CN115085571B - Inverter system control method and protection circuit - Google Patents

Inverter system control method and protection circuit Download PDF

Info

Publication number
CN115085571B
CN115085571B CN202210990137.0A CN202210990137A CN115085571B CN 115085571 B CN115085571 B CN 115085571B CN 202210990137 A CN202210990137 A CN 202210990137A CN 115085571 B CN115085571 B CN 115085571B
Authority
CN
China
Prior art keywords
circuit
inverter system
fault
state
conversion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202210990137.0A
Other languages
Chinese (zh)
Other versions
CN115085571A (en
Inventor
莫翔学
兰金秋
陆华峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen Daipusen New Energy Technology Co ltd
Original Assignee
Shenzhen Daipusen New Energy Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen Daipusen New Energy Technology Co ltd filed Critical Shenzhen Daipusen New Energy Technology Co ltd
Priority to CN202210990137.0A priority Critical patent/CN115085571B/en
Publication of CN115085571A publication Critical patent/CN115085571A/en
Application granted granted Critical
Publication of CN115085571B publication Critical patent/CN115085571B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output
    • H02M7/42—Conversion of DC power input into AC power output without possibility of reversal
    • H02M7/44—Conversion of DC power input into AC power output without possibility of reversal by static converters
    • H02M7/48—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of DC power input into AC power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. DC/AC converters

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

本发明公开一种逆变系统控制方法和保护电路，涉及逆变保护技术领域，解决的技术问题是逆变系统控制和保护，本发明能够自动化获取所述逆变系统的电路状态参数和运行数据参数；根据电路状态参数以及运行数据参数对变换电路的运行模式进行调整，运行模式控制变换逆变系统变换电路的功率MOSFRT关断状态；通过故障诊断函数判断变换电路中故障数据信息，以切换或者调整逆变系统的运行状态，其中故障诊断函数通过转换公式实现变换电路中故障数据信息输出转换。本发明能够大大提高逆变系统控制能力和保护能力。

Figure 202210990137

The invention discloses an inverter system control method and protection circuit, relates to the technical field of inverter protection, and solves the technical problem of inverter system control and protection. The invention can automatically obtain circuit state parameters and operating data of the inverter system Parameters; adjust the operation mode of the conversion circuit according to the circuit state parameters and operation data parameters, and the operation mode controls the power MOSFRT off state of the conversion inverter system conversion circuit; judges the fault data information in the conversion circuit through the fault diagnosis function to switch or Adjust the operating state of the inverter system, wherein the fault diagnosis function realizes the output conversion of the fault data information in the conversion circuit through the conversion formula. The invention can greatly improve the control capability and protection capability of the inverter system.

Figure 202210990137

Description

逆变系统控制方法和保护电路Inverter system control method and protection circuit

技术领域technical field

本发明涉及控制技术领域，且更具体地涉及一种逆变系统控制方法和保护电路。The invention relates to the technical field of control, and more particularly relates to a control method and a protection circuit of an inverter system.

背景技术Background technique

逆变系统是指将直流转换成交流的换流器，保护电路是指防止电流冲击、电压冲击等保护电路正常不受影响的附加电路，逆变系统包括逆变器及其保护控制电路。逆变系统包括逆变器及其保护控制电路。逆变器是指将直流转换成交流的换流器，保护电路是指防止电流冲击、电压冲击等保护电路正常不受影响的附加电路。在逆变系统应用过程中，如何实现逆变系统的控制和电路保护是亟待解决的技术问题，现有技术也有控制方法和保护电路，但是在应用过程中，控制能力滞后，保护电路工作效率低下，在实现逆变系统控制时，自动化程度差。The inverter system refers to a converter that converts DC to AC. The protection circuit refers to an additional circuit that prevents current shocks, voltage shocks, etc. from being affected normally. The inverter system includes an inverter and its protection control circuit. The inverter system includes the inverter and its protection control circuit. The inverter refers to a converter that converts direct current into alternating current, and the protection circuit refers to an additional circuit that prevents current shocks, voltage shocks, and other protection circuits from being affected normally. In the application process of the inverter system, how to realize the control and circuit protection of the inverter system is a technical problem that needs to be solved urgently. The existing technology also has control methods and protection circuits, but in the application process, the control ability is lagging behind, and the working efficiency of the protection circuit is low. , In the realization of inverter system control, the degree of automation is poor.

发明内容Contents of the invention

针对上述技术的不足，本发明公开一种逆变系统控制方法和保护电路，能够大大提高逆变系统控制能力，并能够提高逆变系统的保护能力。Aiming at the deficiencies of the above technologies, the present invention discloses an inverter system control method and a protection circuit, which can greatly improve the control capability of the inverter system and the protection capability of the inverter system.

本发明采用以下技术方案：The present invention adopts following technical scheme:

一种逆变系统控制方法，其中包括以下方法：A method for controlling an inverter system, comprising the following methods:

步骤一、获取所述逆变系统的电路状态参数和运行数据参数；采集到逆变系统电 路中输出的原始样本数据特征向量为

Figure 281597DEST_PATH_IMAGE001
，原始样本数据联合概率密度函数为
Figure 57792DEST_PATH_IMAGE002
，数据特征向量
Figure 385000DEST_PATH_IMAGE003
的
Figure 108105DEST_PATH_IMAGE004
阶累积通过累积量生成函数得到： Step 1. Obtain the circuit state parameters and operating data parameters of the inverter system; the original sample data eigenvectors collected and output in the inverter system circuit are
Figure 281597DEST_PATH_IMAGE001
, the joint probability density function of the original sample data is
Figure 57792DEST_PATH_IMAGE002
, the data eigenvector
Figure 385000DEST_PATH_IMAGE003
of
Figure 108105DEST_PATH_IMAGE004
The order cumulation is obtained by the cumulant generating function:

Figure 735527DEST_PATH_IMAGE005
（1）
Figure 735527DEST_PATH_IMAGE005
(1)

在公式（1）中，当

Figure 620306DEST_PATH_IMAGE006
时，得到
Figure 434809DEST_PATH_IMAGE007
阶矩和
Figure 368130DEST_PATH_IMAGE008
阶累积量，
Figure 99326DEST_PATH_IMAGE008
阶累积量通过
Figure 905739DEST_PATH_IMAGE009
阶矩计算得到，r表示常数，
Figure 722385DEST_PATH_IMAGE010
表示电路状态参数，
Figure 6867DEST_PATH_IMAGE011
表示运行数据参数，
Figure 592569DEST_PATH_IMAGE012
表示运行 数据参数数据集合； In formula (1), when
Figure 620306DEST_PATH_IMAGE006
when, get
Figure 434809DEST_PATH_IMAGE007
sum of moments
Figure 368130DEST_PATH_IMAGE008
step cumulant,
Figure 99326DEST_PATH_IMAGE008
order cumulant through
Figure 905739DEST_PATH_IMAGE009
The order moment is calculated, r represents a constant,
Figure 722385DEST_PATH_IMAGE010
Indicates the circuit state parameter,
Figure 6867DEST_PATH_IMAGE011
Indicates the operating data parameters,
Figure 592569DEST_PATH_IMAGE012
Indicates the running data parameter data set;

步骤二、根据电路状态参数以及运行数据参数对变换电路的运行模式进行调整，其中运行模式控制变换逆变系统变换电路的功率MOSFRT关断状态；Step 2. Adjust the operation mode of the conversion circuit according to the circuit state parameters and the operation data parameters, wherein the operation mode controls the power MOSFRT off state of the conversion circuit of the conversion inverter system;

步骤三、通过故障诊断函数判断变换电路中故障数据信息，以切换或者调整逆变系统的运行状态，其中故障诊断函数通过转换公式实现变换电路中故障数据信息输出转换，其中：Step 3, judging the fault data information in the conversion circuit through the fault diagnosis function to switch or adjust the operating state of the inverter system, wherein the fault diagnosis function realizes the output conversion of the fault data information in the conversion circuit through a conversion formula, wherein:

转换公式为：The conversion formula is:

Figure 835463DEST_PATH_IMAGE013
（2）
Figure 835463DEST_PATH_IMAGE013
(2)

在公式（2）中，

Figure 139405DEST_PATH_IMAGE014
表示编码器输出值，
Figure 24316DEST_PATH_IMAGE015
表示故障信息，当
Figure 464524DEST_PATH_IMAGE016
大于1时，逆变 系统的运行状态记作为一种状态，当
Figure 612740DEST_PATH_IMAGE017
小于1时，逆变系统的运行状态记作为另一种状 态，运行状态的数据属性记作为符号集
Figure 403979DEST_PATH_IMAGE018
，
Figure 295842DEST_PATH_IMAGE019
为集合
Figure 856137DEST_PATH_IMAGE020
不相交的非空子集，
Figure 96625DEST_PATH_IMAGE021
为子 集的个数，对于电路故障信号的故障随机变量
Figure 860313DEST_PATH_IMAGE022
，三阶累积量推导函数为： In formula (2),
Figure 139405DEST_PATH_IMAGE014
Indicates the encoder output value,
Figure 24316DEST_PATH_IMAGE015
Indicates fault information, when
Figure 464524DEST_PATH_IMAGE016
When greater than 1, the running state of the inverter system is recorded as a state, when
Figure 612740DEST_PATH_IMAGE017
When it is less than 1, the running state of the inverter system is recorded as another state, and the data attribute of the running state is recorded as a symbol set
Figure 403979DEST_PATH_IMAGE018
,
Figure 295842DEST_PATH_IMAGE019
for collection
Figure 856137DEST_PATH_IMAGE020
disjoint non-empty subsets,
Figure 96625DEST_PATH_IMAGE021
is the number of subsets, for the fault random variable of the circuit fault signal
Figure 860313DEST_PATH_IMAGE022
, the third-order cumulant derivation function is:

Figure 601873DEST_PATH_IMAGE023
（3）
Figure 601873DEST_PATH_IMAGE023
(3)

在公式（3）中，设定采集到故障电路的特征信号的离散时间序列为0。In formula (3), the discrete time series of the characteristic signal of the fault circuit collected is set to 0.

作为本发明进一步的技术方案，电路状态参数的获取方法为：As a further technical solution of the present invention, the acquisition method of the circuit state parameter is:

若接收到逆变系统控制启动指令，获取输入电压、输入电流、纹波数据信息、扰度数据信息以及实时直流母线电压的电路状态参数；通过输入电压计算得到最低直流母线电压的参考状态参数。If the inverter system control start command is received, the input voltage, input current, ripple data information, disturbance data information and circuit state parameters of the real-time DC bus voltage are obtained; the reference state parameters of the lowest DC bus voltage are obtained by calculating the input voltage.

作为本发明进一步的技术方案，运行数据参数的获取方法为：As a further technical solution of the present invention, the acquisition method of the operating data parameters is:

若接收到逆变系统控制启动指令，获取输入电压、输入电流、纹波数据信息、扰度数据信息以及实时直流母线电压的电路状态参数；通过输入电压计算得到最低直流母线电压的参考状态参数，以及电流、电压、容量、不同时间段下各个逆变器的发电量及辐照值。If the inverter system control start command is received, the input voltage, input current, ripple data information, disturbance data information and circuit state parameters of the real-time DC bus voltage are obtained; the reference state parameters of the lowest DC bus voltage are obtained by calculating the input voltage, And current, voltage, capacity, power generation and radiation value of each inverter in different time periods.

作为本发明进一步的技术方案，通过采集到的电路状态参数和运行数据参数调节变换电路的运行模式。As a further technical solution of the present invention, the operation mode of the conversion circuit is adjusted through the collected circuit state parameters and operation data parameters.

