WO2022001154A1 - 一种脚本化的智能电表事件判断解析方法 - Google Patents
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- the invention relates to a method for judging an event of an intelligent electric meter, in particular to a method for judging and analyzing an event of an intelligent electric meter based on a script.
- the event recording function is an important functional module of the smart meter, which can monitor the real-time working conditions of the power grid according to the judgment conditions preset by the user.
- the pre-set judgment conditions for example, the voltage value exceeds a pre-set threshold T1
- a series of actions are performed, such as event recording, sending an alarm signal and so on.
- the logic for judging the occurrence of the event is: the voltage value is less than the threshold T1, and the current value is greater than the threshold T2; the logic for judging the end of the event is: the voltage value is greater than the threshold T3, or the current value is less than the threshold T4.
- the invention proposes a scripted smart meter event judgment and analysis method, which aims to improve the analysis and running speed of logical expressions during event judgment.
- a scripted smart meter event judgment and analysis method the steps are: constructing a logic script, each logic script corresponds to a smart meter event; the logic script includes a logic expression for judging events;
- the logical expression includes logical units connected together by logical operators
- Each of the logical units includes: a left variable address, a right variable address, an operator, a left variable address type and a right variable address type;
- the address mapping is constructed according to the type of the variable, that is, the corresponding variable address type: for the function type, a general function template is established in advance; when taking the value of the variable, if the variable address type is the function type, the corresponding function template will be used according to the function template.
- the variable address is converted to a function, and the result of the function's execution is used as the mapped value.
- the address mapping is constructed according to the type of the variable, that is, the corresponding variable address type: for the single-byte, double-byte and four-byte data types of the memory, when the value of the variable is taken, the corresponding variable address is used as the physical address of the memory. , and start from the physical address to read data by byte length, and use the read data as the mapping value.
- the address mapping is constructed according to the type of the variable, that is, the corresponding variable address type: for the RAM single-byte, double-byte and four-byte data types, when the value of the variable is taken, the corresponding variable address is used as the RAM address, and From this RAM address, data is read by byte length, and the read data is used as a mapping value.
- the address mapping is constructed according to the type of the variable, that is, the corresponding variable address type: for the immediate data type—the data of this type is a constant stored in the flash of the microcontroller, and the data in the variable address is directly used as the mapping value.
- the address mapping is constructed according to the type of the variable, that is, the corresponding variable address type: for the GPIO type, if it is a MCU platform where the data area and code area addresses do not overlap, the value on the MCU address bus pointed to by the variable address is used as a register. address, and take the corresponding register value as the mapping value; if it is a MCU with overlapping addresses in the data area and the code area, take the value on the MCU register address bus pointed to by the variable address as the register address, and take the corresponding register value as map value.
- each logic script includes a first logic expression for judging whether the event occurs, a second logic expression for judging whether the event ends, and a callback function corresponding to the event.
- the method for constructing the branch tree is: count the logical units appearing in the logical expression, obtain the information entropy corresponding to each logical unit, then sort the logical units according to the information entropy, and construct the branch tree according to the sorting.
- Step 1 Count the logical units that appear in the corresponding logical expressions, and the repeated occurrences are only counted once; the number of logical units provided is n;
- Step 2 The result of each logical unit is 0 and 1. 0 means logical false and 1 means logical true; arrange and combine the values of all possible logical units, there are 2 n cases in total; The combination forms a 2 n ⁇ n-dimensional matrix X, in which the elements of each row correspond to a value combination, and the elements of the i-th column correspond to the i-th logical unit;
- Step 3 Substitute each row of the matrix X into a logical expression to perform a logical operation, and form a 2 n ⁇ 1-dimensional vector Y according to the row order of all the rows of the operation results;
- Step 4 Combine X and Y according to the column direction, so that X and Y are combined into a matrix Z of 2 n ⁇ (n+1) dimensions;
- Step 5 Calculate the information entropy of the first n columns of matrix Z respectively:
- Step 5-1 For the i-th column, according to the different values of the elements of this column, divide the matrix Z into and Two matrices: Represents a matrix composed of rows where the i-th column of matrix Z is 1, and let the number of rows of the matrix be m; Represents a matrix composed of rows where the i-th column of matrix Z is 0, and let the number of rows of the matrix be n;
- Step 5-2 according to the matrix and The different values of the last column, continue to be divided into and will be divided into and There are four matrices: representation matrix The matrix formed by the row whose last column value is 1 in , let the number of rows of the matrix be m 1 ; representation matrix The matrix formed by the row whose last column value is 0, let the number of rows of the matrix be m 2 ; representation matrix A matrix composed of rows whose last column is 1, let the number of rows of the matrix be n 1 ; representation matrix A matrix composed of rows whose last column is 0, let the number of rows of the matrix be n 2 ;
- Step 5-3 Calculate the information entropy of the first n columns of matrix Z according to the information entropy formula, and use Entropy i to represent the information entropy of the i-th column of matrix Z, as follows:
- Steps 5-6 Sort the calculated information entropy from small to large in absolute value.
