Comprehensive service system and method for power utilization quality of power demand side

Abstract

The invention discloses a power demand side power utilization quality comprehensive service system and method, and relates to the field of power utilization quality comprehensive service, and the system comprises an equipment connection analysis module, an element module, an equipment module, a judgment and early warning module and an adjustment module, and comprises the following steps: carrying out the judgment and analysis of the equipment connection state of a production line, the method comprises the following steps: obtaining an electric quality key value of each device, evaluating elements of the device to obtain an electric quality deviation value for the elements, comparing and analyzing the electric quality deviation value with a set reference threshold value to obtain an element different deviation value of each device, and judging and analyzing three-phase voltage, voltage signals and radiation immunity of the device and harmonic interaction influence between the devices. The power utilization quality of the production line can be judged in multiple directions, the abnormal production line can be early-warned and managed, and the cost is reduced. The average value of the power utilization quality of the whole equipment of the production line is analyzed. The production line is subjected to corresponding early-warning processing. The feasibility of the operation time adjustment of the production line is judged. The power utilization quality of the production line can be judged in multiple directions, and the abnormal production line can be early-warned and managed.

Description

Technical Field

[0001] The present invention relates to the field of comprehensive power quality services, and in particular to a comprehensive power quality service system and method at a power demand side. Background Art

[0002] With the continuous improvement of the power market, it has also achieved great development in commercial operations, industrial production and residents' lives, but at the same time, the problem of power consumption has become more serious. In particular, harmonic interference and voltage fluctuations on industrial production lines lead to production interruptions and equipment failures, increasing maintenance costs and production costs. Traditional passive and decentralized service methods and power management can no longer meet the needs, and the power demand side power quality comprehensive service system has emerged.

[0003] When the existing power demand-side integrated service system is in operation, it is unable to make detailed judgments on the equipment components, voltage and other parameters of the production line, nor can it perform early warning management on abnormal production lines, let alone timely adjust the operating time of adjustable production lines, resulting in frequent production interruptions and equipment failures, increasing maintenance and production costs. Therefore, how to comprehensively judge the power quality of the production line and perform early warning management on production lines with abnormal power quality is a problem that needs to be solved.

[0004] In order to solve the above defects, a technical solution is now provided. Summary of the invention

[0005] In order to solve the technical problems raised by the above background technology, the present invention is proposed. An embodiment of the present invention provides a comprehensive service system for power quality at the power demand side.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A comprehensive service system for power quality on the power demand side, including an equipment connection analysis module, a component module, an equipment module, a judgment and early warning module and an adjustment module.

[0007] The equipment connection analysis module is used to determine and analyze the equipment connection status of the production line to obtain the key value of the electrical quality of each device; The component module is used to evaluate the basic electrical monitoring of the components of the equipment, the movement of component particles, the acoustic characteristics of the components, the physicochemical parameters of the components, the dielectric characteristics of the components and the electrical signal characteristics of the components, obtain the component electrical quality deviation value, and compare and analyze with the set reference threshold value to obtain the component deviation value of each device; The equipment module is used to determine and analyze the three-phase voltage, voltage signal, radiation immunity and harmonic interaction between equipment to obtain the harmonic interference flash value of the equipment; The judgment and early warning module is used to receive the key value of power quality of each device, the component deviation value of each device and the harmonic interference flash value of the device, analyze the average value of power quality of the entire equipment of the production line, and perform corresponding early warning processing on the production line; The adjustment module is used to receive a production line scheduling determination signal and determine the feasibility of adjusting the production line operation time.

[0008] Furthermore, the steps of performing corresponding early warning processing and analysis on the production line are as follows: Substitute the key value SDz of the power quality of each device, the component deviation value Syz of each device and the harmonic interference flash value XRZ of each device into the set formula model ZDZ=ζ×(Syz+XRZ)×SDz to obtain the comprehensive power quality deviation value ZDZ of each device, ζ is the set correction factor coefficient, and the comprehensive power quality deviation value of the equipment in each production line is accumulated and added to obtain the comprehensive power quality deviation key value SYJ of each production line; When the comprehensive power quality difference key value of each production line is in the set comparison interval PQ1, a normal signal of the power quality of the production line is issued; when the comprehensive power quality difference key value of each production line is in the set comparison interval PQ2, an abnormal signal of the power quality of the production line is issued, the production line scheduling judgment signal is executed, and the staff is reminded to take processing measure one; when the comprehensive power quality difference key value of each production line is in the set comparison interval PQ3, a serious abnormal signal of the power quality of the production line is issued, the production line scheduling judgment signal is executed, and the staff is reminded to take processing measure two.

[0009] Furthermore, the harmonic flicker value analysis steps of each device are as follows: Normalize the phase imbalance value XWZ, short flash severity value sdz, radiation immunity KRd, long flash severity value cdz and harmonic interference total value XYz of the equipment according to the set formula , calculate and obtain the harmonic interference flash value XRZ of the equipment, where tp1, tp2, tp3, tp4 and tp5 are the set weight factor coefficients of the phase imbalance value of the equipment, the short flash severity value of the equipment, the radiation immunity of the equipment, the long flash severity value of the equipment and the total harmonic interference value of the equipment respectively.

