CN106932674B - Inverter output filter capacitor remaining life prediction method, device and power generation system - Google Patents
Inverter output filter capacitor remaining life prediction method, device and power generation system Download PDFInfo
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Abstract
本申请公开了逆变器输出滤波电容剩余寿命预测方法、装置和发电系统，该方法包括：判断逆变器是否处于运行状态；当判断得到逆变器处于运行状态时，控制逆变器内部功率器件关断，并控制并网开关保持闭合状态；获取逆变器输出滤波电容两端电压以及逆变器输出滤波电容上通过的电流；根据获取到的电压和电流计算逆变器输出滤波电容的容值。本申请实现了对逆变器输出滤波电容的剩余寿命进行预测。
The present application discloses a method, a device and a power generation system for predicting the remaining life of an inverter output filter capacitor. The method includes: judging whether the inverter is in a running state; when it is determined that the inverter is in the running state, controlling the internal power of the inverter The device is turned off, and the grid-connected switch is controlled to remain closed; the voltage across the inverter output filter capacitor and the current passing through the inverter output filter capacitor are obtained; Capacitance. The present application realizes the prediction of the remaining life of the output filter capacitor of the inverter.
Description
技术领域technical field
本发明涉及电力电子技术领域，更具体地说，涉及逆变器输出滤波电容剩余寿命预测方法、装置和发电系统。The present invention relates to the technical field of power electronics, and more particularly, to a method, device and power generation system for predicting the remaining life of an inverter output filter capacitor.
背景技术Background technique
图1示出了一种发电系统(包括但不限于光伏发电系统、风力发电系统)，具有逆变器、滤波器和并网开关S等组成部件，其中：并网开关S闭合后，发电系统处于并网状态，逆变器将输入的直流电转换成交流电输出，滤波器对逆变器输出的交流电进行滤波后送入电网。Figure 1 shows a power generation system (including but not limited to a photovoltaic power generation system and a wind power generation system), which has components such as an inverter, a filter, and a grid-connected switch S, wherein: after the grid-connected switch S is closed, the power generation system In the grid-connected state, the inverter converts the input DC power into AC power output, and the filter filters the AC power output by the inverter and sends it to the grid.
目前，发电系统中常用的滤波器是LCL滤波器、LC滤波器及其衍生滤波器，滤波器中的电容(又称逆变器输出滤波电容)是通过高频电流最重要的元器件，对个体电容的剩余寿命进行有效的预测对整个发电系统的可靠性水平有着重要的影响。At present, the commonly used filters in power generation systems are LCL filters, LC filters and their derivative filters. The capacitor in the filter (also known as the inverter output filter capacitor) is the most important component for passing high-frequency current. Effective prediction of the remaining life of individual capacitors has an important impact on the reliability level of the entire power generation system.
发明内容SUMMARY OF THE INVENTION
有鉴于此，本发明提供了逆变器输出滤波电容剩余寿命预测方法、装置和发电系统，以实现对逆变器输出滤波电容的剩余寿命进行预测。In view of this, the present invention provides a method, device and power generation system for predicting the remaining life of an inverter output filter capacitor, so as to predict the remaining life of an inverter output filter capacitor.
一种逆变器输出滤波电容剩余寿命预测方法，包括：A method for predicting the remaining life of an inverter output filter capacitor, comprising:
判断逆变器是否处于运行状态；Determine whether the inverter is in running state;
当判断得到逆变器处于运行状态时，控制逆变器内部功率器件关断，并控制并网开关保持闭合状态；When it is judged that the inverter is in the running state, control the internal power devices of the inverter to turn off, and control the grid-connected switch to keep the closed state;
获取逆变器输出滤波电容两端电压以及逆变器输出滤波电容上通过的电流；Obtain the voltage across the inverter output filter capacitor and the current passing through the inverter output filter capacitor;
根据获取到的电压和电流计算逆变器输出滤波电容的容值。Calculate the capacitance of the inverter output filter capacitor according to the obtained voltage and current.
