A three-phase power supply balanced output method and system with intelligent feedback regulation

Abstract

The present invention relates to the field of power balance regulation and discloses a method and system for balanced output of a three-phase power supply using intelligent feedback regulation. The method comprises the following steps: constructing an intelligent feedback three-phase power supply system for determining the three-phase imbalance and power factor of the three-phase power supply, and performing balanced output of the three-phase power supply based on the three-phase imbalance and power factor of the target three-phase power supply; and simultaneously performing operational feasibility analysis and maintenance on other circuit components within the intelligent feedback three-phase power supply system. The present invention can achieve balanced output distribution of the three-phase power supply, reduce voltage fluctuations and current distortion caused by imbalance, and thus ensure the stability and reliability of power transmission.

Description

Technical Field

[0001] The present invention relates to the field of power supply balance regulation, and in particular to a three-phase power supply balance output method and system with intelligent feedback regulation. Background Art

[0002] A three-phase power supply is one that provides symmetrical three-phase electromotive force (EMF). Its characteristics are primarily determined by the properties of three-phase alternating current (AC). Three-phase AC, short for three-phase sinusoidal alternating current, consists of three symmetrical electromotive forces with the same frequency, equal maximum value, and a 120-degree phase shift. Three-phase power supplies may experience faults during voltage and current output, including three-phase load imbalance and three-phase output imbalance. When a three-phase power supply experiences a fault and output imbalance, it results in additional energy loss, such as increased reactive power and increased line losses. Furthermore, unbalanced three-phase power output increases the burden on the power grid, leading to voltage fluctuations and current imbalances. This not only impacts the grid's stable operation but can also damage other equipment within the grid. Balanced three-phase output reduces stress and wear on equipment, thereby extending its lifespan. It also improves power supply quality and reduces the impact of voltage fluctuations and current imbalances on user equipment. This is crucial for ensuring reliable and stable power supply to users. Summary of the Invention

[0003] The present invention overcomes the deficiencies of the prior art and provides a three-phase power supply balanced output method and system with intelligent feedback regulation.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A first aspect of the present invention provides a three-phase power supply balanced output method with intelligent feedback regulation, comprising the following steps:

[0006] Construct a three-phase power supply system that can provide power parameter feedback, calibrated as an intelligent feedback three-phase power supply system;

[0007] Running an intelligent feedback three-phase power supply system, calculating a three-phase unbalance and a power factor of a target three-phase power supply, and performing balanced output distribution on the target three-phase power supply based on the three-phase unbalance and the power factor of the target three-phase power supply;

[0008] Operate the intelligent feedback three-phase power supply system, monitor and pre-process the voltage parameters and current parameters of each power system circuit component in the intelligent feedback three-phase power supply system in real time, and perform operation feasibility analysis and maintenance on the intelligent feedback three-phase power supply system.

[0009] Furthermore, in a preferred embodiment of the present invention, the three-phase power supply system capable of performing power supply parameter feedback is calibrated as an intelligent feedback three-phase power supply system, specifically:

[0010] Obtain the three-phase power supply that needs to be balanced and calibrate it as the target three-phase power supply;

[0011] Acquire structural elements of a power supply system, wherein the structural elements of the power supply system include a voltage monitoring sensor, a current monitoring sensor, a variable load, an intelligent control unit, and a cable;

[0012] Obtaining a power supply rated parameter range of a target three-phase power supply, and based on the power supply rated parameter range of the target three-phase power supply, determining a construction element of a power supply system whose component parameters can be parameter-matched with the power supply rated parameter range of the target three-phase power supply, and marking the element as a target construction element;

[0013] Acquire a big data network, retrieve all connection schemes between a target structural element and a target three-phase power supply based on the big data network, and mark them as connection schemes to be analyzed;

[0014] Analyze all connection schemes to be analyzed, and eliminate connection schemes to be analyzed in which the voltage monitoring sensor and the current monitoring sensor in the target structural element cannot monitor the voltage and current of the target three-phase power supply in real time after connection, to obtain a target connection scheme;

[0015] Based on the target connection scheme, all target structural elements and the target three-phase power supply are connected to obtain an intelligent feedback three-phase power supply system.

