Additional control method and system to enhance the rapidity of the transient voltage response

Abstract

The application discloses an additional control method and system for enhancing transient voltage response rapidity, and belongs to the technical field of reactive voltage control of power systems. The method comprises the following steps: acquiring a voltage operation state of a control point, and judging whether the control point is in a non-safety operation interval according to a preset voltage operation interval; if yes, calculating a voltage effective value based on three-phase voltage instantaneous values of the control point; calculating a change rate of the voltage amplitude according to the voltage effective value calculated quickly, and superimposing the change rate as a feedback quantity to a voltage control link. The application can quickly respond to voltage changes when a large disturbance occurs in the system by introducing voltage change rate feedback, significantly improves the dynamic support capability of power electronic equipment in the transient process, meanwhile, does not affect the original control logic under steady state or small disturbance, and balances the rapidity and stability of the control, effectively inhibits the voltage collapse risk, and is suitable for fast voltage control of STATCOM, SVG and other reactive compensation devices.

Description

Technical Field

[0001] This application relates to the field of reactive voltage control technology in power systems, specifically to an additional control method and system for enhancing the rapid response of transient voltage. Background Technology

[0002] Traditional power systems operate relatively stably, with power generation, transmission, and consumption concentrated in both time and space. Reactive power balancing primarily relies on synchronous generators and switched capacitors / reactors. These devices have a relatively slow response time (ranging from hundreds of milliseconds to minutes), enabling them to handle slow changes in daily load.

[0003] However, the structure of modern power systems has undergone fundamental changes, creating an urgent need for rapid control of reactive power and voltage. This is mainly due to the high proportion of renewable energy integration that is random and rapidly changing, the frequent start-stop of loads such as electric arc furnaces and electric vehicles, and the power system pattern of long-distance power transmission.

[0004] Modern power grids are evolving into "electronic power grids," characterized by reduced inertia and accelerated dynamic processes. The propagation and impact speed of disturbances in the system far exceeds that of traditional power grids. Therefore, the speed of reactive power voltage compensation by power electronic equipment is crucial for ensuring the safe, stable, and high-quality operation of modern power grids. Voltage stability is one of the three pillars of power system stability. When a large disturbance occurs in the system, the voltage drops rapidly. If reactive power compensation cannot be injected quickly to support the voltage, it may cause loads such as asynchronous motors in the system to stall, absorbing more reactive power, creating a vicious cycle, and ultimately leading to a voltage avalanche, or "voltage collapse," causing widespread blackouts. Fast reactive power compensation devices such as STATCOM are commonly used, but due to the design of their control algorithms, they often struggle to function effectively in the early stages of voltage changes. In traditional power electronic equipment, the speed and stability of voltage control are mutually constrained; when voltage fluctuates significantly, it is difficult to respond to voltage changes quickly through closed-loop control, failing to provide timely support for the system voltage.

[0005] The existing technology has the following obvious drawbacks: First, the control mode is an open-loop structure rather than a voltage closed-loop. Constant current control directly issues current commands during transient periods. Although the response speed is fast, it does not form a closed-loop control circuit of "voltage detection - deviation calculation - output adjustment". It cannot dynamically adjust the output according to the actual voltage recovery, making it difficult to maximize the supporting capacity of power electronic equipment.

[0006] Second, linearization leads to insufficient reactive power support. The above formula is essentially a linearized approximation of the UI characteristic curve. When the voltage deviates significantly from the rated value, this linearization deviates significantly from the actual required reactive power support, resulting in insufficient or over-adjusted reactive power injection.

[0007] Third, there is a trade-off between response delay and stability. If voltage closed-loop control based on RMS value calculation is used, a dilemma arises: obtaining an accurate fundamental RMS voltage value typically requires a data window length of one cycle (20ms), which introduces unavoidable delay; shortening the data window length or using instantaneous value control can speed up the response, but it is easily affected by harmonics, transient components, and other disturbances, leading to instability or malfunctions in the control system. Existing technologies struggle to simultaneously achieve both rapid response and stable control.