作为本发明进一步的技术方案，故障诊断函数通过以下方法实现电路数据信息诊断：As a further technical solution of the present invention, the fault diagnosis function realizes circuit data information diagnosis by the following methods:

当采样故障的特征信号

Figure 501827DEST_PATH_IMAGE024
为均值为0的平稳随机过程时，特征信号的
Figure 506692DEST_PATH_IMAGE025
阶累积量 函数表示为： When sampling the characteristic signal of a fault
Figure 501827DEST_PATH_IMAGE024
When it is a stationary random process with a mean value of 0, the characteristic signal
Figure 506692DEST_PATH_IMAGE025
The order cumulant function is expressed as:

Figure 679047DEST_PATH_IMAGE026
（4）
Figure 679047DEST_PATH_IMAGE026
(4)

在公式（4）中，特征信号的

Figure 924433DEST_PATH_IMAGE027
阶累积量与时间
Figure 459319DEST_PATH_IMAGE028
的变化无关，为滞后
Figure 120239DEST_PATH_IMAGE029
相关的函数， 特征信号
Figure 904524DEST_PATH_IMAGE030
为平稳数据信息，故障电路的采样信号为特征信号
Figure 676302DEST_PATH_IMAGE031
的
Figure 800116DEST_PATH_IMAGE027
阶矩和
Figure 818887DEST_PATH_IMAGE027
阶累 积量，取
Figure 778884DEST_PATH_IMAGE032
后的一个随机向量的
Figure 869200DEST_PATH_IMAGE027
阶矩和
Figure 863832DEST_PATH_IMAGE027
阶累积量，且仅有
Figure 912559DEST_PATH_IMAGE033
个独立元，则简化 得到的电路特征信号的三阶累积量函数表示为： In formula (4), the characteristic signal of
Figure 924433DEST_PATH_IMAGE027
Order cumulants and time
Figure 459319DEST_PATH_IMAGE028
The change has nothing to do with the hysteresis
Figure 120239DEST_PATH_IMAGE029
Correlation function, characteristic signal
Figure 904524DEST_PATH_IMAGE030
For stable data information, the sampling signal of the fault circuit is the characteristic signal
Figure 676302DEST_PATH_IMAGE031
of
Figure 800116DEST_PATH_IMAGE027
sum of moments
Figure 818887DEST_PATH_IMAGE027
order cumulant, take
Figure 778884DEST_PATH_IMAGE032
After a random vector of
Figure 869200DEST_PATH_IMAGE027
sum of moments
Figure 863832DEST_PATH_IMAGE027
order cumulant, and only
Figure 912559DEST_PATH_IMAGE033
Independent elements, then the third-order cumulant function of the simplified circuit characteristic signal is expressed as:

Figure 625432DEST_PATH_IMAGE034
（5）
Figure 625432DEST_PATH_IMAGE034
(5)

在公式（5）中，根据特征信号的

Figure 988280DEST_PATH_IMAGE027
阶矩和
Figure 24369DEST_PATH_IMAGE027
阶累积量可得到特征信号
Figure 197992DEST_PATH_IMAGE035
的峭度 和偏度，则
Figure 381849DEST_PATH_IMAGE036
，得到三阶累积量的1维切片表示偏度
Figure 564700DEST_PATH_IMAGE037
，令四阶累积量 的
Figure 517612DEST_PATH_IMAGE038
得到峭度
Figure 924454DEST_PATH_IMAGE039
，得到电路故障特征信号的峭 度和偏度均为无量纲的信号特征值，根据逆变系统参数变化对电路进行故障诊断； In formula (5), according to the characteristic signal of
Figure 988280DEST_PATH_IMAGE027
sum of moments
Figure 24369DEST_PATH_IMAGE027
The characteristic signal can be obtained by the order cumulant
Figure 197992DEST_PATH_IMAGE035
kurtosis and skewness, then
Figure 381849DEST_PATH_IMAGE036
, get a 1-dimensional slice of the third-order cumulant to represent the skewness
Figure 564700DEST_PATH_IMAGE037
, so that the fourth-order cumulant
Figure 517612DEST_PATH_IMAGE038
get kurtosis
Figure 924454DEST_PATH_IMAGE039
, the kurtosis and skewness of the circuit fault characteristic signal are both dimensionless signal characteristic values, and the fault diagnosis of the circuit is carried out according to the parameter change of the inverter system;

通过偏度

Figure 595607DEST_PATH_IMAGE040
判断逆变系统电路信号的概率分布是否对称，峭度
Figure 316569DEST_PATH_IMAGE041
反映逆变系统输 出信号概率分布的陡峭程度，信号中均值为
Figure 389568DEST_PATH_IMAGE042
、方差为
Figure 91944DEST_PATH_IMAGE043
的高斯随机变量的
Figure 735546DEST_PATH_IMAGE044
阶转换公式 的结果值
Figure 306205DEST_PATH_IMAGE045
。 by skewness
Figure 595607DEST_PATH_IMAGE040
Judging whether the probability distribution of the inverter system circuit signal is symmetrical, kurtosis
Figure 316569DEST_PATH_IMAGE041
Reflects the steepness of the probability distribution of the output signal of the inverter system, and the average value of the signal is
Figure 389568DEST_PATH_IMAGE042
, the variance is
Figure 91944DEST_PATH_IMAGE043
Gaussian random variable of
Figure 735546DEST_PATH_IMAGE044
The resulting value of the order conversion formula
Figure 306205DEST_PATH_IMAGE045
.

一种逆变系统控制保护电路，包括逆变系统，其中所述保护电路包括：A control and protection circuit for an inverter system, including an inverter system, wherein the protection circuit includes:

故障信号采集模块电路，用于采集逆变系统运行过程中的故障数据信息；The fault signal acquisition module circuit is used to collect fault data information during the operation of the inverter system;

变换电路，用于变换采集逆变系统运行过程中的故障数据信息；Transformation circuit, used to transform and collect fault data information during operation of the inverter system;

功率MOSFRT电路，用于控制变换电路实现数据信息的变换；The power MOSFRT circuit is used to control the transformation circuit to realize the transformation of data information;

其中逆变系统的输出端与故障信号采集模块电路的输入端连接，故障信号采集模块电路的输出端与变换电路的输入端连接，所述变换电路的输出端与功率MOSFRT电路的输入端连接，所述功率MOSFRT电路的输出端与逆变系统的输入端连接。Wherein the output end of the inverter system is connected with the input end of the fault signal acquisition module circuit, the output end of the fault signal acquisition module circuit is connected with the input end of the conversion circuit, and the output end of the conversion circuit is connected with the input end of the power MOSFRT circuit, The output terminal of the power MOSFRT circuit is connected with the input terminal of the inverter system.

作为本发明进一步的技术方案，所述故障信号采集模块电路包括STM32F407VET6芯片的嵌入式控制器与所述STM32F407VET6芯片的嵌入式控制器连接的LM358DR2G芯片电路和电阻电路。As a further technical solution of the present invention, the fault signal acquisition module circuit includes an LM358DR2G chip circuit and a resistor circuit connected to the embedded controller of the STM32F407VET6 chip and the embedded controller of the STM32F407VET6 chip.

作为本发明进一步的技术方案，变换电路包括嵌入式控制器与所述嵌入式控制器 连接的主电路功率二极管、电容

Figure 984442DEST_PATH_IMAGE046
、
Figure 920037DEST_PATH_IMAGE047
、电感
Figure 237886DEST_PATH_IMAGE048
、
Figure 300651DEST_PATH_IMAGE049
和电阻电路，其中控制电路的直流输 入电压为28V，负载电阻为
Figure 82662DEST_PATH_IMAGE050
，其中所述嵌入式控制器还连接有电源电路和LM317单片线 性的电源电压调节器，其中LM317单片线性的电源电压调节器使变换电路的输出电压范围 介乎1.2~37V，电源电压调节器的电压调节范围为： As a further technical solution of the present invention, the conversion circuit includes an embedded controller connected to the embedded controller with a main circuit power diode, a capacitor
Figure 984442DEST_PATH_IMAGE046
,
Figure 920037DEST_PATH_IMAGE047
,inductance
Figure 237886DEST_PATH_IMAGE048
,
Figure 300651DEST_PATH_IMAGE049
and resistance circuit, where the DC input voltage of the control circuit is 28V, and the load resistance is
Figure 82662DEST_PATH_IMAGE050
, wherein the embedded controller is also connected with a power supply circuit and a LM317 single-chip linear power supply voltage regulator, wherein the LM317 single-chip linear power supply voltage regulator makes the output voltage range of the conversion circuit between 1.2~37V, and the power supply voltage is regulated The regulator voltage regulation range is:

Figure 205470DEST_PATH_IMAGE051
（6）
Figure 205470DEST_PATH_IMAGE051
(6)

在公式（6）中，其中

Figure 338511DEST_PATH_IMAGE052
表示调节端电流，
Figure 204967DEST_PATH_IMAGE053
表示调节端对地电阻，
Figure 903802DEST_PATH_IMAGE054
表示调节端与 输出端之间的电阻，变换电路中的主要测点为
Figure 197511DEST_PATH_IMAGE055
、
Figure 552269DEST_PATH_IMAGE056
、
Figure 210697DEST_PATH_IMAGE057
、
Figure 701721DEST_PATH_IMAGE058
、
Figure 87703DEST_PATH_IMAGE059
、
Figure 946069DEST_PATH_IMAGE060
、
Figure 482224DEST_PATH_IMAGE061
、
Figure 93334DEST_PATH_IMAGE062
、
Figure 994425DEST_PATH_IMAGE063
和
Figure 323775DEST_PATH_IMAGE064
。 In formula (6), where
Figure 338511DEST_PATH_IMAGE052
Indicates the adjustment terminal current,
Figure 204967DEST_PATH_IMAGE053
Indicates the resistance of the adjustment terminal to ground,
Figure 903802DEST_PATH_IMAGE054
Indicates the resistance between the adjustment terminal and the output terminal, and the main measuring point in the conversion circuit is
Figure 197511DEST_PATH_IMAGE055
,
Figure 552269DEST_PATH_IMAGE056
,
Figure 210697DEST_PATH_IMAGE057
,
Figure 701721DEST_PATH_IMAGE058
,
Figure 87703DEST_PATH_IMAGE059
,
Figure 946069DEST_PATH_IMAGE060
,
Figure 482224DEST_PATH_IMAGE061
,
Figure 93334DEST_PATH_IMAGE062
,
Figure 994425DEST_PATH_IMAGE063
and
Figure 323775DEST_PATH_IMAGE064
.

作为本发明进一步的技术方案，变换电路还设置有Sepic斩波变换器，使电路在连续导通模式下限制启动电流和冲击电流。As a further technical solution of the present invention, the conversion circuit is also provided with a Sepic chopper converter, so that the circuit can limit the start-up current and the inrush current in the continuous conduction mode.

作为本发明进一步的技术方案，功率MOSFRT电路导通状态下变换器产生三个回 路，将电源、电感

Figure 601304DEST_PATH_IMAGE065
和功率MOSFET构成第一回路，此时经过
Figure 801341DEST_PATH_IMAGE065
的电流在电源电压作用下线 性增长，第二回路包括电容
Figure 794705DEST_PATH_IMAGE066
、功率MOSFET和电感
Figure 955559DEST_PATH_IMAGE067
，此时电感的电流在电容
Figure 240041DEST_PATH_IMAGE066
放电的影 响下增加，第三回路通过电容
Figure 232267DEST_PATH_IMAGE068
向主电路的负债供电，根据
Figure 724429DEST_PATH_IMAGE069
，电容
Figure 513524DEST_PATH_IMAGE068
上的电压下降，
Figure 647702DEST_PATH_IMAGE068
的值大于10 000μF时，则
Figure 25594DEST_PATH_IMAGE070
。 As a further technical solution of the present invention, the converter generates three loops under the conduction state of the power MOSFRT circuit, and the power supply, the inductor
Figure 601304DEST_PATH_IMAGE065
and the power MOSFET constitute the first loop, at this time through
Figure 801341DEST_PATH_IMAGE065
The current increases linearly under the action of the power supply voltage, and the second loop includes a capacitor
Figure 794705DEST_PATH_IMAGE066
, power MOSFET and inductor
Figure 955559DEST_PATH_IMAGE067
, at this time the current in the inductor is in the capacitor
Figure 240041DEST_PATH_IMAGE066
increase under the influence of the discharge, the third loop through the capacitor
Figure 232267DEST_PATH_IMAGE068
supply to the liabilities of the main circuit, according to
Figure 724429DEST_PATH_IMAGE069
,capacitance
Figure 513524DEST_PATH_IMAGE068
voltage drop on the
Figure 647702DEST_PATH_IMAGE068
value greater than 10 000µF, the
Figure 25594DEST_PATH_IMAGE070
.