- step 6 of constructing the branch tree according to the sorting its specific steps are:
- Step 6-1 Build n layers corresponding to logical units one-to-one in order of priority. Each layer is used to place Node nodes corresponding to the logical units of the layer, and each Node node corresponds to one node matrix H;
- a Node node is established in the top first layer, and the matrix Z is used as the node matrix H corresponding to the Node node;
- Step 6-2 For the currently traversed layer, traverse each Node node in the layer;
- each Node node For each Node node, take its node matrix H, and suppose that the logical unit corresponding to this layer corresponds to the i-th column in matrix H, then according to the value of each row element in the i-th column of matrix H, divide H into a matrix and Represents a matrix composed of rows whose i-th column of matrix H is 1, and the number of rows of the matrix is set to be a; Represents a matrix composed of rows whose i-th column of matrix H is 0, and let the number of rows of the matrix be b;
- representation matrix The matrix formed by the row whose last column value is 1 in , let the number of rows of the matrix be a 1 ; representation matrix A matrix composed of rows whose last column is 0, let the number of rows of the matrix be a 2 ; representation matrix A matrix composed of rows whose last column is 1, let the number of rows of the matrix be b 1 ; representation matrix A matrix composed of rows whose last column is 0, let the number of rows of the matrix be b 2 ;
- both a 1 and a 2 are not 0, create a new Node in the next layer, and establish the path relationship between the current Node and the lower Node: when the logical unit value corresponding to the current Node is 1, the Node The node points to the lower Node node, and the current Node node's As the node matrix H of the lower node node, it is reserved for use when the lower node is traversed;
- both b 1 and b 2 are not 0, create a new Node in the next layer, and establish the path relationship between the current Node and the lower Node: when the logical unit value corresponding to the current Node is 0, the Node The node points to the lower Node node, and the current Node node's As the node matrix H of the lower-level Node node, it is reserved for use when the lower-level node is traversed.
- the path from the current Node node to a nearest leaf node is preferentially used as the next judgment branch.
- steps 1 to 6 are performed on a computer platform whose performance is better than that of the smart meter microcontroller.
- the present invention has the following beneficial effects: the method optimizes the logical expression for smart meter event judgment, carries out dynamic path optimization by means of statistical information entropy, constructs a corresponding branch tree, and then obtains based on the branch tree.
- the optimized judgment rules are written into the single-chip microcomputer, and finally the analysis and judgment of the logic expression is completed in the single-chip computer, thereby improving the running speed of the logic expression.
- Figure 1 is a flow chart for generating an event script.
- FIG. 2 is a schematic diagram of a jump branch tree.
- FIG. 3 is a flow chart of time script judgment.
- FIG. 4 is a flow chart of generating a jump branch tree.
- FIG. 5 is a schematic diagram of a jump branch tree judgment sequence.
- This embodiment first takes the judgment of a flow loss event as an example, and the specific control requirements of the event are as follows:
- the logic for judging the occurrence of an event is: the voltage value is less than the threshold T1, and the current value is greater than the threshold T2; the logic for judging the end of the event is: the voltage value is greater than the threshold T3, or the current value is less than the threshold T2.
- the first part shown in Figure 1, generates event scripts.