[0010] Furthermore, the steps for analyzing the equipment short flash severity value, equipment radiation immunity, equipment long flash severity value and equipment harmonic interaction total value are as follows: The voltage signal of the equipment is monitored by the flicker meter within a certain period of time h1. The amplitude modulation signal of the voltage fluctuation is calculated by the square detection method. The amplitude modulation signal is weighted and calculated by integration to obtain the flicker signal energy value, which is multiplied by the correction factor coefficient to obtain the equipment short flash severity value sdz. The equipment short flash severity value within a certain period of time h2 is statistically calculated, and the equipment long flash severity value cdz is calculated according to the formula; by applying a pulse group with a pulse amplitude of 4 kilovolts and a repetition frequency of 100 kilohertz to each device on the production line, the probability value of the equipment malfunction, the increase in the transmission bit error rate and the performance abnormality are statistically added and the inverse is calculated to obtain the radiation immunity KRd of the equipment; the power analyzer is used to obtain the current amplitude and phase difference of equipment E and equipment F in the same power system at the same harmonic order, and the harmonic interference value XY between equipment E and equipment F EF , according to the formula We get: m represents the harmonic order, m is a positive integer greater than or equal to , M is the maximum value of the harmonic order, DF Em and DF Fm are the mth harmonic current amplitudes of device E and device F respectively, Δψm is the phase difference of the mth harmonic of device E and device F, and the harmonic interaction values ​​of device E and other devices in the same power system are obtained and summed, which is marked as the total harmonic interaction value XYz of the equipment.

[0011] Furthermore, the phase imbalance value analysis steps of the device are as follows: Get the three-phase voltage Ux, Uy, Uz of each equipment in the production line, the positive sequence components Ux1, Uy1, Uz1, the negative sequence components Ux2, Uy2, Uz2, and the zero sequence components Ux0, Uy0, Uz0, establish the equation, calculate the inverse matrix of the coefficient matrix, get the inverse matrix, multiply the inverse matrix with the voltage vector matrix to get Ux0, Ux1, Ux2, and get Uy1, Uz1, Uy2, Uz2, Uy0, Uz0 according to the symmetry relationship. The positive sequence components and negative sequence components are obtained according to the formula Ut1,2=T1,2×e jψt1，2 , t represents the three-phase voltage x or y or z, T1,2 represents the amplitude of the three-phase voltage x or y or z in the positive sequence component or negative sequence component respectively, and the positive sequence voltage phase or negative sequence phase ψt1,2 is obtained according to the formula Ux0=X0×e jψ0, the zero-sequence voltage phase ψ0 is obtained, X0 represents the zero-sequence voltage amplitude, and the phase differences Δψx, Δψy and Δψz of the three-phase voltages x, y and z are obtained according to the formulas Δψx=|ψx1-ψx2|, Δψy=|ψy1-ψy2| and Δψz=|ψz1-ψz2|. According to the formula XWZ=w1×(Δψx+Δψy+Δψz)+w2×|ψz1-ψ0|+w3×|ψx1-ψ0|+w4×|ψy1-ψ0|, the phase unbalance value XWZ of the equipment is obtained, where w1, w2 and w3 are the set weight factor coefficients.

[0012] Furthermore, the steps for analyzing the component deviation values ​​of each device are as follows: The component base electrical distortion value, component particle dynamic dispersion value, component acoustic characteristic value, component dielectric wave variation value, component physicochemical variation value and component electrical characteristic detuning value are normalized, and processed according to the graph construction to obtain the component power quality deviation value, and the component power quality deviation value is compared with the set reference threshold value. When the component power quality deviation value is greater than the set reference threshold value, the corresponding component is an abnormal power component, when the component power quality deviation value is equal to the set reference threshold value, the corresponding component is a standard power component, and when the component power quality deviation value is less than the set reference threshold value, the corresponding component is a good power component. The number of abnormal power components, standard power components and good power components in each equipment of the production line is obtained, and the proportion of abnormal power components, standard power components and good power components in each equipment of the production line is counted, and the component power quality deviation values ​​of the corresponding components of each equipment are summed to obtain the total component power quality deviation value Ypz of each equipment, and the component deviation value Syz of each equipment is calculated.

[0013] Furthermore, the steps for analyzing the acoustic characteristic value of the component, the dielectric wave loss value of the component, the physical and chemical variation value of the component, and the telecommunication characteristic detuning value of the component are as follows: The acoustic characteristic of a component refers to the acquisition of the sound signal of the component by an acoustic sensor, and the conversion into a frequency domain signal by fast Fourier transform, and the acquisition of the amplitude change rate and the frequency bandwidth change rate in the frequency domain signal to obtain the acoustic characteristic value of the component by summing them up; the physicochemical parameter of the component refers to the sum of the cyclic voltammetric value of the component and the physical parameter change value of the component to obtain the physical and chemical change value of the component, and the physical parameter change value of the component refers to the sum of the maximum vibration acceleration, pressure fluctuation amplitude and maximum strain value of the component; the dielectric characteristic of the component refers to the sum of the dielectric constant change rate, dielectric loss factor and filter frequency offset of the component to obtain the dielectric wave loss value of the component; the electrical signal characteristics of the component It means collecting the voltage and electrical signals of the component to obtain the transient characteristics, pulse width, rising edge time and falling edge time in the time domain, adding the transient characteristics and pulse width and dividing them by the sum of the rising edge time and the falling edge time to obtain the component electrical time drop value, converting the time domain signal into a frequency domain signal by Fourier series, obtaining the corresponding amplitude when the frequency is greater than n times the set frequency, calculating the sum of the amplitudes, and marking it as the harmonic content value, where n is a positive integer greater than or equal to 2, performing weighted calculation on the component electrical time drop value and the harmonic content value, and multiplying them by the corresponding proportional factor coefficient to obtain the component electrical characteristic drop harmonic value.

[0014] Furthermore, the steps for analyzing the component-based electrical distortion loss value and the component particle dynamic dispersion value are as follows: Basic electrical monitoring of components refers to component power consumption, power factor, voltage total harmonic distortion rate, and transient voltage. The power consumption, voltage total harmonic distortion rate, and transient voltage of the component are summed and divided by the power factor to obtain the basic electrical distortion value of the component. The movement of component particles refers to applying a magnetic field perpendicular to the current direction of the component, measuring the Hall voltage, current, and magnetic field strength, obtaining the thickness hd of the component, analyzing and obtaining the Hall coefficient Hx, obtaining the electron charge dh, calculating the electron concentration dn, obtaining the resistivity dc, and calculating the carrier mobility qy. According to the formula, the carrier diffusion coefficient Kx is obtained. In the component, the spectrum of the emitted light is measured, and the wavelength distribution of the light is obtained using a spectrometer. The inverse of the obtained light wavelength is calculated and multiplied by the correction factor coefficient to obtain the quantum energy level dispersion degree Ls. The carrier mobility qy, the carrier diffusion coefficient Kx, and the quantum energy level dispersion degree Ls are calculated to obtain the component particle dispersion value Sl.

[0015] Furthermore, the steps for analyzing the key values ​​of power quality of each device are as follows: Mark each device in the production line as a network node to form a production line network, obtain each connection path in the production line network, and obtain the shortest path of all node pairs, count the frequency value of each device in all shortest paths, mark it as the intermediate frequency value of each device, obtain the number of devices in the production line network, and calculate the connection center value of each device; construct an adjacency matrix of the production line equipment node network, obtain the number of direct connections between each device and all devices in the adjacency matrix of the node network, mark it as the connection center value of each device, weight the intermediate frequency value of each device, the connection center value of each device and the connection center value of each device, and multiply it by the corresponding correction factor coefficient to obtain the key value SDz of the electrical quality of each device in the production line.

[0016] Furthermore, the feasibility of adjusting the production line operation time is determined and analyzed in the following steps: The total number of workers ZR and wages DY of the production line are obtained, the average wage subsidy coefficient r1 after adjusting the working time, the night working efficiency reduction value r2, the per capita value of night meal subsidy Cb, the peak electricity price Gd, the off-peak electricity price Dd, the operating time YT and the production line equipment power Sg are normalized with the comprehensive power quality heterogeneity key value SYJ of each production line, and the feasible value KZZ of each production line scheduling is obtained according to the formula. When the feasible value of each production line scheduling is greater than or equal to the set threshold, it is determined that the production line can adjust the working time.

[0017] Furthermore, a method for comprehensive service of power quality on the power demand side includes the following steps: Step 1: Determine and analyze the equipment connection status of the production line to obtain the key value of the electrical quality of each device; Step 2: Evaluate the basic electrical monitoring of the equipment's components, component particle movement, component acoustic characteristics, component physicochemical parameters, component dielectric characteristics, and component electrical signal characteristics to obtain the component electrical quality deviation value, and compare and analyze it with the set reference threshold to obtain the component deviation value of each device; Step 3: Analyze and judge the three-phase voltage, voltage signal, radiation immunity and harmonic interaction between devices to obtain the harmonic interference flash value of the equipment; Step 4: Analyze the average power quality of the entire production line equipment and carry out corresponding early warning processing for the production line; Step 5: Determine the feasibility of adjusting the production line operation time.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention determines and analyzes the equipment connection status of the production line to obtain the key value of the power quality of each device, evaluates the basic electrical monitoring of the equipment components, the movement of component particles, the acoustic characteristics of the components, the physicochemical parameters of the components, the dielectric characteristics of the components and the electrical signal characteristics of the components, obtains the component power quality deviation value, and compares and analyzes it with the set reference threshold value to obtain the component deviation value of each device, determines and analyzes the three-phase voltage, voltage signal, radiation immunity and harmonic interaction between the equipment, and obtains the harmonic interference flicker value of the equipment. The power quality of the production line can be determined from the aspects of the equipment connection status, equipment components, equipment voltage and harmonic interaction between the equipment, thereby increasing the accuracy of the judgment.

[0019] 2. The present invention analyzes the average value of the power quality of the entire equipment of the production line, performs corresponding early warning processing on the production line, determines the feasibility of adjusting the operation time of the production line, can perform early warning management on abnormal production lines, can timely adjust the operation time of adjustable production lines, reduce production interruptions and equipment failures, and reduce maintenance costs and production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. The following drawings are not intentionally scaled according to the actual sizes, and the focus is on illustrating the main purpose of the present invention.

[0021] Figure 1 It is a system block diagram of the present invention. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work also fall within the scope of protection of the present invention.

[0023] like Figure 1 As shown, a comprehensive service system for power quality on the power demand side includes an equipment connection analysis module, a component module, an equipment module, a judgment and early warning module, and an adjustment module.

[0024] The equipment connection analysis module is used to determine and analyze the equipment connection status of the production line and obtain the key value of the electrical quality of each device. The specific analysis is as follows: Mark each device in the production line as a network node to form a production line network, obtain each connection path in the production line network, and obtain the shortest path of all node pairs. Count the frequency values ​​of each device in all shortest paths, mark them as the intermediate frequency value of each device, obtain the number of devices in the production line network, mark them as m, and the intermediate distance value Jz of each device i , according to the set formula Calculated, where i and j are the serial numbers of the equipment, i and j are positive integers, and the maximum values ​​are both m, dj (i, j) refers to the shortest distance value from equipment node i to equipment node j. If equipment node j and equipment node i are on the same line, the shortest distance value is 1. If equipment node j and equipment node i are not on the same line, obtain the number of transfers from equipment node i to equipment node j, and add 1 to the number of transfers to obtain the shortest distance value from equipment node i to equipment node j; construct the adjacency matrix of the production line equipment node network, obtain the number of direct connections between each device and all devices in the adjacency matrix of the node network, mark it as the connection center value of each device, and weight the intermediate frequency value of each device, the connection distance value of each device, and the connection center value of each device. Calculate and multiply by the corresponding correction factor coefficient to obtain the key value SDz of the power quality of each device in the production line. It should be noted that the higher the key value of the power quality of the equipment, the greater the impact on the production status of the enterprise production line; The component module is used to evaluate the basic electrical monitoring of the equipment's components, component particle movement, component acoustic characteristics, component physicochemical parameters, component dielectric characteristics and component electrical signal characteristics, obtain the component electrical quality deviation value, and compare and analyze it with the set reference threshold value to obtain the component deviation value of each device. The specific analysis is as follows: The power consumption quality of components in the production line equipment is evaluated through basic electrical monitoring of the components, movement of component particles, acoustic characteristics of components, physical and chemical parameters of components, dielectric characteristics of components and electrical signal characteristics of components. Basic electrical monitoring of components refers to power consumption, power factor, total harmonic distortion rate of voltage and transient voltage of components. The power consumption, total harmonic distortion rate of voltage and transient voltage of components are summed and divided by the power factor to obtain the basic electrical distortion value of components. Movement of component particles refers to applying a magnetic field perpendicular to the direction of current on the component, measuring the Hall voltage, current and magnetic field strength, and marking them as dy, dl and cq respectively, to obtain the thickness hd of the component, and according to the formula Hx=dy×hd / (dl×cq), the Hall The coefficient Hx is used to obtain the electron charge dh. According to the formula dn=1 / (Hx×dh), the electron concentration dn is calculated to obtain the resistivity dc. According to the formula qy=Hx / dc, the carrier mobility qy is obtained. According to the formula Kx=β×qy / dh, the carrier diffusion coefficient Kx is obtained. β is the correction factor coefficient. By measuring the spectrum of the emitted light in the component, the wavelength distribution of the light is obtained using a spectrometer. The inverse of the obtained light wavelength is calculated and multiplied by the correction factor coefficient to obtain the quantum energy level dispersion Ls. The carrier mobility qy, the carrier diffusion coefficient Kx and the quantum energy level dispersion Ls are normalized and substituted into the set formula Sl=b1×(Ls-B1). 2 / (b2×qy+b3×Kx), calculate the component particle dynamic dispersion value Sl, where b1, b2 and b3 are the set weight factor coefficients of quantum energy level discreteness, carrier mobility and carrier diffusion coefficient, and the values ​​are 1.02, 2.14 and 1.88 respectively, and B1 is the set reference component particle dynamic dispersion value; the component acoustic characteristic refers to the sound signal of the component collected by the acoustic sensor, and converted into a frequency domain signal by fast Fourier transform, and the amplitude change rate and frequency bandwidth change rate in the frequency domain signal are obtained and summed to obtain the component acoustic characteristic value, where the change rate refers to the change value of the amplitude and frequency bandwidth within a certain period of time, and the frequency bandwidth is the maximum frequency minus the minimum frequency; the component physicochemical parameter refers to the sum of the cyclic voltammetric anomaly of the component and the physical parameter change value of the component to obtain the component physicochemical anomaly value, where the cyclic voltammetric anomaly of the component refers to the sum of the component resistance growth rate and the component capacitance retention rate. Ratio, the physical parameter variation value of the component refers to the sum of the maximum vibration acceleration, pressure fluctuation amplitude and maximum strain value of the component; the dielectric property of the component refers to the sum of the dielectric constant change rate, dielectric loss factor and filter frequency offset of the component to obtain the dielectric wave variation value of the component; the electrical signal characteristic of the component refers to the acquisition of the transient characteristics, pulse width, rising edge time and falling edge time in the time domain by collecting the voltage and electrical signals of the component, adding the transient characteristics and pulse width and dividing them by the sum of the rising edge time and the falling edge time to obtain the electrical time drop value of the component, converting the time domain signal into the frequency domain signal by Fourier series, obtaining the corresponding amplitude when the frequency is greater than n times the set frequency, calculating the sum of the amplitudes, and marking it as the harmonic content value, where n is a positive integer greater than or equal to 2, weighting the electrical time drop value of the component and the harmonic content value, and multiplying them by the corresponding proportional factor coefficient to obtain the electrical characteristic drop harmonic value of the component; The basic electrical distortion loss value of the component, the dynamic dispersion value of the component particles, the acoustic characteristic value of the component, the dielectric wave loss value of the component, the physicochemical variation value of the component and the electrical characteristic detuning value of the component are normalized. The sum of the basic electrical distortion loss value of the component and the dynamic dispersion value of the component particles is taken as the radius of the circular diameter of the upper top surface of the frustum, the sum of the acoustic characteristic value of the component and the dielectric wave loss value of the component is taken as the radius of the circular diameter of the lower bottom surface of the frustum, the physicochemical variation value of the component is taken as the height of the frustum, and the frustum is established. The point of the circle on the upper top surface of the frustum is taken as the center point of the cube, and the electrical characteristic detuning value of the component is taken as the side length of the cube to establish a cube. The irregular volume formed by the frustum and the cube is identified and marked as the electrical quality deviation value of the component. The electrical quality deviation value of the component is compared with the set reference threshold. When the component is used When the power quality deviation is greater than the set reference threshold, the corresponding component is an abnormal power consumption component. When the power quality deviation of the component is equal to the set reference threshold, the corresponding component is a standard power consumption component. When the power quality deviation of the component is less than the set reference threshold, the corresponding component is a good power consumption component. The number of abnormal power consumption components, standard power consumption components and good power consumption components in each device of the production line is obtained, marked as YY, GY and LY, and the proportion of abnormal power consumption components, standard power consumption components and good power consumption components in each device of the production line is counted, marked as ZYY, ZGY and ZLY, and the power quality deviation values ​​of the corresponding components of each device are summed to obtain the total power quality deviation value Ypz of each device. According to the set formula model , calculate and obtain the component deviation value Syz of each device, where tp1, tp2, tp3 and tp4 are set correction factor coefficients to promote the accuracy of calculation. The specific values ​​are determined by personnel in this professional field, and e is a natural constant with a value of 2.718; The equipment module is used to determine and analyze the three-phase voltage, voltage signal, radiation immunity and harmonic interaction between equipment to obtain the harmonic interference flash value of the equipment. The specific analysis is as follows: Obtain the three-phase voltage Ux, Uy, Uz, positive sequence components Ux1, Uy1, Uz1, negative sequence components Ux2, Uy2, Uz2, zero sequence components Ux0, Uy0, Uz0 of each device on the production line, and establish the equation , where g = e j120° , g 2 =e j120° , j is the imaginary unit, j 2 =-1, calculate The inverse matrix of the coefficient matrix gives the inverse matrix , multiply the inverse matrix by the voltage vector matrix to obtain Ux0, Ux1, and Ux2, where Ux0 = 1 / 3 × (Ux + Uy + Uz), Ux1 = 1 / 3 × (Ux + g × Uy + g 2 ×Uz), Ux2=1 / 3×(Ux+g 2×Uy+g×Uz), according to the symmetry relationship, we can get Uy1, Uz1, Uy2, Uz2, Uy0, Uz0, where Uy1=g 2 ×Ux1, Uz1=g×Ux1, Uy2=g×Ux2, Uz2=g 2 ×Ux2, Uy0=Ux0, Uz0=Ux0, and the obtained positive sequence components and negative sequence components are calculated according to the formula Ut1,2=T1,2×e jψt1，2 , t represents the three-phase voltage x or y or z, T1,2 represents the amplitude of the three-phase voltage x or y or z in the positive sequence component or negative sequence component respectively, and the positive sequence voltage phase or negative sequence phase ψt1,2 is obtained according to the formula Ux0=X0×e jψ0 , get the zero-sequence voltage phase ψ0, X0 represents the zero-sequence voltage amplitude, according to the formulas Δψx=|ψx1-ψx2|, Δψy=|ψy1-ψy2| and Δψz=|ψz1-ψz2|, get the phase differences Δψx, Δψy and Δψz of the three-phase voltages x, y and z, according to the formula XWZ=w1×(Δψx+Δψy+Δψz)+w2×|ψz1-ψ0|+w3×|ψx1-ψ0|+w4×|ψy1-ψ0|, get the phase unbalance value XWZ of the equipment, where w1, w2 and w3 are the set weight factor coefficients; The voltage signal of the equipment is monitored by the flicker meter within a certain time h1. The amplitude modulation signal of the voltage fluctuation is calculated by the square detection method. The amplitude modulation signal is weighted and calculated by integration. The flicker signal energy value is obtained and multiplied by the correction factor coefficient to obtain the equipment short flash severity value sdz, where h1 is ten minutes. The short flash severity value of the equipment within a certain time h2 is calculated, where h2 is 3 hours. According to the formula , get the equipment long flash severity value cdz, where q is the number of certain time h1 included in a certain time h2, q=1, 2, ..., Q, Q is the maximum value of the quantity value; by applying a pulse group with a pulse amplitude of 4 kilovolts and a repetition frequency of 100 kilohertz to each device on the production line, the probability value of equipment malfunction, the increase value of transmission bit error rate and the performance abnormality are added and the inverse is calculated to get the equipment's radiation immunity KRd, where the performance abnormality refers to the number of times the equipment freezes, restarts and data is lost within a certain period of time; the current amplitude and phase difference of equipment E and equipment F in the same power system at the same harmonic order are obtained through a power analyzer, and the harmonic interaction value XY between equipment E and equipment F is obtained. EF , according to the formula We get: m represents the harmonic order, m is a positive integer greater than or equal to , M is the maximum value of the harmonic order, DF Em and DF Fmare the mth harmonic current amplitudes of device E and device F respectively, Δψm is the phase difference between the mth harmonics of device E and device F, and the harmonic interaction values ​​of device E and other devices in the same power system are obtained and summed, which is marked as the total harmonic interaction value XYz of the device; Normalize the phase imbalance value XWZ, short flash severity value sdz, radiation immunity KRd, long flash severity value cdz and harmonic interference total value XYz of the equipment according to the set formula , calculate and obtain the harmonic interference flash value XRZ of the equipment, where tp1, tp2, tp3, tp4 and tp5 are respectively the set weight factor coefficients of the phase imbalance value of the equipment, the short flash severity value of the equipment, the radiation immunity of the equipment, the long flash severity value of the equipment and the total harmonic interference value of the equipment. The specific values ​​are determined by personnel in this professional field; The judgment and early warning module is used to receive the key values ​​of power quality of each device, the component deviation values ​​of each device and the harmonic interference flash values ​​of the device, analyze the average value of the power quality of the entire equipment of the production line, and perform corresponding early warning processing on the production line. The specific analysis is as follows: Substitute the key value SDz of the power quality of each device, the component deviation value Syz of each device and the harmonic interference flash value XRZ of each device into the set formula model ZDZ=ζ×(Syz+XRZ)×SDz to obtain the comprehensive power quality deviation value ZDZ of each device, ζ is the set correction factor coefficient, and the comprehensive power quality deviation value of the equipment in each production line is accumulated and added to obtain the comprehensive power quality deviation key value SYJ of each production line; Compare and analyze the comprehensive electrical quality difference key values ​​of each production line with the set comparison intervals PQ1, PQ2 and PQ3, where the comparison intervals PQ1, PQ2 and PQ3 increase in gradient; When the comprehensive power quality difference key value of each production line is in the set comparison interval PQ1, a normal power quality signal of the production line is issued; when the comprehensive power quality difference key value of each production line is in the set comparison interval PQ2, an abnormal power quality signal of the production line is issued, and the production line scheduling judgment signal is executed, and the staff is reminded to add voltage stabilizers and passive filters, and conduct an overall inspection of the power supply line; when the comprehensive power quality difference key value of each production line is in the set comparison interval PQ3, a serious abnormal power quality signal of the production line is issued, and the production line scheduling judgment signal is executed, and the staff is reminded to add dynamic voltage restorers, automatic three-phase balancing devices, active power filters, and conduct a detailed inspection of the power supply line.

[0025] The adjustment module is used to receive the production line scheduling determination signal and determine the feasibility of adjusting the production line operation time. The specific analysis is as follows: The production lines whose comprehensive electrical quality heterogeneity key values ​​are within the set comparison intervals PQ2 and PQ3 are analyzed as follows: Obtain the total number of workers ZR and wages DY of the production line, the average wage subsidy coefficient r1 after adjusting the working time, the night working efficiency reduction value r2, the night meal subsidy per capita Cb, the peak electricity price Gd, the off-peak electricity price Dd, the operating time YT and the production line equipment power Sg, and normalize them with the comprehensive power quality heterogeneity key value SYJ of each production line. According to the formula , and obtain the feasible value KZZ of each production line scheduling, where cg1, cg2, cg3, and cg4 are the set correction factor coefficients, and r3 is the set equipment interference reduction coefficient during the off-peak period. The larger the comprehensive electrical quality key value of the production line is, the more the equipment life of the production line will increase after adjusting the working time. When the feasible value of each production line scheduling is greater than or equal to the set threshold, it is determined that the production line can adjust the operating time, otherwise, it will not be adjusted.

[0026] A comprehensive service method for power quality on the power demand side includes the following steps: Step 1: Determine and analyze the equipment connection status of the production line to obtain the key value of the electrical quality of each device; Step 2: Evaluate the basic electrical monitoring of the equipment's components, component particle movement, component acoustic characteristics, component physicochemical parameters, component dielectric characteristics, and component electrical signal characteristics to obtain the component electrical quality deviation value, and compare and analyze it with the set reference threshold to obtain the component deviation value of each device; Step 3: Analyze and judge the three-phase voltage, voltage signal, radiation immunity and harmonic interaction between devices to obtain the harmonic interference flash value of the equipment; Step 4: Analyze the average power quality of the entire production line equipment and carry out corresponding early warning processing for the production line; Step 5: Determine the feasibility of adjusting the production line operation time.

[0027] The above is an explanation of the present invention and should not be considered as a limitation thereof. Although several exemplary embodiments of the present invention have been described, it will be readily appreciated by those skilled in the art that many modifications may be made to the exemplary embodiments without departing from the novel teachings and advantages of the present invention. Therefore, all such modifications are intended to be included within the scope of the present invention as defined in the claims. It should be understood that the above is an explanation of the present invention and should not be considered as being limited to the specific embodiments disclosed, and modifications to the disclosed embodiments and other embodiments are intended to be included within the scope of the appended claims. The present invention is defined by the claims and their equivalents.

Claims

1. A comprehensive service system for power quality on the power demand side, characterized in that: include: The equipment connection analysis module is used to determine and analyze the equipment connection status of the production line and obtain the key value of the electrical quality of each device; The component module is used to evaluate the basic electrical monitoring of the equipment's components, the movement of component particles, the acoustic characteristics of the components, the physicochemical parameters of the components, the dielectric characteristics of the components, and the electrical signal characteristics of the components, and obtain the component electrical quality deviation value, and compare and analyze it with the set reference threshold value to obtain the component deviation value of each device; The equipment module is used to determine and analyze the three-phase voltage, voltage signal, radiation immunity and harmonic interaction between equipment to obtain the harmonic interference flash value of the equipment; The judgment and early warning module is used to receive the key values ​​of power quality of each device, the component deviation values ​​of each device and the harmonic interference and flash values ​​of the device, analyze the average value of power quality of the entire equipment of the production line, and perform corresponding early warning processing on the production line; The adjustment module is used to receive the production line scheduling determination signal and determine the feasibility of adjusting the production line operation time.

2. According to claim 1, a comprehensive service system for power quality on the power demand side is characterized in that: The steps for performing corresponding early warning processing and analysis on the production line are as follows: Substitute the key value SDz of the power quality of each device, the component deviation value Syz of each device and the harmonic interference flash value XRZ of each device into the set formula model ZDZ=ζ×(Syz+XRZ)×SDz to obtain the comprehensive power quality deviation value ZDZ of each device, ζ is the set correction factor coefficient, and the comprehensive power quality deviation value of the equipment in each production line is accumulated and added to obtain the comprehensive power quality deviation key value SYJ of each production line; When the comprehensive power quality difference key value of each production line is in the set comparison interval PQ1, a normal power quality signal of the production line is issued; when the comprehensive power quality difference key value of each production line is in the set comparison interval PQ2, an abnormal power quality signal of the production line is issued, the production line scheduling judgment signal is executed, and the staff is reminded to take processing measure one; when the comprehensive power quality difference key value of each production line is in the set comparison interval PQ3, a serious abnormal power quality signal of the production line is issued, the production line scheduling judgment signal is executed, and the staff is reminded to take processing measure two.

3. The power demand side power quality integrated service system according to claim 2, characterized in that: The steps for analyzing the harmonic flash value of each device are as follows: Normalize the phase imbalance value XWZ, short flash severity value sdz, radiation immunity KRd, long flash severity value cdz and harmonic interference total value XYz of the equipment according to the set formula , calculate and obtain the harmonic interference flash value XRZ of the equipment, where tp1, tp2, tp3, tp4 and tp5 are the set weight factor coefficients of the phase imbalance value of the equipment, the short flash severity value of the equipment, the radiation immunity of the equipment, the long flash severity value of the equipment and the total harmonic interference value of the equipment respectively.

4. The power demand side power quality integrated service system according to claim 3, characterized in that: The analysis steps of the equipment short flash severity value, equipment radiation immunity, equipment long flash severity value and equipment harmonic interference total value are as follows: The voltage signal of the equipment is monitored by the flicker meter within a certain period of time h1. The amplitude modulation signal of the voltage fluctuation is calculated by the square detection method. The amplitude modulation signal is weighted and calculated by integration to obtain the flicker signal energy value, which is multiplied by the correction factor coefficient to obtain the equipment short flash severity value sdz. The equipment short flash severity value within a certain period of time h2 is statistically calculated, and the equipment long flash severity value cdz is calculated according to the formula; by applying a pulse group with a pulse amplitude of 4 kilovolts and a repetition frequency of 100 kilohertz to each device on the production line, the probability value of the equipment malfunction, the increase in the transmission bit error rate and the performance abnormality are statistically added and the inverse is calculated to obtain the radiation immunity KRd of the equipment; the power analyzer is used to obtain the current amplitude and phase difference of equipment E and equipment F in the same power system at the same harmonic order, and the harmonic interference value XY between equipment E and equipment F EF , according to the formula We get: m represents the harmonic order, m is a positive integer greater than or equal to , M is the maximum value of the harmonic order, DF Em and DF Fm are the mth harmonic current amplitudes of device E and device F respectively, Δψm is the phase difference of the mth harmonic of device E and device F, and the harmonic interaction values ​​of device E and other devices in the same power system are obtained and summed, which is marked as the total harmonic interaction value XYz of the equipment.

5. The power demand side power quality integrated service system according to claim 3, characterized in that: The steps for analyzing the phase imbalance value of the device are as follows: Get the three-phase voltage Ux, Uy, Uz of each equipment in the production line, the positive sequence components Ux1, Uy1, Uz1, the negative sequence components Ux2, Uy2, Uz2, and the zero sequence components Ux0, Uy0, Uz0, establish the equation, calculate the inverse matrix of the coefficient matrix, get the inverse matrix, multiply the inverse matrix with the voltage vector matrix to get Ux0, Ux1, Ux2, and get Uy1, Uz1, Uy2, Uz2, Uy0, Uz0 according to the symmetry relationship. The positive sequence components and negative sequence components are obtained according to the formula Ut1,2=T1,2×e jψt1，2 , t represents the three-phase voltage x or y or z, T1,2 represents the amplitude of the three-phase voltage x or y or z in the positive sequence component or negative sequence component respectively, and the positive sequence voltage phase or negative sequence phase ψt1,2 is obtained according to the formula Ux0=X0×e jψ0 , the zero-sequence voltage phase ψ0 is obtained, X0 represents the zero-sequence voltage amplitude, and the phase differences Δψx, Δψy and Δψz of the three-phase voltages x, y and z are obtained according to the formulas Δψx=|ψx1-ψx2|, Δψy=|ψy1-ψy2| and Δψz=|ψz1-ψz2|. According to the formula XWZ=w1×(Δψx+Δψy+Δψz)+w2×|ψz1-ψ0|+w3×|ψx1-ψ0|+w4×|ψy1-ψ0|, the phase unbalance value XWZ of the equipment is obtained, where w1, w2 and w3 are the set weight factor coefficients.

6. The power demand side power quality integrated service system according to claim 2, characterized in that: The steps for analyzing the component deviation values ​​of each device are as follows: The component base electrical distortion value, component particle dynamic dispersion value, component acoustic characteristic value, component dielectric wave variation value, component physicochemical variation value and component electrical characteristic detuning value are normalized, and processed according to the graph construction to obtain the component power quality deviation value, and the component power quality deviation value is compared with the set reference threshold value. When the component power quality deviation value is greater than the set reference threshold value, the corresponding component is an abnormal power component, when the component power quality deviation value is equal to the set reference threshold value, the corresponding component is a standard power component, and when the component power quality deviation value is less than the set reference threshold value, the corresponding component is a good power component. The number of abnormal power components, standard power components and good power components in each equipment of the production line is obtained, and the proportion of abnormal power components, standard power components and good power components in each equipment of the production line is counted, and the component power quality deviation values ​​of the corresponding components of each equipment are summed to obtain the total component power quality deviation value Ypz of each equipment, and the component deviation value Syz of each equipment is calculated.

7. The power demand side power quality integrated service system according to claim 6, characterized in that: The steps for analyzing the acoustic characteristic value, dielectric wave loss value, physical and chemical variation value and telecommunication characteristic detuning value of the component are as follows: The acoustic characteristic of a component refers to the acquisition of the sound signal of the component by an acoustic sensor, and the conversion into a frequency domain signal by fast Fourier transform, and the acquisition of the amplitude change rate and the frequency bandwidth change rate in the frequency domain signal to obtain the acoustic characteristic value of the component by summing them up; the physicochemical parameter of the component refers to the sum of the cyclic voltammetric value of the component and the physical parameter change value of the component to obtain the physical and chemical change value of the component, and the physical parameter change value of the component refers to the sum of the maximum vibration acceleration, pressure fluctuation amplitude and maximum strain value of the component; the dielectric characteristic of the component refers to the sum of the dielectric constant change rate, dielectric loss factor and filter frequency offset of the component to obtain the dielectric wave loss value of the component; the electrical signal characteristics of the component It means acquiring the transient characteristics, pulse width, rising edge time and falling edge time in the time domain by collecting the voltage electrical signal of the component, adding the transient characteristics and pulse width and dividing by the sum of the rising edge time and the falling edge time to obtain the electrical time drop value of the component, converting the time domain signal into the frequency domain signal by Fourier series, obtaining the corresponding amplitude when the frequency is greater than n times the set frequency, calculating the sum of the amplitudes, marking it as the harmonic content value, where n is a positive integer greater than or equal to 2, performing weighted calculation on the electrical time drop value of the component and the harmonic content value, and multiplying them by the corresponding proportional factor coefficient to obtain the electrical characteristic drop harmonic value of the component; The analysis steps of the component base electrical distortion loss value and component particle dynamic dispersion value are as follows: Basic electrical monitoring of components refers to component power consumption, power factor, voltage total harmonic distortion rate, and transient voltage. The power consumption, voltage total harmonic distortion rate, and transient voltage of the component are summed and divided by the power factor to obtain the basic electrical distortion value of the component. The movement of component particles refers to applying a magnetic field perpendicular to the current direction of the component, measuring the Hall voltage, current, and magnetic field strength, obtaining the thickness hd of the component, analyzing and obtaining the Hall coefficient Hx, obtaining the electron charge dh, calculating the electron concentration dn, obtaining the resistivity dc, and calculating the carrier mobility qy. According to the formula, the carrier diffusion coefficient Kx is obtained. In the component, the spectrum of the emitted light is measured, and the wavelength distribution of the light is obtained using a spectrometer. The inverse of the obtained light wavelength is calculated and multiplied by the correction factor coefficient to obtain the quantum energy level dispersion degree Ls. The carrier mobility qy, the carrier diffusion coefficient Kx, and the quantum energy level dispersion degree Ls are calculated to obtain the component particle dispersion value Sl.

8. The power demand side power quality integrated service system according to claim 2, characterized in that: The steps for analyzing the key values ​​of the electrical quality of each device are as follows: Mark each device in the production line as a network node to form a production line network, obtain each connection path in the production line network, and obtain the shortest path of all node pairs, count the frequency value of each device appearing in all shortest paths, mark it as the intermediate frequency value of each device, obtain the number of devices in the production line network, and calculate the intermediate distance value of each device; Construct the adjacency matrix of the production line equipment node network, obtain the number of direct connections between each device and all devices in the adjacency matrix of the node network, mark it as the connection center value of each device, and weight the intermediate frequency value, connection distance value and connection center value of each device, and multiply them by the corresponding correction factor coefficient to obtain the key value SDz of the electrical quality of each device in the production line.

9. The power demand side power quality integrated service system according to claim 1, characterized in that: The feasibility of adjusting the production line operation time is determined and analyzed as follows: The total number of workers ZR and wages DY of the production line are obtained, the average wage subsidy coefficient r1 after adjusting the working time, the night working efficiency reduction value r2, the per capita value of night meal subsidy Cb, the peak electricity price Gd, the off-peak electricity price Dd, the operating time YT and the production line equipment power Sg are normalized with the comprehensive power quality heterogeneity key value SYJ of each production line, and the feasible value KZZ of each production line scheduling is obtained according to the formula. When the feasible value of each production line scheduling is greater than or equal to the set threshold, it is determined that the production line can adjust the working time.

10. A comprehensive service method for power quality on the power demand side, characterized in that A power demand side power quality integrated service system applied to any one of claims 1 to 9, comprising the following steps: Step 1: Determine and analyze the equipment connection status of the production line to obtain the key value of the electrical quality of each device; Step 2: Evaluate the basic electrical monitoring of the equipment's components, component particle movement, component acoustic characteristics, component physicochemical parameters, component dielectric characteristics, and component electrical signal characteristics to obtain the component electrical quality deviation value, and compare and analyze it with the set reference threshold to obtain the component deviation value of each device; Step 3: Analyze and judge the three-phase voltage, voltage signal, radiation immunity and harmonic interaction between devices to obtain the harmonic interference flash value of the equipment; Step 4: Analyze the average power quality of the entire production line equipment and carry out corresponding early warning processing for the production line; Step 5: Determine the feasibility of adjusting the production line operation time.

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