6.4 Reliability of relay protection equipment family-在线视频

Welcome back
欢迎回来

This lecture will start to learn Section 6.4
这节课将开始学习6.4节

This section is about reliability analysis of relay protection equipment family based on big data
这节课是关于基于大数据的继电保护设备家族可靠性分析

Let's first look at the business requirements for this reliability analysis
首先来看看进行这项可靠性分析的业务需求

the rapid development of UHV AC-DC hybrid power grid
特高压交直流混合电网的快速发展

a large number of new energy and power electronic components connected to the power grid
新能源和电力电子元件大量接入电网

make the operation characteristics of the power grid have changed significantly
使电网运行特性发生了重大变化

and the power grid relay protection is facing new development and challenges
电网继电保护面临新的发展和挑战

The first line of defense to ensure the safe and stable operation of the power grid
保障电网安全稳定运行的第一道防线

is to keep the protection equipment in good operation condition and correct software and hardware
是保护设备保持良好的运行状态，软硬件正确无误

Due to historical reasons, the models and versions of protection equipment are different
由于历史原因导致保护设备型号、版本不一

Even if the same type of protection equipment from the same manufacturer has many software versions
即使同一制造厂家的同一型号保护设备也存在众多的软件版本

their configuration and functional logic are different
其配置、功能逻辑各不相同

If some family defects cannot be identified and handled in time and accurately
一些家族性缺陷如不能及时准确识别和处理

it may bring risks to the safe operation of equipment and power grid
将可能给设备和电网安全运行带来风险亟需建立继电保护设备家族型号模型

so it is necessary to establish a family model of relay protection equipment
因此有必要建立继电保护设备家族模型

It lays an important foundation for the state identification of protection equipment
为保护设备的状态识别奠定了重要的基础

After understanding the business requirements of reliability analysis in this section
在了解了本小节可靠性分析的业务需求之后

let's look at the application objectives of this analysis
让我们看看这项分析工作的应用目标

To establish the family model of protection equipment
建立起保护设备家族型号模型

Integrate the variable information of protection equipment description and protection equipment operation description
整合防护设备描述和防护设备操作描述的变量信息

and the basic information of protection equipment is modeled and expanded
对保护设备基本信息进行建模与拓展

After normalizing the family model of protection equipment
对保护设备家族型号进行归一化处理后

the family model of protection equipment is established by clustering analysis algorithm
通过聚类分析算法，建立起保护设备家族型号模型

and the reliability analysis of the family model of protection equipment is carried out by using the reliability evaluation method of relay protection
并应用继电保护可靠性评估方法对保护设备族模型进行了可靠性分析

so as to provide support for the safe and stable operation of power grid
为电网安全稳定运行提供支撑

Now let's look at the analysis methods and application results involved in this analysis
现在来看看这项分析所涉及的分析方法与应用成果

Through the extraction and integration of operation management system (OMS)
通过抽取与融合电网调度管理系统（Operation Management System, OMS）

relay protection statistical analysis system and power production management system (PMS) system related data of relay protection equipment
继电保护统计分析系统与生产管理系统（Power Production Management System, PMS）系统内继电保护设备相关数据

the standard data model of protection equipment description is designed and established
设计并建立保护设备描述标准数据模型

By collecting the operation defect and action data of power grid protection equipment
通过采集电网保护设备运行缺陷、动作数据

the variables that affect the health status and action of this kind of equipment are put forward
提出影响该类设备健康状态和动作的变量

and the family model of protection equipment is established by cluster analysis method
并运用聚类分析方法建立保护设备家族模型

The operation defects of the protection equipment of the same family model is obtained through analysis
通过分析得到同族型号保护设备的可靠性

which provides the reliability basis for the identification of the operation status of each protection equipment in the whole network
进而为全网每一台保护设备运行状态的判别提供可靠性依据

identifies the weak links of the operation reliability of the protection equipment
识别出保护设备运行可靠性的薄弱环节

and provides support for the state maintenance and technical transformation of the power grid protection equipment
对电网保护设备开展状态检修和技术改造提供支持

Let's take a look at the process of this analysis method based on the actual situation
下面结合实际情况看看这种分析方法的过程

There are four steps
一共有四步

The first is data extraction
首先是数据抽取

For data extraction,more than 300000 pieces of equipment information are extracted from OMS and relay protection statistical analysis system
对于数据抽取来说，从OMS、继电保护统计分析系统中抽取设备信息共30余万条

including 220kV and above voltage level protection equipment of conventional substation
包括常规变电站220KV及以上电压等级保护设备

various voltage level protection equipment of intelligent substation
智能变电站各电压等级保护设备

and some 110kV and below conventional substation protection equipment
以及部分110kV及以下常规变电站保护设备

operation data and defect records are extracted from OMS, relay protection statistical analysis system and PMS system
从OMS、继电保护统计分析系统和PMS系统中抽取运行数据及缺陷记录

including those since 2008,there are nearly 15000 defect records and nearly 100GB fault event of protection action information and recording data
包括2008年以来的缺陷记录近15000条，故障事件、保护动作信息和录波数据近100GB

The second part is establishment of standard data model for description of protection equipment
第二部分是保护设备描述标准数据模型建立

For this part,the standard data model of equipment description of protection equipment is the basis for subsequent analysis
保护设备的设备描述标准数据模型是开展后续分析工作的基础