[0008] Therefore, how to significantly improve the voltage response speed of power electronic devices during transient processes while ensuring steady-state control performance, so that they can quickly intervene and provide support in the early stages of voltage changes, has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0009] The purpose of this application is to provide an additional control method and system that enhances the speed of transient voltage response. Under steady state and small disturbances, it does not affect the original impedance characteristics of the equipment, but can quickly respond to voltage changes when the system experiences large disturbances. By introducing voltage change rate feedback, it improves the dynamic support capability of power electronic equipment for system voltage, thereby balancing control speed and stability.

[0010] To achieve the above objectives, the additional control method for enhancing the rapid response of transient voltage provided in this application specifically includes: determining whether the control point is in an unsafe operating range based on the voltage operating state of the control point and a preset voltage operating range; when the control point is in an unsafe operating range, calculating the effective voltage value of the control point based on the instantaneous three-phase voltage values ​​of the control point; calculating the rate of change of voltage amplitude based on the effective voltage value, and superimposing the rate of change as a feedback quantity onto the voltage control loop.

[0011] In the above-mentioned additional control method for enhancing the rapid response of transient voltage, optionally, determining whether the control point is in an unsafe operating range based on the voltage operating state of the control point and a preset voltage operating range includes: calculating the fundamental effective value of the voltage based on the instantaneous three-phase voltage values ​​of the control point; and comparing the fundamental effective value with the preset voltage operating range to determine whether the control point is in a safe operating range or an unsafe operating range.

[0012] In the above-mentioned additional control method to enhance the rapidity of transient voltage response, optionally, the calculation of the fundamental effective value of the voltage based on the instantaneous value of the three-phase voltage at the control point includes: extracting the fundamental component by performing a Fourier transform on the instantaneous value of the three-phase voltage; and calculating the effective value of the fundamental positive sequence voltage by positive and negative sequence decomposition.

[0013] In the above-mentioned additional control method for enhancing the rapid response of transient voltage, optionally, calculating the effective voltage value of the control point based on the instantaneous three-phase voltage values ​​of the control point includes: performing absolute value processing on the instantaneous three-phase voltage values ​​to obtain the absolute values ​​of the three-phase voltages; collecting data points within a preset calculation period for each phase voltage, and generating the effective voltage value at the current moment based on the maximum value among the absolute values ​​of the three-phase voltages.

[0014] In the above-mentioned additional control method to enhance the speed of transient voltage response, optionally, the calculation of the rate of change of voltage amplitude based on the effective voltage value includes: calculating the rate of change of voltage amplitude by means of the difference between the effective voltage values ​​obtained in two consecutive preset calculation cycles and the time difference.

[0015] In the above-mentioned additional control method to enhance the speed of transient voltage response, optionally, the rate of change is superimposed on the voltage control loop as a feedback quantity, which includes: adjusting the rate of change by a preset proportional coefficient and then superimposing it on the reactive current reference value.

[0016] This application also provides an additional control system to enhance the rapid response of transient voltage. The system includes a judgment module, a calculation module, and a control module. The judgment module is used to determine whether the control point is in an unsafe operating range based on the voltage operating state of the control point and a preset voltage operating range. The calculation module is used to calculate the effective voltage value of the control point based on the instantaneous three-phase voltage value of the control point when the control point is in an unsafe operating range. The control module is used to calculate the rate of change of voltage amplitude based on the effective voltage value and add the rate of change as a feedback quantity to the voltage control loop.

[0017] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described method.

[0018] This application also provides a computer-readable storage medium storing a computer program that performs the above-described methods.

[0019] This application also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of the above-described method.

[0020] The beneficial technical effects of this application are as follows: The root mean square (RMS) algorithm is used to determine the voltage operating range of the control point in real time. Only when the voltage exceeds the limit is a rapid effective value calculation based on instantaneous values ​​triggered. The voltage amplitude change rate is extracted using the differential method and then superimposed onto the voltage loop output via a proportional coefficient. This strategy significantly shortens the response delay of the reactive power compensation device during large voltage fluctuations, enhancing the voltage support capability during transient processes. Under steady-state or small disturbances, the original control logic remains unchanged, maintaining the system's stability and impedance characteristics. Compared with existing constant current ride-through control, it achieves a rapid response in the voltage closed loop, avoiding insufficient support capability caused by control mode switching, effectively suppressing the risk of voltage collapse, and improving the safe operation level of the power electronic grid. Attached Figure Description

