Intelligent feedback regulation three-phase power supply balanced output method and system

Abstract

The invention relates to the field of power supply balance adjustment, and discloses an intelligent feedback adjustment three-phase power supply balance output method and system, and the method comprises the following steps: constructing an intelligent feedback three-phase power supply system which is used for judging the three-phase unbalance degree and the power factor of a three-phase power supply; and carrying out balanced output on the three-phase power supply based on the three-phase unbalance degree and the power factor of the target three-phase power supply, and carrying out operation feasibility analysis and maintenance on other circuit elements in the intelligent feedback three-phase power supply system. Balanced output distribution of the three-phase power supply can be realized, and voltage fluctuation and current distortion caused by imbalance are reduced, so that the stability and reliability of power transmission are ensured.

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 for intelligent feedback regulation. Background Art

[0002] Three-phase power supply refers to a power supply that can provide symmetrical three-phase electromotive force, and its characteristics are mainly determined by the characteristics of three-phase alternating current. Three-phase alternating current is the abbreviation of three-phase sinusoidal alternating current, which consists of three symmetrical three-phase electromotive forces with the same frequency, equal maximum value, and 120 degrees phase difference between each other. When the three-phase power supply outputs voltage and current, there may be faults, including three-phase load imbalance, three-phase output imbalance, etc. When there is a fault in the three-phase power supply and the output is unbalanced, it will cause additional energy loss, such as increased reactive power and increased line loss. At the same time, the unbalanced output of the three-phase power supply will increase the burden on the power grid, resulting in voltage fluctuations and current imbalance in the power grid. This will not only affect the stable operation of the power grid, but may also cause damage to other equipment in the power grid. Balanced three-phase output can reduce stress and wear inside the equipment, thereby extending the service life of the equipment. At the same time, balanced three-phase output helps to improve the power supply quality and reduce the impact on user equipment caused by voltage fluctuations and current imbalance. This is of great significance to ensure the reliability and stability of user power consumption. 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 supply parameter feedback, calibrated as an intelligent feedback three-phase power supply system;

[0007] Running an intelligent feedback three-phase power supply system, calculating the three-phase unbalance and 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 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 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.

[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 a three-phase power supply that needs to be balanced and calibrate it as a 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] Acquire 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, determine 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 mark it as a target construction element;

[0013] Acquire a big data network, retrieve all connection schemes between the target construction element and the 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 screen out connection schemes to be analyzed in which the voltage monitoring sensor and the current monitoring sensor in the target structural element after connection cannot monitor the voltage and current of the target three-phase power supply in real time, so as to obtain the target connection scheme;

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

[0016] Further, 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, the current monitoring sensor, the variable load and the intelligent control unit in the target structural element are calibrated as the target voltage monitoring sensor, the target current monitoring sensor, the target variable load and the 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, the target voltage monitoring sensor and the target current monitoring sensor are used to monitor in real time the phase voltage and phase current of different phases of the target three-phase power supply when it is working;

[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 unbalance of the target power source is maintained within the three-phase maximum unbalance threshold, the target three-phase power source is calibrated as outputting a preliminary qualified three-phase power source;

[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 to combine 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] Further, 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 result, the target three-phase power supply is subjected to balanced output distribution to obtain a qualified three-phase power supply, specifically:

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

[0027] Based on the phase difference between the phase voltage and the phase current in different phases of the target three-phase power supply, the active power and the apparent power of different phases in the target three-phase power supply are calculated in combination with the phase voltage and the phase current of different phases in the target three-phase power supply, and based on the active power and the apparent power of different phases in the target three-phase power supply, the power factor of different phases in the target three-phase power supply is calculated;

[0028] Presetting a power factor threshold, and importing the power factor threshold into a target intelligent control unit in an 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] Wherein, 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 there is an abnormal phase in the target three-phase power supply, but the target three-phase power supply is an output abnormal three-phase power supply, a reactive compensation device is introduced, and the reactive compensation device is used 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, and a qualified three-phase power supply is obtained.

[0033] Further, in a preferred embodiment of the present invention, the operation of the intelligent feedback three-phase power supply system monitors and pre-processes 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 performs operation feasibility analysis and maintenance on the intelligent feedback three-phase power supply system, specifically:

[0034] The intelligent feedback three-phase power supply system is operated, and based on the target voltage monitoring sensor and the target current monitoring sensor, the voltage parameters and current parameters of each power system circuit element in the intelligent feedback three-phase power supply system are monitored in real time, and calibrated into real-time voltage parameters and real-time current parameters;

[0035] Analyze 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 the power rated parameter range of the qualified three-phase power output, wherein the power rated parameter range of the qualified three-phase power output includes the voltage rated parameter range and the current rated parameter range;

[0036] If not, the load adjustable range value of the target variable load is obtained, and it is determined 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, the load value of the target variable load is adjusted 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 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 source 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 source tracing results.

[0039] Further, in a preferred embodiment of the present invention, the fault analysis and tracing of all abnormal power system circuit elements, and the fault repair of the abnormal power system circuit elements 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] Introducing the grey correlation method, performing correlation analysis on the real-time voltage parameters and real-time current parameters of different abnormal power system circuit element combinations, calculating the grey correlation values ​​between different abnormal power system circuit elements, marking them as the first correlation values, and presetting the standard correlation values;

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

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

[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] 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 comprising a memory and a processor, the memory storing a three-phase power supply balanced output method, and 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 supply parameter feedback, calibrated as an intelligent feedback three-phase power supply system;

[0047] Running an intelligent feedback three-phase power supply system, calculating the three-phase unbalance and 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 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 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.

[0049] The present invention solves the technical defects existing in the background technology, and the present invention has the following beneficial effects: constructing an intelligent feedback three-phase power supply system, which is used to determine the three-phase imbalance and power factor of the three-phase power supply, and based on the three-phase imbalance and power factor of the target three-phase power supply, the three-phase power supply is balanced for output, and other circuit elements in the intelligent feedback three-phase power supply system are analyzed and repaired for operation feasibility. The present invention can realize 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. 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, drawings of other embodiments can be obtained based on these drawings without paying creative work.

[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 balanced output system with intelligent feedback regulation is shown. DETAILED DESCRIPTION

[0054] In order to more clearly understand the above-mentioned purpose, 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 the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[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 protection scope 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, and calibrate the system as an intelligent feedback three-phase power supply system;

[0058] S104: running the intelligent feedback three-phase power supply system, calculating 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 a three-phase power supply that needs to be balanced and calibrate it as a 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] Acquire 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, determine 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 mark it as a target construction element;

[0064] Acquire a big data network, retrieve all connection schemes between the target construction element and the 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 screen out connection schemes to be analyzed in which the voltage monitoring sensor and the current monitoring sensor in the target structural element after connection cannot monitor the voltage and current of the target three-phase power supply in real time, so as to obtain the target connection scheme;

[0066] Based on the target connection scheme, all target construction 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, it is necessary to build a three-phase power supply system that can provide power supply parameter feedback 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. To build an intelligent feedback three-phase power supply system, a variety of structural elements and three-phase power supplies are required, so 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 scheme is screened, and the connection scheme output in which the sensor in the structural element can play a role is selected to obtain an intelligent feedback three-phase power supply system.

[0068] Further, in a preferred embodiment of the present invention, the operation of the intelligent feedback three-phase power supply system monitors and pre-processes 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 performs operation feasibility analysis and maintenance on the intelligent feedback three-phase power supply system, specifically:

[0069] The intelligent feedback three-phase power supply system is operated, and based on the target voltage monitoring sensor and the target current monitoring sensor, the voltage parameters and current parameters of each power system circuit element in the intelligent feedback three-phase power supply system are monitored in real time, and calibrated into real-time voltage parameters and real-time current parameters;

[0070] Analyze 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 the power rated parameter range of the qualified three-phase power output, wherein the power rated parameter range of the qualified three-phase power output includes the voltage rated parameter range and the current rated parameter range;

[0071] If not, the load adjustable range value of the target variable load is obtained, and it is determined 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, the load value of the target variable load is adjusted 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 elements 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 are calibrated as abnormal power system circuit elements.

[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. In order to ensure that the intelligent feedback three-phase power supply system can work normally, other circuit elements in the system also need to be maintained at a normal working level. Therefore, the voltage parameters and current parameters of each power system circuit element in the intelligent feedback three-phase power supply system are analyzed, and the feasibility of operation is judged based on the analysis results. The output parameters of the qualified three-phase power supply correspond to the output parameters of different circuit elements in the system, and the output parameters of the circuit elements cannot exceed the rated parameter range of the power supply of the qualified three-phase power supply. If the voltage parameters and current parameters of the components are not maintained within the rated parameter range of the power supply of the qualified three-phase power supply, first determine that the target variable load may be abnormal. Determine whether the target variable load is within the standard range. If not, adjust the variable load, and determine whether the voltage parameters and current parameters of the components are still not maintained within the rated parameter range of the power supply of the qualified three-phase power supply after the load adjustment. If so, it is determined that the component is abnormal, and fault analysis, tracing and repair are required.

[0074] Further, in a preferred embodiment of the present invention, the fault analysis and tracing of all abnormal power system circuit elements, and the fault repair of the abnormal power system circuit elements 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] Introducing the grey correlation method, performing correlation analysis on the real-time voltage parameters and real-time current parameters of different abnormal power system circuit element combinations, calculating the grey correlation values ​​between different abnormal power system circuit elements, marking them as the first correlation values, and presetting the standard correlation values;

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

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

[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 elements may affect each other. For example, if one abnormal power system circuit element is replaced, it will affect another abnormal power system circuit element and cause a related fault. To determine whether the abnormal power system circuit elements affect each other, it is possible to calculate whether the voltage and current parameters between the abnormal power system circuit elements are associated. For example, if the position of an abnormal power system circuit element is adjusted, the voltage or current parameter of another abnormal power system circuit element will change. Different abnormal power system circuit element combinations are obtained, and the gray correlation value of the voltage and current parameters of different abnormal power system circuit element combinations is calculated using the gray correlation method. If the gray correlation value is greater than the standard value, all abnormal power system circuit elements in the combination are associated and need to be processed in the same way at the same time. Processing the abnormal power system circuit elements includes replacement and overhaul. If all abnormal power system circuit elements in a type of abnormal power system circuit element combination are replaceable elements, they need to be replaced to ensure that no other problems will occur during the replacement process; and the abnormal power system circuit elements that do not have an associated relationship and the replaceable abnormal power system circuit elements are replaced. Because replacement is better 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: Calculate the three-phase imbalance of the target three-phase power supply, and classify 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 three-phase power supply with qualified output.

[0084] Further, 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, the current monitoring sensor, the variable load and the intelligent control unit in the target structural element are calibrated as the target voltage monitoring sensor, the target current monitoring sensor, the target variable load and the 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, the target voltage monitoring sensor and the target current monitoring sensor are used to monitor in real time the phase voltage and phase current of different phases of the target three-phase power supply when it is working;

[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 unbalance of the target power source is maintained within the three-phase maximum unbalance threshold, the target three-phase power source is calibrated as outputting a preliminary qualified three-phase power source;

[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 different phases can be used to determine. The three-phase imbalance calculation method is (maximum phase current-three-phase average current) / three-term average current*100%. Three-phase imbalance will increase the reactive power and line loss of the system and reduce the overall energy efficiency. Severe imbalance may cause protection device errors and affect 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] Further, 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 result, the target three-phase power supply is subjected to balanced output distribution to obtain a qualified three-phase power supply, specifically:

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

[0095] Based on the phase difference between the phase voltage and the phase current in different phases of the target three-phase power supply, the active power and the apparent power of different phases in the target three-phase power supply are calculated in combination with the phase voltage and the phase current of different phases in the target three-phase power supply, and based on the active power and the apparent power of different phases in the target three-phase power supply, the power factor of different phases in the target three-phase power supply is calculated;

[0096] Presetting a power factor threshold, and importing the power factor threshold into a target intelligent control unit in an 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] Wherein, 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 there is an abnormal phase in the target three-phase power supply, but the target three-phase power supply is an output abnormal three-phase power supply, a reactive compensation device is introduced, and the reactive compensation device is used 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, and a qualified three-phase power supply is obtained.

[0101] It should be noted that when the three-phase imbalance is abnormal, the power factor calculation of different phases needs to consider the specific conditions of each phase separately. The 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 needs to be determined, which can be obtained through professional measuring instruments, namely phase difference measuring devices. For each phase, the calculation formula for active power 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 phase in the target three-phase power supply, and I is the phase current of the phase in the target three-phase power supply. Finally, the calculation formula for the power factor of each phase is:

[0106]

[0107] Among them, P is active power, S is apparent power, and PF is power factor. After calculating the power factors of different phases, it is necessary to determine the size of the power factor. If the power factor of the phase is within the power factor threshold, and all phases are, it proves that the power supply is normal. If there is a phase whose power factor is not within the power factor threshold, and the power supply is a three-phase power supply with preliminary qualified output, the power supply can be balanced to output by increasing the output voltage or current of a certain phase, while reducing the output of another phase to balance the load. If the power supply is an abnormal three-phase power supply and there is an abnormal phase, a reactive compensation device is required to directly compensate the power factor, so that its power factor is increased and a qualified three-phase power supply is obtained.

[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 includes a memory 31 and a processor 32, the memory 31 stores a three-phase power supply balanced output method, and 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 supply parameter feedback, calibrated as an intelligent feedback three-phase power supply system;

[0110] Running an intelligent feedback three-phase power supply system, calculating the three-phase unbalance and 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 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 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.

[0112] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope 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 supply parameter feedback, calibrated as an intelligent feedback three-phase power supply system; Running an intelligent feedback three-phase power supply system, calculating the three-phase unbalance and 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 power factor of the target three-phase power supply; 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.

2. According to the three-phase power supply balanced output method with intelligent feedback regulation as described in claim 1, it is characterized in that: The three-phase power supply system capable of providing power supply parameter feedback is calibrated as an intelligent feedback three-phase power supply system, specifically: Obtain a three-phase power supply that needs to be balanced and calibrate it as a 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; Acquire 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, determine 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 mark it as a target construction element; Acquire a big data network, retrieve all connection schemes between the target construction element and the 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 screen out connection schemes to be analyzed in which the voltage monitoring sensor and the current monitoring sensor in the target structural element after connection cannot monitor the voltage and current of the target three-phase power supply in real time, so as to obtain the target connection scheme; Based on the target connection scheme, all target construction elements and the target three-phase power supply are connected to obtain an intelligent feedback three-phase power supply system.

3. According to the three-phase power supply balanced output method with intelligent feedback regulation as described in claim 1, it is 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, the current monitoring sensor, the variable load and the intelligent control unit in the target structural element are calibrated as the target voltage monitoring sensor, the target current monitoring sensor, the target variable load and the 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, the target voltage monitoring sensor and the target current monitoring sensor are used to monitor in real time the phase voltage and phase current of different phases of the target three-phase power supply when it is working; 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; The three-phase unbalance 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 preliminary 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 to combine 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. According to the three-phase power supply balanced output method with intelligent feedback regulation as described in claim 3, it is characterized in that: The target three-phase power supply is subjected to power analysis, and based on the power analysis result, the target three-phase power supply is subjected to balanced output distribution 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 the phase current in different phases of the target three-phase power supply; Based on the phase difference between the phase voltage and the phase current in different phases of the target three-phase power supply, the active power and the apparent power of different phases in the target three-phase power supply are calculated in combination with the phase voltage and the phase current of different phases in the target three-phase power supply, and based on the active power and the apparent power of different phases in the target three-phase power supply, the power factor of different phases in the target three-phase power supply is calculated; Presetting a power factor threshold, and importing the power factor threshold into a target intelligent control unit in an 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; Wherein, 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 there is an abnormal phase in the target three-phase power supply, but the target three-phase power supply is an output abnormal three-phase power supply, a reactive compensation device is introduced, and the reactive compensation device is used 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, and a qualified three-phase power supply is obtained.

5. According to the three-phase power supply balanced output method with intelligent feedback regulation as described in claim 1, it is characterized in that: 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: The intelligent feedback three-phase power supply system is operated, and based on the target voltage monitoring sensor and the target current monitoring sensor, the voltage parameters and current parameters of each power system circuit element in the intelligent feedback three-phase power supply system are monitored in real time, and calibrated into real-time voltage parameters and real-time current parameters; Analyze 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 the power rated parameter range of the qualified three-phase power output, wherein the power rated parameter range of the qualified three-phase power output includes the voltage rated parameter range and the current rated parameter range; If not, the load adjustable range value of the target variable load is obtained, and it is determined 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, the load value of the target variable load is adjusted 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 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; Perform fault analysis and source 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 source tracing results.

6. A three-phase power supply balanced output method with intelligent feedback regulation according to claim 5, characterized in that: The method of performing fault analysis and tracing on all abnormal power system circuit elements, and performing fault repair on the abnormal power system circuit elements based on the fault analysis and tracing results, is specifically as follows: Freely combine different abnormal power system circuit elements to obtain different abnormal power system circuit element combinations; Introducing the grey correlation method, performing correlation analysis on the real-time voltage parameters and real-time current parameters of different abnormal power system circuit element combinations, calculating the grey correlation values ​​between different abnormal power system circuit elements, marking them as the first correlation values, and presetting the standard correlation values; Marking the abnormal power system circuit element combination corresponding to the first correlation value being greater than the standard correlation value as a type of abnormal power system circuit element combination, and marking a type of abnormal power system circuit element combination in which all abnormal power system circuit elements are replaceable elements as a type of replaceable abnormal power system circuit element combination; Replace all abnormal power system circuit elements in the replaceable first-class abnormal power system circuit element combination, and replace the abnormal power system circuit elements that are not in the first-class abnormal power system circuit element combination and are replaceable elements; 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.

7. A three-phase power supply balanced output system with intelligent feedback regulation, characterized in that: The three-phase power supply balanced output system includes a memory and a processor, wherein the memory stores a three-phase power supply balanced output method program, and when the three-phase power supply balanced output method program is executed by the processor, the three-phase power supply balanced output method steps as described in any one of claims 1 to 6 are implemented: Construct a three-phase power supply system that can provide power supply parameter feedback, calibrated as an intelligent feedback three-phase power supply system; Running an intelligent feedback three-phase power supply system, calculating the three-phase unbalance and 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 power factor of the target three-phase power supply; 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.

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