It needs to integrate the variable information of description of protection equipment
需要融合保护设备描述变量信息

and the variable information of operation description of protection equipment
保护设备运行描述变量信息

The variable information of description of protection equipment
防护设备描述的可变信息

includes manufacturer, sampling type, output type, software version, protection category, etc.
包括制造厂家、采样类型、输出类型、软件版本、保护类别等

the variable information of operation description of protection equipment
保护设备运行描述变量信息

includes defects and non defects Category, times, causes, specific protection functions and hardware information of correct actions
包括发生缺陷和不正确动作的类别、次数、原因、具体保护功能、硬件信息等

The basic information of protection equipment is modeled and expanded based on CIM / E
基于电网通用模型描述规范（CIM/E）对保护设备基本信息进行建模与拓展

and the main contents of the model are listed in table 6.3
表6.3列出了模型的部分主要内容

Now,let's move to the third part cluster analysis of protection equipment family model
现在我们接着进行第三部分--保护设备家族型号聚类分析

According to the standard data model of equipment description
根据设备描述标准数据模型

the internal software version of protection equipment is classified into more than 20000 according to the management of different modules
将保护设备内部软件版本按不同模块管理归类至2万多项

and the protection equipment is classified into more than 5000 according to the model
将保护设备按型号归类至5000多项

after the normalization of the protection equipment model samples
对保护设备型号样本进行归一化处理后

the average distance measurement algorithm is selected for distance measurement
选用平均距离度量算法进行距离度量

according to the characteristics of various variables of the protection equipment
根据保护设备各种变量的特点

the Q-cluster analysis is carried out to establish the protection equipment
进行Q聚类分析以建立保护设备

So there are more than 200 family models of protective equipment
建立起保护设备家族型号共200多项

Taking a certain 14 types of protection equipment as an example
以某14种保护设备型号为例

the Euclidean distance square approximate matrix (see table 6.4) is calculated
计算出欧氏距离平方近似矩阵（见表6.4）

in which the specific model is identified with code x1-x14
其中具体型号用代码x1-x14进行标识

The 14 types of protection equipment in the example are grouped into 4 categories
将示例中的14种保护设备型号聚合为4类

by using the clustering algorithm of aggregation hierarchy
通过使用凝聚层次聚类的组间连接算法

In Python environment
在Python环境下

the approximate value of Euclidean distance square of 14 types of equipment is clustered
对14类设备欧式距离平方近似值进行聚类

and plot is called to draw the tree diagram
并调用plot进行树图的绘制

as shown in Figure 6.8
如图6.8所示

It can be seen from this figure that device models 9 and 11 are grouped into one class
从这幅图可以看出，设备型号9和11聚合为类

Model 1 and 12 are grouped as the second class
1和12为第二类

and 8 and 9 are grouped as the third class
8和9为第三类

and other device models are grouped into the last classes
而其他设备型号聚合为一类

Now,let's move to the last part reliability analysis of protection equipment
现在让我们来进行最后一部分保护设备可靠性分析

Reliability analysis of protection equipment,after establishing the family model
保护设备可靠性分析，建立家族型号后

each protection device can correspond to a protection device family
每台保护设备均可对应于某一保护设备家族

By calculating the number of the same family protection equipment in the whole network
通过计算全网同家族保护设备的数量

and associating the corresponding defect information
关联对应的缺陷信息

the family reliability index can be further calculated
就可以进一步计算家族可靠性指标

Table 6.5 lists the reliability evaluation results of 10 equipment families with a large number of protection equipment
表6.5种列出了保护设备数量较多的某10个设备家族可靠性评估结果

By combining the evaluation results with other evaluation indexes of protection equipment
通过将评估结果与保护设备的其他评估指标相结合

the accurate quantitative evaluation of each equipment can be completed
可以完成对每台设备的准确定量评估

and the operation status of the equipment can be judged
判断该设备的运行状态

The reliability indexes of all protection equipment families are calculated
计算全部保护设备家族的可靠性指标

and the results are shown in Figure 6.9
得到结果如图6.9所示

The number of each protection equipment family is proportional to the size of the element
其中各个保护设备家族数量与图元大小成比例

The different states of the family protection equipment correspond to different colors in the figure
家族保护设备的不同状态对应于图中的不同色彩

The cyan is the healthy state
青色为健康状态

the crimson is the early warning state
深红色为预警状态

and the orange and light red are the attention states
橙色、浅红色对应注意状态

From figure 6.9, it can be seen that
从图6.9可以看出

the reliability of some protection equipment families is low in the operation evaluation
部分保护设备家族在运行评价中可靠性较低

and there is a certain risk in the operation of the equipment
设备运行存在一定风险

which also becomes a weak point threatening the safe and stable operation of the power grid
同时也成为威胁电网安全稳定运行的薄弱点

According to the specific type of equipment included in the family
根据家族内所包含具体型号的设备

by relating the geographical location of each unit and the equipment under its jurisdiction
通过关联各单位地理位置、管辖设备情况

the distribution of the whole network of protection equipment that needs to be focused can be located
可以定位需重点关注的保护设备全网分布情况

providing strong support for targeted condition based maintenance work
为针对性状态检修工作开展

and precise investment in equipment technical transformation
和设备技术改造精准投资提供有力支撑

Ok, that’s all for this lecture
好的，这节课就上到这里

Next time we will move on to section 6.5
下一次我们将接着讲6.5节

Hope to see you again. Have a nice day.
希望能再次见到你。 祝你今天愉快