本发明有益的积极效果在于：The beneficial positive effect of the present invention is:

本发明能够自动化获取所述逆变系统的电路状态参数和运行数据参数；根据电路状态参数以及运行数据参数对变换电路的运行模式进行调整，其中运行模式控制变换逆变系统变换电路的功率MOSFRT关断状态；在具体实施例中，在获取逆变系统运行中的各种数据信息后，根据这些数据信息进行调节电路中的模式，比如采集到故障数据信息多，则可以考虑是否启动功率MOSFRT关断问题。通过故障诊断函数判断变换电路中故障数据信息，以切换或者调整逆变系统的运行状态，其中故障诊断函数通过转换公式实现变换电路中故障数据信息输出转换。The present invention can automatically obtain the circuit state parameters and operating data parameters of the inverter system; adjust the operating mode of the conversion circuit according to the circuit state parameters and operating data parameters, wherein the operating mode controls the power MOSFRT of the conversion inverter system conversion circuit to turn off In a specific embodiment, after obtaining various data information in the operation of the inverter system, adjust the mode in the circuit according to these data information, such as collecting a lot of fault data information, you can consider whether to start the power MOSFRT off problem. Judging the fault data information in the conversion circuit through the fault diagnosis function to switch or adjust the operating state of the inverter system, wherein the fault diagnosis function realizes the output conversion of the fault data information in the conversion circuit through the conversion formula.

附图说明Description of drawings

为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图，其中：In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, on the premise of not paying creative labor, other drawings can also be obtained according to these drawings, wherein:

图1为本发明中一种逆变系统控制方法流程示意图；Fig. 1 is a schematic flow chart of an inverter system control method in the present invention;

图2为本发明中一种逆变系统控制保护电路的原理示意图；Fig. 2 is a schematic diagram of the principle of an inverter system control and protection circuit in the present invention;

图3为本发明中故障信号采集模块电路原理示意图；Fig. 3 is a schematic diagram of fault signal acquisition module circuit principle in the present invention;

图4为本发明中变换电路原理示意图；Fig. 4 is the schematic diagram of conversion circuit principle in the present invention;

图5为本发明中功率MOSFRT电路原理示意图；Fig. 5 is a schematic diagram of the principle of the power MOSFRT circuit in the present invention;

图6为本发明中电压信号波形图。Fig. 6 is a voltage signal waveform diagram in the present invention.

具体实施方式Detailed ways

以下结合附图对本发明的优选实施例进行说明，应当理解，此处所描述的实施例仅用于说明和解释本发明，并不用于限定本发明。Preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

实施例（1）方法Embodiment (1) method

如图1所示，一种逆变系统控制方法，包括以下方法：As shown in Figure 1, a control method for an inverter system includes the following methods:

步骤一、获取所述逆变系统的电路状态参数和运行数据参数；采集到逆变系统电 路中输出的原始样本数据特征向量为

Figure 501706DEST_PATH_IMAGE001
，原始样本数据联合概率密度函数为
Figure 965048DEST_PATH_IMAGE002
，数据特征向量
Figure 591333DEST_PATH_IMAGE003
的
Figure 948365DEST_PATH_IMAGE004
阶累积通过累积量生成函数得到： Step 1. Obtain the circuit state parameters and operating data parameters of the inverter system; the original sample data eigenvectors collected and output in the inverter system circuit are
Figure 501706DEST_PATH_IMAGE001
, the joint probability density function of the original sample data is
Figure 965048DEST_PATH_IMAGE002
, the data eigenvector
Figure 591333DEST_PATH_IMAGE003
of
Figure 948365DEST_PATH_IMAGE004
The order cumulation is obtained by the cumulant generating function:

Figure 923274DEST_PATH_IMAGE005
（1）
Figure 923274DEST_PATH_IMAGE005
(1)

在公式（1）中，当

Figure 686962DEST_PATH_IMAGE006
时，得到
Figure 631784DEST_PATH_IMAGE007
阶矩和
Figure 328476DEST_PATH_IMAGE008
阶累积量，
Figure 5445DEST_PATH_IMAGE008
阶累积量通过
Figure 240117DEST_PATH_IMAGE009
阶矩计算得到，r表示常数，
Figure 67259DEST_PATH_IMAGE010
表示电路状态参数，
Figure 884036DEST_PATH_IMAGE011
表示运行数据参数，
Figure 341693DEST_PATH_IMAGE012
表示运行 数据参数数据集合； In formula (1), when
Figure 686962DEST_PATH_IMAGE006
when, get
Figure 631784DEST_PATH_IMAGE007
sum of moments
Figure 328476DEST_PATH_IMAGE008
step cumulant,
Figure 5445DEST_PATH_IMAGE008
order cumulant through
Figure 240117DEST_PATH_IMAGE009
The order moment is calculated, r represents a constant,
Figure 67259DEST_PATH_IMAGE010
Indicates the circuit state parameter,
Figure 884036DEST_PATH_IMAGE011
Indicates the operating data parameters,
Figure 341693DEST_PATH_IMAGE012
Indicates the running data parameter data set;

在具体实施例中，通过获取逆变系统的电路状态参数和运行数据参数进而获知逆变系统的数据信息状态，比如除了获取逆变系统运行中参数数据信息外，还获取周围环境等多种数据信息。In a specific embodiment, the data information status of the inverter system is obtained by obtaining the circuit state parameters and operating data parameters of the inverter system. For example, in addition to obtaining the parameter data information during the operation of the inverter system, various data such as the surrounding environment information.

步骤二、根据电路状态参数以及运行数据参数对变换电路的运行模式进行调整，其中运行模式控制变换逆变系统变换电路的功率MOSFRT关断状态；Step 2. Adjust the operation mode of the conversion circuit according to the circuit state parameters and the operation data parameters, wherein the operation mode controls the power MOSFRT off state of the conversion circuit of the conversion inverter system;

在具体实施例中，在获取逆变系统运行中的各种数据信息后，根据这些数据信息进行调节电路中的模式，比如采集到故障数据信息多，则可以考虑是否启动功率MOSFRT关断问题。In a specific embodiment, after obtaining various data information in the operation of the inverter system, the mode in the circuit is adjusted according to these data information, for example, if there is a lot of fault data information collected, the issue of whether to start power MOSFRT shutdown can be considered.

步骤三、通过故障诊断函数判断变换电路中故障数据信息，以切换或者调整逆变系统的运行状态，其中故障诊断函数通过转换公式实现变换电路中故障数据信息输出转换，其中：Step 3, judging the fault data information in the conversion circuit through the fault diagnosis function to switch or adjust the operating state of the inverter system, wherein the fault diagnosis function realizes the output conversion of the fault data information in the conversion circuit through a conversion formula, wherein:

转换公式为：The conversion formula is:

Figure 63662DEST_PATH_IMAGE071
（2）
Figure 63662DEST_PATH_IMAGE071
(2)

在公式（2）中，

Figure 22390DEST_PATH_IMAGE072
表示编码器输出值，
Figure 896937DEST_PATH_IMAGE015
表示故障信息，当
Figure 774763DEST_PATH_IMAGE016
大于1时，逆变 系统的运行状态记作为一种状态，当
Figure 921710DEST_PATH_IMAGE017
小于1时，逆变系统的运行状态记作为另一种状 态，运行状态的数据属性记作为符号集
Figure 243319DEST_PATH_IMAGE018
，
Figure 283956DEST_PATH_IMAGE019
为集合
Figure 286678DEST_PATH_IMAGE020
不相交的非空子集，
Figure 920922DEST_PATH_IMAGE021
为子 集的个数，对于电路故障信号的故障随机变量
Figure 283770DEST_PATH_IMAGE022
，三阶累积量推导函数为： In formula (2),
Figure 22390DEST_PATH_IMAGE072
Indicates the encoder output value,
Figure 896937DEST_PATH_IMAGE015
Indicates fault information, when
Figure 774763DEST_PATH_IMAGE016
When greater than 1, the running state of the inverter system is recorded as a state, when
Figure 921710DEST_PATH_IMAGE017
When it is less than 1, the running state of the inverter system is recorded as another state, and the data attribute of the running state is recorded as a symbol set
Figure 243319DEST_PATH_IMAGE018
,
Figure 283956DEST_PATH_IMAGE019
for collection
Figure 286678DEST_PATH_IMAGE020
disjoint non-empty subsets,
Figure 920922DEST_PATH_IMAGE021
is the number of subsets, for the fault random variable of the circuit fault signal
Figure 283770DEST_PATH_IMAGE022
, the third-order cumulant derivation function is:

Figure 929646DEST_PATH_IMAGE023
（3）
Figure 929646DEST_PATH_IMAGE023
(3)

在公式（3）中，In formula (3),

设定采集到故障电路的特征信号的离散时间序列为0。Set the discrete time series of the characteristic signal of the fault circuit collected to be 0.

在具体实施例中，通过引入编码器输出值，将影响各种数据信息的状态融合数据函数公式以提高电路故障数据信息的诊断和应用能力。In a specific embodiment, by introducing the output value of the encoder, the states that affect various data information are fused with the data function formula to improve the diagnosis and application capabilities of the circuit fault data information.

在上述实施例中，电路状态参数的获取方法为：In the above embodiments, the method for obtaining the circuit state parameters is as follows:

若接收到逆变系统控制启动指令，获取输入电压、输入电流、纹波数据信息、扰度数据信息以及实时直流母线电压的电路状态参数；通过输入电压计算得到最低直流母线电压的参考状态参数。If the inverter system control start command is received, the input voltage, input current, ripple data information, disturbance data information and circuit state parameters of the real-time DC bus voltage are obtained; the reference state parameters of the lowest DC bus voltage are obtained by calculating the input voltage.

在具体实施例中，数据信息不拘泥于上述数据信息。In a specific embodiment, the data information is not limited to the above-mentioned data information.

在上述实施例中，运行数据参数的获取方法为：In the above embodiment, the acquisition method of the running data parameters is as follows:

若接收到逆变系统控制启动指令，获取输入电压、输入电流、纹波数据信息、扰度数据信息以及实时直流母线电压的电路状态参数；通过输入电压计算得到最低直流母线电压的参考状态参数，以及电流、电压、容量、不同时间段下各个逆变器的发电量及辐照值。If the inverter system control start command is received, the input voltage, input current, ripple data information, disturbance data information and circuit state parameters of the real-time DC bus voltage are obtained; the reference state parameters of the lowest DC bus voltage are obtained by calculating the input voltage, And current, voltage, capacity, power generation and radiation value of each inverter in different time periods.