[0021] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic flowchart of an additional control method for enhancing the speed of transient voltage response provided in an embodiment of this application; Figure 2 This is a schematic diagram of the non-safe operating range determination process provided in an embodiment of this application; Figure 3 This is a schematic diagram of the process for obtaining the fundamental effective value of voltage according to an embodiment of this application; Figure 4 This is a schematic diagram of the voltage RMS value calculation process provided in an embodiment of this application; Figure 5 This is a schematic diagram illustrating the basic control strategy principle of SVG provided in an embodiment of this application; Figure 6 This is a schematic diagram of the three-phase instantaneous values ​​of the control point voltage provided in an embodiment of this application; Figure 7 This is a schematic diagram of the instantaneous absolute value of the three-phase control point voltage provided in an embodiment of this application; Figure 8 A schematic diagram of the three-phase instantaneous absolute value logic of the control point voltage provided in an embodiment of this application; Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0022] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0023] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0024] In this document, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Furthermore, the term "at least one" in this document means any combination of at least two of any one or more elements. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0025] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed description. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0026] Please refer to Figure 1 As shown, the additional control method for enhancing the speed of transient voltage response provided in this application specifically includes: S101 determines whether the control point is in an unsafe operating range based on the voltage operating status of the control point and the preset voltage operating range; Specifically, power electronic devices (such as STATCOM, SVG, etc.) continuously monitor the voltage level at the connection point (i.e., control point) during normal operation. This step aims to identify whether a voltage disturbance requiring a rapid response has occurred in the system. To this end, a safe operating range is pre-defined, typically centered on the rated voltage and covering the permissible normal fluctuation range. For example, the safe operating range can be set to [0.9 pu, 1.1 pu]. When the voltage is within this range, the system is considered to be in a steady state or a state of minor disturbance; when the voltage exceeds this range, i.e., below the lower limit or above the upper limit, it is determined to have entered an unsafe operating range, indicating that a more serious voltage disturbance has occurred in the system, requiring the activation of additional control strategies to accelerate the response speed.

[0027] S102 When the control point is in an unsafe operating range, calculate the effective voltage value of the control point based on the instantaneous three-phase voltage value of the control point; After the system is determined to have entered an unsafe operating range, the conventional method for calculating the effective voltage value based on a complete power frequency cycle suffers from significant delays due to the long data window (typically 20ms), making it difficult to meet the requirements for rapid response. Therefore, this step employs a fast effective voltage value estimation method based on instantaneous values. This method does not wait for sampling data from a complete cycle but instead uses the instantaneous voltage values ​​of the current moment and several recent sampling points to quickly estimate the effective voltage value using a specific algorithm. Although the accuracy of this estimation is slightly lower than the calculated value for a complete cycle, its update rate is extremely high, reflecting the voltage change trend within milliseconds, laying the foundation for subsequent rapid control.

[0028] S103 calculates the rate of change of voltage amplitude based on the effective voltage value and adds the rate of change as a feedback quantity to the voltage control loop.

[0029] After obtaining a rapidly estimated voltage RMS value sequence, this step further calculates its rate of change. The voltage rate of change reflects the severity and trend of voltage fluctuations: the larger the rate of change, the faster the voltage drops or rises, and the more urgent the system's need for reactive power support. This application introduces this rate of change as an additional feedback quantity into the original voltage closed-loop control. Specifically, the rate of change is multiplied by a preset proportional coefficient and then superimposed on the reactive current reference value, enabling the reactive power compensation device to output reactive power in the early stages of voltage changes, or even before the voltage amplitude drops to a dangerous level, thus playing a role of "predictive support." This differential-first control strategy significantly improves the response speed of the equipment during transient processes without affecting the control characteristics in steady state.

[0030] Please refer to Figure 2 As shown, in one embodiment of this application, determining whether the control point is in an unsafe operating range based on the voltage operating state of the control point and a preset voltage operating range includes: S201 calculates the fundamental effective value of the voltage based on the instantaneous three-phase voltage values ​​at the control point; To accurately determine the voltage operating range and avoid misjudgments caused by interference factors such as harmonics and transient spikes, this embodiment prioritizes using the fundamental RMS value as the judgment criterion. The fundamental RMS value reflects the main energy components of the voltage, and its changes better represent the true operating state of the system. There are various methods for calculating the fundamental RMS value. For example, a Fast Fourier Transform (FFT) can be used to extract the 50Hz fundamental component from the instantaneous values ​​of the three-phase voltage, and then the RMS value of the fundamental positive-sequence voltage can be obtained through methods such as positive and negative sequence decomposition. This calculation typically uses a data window length of one complete power frequency cycle. Although there is an inherent delay, this delay is acceptable because the range judgment stage does not directly participate in transient control.