- the left variable address is represented by LVar
- the right variable address is represented by RVar
- the operator is represented by Op
- the left variable address type is represented by LType
- the right variable address type is represented by RType.
- LType and RType are the same, and the values are as follows: (function type, memory single-byte data type, memory double-byte data type, memory four-byte data type, RAM single-byte data type, RAM double-byte data type type, RAM four-byte data type, immediate data type, GPIO type).
- U32 indicates that the return data type is an unsigned 32-bit integer, function is the function name, and void indicates that the function does not accept incoming parameters.
- the address map of the function type is represented as:
- the meaning of the expression is: convert LVar or RVar into a function function defined by a general function template, pass in empty parameters, and use the converted function function execution result U32 type data as the mapping value.
- MemChip-1Byte( ) means to read one byte of data starting from the specified physical address, and expand the read data into U32 type data as map values.
- mapping method is similar to the memory single-byte data type, and will not be repeated.
- the address mappings are:
- (Byte_address)( ⁇ ) indicates that a value is used as a single-byte RAM address
- *( ⁇ ) indicates that the data pointed to by the address in the parentheses is taken out
- the final address mapping expands the taken value to U32 type as the mapping value .
- mapping method is similar to the single-byte data type of the memory, and will not be repeated here.
- the address mappings are:
- this type is a constant stored in the flash of the microcontroller, and its address is mapped as:
- bus_address( ) means to directly use LVar or RVar on the address bus of the single-chip microcomputer as the register address, and take the register value and expand it to U32 type data as the mapping value;
- reg_bus_address( ⁇ ) means to directly use LVar or RVar on the register address bus of the microcontroller as the register address, and take the register value and expand it to U32 type data as the mapping value.
- the judgment conditions include: the voltage value is less than the threshold T1; the current value is greater than the threshold T2; the voltage value is greater than the threshold T3; the current value is less than the threshold T2, a total of four Piece.
- A (voltage value RAM address, threshold T1 memory address, ⁇ , RAM four-byte type, memory four-byte type);
- C (voltage value RAM address, threshold T3 memory address, >, RAM four-byte type, memory four-byte type);
- D (current value RAM address, threshold T2 memory address, ⁇ , RAM four-byte type, memory four-byte type).
- the second part implements the analytical operation of the logical expression of the above script.
- (G-1) Find the address type of the left variable.
- the address type of the left variable RAM four-byte type.
- the address mapping rule the address of the left variable is converted into actual data.
- the mapping rule for the left variable address is: The left variable address is taken as the 4-byte RAM address, and the data corresponding to the address is taken out and converted to U32 type data;
- the logical expression parsing rule is carried out according to the following steps:
- each logical unit is 0 or 1, where 0 represents logical false and 1 represents logical true.
- Combining the values of all logical units there are 2 n cases, where n is the number of logical units. Arrange all the value combinations to form a 2 n ⁇ n-dimensional matrix X, in which the elements of each row represent the values of each logical unit;
- Entropy M 0.456
- Entropy N 0.603
- Entropy O 0.643
- Entropy P 0.643
- Entropy Q 0.635
- Entropy R 0.641
- (I-7) Determine the pre-judgment order of each logic unit according to the information entropy order calculated in (1-6), that is, the logic unit with the smaller absolute value of the information entropy is preferentially judged.
