framework of the present invention;

[0046] Figure 5 This is a schematic diagram of the precision compensation and harmonic suppression module framework of the present invention;

[0047] Figure 6 This is a schematic diagram of the environmental adaptive control module framework of the present invention;

[0048] Figure 7 This is a schematic diagram of the remote operation and maintenance and collaboration module framework of the present invention. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0050] This invention provides an intelligent harmonic suppression integrated power capacitor compensation system. Please refer to [link / reference]. Figure 1 ,include:

[0051] The multi-dimensional sensing module is used to collect data on harmonics, operating conditions, and equipment status to capture harmonic parameters, power grid fluctuations, ambient temperature and humidity, and component operating status in all dimensions.

[0052] The intelligent analysis and decision-making module is used to accurately locate the dominant harmonic source and steady-state / transient reactive power through harmonic source identification and classification and dynamic calculation of reactive power, and generate customized strategies of sequential filtering and graded compensation in combination with equipment operating status.

[0053] The power quality prediction and active control module is used to predict power quality trends based on historical and real-time data and through the LSTM algorithm. It pre-adjusts the initial compensation strategy and then verifies the closed-loop correction through simulation, realizing the leap from passive response to active prediction and avoiding the risks of harmonic exceedance and reactive power imbalance in advance.

[0054] The precision compensation and harmonic suppression module is used to accurately implement harmonic suppression and reactive power compensation tasks based on the optimized strategy through millisecond-level switching of composite switches, targeted filtering of harmonics in stages, and hybrid compensation of single-phase and three-phase. At the same time, it provides feedback on the execution status to form a closed-loop control, ensuring the efficient implementation of power quality regulation.

[0055] The environmental adaptive control module is used to link environmental parameters with equipment operating status, dynamically adjust fan speed, enclosure protection level and vibration buffer system to optimize equipment operating environment, enhance outdoor working condition adaptability, ensure stable and reliable operation of system under extreme temperature, humidity and vibration conditions, and extend component service life.

[0056] The remote operation and maintenance and collaboration module is used to integrate data from various modules to achieve remote transmission in four areas. It also predicts equipment problems in advance through fault early warning and diagnosis, and relies on distributed algorithms to schedule multiple devices to work together, avoiding compensation blind spots and overcompensation, reducing operation and maintenance costs, and improving the overall control efficiency of the regional power grid.

[0057] Please see Figure 2 The multidimensional sensing module includes:

[0058] The harmonic precision acquisition unit is used to acquire the amplitude, phase, and frequency of the fundamental wave and the 2nd to 50th harmonics of three-phase voltage and current based on a high-speed sampling chip (sampling frequency ≥ 2kHz), with a sampling accuracy ≤ 0.5%.

[0059] The operating condition and environmental parameter acquisition unit is used to collect voltage sags / short-term interruptions (compliant with GB / T15576-2020 standard), ambient temperature (-40℃~85℃), ambient humidity (0~95%RH), vibration parameters (sinusoidal vibration, compliant with GB / T2423.10-2019), and simultaneously monitor power grid frequency fluctuations (49.5Hz~50.5Hz).

[0060] The real-time equipment status acquisition unit is used to collect data such as the equivalent series resistance (ESR) of power capacitors, leakage current, number of composite switch operations, bus temperature rise, and fan operating status, so as to assess component life based on these parameters.

[0061] Please see Figure 3 The intelligent analysis and decision-making module includes:

[0062] The harmonic source identification and classification unit is used to identify the type of harmonic source (linear / nonlinear load, such as photovoltaic inverter, frequency converter, welding machine) based on the harmonic data of the multidimensional sensing module through Fast Fourier Transform (FFT) and Support Vector Machine (SVM) algorithms, and to label the dominant source of each harmonic.

[0063] The reactive power dynamic calculation unit is used to combine the voltage and current data and operating condition data of the multi-dimensional sensing module, and adopt the instantaneous reactive power theory to calculate the steady-state reactive power (long-term load consumption) and transient reactive power (new energy fluctuations and load sudden changes) in real time, with a calculation cycle of ≤10ms.

[0064] The compensation strategy optimization generation unit is used to generate a composite strategy of harmonic suppression and graded reactive power compensation based on the harmonic classification of the harmonic source identification and classification unit and the reactive power calculation results of the reactive power dynamic calculation unit. For characteristic harmonics such as the 3rd, 5th, and 7th harmonics, dedicated filtering branches are enabled. The steady-state reactive power gap is compensated by three phases, and the transient gap is compensated by single-phase fast compensation. Combined with equipment status data, excessive load is avoided on aging capacitors.

