CN100440709C - Variable Coefficient Control Method of Rectifier - Google Patents
Variable Coefficient Control Method of RectifierDownload PDFInfo
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Abstract
Translated fromChinese
Description
Translated fromChinese技术领域technical field
本发明涉及整流器的控制技术，尤其涉及一种整流器的变系数控制方法。The invention relates to the control technology of the rectifier, in particular to a variable coefficient control method of the rectifier.
背景技术Background technique
随着市场竞争的加剧，客户对不间断电源(UPS)产品系统性能的要求也越来越高。而这种系统性能的要求更是全方位的，即包括系统的动态响应性能和稳态响应性能两个方面。With the intensification of market competition, customers have higher and higher requirements for the system performance of uninterruptible power supply (UPS) products. The system performance requirements are all-round, including the dynamic response performance and steady-state response performance of the system.
从UPS系统的角度来看，该系统可分为两大部分：整流器和逆变器，而前者作为后者的输入，其性能的改善更是保证系统整体性能提高的前提条件。传统的UPS整流器多采用单系数比例-积分(PI)调节器进行控制，而从系统的整体角度来考虑，不难看出这种方式兼顾稳态和动态特性较为困难。因此，从提高系统性能方面考虑，便有了变系数PI控制应用于UPS整流器的控制。当逆变器输出端突加重载，需要向母线提供较大能量，以减小母线跌幅；当逆变器输出端突卸重载，则需要减少或不向母线提供能量，以抑制母线的过冲；而当系统稳定运行时，则需要PI调节器抑制系统震荡，并确保最小拍无差系统的实现。From the point of view of UPS system, the system can be divided into two parts: rectifier and inverter, and the former is used as the input of the latter, and the improvement of its performance is the precondition to ensure the improvement of the overall performance of the system. Traditional UPS rectifiers mostly use a single-coefficient proportional-integral (PI) regulator for control, but considering the overall system, it is not difficult to see that it is difficult to take into account both steady-state and dynamic characteristics in this way. Therefore, from the perspective of improving system performance, there is a variable coefficient PI control applied to the control of UPS rectifiers. When the output end of the inverter suddenly loads heavily, it needs to provide more energy to the bus to reduce the drop of the bus; when the output end of the inverter unloads suddenly, it needs to reduce or not provide energy to the bus to suppress the drop of the bus Overshoot; and when the system is running stably, a PI regulator is required to suppress system oscillation and ensure the realization of the minimum beat-free system.
而以上所述的系统需求，也正是变系数PI控制的基本思想，当系统处于动态调节过程时，应用大系数对系统进行控制，使系统快速进入稳态，当系统进入稳态过程后，则应用小系数对系统进行控制，以减小直流母线纹波，便于无差系统的实现。The above-mentioned system requirements are also the basic idea of variable coefficient PI control. When the system is in the process of dynamic adjustment, a large coefficient is used to control the system so that the system can quickly enter the steady state. After the system enters the steady state process, A small coefficient is used to control the system to reduce the ripple of the DC bus, which is convenient for the realization of the non-difference system.
图1表示一种UPS整流器的系统控制框图，控制系统分为内环(电流环)和外环(电压环)双PI调节器。而从系统的角度看，UPS逆变器对整流器的要求可以完全由直流母线的特性所体现，因此针对此系统，将变系数控制应用于系统的电压环PI控制器中，以提高母线性能。Figure 1 shows a system control block diagram of a UPS rectifier, the control system is divided into inner loop (current loop) and outer loop (voltage loop) double PI regulator. From the perspective of the system, the requirements of the UPS inverter for the rectifier can be completely reflected by the characteristics of the DC bus. Therefore, for this system, the variable coefficient control is applied to the voltage loop PI controller of the system to improve the performance of the bus.