在具体实施例中，光伏电站逆变器系统运行状态中，其数据信息可以是多方面的，通过采集不同时间段下各个逆变器的发电量及辐照值能够衡量逆变器运行状态数据信息，监测系统将采集到的不同时间段下所有逆变器的发电量及辐照值在一定时间间隔下进行记录和计算，用户根据同一时间段下的发电总量与辐照总值判断逆变器系统是否正常运行；如果所述的逆变器系统运行正常，则结束并退出；如果所述的逆变器系统运行不正常，则用户点击第一图表中该逆变器系统运行不正常的时间段。因此对于数据信息的提取和计算，需要对输入电压、输入电流、纹波数据信息、扰度数据信息以及实时直流母线电压的电路状态参数；通过输入电压计算得到最低直流母线电压的参考状态参数进行采集和考虑。In a specific embodiment, in the operating state of the photovoltaic power station inverter system, its data information can be multi-faceted, and the inverter operating state data can be measured by collecting the power generation and radiation value of each inverter in different time periods information, the monitoring system records and calculates the collected power generation and radiation values of all inverters in different time periods at a certain time interval, and the user judges the inverter according to the total power generation and radiation values in the same time period. Whether the inverter system is running normally; if the inverter system is running normally, it will end and exit; if the inverter system is not running normally, the user clicks the inverter system is not running normally in the first chart time period. Therefore, for the extraction and calculation of data information, it is necessary to carry out the circuit state parameters of input voltage, input current, ripple data information, disturbance data information, and real-time DC bus voltage; the reference state parameters of the lowest DC bus voltage obtained through input voltage calculation collected and considered.

在上述实施例中，通过采集到的电路状态参数和运行数据参数调节变换电路的运行模式。In the above embodiments, the operation mode of the conversion circuit is adjusted through the collected circuit state parameters and operation data parameters.

在上述实施例中，故障诊断函数通过以下方法实现电路数据信息诊断：In the above-mentioned embodiment, the fault diagnosis function implements circuit data information diagnosis through the following methods:

当采样故障的特征信号

Figure 352537DEST_PATH_IMAGE024
为均值为0的平稳随机过程时，特征信号的
Figure 474077DEST_PATH_IMAGE073
阶累积量 函数表示为： When sampling the characteristic signal of a fault
Figure 352537DEST_PATH_IMAGE024
When it is a stationary random process with a mean value of 0, the characteristic signal
Figure 474077DEST_PATH_IMAGE073
The order cumulant function is expressed as:

Figure 125769DEST_PATH_IMAGE074
（4）
Figure 125769DEST_PATH_IMAGE074
(4)

在公式（4）中，特征信号的

Figure 875420DEST_PATH_IMAGE027
阶累积量与时间
Figure 406895DEST_PATH_IMAGE028
的变化无关，为滞后
Figure 563201DEST_PATH_IMAGE029
相关的函数， 特征信号
Figure 595748DEST_PATH_IMAGE030
为平稳数据信息，故障电路的采样信号为特征信号
Figure 153899DEST_PATH_IMAGE031
的
Figure 590697DEST_PATH_IMAGE027
阶矩和
Figure 749146DEST_PATH_IMAGE027
阶 累积量，取
Figure 539378DEST_PATH_IMAGE032
后的一个随机向量的
Figure 404566DEST_PATH_IMAGE027
阶矩和
Figure 340161DEST_PATH_IMAGE027
阶累积量，且仅有
Figure 533376DEST_PATH_IMAGE033
个独立元，则简 化得到的电路特征信号的三阶累积量函数表示为： In formula (4), the characteristic signal of
Figure 875420DEST_PATH_IMAGE027
Order cumulants and time
Figure 406895DEST_PATH_IMAGE028
The change has nothing to do with the hysteresis
Figure 563201DEST_PATH_IMAGE029
Correlation function, characteristic signal
Figure 595748DEST_PATH_IMAGE030
For stable data information, the sampling signal of the fault circuit is the characteristic signal
Figure 153899DEST_PATH_IMAGE031
of
Figure 590697DEST_PATH_IMAGE027
sum of moments
Figure 749146DEST_PATH_IMAGE027
order cumulant, take
Figure 539378DEST_PATH_IMAGE032
After a random vector of
Figure 404566DEST_PATH_IMAGE027
sum of moments
Figure 340161DEST_PATH_IMAGE027
order cumulant, and only
Figure 533376DEST_PATH_IMAGE033
Independent elements, then the third-order cumulant function of the simplified circuit characteristic signal is expressed as:

Figure 579830DEST_PATH_IMAGE034
（5）
Figure 579830DEST_PATH_IMAGE034
(5)

在公式（5）中，根据特征信号的

Figure 378153DEST_PATH_IMAGE027
阶矩和
Figure 156753DEST_PATH_IMAGE027
阶累积量可得到特征信号
Figure 86531DEST_PATH_IMAGE035
的峭度 和偏度，则
Figure 687408DEST_PATH_IMAGE036
，得到三阶累积量的1维切片表示偏度
Figure 261609DEST_PATH_IMAGE037
，令四阶累积量 的
Figure 539007DEST_PATH_IMAGE038
得到峭度
Figure 441235DEST_PATH_IMAGE039
，得到电路故障特征信号的峭度 和偏度均为无量纲的信号特征值，根据逆变系统参数变化对电路进行故障诊断； In formula (5), according to the characteristic signal of
Figure 378153DEST_PATH_IMAGE027
sum of moments
Figure 156753DEST_PATH_IMAGE027
The characteristic signal can be obtained by the order cumulant
Figure 86531DEST_PATH_IMAGE035
kurtosis and skewness, then
Figure 687408DEST_PATH_IMAGE036
, get a 1-dimensional slice of the third-order cumulant to represent the skewness
Figure 261609DEST_PATH_IMAGE037
, so that the fourth-order cumulant
Figure 539007DEST_PATH_IMAGE038
get kurtosis
Figure 441235DEST_PATH_IMAGE039
, the kurtosis and skewness of the circuit fault characteristic signal are both dimensionless signal characteristic values, and the fault diagnosis of the circuit is carried out according to the parameter change of the inverter system;

通过偏度

Figure 95070DEST_PATH_IMAGE040
判断逆变系统电路信号的概率分布是否对称，峭度
Figure 523777DEST_PATH_IMAGE041
反映逆变系统 输出信号概率分布的陡峭程度，信号中均值为
Figure 722808DEST_PATH_IMAGE042
、方差为
Figure 361600DEST_PATH_IMAGE043
的高斯随机变量的
Figure 491230DEST_PATH_IMAGE044
阶累积量
Figure 853073DEST_PATH_IMAGE045
。 by skewness
Figure 95070DEST_PATH_IMAGE040
Judging whether the probability distribution of the inverter system circuit signal is symmetrical, kurtosis
Figure 523777DEST_PATH_IMAGE041
Reflects the steepness of the probability distribution of the output signal of the inverter system, and the average value of the signal is
Figure 722808DEST_PATH_IMAGE042
, the variance is
Figure 361600DEST_PATH_IMAGE043
Gaussian random variable of
Figure 491230DEST_PATH_IMAGE044
order cumulant
Figure 853073DEST_PATH_IMAGE045
.

通过上述函数，故障诊断函数能够完全抑制高斯噪声的影响，过滤掉采集信号中的高斯分量，但保持高阶矩并不全为0。通过将电路中的数据信息状态转换，提高数据保护能力。Through the above function, the fault diagnosis function can completely suppress the influence of Gaussian noise, filter out the Gaussian component in the collected signal, but keep the high-order moments not all 0. By converting the state of data information in the circuit, the data protection capability is improved.

实施例（2）电路Example (2) circuit

如图2所示，一种逆变系统控制保护电路，包括逆变系统，其中所述保护电路包括：As shown in Figure 2, an inverter system control and protection circuit includes an inverter system, wherein the protection circuit includes:

如图3所示，故障信号采集模块电路，用于采集逆变系统运行过程中的故障数据信息；As shown in Figure 3, the fault signal acquisition module circuit is used to collect fault data information during the operation of the inverter system;

如图4所示，变换电路，用于变换采集逆变系统运行过程中的故障数据信息；As shown in Figure 4, the transformation circuit is used to transform and collect fault data information during the operation of the inverter system;

如图5所示，功率MOSFRT电路，用于控制变换电路实现数据信息的变换；As shown in Figure 5, the power MOSFRT circuit is used to control the transformation circuit to realize the transformation of data information;

其中逆变系统的输出端与故障信号采集模块电路的输入端连接，故障信号采集模块电路的输出端与变换电路的输入端连接，所述变换电路的输出端与功率MOSFRT电路的输入端连接，所述功率MOSFRT电路的输出端与逆变系统的输入端连接。Wherein the output end of the inverter system is connected with the input end of the fault signal acquisition module circuit, the output end of the fault signal acquisition module circuit is connected with the input end of the conversion circuit, and the output end of the conversion circuit is connected with the input end of the power MOSFRT circuit, The output terminal of the power MOSFRT circuit is connected with the input terminal of the inverter system.

在上述实施例中，所述故障信号采集模块电路包括STM32F407VET6芯片的嵌入式控制器与所述STM32F407VET6芯片的嵌入式控制器连接的LM358DR2G芯片电路和电阻电路。In the above embodiment, the fault signal acquisition module circuit includes an embedded controller of the STM32F407VET6 chip and an LM358DR2G chip circuit and a resistor circuit connected to the embedded controller of the STM32F407VET6 chip.

在上述实施例中，根据系统的故障诊断的需要，系统通过软件控制硬件的信号发生和数据采集等，故障诊断设备的主控单元使用STM32F407VET6芯片的嵌入式控制器，通过PA11、PA12与上位机相连，实现与上位机之间的通信。故障信号采集模块需要同时对待诊断电路的输入和输出同时进行采集，为获取更多的采样信号，采集模块选用具有8路通道采集的模数转换芯片，采集故障电路的输出信号。采集模块电路使用AD7606芯片进行采集数据，模块采用5V单电源供电，内部集成有8路同步数据采集和并行接口，采集通道都能以200Ksps的速率进行采样。数据采集通道中由LM358DR2G构成电压跟随器，用来提高输入阻抗并起到电路隔离作用，减少电路干扰并提高采样精度。模块芯片内部集成了低噪声的信号调理电路，外部安装有保护电路，使采集daunt能够承受较大的瞬时电压。In the above-mentioned embodiment, according to the needs of the fault diagnosis of the system, the system controls the signal generation and data acquisition of the hardware through software, and the main control unit of the fault diagnosis equipment uses the embedded controller of the STM32F407VET6 chip. Connected to realize the communication with the host computer. The fault signal acquisition module needs to collect the input and output of the circuit to be diagnosed at the same time. In order to obtain more sampling signals, the acquisition module selects an analog-to-digital conversion chip with 8-channel acquisition to collect the output signal of the fault circuit. The acquisition module circuit uses the AD7606 chip to collect data. The module is powered by a 5V single power supply. It integrates 8 channels of synchronous data acquisition and parallel interfaces. The acquisition channels can be sampled at a rate of 200Ksps. In the data acquisition channel, LM358DR2G constitutes a voltage follower, which is used to increase the input impedance and play a role of circuit isolation, reduce circuit interference and improve sampling accuracy. The module chip integrates a low-noise signal conditioning circuit inside, and a protection circuit is installed outside, so that the acquisition daunt can withstand a large instantaneous voltage.