[0031] S202 compares the fundamental effective value with the preset voltage operating range to determine whether the control point is in a safe operating range or an unsafe operating range.

[0032] The fundamental RMS value calculated in step S201 is compared with the preset voltage operating range. The preset voltage operating range includes two parts: a safe operating range and an unsafe operating range. The safe operating range corresponds to the range of normal voltage fluctuations. Within this range, the additional control strategy of this application does not intervene, and the equipment maintains its original control mode to ensure the accuracy and stability of steady-state control. The unsafe operating range corresponds to the range where the voltage deviates significantly from the rated value, typically including low voltage ranges (e.g., below 0.9 pu) and high voltage ranges (e.g., above 1.1 pu). Once the fundamental RMS value falls into the unsafe operating range, the system determines that the subsequent rapid response process needs to be initiated.

[0033] Please refer to Figure 3 As shown, in one embodiment of this application, calculating the fundamental effective value of the voltage based on the instantaneous three-phase voltage values ​​of the control point includes: S301 performs Fourier transform on the instantaneous values ​​of the three-phase voltage to extract the fundamental component; The control system of power electronic equipment samples the three-phase voltage at the control point at a fixed sampling frequency to obtain a discrete instantaneous value sequence. , and .

[0034] By performing a Fourier transform (such as FFT or recursive DFT) on the discrete sequence of each phase voltage, the 50Hz fundamental component of that phase voltage can be extracted. The data window length for the Fourier transform is typically one power frequency cycle (e.g., 20ms) to ensure frequency resolution and computational accuracy. Through the Fourier transform, the amplitude and phase information of the fundamental component of each phase voltage can be obtained.

[0035] S302 calculates the effective value of the fundamental positive sequence voltage by decomposing the positive and negative sequences.

[0036] In actual power grids, voltage may contain negative-sequence and zero-sequence components, especially during asymmetrical faults. For power electronic devices connected in a three-phase three-wire system (such as STATCOM), the zero-sequence component is absent; however, the presence of the negative-sequence component affects the accurate assessment of voltage amplitude. To accurately reflect the system's voltage support requirements, positive-sequence voltage is preferentially used as the control basis. Based on the fundamental component of phase A extracted in step S301, the positive-sequence components of phases B and C can be calculated. According to the symmetrical component method, the amplitudes of the three-phase positive-sequence components are equal, and their phases differ by 120 degrees sequentially. Therefore, after knowing the amplitude and phase of the positive-sequence component of phase A, the positive-sequence components of phases B and C can be obtained. Furthermore, the effective value of the three-phase positive-sequence voltage can be calculated. This fundamental positive-sequence effective value is the basis for determining the voltage range.

[0037] Please refer to Figure 4 As shown, in one embodiment of this application, calculating the effective voltage value of the control point based on the instantaneous three-phase voltage value of the control point includes: S401 performs absolute value processing on the instantaneous values ​​of the three-phase voltages to obtain the absolute values ​​of the three-phase voltages; Upon determining that the system has entered an unsafe operating range, the control system immediately initiates rapid voltage RMS value calculation. First, the absolute values ​​of the real-time acquired three-phase voltage instantaneous values ​​are taken to obtain the absolute values ​​of the three-phase voltages. The purpose of taking the absolute values ​​is to flip the negative half-cycle of the sine wave to positive, facilitating continuous tracking of the voltage amplitude change trend within a cycle.

[0038] S402 collects data points within a preset calculation period for each phase voltage and generates the effective voltage value at the current moment based on the maximum value among the absolute values ​​of the three phase voltages.