[0065] Please see Figure 4 The power quality prediction and active control module includes:

[0066] The power quality trend prediction unit integrates historical data collected by the multi-dimensional sensing module (harmonic amplitude, reactive power fluctuation, and environmental parameters over the past 72 hours) with the real-time classification and calculation results from the intelligent analysis and decision-making module. It employs a Long Short-Term Memory (LSTM) algorithm to predict changes in key power quality parameters within the next 15 minutes: the growth trend of harmonic amplitudes (e.g., whether the 5th harmonic will exceed the threshold); the peak value and duration of steady-state / transient reactive power deficits; and the impact of environmental parameters (e.g., high temperature and high humidity) on equipment compensation efficiency.

[0067] The proactive strategy pre-adjustment unit is used to pre-correct the initial compensation strategy generated by the intelligent analysis and decision-making module based on the prediction results of the power quality trend prediction unit: if it is predicted that the 5th harmonic will exceed the standard during a certain period, the corresponding sub-filter branch will be activated in advance and the inductor parameters will be pre-adjusted; if it is predicted that the photovoltaic output will drop sharply and cause a transient reactive power gap, the single-phase compensation capacity will be reserved in advance to shorten the "preparation time" of the switching response; if it is predicted that the ambient temperature will rise to 60°C, the wind turbine speed will be increased in advance to cool down the compensation components and avoid the high temperature from affecting the compensation efficiency.

[0068] The control effect simulation verification unit is used to construct a system operation simulation model based on the pre-adjustment strategy of the active strategy pre-adjustment unit and the equipment status data of the multi-dimensional sensing module using digital twin technology. This model simulates the power quality improvement effect (such as harmonic suppression rate and reactive power compensation accuracy) after the pre-adjustment strategy is executed. If the simulation results do not meet expectations (such as the risk of harmonic exceedance still exists), the results are fed back to the prediction unit of the power quality trend prediction unit to correct the prediction model parameters. At the same time, the pre-adjustment strategy of the active strategy pre-adjustment unit is adjusted to form a closed loop of "prediction-pre-adjustment-simulation-correction".

[0069] Please see Figure 5 The precise compensation and harmonic suppression module includes:

[0070] The composite switch switching control unit is used for composite switches that employ a single-chip microcomputer CPU and a magnetic latching relay. Based on the strategy of the power quality prediction and active control module, it achieves millisecond-level switching (response time ≤20ms) and dynamically adjusts the switching interval by using the switching action count data of the multi-dimensional sensing module to avoid contact wear.

[0071] The harmonic filtering unit consists of an adjustable inductor, capacitor, and damping resistor forming a filtering branch. Based on the harmonic identification results of the intelligent analysis and decision module, it uses thyristors to adjust the inductor parameters to accurately filter out specific harmonics (filtering efficiency ≥ 92%).

[0072] The hybrid compensation execution unit combines single-phase and three-phase compensation. Based on the reactive power calculation results of the intelligent analysis and decision module, it enables the three-phase compensation branch (30kvar~150kvar) for steady-state reactive power gap (fluctuation ≤5%) and the single-phase fast compensation branch (31.5A single-phase current) for transient gap (fluctuation >5%) to avoid overcompensation.

[0073] Please see Figure 6 The environmental adaptive control module includes:

[0074] The temperature and humidity adaptive heat dissipation unit is used to control the speed of the 85W fan based on the ambient temperature and bus temperature rise data of the multi-dimensional sensing module: low speed (3000r / min) when the temperature is <40℃, medium speed (4500r / min) when the temperature is 40℃~60℃, and high speed (6000r / min) when the temperature is >60℃, while also linking the opening of the enclosure ventilation opening;

[0075] The protection level dynamic adaptation unit is used to adjust the enclosure sealing mechanism according to the humidity data of the multi-dimensional sensing module: when the humidity is <60%RH, IP44 protection (ventilation priority) is adopted, and when the humidity is ≥60%RH, it switches to IP45 protection (sealing priority). Specifically, the sealing is dynamically adjusted based on the control of the valve system. The enclosure is made of 304 stainless steel plate (document material) + epoxy powder coating to enhance corrosion resistance.