[0016] Furthermore, in a preferred embodiment of the present invention, the intelligent feedback three-phase power supply system is operated to calculate the three-phase imbalance and power factor of the target three-phase power supply, and based on the three-phase imbalance and power factor of the target three-phase power supply, the target three-phase power supply is balanced and output distributed, specifically:

[0017] The voltage monitoring sensor, current monitoring sensor, variable load and intelligent control unit in the target structural element are calibrated as a target voltage monitoring sensor, a target current monitoring sensor, a target variable load and a target intelligent control unit respectively;

[0018] Running the intelligent feedback three-phase power supply system, during the operation of the intelligent feedback three-phase power supply system, monitoring the phase voltage and phase current of different phases of the target three-phase power supply in real time through the target voltage monitoring sensor and the target current monitoring sensor;

[0019] Analyze the phase currents of different phases in the target three-phase power supply, calculate the maximum line current and the three-phase average current of the target three-phase power supply, and calculate the three-phase imbalance of the target three-phase power supply based on the maximum phase current and the three-phase average current of the target three-phase power supply;

[0020] The three-phase imbalance degree is calculated as (maximum phase current - three-phase average current) / three-phase average current * 100%;

[0021] Perform threshold analysis on the three-phase imbalance of the target three-phase power supply and preset a three-phase maximum imbalance threshold. If the three-phase imbalance of the target power supply is lower than the three-phase maximum imbalance threshold, the target three-phase power supply is directly calibrated as a qualified output three-phase power supply.

[0022] If the three-phase imbalance of the target power supply is maintained within the three-phase maximum imbalance threshold, the target three-phase power supply is calibrated as outputting a preliminarily qualified three-phase power supply;

[0023] If the three-phase unbalance of the target three-phase power supply is greater than the three-phase maximum unbalance threshold, the target three-phase power supply is calibrated as an output abnormal three-phase power supply;

[0024] The target three-phase power supply is subjected to power analysis, and the fuzzy control method is introduced in combination with the power analysis results to perform balanced output distribution on the target three-phase power supply to obtain a qualified three-phase power supply.

[0025] Furthermore, in a preferred embodiment of the present invention, the target three-phase power supply is subjected to power analysis, and based on the power analysis results, the target three-phase power supply is subjected to balanced output distribution to obtain a qualified output three-phase power supply, specifically:

[0026] A phase difference measuring device is introduced to monitor the phase difference between the phase voltage and phase current in different phases of the target three-phase power supply;

[0027] calculating the active power and apparent power of different phases in the target three-phase power supply based on phase differences between phase voltages and phase currents in different phases in the target three-phase power supply and combining the phase voltages and phase currents of different phases in the target three-phase power supply, and calculating the power factors of different phases in the target three-phase power supply based on the active power and apparent power of different phases in the target three-phase power supply;

[0028] Presetting a power factor threshold and importing the power factor threshold into a target intelligent control unit in the intelligent feedback three-phase power supply system, and analyzing the power factors of different phases in the target three-phase power supply in the target intelligent control unit;

[0029] When the power factor of a phase in the target three-phase power supply is not within the power factor threshold, the corresponding phase in the target three-phase power supply is calibrated as an abnormal phase. When there is no abnormal phase in the target three-phase power supply, the target three-phase power supply is directly calibrated as a qualified output three-phase power supply.

[0030] When there is an abnormal phase in the target three-phase power supply and the target three-phase power supply is a three-phase power supply with preliminary qualified output, the abnormal phase of the target three-phase power supply is balanced and output by the target intelligent control unit to obtain a qualified three-phase power supply;

[0031] The balanced output is to adjust the phase voltage and phase current of the abnormal phase so that the power factor of the abnormal phase is maintained within the power factor threshold;

[0032] When an abnormal phase exists in the target three-phase power supply, but the target three-phase power supply outputs an abnormal three-phase power supply, a reactive power compensation device is introduced to control the power factor of the abnormal phase of the target three-phase power supply so that the power factor of the abnormal phase is maintained within the power factor threshold, thereby obtaining a qualified three-phase power supply output.

[0033] Furthermore, in a preferred embodiment of the present invention, the operation of the intelligent feedback three-phase power supply system, real-time monitoring and pre-processing of voltage parameters and current parameters of each power system circuit element in the intelligent feedback three-phase power supply system, and operation feasibility analysis and maintenance of the intelligent feedback three-phase power supply system are specifically as follows:

[0034] Run the intelligent feedback three-phase power supply system, and based on the target voltage monitoring sensor and the target current monitoring sensor, monitor the voltage parameters and current parameters of each power system circuit component in the intelligent feedback three-phase power supply system in real time, and calibrate them into real-time voltage parameters and real-time current parameters;

[0035] Analyzing the real-time voltage parameters and the real-time current parameters to determine whether the real-time voltage parameters and the real-time current parameters of all power system circuit elements are simultaneously maintained within a power supply rated parameter range for outputting a qualified three-phase power supply, wherein the power supply rated parameter range for outputting a qualified three-phase power supply includes a voltage rated parameter range and a current rated parameter range;

[0036] If not, obtain the load adjustable range value of the target variable load, and determine whether the load value of the target variable load in the intelligent feedback three-phase power supply system is within the load adjustable range value; if not, adjust the load value of the target variable load so that the load value of the target variable load is within the load adjustable range value;

[0037] If the load value of the target variable load is within the load adjustable range, but the real-time voltage parameters and real-time current parameters of all power system circuit elements are still not simultaneously maintained within the power rated parameter range of the qualified three-phase power output, then in the intelligent feedback three-phase power supply system, the power system circuit element whose real-time voltage parameter or real-time current parameter is not maintained within the power rated parameter range of the qualified three-phase power output is marked as an abnormal power system circuit element;

[0038] Perform fault analysis and tracing on all abnormal power supply system circuit components, and perform fault repair on abnormal power supply system circuit components based on the fault analysis and tracing results.