在上述实施例中，变换电路包括嵌入式控制器与所述嵌入式控制器连接的主电路 功率二极管、电容

Figure 534590DEST_PATH_IMAGE046
、
Figure 349093DEST_PATH_IMAGE047
、电感
Figure 16835DEST_PATH_IMAGE048
、
Figure 482451DEST_PATH_IMAGE049
和电阻电路，其中控制电路的直流输入电压为28V， 负载电阻为
Figure 351181DEST_PATH_IMAGE050
，其中所述嵌入式控制器还连接有电源电路和LM317单片线性的电源电压 调节器，其中LM317单片线性的电源电压调节器使变换电路的输出电压范围介乎1.2~37V， 电源电压调节器的电压调节范围为： In the above embodiment, the conversion circuit includes the embedded controller and the main circuit power diode and capacitor connected to the embedded controller
Figure 534590DEST_PATH_IMAGE046
,
Figure 349093DEST_PATH_IMAGE047
,inductance
Figure 16835DEST_PATH_IMAGE048
,
Figure 482451DEST_PATH_IMAGE049
and resistance circuit, where the DC input voltage of the control circuit is 28V, and the load resistance is
Figure 351181DEST_PATH_IMAGE050
, wherein the embedded controller is also connected with a power supply circuit and a LM317 single-chip linear power supply voltage regulator, wherein the LM317 single-chip linear power supply voltage regulator makes the output voltage range of the conversion circuit between 1.2~37V, and the power supply voltage is adjusted The regulator voltage regulation range is:

Figure 636669DEST_PATH_IMAGE051
（6）
Figure 636669DEST_PATH_IMAGE051
(6)

在公式（6）中，其中

Figure 108102DEST_PATH_IMAGE052
表示调节端电流，
Figure 241274DEST_PATH_IMAGE053
表示调节端对地电阻，
Figure 202277DEST_PATH_IMAGE054
表示调节端 与输出端之间的电阻，变换电路中的主要测点为
Figure 912744DEST_PATH_IMAGE055
、
Figure 254777DEST_PATH_IMAGE056
、
Figure 226144DEST_PATH_IMAGE057
、
Figure 561310DEST_PATH_IMAGE058
、
Figure 572123DEST_PATH_IMAGE059
、
Figure 775571DEST_PATH_IMAGE060
、
Figure 821019DEST_PATH_IMAGE061
、
Figure 61507DEST_PATH_IMAGE062
、
Figure 74462DEST_PATH_IMAGE063
和
Figure 301176DEST_PATH_IMAGE064
。 In formula (6), where
Figure 108102DEST_PATH_IMAGE052
Indicates the adjustment terminal current,
Figure 241274DEST_PATH_IMAGE053
Indicates the resistance of the adjustment terminal to ground,
Figure 202277DEST_PATH_IMAGE054
Indicates the resistance between the adjustment terminal and the output terminal, and the main measuring point in the conversion circuit is
Figure 912744DEST_PATH_IMAGE055
,
Figure 254777DEST_PATH_IMAGE056
,
Figure 226144DEST_PATH_IMAGE057
,
Figure 561310DEST_PATH_IMAGE058
,
Figure 572123DEST_PATH_IMAGE059
,
Figure 775571DEST_PATH_IMAGE060
,
Figure 821019DEST_PATH_IMAGE061
,
Figure 61507DEST_PATH_IMAGE062
,
Figure 74462DEST_PATH_IMAGE063
and
Figure 301176DEST_PATH_IMAGE064
.

在上述实施例中，变换电路还设置有Sepic斩波变换器，使电路在连续导通模式下限制启动电流和冲击电流。In the above embodiments, the conversion circuit is further provided with a Sepic chopper converter, so that the circuit limits the start-up current and the inrush current in the continuous conduction mode.

在上述实施例中，功率MOSFRT电路导通状态下变换器产生三个回路，将电源、电感

Figure 388080DEST_PATH_IMAGE065
和功率MOSFET构成第一回路，此时经过
Figure 861787DEST_PATH_IMAGE065
的电流在电源电压作用下线性增长，第二回路 包括电容
Figure 909509DEST_PATH_IMAGE066
、功率MOSFET和电感
Figure 392442DEST_PATH_IMAGE067
，此时电感的电流在电容
Figure 333854DEST_PATH_IMAGE066
放电的影响下增加，第三回 路通过电容
Figure 791511DEST_PATH_IMAGE068
向主电路的负债供电，根据
Figure 779059DEST_PATH_IMAGE069
，电容
Figure 550837DEST_PATH_IMAGE068
上的电压下降，
Figure 346754DEST_PATH_IMAGE068
的 值大于10 000μF时，
Figure 490160DEST_PATH_IMAGE070
。 In the above-mentioned embodiment, the converter generates three loops when the power MOSFRT circuit is turned on, and the power supply, inductor
Figure 388080DEST_PATH_IMAGE065
and the power MOSFET constitute the first loop, at this time through
Figure 861787DEST_PATH_IMAGE065
The current increases linearly under the action of the power supply voltage, and the second loop includes a capacitor
Figure 909509DEST_PATH_IMAGE066
, power MOSFET and inductor
Figure 392442DEST_PATH_IMAGE067
, at this time the current in the inductor is in the capacitor
Figure 333854DEST_PATH_IMAGE066
increase under the influence of the discharge, the third loop through the capacitor
Figure 791511DEST_PATH_IMAGE068
supply to the liabilities of the main circuit, according to
Figure 779059DEST_PATH_IMAGE069
,capacitance
Figure 550837DEST_PATH_IMAGE068
voltage drop on the
Figure 346754DEST_PATH_IMAGE068
values greater than 10 000µF, the
Figure 490160DEST_PATH_IMAGE070
.

在具体实施例中，测点

Figure 184577DEST_PATH_IMAGE055
、
Figure 946997DEST_PATH_IMAGE056
、
Figure 925317DEST_PATH_IMAGE057
、
Figure 990356DEST_PATH_IMAGE058
电压信号的峰值和峰峰值能够 反映电路的硬故障类型，进行故障诊断时选用故障特征参数为峰值
Figure 686917DEST_PATH_IMAGE075
，峰峰值
Figure 987448DEST_PATH_IMAGE076
。 选用故障特征参数为功率MOSFET断开期间的峰值
Figure 367745DEST_PATH_IMAGE077
、
Figure 790636DEST_PATH_IMAGE078
，峰峰 值
Figure 646597DEST_PATH_IMAGE079
和
Figure 563868DEST_PATH_IMAGE080
，功率MOSFET导通期间的峰值
Figure 579098DEST_PATH_IMAGE081
、
Figure 923622DEST_PATH_IMAGE082
，测点
Figure 266879DEST_PATH_IMAGE083
电压信号的峰值，测点
Figure 768268DEST_PATH_IMAGE084
电压信号的峰值
Figure 591998DEST_PATH_IMAGE085
作为软故障 特征参数。 In a specific embodiment, the measuring point
Figure 184577DEST_PATH_IMAGE055
,
Figure 946997DEST_PATH_IMAGE056
,
Figure 925317DEST_PATH_IMAGE057
,
Figure 990356DEST_PATH_IMAGE058
The peak value and peak value of the voltage signal can reflect the hard fault type of the circuit, and the fault characteristic parameter is selected as the peak value when performing fault diagnosis.
Figure 686917DEST_PATH_IMAGE075
, peak-to-peak
Figure 987448DEST_PATH_IMAGE076
. The fault characteristic parameter is selected as the peak value during the disconnection period of the power MOSFET
Figure 367745DEST_PATH_IMAGE077
,
Figure 790636DEST_PATH_IMAGE078
, peak-to-peak
Figure 646597DEST_PATH_IMAGE079
and
Figure 563868DEST_PATH_IMAGE080
, the peak value of the power MOSFET on-time
Figure 579098DEST_PATH_IMAGE081
,
Figure 923622DEST_PATH_IMAGE082
,Measuring point
Figure 266879DEST_PATH_IMAGE083
Peak value of voltage signal, measuring point
Figure 768268DEST_PATH_IMAGE084
The peak value of the voltage signal
Figure 591998DEST_PATH_IMAGE085
as a soft fault characteristic parameter.

控制电路中使用UC3843A芯片，本发明在二次电源电路中加入LM317单片线性的电源电压调节器，输出电压范围咋一定范围内调整。 在上述实施例中，变换电路的输入端连接有故障信号采集模块，所述故障信号采集模块包括STM32F407VET6芯片的嵌入式控制器与所述STM32F407VET6芯片的嵌入式控制器连接的LM358DR2G芯片电路和电阻电路。The UC3843A chip is used in the control circuit, and the present invention adds an LM317 single-chip linear power supply voltage regulator to the secondary power supply circuit, and the output voltage range can be adjusted within a certain range. In the above embodiment, the input end of the conversion circuit is connected with a fault signal acquisition module, and the fault signal acquisition module includes an LM358DR2G chip circuit and a resistor circuit connected to the embedded controller of the STM32F407VET6 chip and the embedded controller of the STM32F407VET6 chip .

实施（3）验证Implement (3) Validation

如图6所示，为了验证上述技术效果，本发明使用QT Creator 4.11.0开发工具进行系统模块化编程，系统客户端主要完成对终端设备采集到的数据进行分析计算，将计算和诊断结果显示到系统交互界面。系统界面主要包括对激励信号的参数设置，对故障特征提取的控制和输入输出的波形显示等功能。As shown in Figure 6, in order to verify the above technical effects, the present invention uses the QT Creator 4.11.0 development tool for system modular programming, the system client mainly completes the analysis and calculation of the data collected by the terminal equipment, and displays the calculation and diagnosis results to the system interface. The system interface mainly includes the parameter setting of the excitation signal, the control of the fault feature extraction and the input and output waveform display and other functions.

实验环境硬件电路中电容

Figure 356692DEST_PATH_IMAGE066
选择50V/220
Figure 921665DEST_PATH_IMAGE086
的电解电容，电容
Figure 243057DEST_PATH_IMAGE068
选择25V/220
Figure 436140DEST_PATH_IMAGE086
的电解电容，电感
Figure 43839DEST_PATH_IMAGE065
、
Figure 909158DEST_PATH_IMAGE067
均使用3A/470
Figure 283508DEST_PATH_IMAGE087
，功率MOSFET型号为IRF540，功率二极管 型号为MBR3045，负载选用10W/10
Figure 816251DEST_PATH_IMAGE088
的大功率电阻。 Capacitance in the hardware circuit of the experimental environment
Figure 356692DEST_PATH_IMAGE066
Choose 50V/220
Figure 921665DEST_PATH_IMAGE086
electrolytic capacitors, capacitors
Figure 243057DEST_PATH_IMAGE068
Choose 25V/220
Figure 436140DEST_PATH_IMAGE086
electrolytic capacitors, inductors
Figure 43839DEST_PATH_IMAGE065
,
Figure 909158DEST_PATH_IMAGE067
Both use 3A/470
Figure 283508DEST_PATH_IMAGE087
, the power MOSFET model is IRF540, the power diode model is MBR3045, and the load is 10W/10
Figure 816251DEST_PATH_IMAGE088
high power resistors.