一种逆变器输出滤波电容剩余寿命预测方法，包括：A method for predicting the remaining life of an inverter output filter capacitor, comprising:
判断逆变器是否处于非运行状态；Determine whether the inverter is in a non-operational state;
当逆变器处于非运行状态时，判断逆变器直流母线电压是否低于预设值；When the inverter is in a non-operational state, determine whether the DC bus voltage of the inverter is lower than the preset value;
当逆变器直流母线电压低于所述预设值时，抬高逆变器直流母线电压；When the inverter DC bus voltage is lower than the preset value, raise the inverter DC bus voltage;
当逆变器直流母线电压不低于所述预设值时，控制并网开关闭合，再获取逆变器输出滤波电容两端电压以及逆变器输出滤波电容上通过的电流，根据获取到的电压和电流计算逆变器输出滤波电容的容值。When the inverter DC bus voltage is not lower than the preset value, control the grid-connected switch to close, and then obtain the voltage across the inverter output filter capacitor and the current passing through the inverter output filter capacitor. The voltage and current calculate the capacitance of the inverter output filter capacitor.
其中，所述抬高逆变器直流母线电压，包括：利用缓冲电路对逆变器直流母线电容进行充电，以抬高逆变器直流母线电压。Wherein, the raising the voltage of the DC bus of the inverter includes: using a buffer circuit to charge the capacitor of the DC bus of the inverter, so as to raise the voltage of the DC bus of the inverter.
一种逆变器输出滤波电容剩余寿命预测装置，包括：A device for predicting the remaining life of an inverter output filter capacitor, comprising:
信息获取单元，用于获取逆变器输出滤波电容两端电压以及逆变器输出滤波电容上通过的电流；an information acquisition unit, used for acquiring the voltage across the output filter capacitor of the inverter and the current passing through the output filter capacitor of the inverter;
控制单元，用于判断逆变器是否处于运行状态；当判断得到逆变器处于运行状态时，控制逆变器内部功率器件关断，并控制并网开关保持闭合状态；之后根据所述信息获取单元获取到的电压和电流计算逆变器输出滤波电容的容值。The control unit is used to judge whether the inverter is in the running state; when it is judged that the inverter is in the running state, it controls the internal power devices of the inverter to be turned off, and controls the grid-connected switch to keep the closed state; and then obtains according to the information The voltage and current obtained by the unit calculate the capacitance of the output filter capacitor of the inverter.
一种逆变器输出滤波电容剩余寿命预测装置，包括：A device for predicting the remaining life of an inverter output filter capacitor, comprising:
信息获取单元，用于获取逆变器输出滤波电容两端电压以及逆变器输出滤波电容上通过的电流；an information acquisition unit, used for acquiring the voltage across the output filter capacitor of the inverter and the current passing through the output filter capacitor of the inverter;
控制单元，用于判断逆变器是否处于非运行状态；当逆变器处于非运行状态时，判断逆变器直流母线电压是否低于预设值；当逆变器直流母线电压低于所述预设值时，抬高逆变器直流母线电压；当逆变器直流母线电压不低于所述预设值时，控制并网开关闭合，再根据所述信息获取单元获取到的电压和电流计算逆变器输出滤波电容的容值。a control unit for judging whether the inverter is in a non-operating state; when the inverter is in a non-operating state, judging whether the inverter DC bus voltage is lower than a preset value; when the inverter DC bus voltage is lower than the When the preset value is used, the inverter DC bus voltage is raised; when the inverter DC bus voltage is not lower than the preset value, the grid-connected switch is controlled to close, and then the voltage and current obtained by the information acquisition unit are obtained. Calculate the capacitance of the inverter output filter capacitor.
其中，所述控制单元通过控制缓冲电路对逆变器直流母线电容进行充电，来抬高逆变器直流母线电压。Wherein, the control unit charges the inverter DC bus capacitor by controlling the buffer circuit, so as to raise the inverter DC bus voltage.
一种发电系统，包括逆变器、滤波器和并网开关，所述逆变器的输出侧经过所述滤波器和所述并网开关接入电网，此外，所述发电系统还包括：如上述公开的任一种逆变器输出滤波电容剩余寿命预测装置。A power generation system includes an inverter, a filter and a grid-connected switch, and an output side of the inverter is connected to a grid through the filter and the grid-connected switch. In addition, the power generation system further includes: Any of the above disclosed devices for predicting the remaining life of an inverter output filter capacitor.
其中，所述逆变器输出滤波电容剩余寿命预测装置集成在所述逆变器内部。Wherein, the device for predicting the remaining life of the inverter output filter capacitor is integrated inside the inverter.
其中，所述发电系统为单相系统或三相系统。Wherein, the power generation system is a single-phase system or a three-phase system.
其中，当所述发电系统网侧接有负载时，所述逆变器输出滤波电容剩余寿命预测装置在切除所述负载的情况下进行工作。Wherein, when a load is connected to the grid side of the power generation system, the device for predicting the remaining life of the output filter capacitor of the inverter works under the condition of removing the load.
从上述的技术方案可以看出，本发明在逆变器没有功率输出的情况下，利用电网与滤波器构成电气回路，根据逆变器输出滤波电容的采样电压、电流计算电容的容值，进行电容剩余寿命预测，不需要额外增加硬件，也不需要引入复杂控制，简易安全的实现了对逆变器输出滤波电容的剩余寿命预测。It can be seen from the above technical solutions that the present invention uses the power grid and the filter to form an electrical circuit when the inverter has no power output, and calculates the capacitance value of the capacitor according to the sampling voltage and current of the output filter capacitor of the inverter, and performs The residual life prediction of the capacitor does not require additional hardware, nor does it need to introduce complex control, and the residual life prediction of the inverter output filter capacitor is easily and safely realized.
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的前提下，还可以根据这些附图获得其他的附图。In order to illustrate the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts.
图1为现有技术公开的一种发电系统结构示意图；1 is a schematic structural diagram of a power generation system disclosed in the prior art;
图2为本发明实施例公开的一种逆变器输出滤波电容剩余寿命预测方法流程图；2 is a flowchart of a method for predicting the remaining life of an inverter output filter capacitor disclosed in an embodiment of the present invention;
图3为采用LCL滤波器的发电系统结构示意图；Figure 3 is a schematic diagram of the structure of a power generation system using an LCL filter;
图4为本发明实施例公开的又一种逆变器输出滤波电容剩余寿命预测方法流程图；4 is a flowchart of another method for predicting the remaining life of an inverter output filter capacitor disclosed in an embodiment of the present invention;
图5为本发明实施例公开的一种逆变器输出滤波电容剩余寿命预测装置结构示意图。FIG. 5 is a schematic structural diagram of an apparatus for predicting the remaining life of an inverter output filter capacitor disclosed in an embodiment of the present invention.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
参见图2，本发明实施例公开了一种逆变器输出滤波电容剩余寿命预测方法，包括：Referring to FIG. 2, an embodiment of the present invention discloses a method for predicting the remaining life of an inverter output filter capacitor, including:
步骤S01：判断逆变器是否处于运行状态；当判断得到逆变器处于运行状态时，进入步骤S02；Step S01: judging whether the inverter is in a running state; when it is judged that the inverter is in a running state, go to step S02;
步骤S02：控制逆变器内部功率器件关断，并控制并网开关保持闭合状态；Step S02: control the internal power device of the inverter to be turned off, and control the grid-connected switch to keep the closed state;
步骤S03：获取逆变器输出滤波电容两端电压以及逆变器输出滤波电容上通过的电流；Step S03: acquiring the voltage across the inverter output filter capacitor and the current passing through the inverter output filter capacitor;
步骤S04：根据获取到的电压和电流计算逆变器输出滤波电容的容值。Step S04: Calculate the capacitance value of the inverter output filter capacitor according to the obtained voltage and current.
下面，以图1所示发电系统中的滤波器采用LCL滤波器为例，对图2所示技术方案进行详述。Hereinafter, the technical solution shown in FIG. 2 will be described in detail by taking the LCL filter as an example for the filter in the power generation system shown in FIG. 1 .
图1所示发电系统中的滤波器采用LCL滤波器时，对应的系统结构图如图3所示，其中所述LCL滤波器包括：三相桥臂侧电感Lm1、Lm2、Lm3，三相滤波电容C1、C2、C3，三相网侧电感Lg1、Lg2、Lg3；Lm1、C1和Lg1接在A相，Lm2、C2和Lg2接在B相，Lm3、C3和Lg3接在C相。When the filter in the power generation system shown in FIG. 1 adopts an LCL filter, the corresponding system structure diagram is shown in FIG. 3 , wherein the LCL filter includes: three-phase bridge arm side inductances L m1 , L m2 , L m3 , Three-phase filter capacitors C1, C2, C3, three-phase grid-side inductances L g1 , L g2 , L g3 ; L m1 , C1 and L g1 are connected to phase A, L m2 , C2 and L g2 are connected to phase B, L m3 , C3 and L g3 are connected to the C phase.
在控制逆变器内部功率器件关断后，逆变器停止功率输出，此时由于并网开关S保持闭合状态，所以对于任一相来说，本相电网与本相上的滤波电容、网侧电感构成电气回路，具体的：A相电网与C1、Lg1构成电气回路，形成电流I1，同时在C1上形成电压U1；B相电网与C2、Lg2构成电气回路，形成电流I2，同时在C2上形成电压U2；C相电网与C3、Lg3构成电气回路，形成电流I3，同时在C3上形成电压U3。After controlling the internal power devices of the inverter to be turned off, the inverter stops power output. At this time, since the grid-connected switch S remains closed, for any phase, the grid of this phase and the filter capacitors and grids on this phase The side inductance constitutes an electrical loop, specifically: the A-phase power grid and C1, L g1 form an electrical loop to form a current I 1 , and at the same time a voltage U 1 is formed on C1; the B-phase power grid and C2, L g2 form an electrical loop to form a current I 1 2 , at the same time, a voltage U 2 is formed on C2; the C-phase power grid forms an electrical circuit with C3 and L g3 to form a current I 3 , and a voltage U 3 is formed on C3 at the same time.
根据电容特性，对于A相来说，满足According to the capacitance characteristics, for phase A, the
2*π*f*C1*U1＝I1 2*π*f*C1*U 1 =I 1
计算得到Calculated
其中，f为电网频率；C1一方面表示电容元件，另一方面也表示这个电容元件的容值；U1为C1上电压的有效值；I1为C1上通过电流的有效值。Among them, f is the grid frequency; C1 represents the capacitive element on the one hand, and the capacitance value of the capacitive element on the other hand; U 1 is the effective value of the voltage on C1; I 1 is the effective value of the current passing through C1.
同理可以得到C2、C3的容值。Similarly, the capacitance values of C2 and C3 can be obtained.
由于电容容值的衰减程度与电容剩余寿命基本上是成正比的，所以通过计算得到C1、C2、C3当前的容值，即可预测出C1、C2、C3的剩余寿命。Since the attenuation of the capacitance value is basically proportional to the remaining life of the capacitor, the remaining life of C1, C2, and C3 can be predicted by calculating the current capacitance values of C1, C2, and C3.
根据图2和图3的相关描述可知，本实施例在逆变器没有功率输出的情况下，利用电网与滤波器构成电气回路，根据逆变器输出滤波电容的采样电压、电流计算电容的容值，进行电容剩余寿命预测，不需要额外增加硬件，也不需要引入复杂控制，简易安全的实现了对逆变器输出滤波电容的剩余寿命预测。According to the relevant descriptions in FIG. 2 and FIG. 3 , in this embodiment, when the inverter has no power output, the grid and the filter are used to form an electrical circuit, and the capacitance of the capacitor is calculated according to the sampled voltage and current of the output filter capacitor of the inverter. value, predicting the remaining life of the capacitor, without adding additional hardware or introducing complex control, it is simple and safe to predict the remaining life of the inverter output filter capacitor.
参见图4，本发明实施例公开了又一种逆变器输出滤波电容剩余寿命预测方法，包括：Referring to FIG. 4 , an embodiment of the present invention discloses yet another method for predicting the remaining life of an inverter output filter capacitor, including:
步骤S01：判断逆变器是否处于非运行状态；当判断得到逆变器处于非运行状态时，进入步骤S02；Step S01: judging whether the inverter is in a non-operating state; when it is determined that the inverter is in a non-operating state, go to step S02;
步骤S02：判断逆变器直流母线电压是否低于预设值；当判断得到逆变器直流母线电压低于所述预设值时，进入步骤S03；当判断得到逆变器直流母线电压不低于所述预设值时，进入步骤S04；Step S02: determine whether the inverter DC bus voltage is lower than the preset value; when it is determined that the inverter DC bus voltage is lower than the preset value, go to step S03; when it is determined that the inverter DC bus voltage is not low At the preset value, enter step S04;
步骤S03：抬高逆变器直流母线电压，返回步骤S02；Step S03: Raise the DC bus voltage of the inverter, and return to Step S02;
具体的，可利用缓冲电路对逆变器直流母线电容进行充电，来抬高逆变器直流母线电压；Specifically, the buffer circuit can be used to charge the capacitor of the DC bus of the inverter to raise the voltage of the DC bus of the inverter;
步骤S04：控制并网开关闭合；Step S04: control the grid-connected switch to close;
具体的，逆变器处于非运行状态时，若逆变器直流母线电压过低，则并网开关闭合瞬间会出现冲击电流，所以需要预先将逆变器直流母线电压抬高；Specifically, when the inverter is in a non-operational state, if the voltage of the DC bus of the inverter is too low, an inrush current will appear at the moment when the grid-connected switch is closed, so the voltage of the DC bus of the inverter needs to be raised in advance;
步骤S05：获取逆变器输出滤波电容两端电压以及逆变器输出滤波电容上通过的电流，根据获取到的电压和电流计算逆变器输出滤波电容的容值。Step S05: Obtain the voltage across the inverter output filter capacitor and the current passing through the inverter output filter capacitor, and calculate the capacitance value of the inverter output filter capacitor according to the obtained voltage and current.
图4所述技术方案与图2的区别之处在于：图2是逆变器处于运行状态时的控制方式，而图4是逆变器处于非运行状态时的控制方式。但两者最终都是在逆变器没有功率输出的情况下，利用电网与滤波器构成电气回路，根据逆变器输出滤波电容的采样电压、电流计算电容的容值，进行电容剩余寿命预测的，属于同一发明构思。此外，图2和图4所示方法除了可以应用在三相系统外，也可以应用在单相系统，原理相同，此处不再赘述。在实际应用时，推荐将图2和图4所示方法共同应用在同一系统中。The difference between the technical solution shown in FIG. 4 and FIG. 2 is that: FIG. 2 shows the control mode when the inverter is in a running state, while FIG. 4 shows the control mode when the inverter is in a non-operating state. However, in the end, when the inverter has no power output, the grid and the filter are used to form an electrical circuit, and the capacitance value of the capacitor is calculated according to the sampling voltage and current of the filter capacitor output by the inverter, and the remaining life of the capacitor is predicted. , belong to the same inventive concept. In addition, the methods shown in FIG. 2 and FIG. 4 can also be applied to a single-phase system in addition to a three-phase system, and the principles are the same, which will not be repeated here. In practical application, it is recommended to use the methods shown in Fig. 2 and Fig. 4 together in the same system.
参见图5，本发明实施例公开了一种逆变器输出滤波电容剩余寿命预测装置，包括：Referring to FIG. 5 , an embodiment of the present invention discloses a device for predicting the remaining life of an inverter output filter capacitor, including:
信息获取单元100，用于获取逆变器输出滤波电容两端电压以及逆变器输出滤波电容上通过的电流；an
控制单元200，用于判断逆变器是否处于运行状态；当判断得到逆变器处于运行状态时，控制逆变器内部功率器件关断，并控制并网开关保持闭合状态；之后根据信息获取单元100获取到的电压和电流计算逆变器输出滤波电容的容值。The
此外，本发明实施例还公开了又一种逆变器输出滤波电容剩余寿命预测装置，包括：In addition, the embodiment of the present invention also discloses another device for predicting the remaining life of the output filter capacitor of the inverter, including:
信息获取单元，用于获取逆变器输出滤波电容两端电压以及逆变器输出滤波电容上通过的电流；an information acquisition unit, used for acquiring the voltage across the output filter capacitor of the inverter and the current passing through the output filter capacitor of the inverter;
控制单元，用于判断逆变器是否处于非运行状态；当逆变器处于非运行状态时，判断逆变器直流母线电压是否低于预设值；当逆变器直流母线电压低于所述预设值时，抬高逆变器直流母线电压；当逆变器直流母线电压不低于所述预设值时，控制并网开关闭合，再根据所述信息获取单元获取到的电压和电流计算逆变器输出滤波电容的容值。a control unit for judging whether the inverter is in a non-operating state; when the inverter is in a non-operating state, judging whether the inverter DC bus voltage is lower than a preset value; when the inverter DC bus voltage is lower than the When the preset value is used, the inverter DC bus voltage is raised; when the inverter DC bus voltage is not lower than the preset value, the grid-connected switch is controlled to close, and then the voltage and current obtained by the information acquisition unit are obtained. Calculate the capacitance of the inverter output filter capacitor.
具体的，所述控制单元通过控制缓冲电路对逆变器直流母线电容进行充电，来抬高逆变器直流母线电压。Specifically, the control unit charges the capacitor of the DC bus of the inverter by controlling the buffer circuit, so as to raise the DC bus voltage of the inverter.
本发明实施例还公开了一种发电系统，包括逆变器、滤波器和并网开关，所述逆变器的输出侧经过所述滤波器和所述并网开关接入电网，此外，所述发电系统还包括：如上述公开的任一种逆变器输出滤波电容剩余寿命预测装置。The embodiment of the present invention also discloses a power generation system, which includes an inverter, a filter and a grid-connected switch. The output side of the inverter is connected to the grid through the filter and the grid-connected switch. The power generation system further includes: any one of the devices for predicting the remaining life of the inverter output filter capacitor as disclosed above.
其中，所述逆变器输出滤波电容剩余寿命预测装置可以作为一个独立的器件存在，也可以集成在所述逆变器内部。当集成在所述逆变器内部时，所述逆变器输出滤波电容剩余寿命预测装置的控制单元可以与逆变器控制系统共用一个控制芯片，以节省成本。Wherein, the device for predicting the remaining life of the inverter output filter capacitor may exist as an independent device, or may be integrated inside the inverter. When integrated inside the inverter, the control unit of the device for predicting the remaining life of the output filter capacitor of the inverter can share a control chip with the inverter control system to save costs.
其中，所述发电系统可以是单相系统，也可以是三相系统，并不局限。另外，当所述发电系统网侧接有负载(所述负载可以是纯负载，也可以是储能逆变器)时，所述逆变器输出滤波电容剩余寿命预测装置在切除所述负载的情况下进行工作。Wherein, the power generation system may be a single-phase system or a three-phase system, which is not limited. In addition, when a load is connected to the grid side of the power generation system (the load may be a pure load or an energy storage inverter), the device for predicting the remaining life of the output filter capacitor of the inverter is removing the load. work under the circumstances.
综上所述，本发明在逆变器没有功率输出的情况下，利用电网与滤波器构成电气回路，根据逆变器输出滤波电容的采样电压、电流计算电容的容值，进行电容剩余寿命预测，不需要额外增加硬件，也不需要引入复杂控制，简易安全的实现了对逆变器输出滤波电容的剩余寿命预测。To sum up, the present invention uses the power grid and the filter to form an electrical circuit when the inverter has no power output, calculates the capacitance value of the capacitor according to the sampling voltage and current of the filter capacitor output by the inverter, and predicts the remaining life of the capacitor. , does not need to add additional hardware, and does not need to introduce complex control, it is simple and safe to realize the remaining life prediction of the output filter capacitor of the inverter.
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。对于实施例公开的装置而言，由于其与实施例公开的方法相对应，所以描述的比较简单，相关之处参见方法部分说明即可。The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. As for the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method.
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明实施例的精神或范围的情况下，在其它实施例中实现。因此，本发明实施例将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。The above description of the disclosed embodiments enables any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the embodiments of the present invention . Thus, embodiments of the present invention are not to be limited to those shown herein, but are to be accorded the widest scope consistent with the principles and novel features disclosed herein.
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