[0039] Furthermore, in a preferred embodiment of the present invention, the fault analysis and tracing of all abnormal power system circuit components, and the fault repair of the abnormal power system circuit components based on the fault analysis and tracing results, are specifically as follows:

[0040] Freely combine different abnormal power system circuit elements to obtain different abnormal power system circuit element combinations;

[0041] The grey correlation method is introduced to perform correlation analysis on the real-time voltage parameters and real-time current parameters of different abnormal power system circuit component combinations, and the grey correlation values ​​between different abnormal power system circuit components are calculated and calibrated as the first correlation value. At the same time, the standard correlation value is preset.

[0042] Marking the corresponding abnormal power system circuit element combination whose first correlation value is greater than the standard correlation value as a type of abnormal power system circuit element combination, and marking the type of abnormal power system circuit element combination in which all abnormal power system circuit elements are replaceable as a type of replaceable abnormal power system circuit element combination;

[0043] Replace all abnormal power system circuit components in the replaceable first-class abnormal power system circuit component combination, and replace the abnormal power system circuit components that are not in the first-class abnormal power system circuit component combination and are replaceable components;

[0044] Based on the big data network, the maintenance plan output of all abnormal power system circuit components that have not been replaced is retrieved to obtain a qualified intelligent feedback three-phase power system.

[0045] A second aspect of the present invention further provides a three-phase power supply balanced output system with intelligent feedback regulation. The three-phase power supply balanced output system includes a memory and a processor. The memory stores a three-phase power supply balanced output method. When the three-phase power supply balanced output method is executed by the processor, the following steps are implemented:

[0046] Construct a three-phase power supply system that can provide power parameter feedback, calibrated as an intelligent feedback three-phase power supply system;

[0047] Running an intelligent feedback three-phase power supply system, calculating a three-phase unbalance and a power factor of a target three-phase power supply, and performing balanced output distribution on the target three-phase power supply based on the three-phase unbalance and the power factor of the target three-phase power supply;

[0048] Operate the intelligent feedback three-phase power supply system, monitor and pre-process the voltage parameters and current parameters of each power system circuit component in the intelligent feedback three-phase power supply system in real time, and perform operation feasibility analysis and maintenance on the intelligent feedback three-phase power supply system.

[0049] The present invention addresses the technical deficiencies in the background art and has the following beneficial effects: It constructs an intelligent feedback three-phase power supply system for determining the three-phase imbalance and power factor of a three-phase power supply, and performs balanced output of the three-phase power supply based on the three-phase imbalance and power factor of a target three-phase power supply, while also performing operational feasibility analysis and maintenance on other circuit components within the intelligent feedback three-phase power supply system. The present invention can achieve balanced output distribution of the three-phase power supply, reducing voltage fluctuations and current distortion caused by imbalance, thereby ensuring the stability and reliability of power transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, without paying any creative work, they can also obtain drawings of other embodiments based on these drawings.

[0051] Figure 1 A flow chart showing a three-phase power supply balanced output method with intelligent feedback regulation is shown;

[0052] Figure 2 A flow chart of a method for performing balanced output distribution on a target three-phase power supply is shown;

[0053] Figure 3 A program view of a three-phase power supply balanced output system with intelligent feedback regulation is shown. DETAILED DESCRIPTION

[0054] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features therein can be combined with each other.

[0055] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0056] Figure 1 A flow chart of a three-phase power supply balanced output method with intelligent feedback regulation is shown, comprising the following steps:

[0057] S102: Construct a three-phase power supply system capable of providing power supply parameter feedback, calibrated as an intelligent feedback three-phase power supply system;

[0058] S104: running the intelligent feedback three-phase power supply system to calculate the three-phase imbalance and power factor of the target three-phase power supply, and performing balanced output distribution on the target three-phase power supply based on the three-phase imbalance and power factor of the target three-phase power supply;

[0059] S106: operate the intelligent feedback three-phase power supply system, monitor and pre-process the voltage parameters and current parameters of each power system circuit element in the intelligent feedback three-phase power supply system in real time, and perform operation feasibility analysis and maintenance on the intelligent feedback three-phase power supply system.