从以上对变系数控制方法的分析可知，两种系数相互切换的实现尤为重要。如两组系数之间的切换进行的过于缓慢，则不能体现变系数控制方法的优点，如切换过于快速、频繁，则易使系统传递函数不收敛，从而引起系统震荡，并对用户造成严重影响。而现有的变系数切换或神经元控制中，存在上述问题，即在系数切换时均为系数直接切换，从而导致系统的稳定性的降低。From the above analysis of the variable coefficient control method, it can be seen that the realization of the mutual switching of the two coefficients is particularly important. If the switching between the two groups of coefficients is too slow, the advantages of the variable coefficient control method cannot be reflected; if the switching is too fast and frequent, the system transfer function will not converge, which will cause system oscillation and cause serious impact on users . However, in the existing variable coefficient switching or neuron control, there is the above-mentioned problem, that is, the coefficients are switched directly when the coefficients are switched, which leads to the decrease of the stability of the system.
发明内容Contents of the invention
本发明的目的在于提供一种整流器的变系数控制方法，以解决现有变系数控制中在系数切换时存在系统震荡的问题，从而提高整流器的动态和稳定性能。The purpose of the present invention is to provide a rectifier variable coefficient control method to solve the problem of system oscillation during coefficient switching in the existing variable coefficient control, thereby improving the dynamic and stable performance of the rectifier.
为解决上述问题，本发明提供下述技术方案：In order to solve the above problems, the present invention provides the following technical solutions:
一种整流器的变系数控制方法，该整流器在功率驱动信号的控制下进行交流直流变换，所述功率驱动信号由变系数的比例积分PI调节器进行控制，其中电压环PI调节器的比例系数P系数具有大系数PMAX和小系数PMIN；所述方法至少包括步骤：A variable coefficient control method for a rectifier, the rectifier performs AC-DC conversion under the control of a power drive signal, and the power drive signal is controlled by a variable coefficient proportional-integral PI regulator, wherein the proportional coefficient P of the voltage loop PI regulator is The coefficients have a large coefficient PMAX and a small coefficient PMIN ; the method comprises at least the steps of:
第一步、分别将表示整流器正、负直流母线电压的反馈电压值与表示目标母线电压的预定值进行比较，得到表示正、负直流母线电压误差的两个误差值；Step 1: Comparing the feedback voltage values representing the positive and negative DC bus voltages of the rectifier with the predetermined value representing the target bus voltage respectively to obtain two error values representing the positive and negative DC bus voltage errors;
第二步、将所述两个误差值分别与母线电压阈值进行比较；In the second step, the two error values are compared with the bus voltage threshold respectively;
第一种情况、如果其中任意一个误差值不小于母线电压阈值，则将电压环PI调节器的比例系数P设定为大系数PMAX；In the first case, if any one of the error values is not less than the bus voltage threshold, the proportional coefficient P of the voltage loop PI regulator is set to a large coefficient PMAX ;
第二种情况、如果两个误差值均小于母线电压阈值，则将电压环PI调节器当前的比例系数P按预定步长递减后设定比例系数P，以保证比例系数P从大系数PMAX向小系数PMIN切换过程变化缓慢；In the second case, if the two error values are both smaller than the bus voltage threshold, the current proportional coefficient P of the voltage loop PI regulator is decreased by a predetermined step and then the proportional coefficient P is set to ensure that the proportional coefficient P changes from the large coefficient PMAX The process of switching to a small coefficient PMIN changes slowly;
第三步、利用电压环PI调节器的比例系数P和积分系数I计算输出，通过该输出控制功率驱动信号。The third step is to use the proportional coefficient P and the integral coefficient I of the voltage loop PI regulator to calculate the output, and control the power drive signal through the output.
其中：in:
第一步中，从整流器的正、负直流母线采样得到的母线电压经电平转换和模数转换后产生表示正、负直流母线实际电压的反馈电压值。In the first step, the bus voltage sampled from the positive and negative DC buses of the rectifier undergoes level conversion and analog-to-digital conversion to generate a feedback voltage value representing the actual voltage of the positive and negative DC buses.
在电压环PI调节器当前的比例系数P按预定步长递减后还进一步判断比例系数P是否小于小系数PMIN；如果是，则递减后的比例系数P设定为小系数PMIN。After the current proportional coefficient P of the voltage loop PI regulator is decremented by a predetermined step, it is further judged whether the proportional coefficient P is smaller than the small coefficient PMIN ; if yes, the decremented proportional coefficient P is set as the small coefficient PMIN .
通过设置变系数定时计数器来限制电压环PI调解器的比例系数P维持在大系数PMAX状态的持续时间，当每次将电压环PI调节器的比例系数P设定为大系数PMAX时将该变系数定时计数器复位。By setting the variable coefficient timing counter to limit the duration of the proportional coefficient P of the voltage loop PI regulator in the state of large coefficient PMAX , when the proportional coefficient P of the voltage loop PI regulator is set to a large coefficient PMAX each time, it will be The variable coefficient timer counter is reset.
第二步的第二种情况中，在设定比例系数P之前，将所述变系数定时计数器增1并判断变系数定时计数器的值是否大于预定的计数阈值；如果是，表示电压环PI调解器的比例系数P维持在大系数PMAX状态的持续时间已超过限制时间，则将变系数定时计数器的值设置为该预定的计数阈值，并将电压环PI调节器当前的比例系数P按预定步长递减后设定为比例系数P；如果变系数定时计数器的值小于预定的计数阈值，表示电压环PI调解器的比例系数P维持在大系数PMAX状态的持续时间未达到限制时间，则直接将电压环PI调节器的比例系数P设定为大系数PMAX。In the second case of the second step, before setting the proportional coefficient P, increase the variable coefficient timing counter by 1 and judge whether the value of the variable coefficient timing counter is greater than the predetermined counting threshold; if so, it means that the voltage loop PI is mediated If the proportional coefficient P of the regulator is maintained at the large coefficient PMAX state and the duration has exceeded the limit time, the value of the variable coefficient timing counter is set as the predetermined counting threshold, and the current proportional coefficient P of the voltage loop PI regulator is set according to the predetermined value. After the step size is decremented, it is set as the proportional coefficient P; if the value of the variable coefficient timing counter is less than the predetermined counting threshold, it means that the proportional coefficient P of the voltage loop PI modulator maintains the duration of the large coefficient PMAX state and does not reach the limit time, then The proportional coefficient P of the voltage loop PI regulator is directly set to a large coefficient PMAX .
在大、小系数切换过程中，电压环PI调节器中积分器的积分系数I保持不变。In the process of switching between large and small coefficients, the integral coefficient I of the integrator in the voltage loop PI regulator remains unchanged.
当前比例系数P按：P＝PMAX-a*ΔP进行递减，其中：ΔP为预定步长，a依据系统的动态响应指标来确定选取下限，其上限以系统在没有外界扰动的情况下比例系数P成单调递减为原则进行选取，使其不会因为外界扰动而导致大、小系数反复切换。The current proportional coefficient P is decremented according to: P=PMAX -a*ΔP, where: ΔP is the predetermined step size, a is determined according to the dynamic response index of the system to select the lower limit, and its upper limit is the proportional coefficient of the system without external disturbance P is selected based on the principle of monotonically decreasing, so that it will not cause repeated switching between large and small coefficients due to external disturbances.
电压环PI调节器的输出值作为电流环给定值，通过电流环调节输出作用于脉宽调制信号环节，产生脉宽调制信号波，实现对整流器的变系数控制。The output value of the voltage loop PI regulator is used as the given value of the current loop, and the adjusted output of the current loop acts on the pulse width modulation signal link to generate a pulse width modulation signal wave to realize the variable coefficient control of the rectifier.
所述整流器是指不间断电源中的整流器。The rectifier refers to a rectifier in an uninterruptible power supply.
本发明在PI调节器从大系数切换到小系数时，采用缓变过程，避免了切换过快引起的系统震荡。因此，本发明能够在系统可靠、稳定的基础上，使得整流器的动态和稳态性能得以全面提高。When the PI regulator is switched from a large coefficient to a small coefficient, the present invention adopts a slow-change process to avoid system oscillation caused by too fast switching. Therefore, the present invention can comprehensively improve the dynamic and steady-state performance of the rectifier on the basis of reliability and stability of the system.
附图说明Description of drawings
图1为UPS整流器控制示意图；Figure 1 is a schematic diagram of UPS rectifier control;
图2为UPS整流器原理框图；Figure 2 is a block diagram of the UPS rectifier;
图3为系数变换曲线示意图；Fig. 3 is a schematic diagram of coefficient transformation curve;
图4为本发明的流程图。Fig. 4 is a flowchart of the present invention.
具体实施方式Detailed ways
本实施例以不间断电源(UPS)为例对整流器的变系数控制进行说明。这里的交流/直流变换即为交流直流变换，模/数转换即为模数转换。In this embodiment, an uninterruptible power supply (UPS) is taken as an example to illustrate the variable coefficient control of the rectifier. The AC/DC conversion here is the AC-DC conversion, and the analog/digital conversion is the analog-to-digital conversion.
参阅图1所示的控制，令比例-积分调节器(即比例积分调节器)中比例器的P系数用Kp来表示，积分器得到I系数用Ki来表示，设Kpi-Kp+Ki。Referring to the control shown in Figure 1, let the P coefficient of the proportional device in the proportional-integral regulator (that is, the proportional-integral regulator) be represented by Kp, and the I coefficient obtained by the integrator be represented by Ki, and set Kpi-Kp+Ki.
参阅图2所示P系数的变换曲线，其中横轴为UPS系统的直流母线的偏差电压ΔU，纵轴分别为系数Kp和系数Kpi(其中Kpi未标出)。从图2中可知，PI系数的切换是以母线电压波动的幅度是否超出误差带为判断依据的，当母线电压的波动电压大于母线电压阈值dU时，系统由小系数直接切换到大系数工作状态，该过程为瞬变过程，即没有中间过程，即进行参数直接切换。而经PI调节器作用，当母线电压的波动电压ΔU小于母线电压阈值时，系统由大系数工作状态切换到小系数工作状态时，该过程为一个缓慢过程，即由大系数递减，逐渐递减至等于小系数为止。Referring to the conversion curve of P coefficient shown in Fig. 2, the horizontal axis is the deviation voltage ΔU of the DC bus of the UPS system, and the vertical axis is the coefficient Kp and the coefficient Kpi (Kpi is not marked). It can be seen from Figure 2 that the switching of PI coefficients is based on whether the bus voltage fluctuation range exceeds the error band. When the fluctuation voltage of the bus voltage is greater than the bus voltage threshold dU, the system directly switches from the small coefficient to the large coefficient working state , the process is a transient process, that is, there is no intermediate process, that is, the parameters are directly switched. After the action of the PI regulator, when the fluctuating voltage ΔU of the bus voltage is less than the bus voltage threshold, when the system switches from a large coefficient working state to a small coefficient working state, the process is a slow process, that is, the large coefficient decreases gradually to equal to a small coefficient.
而如何使P系数与I系数配合变化，使系统在切换过程中既能保证系统快速性又能保证系统的稳态精度。通过如下分析可知，PI调节器中的I系数主要用于消除系统的静差，并可以起到稳态下减小母线电压直流纹波的目的，但当系统进行PI参数的切换时，系统完全动态调节过程，因此调节I系数的大小无益于系统的稳定。从而得出结论，在大、小系数切换时，I系数保持不变。And how to make the P coefficient and I coefficient change together, so that the system can not only ensure the rapidity of the system but also the steady-state accuracy of the system during the switching process. Through the following analysis, it can be seen that the I coefficient in the PI regulator is mainly used to eliminate the static error of the system, and can reduce the DC ripple of the bus voltage in a steady state. However, when the system switches PI parameters, the system is completely It is a dynamic adjustment process, so adjusting the size of the I coefficient is not conducive to the stability of the system. Thus, it can be concluded that when the large and small coefficients are switched, the I coefficient remains unchanged.