- the priority order of judgment is: M, S, N, Q, R, O, P;
- each layer is used to place Node nodes corresponding to the logical units of the layer, and each Node node Corresponds to a node matrix H;
- a Node node is established in the top first layer, and the matrix Z is used as the node matrix H corresponding to the Node node;
- each Node node For each Node node, take its node matrix H, and suppose that the logical unit corresponding to this layer corresponds to the i-th column in matrix H, then according to the value of each row element in the i-th column of matrix H, divide H into a matrix and Represents a matrix composed of rows whose i-th column of matrix H is 1, and the number of rows of the matrix is set to be a; Represents a matrix composed of rows whose i-th column of matrix H is 0, and let the number of rows of the matrix be b;
- representation matrix The matrix formed by the row whose last column value is 1 in , let the number of rows of the matrix be a 1 ; representation matrix A matrix composed of rows whose last column is 0, let the number of rows of the matrix be a 2 ; representation matrix A matrix composed of rows whose last column is 1, let the number of rows of the matrix be b 1 ; representation matrix A matrix composed of rows whose last column is 0, let the number of rows of the matrix be b 2 ;
- both a 1 and a 2 are not 0, create a new Node in the next layer, and establish the path relationship between the current Node and the lower Node: when the logical unit value corresponding to the current Node is 1, the Node The node points to the lower Node node, and the current Node node's As the node matrix H of the lower node node, it is reserved for use when the lower node is traversed;
- both b 1 and b 2 are not 0, create a new Node in the next layer, and establish the path relationship between the current Node and the lower Node: when the logical unit value corresponding to the current Node is 0, the Node The node points to the lower Node node, and the current Node node's As the node matrix H of the lower node node, it is reserved for use when the lower node is traversed;
- the worst case is a balanced binary tree.
- the information entropy of all logical units is the same, the number of leaf nodes is 2 n-1 , and each leaf is reached. Nodes need to be judged n times, in this case, the optimization effect cannot be obtained by this method.
- this method can significantly improve the judgment speed of actual logical expressions.
- the final jump branch tree obtained by the example script of this step is shown in Figure 2.
- Node represents a Node node
- M 0 represents the logical unit M with a value of
- M 1 represents the logical unit M with a value of 1, and the rest of the logical units are And so on
- leaf node 0 indicates that the output value of the final logical expression is
- leaf node 1 indicates that the output value of the final logical expression is 1;