在标准工作状况下，使用数据采集模块对电路正常工作时测点

Figure 594852DEST_PATH_IMAGE089
、
Figure 259051DEST_PATH_IMAGE090
、
Figure 871647DEST_PATH_IMAGE091
、
Figure 445847DEST_PATH_IMAGE092
的电压信号进行采集，输出信号波形如图6所示。通过去除电路元件来模拟电路 中出现的运行数据参数故障，通过公式计算故障诊断率： Under standard working conditions, use the data acquisition module to measure points when the circuit is working normally
Figure 594852DEST_PATH_IMAGE089
,
Figure 259051DEST_PATH_IMAGE090
,
Figure 871647DEST_PATH_IMAGE091
,
Figure 445847DEST_PATH_IMAGE092
The voltage signal is collected, and the output signal waveform is shown in Figure 6. By removing the circuit components to simulate the operation data parameter faults in the circuit, the fault diagnosis rate is calculated by the formula:

Figure 723245DEST_PATH_IMAGE093
（6）
Figure 723245DEST_PATH_IMAGE093
(6)

在公式（6）中，其中N表示电路的工作模式数，

Figure 891052DEST_PATH_IMAGE095
表示某个电路的工作模式，
Figure 951412DEST_PATH_IMAGE097
表示所有电路工作模式中正确诊断的样本总数。使用三种系统诊断实验电路中的故障诊断，其中方案1为NPC三电平逆变器混杂建模及开路故障诊断技术，方案2为基于量子粒子群算法-支持向量机的冷连轧断带故障诊断技术，通过这两种方法与本发明的方法进行对比分析，计算得到三种系统的运行数据参数故障诊断率如表1所示。In formula (6), where N represents the number of operating modes of the circuit,
Figure 891052DEST_PATH_IMAGE095
Indicates the working mode of a certain circuit,
Figure 951412DEST_PATH_IMAGE097
Indicates the total number of correctly diagnosed samples in all modes of circuit operation. The fault diagnosis in the experimental circuit of three kinds of system diagnosis is used, among which the scheme 1 is NPC three-level inverter hybrid modeling and open-circuit fault diagnosis technology, and the scheme 2 is based on the quantum particle swarm algorithm-support vector machine for cold rolling strip break Fault diagnosis technology, by comparing and analyzing these two methods with the method of the present invention, the fault diagnosis rates of operating data parameters of the three systems are calculated as shown in Table 1.

表1 三种系统的运行数据参数故障诊断率Table 1 Fault diagnosis rate of operating data parameters of three systems

Figure 708016DEST_PATH_IMAGE098
Figure 708016DEST_PATH_IMAGE098

根据计算得到的故障诊断率可知，本发明方法的故障诊断方法对电子电路中出现 的运行数据参数故障的诊断率最高，故障检测效果最好。对出现的运行数据参数故障功率 MOSFET开路、二极管DIODE开路、电容

Figure 969364DEST_PATH_IMAGE066
短路、电容
Figure 545839DEST_PATH_IMAGE068
开路和电感
Figure 675469DEST_PATH_IMAGE065
开路情况，故障诊断率 为100%。 According to the calculated fault diagnosis rate, it can be seen that the fault diagnosis method of the method of the present invention has the highest diagnosis rate for operating data parameter faults in the electronic circuit, and the fault detection effect is the best. Faulty power MOSFET open circuit, diode DIODE open circuit, capacitor
Figure 969364DEST_PATH_IMAGE066
short circuit, capacitance
Figure 545839DEST_PATH_IMAGE068
Open circuit and inductance
Figure 675469DEST_PATH_IMAGE065
In case of open circuit, the fault diagnosis rate is 100%.

方案1方法对电路中出现运行数据参数故障的平均故障诊断率为94%，对运行数据 参数故障中二极管DIODE开路情况的故障诊断率达到100%。方案2方法对运行数据参数故障 的平均故障诊断率为97.6%，其中对电路中出现电感

Figure 37311DEST_PATH_IMAGE065
开路情况的诊断率高达100% Scheme 1 method has an average fault diagnosis rate of 94% for operating data parameter faults in the circuit, and a fault diagnosis rate of 100% for the open circuit of diode DIODE in operating data parameter faults. The average fault diagnosis rate of the operation data parameter fault of the scheme 2 method is 97.6%, among which the inductance in the circuit
Figure 37311DEST_PATH_IMAGE065
100% diagnostics for open circuit conditions

通过替换元器件及串并联电阻来模拟电路状态参数区间的某些取值，使用三种系统诊断实验电路中的电路状态参数，经过计算得到三种系统的电路状态参数诊断率如表2所示。By replacing components and series-parallel resistors to simulate some values of the circuit state parameter range, using the circuit state parameters in the three system diagnostic test circuits, the diagnosis rates of the circuit state parameters of the three systems are calculated as shown in Table 2 .

表2 三种系统的电路状态参数诊断率Table 2 Diagnosis rate of circuit state parameters of three systems

Figure 453249DEST_PATH_IMAGE099
Figure 453249DEST_PATH_IMAGE099

本发明对于电路状态参数中电容

Figure 454703DEST_PATH_IMAGE066
电容值减小20~50%的情况，故障诊断率最大达 到100%。当功率MOSFET导通阻抗增大20~50%时，故障诊断率低至93%。方案1方法对电容
Figure 201073DEST_PATH_IMAGE100
开路的故障诊断率低至90%。当出现电容
Figure 729006DEST_PATH_IMAGE101
电容值减小20~50%，等效阻抗增大25~100%电路 状态参数时，方案1的故障诊断率仅为88%，功率MOSFET导通阻抗增大时的故障诊断率低至 80%。说明方案1方法对电路出现电路状态参数的诊断效果不好。方案2方法对电路状态参数 的平均故障诊断率为91.2%。对出现电感
Figure 269840DEST_PATH_IMAGE065
开路和电容
Figure 758591DEST_PATH_IMAGE066
电容值减小50~80%的情况诊断率 高达100%。但受到电路中其他谐波信号的影响，对电路状态参数
Figure 557919DEST_PATH_IMAGE102
和
Figure 691091DEST_PATH_IMAGE103
的故障诊断率低 于90%。 In the present invention, for the capacitor in the circuit state parameter
Figure 454703DEST_PATH_IMAGE066
When the capacitance value is reduced by 20~50%, the fault diagnosis rate can reach up to 100%. When the conduction resistance of power MOSFET increases by 20~50%, the fault diagnosis rate is as low as 93%. Option 1 method for capacitive
Figure 201073DEST_PATH_IMAGE100
The open circuit fault diagnosis rate is as low as 90%. When the capacitance
Figure 729006DEST_PATH_IMAGE101
When the capacitance value is reduced by 20~50% and the equivalent impedance is increased by 25~100% of the circuit state parameters, the fault diagnosis rate of Scheme 1 is only 88%, and the fault diagnosis rate is as low as 80% when the power MOSFET on-resistance increases . It shows that the method of scheme 1 is not effective in diagnosing the circuit state parameters in the circuit. The average fault diagnosis rate of circuit state parameters by scheme 2 is 91.2%. Appearing inductance
Figure 269840DEST_PATH_IMAGE065
Open Circuit and Capacitance
Figure 758591DEST_PATH_IMAGE066
The diagnosis rate is as high as 100% when the capacitance value is reduced by 50~80%. However, affected by other harmonic signals in the circuit, the circuit state parameters
Figure 557919DEST_PATH_IMAGE102
and
Figure 691091DEST_PATH_IMAGE103
The fault diagnosis rate is less than 90%.

虽然以上描述了本发明的具体实施方式，但是本领域的技术人员应当理解，这些具体实施方式仅是举例说明，本领域的技术人员在不脱离本发明的原理和实质的情况下，可以对上述方法和钛合金设备的细节进行各种省略、替换和改变。例如，合并上述方法步骤，从而按照实质相同的方法执行实质相同的功能以实现实质相同的结果则属于本发明的范围。因此，本发明的范围仅由所附权利要求书限定。Although the specific embodiments of the present invention have been described above, those skilled in the art should understand that these specific embodiments are only for illustration, and those skilled in the art can make the above-mentioned Various omissions, substitutions and changes have been made in the details of the methods and titanium alloy apparatus. For example, it is within the scope of the present invention to combine the above method steps so as to perform substantially the same function in substantially the same way to achieve substantially the same result. Accordingly, the scope of the invention is limited only by the appended claims.

Claims (9)