参阅图3所示，UPS整流器的功率电路部分主要包括主拓扑、IGBT驱动电路和检测电路。实现PI调节的控制算法主要是通过对数字信号处理器(DSP)进行编程来实现。主拓扑中主要包括整流器、逆变器及电池充放电路，该整流器在IGBT驱动电路输出的功率驱动信号控制下将输入的交流电转换为直流电并通过直流母线提供给逆变器。检测板从主电路中的直流母线获取电压和电流信号并反馈给DSP，由DSP判断是选择PI调节器的系数并计算输出，用于脉宽调制信号(PWM)环节，产生PWM波，用该输出控制IGBT电路产生功率驱动信号。Referring to Figure 3, the power circuit part of the UPS rectifier mainly includes the main topology, IGBT drive circuit and detection circuit. The control algorithm to realize PI adjustment is mainly realized by programming the digital signal processor (DSP). The main topology mainly includes a rectifier, an inverter, and a battery charging and discharging circuit. Under the control of the power drive signal output by the IGBT drive circuit, the rectifier converts the input AC power into DC power and supplies it to the inverter through the DC bus. The detection board obtains the voltage and current signals from the DC bus in the main circuit and feeds them back to the DSP. The DSP judges to select the coefficient of the PI regulator and calculate the output, which is used in the pulse width modulation signal (PWM) link to generate PWM waves. The output controls the IGBT circuit to generate a power drive signal.
DSP中保存有以下信息：The following information is stored in the DSP:
确定是否切换系数的母线电压阈值dU；反应系统中直流母线电压的预定值；PI调节器中比例器的大系数PMAX和小系数PMIN；PI调节器中积分器的大系数IMAX和小系数为IMIN；由大系数PMAX到小系数PMIN的步长a。Determine whether to switch the bus voltage threshold dU of the coefficient; the predetermined value of the DC bus voltage in the reaction system; the large coefficient PMAX and the small coefficient PMIN of the proportional device in the PI regulator; the large coefficient IMAX and the small coefficient of the integrator in the PI regulator The coefficient is IMIN ; the step size a from the large coefficient PMAX to the small coefficient PMIN .
在本发明中，当DSP确定母线波动电压ΔU大于等于母线电压阈值δU时，系数Kp由小系数PMIN(如果当前为小系数PMIN)向大系数PMAX切换，切换过程为瞬变过程；当DSP确定母线波动电压ΔU小于母线电压阈值δU时，系数Kp由大系数PMAX向(如果当前为大系数PMAX)小系数PMIN切换，切换过程为缓变过程，即按步长递减。In the present invention, when the DSP determines that the bus fluctuation voltage ΔU is greater than or equal to the bus voltage threshold δU, the coefficient Kp is switched from a small coefficient PMIN (if it is currently a small coefficient PMIN ) to a large coefficient PMAX , and the switching process is a transient process; When the DSP determines that the bus fluctuating voltage ΔU is less than the bus voltage threshold δU, the coefficient Kp switches from a large coefficient PMAX to a small coefficient PMIN (if it is currently a large coefficient PMAX ), and the switching process is a slow-change process, that is, it decreases according to the step size.
参阅图4所示，UPS中整流器的变系数控制过程如下：Referring to Figure 4, the variable coefficient control process of the rectifier in the UPS is as follows:
步骤10：分别将表示整流器正、负直流母线电压的反馈电压值与表示目标母线电压的预定值进行比较，得到表示正、负直流母线电压误差的两个误差值。Step 10: Comparing the feedback voltage values representing the positive and negative DC bus voltages of the rectifier with the predetermined value representing the target bus voltage respectively to obtain two error values representing the errors of the positive and negative DC bus voltages.
通过检测板从主电路中整流器的正、负直流母线上检测电压(即正直流母线和负直流母线分别与中线的电压)，分别将电压进行电平转换为反应实际正、负直流母线电压的反馈电压并提供给DSP。DSP将两反馈电压进行模/数(A/D)转换，并分别与反应目标母线电压的预定值进行比较得到反应误差电压的两个误差值。Through the detection board, the voltage is detected from the positive and negative DC buses of the rectifier in the main circuit (that is, the voltages of the positive and negative DC buses and the neutral line respectively), and the voltages are level-converted to reflect the actual positive and negative DC bus voltages respectively. Feedback voltage and provide to DSP. The DSP performs analog/digital (A/D) conversion on the two feedback voltages, and compares them with the predetermined value of the reaction target bus voltage respectively to obtain two error values of the reaction error voltage.
步骤20：将正母线的误差值与母线电压阈值δU进行比较，如果误差值不小于母线电压阈值δU，则进行步骤40；否则进行步骤30。Step 20: Compare the error value of the positive bus with the bus voltage threshold δU, if the error value is not less than the bus voltage threshold δU, go to step 40; otherwise go to step 30.
步骤30：将负母线的误差值与母线电压阈值δU进行比较，如果误差值不小于母线电压阈值δU，则进行步骤40；否则进行步骤50。Step 30: Compare the error value of the negative bus with the bus voltage threshold δU, if the error value is not less than the bus voltage threshold δU, go to step 40; otherwise go to step 50.
步骤40：将变系数定时计数器清0，即从0开始计时。Step 40: Clear the variable coefficient timing counter to 0, that is, start counting from 0.
变系数定时计数器用来限制电压环的P系数维持在大系数PMAX状态的持续时间，每次将电压环PI调节器的P系数设定为大系数PMAX时将该变系数定时计数器复位(清0)。The variable coefficient timing counter is used to limit the P coefficient of the voltage loop to maintain the duration of the large coefficient PMAX state, and the variable coefficient timing counter is reset every time the P coefficient of the voltage loop PI regulator is set to a large coefficient PMAX ( cleared to 0).
步骤50：将变系数定时计数器增1。Step 50: Increment the variable coefficient timing counter by 1.
步骤60：判断变系数定时计数器的值是否大于阈值计数。Step 60: Judging whether the value of the variable coefficient timing counter is greater than the threshold count.
如果是，表示电压环的P系数维持在大系数PMAX状态的持续时间已超过限制时间，则进行步骤80；否则，表示电压环的P系数维持在大系数PMAX状态的持续时间未达到限制时间，则进行步骤70；If yes, it means that the duration of the P coefficient of the voltage loop maintained in the state of large coefficient PMAX has exceeded the limit time, then proceed to step 80; otherwise, the duration of the P coefficient of the voltage loop maintained in the state of large coefficient PMAX has not reached the limit time, proceed to step 70;
步骤70：将电压环PI调节器的P系数设定为大系数PMAX。Step 70: Set the P coefficient of the voltage loop PI regulator to a large coefficient PMAX .
在选定大系数控制时，为满足系统的动态要求，调节器采用瞬变切换原则，即DSP采用变量直接赋值的方法来实现。When selecting large coefficient control, in order to meet the dynamic requirements of the system, the regulator adopts the principle of transient switching, that is, DSP adopts the method of directly assigning values to variables to realize.
步骤80：将计数器的值设置为该预定的技术阈值。Step 80: Set the value of the counter to the predetermined technical threshold.
步骤90：按预定步长递减电压环PI调节器当前的P系数，并设定P系数，以保证P系数从大系数PMAX向小系数PMIN切换的为缓变过程。Step 90: Decrease the current P coefficient of the voltage loop PI regulator according to a predetermined step size, and set the P coefficient to ensure that the P coefficient switches from a large coefficient PMAX to a small coefficient PMIN in a gradual change process.
在递减当前的P系数后判断是否小于系数PMIN；如果是，则递减后的P系数设置为小系数PMIN。After decrementing the current P coefficient, it is judged whether it is smaller than the coefficient PMIN ; if yes, the decremented P coefficient is set as the small coefficient PMIN .
DSP根据切换方程PMIN＝PMAX-a*ΔP来进行系数切换，其中：ΔP为P系数可以实现的最小变化量，将其作为步长；a的选取原则依据系统的动态响应指标来确定a的选取下限，而a的上限以系统在没有外界扰动的情况下(如突加突卸负载)P系数成单调递减为原则进行选取(而a系数一旦选定，则不再变化，除非系统的硬件参数有所变化)。DSP performs coefficient switching according to the switching equation PMIN = PMAX -a*ΔP, where: ΔP is the minimum change that P coefficient can realize, which is used as the step size; the selection principle of a is determined according to the dynamic response index of the system The selection lower limit of a, and the upper limit of a is selected on the basis of the principle that the P coefficient of the system is monotonically decreasing in the absence of external disturbances (such as sudden loading and unloading) (and once the a coefficient is selected, it will not change unless the system hardware parameters have changed).
步骤100：设置电压环的积分系数(I系数)、电流环的P系数和I系数。Step 100: Setting the integral coefficient (I coefficient) of the voltage loop, the P coefficient and the I coefficient of the current loop.
步骤110：根据电压环PI调节器的P系数和I系数计算PI调节的输出。Step 110: Calculate the PI regulated output according to the P coefficient and I coefficient of the voltage loop PI regulator.
步骤120：将步骤110中的输出值作为电流环的给定值，并以电流环调节器输出作为PFC电路的PWM开关量，用于作用于脉宽调制环节，产生PWM波，从而实现对整流器的变系数控制。Step 120: Use the output value in
在系统采用变系数PI控制时，I系数只影响系统的稳态过程，因此，在电压环的P系数切换过程中电压环的I系数不变。When the system adopts variable coefficient PI control, the I coefficient only affects the steady-state process of the system, so the I coefficient of the voltage loop does not change during the switching process of the P coefficient of the voltage loop.
步骤90中的递减P系数可在之前的某一步骤进行，如步骤10或步骤20之前均可。Decrementing the P coefficient in
在变系数控制中，通过上述方法能够在系统可靠、稳定的基础上，使得UPS整流器的动态和稳定性能得以全面提高。In the variable coefficient control, the dynamic and stable performance of the UPS rectifier can be comprehensively improved on the basis of the reliability and stability of the system through the above method.
虽然本实施例以UPS为例进行说明，但上述方法适用于各种PI调节器的变系数控制中，如位置式PI调节器，增量式PI调节器等。Although this embodiment uses UPS as an example for illustration, the above method is applicable to variable coefficient control of various PI regulators, such as position PI regulators, incremental PI regulators, and the like.
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| US7768805B2 (en)* | 2007-03-09 | 2010-08-03 | General Electric Company | Clean input UPS with fast rectifier control and improved battery life |
| CN101483345B (en)* | 2009-02-27 | 2012-06-13 | 上海航锐电源科技有限公司 | Control method for photovoltaic grid connection inverter with wide input range |
| CN101814752B (en)* | 2010-03-23 | 2012-07-04 | 艾默生网络能源有限公司 | Control system and method of UPS (Uninterrupted Power System) |
| CN103248251B (en)* | 2013-05-17 | 2016-06-08 | 成都英格瑞德电气有限公司 | Automatic variable coefficient control method for inverter |
| CN105322858B (en)* | 2015-05-25 | 2018-06-26 | 深圳市振邦智能科技股份有限公司 | A kind of method and device for resisting busbar voltage fluctuation |
| CN109149592B (en)* | 2018-08-16 | 2021-09-07 | 国网内蒙古东部电力有限公司电力科学研究院 | Reactive power adaptive control system and method for phase modulation based on bus voltage variation value |
| CN110149067B (en)* | 2019-05-23 | 2020-06-30 | 四川长虹电器股份有限公司 | PI partition control method of inverter system |
| CN111697901B (en)* | 2020-06-24 | 2021-08-27 | 浙江大华技术股份有限公司 | Control method, control equipment and control system of servo motor |
| CN111969895B (en)* | 2020-08-04 | 2021-11-09 | 清能德创电气技术（北京）有限公司 | Safe shutdown method and system under motor contracting brake failure state |
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