- the process of jumping the branch tree will not be changed. Therefore, the process of generating the jump branch tree in steps (I-1) to (I-8) can be carried out on a device with strong computing power such as a computer, while the dynamic judgment process of the jump branch tree is performed by the single chip microcomputer of the smart meter. on the platform.
- the callback function CallBack is called according to the result to perform corresponding business actions, such as alarming and recording.
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- 一种脚本化的智能电表事件判断解析方法,其特征在于:构建逻辑脚本,每条逻辑脚本对应一个智能电表事件;所述逻辑脚本包含用于进行事件判断的逻辑表达式;所述逻辑表达式包括通过逻辑运算符连接在一起的逻辑单元;构建与各逻辑表达式一一对应的分支树,所述分支树的判断结果与所述逻辑表达式一致;依据分支树的跳转结构生成判断代码,将判断代码写入到智能电表的单片机中,用于实现逻辑表达式的动态实时判断。
- 如权利要求1所述的脚本化的智能电表事件判断解析方法,其特征在于,构建分支树的方法为:统计逻辑表达式中所出现的逻辑单元,求取各逻辑单元所对应的信息熵,然后依据信息熵对逻辑单元排序,依据排序构建所述分支树。
- 如权利要求2所述的脚本化的智能电表事件判断解析方法,其特征在于,构建分支树的具体方法为:步骤1、统计对应的逻辑表达式中所出现的逻辑单元,重复出现的只计一次;设有逻辑单元的数量为n;步骤2、每个逻辑单元的结果取值为0、1两种情况,0表示逻辑假,1表示逻辑真;将所有可能存在的逻辑单元取值进行排列组合,共有2 n种情况;将排列组合构成2 n×n维的矩阵X,其中每一行的元素分别对应一种取值组合情况,第i列的元素均对应第i个逻辑单元;步骤3、将矩阵X的每一行分别代入逻辑表达式进行逻辑运算,将所有行的运算结果按矩阵X的行序组成2 n×1维的向量Y;步骤4、将X,Y按照列方向进行组合,使X、Y组合成2 n×(n+1)维的 矩阵Z;步骤5、分别计算矩阵Z的前n列的信息熵:步骤5-1、对于第i列,按该列元素的不同取值,将矩阵Z分成 和 两个矩阵: 表示矩阵Z第i列取值为1的行所组成的矩阵,设该矩阵的行数为m; 表示矩阵Z第i列取值为0的行所组成的矩阵,设该矩阵的行数为n;步骤5-2、根据矩阵 和 最后一列的不同取值,继续将 划分为 和 将 划分为 和 共四个矩阵: 表示矩阵 中最后一列取值为1的行所组成的矩阵,设该矩阵的行数为m 1; 表示矩阵 最后一列取值为0的行所组成的矩阵,设该矩阵的行数为m 2; 表示矩阵 最后一列取值为1的行所组成的矩阵,设该矩阵的行数为n 1; 表示矩阵 最后一列取值为0的行所组成的矩阵,设该矩阵的行数为n 2;步骤5-3、根据信息熵公式计算矩阵Z前n列各自的信息熵,以Entropy i表示矩阵Z第i列的信息熵,有:步骤5-6、将计算得到的信息熵按绝对值由小到大进行排序。
- 如权利要求3所述的脚本化的智能电表事件判断解析方法,其特征在于,依据排序构建所述分支树的步骤6,其具体步骤为:步骤6-1、按优先级顺序由上至下构建n个与逻辑单元一一对应的分层,每个分层用于放置与该层的逻辑单元对应的Node节点,每个Node 节点对应一个节点矩阵H;在最上方的第一层中建立一个Node节点,将矩阵Z作为与该Node节点所对应的节点矩阵H;由上至下遍历各个分层,对于每个分层,分别执行步骤6-2至步骤步骤6-4,完成分支树的构建;步骤6-2、对于当前遍历到的分层,遍历该分层中的每个Node节点;对于每个Node节点,取其节点矩阵H,设该层所对应的逻辑单元与矩阵H中的第i列对应,则根据矩阵H第i列中各行元素的取值,将H分为矩阵 和 表示矩阵H第i列取值为1的行所组成的矩阵,设该矩阵的行数为a; 表示矩阵H第i列取值为0的行所组成的矩阵,设该矩阵的行数为b;然后根据矩阵 和 最后一列的不同取值,继续将 划分为 和 将 划分为 和 共四个矩阵: 表示矩阵 中最后一列取值为1的行所组成的矩阵,设该矩阵的行数为a 1; 表示矩阵 最后一列取值为0的行所组成的矩阵,设该矩阵的行数为a 2; 表示矩阵 最后一列取值为1的行所组成的矩阵,设该矩阵的行数为b 1; 表示矩阵 最后一列取值为0的行所组成的矩阵,设该矩阵的行数为b 2;步骤6-3、若a 1=0,新建一个结果值为0的叶子节点,并建立当前Node节点与该叶子节点之间的路径关系:当前Node节点对应的逻辑单元值为1时,该Node节点指向该叶子节点;若a 2=0,新建一个结果值为1的叶子节点,并建立当前Node节点与 该叶子节点之间的路径关系:当前Node节点对应的逻辑单元值为1时,该Node节点指向该叶子节点;若a 1和a 2均不为0,则在下一层新建一个Node节点,并建立当前Node节点与该下层Node节点之间的路径关系:当前Node节点对应的逻辑单元值为1时,该Node节点指向该下层Node节点,并将当前Node节点的 作为该下层Node节点的节点矩阵H,留作该下层节点被遍历到时使用;步骤6-4、若b 1=0,新建一个结果值为0的叶子节点,并建立当前Node节点与该叶子节点之间的路径关系:当前Node节点对应的逻辑单元值为0时,该Node节点指向该叶子节点;若b 2=0,新建一个结果值为1的叶子节点,并建立当前Node节点与该叶子节点之间的路径关系:当前Node节点对应的逻辑单元值为0时,该Node节点指向该叶子节点;
- 如权利要求4所述的脚本化的智能电表事件判断解析方法,其特征在于:生成跳转分支树后,按分支树从上至下的方向遍历所有Node节点,根据路径关系和叶子节点对应的结果值生成判断代码,将判断代码写入智能电表的单片机,用于完成动态实时判断。
- 如权利要求5所述的脚本化的智能电表事件判断解析方法,其特征在于:遍历分支树的所有Node节点生成判断代码时,对于当前Node节点,优先将从当前Node节点开始到一个最近的叶子节点的路径作为下一步的判断分支。
- 如权利要求4至6任一所述的脚本化的智能电表事件判断解析方法,其特征在于:所述步骤1至6在性能优于智能电表单片机的计算机平台上进行。
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