[0039] This step employs a sliding window-based extreme value sampling method to quickly estimate the effective voltage value. The preset calculation period is set to one-sixth of the power frequency cycle (i.e., T / 6, approximately 3.33ms for a 50Hz system). Within each T / 6 time window, the absolute value sequence of each phase voltage is monitored, and the maximum absolute value of that phase voltage within that window is recorded. Simultaneously, the maximum values ​​of the three phases within that window are compared, and the maximum value among the three is taken as the estimated effective voltage value for the current moment. The reason for using a T / 6 window and taking the maximum value of the three phases is that at any given moment, at least one phase of a symmetrical three-phase sinusoidal voltage will have an instantaneous value close to its peak value, and there is a fixed 2:2 relationship between the peak value and the effective value. Using this method, the estimated effective voltage value can be updated every 3.33ms, which is several times faster than the traditional 20ms cycle calculation, enabling extremely rapid detection of initial voltage drops or rises.

[0040] Based on any of the above embodiments, this application also provides a specific implementation method for calculating the rate of change and superimposing feedback. Specifically, calculating the rate of change of voltage amplitude based on the effective voltage value may include: calculating the rate of change of voltage amplitude using a differential method based on the ratio of the difference between the effective voltage values ​​obtained in two consecutive preset calculation cycles to the time difference. Further, superimposing the rate of change as a feedback quantity onto the voltage control loop may include: superimposing the rate of change onto the reactive current reference value after adjusting it using a preset proportional coefficient.

[0041] To facilitate a clearer understanding of the additional control method for enhancing the rapid response of transient voltage provided in this application, the following description uses an implementation method from actual operation as an example to integrate and illustrate the above embodiments. Those skilled in the art will understand that this embodiment is merely for illustrative purposes and does not constitute any limitation thereof.

[0042] Overall, the specific implementation logic of the additional control method for enhancing transient voltage response speed provided in this application is as follows: This application adds rapid feedback to the voltage control loop. When voltage fluctuations are within the safe operating range, the additional control is inactive; however, when the voltage waveform is large, the additional control strategy is enabled. The voltage change rate calculated using the differential method is fed back to the voltage loop output, enhancing the response characteristics of the power electronic equipment under rapid voltage changes. Simultaneously, it does not affect the impedance characteristics of the equipment in steady state and under small disturbances, thus balancing the speed and stability of the equipment's response. Specifically: Step 1: Calculate the fundamental effective value of the control point voltage using the root mean square (RMS) algorithm, and determine the voltage operating range of the control point based on the pre-set voltage range. Step 2: If the control point voltage is in the unsafe operating range, the effective voltage value is calculated using a fast algorithm based on the instantaneous three-phase voltage values ​​at the control point. Step 3: Calculate the voltage amplitude change rate using the differential method and output the voltage loop through the KD feedback value.

[0043] The implementation logic for each step is as follows: Step 1: Typical control modes of power electronic equipment, such as Figure 5 As shown, a typical dual-loop control mode is adopted. The outer loop controls the DC and AC voltages to generate dq-axis current reference values. Based on the instantaneous values ​​of the three-phase voltages at the control point, the 50Hz three-phase sinusoidal voltage data is first extracted using Fast Fourier Transform (FFT). The commonly used data length for FFT is one period T, thus obtaining the instantaneous values ​​of the ABC three-phase voltages at the control point. , and .

[0044] Based on the 50Hz fundamental frequency data, the effective value of the fundamental positive sequence voltage is obtained through positive and negative sequence decomposition.

[0045] ; (1)

[0046] in, , , and These refer to the zero-sequence, positive-sequence, and negative-sequence values ​​of phase A voltage, respectively.

[0047] Then, based on the phase relationship of the three-phase voltages, the positive sequence voltage values ​​of phase B and phase C can be obtained. and That is, it is obtained from equations (2) and (3).

[0048] ; (2) ; (3) Calculate the fundamental positive sequence value according to equation (4): ; (4) Calculated Afterwards, if If so, it is determined that the power electronic equipment is in the safe voltage operating range. or Then it is determined that the power electronic equipment is in an unsafe voltage operating range.

[0049] Step Two: Please refer to Figure 6 and Figure 7 As shown, if the power electronic equipment is operating in an unsafe voltage range, a rapid calculation of instantaneous values ​​is triggered. Based on the instantaneous values ​​of the three-phase voltages, the instantaneous values ​​are first converted to absolute values, and then data for each phase at time T / 6 is collected. The maximum value among the three phases is taken as the effective value of the control point voltage.

[0050] Step 3: Based on the effective value of the control point voltage calculated quickly in step two, the rate of change of the effective value of the control point voltage is calculated using the differential method.

[0051] (5)

[0052] in, This refers to the effective value of the control point voltage calculated in the (N+1)th T / 6 cycle. This refers to the effective value of the control point voltage calculated in the Nth T / 6 cycle. This is the rate of change of the control point voltage.

[0053] like Figure 8 As shown, the calculated That is, the rate of change of the control point voltage is superimposed on the reactive current reference through the KD coefficient. When a large disturbance occurs in the system, this differential-first strategy improves the control response speed of the power electronic equipment.

[0054] This application also provides an additional control system to enhance the rapid response of transient voltage. The system includes a judgment module, a calculation module, and a control module. The judgment module determines whether the control point is in an unsafe operating range based on its voltage operating state and a preset voltage operating range. The calculation module calculates the effective voltage value of the control point based on the instantaneous three-phase voltage values ​​when the control point is in an unsafe operating range. The control module calculates the rate of change of the voltage amplitude based on the effective voltage value and adds this rate of change as a feedback quantity to the voltage control loop. Since the implementation logic and principles of each component have been illustrated in the foregoing embodiments, they will not be described in detail here.

[0055] The beneficial technical effects of this application are as follows: The root mean square (RMS) algorithm is used to determine the voltage operating range of the control point in real time. Only when the voltage exceeds the limit is a rapid effective value calculation based on instantaneous values ​​triggered. The voltage amplitude change rate is extracted using the differential method and then superimposed onto the voltage loop output via a proportional coefficient. This strategy significantly shortens the response delay of the reactive power compensation device during large voltage fluctuations, enhancing the voltage support capability during transient processes. Under steady-state or small disturbances, the original control logic remains unchanged, maintaining the system's stability and impedance characteristics. Compared with existing constant current ride-through control, it achieves a rapid response in the voltage closed loop, avoiding insufficient support capability caused by control mode switching, effectively suppressing the risk of voltage collapse, and improving the safe operation level of the power electronic grid.

[0056] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the above-described method.

[0057] This application also provides a computer-readable storage medium storing a computer program that performs the above-described methods.

[0058] This application also provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of the above-described method.

[0059] like Figure 9 As shown, the electronic device 600 may also include: a communication module 110, an input unit 120, an audio processor 130, a display 160, and a power supply 170. It is worth noting that the electronic device 600 does not necessarily need to include these components. Figure 9 All components shown; in addition, the electronic device 600 may also include Figure 9 For components not shown, please refer to existing technologies.

[0060] like Figure 9 As shown, the central processing unit 100, sometimes also referred to as a controller or operating control, may include a microprocessor or other processor device and / or logic device. The central processing unit 100 receives inputs and controls the operation of various components of the electronic device 600.

[0061] The memory 140 may be, for example, one or more of a cache, flash memory, hard drive, removable media, volatile memory, non-volatile memory, or other suitable devices. It may store the aforementioned failure-related information, and also store a program for executing that information. The central processing unit 100 may execute the program stored in the memory 140 to perform information storage or processing, etc.

[0062] Input unit 120 provides input to central processing unit 100. Input unit 120 may be, for example, a keypad or touch input device. Power supply 170 provides power to electronic device 600. Display 160 displays images and text. Display may be, for example, an LCD display, but is not limited thereto.

[0063] The memory 140 can be a solid-state memory, such as a read-only memory (ROM), random access memory (RAM), a SIM card, etc. It can also be a memory that retains information even when power is off, can be selectively erased, and contains more data; examples of this type of memory are sometimes referred to as EPROMs. The memory 140 can also be some other type of device. The memory 140 includes a buffer memory 141 (sometimes referred to as a buffer). The memory 140 may include an application / function storage unit 142 for storing application programs and function programs or processes for executing the operation of the electronic device 600 via the central processing unit 100.

[0064] The memory 140 may also include a data storage unit (data 143) for storing data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit (driver 144) of the memory 140 may include various drivers for the electronic device's communication functions and / or for performing other functions of the electronic device (such as messaging applications, address book applications, etc.).

