Electric energy quality intelligent platform

Abstract

The invention relates to the field of electric energy quality detection, and discloses an electric energy quality intelligent platform, and the key points of the technical scheme are that the platform comprises an electric energy quality collection module which is used for collecting the law data of the electric energy quality of a supply side, and the power utilization law data and power utilization requirement data of a power utilization side; the data analyzing and processing module is connected with the electric energy quality acquisition module and is used for analyzing and processing the supply side electric energy quality rule data, the electricity utilization rule data of the electricity utilization side and the electricity utilization requirement data so as to determine an electric energy quality evaluation standard and an electricity utilization time planning strategy; the electric energy quality regulation and control module is connected with the data analysis and processing module, and is used for regulating the supply of the electric energy quality when the electric energy quality is poorer than the power utilization requirement data through analysis and processing; and the storage module is connected with the data analysis and processing module and is used for storing the power quality rule data of the supply side, the power utilization rule data of the power utilization side, the power utilization requirement data, the power quality evaluation standard and the power utilization time planning strategy.

Description

Technical Field

[0001] The present invention relates to the field of power quality detection, and more specifically to an intelligent power quality platform. Background Art

[0002] Power quality, in a general sense, refers to the quality of power supply, including voltage quality, current quality, power supply quality and power consumption quality. Ideal power should be a perfectly symmetrical sine wave. Some factors can cause the waveform to deviate from the symmetrical sine, thus causing power quality problems. Power quality problems can be defined as: deviations in voltage, current or frequency that cause electrical equipment to fail or not work properly, including frequency deviation, voltage deviation, voltage fluctuation and flicker, three-phase imbalance, temporary or transient overvoltage, waveform distortion (harmonics), voltage sag, interruption, temporary swell and power supply continuity.

[0003] With the development of modern industry and power systems, power quality issues are receiving increasing attention. The quality of power transmitted from power stations is often uneven, such as voltage fluctuations, frequency deviations, harmonic pollution, etc. These power quality issues will have a serious impact on the normal operation and service life of electrical equipment, leading to equipment failures, reduced efficiency, and even damage. In some places with high requirements for power quality, such as precision electronic manufacturing plants and data centers, power quality issues may cause significant losses such as production interruptions and data loss.

[0004] Traditional power quality monitoring and control methods are often relatively simple and passive, making it difficult to achieve comprehensive evaluation and intelligent control of power quality. Therefore, it is necessary to develop a platform that can collect relevant data from the supply side and the power consumption side, conduct comprehensive analysis and processing, and realize intelligent control of power quality and reasonable planning of power consumption time, so as to improve the utilization efficiency of electricity and ensure the safe and stable operation of power consumption equipment. Summary of the invention

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide an intelligent power quality platform for solving the problems of uneven power quality on the power consumption side affecting the service life of equipment and the deficiencies of traditional control methods.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An intelligent power quality platform, comprising:

[0008] The power quality collection module is used to collect regularity data of power quality on the supply side and power consumption regularity data and power consumption requirement data on the power consumption side;

[0009] A data analysis and processing module, connected to the power quality acquisition module, for analyzing and processing the power quality law data on the supply side, the power consumption law data on the power consumption side and the power consumption requirement data, so as to determine the power quality evaluation standard and the power consumption time planning strategy;

[0010] A power quality control module is connected to the data analysis and processing module, and is used to adjust the power quality supply when the analysis and processing show that the power quality is worse than the power requirement data;

[0011] A storage module is connected to the data analysis and processing module and is used to store the supply-side power quality law data, the power consumption law data on the power consumption side, the power consumption requirement data, the power quality assessment standard and the power consumption time planning strategy.

[0012] In the present invention, preferably, the data analysis and processing module uses the following method to evaluate the power quality:

[0013] Based on voltage stability assessment: calculate the voltage deviation rate, that is, the difference between the actual voltage value and the rated voltage value divided by the percentage of the rated voltage value. When the voltage deviation rate exceeds the preset voltage deviation threshold range, it is determined that the voltage stability does not meet the requirements; at the same time, analyze the voltage fluctuation situation and calculate the difference between the maximum and minimum voltage values ​​in a short period of time. If the difference exceeds the set voltage fluctuation threshold, the voltage fluctuation is considered abnormal;

[0014] Based on frequency stability assessment: monitor the actual frequency value and calculate the frequency deviation, that is, the difference between the actual frequency value and the rated frequency value. If the frequency deviation exceeds the preset frequency deviation threshold, the frequency stability is judged to be substandard;

[0015] Assessment based on harmonic content: Use the harmonic analysis algorithm to perform harmonic analysis on the collected current or voltage signal to determine the amplitude and content of each harmonic. When the amplitude of a specific harmonic exceeds the set harmonic amplitude threshold or the total harmonic distortion rate exceeds the preset total harmonic distortion rate threshold, it is determined that the harmonic content exceeds the standard.