[0076] The vibration buffer adjustment unit is used to activate the vibration buffer system (preferably an adjustable damping spring shock absorber) at the bottom of the enclosure based on the vibration data from the multi-dimensional sensing module. When the vibration acceleration is greater than 5 m / s², the buffer stroke is increased to 20 mm to reduce the impact of vibration on precision components such as capacitors and switches.

[0077] Please see Figure 7 The remote operation and maintenance and collaboration module includes:

[0078] The four-remote data fusion transmission unit is used to integrate the sensing data of the multi-dimensional sensing module, the analysis data of the intelligent analysis and decision-making module, the control data of the power quality prediction and active control module, the execution data of the precise compensation and harmonic suppression module, and the adaptation data of the environmental adaptive control module. It realizes telemetry, remote control, remote signaling, and remote adjustment through 5G / Ethernet, with a data transmission delay of ≤50ms.

[0079] The fault early warning and diagnosis unit is used to establish a fault diagnosis model based on the equipment status data of the multi-dimensional sensing module and the execution data of the precision compensation and harmonic suppression module. It can provide early warnings for faults such as capacitor aging (ESR > 15% of rated value), switch failure (failure rate > 3%), and bus overheating (temperature rise > 80K) 30 days in advance, and generate maintenance suggestions.

[0080] The multi-device collaborative scheduling unit is used to allocate harmonic suppression and reactive power compensation tasks to each device based on the transmission data of the four-remote data fusion transmission unit of multiple devices in the area, through a distributed collaborative algorithm, to avoid duplicate compensation or compensation blind spots. For example, device A is responsible for suppressing the 5th harmonic, and device B is responsible for filling the transient reactive power gap. After collaboration, the total harmonic distortion rate of the area is ≤5%, and the power factor is stable at 0.95~1.0.

[0081] An intelligent harmonic suppression integrated power capacitor compensation device includes a housing, in which the aforementioned intelligent harmonic suppression integrated power capacitor compensation system is installed.

[0082] In practical use, the steps are as follows:

[0083] S1, Multi-dimensional sensing: Collects data on harmonics, operating environment, and equipment status to capture harmonic parameters, power grid fluctuations, ambient temperature and humidity, and component operating status in all dimensions.

[0084] S2, Intelligent Analysis and Decision-Making: Through harmonic source identification and classification, dynamic calculation of reactive power, it accurately locates the dominant harmonic source and steady-state / transient reactive power, and generates a customized strategy of sequential filtering + graded compensation in combination with equipment operating status.

[0085] S3, Power Quality Prediction and Active Control: Based on historical and real-time data, the power quality trend is predicted through the LSTM algorithm, the initial compensation strategy is pre-adjusted, and then closed-loop correction is verified by simulation, realizing the leap from passive response to active prediction, and avoiding the risks of harmonic exceedance and reactive power imbalance in advance.

[0086] S4, Precise Compensation and Harmonic Suppression: Based on the optimized strategy, through millisecond-level switching of composite switches, targeted filtering of harmonics, and hybrid compensation of single-phase and three-phase, the task of harmonic suppression and reactive power compensation is precisely implemented. At the same time, the execution status is fed back to form a closed-loop control, ensuring the efficient implementation of power quality regulation.

[0087] S5, Environmental Adaptive Control: Links environmental parameters with equipment operating status, dynamically adjusts fan speed, enclosure protection level and vibration buffer system to optimize equipment operating environment, enhance outdoor working condition adaptability, ensure stable and reliable operation of the system under extreme temperature, humidity and vibration conditions, and extend component service life.

[0088] S6, Remote Operation and Collaboration: It integrates data from each step to achieve four-way remote transmission, and predicts equipment problems in advance through fault early warning diagnosis. It also relies on distributed algorithms to schedule multiple devices to work collaboratively, avoiding compensation blind spots and overcompensation, reducing operation and maintenance costs, and improving the overall control efficiency of the regional power grid.