[0065] The communication module 110 is a transmitter / receiver 110 that transmits and receives signals via antenna 111. The communication module (transmitter / receiver) 110 is coupled to the central processing unit 100 to provide input signals and receive output signals, which can be the same as in a conventional mobile communication terminal.

[0066] Based on different communication technologies, multiple communication modules 110 can be configured in the same electronic device, such as cellular network modules, Bluetooth modules, and / or wireless LAN modules. The communication module (transmitter / receiver) 110 is also coupled to a speaker 131 and a microphone 132 via an audio processor 130 to provide audio output via the speaker 131 and receive audio input from the microphone 132, thereby enabling typical telecommunications functions. The audio processor 130 may include any suitable buffer, decoder, amplifier, etc. Additionally, the audio processor 130 is coupled to a central processing unit 100, enabling on-device recording via the microphone 132 and on-device playback of stored audio via the speaker 131.

[0067] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0068] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0069] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0070] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0071] The description of the various embodiments above tends to emphasize the differences between the various embodiments. The similarities or similarities between them can be referred to, and for the sake of brevity, they will not be repeated here.

[0072] Those skilled in the art will understand that, in the above-described method of the specific implementation, the order in which each step is written does not imply a strict execution order and does not constitute any limitation on the implementation process. The specific execution order of each step should be determined by its function and possible internal logic.

[0073] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. An additional control method for enhancing the rapidity of the transient voltage response, characterized in that, The method includes: Determine whether the control point is in an unsafe operating range based on the voltage operating status of the control point and the preset voltage operating range; When the control point is in an unsafe operating range, the effective voltage value of the control point is calculated based on the instantaneous three-phase voltage value of the control point; The rate of change of voltage amplitude is calculated based on the effective voltage value, and the rate of change is added to the voltage control loop as a feedback quantity.

2. The additional control method for enhancing the transient voltage response rapidity according to claim 1, wherein, Determining whether the control point is in an unsafe operating range based on the voltage operating status of the control point and the preset voltage operating range includes: The fundamental effective value of the voltage is calculated based on the instantaneous three-phase voltage values ​​at the control points; The control point is determined to be in a safe or unsafe operating range by comparing the fundamental effective value with a preset voltage operating range.

3. The additional control method for enhancing the transient voltage response rapidity according to claim 2, characterized by, The fundamental effective value of the voltage is calculated based on the instantaneous three-phase voltage values ​​at the control points, including: Fourier transform is performed on the instantaneous values ​​of the three-phase voltage to extract the fundamental component; The effective value of the fundamental positive sequence voltage is obtained by positive and negative sequence decomposition calculation.

4. The additional control method for enhancing the transient voltage response rapidity according to claim 1, wherein, The calculation of the effective voltage value of the control point based on the instantaneous three-phase voltage value of the control point includes: The instantaneous values ​​of the three-phase voltages are respectively processed into absolute values ​​to obtain the absolute values ​​of the three-phase voltages; Data points are collected within a preset calculation period for each phase voltage, and the effective voltage value at the current moment is generated based on the maximum value among the absolute values ​​of the three phase voltages.

5. The additional control method for enhancing the transient voltage response rapidity according to claim 1, wherein, Calculating the rate of change of voltage amplitude based on the effective voltage value includes: The rate of change of voltage amplitude is calculated by the difference method based on the ratio of the difference between the effective voltage values ​​obtained in two consecutive preset calculation cycles to the time difference.

6. The additional control method for enhancing the transient voltage response rapidity according to claim 1, wherein, Adding the rate of change as a feedback quantity to the voltage control circuit includes: The rate of change is adjusted by a preset proportional coefficient and then superimposed onto the reactive current reference value.

7. An additional control system to enhance the rapidity of the transient voltage response, characterized by The system includes a judgment module, a calculation module, and a control module; The judgment module is used to determine whether the control point is in an unsafe operating range based on the voltage operating status of the control point and the preset voltage operating range; The calculation module is used to calculate the effective voltage value of the control point based on the instantaneous three-phase voltage value of the control point when the control point is in an unsafe operating range; The control module is used to calculate the rate of change of voltage amplitude based on the effective voltage value, and to add the rate of change as a feedback quantity to the voltage control loop.

8. An electronic device comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the method of any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1 to 6.

10. A computer program product comprising computer programs / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the steps of the method according to any one of claims 1 to 6.

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