[0016] In the present invention, preferably, the power quality control module includes:

[0017] The power quality adjustment unit, when detecting that the power quality is lower than the evaluation standard, adjusts the power quality by adjusting the reactive compensation device of the power equipment, the filter or connecting an external power generation device to make it meet the power consumption requirements; the external power generation device has the function of adjusting the output voltage, frequency and phase, and can dynamically adjust the output parameters according to the deviation of the power quality to compensate for the power quality defects.

[0018] In the present invention, preferably, the power quality acquisition module includes:

[0019] The supply-side power quality collection unit is used to collect regular data on the power quality parameters of the power transmitted from the power station over time, wherein the power quality parameters include voltage stability, frequency stability, and harmonic content;

[0020] The power consumption pattern collection unit on the power consumption side is used to collect power consumption pattern data such as power consumption, power consumption, type and quantity of power consumption equipment in different time periods on the power consumption side;

[0021] The power consumption requirement collection unit is used to collect the power quality requirement data of the power consumption side, including the allowable voltage fluctuation range, frequency deviation range, and harmonic limit.

[0022] In the present invention, preferably, the data analysis and processing module includes:

[0023] An evaluation standard determination unit, which determines the evaluation standard of power quality, including qualified thresholds of various power quality parameters, according to the supply-side power quality law data and the power demand data;

[0024] The electricity usage time planning unit formulates an electricity usage time planning strategy based on the electricity usage law data and electricity usage requirement data on the electricity usage side. The electricity usage time planning strategy includes a plurality of pre-configured electricity usage plans. The electricity usage plan includes the electricity usage time and electricity usage requirement data of each user on the electricity usage side. The electricity usage score of each electricity usage plan is calculated respectively. The electricity usage score is used to evaluate the electricity usage quality of the electricity usage plan. The electricity usage plan with the highest electricity usage score is used as the recommended electricity usage plan.

[0025] In the present invention, preferably, the power quality control module includes:

[0026] The power quality adjustment unit, when it is detected that the power quality is lower than the evaluation standard, adjusts the power quality by adjusting the power equipment such as reactive power compensation device, filter, etc. to make it meet the power demand;

[0027] The electric energy temporary storage unit stores the excess electric energy in the energy storage device when the power demand on the power consumption side is less than the demand threshold, so as to release it for use when the power quality decreases or when the power consumption is at a peak.

[0028] In the present invention, preferably, a communication module is used to realize data communication between the intelligent power quality platform and external equipment such as a power station monitoring system and a power-consuming equipment control system, so as to obtain and transmit power quality-related information and control instructions in real time.

[0029] In the present invention, preferably, a display and alarm module is connected to the data analysis and processing module, and is used to display the power quality assessment results, power usage time planning information, and to send out an alarm signal when the power quality is abnormal, so as to remind the staff to handle it.

[0030] Beneficial effects of the present invention:

[0031] The power quality intelligent platform of the present invention collects relevant data from the supply side and the power consumption side, performs comprehensive analysis and processing, and realizes intelligent evaluation of power quality, reasonable planning of power consumption time, and effective regulation of power quality. It can improve the utilization efficiency of electric energy, reduce the damage of power quality problems to power consumption equipment, and ensure the safe and stable operation of the power system. It has broad application prospects and significant economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a structural block diagram of the intelligent power quality platform in this embodiment. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] Please refer to Figure 1 , an intelligent power quality platform, comprising:

[0037] The power quality collection module is used to collect regularity data of power quality on the supply side and power consumption regularity data and power consumption requirement data on the power consumption side;

[0038] A data analysis and processing module, connected to the power quality acquisition module, for analyzing and processing the power quality law data on the supply side, the power consumption law data on the power consumption side and the power consumption requirement data, so as to determine the power quality evaluation standard and the power consumption time planning strategy;

[0039] A power quality control module is connected to the data analysis and processing module, and is used to adjust the power quality supply when the analysis and processing show that the power quality is worse than the power requirement data;

[0040] A storage module is connected to the data analysis and processing module and is used to store the supply-side power quality law data, the power consumption law data on the power consumption side, the power consumption requirement data, the power quality assessment standard and the power consumption time planning strategy.

[0041] Power quality acquisition module:

[0042] Supply-side power quality acquisition unit: Use high-precision power quality monitoring instruments to monitor key power quality parameters such as voltage stability, frequency stability, and harmonic content of the power transmitted from the power station in real time, and record the regular data of its changes over time. For example, voltage and current signals are collected through sensors such as voltage transformers and current transformers, and then various power quality parameters are calculated using signal processing circuits and microprocessors.

[0043] Power consumption pattern collection unit on the power consumption side: Install smart meters and other equipment on the power consumption side to collect information such as power consumption, power consumption, type and quantity of power consumption equipment in different time periods. These data can reflect the power consumption pattern on the power consumption side, such as which time periods are peak power consumption and which equipment is the main energy-consuming equipment.

[0044] Power consumption requirement collection unit: through the human-computer interaction interface or communication with the power consumption equipment control system, obtain the specific requirements of the power consumption side for power quality, including the allowable voltage fluctuation range, frequency deviation range, harmonic limit, etc.

[0045] Data analysis and processing module:

[0046] Evaluation standard determination unit: Receives the supply-side power quality law data and power demand data collected by the power quality acquisition module, and uses data statistical analysis and algorithm models to determine the power quality evaluation standard applicable to the power consumption side. For example, the voltage qualification threshold is determined based on the sensitivity of the power consumption equipment to voltage fluctuations; the limit standard of harmonic content is determined based on the impact of harmonics on different types of equipment.

[0047] Power consumption time planning unit: Based on the power consumption law data and power consumption requirement data provided by the power consumption law collection unit on the power consumption side, an optimization algorithm is used to formulate a power consumption time planning strategy, the power consumption time planning strategy includes a number of pre-configured power consumption plans, the power consumption plan includes the power consumption time and power consumption requirement data of each power consumption side user, and the power consumption score of each power consumption plan is calculated respectively. The power consumption score is used to evaluate the power consumption quality of the power consumption plan, and the power consumption plan with the highest power consumption score is used as the recommended power consumption plan. For example, equipment with low requirements for power quality is arranged to operate in a time period with relatively poor power quality, while equipment that is sensitive to power quality is arranged to operate in a time period with better power quality, so as to achieve reasonable allocation and utilization of electric energy and reduce the impact of power quality fluctuations on equipment.

[0048] Among them, this module uses the following specific methods to evaluate the power quality:

[0049] Based on voltage stability assessment: calculate the voltage deviation rate, that is, the difference between the actual voltage value and the rated voltage value divided by the percentage of the rated voltage value. When the voltage deviation rate exceeds the preset voltage deviation threshold range, it is determined that the voltage stability does not meet the requirements; at the same time, analyze the voltage fluctuation situation and calculate the difference between the maximum and minimum voltage values ​​in a short period of time. If the difference exceeds the set voltage fluctuation threshold, it is determined that the voltage fluctuation is abnormal. For example, for general industrial electricity, the voltage deviation threshold range can be set to ±5%, and the voltage fluctuation threshold can be set to 5V.

[0050] Based on frequency stability assessment: monitor the actual frequency value, calculate the frequency deviation, that is, the difference between the actual frequency value and the rated frequency value. If the frequency deviation exceeds the preset frequency deviation threshold, the frequency stability is judged to be substandard. Usually, the rated frequency of the power system is 50Hz or 60Hz, and the frequency deviation threshold can be set to ±0.2Hz.

[0051] Based on harmonic content assessment: Use the harmonic analysis algorithm to perform harmonic analysis on the collected current or voltage signal to determine the amplitude and content of each harmonic. When the amplitude of a specific harmonic (such as the 3rd, 5th, 7th, etc.) exceeds the set harmonic amplitude threshold or the total harmonic distortion rate exceeds the preset total harmonic distortion rate threshold, the harmonic content is determined to be excessive. For example, for some equipment that is sensitive to harmonics, the 3rd harmonic amplitude threshold can be set to 5% of the fundamental amplitude, and the total harmonic distortion rate threshold can be set to 5%.

[0052] Power quality control module:

[0053] Power quality adjustment unit: When the data analysis and processing module determines that the power quality is lower than the evaluation standard, the power quality adjustment unit is started. It adjusts the power quality by controlling the reactive compensation device, filter and other power equipment connected to the power line, or connecting to an external power generation device. The external power generation device has the function of adjusting the output voltage, frequency and phase, and can dynamically adjust the output parameters according to the deviation of the power quality to compensate for the power quality defects. For example, when the voltage is low and the reactive compensation device cannot effectively increase the voltage to the qualified range, the external power generation device can adjust its own output voltage according to the deviation between the actual voltage and the rated voltage, so that it reaches the qualified level after superimposing with the grid voltage; when the frequency deviation is large, the external power generation device can adjust the output frequency for compensation; when there is a harmonic problem, the external power generation device can generate a waveform opposite to the harmonic through a special circuit design to offset it.

[0054] Power temporary storage unit: When the power quality is better than the evaluation standard, the power temporary storage unit stores the excess power in energy storage devices, such as battery packs or supercapacitors. When the power quality decreases or the power consumption peaks, the stored power is released and supplemented to the power consumption side to maintain the stability of power quality and meet power demand.

[0055] Storage module: used to store various data collected by the power quality acquisition module, as well as the power quality assessment standards and power usage time planning strategies generated by the data analysis and processing module, for subsequent query, analysis and optimization.

[0056] Communication module: Use wired or wireless communication technologies, such as Ethernet, Wi-Fi, 4G / 5G, etc., to achieve data communication between the intelligent power quality platform and external devices such as power station monitoring systems, power equipment control systems, and external power generation device control systems. This can obtain power supply information from power stations in real time, send control instructions to power equipment, and achieve coordinated management of the entire power system.

[0057] Display and alarm module: connected to the data analysis and processing module, the power quality assessment results, power usage time planning information, etc. are displayed on the display screen in intuitive charts or text form, which is convenient for staff to view. At the same time, when the power quality is abnormal, such as severe voltage fluctuations, excessive harmonics, etc., an audible and visual alarm signal is issued to remind staff to take timely measures to deal with it.

[0058] The specific applications are as follows:

[0059] The intelligent power quality platform of the present invention is installed in an industrial power consumption park. The supply-side power quality acquisition unit in the power quality acquisition module is connected to the power supply entrance of the park, monitors the power quality parameters transmitted from the power station in real time, and transmits the data to the data analysis and processing module. The power consumption pattern acquisition unit on the power consumption side is connected to the smart meters of each enterprise in the park to collect power consumption data. The power consumption requirement acquisition unit obtains the requirements of different enterprises for power quality by communicating with the equipment management system of each enterprise.

[0060] The data analysis and processing module determines the power quality assessment standards and power usage time planning strategies of the park based on the collected data. For example, for some enterprises with high production continuity requirements and sensitive to voltage stability, their production is scheduled in time periods with better power quality and strict voltage fluctuation thresholds are set; while for some auxiliary production equipment or workshops with relatively low power quality requirements, the requirements can be appropriately relaxed and they can be arranged to operate when the power quality fluctuates greatly.

[0061] During the power quality assessment process, when the voltage is monitored, the voltage deviation rate and voltage fluctuation are calculated and compared with the preset threshold value; for frequency, the frequency deviation is calculated and judged; for harmonics, harmonic analysis is performed to determine whether the amplitude of each harmonic and the total harmonic distortion rate exceed the standard.

[0062] When the power quality control module detects that the power quality is lower than the evaluation standard, for example, the voltage drops, the power quality adjustment unit first tries to start the reactive power compensation device in the park to increase the voltage. If the voltage still does not meet the standard after reactive power compensation, the external power generation device is connected. The external power generation device adjusts its own output voltage and superimposes it with the grid voltage based on the voltage deviation information sent by the platform to restore the voltage to normal. If there is a frequency deviation or harmonic problem, the external power generation device also performs corresponding frequency adjustment or harmonic cancellation operations according to the platform instructions. When the power quality is better than the evaluation standard, the power temporary storage unit stores the excess power in the park's energy storage system.

[0063] The storage module records all collected data, evaluation criteria and planning strategies for subsequent analysis and optimization. The communication module ensures smooth data transmission between the platform and the power station, various enterprise equipment and external power generation devices, and realizes information sharing and collaborative work. The display and alarm module is installed in the monitoring center of the park. The staff can check the power quality and power consumption planning information at any time. When the power quality is abnormal, they will receive alarm notifications in time and take corresponding measures.

[0064] It can be seen from the above embodiments that the intelligent power quality platform of the present invention can effectively monitor, evaluate and regulate the power quality on the power consumption side, thereby improving the reliability and economy of the entire park power system.

[0065] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. An intelligent power quality platform, characterized in that: include: The power quality collection module is used to collect regularity data of power quality on the supply side and power consumption regularity data and power consumption requirement data on the power consumption side; A data analysis and processing module, connected to the power quality acquisition module, for analyzing and processing the power quality law data on the supply side, the power consumption law data on the power consumption side and the power consumption requirement data, so as to determine the power quality evaluation standard and the power consumption time planning strategy; A power quality control module is connected to the data analysis and processing module, and is used to adjust the power quality supply when the analysis and processing show that the power quality is worse than the power requirement data; A storage module is connected to the data analysis and processing module and is used to store the supply-side power quality law data, the power consumption law data on the power consumption side, the power consumption requirement data, the power quality assessment standard and the power consumption time planning strategy.

2. The intelligent power quality platform according to claim 1, characterized in that: The data analysis and processing module uses the following method to evaluate the power quality: Based on voltage stability assessment: calculate the voltage deviation rate, that is, the difference between the actual voltage value and the rated voltage value divided by the percentage of the rated voltage value. When the voltage deviation rate exceeds the preset voltage deviation threshold range, it is determined that the voltage stability does not meet the requirements; at the same time, analyze the voltage fluctuation situation and calculate the difference between the maximum and minimum voltage values ​​in a short period of time. If the difference exceeds the set voltage fluctuation threshold, the voltage fluctuation is considered abnormal; Based on frequency stability assessment: monitor the actual frequency value and calculate the frequency deviation, that is, the difference between the actual frequency value and the rated frequency value. If the frequency deviation exceeds the preset frequency deviation threshold, the frequency stability is judged to be substandard; Assessment based on harmonic content: Use the harmonic analysis algorithm to perform harmonic analysis on the collected current or voltage signal to determine the amplitude and content of each harmonic. When the amplitude of a specific harmonic exceeds the set harmonic amplitude threshold or the total harmonic distortion rate exceeds the preset total harmonic distortion rate threshold, it is determined that the harmonic content exceeds the standard.

3. The intelligent power quality platform according to claim 1, characterized in that: The power quality control module includes: The power quality adjustment unit, when detecting that the power quality is lower than the evaluation standard, adjusts the power quality by adjusting the reactive compensation device of the power equipment, the filter or connecting an external power generation device to make it meet the power consumption requirements; the external power generation device has the function of adjusting the output voltage, frequency and phase, and can dynamically adjust the output parameters according to the deviation of the power quality to compensate for the power quality defects.

4. The intelligent power quality platform according to claim 1, characterized in that: The power quality acquisition module includes: The supply-side power quality collection unit is used to collect regular data on the power quality parameters of the power transmitted from the power station over time, wherein the power quality parameters include voltage stability, frequency stability, and harmonic content; The power consumption pattern collection unit on the power consumption side is used to collect power consumption pattern data such as power consumption, power consumption, type and quantity of power consumption equipment in different time periods on the power consumption side; The power consumption requirement collection unit is used to collect the power quality requirement data of the power consumption side, including the allowable voltage fluctuation range, frequency deviation range, and harmonic limit.

5. The intelligent power quality platform according to claim 1, characterized in that: The data analysis and processing module comprises: An evaluation standard determination unit, which determines the evaluation standard of power quality, including qualified thresholds of various power quality parameters, according to the supply-side power quality law data and the power demand data; The electricity usage time planning unit formulates an electricity usage time planning strategy based on the electricity usage law data and electricity usage requirement data on the electricity usage side. The electricity usage time planning strategy includes a plurality of pre-configured electricity usage plans. The electricity usage plan includes the electricity usage time and electricity usage requirement data of each user on the electricity usage side. The electricity usage score of each electricity usage plan is calculated respectively. The electricity usage score is used to evaluate the electricity usage quality of the electricity usage plan. The electricity usage plan with the highest electricity usage score is used as the recommended electricity usage plan.

6. The intelligent power quality platform according to claim 1, characterized in that: The power quality control module includes: The power quality adjustment unit, when it is detected that the power quality is lower than the evaluation standard, adjusts the power quality by adjusting the power equipment such as reactive power compensation device, filter, etc. to make it meet the power demand; The electric energy temporary storage unit stores the excess electric energy in the energy storage device when the power demand on the power consumption side is less than the demand threshold, so as to release it for use when the power quality decreases or when the power consumption is at a peak.

7. The intelligent power quality platform according to claim 1, characterized in that: Also includes: The communication module is used to realize data communication between the power quality intelligent platform and external equipment such as power station monitoring system and power equipment control system, so as to obtain and transmit power quality related information and control instructions in real time.

8. The intelligent power quality platform according to claim 1, characterized in that: Also includes: The display and alarm module is connected to the data analysis and processing module and is used to display the power quality assessment results, power usage time planning information, and send out an alarm signal when the power quality is abnormal to remind the staff to handle it.

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