[0060] Furthermore, in a preferred embodiment of the present invention, the three-phase power supply system capable of performing power supply parameter feedback is calibrated as an intelligent feedback three-phase power supply system, specifically:

[0061] Obtain the three-phase power supply that needs to be balanced and calibrate it as the target three-phase power supply;

[0062] Acquire structural elements of a power supply system, wherein the structural elements of the power supply system include a voltage monitoring sensor, a current monitoring sensor, a variable load, an intelligent control unit, and a cable;

[0063] Obtaining a power supply rated parameter range of a target three-phase power supply, and based on the power supply rated parameter range of the target three-phase power supply, determining a construction element of a power supply system whose component parameters can be parameter-matched with the power supply rated parameter range of the target three-phase power supply, and marking the element as a target construction element;

[0064] Acquire a big data network, retrieve all connection schemes between a target structural element and a target three-phase power supply based on the big data network, and mark them as connection schemes to be analyzed;

[0065] Analyze all connection schemes to be analyzed, and eliminate connection schemes to be analyzed in which the voltage monitoring sensor and the current monitoring sensor in the target structural element cannot monitor the voltage and current of the target three-phase power supply in real time after connection, to obtain a target connection scheme;

[0066] Based on the target connection scheme, all target structural elements and the target three-phase power supply are connected to obtain an intelligent feedback three-phase power supply system.

[0067] It should be noted that after determining the target three-phase power supply, a three-phase power supply system that can provide power supply parameter feedback needs to be constructed to detect whether the three-phase power supply is in a balanced output state. If the three-phase power supply is not in a balanced output state, the three-phase power supply needs to be adjusted. Building an intelligent feedback three-phase power supply system requires multiple structural elements and three-phase power supply components. Therefore, the structural elements of the power supply system are determined, and the connection scheme between the target structural elements and the target three-phase power supply is retrieved. At the same time, the connection schemes are screened and the connection scheme output of the structural element sensors is selected to obtain the intelligent feedback three-phase power supply system.

[0068] Furthermore, in a preferred embodiment of the present invention, the operation of the intelligent feedback three-phase power supply system, real-time monitoring and pre-processing of voltage parameters and current parameters of each power system circuit element in the intelligent feedback three-phase power supply system, and operation feasibility analysis and maintenance of the intelligent feedback three-phase power supply system are specifically as follows:

[0069] Run the intelligent feedback three-phase power supply system, and based on the target voltage monitoring sensor and the target current monitoring sensor, monitor the voltage parameters and current parameters of each power system circuit component in the intelligent feedback three-phase power supply system in real time, and calibrate them into real-time voltage parameters and real-time current parameters;

[0070] Analyzing the real-time voltage parameters and the real-time current parameters to determine whether the real-time voltage parameters and the real-time current parameters of all power system circuit elements are simultaneously maintained within a power supply rated parameter range for outputting a qualified three-phase power supply, wherein the power supply rated parameter range for outputting a qualified three-phase power supply includes a voltage rated parameter range and a current rated parameter range;

[0071] If not, obtain the load adjustable range value of the target variable load, and determine whether the load value of the target variable load in the intelligent feedback three-phase power supply system is within the load adjustable range value; if not, adjust the load value of the target variable load so that the load value of the target variable load is within the load adjustable range value;

[0072] If the load value of the target variable load is within the load adjustable range, but the real-time voltage parameters and real-time current parameters of all power system circuit elements are still not maintained within the power rated parameter range of the qualified three-phase power output at the same time, then in the intelligent feedback three-phase power supply system, the power system circuit element whose real-time voltage parameters or real-time current parameters are not maintained within the power rated parameter range of the qualified three-phase power output is calibrated as an abnormal power system circuit element.

[0073] It should be noted that in the intelligent feedback three-phase power supply system, the three-phase power supply is a qualified three-phase power supply. To ensure the proper functioning of the intelligent feedback three-phase power supply system, other circuit components within the system must also maintain normal operating levels. Therefore, the voltage and current parameters of each power supply circuit component within the intelligent feedback three-phase power supply system are analyzed, and operational feasibility is determined based on the analysis results. The output parameters of the qualified three-phase power supply correspond to the output parameters of the various circuit components in the system. The output parameters of the circuit components must not exceed the rated parameter range of the qualified three-phase power supply. If the voltage and current parameters of any component do not simultaneously remain within the rated parameter range of the qualified three-phase power supply, the target variable load is first determined to be abnormal. The target variable load is then determined to be within the standard range. If not, load adjustment is performed on the variable load. It is then determined whether the voltage and current parameters of any component still remain within the rated parameter range of the qualified three-phase power supply after load adjustment. If so, the component is considered abnormal and fault analysis and repair are required.

[0074] Furthermore, in a preferred embodiment of the present invention, the fault analysis and tracing of all abnormal power system circuit components, and the fault repair of the abnormal power system circuit components based on the fault analysis and tracing results, are specifically as follows:

[0075] Freely combine different abnormal power system circuit elements to obtain different abnormal power system circuit element combinations;

[0076] The grey correlation method is introduced to perform correlation analysis on the real-time voltage parameters and real-time current parameters of different abnormal power system circuit component combinations, and the grey correlation values ​​between different abnormal power system circuit components are calculated and calibrated as the first correlation value. At the same time, the standard correlation value is preset.

[0077] Marking the corresponding abnormal power system circuit element combination whose first correlation value is greater than the standard correlation value as a type of abnormal power system circuit element combination, and marking the type of abnormal power system circuit element combination in which all abnormal power system circuit elements are replaceable as a type of replaceable abnormal power system circuit element combination;

[0078] Replace all abnormal power system circuit components in the replaceable first-class abnormal power system circuit component combination, and replace the abnormal power system circuit components that are not in the first-class abnormal power system circuit component combination and are replaceable components;

[0079] Based on the big data network, the maintenance plan output of all abnormal power system circuit components that have not been replaced is retrieved to obtain a qualified intelligent feedback three-phase power system.

[0080] It should be noted that different abnormal power system circuit components may affect each other. For example, replacing one abnormal power system circuit component may affect another abnormal power system circuit component and cause a related failure. To determine whether abnormal power system circuit components affect each other, one can calculate whether the voltage and current parameters of the abnormal power system circuit components are correlated. For example, adjusting the position of one abnormal power system circuit component may change the voltage or current parameters of another abnormal power system circuit component. Different combinations of abnormal power system circuit components are obtained, and the gray correlation method is used to calculate the gray correlation values ​​of the voltage and current parameters of these different abnormal power system circuit component combinations. If the gray correlation value is greater than the standard value, all abnormal power system circuit components in the combination are correlated and require the same treatment. Treatment of abnormal power system circuit components includes replacement and overhaul. If all abnormal power system circuit components in a given combination are replaceable, they must be replaced to prevent further problems during replacement. Abnormal power system circuit components that are not correlated and that are replaceable should be replaced. This is because replacement is more effective than repair. At the same time, other abnormal power supply system circuit components that have not been replaced are inspected and repaired to obtain a qualified intelligent feedback three-phase power supply system.

[0081] Figure 2 A flow chart of a method for performing balanced output distribution on a target three-phase power supply is shown, comprising the following steps:

[0082] S202: Calculating a three-phase imbalance of a target three-phase power supply, and classifying the target three-phase power supply based on the three-phase imbalance;

[0083] S204: Perform power analysis on the target three-phase power supply, and based on the power analysis result, perform balanced output distribution on the target three-phase power supply to obtain a qualified output three-phase power supply.

[0084] Furthermore, in a preferred embodiment of the present invention, the intelligent feedback three-phase power supply system is operated to calculate the three-phase imbalance and power factor of the target three-phase power supply, and based on the three-phase imbalance and power factor of the target three-phase power supply, the target three-phase power supply is balanced and output distributed, specifically:

[0085] The voltage monitoring sensor, current monitoring sensor, variable load and intelligent control unit in the target structural element are calibrated as a target voltage monitoring sensor, a target current monitoring sensor, a target variable load and a target intelligent control unit respectively;

[0086] Running the intelligent feedback three-phase power supply system, during the operation of the intelligent feedback three-phase power supply system, monitoring the phase voltage and phase current of different phases of the target three-phase power supply in real time through the target voltage monitoring sensor and the target current monitoring sensor;

[0087] Analyze the phase currents of different phases in the target three-phase power supply, calculate the maximum line current and the three-phase average current of the target three-phase power supply, and calculate the three-phase imbalance of the target three-phase power supply based on the maximum phase current and the three-phase average current of the target three-phase power supply;

[0088] The three-phase imbalance degree is calculated as (maximum phase current - three-phase average current) / three-phase average current * 100%;

[0089] Perform threshold analysis on the three-phase imbalance of the target three-phase power supply and preset a three-phase maximum imbalance threshold. If the three-phase imbalance of the target power supply is lower than the three-phase maximum imbalance threshold, the target three-phase power supply is directly calibrated as a qualified output three-phase power supply.

[0090] If the three-phase imbalance of the target power supply is maintained within the three-phase maximum imbalance threshold, the target three-phase power supply is calibrated as outputting a preliminarily qualified three-phase power supply;

[0091] If the three-phase imbalance of the target three-phase power supply is greater than the three-phase maximum imbalance threshold, the target three-phase power supply is calibrated as an output abnormal three-phase power supply.