1.一种逆变系统控制方法，其特征在于：包括以下步骤：1. A method for controlling an inverter system, characterized in that: comprising the following steps: 步骤一、获取所述逆变系统的电路状态参数和运行数据参数；采集到逆变系统电路中 输出的原始样本数据特征向量为
Figure 214489DEST_PATH_IMAGE001
，原始样本数据联合概率密度函数为
Figure 459526DEST_PATH_IMAGE002
，原始样本数据特征向量
Figure 786733DEST_PATH_IMAGE003
的
Figure 588467DEST_PATH_IMAGE004
阶累积通过累积量生成函数得到： Step 1. Obtain the circuit state parameters and operating data parameters of the inverter system; the original sample data eigenvectors collected and output in the inverter system circuit are
Figure 214489DEST_PATH_IMAGE001
, the joint probability density function of the original sample data is
Figure 459526DEST_PATH_IMAGE002
, the original sample data feature vector
Figure 786733DEST_PATH_IMAGE003
of
Figure 588467DEST_PATH_IMAGE004
The order cumulation is obtained by the cumulant generating function:
Figure 478538DEST_PATH_IMAGE005
（1）
Figure 478538DEST_PATH_IMAGE005
(1) 在公式（1）中，当
Figure 363317DEST_PATH_IMAGE006
时，得到
Figure 895930DEST_PATH_IMAGE007
阶矩和
Figure 376721DEST_PATH_IMAGE008
阶累积量，
Figure 107917DEST_PATH_IMAGE008
阶累积量通过
Figure 914330DEST_PATH_IMAGE009
阶矩 计算得到，r表示常数，
Figure 199817DEST_PATH_IMAGE010
表示电路状态参数，
Figure 264725DEST_PATH_IMAGE011
表示运行数据参数，
Figure 804422DEST_PATH_IMAGE012
表示运行数据参 数数据集合； In formula (1), when
Figure 363317DEST_PATH_IMAGE006
when, get
Figure 895930DEST_PATH_IMAGE007
sum of moments
Figure 376721DEST_PATH_IMAGE008
step cumulant,
Figure 107917DEST_PATH_IMAGE008
order cumulant through
Figure 914330DEST_PATH_IMAGE009
The order moment is calculated, r represents a constant,
Figure 199817DEST_PATH_IMAGE010
Indicates the circuit state parameter,
Figure 264725DEST_PATH_IMAGE011
Indicates the operating data parameters,
Figure 804422DEST_PATH_IMAGE012
Indicates the running data parameter data set; 步骤二、根据电路状态参数以及运行数据参数对变换电路的运行模式进行调整，其中运行模式控制变换逆变系统的变换电路的功率MOSFET关断状态；Step 2, adjusting the operation mode of the conversion circuit according to the circuit state parameter and the operation data parameter, wherein the operation mode controls the power MOSFET off state of the conversion circuit of the conversion inverter system; 步骤三、通过故障诊断函数判断变换电路中故障数据信息，以切换或者调整逆变系统的运行状态，其中故障诊断函数通过k阶累累积量实现变换电路中故障数据信息输出转换，其中：Step 3, judging the fault data information in the conversion circuit through the fault diagnosis function, so as to switch or adjust the operating state of the inverter system, wherein the fault diagnosis function realizes the output conversion of the fault data information in the conversion circuit through the k-order cumulative accumulation, wherein: 转换公式为：The conversion formula is:
Figure 562163DEST_PATH_IMAGE013
（2）
Figure 562163DEST_PATH_IMAGE013
(2) 在公式（2）中，
Figure 69367DEST_PATH_IMAGE014
表示编码器输出值，
Figure 154611DEST_PATH_IMAGE015
表示故障信息，当
Figure 125978DEST_PATH_IMAGE016
大于1时，逆变系统 的运行状态记作为一种状态，当
Figure 477456DEST_PATH_IMAGE017
小于1时，逆变系统的运行状态记作为另一种状态，运 行状态的数据属性记作为符号集
Figure 534273DEST_PATH_IMAGE018
，
Figure 878667DEST_PATH_IMAGE019
为集合
Figure 455273DEST_PATH_IMAGE020
不相交的非空子集，
Figure 289237DEST_PATH_IMAGE021
为子集的个 数，对于电路故障信号的故障随机变量
Figure 256187DEST_PATH_IMAGE022
，三阶累积量推导函数为： In formula (2),
Figure 69367DEST_PATH_IMAGE014
Indicates the encoder output value,
Figure 154611DEST_PATH_IMAGE015
Indicates fault information, when
Figure 125978DEST_PATH_IMAGE016
When greater than 1, the running state of the inverter system is recorded as a state, when
Figure 477456DEST_PATH_IMAGE017
When it is less than 1, the running state of the inverter system is recorded as another state, and the data attribute of the running state is recorded as a symbol set
Figure 534273DEST_PATH_IMAGE018
,
Figure 878667DEST_PATH_IMAGE019
for collection
Figure 455273DEST_PATH_IMAGE020
disjoint non-empty subsets,
Figure 289237DEST_PATH_IMAGE021
is the number of subsets, for the fault random variable of the circuit fault signal
Figure 256187DEST_PATH_IMAGE022
, the third-order cumulant derivation function is:
Figure 466588DEST_PATH_IMAGE023
（3）
Figure 466588DEST_PATH_IMAGE023
(3) 在公式（3）中，设定采集到故障电路的特征信号的离散时间序列为0。In formula (3), the discrete time series of the characteristic signal of the fault circuit collected is set to 0. 2.根据权利要求1所述的一种逆变系统控制方法，其特征在于：电路状态参数的获取方法为：2. A kind of inverter system control method according to claim 1, is characterized in that: the acquisition method of circuit state parameter is: 若接收到逆变系统控制启动指令，获取输入电压、输入电流、纹波数据信息、扰度数据信息以及实时直流母线电压的电路状态参数；通过输入电压计算得到最低直流母线电压的参考状态参数。If the inverter system control start command is received, the input voltage, input current, ripple data information, disturbance data information and circuit state parameters of the real-time DC bus voltage are obtained; the reference state parameters of the lowest DC bus voltage are obtained by calculating the input voltage. 3.根据权利要求1所述的一种逆变系统控制方法，其特征在于：运行数据参数的获取方法为：3. A kind of inverter system control method according to claim 1, is characterized in that: the acquisition method of operating data parameter is: 若接收到逆变系统控制启动指令，获取输入电压、输入电流、纹波数据信息、扰度数据信息以及实时直流母线电压的电路状态参数；通过输入电压计算得到最低直流母线电压的参考状态参数，以及电流、电压、容量、不同时间段下各个逆变器的发电量及辐照值。If the inverter system control start command is received, the input voltage, input current, ripple data information, disturbance data information and circuit state parameters of the real-time DC bus voltage are obtained; the reference state parameters of the lowest DC bus voltage are obtained by calculating the input voltage, And current, voltage, capacity, power generation and radiation value of each inverter in different time periods. 4.根据权利要求1所述的一种逆变系统控制方法，其特征在于：故障诊断函数通过以下方法实现电路数据信息诊断：4. A kind of inverter system control method according to claim 1, is characterized in that: fault diagnosis function realizes circuit data information diagnosis by following method: 当采样故障的特征信号
Figure 350231DEST_PATH_IMAGE024
为均值为0的平稳随机过程时，特征信号的
Figure 102899DEST_PATH_IMAGE025
阶累积量函数 表示为： When sampling the characteristic signal of a fault
Figure 350231DEST_PATH_IMAGE024
When it is a stationary random process with a mean value of 0, the characteristic signal
Figure 102899DEST_PATH_IMAGE025
The order cumulant function is expressed as:
Figure 806413DEST_PATH_IMAGE026
（4）
Figure 806413DEST_PATH_IMAGE026
(4) 在公式（4）中，特征信号的
Figure 758188DEST_PATH_IMAGE027
阶累积量与时间
Figure 309386DEST_PATH_IMAGE028
的变化无关，为滞后
Figure 953994DEST_PATH_IMAGE029
相关的函数，特征 信号
Figure 144804DEST_PATH_IMAGE030
为平稳数据信息，故障电路的采样信号为特征信号
Figure 447741DEST_PATH_IMAGE031
的
Figure 571554DEST_PATH_IMAGE027
阶矩和
Figure 668954DEST_PATH_IMAGE027
阶累积量， 取
Figure 612640DEST_PATH_IMAGE032
后的一个随机向量的
Figure 906218DEST_PATH_IMAGE027
阶矩和
Figure 390199DEST_PATH_IMAGE027
阶累积量，且仅有
Figure 907768DEST_PATH_IMAGE033
个独立元，则简化得到的 电路特征信号的三阶累积量函数表示为： In formula (4), the characteristic signal of
Figure 758188DEST_PATH_IMAGE027
Order cumulants and time
Figure 309386DEST_PATH_IMAGE028
The change has nothing to do with the hysteresis
Figure 953994DEST_PATH_IMAGE029
Correlation function, characteristic signal
Figure 144804DEST_PATH_IMAGE030
For stable data information, the sampling signal of the fault circuit is the characteristic signal
Figure 447741DEST_PATH_IMAGE031
of
Figure 571554DEST_PATH_IMAGE027
sum of moments
Figure 668954DEST_PATH_IMAGE027
order cumulant, take
Figure 612640DEST_PATH_IMAGE032
After a random vector of
Figure 906218DEST_PATH_IMAGE027
sum of moments
Figure 390199DEST_PATH_IMAGE027
order cumulant, and only
Figure 907768DEST_PATH_IMAGE033
Independent elements, then the third-order cumulant function of the simplified circuit characteristic signal is expressed as:
Figure 73170DEST_PATH_IMAGE034
（5）
Figure 73170DEST_PATH_IMAGE034
(5) 在公式（5）中，根据特征信号的
Figure 717909DEST_PATH_IMAGE027
阶矩和
Figure 285157DEST_PATH_IMAGE027
阶累积量可得到特征信号
Figure 176890DEST_PATH_IMAGE035
的峭度和偏 度，则
Figure 845899DEST_PATH_IMAGE036
，得到三阶累积量的1维切片表示偏度
Figure 543597DEST_PATH_IMAGE037
，令四阶累积量的
Figure 965351DEST_PATH_IMAGE038
得到峭度
Figure 44297DEST_PATH_IMAGE039
，得到电路故障特征信号的峭度和偏 度均为无量纲的信号特征值，根据逆变系统参数变化对电路进行故障诊断； In formula (5), according to the characteristic signal of
Figure 717909DEST_PATH_IMAGE027
sum of moments
Figure 285157DEST_PATH_IMAGE027
The characteristic signal can be obtained by the order cumulant
Figure 176890DEST_PATH_IMAGE035
kurtosis and skewness, then
Figure 845899DEST_PATH_IMAGE036
, get a 1-dimensional slice of the third-order cumulant to represent the skewness
Figure 543597DEST_PATH_IMAGE037
, so that the fourth-order cumulant
Figure 965351DEST_PATH_IMAGE038
get kurtosis
Figure 44297DEST_PATH_IMAGE039
, the kurtosis and skewness of the circuit fault characteristic signal are both dimensionless signal characteristic values, and the fault diagnosis of the circuit is carried out according to the parameter change of the inverter system; 通过偏度
Figure 918712DEST_PATH_IMAGE040
判断逆变系统电路信号的概率分布是否对称，峭度
Figure 623363DEST_PATH_IMAGE041
反映逆变系统输出信 号概率分布的陡峭程度，信号中均值为
Figure 709743DEST_PATH_IMAGE042
、方差为
Figure 208857DEST_PATH_IMAGE043
的高斯随机变量的
Figure 570568DEST_PATH_IMAGE027
阶累积量
Figure 813331DEST_PATH_IMAGE044
。 by skewness
Figure 918712DEST_PATH_IMAGE040
Judging whether the probability distribution of the inverter system circuit signal is symmetrical, kurtosis
Figure 623363DEST_PATH_IMAGE041
Reflects the steepness of the probability distribution of the output signal of the inverter system, and the average value of the signal is
Figure 709743DEST_PATH_IMAGE042
, the variance is
Figure 208857DEST_PATH_IMAGE043
Gaussian random variable of
Figure 570568DEST_PATH_IMAGE027
order cumulant
Figure 813331DEST_PATH_IMAGE044
. 5.一种逆变系统控制保护电路，包括逆变系统，其特征在于：所述保护电路包括：5. A control and protection circuit for an inverter system, including an inverter system, characterized in that: the protection circuit includes: 故障信号采集模块电路，用于采集逆变系统运行过程中的故障数据信息；The fault signal acquisition module circuit is used to collect fault data information during the operation of the inverter system; 获取所述逆变系统的电路状态参数和运行数据参数；采集到逆变系统电路中输出的原 始样本数据特征向量为
Figure 960410DEST_PATH_IMAGE001
，原始样本数据联合概率密度函数为
Figure 427163DEST_PATH_IMAGE002
，数据 特征向量
Figure 541750DEST_PATH_IMAGE003
的
Figure 807777DEST_PATH_IMAGE045
阶累积通过累积量生成函数得到： Obtain the circuit state parameters and operating data parameters of the inverter system; the original sample data eigenvectors collected in the inverter system circuit are
Figure 960410DEST_PATH_IMAGE001
, the joint probability density function of the original sample data is
Figure 427163DEST_PATH_IMAGE002
, the data eigenvector
Figure 541750DEST_PATH_IMAGE003
of
Figure 807777DEST_PATH_IMAGE045
The order cumulation is obtained by the cumulant generating function:
Figure 324209DEST_PATH_IMAGE046
（1）
Figure 324209DEST_PATH_IMAGE046
(1) 在公式（1）中，当
Figure 961864DEST_PATH_IMAGE006
时，得到
Figure 314479DEST_PATH_IMAGE047
阶矩和
Figure 899044DEST_PATH_IMAGE008
阶累积量，
Figure 269982DEST_PATH_IMAGE008
阶累积量通过
Figure 16221DEST_PATH_IMAGE009
阶矩 计算得到，r表示常数，
Figure 384361DEST_PATH_IMAGE010
表示电路状态参数，
Figure 303776DEST_PATH_IMAGE011
表示运行数据参数，
Figure 279953DEST_PATH_IMAGE048
表示运行数据参 数数据集合；变换电路，用于变换采集逆变系统运行过程中的故障数据信息；根据电路状态 参数以及运行数据参数对变换电路的运行模式进行调整，其中运行模式控制变换逆变系统 变换电路的功率MOSFET关断状态； In formula (1), when
Figure 961864DEST_PATH_IMAGE006
when, get
Figure 314479DEST_PATH_IMAGE047
sum of moments
Figure 899044DEST_PATH_IMAGE008
step cumulant,
Figure 269982DEST_PATH_IMAGE008
order cumulant through
Figure 16221DEST_PATH_IMAGE009
The order moment is calculated, r represents a constant,
Figure 384361DEST_PATH_IMAGE010
Indicates the circuit state parameter,
Figure 303776DEST_PATH_IMAGE011
Indicates the operating data parameters,
Figure 279953DEST_PATH_IMAGE048
Represents the data set of operating data parameters; the conversion circuit is used to convert and collect fault data information during the operation of the inverter system; adjust the operation mode of the conversion circuit according to the circuit state parameters and operation data parameters, and the operation mode controls the conversion of the inverter system Transforming the power MOSFET off state of the circuit; 功率MOSFET电路，用于控制变换电路实现故障数据信息的变换；通过故障诊断函数判断变换电路中故障数据信息，以切换或者调整逆变系统的运行状态，其中故障诊断函数通过k阶累积量实现变换电路中故障数据信息输出转换，其中：The power MOSFET circuit is used to control the transformation circuit to realize the transformation of fault data information; judge the fault data information in the transformation circuit through the fault diagnosis function to switch or adjust the operating state of the inverter system, wherein the fault diagnosis function realizes transformation through the k-order cumulant Output conversion of fault data information in the circuit, where: 转换公式为：The conversion formula is:
Figure 197094DEST_PATH_IMAGE013
（2）
Figure 197094DEST_PATH_IMAGE013
(2) 在公式（2）中，
Figure 773568DEST_PATH_IMAGE014
表示编码器输出值，
Figure 247406DEST_PATH_IMAGE015
表示故障信息，当
Figure 327358DEST_PATH_IMAGE016
大于1时，逆变系统 的运行状态记作为一种状态，当
Figure 946558DEST_PATH_IMAGE017
小于1时，逆变系统的运行状态记作为另一种状态，运 行状态的数据属性记作为符号集
Figure 479170DEST_PATH_IMAGE018
，
Figure 756699DEST_PATH_IMAGE019
为集合
Figure 691157DEST_PATH_IMAGE020
不相交的非空子集，
Figure 481259DEST_PATH_IMAGE021
为子集的个 数，对于电路故障信号的故障随机变量
Figure 248970DEST_PATH_IMAGE022
，三阶累积量推导函数为： In formula (2),
Figure 773568DEST_PATH_IMAGE014
Indicates the encoder output value,
Figure 247406DEST_PATH_IMAGE015
Indicates fault information, when
Figure 327358DEST_PATH_IMAGE016
When greater than 1, the running state of the inverter system is recorded as a state, when
Figure 946558DEST_PATH_IMAGE017
When it is less than 1, the running state of the inverter system is recorded as another state, and the data attribute of the running state is recorded as a symbol set
Figure 479170DEST_PATH_IMAGE018
,
Figure 756699DEST_PATH_IMAGE019
for collection
Figure 691157DEST_PATH_IMAGE020
disjoint non-empty subsets,
Figure 481259DEST_PATH_IMAGE021
is the number of subsets, for the fault random variable of the circuit fault signal
Figure 248970DEST_PATH_IMAGE022
, the third-order cumulant derivation function is:
Figure 517140DEST_PATH_IMAGE023
（3）
Figure 517140DEST_PATH_IMAGE023
(3) 在公式（3）中，设定采集到故障电路的特征信号的离散时间序列为0；其中逆变系统的输出端与故障信号采集模块电路的输入端连接，故障信号采集模块电路的输出端与变换电路的输入端连接，所述变换电路的输出端与功率MOSFET电路的输入端连接，所述功率MOSFET电路的输出端与逆变系统的输入端连接。In the formula (3), the discrete time sequence of the characteristic signal collected by the fault circuit is set to be 0; the output end of the inverter system is connected to the input end of the fault signal acquisition module circuit, and the output end of the fault signal acquisition module circuit is connected to The input end of the conversion circuit is connected, the output end of the conversion circuit is connected with the input end of the power MOSFET circuit, and the output end of the power MOSFET circuit is connected with the input end of the inverter system. 6.根据权利要求5所述的一种逆变系统控制保护电路，其特征在于：所述故障信号采集模块电路包括STM32F407VET6芯片的嵌入式控制器、与所述STM32F407VET6芯片的嵌入式控制器连接的LM358DR2G芯片电路和电阻电路。6. A kind of inverter system control protection circuit according to claim 5, is characterized in that: described fault signal acquisition module circuit comprises the embedded controller of STM32F407VET6 chip, is connected with the embedded controller of described STM32F407VET6 chip LM358DR2G chip circuit and resistor circuit. 7.根据权利要求5所述的一种逆变系统控制保护电路，其特征在于：变换电路包括嵌入 式控制器与所述嵌入式控制器连接的主电路功率二极管、电容
Figure 571684DEST_PATH_IMAGE049
、
Figure 80157DEST_PATH_IMAGE050
、电感
Figure 587361DEST_PATH_IMAGE051
、
Figure 393643DEST_PATH_IMAGE052
和电 阻电路，其中变换电路的直流输入电压为28V，负载电阻为
Figure 568273DEST_PATH_IMAGE053
，其中所述嵌入式控制器还连 接有电源电路和LM317单片线性的电源电压调节器，其中LM317单片线性的电源电压调节器 使变换电路的输出电压范围介乎1.2~37V，电源电压调节器的电压调节范围为： 7. A kind of inverter system control protection circuit according to claim 5, it is characterized in that: conversion circuit comprises embedded controller and the main circuit power diode that described embedded controller is connected, capacitor
Figure 571684DEST_PATH_IMAGE049
,
Figure 80157DEST_PATH_IMAGE050
,inductance
Figure 587361DEST_PATH_IMAGE051
,
Figure 393643DEST_PATH_IMAGE052
and resistance circuit, wherein the DC input voltage of the conversion circuit is 28V, and the load resistance is
Figure 568273DEST_PATH_IMAGE053
, wherein the embedded controller is also connected with a power supply circuit and a LM317 single-chip linear power supply voltage regulator, wherein the LM317 single-chip linear power supply voltage regulator makes the output voltage range of the conversion circuit between 1.2~37V, and the power supply voltage is regulated The regulator voltage regulation range is:
Figure 982068DEST_PATH_IMAGE054
（6）
Figure 982068DEST_PATH_IMAGE054
(6) 在公式（6）中，其中
Figure 242148DEST_PATH_IMAGE055
表示调节端电流，
Figure 852121DEST_PATH_IMAGE056
表示调节端对地电阻，
Figure 631989DEST_PATH_IMAGE057
表示调节端与输 出端之间的电阻。 In formula (6), where
Figure 242148DEST_PATH_IMAGE055
Indicates the adjustment terminal current,
Figure 852121DEST_PATH_IMAGE056
Indicates the resistance of the adjustment terminal to ground,
Figure 631989DEST_PATH_IMAGE057
Indicates the resistance between the adjustment terminal and the output terminal. 8.根据权利要求5所述的一种逆变系统控制保护电路，其特征在于：变换电路还设置有Sepic斩波变换电路，使电路在连续导通模式下限制启动电流和冲击电流。8. A control and protection circuit for an inverter system according to claim 5, wherein the conversion circuit is further provided with a Sepic chopper conversion circuit, so that the circuit limits the starting current and the inrush current in the continuous conduction mode. 9.根据权利要求5所述的一种逆变系统控制保护电路，其特征在于：功率MOSFET电路导 通状态下变换电路产生三个回路，将电源、电感
Figure 403636DEST_PATH_IMAGE058
和功率MOSFET构成第一回路，此时经过
Figure 151012DEST_PATH_IMAGE058
的电流在电源电压作用下线性增长，第二回路包括电容
Figure 564676DEST_PATH_IMAGE059
、功率MOSFET和电感
Figure 992859DEST_PATH_IMAGE060
，此时 电感
Figure 466565DEST_PATH_IMAGE060
的电流在电容
Figure 170079DEST_PATH_IMAGE059
放电的影响下增加，第三回路通过电容
Figure 872587DEST_PATH_IMAGE061
向主电路的负载供电。 9. A kind of inverter system control and protection circuit according to claim 5, characterized in that: the conversion circuit generates three loops under the conduction state of the power MOSFET circuit, and the power supply, the inductor
Figure 403636DEST_PATH_IMAGE058
and the power MOSFET constitute the first loop, at this time through
Figure 151012DEST_PATH_IMAGE058
The current increases linearly under the action of the power supply voltage, and the second loop includes a capacitor
Figure 564676DEST_PATH_IMAGE059
, power MOSFET and inductor
Figure 992859DEST_PATH_IMAGE060
, at this time the inductance
Figure 466565DEST_PATH_IMAGE060
The current in the capacitor
Figure 170079DEST_PATH_IMAGE059
increase under the influence of the discharge, the third loop through the capacitor
Figure 872587DEST_PATH_IMAGE061
Supply power to the load in the main circuit.
CN202210990137.0A 2022-08-18 2022-08-18 Inverter system control method and protection circuit Active CN115085571B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210990137.0A CN115085571B (en) 2022-08-18 2022-08-18 Inverter system control method and protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210990137.0A CN115085571B (en) 2022-08-18 2022-08-18 Inverter system control method and protection circuit