[0089] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the invention. In particular, as long as there is no structural conflict, the features in the disclosed embodiments can be combined with each other in any manner. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An intelligent harmonic suppression integrated power capacitor compensation system, characterized in that, include: The multi-dimensional sensing module collects data on harmonics, operating conditions, and equipment status, and outputs a full-dimensional sensing dataset containing harmonic parameters, operating conditions parameters, and equipment status parameters. The intelligent analysis and decision-making module, based on the full-dimensional perception dataset output by the multi-dimensional perception module, accurately locates the dominant harmonic source and steady-state / transient reactive power through harmonic source identification and classification and dynamic reactive power calculation. Combined with the equipment operating status, it generates a customized initial strategy of sequential filtering + graded compensation, and simultaneously outputs the harmonic source identification results and reactive power analysis results. The power quality prediction and active control module, based on the customized initial strategy, harmonic source identification results and reactive power analysis results output by the intelligent analysis and decision module, and relying on the full-dimensional sensing dataset output by the multi-dimensional sensing module, predicts the power quality trend through the LSTM algorithm, pre-adjusts the initial compensation strategy, and then verifies the closed-loop correction through simulation, outputting the verified compensation strategy. The precision compensation and harmonic suppression module, based on the empirically validated compensation strategy output by the power quality prediction and active control module, and the harmonic source identification results and reactive power analysis results output by the intelligent analysis and decision-making module, and combined with the full-dimensional sensing dataset output by the multi-dimensional sensing module, implements harmonic suppression and reactive power compensation tasks through millisecond-level switching of composite switches, targeted filtering of harmonics in stages, and hybrid compensation of single-phase and three-phase, and outputs harmonic suppression effect data, reactive power compensation completion data, and real-time equipment execution status data; The environmental adaptive control module, based on the full-dimensional sensing dataset output by the multi-dimensional sensing module, adjusts the fan speed, enclosure protection level, and vibration buffer system in a coordinated manner, and outputs environmental control parameters including fan speed parameters and ventilation opening parameters, as well as equipment operating environment data including enclosure protection level parameters and vibration buffer parameters. The remote operation and maintenance and collaboration module integrates the full-dimensional perception dataset output by the multi-dimensional perception module, the harmonic source identification results and reactive power analysis results output by the intelligent analysis and decision-making module, the empirically verified compensation strategy output by the power quality prediction and active control module, the harmonic suppression effect data output by the precise compensation and harmonic suppression module, the reactive power compensation completion data, the real-time execution status data of the equipment, and the environmental control parameters and equipment operating environment data output by the environmental adaptive control module. This enables four-remote transmission, and it can predict equipment problems in advance through fault early warning diagnosis. Furthermore, it relies on distributed algorithms to schedule the collaborative work of multiple devices, and simultaneously outputs the integrated four-remote transmission data, fault early warning information and maintenance suggestions, and multi-device collaborative scheduling instructions. The precise compensation and harmonic suppression module includes: The composite switch switching control unit, based on the empirically verified compensation strategy output by the power quality prediction and active control module, uses a composite switch of a single-chip microcomputer CPU and a magnetic latching relay to achieve millisecond-level switching. At the same time, it receives the full-dimensional sensing dataset output by the multi-dimensional sensing module, dynamically adjusts the switching interval, and outputs real-time execution status data of the device. The harmonic filtering unit, based on the harmonic source identification results output by the intelligent analysis and decision module and combined with the empirically verified compensation strategy output by the power quality prediction and active control module, consists of an adjustable inductor, capacitor and damping resistor forming a filtering branch. By adjusting the inductor parameters through thyristors, it accurately filters out specific order harmonics and outputs harmonic suppression effect data. The hybrid compensation execution unit, based on the reactive power analysis results output by the intelligent analysis and decision-making module and the empirically verified compensation strategy output by the power quality prediction and active control module, combines single-phase compensation and three-phase compensation. For steady-state reactive power gaps, the three-phase compensation branch is activated; for transient gaps, the single-phase fast compensation branch is activated; and reactive power compensation completion data is output.

2. The intelligent harmonic suppression integrated power capacitor compensation system according to claim 1, characterized in that, The multi-dimensional sensing module includes: The harmonic precision acquisition unit acquires the amplitude, phase, and frequency of the fundamental wave and harmonics of the three-phase voltage and current through a high-speed sampling chip, and outputs the harmonic parameters. The operating condition and environmental parameter acquisition unit collects voltage sags / short-term interruptions, ambient temperature, ambient humidity, vibration parameters, and power grid frequency fluctuations to output operating condition and environmental parameters. The real-time equipment status acquisition unit collects data such as the equivalent series resistance of the power capacitor, leakage current, number of composite switch operations, bus temperature rise, and fan operating status to output equipment status parameters.

3. The intelligent harmonic suppression integrated power capacitor compensation system according to claim 1, characterized in that, The intelligent analysis and decision-making module includes: The harmonic source identification and classification unit, based on the full-dimensional perception dataset output by the multi-dimensional perception module, identifies the harmonic source type and labels the dominant source of each harmonic through fast Fourier transform and support vector machine algorithms, and outputs the harmonic source identification result. The reactive power dynamic calculation unit, based on the full-dimensional sensing dataset output by the multi-dimensional sensing module, uses instantaneous reactive power theory to calculate steady-state reactive power and transient reactive power in real time, and outputs reactive power analysis results. The compensation strategy optimization generation unit generates a composite strategy of harmonic suppression and hierarchical reactive power compensation based on the harmonic source identification results output by the harmonic source identification and classification unit and the reactive power analysis results output by the reactive power dynamic calculation unit, combined with the full-dimensional perception dataset, so as to output a customized initial strategy.

4. The intelligent harmonic suppression integrated power capacitor compensation system according to claim 1, characterized in that, The power quality prediction and active control module includes: The power quality trend prediction unit, based on the full-dimensional perception dataset output by the multi-dimensional perception module and the harmonic source identification results and reactive power analysis results output by the intelligent analysis and decision module, uses a long short-term memory network algorithm to predict future changes in key power quality parameters and outputs power quality trend prediction results. The proactive strategy pre-adjustment unit, based on the power quality trend prediction results output by the power quality trend prediction unit, pre-corrects the customized initial strategy output by the intelligent analysis and decision-making module and outputs the pre-adjusted compensation strategy. The regulation effect simulation verification unit, based on the pre-adjusted compensation strategy output by the active strategy pre-adjustment unit and the full-dimensional perception dataset output by the multi-dimensional perception module, uses digital twin technology to construct a system operation simulation model, simulates the power quality improvement effect after the pre-adjustment strategy is executed, and outputs the verified compensation strategy.

5. The intelligent harmonic suppression integrated power capacitor compensation system according to claim 1, characterized in that, The environmental adaptive control module includes: The temperature and humidity adaptive heat dissipation unit controls the speed of the 85W fan and links the opening of the cabinet ventilation opening based on the full-dimensional sensing dataset output by the multi-dimensional sensing module, and outputs the fan speed parameters and ventilation opening parameters. The protection level dynamic adaptation unit adjusts the enclosure sealing mechanism and outputs enclosure protection level parameters based on the full-dimensional perception dataset output by the multi-dimensional perception module. The vibration buffer adjustment unit, based on the full-dimensional sensing dataset output by the multi-dimensional sensing module, activates the vibration buffer system at the bottom of the enclosure and outputs vibration buffer parameters.

6. The intelligent harmonic suppression integrated power capacitor compensation system according to claim 1, characterized in that, The remote operation and maintenance and collaboration module includes: The four-remote data fusion transmission unit integrates the full-dimensional sensing dataset output by the multi-dimensional sensing module, the harmonic source identification results and reactive power analysis results output by the intelligent analysis and decision-making module, the empirically verified compensation strategy output by the power quality prediction and active control module, the harmonic suppression effect data output by the precise compensation and harmonic suppression module, the reactive power compensation completion data, the real-time execution status data of the equipment, and the environmental control parameters and equipment operating environment data output by the environmental adaptive control module. After integration, it realizes telemetry, remote control, remote signaling, and remote adjustment through 5G / Ethernet, and outputs the fused four-remote transmission data. The fault early warning and diagnosis unit establishes a fault diagnosis model based on the full-dimensional perception dataset output by the multi-dimensional perception module, the harmonic suppression effect data output by the precise compensation and harmonic suppression module, the reactive power compensation completion data, and the real-time execution status data of the equipment. It provides early warning of faults and generates maintenance suggestions, outputting fault early warning information and maintenance suggestions. The multi-device collaborative scheduling unit, based on the fused remote data transmission data output by the remote data fusion transmission unit, allocates harmonic suppression and reactive power compensation tasks to each device through a distributed collaborative algorithm, and outputs multi-device collaborative scheduling instructions.

7. An intelligent harmonic suppression integrated power capacitor compensation device, characterized in that, The system includes a housing, wherein the housing is equipped with the intelligent harmonic suppression integrated power capacitor compensation system as described in any one of claims 1-6.

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