[0092] It should be noted that during the operation of the intelligent feedback three-phase power supply system, if the phase voltage and phase current of the three-phase output are different, that is, the three-phase is unbalanced, it will cause additional energy loss, such as an increase in reactive power and an increase in line loss, and even damage to the power supply. To determine whether the outputs of different phases in the three-phase power supply are equal, the three-phase imbalance and the power factors of the different phases can be used to determine. The three-phase imbalance is calculated as (maximum phase current - three-phase average current) / three-item average current * 100%. Three-phase imbalance will increase the reactive power and line loss of the system, reduce overall energy efficiency, and severe imbalance may cause protection device errors, affecting the stable operation of the power system. Based on the three-phase imbalance, the target three-phase power supply is classified, because different three-phase imbalances are matched with different power factors, and the adjustment methods of the three-phase power supply are different.

[0093] Furthermore, in a preferred embodiment of the present invention, the target three-phase power supply is subjected to power analysis, and based on the power analysis results, the target three-phase power supply is subjected to balanced output distribution to obtain a qualified output three-phase power supply, specifically:

[0094] A phase difference measuring device is introduced to monitor the phase difference between the phase voltage and phase current in different phases of the target three-phase power supply;

[0095] calculating the active power and apparent power of different phases in the target three-phase power supply based on phase differences between phase voltages and phase currents in different phases in the target three-phase power supply and combining the phase voltages and phase currents of different phases in the target three-phase power supply, and calculating the power factors of different phases in the target three-phase power supply based on the active power and apparent power of different phases in the target three-phase power supply;

[0096] Presetting a power factor threshold and importing the power factor threshold into a target intelligent control unit in the intelligent feedback three-phase power supply system, and analyzing the power factors of different phases in the target three-phase power supply in the target intelligent control unit;

[0097] When the power factor of a phase in the target three-phase power supply is not within the power factor threshold, the corresponding phase in the target three-phase power supply is calibrated as an abnormal phase. When there is no abnormal phase in the target three-phase power supply, the target three-phase power supply is directly calibrated as a qualified output three-phase power supply.

[0098] When there is an abnormal phase in the target three-phase power supply and the target three-phase power supply is a three-phase power supply with preliminary qualified output, the abnormal phase of the target three-phase power supply is balanced and output by the target intelligent control unit to obtain a qualified three-phase power supply;

[0099] The balanced output is to adjust the phase voltage and phase current of the abnormal phase so that the power factor of the abnormal phase is maintained within the power factor threshold;

[0100] When an abnormal phase exists in the target three-phase power supply, but the target three-phase power supply outputs an abnormal three-phase power supply, a reactive power compensation device is introduced to control the power factor of the abnormal phase of the target three-phase power supply so that the power factor of the abnormal phase is maintained within the power factor threshold, thereby obtaining a qualified three-phase power supply output.

[0101] It should be noted that when the three-phase imbalance is abnormal, the power factor calculation for each phase needs to consider the specific conditions of each phase separately. Power factor is defined as the ratio of active power (P) to apparent power. First, the phase difference between the phase voltage and phase current of each phase must be determined. This can be obtained using a specialized measuring instrument, namely a phase difference measuring device. For each phase, the active power calculation formula is:

[0102]

[0103] Among them, P is the active power, U is the phase voltage of the target three-phase power supply, I is the phase current of the target three-phase power supply, Is the phase difference between the corresponding phase voltage and phase current. The calculation formula for apparent power is:

[0104] S=UI

[0105] Among them, S is the apparent power, U is the phase voltage of the target three-phase power supply, and I is the phase current of the target three-phase power supply. Finally, the power factor of each phase is calculated as follows:

[0106]

[0107] Where P is active power, S is apparent power, and PF is power factor. After calculating the power factors of the different phases, it is necessary to determine their magnitude. If the power factors of all phases are within the power factor threshold, the power supply is considered normal. If the power factors of any phases are not within the threshold, and the power supply has a preliminarily qualified three-phase output, balancing the power supply output can be achieved by increasing the output voltage or current of one phase while reducing the output of another phase to balance the load. If the power supply is abnormally three-phase, and any abnormal phase exists, a reactive power compensation device is required to directly compensate for the power factor, thereby increasing the power factor and achieving a qualified three-phase output.

[0108] like Figure 3 As shown, the second aspect of the present invention further provides a three-phase power supply balanced output system with intelligent feedback regulation, the three-phase power supply balanced output system including a memory 31 and a processor 32. The memory 31 stores a three-phase power supply balanced output method. When the three-phase power supply balanced output method is executed by the processor 32, the following steps are implemented:

[0109] Construct a three-phase power supply system that can provide power parameter feedback, calibrated as an intelligent feedback three-phase power supply system;

[0110] Running an intelligent feedback three-phase power supply system, calculating a three-phase unbalance and a power factor of a target three-phase power supply, and performing balanced output distribution on the target three-phase power supply based on the three-phase unbalance and the power factor of the target three-phase power supply;

[0111] Operate the intelligent feedback three-phase power supply system, monitor and pre-process the voltage parameters and current parameters of each power system circuit component in the intelligent feedback three-phase power supply system in real time, and perform operation feasibility analysis and maintenance on the intelligent feedback three-phase power supply system.

[0112] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A three-phase power supply balanced output method with intelligent feedback regulation, characterized in that: The following steps are involved: Construct a three-phase power supply system that can provide power parameter feedback, calibrated as an intelligent feedback three-phase power supply system; Running an intelligent feedback three-phase power supply system, calculating a three-phase unbalance and a power factor of a target three-phase power supply, and performing balanced output distribution on the target three-phase power supply based on the three-phase unbalance and the power factor of the target three-phase power supply; Operate the intelligent feedback three-phase power supply system, monitor and pre-process the voltage and current parameters of each power system circuit component in the intelligent feedback three-phase power supply system in real time, and perform operation feasibility analysis and maintenance on the intelligent feedback three-phase power supply system; The operation of the intelligent feedback three-phase power supply system, real-time monitoring and pre-processing of voltage parameters and current parameters of each power system circuit element in the intelligent feedback three-phase power supply system, and operation feasibility analysis and maintenance of the intelligent feedback three-phase power supply system are specifically as follows: Run the intelligent feedback three-phase power supply system, and based on the target voltage monitoring sensor and the target current monitoring sensor, monitor the voltage parameters and current parameters of each power system circuit component in the intelligent feedback three-phase power supply system in real time, and calibrate them into real-time voltage parameters and real-time current parameters; Analyzing the real-time voltage parameters and the real-time current parameters to determine whether the real-time voltage parameters and the real-time current parameters of all power system circuit elements are simultaneously maintained within a power supply rated parameter range for outputting a qualified three-phase power supply, wherein the power supply rated parameter range for outputting a qualified three-phase power supply includes a voltage rated parameter range and a current rated parameter range; If not, obtain the load adjustable range value of the target variable load, and determine whether the load value of the target variable load in the intelligent feedback three-phase power supply system is within the load adjustable range value; if not, adjust the load value of the target variable load so that the load value of the target variable load is within the load adjustable range value; If the load value of the target variable load is within the load adjustable range, but the real-time voltage parameters and real-time current parameters of all power system circuit elements are still not simultaneously maintained within the power rated parameter range of the qualified three-phase power output, then in the intelligent feedback three-phase power supply system, the power system circuit element whose real-time voltage parameter or real-time current parameter is not maintained within the power rated parameter range of the qualified three-phase power output is marked as an abnormal power system circuit element; Conduct fault analysis and source tracing for all abnormal power system circuit components, and perform fault repairs on abnormal power system circuit components based on the fault analysis and source tracing results; The fault analysis and tracing of all abnormal power system circuit components, and the fault repair of the abnormal power system circuit components based on the fault analysis and tracing results, are specifically as follows: Freely combine different abnormal power system circuit elements to obtain different abnormal power system circuit element combinations; The grey correlation method is introduced to perform correlation analysis on the real-time voltage parameters and real-time current parameters of different abnormal power system circuit component combinations, and the grey correlation values ​​between different abnormal power system circuit components are calculated and calibrated as the first correlation value. At the same time, the standard correlation value is preset. Marking the corresponding abnormal power system circuit element combination whose first correlation value is greater than the standard correlation value as a type of abnormal power system circuit element combination, and marking the type of abnormal power system circuit element combination in which all abnormal power system circuit elements are replaceable as a type of replaceable abnormal power system circuit element combination; Replace all abnormal power system circuit components in the replaceable first-class abnormal power system circuit component combination, and replace the abnormal power system circuit components that are not in the first-class abnormal power system circuit component combination and are replaceable components; Based on the big data network, the maintenance plans of all abnormal power system circuit components that have not been replaced are retrieved and output to obtain a qualified intelligent feedback three-phase power supply system.

2. The three-phase power supply balanced output method with intelligent feedback regulation according to claim 1, characterized in that: The three-phase power supply system capable of power supply parameter feedback is calibrated as an intelligent feedback three-phase power supply system, specifically: Obtain the three-phase power supply that needs to be balanced and calibrate it as the target three-phase power supply; Acquire structural elements of a power supply system, wherein the structural elements of the power supply system include a voltage monitoring sensor, a current monitoring sensor, a variable load, an intelligent control unit, and a cable; Obtaining a power supply rated parameter range of a target three-phase power supply, and based on the power supply rated parameter range of the target three-phase power supply, determining a construction element of a power supply system whose component parameters can be parameter-matched with the power supply rated parameter range of the target three-phase power supply, and marking the element as a target construction element; Acquire a big data network, retrieve all connection schemes between a target structural element and a target three-phase power supply based on the big data network, and mark them as connection schemes to be analyzed; Analyze all connection schemes to be analyzed, and eliminate connection schemes to be analyzed in which the voltage monitoring sensor and the current monitoring sensor in the target structural element cannot monitor the voltage and current of the target three-phase power supply in real time after connection, to obtain a target connection scheme; Based on the target connection scheme, all target structural elements and the target three-phase power supply are connected to obtain an intelligent feedback three-phase power supply system.

3. The three-phase power supply balanced output method with intelligent feedback regulation according to claim 1, characterized in that: The intelligent feedback three-phase power supply system is operated to calculate the three-phase imbalance and power factor of the target three-phase power supply, and based on the three-phase imbalance and power factor of the target three-phase power supply, the target three-phase power supply is balanced and output distributed, specifically: The voltage monitoring sensor, current monitoring sensor, variable load and intelligent control unit in the target structural element are calibrated as a target voltage monitoring sensor, a target current monitoring sensor, a target variable load and a target intelligent control unit respectively; Running the intelligent feedback three-phase power supply system, during the operation of the intelligent feedback three-phase power supply system, monitoring the phase voltage and phase current of different phases of the target three-phase power supply in real time through the target voltage monitoring sensor and the target current monitoring sensor; Analyze the phase currents of different phases in the target three-phase power supply, calculate the maximum phase current and the three-phase average current of the target three-phase power supply, and calculate the three-phase imbalance of the target three-phase power supply based on the maximum phase current and the three-phase average current of the target three-phase power supply; The three-phase imbalance degree is calculated as (maximum phase current - three-phase average current) / three-phase average current * 100%; Perform threshold analysis on the three-phase imbalance of the target three-phase power supply and preset a three-phase maximum imbalance threshold. If the three-phase imbalance of the target power supply is lower than the three-phase maximum imbalance threshold, the target three-phase power supply is directly calibrated as a qualified output three-phase power supply. If the three-phase imbalance of the target power supply is maintained within the three-phase maximum imbalance threshold, the target three-phase power supply is calibrated as outputting a preliminarily qualified three-phase power supply; If the three-phase unbalance of the target three-phase power supply is greater than the three-phase maximum unbalance threshold, the target three-phase power supply is calibrated as an output abnormal three-phase power supply; The target three-phase power supply is subjected to power analysis, and the fuzzy control method is introduced in combination with the power analysis results to perform balanced output distribution on the target three-phase power supply to obtain a qualified three-phase power supply.

4. The three-phase power supply balanced output method with intelligent feedback regulation according to claim 3, characterized in that: The target three-phase power supply is subjected to power analysis, and the fuzzy control method is introduced in combination with the power analysis result to perform balanced output distribution on the target three-phase power supply to obtain a qualified output three-phase power supply, specifically: A phase difference measuring device is introduced to monitor the phase difference between the phase voltage and phase current in different phases of the target three-phase power supply; calculating the active power and apparent power of different phases in the target three-phase power supply based on phase differences between phase voltages and phase currents in different phases in the target three-phase power supply and combining the phase voltages and phase currents of different phases in the target three-phase power supply, and calculating the power factors of different phases in the target three-phase power supply based on the active power and apparent power of different phases in the target three-phase power supply; Presetting a power factor threshold and importing the power factor threshold into a target intelligent control unit in the intelligent feedback three-phase power supply system, and analyzing the power factors of different phases in the target three-phase power supply in the target intelligent control unit; When the power factor of a phase in the target three-phase power supply is not within the power factor threshold, the corresponding phase in the target three-phase power supply is calibrated as an abnormal phase. When there is no abnormal phase in the target three-phase power supply, the target three-phase power supply is directly calibrated as a qualified output three-phase power supply. When there is an abnormal phase in the target three-phase power supply and the target three-phase power supply is a three-phase power supply with preliminary qualified output, the abnormal phase of the target three-phase power supply is balanced and output by the target intelligent control unit to obtain a qualified three-phase power supply; The balanced output is to adjust the phase voltage and phase current of the abnormal phase so that the power factor of the abnormal phase is maintained within the power factor threshold; When an abnormal phase exists in the target three-phase power supply, but the target three-phase power supply outputs an abnormal three-phase power supply, a reactive power compensation device is introduced to control the power factor of the abnormal phase of the target three-phase power supply so that the power factor of the abnormal phase is maintained within the power factor threshold, thereby obtaining a qualified three-phase power supply output.

5. A three-phase power supply balanced output system with intelligent feedback regulation, characterized in that: The three-phase power balanced output system includes a memory and a processor, wherein the memory stores a three-phase power balanced output method program. When the three-phase power balanced output method program is executed by the processor, the three-phase power balanced output method steps as described in any one of claims 1 to 4 are implemented.

Images