Publications (2)

Publication Number Publication Date
CN115085571A CN115085571A (en) 2022-09-20
CN115085571B true CN115085571B (en) 2023-02-03

Family

ID=83244104

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210990137.0A Active CN115085571B (en) 2022-08-18 2022-08-18 Inverter system control method and protection circuit

Country Status (1)

Country Link
CN (1) CN115085571B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105044624A (en) * 2015-08-11 2015-11-11 上海海事大学 Seven-electric level inverter with fault diagnosis function and fault diagnosis method
CN105277823A (en) * 2015-10-09 2016-01-27 许继集团有限公司 Inverter fault diagnosis method
US20160216332A1 (en) * 2015-01-26 2016-07-28 Rolls-Royce Plc Open switch fault detection and identification in a two-level voltage source power converter
CN112731019A (en) * 2020-12-21 2021-04-30 合肥工业大学 Fault diagnosis method for ANPC three-level inverter
CN113850154A (en) * 2021-09-06 2021-12-28 同济大学 Inverter IGBT (insulated Gate Bipolar transistor) micro fault feature extraction method based on multi-modal data

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04210779A (en) * 1990-12-14 1992-07-31 Mitsubishi Electric Corp Ground fault detector for inverter unit and detecting method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160216332A1 (en) * 2015-01-26 2016-07-28 Rolls-Royce Plc Open switch fault detection and identification in a two-level voltage source power converter
CN105044624A (en) * 2015-08-11 2015-11-11 上海海事大学 Seven-electric level inverter with fault diagnosis function and fault diagnosis method
CN105277823A (en) * 2015-10-09 2016-01-27 许继集团有限公司 Inverter fault diagnosis method
CN112731019A (en) * 2020-12-21 2021-04-30 合肥工业大学 Fault diagnosis method for ANPC three-level inverter
CN113850154A (en) * 2021-09-06 2021-12-28 同济大学 Inverter IGBT (insulated Gate Bipolar transistor) micro fault feature extraction method based on multi-modal data

Also Published As

Publication number Publication date
CN115085571A (en) 2022-09-20

Similar Documents

Publication Publication Date Title
CN106849828B (en) A kind of MOSFET parallel current-equalizing circuit based on fault diagnosis
CN106208141B (en) A kind of V2G charge and discharge devices with no-power compensation function
CN110346687B (en) Intelligent socket with power failure fault recording function
CN111239471B (en) Commutation failure protection method and device, computer equipment and storage medium
CN112994429A (en) Fault tolerance control method for input-parallel output-series boost converter
CN111030486A (en) Parameter-free finite set model predictive control method for three-level grid-connected inverter
CN118393393B (en) Three-phase durability test circuit suitable for single-phase switching power supply and switching power supply
CN111665388A (en) Non-invasive household air conditioner identification method
CN113067397A (en) Electrical conversion and control system of wave energy power generation device
CN115085571B (en) Inverter system control method and protection circuit
CN108595376A (en) Non-invasive load identification method for distinguishing fixed-frequency air conditioner and percussion drill
CN214591177U (en) Alternating information detection circuit, power control circuit and water dispenser
CN109241874B (en) Power signal filtering method in energy decomposition
CN103543353B (en) Direct current acquisition method under a kind of wide temperature environment
CN201925093U (en) Wind power generation paddle changing driver
CN214412600U (en) Switch power supply fault monitoring circuit
CN212932824U (en) Metering device state evaluation system based on Internet of things
CN116359599A (en) A kind of current energy harvesting device and method
CN110649656B (en) Grid-connected system of photovoltaic power station
CN109104077A (en) Photovoltaic module power converter overheat protector control method and device
CN203313064U (en) High-frequency switching power supply module
CN114660493B (en) Battery cell information acquisition circuit and battery cell internal resistance acquisition method
CN118330374B (en) DC transformer for new energy DC grid connection and control method thereof
CN111505388B (en) Device and method for monitoring output capacitance tan delta of CCM buck converter
CN117543563B (en) Short-term power load prediction method and system based on machine learning

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant