Method and system for SVG comprehensive output and storage medium thereof

Abstract

The invention discloses a method and system for SVG comprehensive output and a storage medium thereof, and relates to the technical field of electrical control, and the method comprises the steps: setting a load output function mode and a comprehensive compensation function mode through an external human-computer interface, and carrying out the calculation according to the corresponding function mode detected through scanning and the adjustable variable of the corresponding external input, according to the method, the SVG has the dual characteristics of a simulation load source and a compensation source at the same time, so that the problems that the simulation load tested in production and application is flexible, controllable and adjustable, the stability of the simulation load is improved, and the stability of the simulation load is improved are solved. According to the method, compensation targets in field application are diversified, controllable and adjustable, program framework unification and human-computer interaction flexible setting are achieved, SVG output characteristics are adjusted, the characteristics can be simulated load characteristics used for testing, and the characteristics can also be actual compensation characteristics used for final application.

Description

Technical Field

[0001] The present invention relates to the field of electrical control technology, and in particular to a method, system and storage medium for SVG comprehensive output. Background Art

[0002] SVG is a dynamic reactive power compensation device used in power systems. It is mainly used to improve the voltage stability, power factor correction and power quality of the power grid. SVG can quickly respond to changes in power system demand, provide or absorb reactive power to maintain the grid voltage within the set range; Today, based on the gradual development of power electronics and automatic control, SVG with functions of reactive power compensation, harmonic control and grid voltage stabilization has gradually become the mainstream. Traditional SVG has the problems of single equipment function and difficulty in adjusting output characteristics according to actual conditions in actual production and application. Summary of the invention

[0003] The purpose of the present invention is to provide a method, system and storage medium for comprehensive SVG output, so that SVG has the dual characteristics of simulated load source and compensation source at the same time, solves the problem that the simulated load tested in production and application is flexible, controllable and adjustable, and also solves the problem that the compensation target in field application is diverse, controllable and adjustable, and achieves unified program framework and flexible setting of human-computer interaction to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a method for comprehensive SVG output, comprising the following steps: Step 1: Function mode setting: set the corresponding function mode on the external human-machine interface, including the load output function mode and the comprehensive compensation function mode, and set the adjustable variables of the corresponding function mode; Step 2: Data collection, detection of system current and voltage, SVG device output current and current human-machine interface input parameters; Step 3: Mode output, scan the corresponding functional mode, and cut off the reference output operation of the remaining functional modes: If it is the load output function mode, the adjustable variable corresponding to the load output function mode input by the external human-machine interface is calculated to obtain the required reference current data, which is then added to the subsequent current loop to perform closed-loop control calculations and output the corresponding load current containing the required load characteristics: If it is the comprehensive compensation function mode, the corresponding power quality parameters of the current system are obtained by calculating the detected system current and voltage, and then the reference compensation data that meets the requirements is obtained by calculating the adjustable variables corresponding to the comprehensive compensation function mode set by the current human-machine interface, and a current closed-loop operation is performed with the output current of the SVG device, and finally the corresponding compensation current containing the required compensation characteristics is output.

[0005] Preferably, the adjustable variables corresponding to the load output function mode include rise time Tup, upper limit duration Tuh, fall time Tdn, lower limit duration Tdh, upper limit current Iup, lower limit current Idn, harmonic current Ix0, and the reference current data includes reference reactive current, reference harmonic current and reference time curve St.

[0006] Preferably, the reference time curve St is divided into a rising section, an upper limit maintenance section, a falling section, and a lower limit maintenance section according to the rising time Tup, the upper limit duration Tuh, the falling time Tdn, and the lower limit duration Tdh. The specific method is: first calculate the current increase or decrease step amount Isetp corresponding to the rising section and the falling section according to the set upper limit current Iup, the lower limit current Idn, the rising time Tup, and the falling time Tdn, and then output the current in stages according to the rising time Tup, the upper limit duration Tuh, the falling time Tdn, and the lower limit duration Tdh.

[0007] Preferably, the comprehensive compensation function mode includes a power factor comprehensive compensation function mode and a voltage comprehensive compensation function mode, and the reference compensation data includes a reference reactive compensation amount Iq0 and a reference harmonic compensation amount Ix0.

[0008] Preferably, the power quality parameters corresponding to the power factor comprehensive compensation function mode include active current Ips, reactive current Iqs and harmonic current Ixs, and the adjustable variables corresponding to the power factor comprehensive compensation function mode include target power factor PF, harmonic compensation control word Eix and reactive compensation control word Ei0.

[0009] Preferably, the power quality parameters corresponding to the voltage comprehensive compensation function mode include the fundamental voltage Us0 and the harmonic current Ixs, and the adjustable variables corresponding to the voltage comprehensive compensation function mode include the target compensation voltage Ust and the harmonic compensation control word Eix.

[0010] Preferably, the adjustable variables corresponding to the functional mode are set with range limitation and error correction design, including the adjustable variables corresponding to the load output functional mode, the target power factor PF and the target compensation voltage Ust are all set with range limitation and automatically limited to the rated value.

[0011] Preferably, both the upper limit current Iup and the lower limit current Idn have error correction designs, and the error correction designs include upper and lower limit reversal error correction and transmission check error correction.

[0012] In order to solve the above technical problems, the present invention further provides a system for SVG comprehensive output, comprising: Memory for storing computer programs; A processor is used to execute the computer program, and when the computer program is executed by the processor, the method steps for comprehensive SVG output as described in any one of the above items are implemented.

[0013] In order to solve the above technical problem, the present invention further provides a readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the method steps for comprehensive SVG output as described in any one of the above items are implemented.

[0014] In summary, the beneficial effects of the present invention are: The present invention enables SVG to have the dual characteristics of a simulated load source and a compensation source, thereby solving the problem that simulated loads tested in production and applications are flexible, controllable and adjustable, and that compensation targets in field applications are diverse, controllable and adjustable. The invention automatically outputs reactive power and harmonics required for compensation according to actual field conditions, unifies the program framework, and flexibly sets human-computer interaction. According to the external human-computer interface and functional requirements, the output characteristics of SVG are adjusted, which can be either simulated load characteristics for testing or actual compensation characteristics for final applications.

[0015] The present invention also provides a system and storage medium for SVG comprehensive output, which have the above-mentioned beneficial effects and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic diagram of the process framework structure of a method for comprehensive SVG output according to the present invention; Figure 2 A schematic diagram of the process framework structure of a method for comprehensive SVG output according to the present invention; Figure 3 A schematic diagram of the process framework structure of a method for comprehensive SVG output according to the present invention; Figure 4 A schematic diagram of a human-machine interface for setting control parameters of a method for comprehensive SVG output according to the present invention; Figure 5 A schematic diagram of a human-machine interface for setting a load mode of a method for comprehensive SVG output according to the present invention; Figure 6 A schematic diagram of a human-machine interface for setting control parameters of a method for comprehensive SVG output according to the present invention; Figure 7 A schematic diagram of a human-machine interface for setting control parameters of a method for comprehensive SVG output according to the present invention; Figure 8 A schematic diagram of a human-machine interface for setting harmonic enabling parameters of a method for comprehensive SVG output according to the present invention; Fig. 9 The present invention is a schematic diagram of a human-machine interface for testing control settings of a method for comprehensive SVG output. DETAILED DESCRIPTION

[0018] The present invention will now be further described in detail in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic way, and therefore they only show the structures related to the present invention.

[0019] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0020] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0021] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0022] In the present invention, unless otherwise clearly defined and specified, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of at least two elements or the interaction relationship between at least two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Combine the following Figure 1 —9 The present invention is explained in detail. An embodiment of the present invention is: a method for comprehensive output of SVG, which is used for open-loop simulated load characteristic output in (production or field application) testing (load characteristics such as output reactive current, harmonic current, harmonic components, time length, and change process can be set), and is also used for the final actual comprehensive compensation characteristic output of the product (automatically outputting the reactive power and harmonics required for compensation according to the actual field conditions), and unifying the program framework and making it easy to operate based on the human-machine interface management.

[0024] The specific steps include: Step 1: Function mode setting refer to Figure 4-Figure 9 First, set the three functional modes Cmode of load characteristic output, power factor comprehensive compensation, and voltage comprehensive compensation in the external human-machine interface, and set the corresponding adjustable variables for each function respectively: The load characteristic output can be set to the following variables: rise time Tup, upper limit duration Tuh, fall time Tdn, lower limit duration Tdh, upper limit current Iup, lower limit current Idn, harmonic current Ix0, The variables that can be set for power factor comprehensive compensation include: target power factor PF, harmonic compensation control word Eix, reactive power compensation control word Ei0, The variables that can be set for voltage comprehensive compensation include: target compensation voltage Ust, harmonic compensation control word Eix; The input parameter settings of the human-machine interface are limited and error-corrected. Externally settable parameters including Tup, Tuh, Tdn, Tdh, Iup, Idn, Ix0, PF, and Ust all have setting range limitations (and are automatically limited to the rated values). Externally settable parameters including Iup and Idn all have error correction designs (to prevent upper and lower limit reversal error correction, and transmission verification error correction).

[0025] Step 2: Data Collection Detect the output currents ica, icb, icc of the SVG device; Detect system current isa, isb, isc; The current can be measured by installing a high-precision current transformer; Detect system voltages vsa, vsb, vsc; voltage transformers can be used for measurement; Scan the current human-machine interface input parameters Cmode, Tup, Tuh, Tdn, Tdh, Iup, Idn, Ix0, PF, Eix, Ei0, and Ust.

[0026] Step 3: Mode output, according to the scanned function mode, determine whether the current function mode is load characteristic output, power factor comprehensive compensation, or voltage comprehensive compensation; When the load characteristic output function mode is in this mode, the SVG no longer relies on the internal power factor comprehensive compensation and voltage comprehensive compensation algorithms, but generates the required reference current according to the adjustable variables input by the external human-machine interface (HMI), including the reference reactive current (Io) and the reference harmonic current (Ix), and controls it according to the set time curve (St). The entire control output process is as follows: First, the reference output operation of the remaining function modes is terminated, and the load characteristic output adjustable variables (rise time Tup, upper limit duration Tuh, fall time Tdn, lower limit duration Tdh, upper limit current Iup, lower limit current Idn, harmonic current Ix0) input by the external human-machine interface are calculated to obtain the required reference reactive current Io, reference harmonic current Ix, and reference time curve St to enter the subsequent current loop (ica, icb, icc need to be added) closed-loop control operation, and output the corresponding load current Iload (including the required load characteristics: reactive current size, harmonic current size, harmonic current component, current change process and time, etc.).

[0027] Specifically, the specific process of the above steps is as follows: 1. Using the load characteristic output adjustable variables (rise time Tup, upper limit duration Tuh, fall time Tdn, lower limit duration Tdh, upper limit current Iup, lower limit current Idn, harmonic current Ix0) input by the external human-machine interface, we can generate a reference time curve (St), which describes the current change that the SVG should output in different time periods. The reference time curve (St) is divided into the rise section, upper limit maintenance section, fall section, and lower limit maintenance section according to the rise time Tup, upper limit duration Tuh, fall time Tdn, and lower limit duration Tdh. First, the current increase and decrease step Isetp corresponding to the rise section and the fall section is calculated according to the set Iup, Idn, Tup, and Tdn, and then the current is output in stages according to the time Tup, Tuh, Tdn, and Tdh; 2. Based on the time curve (St), we can calculate the reference reactive current (Io) and reference harmonic current (Ix) at each moment; 3. Compare the calculated reference current with the actual measured SVG output current (ica, icb, icc), adjust the SVG output through the PID controller to make the actual current as close to the reference current as possible, and generate a PWM signal to drive the SVG power module according to the result of closed-loop control, and finally output the load current (Iload).

[0028] To this end, the present invention also provides a specific operation example as follows: Assumptions Cmode = 'LoadCharacteristic' (indicates that it is currently in load characteristic output mode); Io (reference reactive current) = 100A; Ix (reference harmonic current) = 20A; St (reference time curve) = 0.5s (this usually means that the target current is reached within 0.5 seconds); Example Calculation Check Cmode: In this case, Cmode is 'LoadCharacteristic', so the program will continue to execute.

[0029] Read the setting value: io = 100A (reference reactive current); ix = 20A (reference harmonic current); st = 0.5s (reference time curve); Calculating the reference current: Assume that the SVG controller has a simple algorithm that directly uses io as the reference reactive current and takes ix into account to adjust the total reference current. In this case, we may have: io + ix = 100A + 20A = 120A.

[0030] Read the actual output current: Assume that the actual current read from the DAU is: ica = 95A (phase A current); icb = 98A (phase B current); icc = 97A (C phase current); Implementing current loop control: It is assumed here that the SVG controller uses a proportional-integral (PI) controller to reduce the error. For simplicity, we can assume that the PI controller can eliminate the error immediately, which means that the new output current should be equal to the reference current.

[0031] Output load current: Based on the above assumptions, the SVG controller will adjust its output so that the output load current is close to the reference current. Since this is a three-phase system, the output current of each phase should be adjusted to about 120A (considering the balance of the three-phase system, the currents of the three phases should actually be the same, or in some cases, they can be different depending on the specific conditions of the grid).

[0032] Output If all conditions are met and the control system works properly, the final output load current should be: Phase A current (Ica_out) ≈ 120A; Phase B current (Icb_out) ≈ 120A; Phase C current (Icc_out) ≈ 120A.

[0033] When in power factor comprehensive compensation function mode: Cut off the reference output operation of the remaining functional modes; The active current Ips, reactive current Iqs and harmonic current Ixs of the current system are calculated from the detected system currents isa, isb, isc and system voltages vsa, vsb, vsc, and then the reference reactive compensation amount Iq0 and reference harmonic compensation amount Ix0 that meet the requirements are calculated from the target power factor PF, harmonic compensation control word Eix and reactive compensation control word Ei0 set by the current human-machine interface, and a current closed-loop operation is performed with the device output currents ica, icb and icc, and finally the corresponding compensation current Iout (including the required compensation characteristics: reactive current size, harmonic current size, harmonic current component, current change process and time, etc.) is output.

[0034] Specifically, the specific process of the above steps is as follows: Calculate active current Ips, reactive current Iqs, and harmonic current Ixs; The active current Ips and reactive current Iqs are calculated using the instantaneous power theory (IPT) or Park transform method. The harmonic current Ixs is simply assumed to be the total current minus the fundamental current. In practical applications, Fourier transform or other harmonic analysis methods can be used to more accurately extract the harmonic components. Calculate the reference reactive compensation amount Iq0 and the reference harmonic compensation amount Ix0; According to the target power factor PF, the harmonic compensation control word Eix and the reactive compensation control word Ei0, the required reference reactive compensation amount Iq0 and the reference harmonic compensation amount Ix0 are calculated.

[0035] If the user enables reactive power compensation, first calculate the required reference reactive current Iqs_target based on the target power factor PF and the current active current Ips: Iqs_target=Ips*tan(cos -1 (PF) Then, the reference reactive compensation amount Iq0 is: Iqs_target-Iqs; If the user does not enable reactive power compensation, it is 0; Whether to perform harmonic compensation depends on whether the user has enabled harmonic compensation. If harmonic compensation is enabled, the reference harmonic compensation amount Ix0 is a negative harmonic current, that is, the SVG outputs a current opposite to the harmonic current to offset the harmonics; otherwise, it is also 0.

[0036] Current closed loop control The system current and voltage are read according to the sampling period, the active, reactive and harmonic currents are calculated, and then the reference compensation amount is calculated according to the target parameters set by the HMI.

[0037] Two PID controllers are used to perform closed-loop control on reactive power compensation and harmonic compensation respectively, ensuring that the output current of the SVG is as close to the reference value as possible.

[0038] Finally, SVG outputs the compensation current Iout according to the control signal.

[0039] When in voltage comprehensive compensation function mode: Cut off the reference output operation of the remaining functional modes; The fundamental voltage Us0 and harmonic current Ixs of the current system are calculated from the detected system currents isa, isb, isc and the system voltages vsa, vsb, vsc. The reference reactive compensation amount Iq0 and reference harmonic compensation amount Ix0 that meet the requirements are calculated from the target compensation voltage Ust and harmonic compensation control word Eix set by the current human-machine interface, and a current closed-loop operation is performed with the device output currents ica, icb, icc, and finally the corresponding compensation current Iout (including the required compensation characteristics: reactive current size, harmonic current size, harmonic current component, current change process and time, etc.) is output.

[0040] Specifically, the specific process of the above steps is as follows: Calculate the fundamental voltage Us0 and harmonic current Ixs; Use Fast Fourier Transform (FFT) to extract the fundamental component and total harmonic components from the input signal voltage or current. Generally, the sampling frequency should be at least twice the highest frequency of the signal. The fundamental component is extracted from the system voltages vsa, vsb, and vsc using FFT, which first calculates the fundamental index, then extracts the spectrum component at the index, and calculates its effective value.

[0041] For a three-phase system, perform FFT analysis on the voltage of each phase, and finally take the average value as the fundamental voltage Us0 of the system; FFT is used to extract harmonic components from system currents isa, isb, and isc. It first calculates the fundamental index, then extracts all harmonic components except the DC component and the fundamental component, and calculates the sum of their effective values.

[0042] For a three-phase system, perform FFT analysis on the current of each phase, and finally take the average value as the harmonic current Ixs of the system; Calculate the reference reactive compensation amount Iq0 and the reference harmonic compensation amount Ix0; According to the target compensation voltage Ust and the harmonic compensation control word Eix, the required reference reactive compensation amount Iq0 and the reference harmonic compensation amount Ix0 are calculated; The calculation of the reference reactive compensation amount Iq0 is based on the difference between the target compensation voltage Ust and the current fundamental voltage Us0. We can calculate the reactive compensation amount by the following formula: Iq0=(Ust-Us0) / XL The inductive reactance of the XL system can usually be approximated as: XL=2πfL, where f is the frequency of the system (50Hz or 60Hz) and L is the inductance of the system. In practical applications, XL can be obtained through experiments or system parameter estimation.

[0043] If the user does not enable reactive power compensation, it is 0.

[0044] The calculation of the reference harmonic compensation amount Ix0 is based on whether the user has enabled harmonic compensation Eix. If harmonic compensation is enabled, the reference harmonic compensation amount is the negative harmonic current, that is, the SVG outputs a current opposite to the harmonic current to offset the harmonics, otherwise it is 0.

[0045] To this end, the present invention also provides a specific operation example, as follows: Assumed value Sampling period: 0.01 seconds (10 milliseconds); Number of sampling points per cycle: 100; System current and voltage: isa = np.linspace(0.5, 1.2, num_samples); isb = np.linspace(0.4, 1.1, num_samples); isc = np.linspace(0.3, 1.0, num_samples); vsa = np.linspace(220, 230, num_samples); vsb = np.linspace(219, 229, num_samples); vsc = np.linspace(218, 228, num_samples); All are assumed to be sine waves with 100 points; Control parameters input by HMI: ust = 225 (target compensation voltage, unit: volt); eix = True (enable harmonic compensation); Fundamental voltage extraction: Through FFT analysis, the fundamental components are extracted from the three-phase voltage signal. Assume that the extracted results are Us0_a = 226.00 V, Us0_b = 225.00 V, and Us0_c = 224.00 V.

[0046] Calculate the average fundamental voltage Us0 = (226.00 + 225.00 + 224.00) / 3 = 225.00 V.

[0047] Harmonic current extraction: Through FFT analysis, the harmonic components are extracted from the three-phase current signal. Assume that the extracted results are Ixs_a = 0.00 A, Ixs_b = 0.00 A, and Ixs_c = 0.00 A.

[0048] Calculate the harmonic current Ixs = (0.00 + 0.00 + 0.00) / 3 = 0.00 A.

[0049] Calculate the compensation amount: According to the target compensation voltage ust = 225 V and the current fundamental voltage Us0 = 225.00 V, the required reactive compensation amount Iq0 = (225 - 225.00) / (sqrt(3) * 0.5) = -1.73 A is calculated.

[0050] Since the harmonic current Ixs = 0.00 A and harmonic compensation is enabled eix = True, the calculated harmonic compensation amount Ix0 = -0.00 A.

[0051] A PID controller is used to update the control signal according to the calculated reference compensation amount. For reactive power compensation, Iq0 = -1.73 A is directly used as a reference; for harmonic compensation, Ixs = 0.00 A is used as feedback.

[0052] Output compensation current: The final output compensation current is Iq = -1.73 A and Ix = 0.00 A.

[0053] The above describes in detail an embodiment corresponding to a method for comprehensive SVG output. On this basis, the present invention also discloses a system and storage medium for comprehensive SVG output corresponding to the above method.

[0054] A system for comprehensive SVG output, comprising: Memory for storing computer programs; The processor is used to execute the computer program, and when the computer program is executed by the processor, it can implement the relevant steps of a method for comprehensive SVG output disclosed in any of the aforementioned embodiments.

[0055] The processor may include one or more processing cores, such as a core processor, a core processor, etc. The processor may be implemented in at least one of the following hardware forms: a digital signal processor (DSP), a field programmable gate array (FPGA), and a programmable logic array (PLA). The processor may also include a main processor and a coprocessor. The main processor is a processor for processing data in the wake-up state, also known as a central processing unit (CPU); the coprocessor is a low-power processor for processing data in the standby state.

[0056] In some embodiments, the processor may be integrated with a graphics processing unit (GPU), which is responsible for rendering and drawing the content to be displayed on the display screen. In some embodiments, the processor may also include an artificial intelligence (AI) processor, which is used to process computing operations related to machine learning.

[0057] The memory may include one or more readable storage media, which may be non-transitory. The memory may also include high-speed random access memory, and non-volatile memory, such as one or more disk storage devices, flash memory storage devices. In this embodiment, the memory is at least used to store the following computer program, wherein, after the computer program is loaded and executed by the processor, it can implement the relevant steps in a method for comprehensive SVG output disclosed in any of the aforementioned embodiments. In addition, the resources stored in the memory may also include an operating system and data, etc., and the storage method may be temporary storage or permanent storage. Among them, the operating system may be Windows. The data may include, but is not limited to, the data involved in the above method.

[0058] In addition, each functional module in each embodiment of the present invention may be integrated into a processing module, or each module may exist physically separately, or two or more modules may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may be stored in a readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or all or part of the technical solution, can be embodied in the form of a software product, and the computer software product is stored in a storage medium to execute all or part of the steps of the method described in each embodiment of the present invention.

[0059] To this end, an embodiment of the present invention further provides a readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of a method for comprehensive SVG output are implemented.

[0060] The readable storage medium may include: a USB flash drive, a mobile hard disk, a read-only memory ROM (Read-Only Memory), a random access memory RAM (Random Access Memory), a magnetic disk or an optical disk, and other media that can store program codes.

[0061] The computer program contained in the readable storage medium provided in this embodiment can implement the steps of the method for comprehensive SVG output as described above when executed by a processor, and the effect is the same as above.

[0062] The above is a detailed introduction to a method, system and storage medium for comprehensive SVG output provided by the present invention. The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the embodiments can be referenced to each other. For the devices, equipment and readable storage media disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0063] The above is only a specific implementation of the invention, but the protection scope of the invention is not limited to it. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the invention. Therefore, the protection scope of the invention should be based on the protection scope defined in the claims.

Claims

1. A method for comprehensive SVG output, characterized in that: The following steps are involved: Step 1: Function mode setting: set the corresponding function mode on the external human-machine interface, including the load output function mode and the comprehensive compensation function mode, and set the adjustable variables of the corresponding function mode; Step 2: Data collection, detection of system current and voltage, SVG device output current and current human-machine interface input parameters; Step 3: Mode output, scan the corresponding functional mode, and cut off the reference output operation of the remaining functional modes: If it is the load output function mode, the adjustable variable corresponding to the load output function mode input by the external human-machine interface is calculated to obtain the required reference current data, which is then added to the subsequent current loop to perform closed-loop control calculations and output the corresponding load current containing the required load characteristics: If it is the comprehensive compensation function mode, the corresponding power quality parameters of the current system are obtained by calculating the detected system current and voltage, and then the reference compensation data that meets the requirements is obtained by calculating the adjustable variables corresponding to the comprehensive compensation function mode set by the current human-machine interface, and a current closed-loop operation is performed with the output current of the SVG device, and finally the corresponding compensation current containing the required compensation characteristics is output.

2. The method for comprehensive SVG output according to claim 1, characterized in that: The adjustable variables corresponding to the load output function mode include rise time, upper limit duration, fall time, lower limit duration, upper limit current, lower limit current, and harmonic current. The reference current data includes reference reactive current, reference harmonic current and reference time curves.

3. The method for SVG comprehensive output according to claim 2, characterized in that: The reference time curve is divided into a rising section, an upper limit holding section, a falling section, and a lower limit holding section according to the rising time, the upper limit duration, the falling time, and the lower limit duration. The specific method is: firstly, the current increase or decrease step amount corresponding to the rising section and the falling section is calculated according to the set upper limit current, lower limit current, rising time, and falling time, and then the current is output in stages according to the rising time, the upper limit duration, the falling time, and the lower limit duration.

4. The method for comprehensive SVG output according to claim 3, characterized in that: The comprehensive compensation function mode includes a power factor comprehensive compensation function mode and a voltage comprehensive compensation function mode, and the reference compensation data includes a reference reactive power compensation amount and a reference harmonic compensation amount.

5. The method for comprehensive SVG output according to claim 4, characterized in that: The power quality parameters corresponding to the power factor comprehensive compensation function mode include active current, reactive current and harmonic current, and the adjustable variables corresponding to the power factor comprehensive compensation function mode include target power factor, harmonic compensation control word and reactive compensation control word.

6. The method for comprehensive SVG output according to claim 5, characterized in that: The power quality parameters corresponding to the voltage comprehensive compensation function mode include fundamental voltage and harmonic current, and the adjustable variables corresponding to the voltage comprehensive compensation function mode include target compensation voltage and harmonic compensation control word.

7. The method for comprehensive SVG output according to claim 6, characterized in that: The adjustable variables corresponding to the functional mode are set with range limitations and error correction designs, including the adjustable variables corresponding to the load output functional mode, the target power factor and the target compensation voltage are all set with range limitations and automatically limited to the rated values, including the upper and lower current limits. There are error correction designs, including upper and lower limit reversal correction and transmission verification correction.

8. The method for comprehensive SVG output according to claim 7, characterized in that: Both the upper limit current and the lower limit current have error correction designs, and the error correction designs include upper and lower limit reversal error correction and transmission check error correction.

9. A control system for SVG comprehensive characteristic output, characterized in that: include Memory for storing computer programs; A processor is used to execute the computer program, and when the computer program is executed by the processor, the method steps for SVG comprehensive output as described in any one of claims 1 to 8 are implemented.

10. A readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the method steps for SVG comprehensive output as described in any one of claims 1 to 8 are implemented.

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