CN109741592B - Automatic data acquisition implementation method for station electric energy acquisition terminal - Google Patents
Automatic data acquisition implementation method for station electric energy acquisition terminal Download PDFInfo
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- CN109741592B CN109741592B CN201910022089.4A CN201910022089A CN109741592B CN 109741592 B CN109741592 B CN 109741592B CN 201910022089 A CN201910022089 A CN 201910022089A CN 109741592 B CN109741592 B CN 109741592B
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Abstract
The invention relates to a method for realizing automatic data acquisition of a station electric energy acquisition terminal, which comprises the steps of firstly adding an electric energy meter needing data acquisition in the station electric energy acquisition terminal, and managing by taking a meter reading channel of the electric energy meter accessing the acquisition terminal as a unit; then, initiating an electric energy meter data acquisition processing task in the station electric energy acquisition terminal by taking a meter reading channel as a unit, judging whether data needing to be acquired exist or not every second, and judging according to a preset data automatic acquisition time interval; and when the time for acquiring the timing data meets the requirement, acquiring corresponding data of the electric energy meter in the meter reading channel. The invention increases the flexibility and expandability of application, ensures the accuracy and real-time performance of automatic acquisition intervals, separates the interface from the realization, efficiently manages the acquisition realization programs of various electric energy meters and achieves high cohesion and low coupling among program modules.
Description
Technical Field
The invention belongs to the technical field of data acquisition of power systems, and particularly relates to a method for realizing automatic data acquisition of a station electric energy acquisition terminal.
Background
With the progress of automation and intelligent technology of power systems, the automation requirement for data acquisition is more and more common. The collection of various data of the power supply company to the plant side is also reaching the situation of automatic collection, and the systematic automatic collection and analysis of various data are basically realized. The acquisition equipment at the plant side is mostly intelligent terminal equipment based on an embedded system, the plant electric energy acquisition terminal also belongs to the embedded system equipment, the acquisition of all electric energy meter data in a transformer substation is periodically completed in the electric energy acquisition terminal, the acquired data is processed, the data is converted into a format with a uniform requirement and is placed in a buffer area, and the data is written into a disk in a later storage task to complete the automatic acquisition work of the data.
The station electric energy acquisition terminal mainly acquires data of various electric energy meters in a transformer substation, and due to the fact that electric energy meter equipment is various and numerous, manual meter reading is time-consuming and labor-consuming, acquisition intervals have errors, and data accuracy is low, based on the fact, a method for automatically acquiring data of the station electric energy acquisition terminal is needed, and automatic acquisition of multi-interval curve data of various electric energy meter data is guaranteed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for realizing automatic data acquisition of a station electric energy acquisition terminal, which solves the problem of automatic data acquisition and processing of electric energy meters in a transformer substation in multiple devices, multiple types and multiple time points, can ensure efficient, accurate and automatic data acquisition, and achieves higher operation efficiency and economic benefit. The technical scheme adopted by the invention is as follows:
the method for realizing the automatic data acquisition of the plant station electric energy acquisition terminal comprises the following steps:
step 1, adding an electric energy meter needing data acquisition in a station electric energy acquisition terminal, and managing by taking a meter reading channel of the electric energy meter accessing the acquisition terminal as a unit, wherein each meter reading channel has a unique corresponding meter reading channel number;
the parameter data structure of each electric energy meter in one meter reading channel is managed through a meter reading channel structure linked list, a structure linked list is provided for each meter reading channel, and the added parameter structure of the electric energy meter is added to the back of the structure linked list of the meter reading channel to which the added parameter structure of the electric energy meter is connected;
step 2, initiating an electric energy meter data acquisition processing task in the plant station electric energy acquisition terminal by taking a meter reading channel as a unit, judging whether data needing to be acquired exist or not every second, and judging according to a preset data automatic acquisition time interval;
and 3, when the timing data acquisition time meets the requirement, acquiring corresponding data of the electric energy meter in the meter reading channel.
The invention has the beneficial effects that:
1) the station electric energy acquisition terminal manages the linked list structure of the electric energy meter equipment according to the meter reading channel, so that the addition and deletion of the electric energy meter are easier, and the flexibility and the expandability of application are improved.
2) The accuracy and the real-time performance of the automatic acquisition interval are ensured by adopting the binary synchronous semaphore provided by the real-time clock for interrupting the processing timing.
3) And a function pointer is used in a plant station electric energy acquisition terminal acquisition function structure body to define an acquisition processing function. The data acquisition function is assigned to the acquisition processing function pointer when a specific acquisition protocol is installed, the design has the advantages that the interface is separated from the implementation, acquisition implementation programs of various electric energy meters are efficiently managed, the pointer function is used as a form parameter to be transmitted to the data acquisition module with certain general functions, and the pointer function is packaged into the interface to improve the flexibility of codes and the convenience of later maintenance, so that the system structure is clearer, the layered design is convenient, the system abstraction is facilitated, and the high cohesion low coupling performance among program modules is achieved.
Drawings
FIG. 1 is a logic flow diagram of a data collection task for a meter reading channel of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The method for realizing the automatic data acquisition of the plant station electric energy acquisition terminal comprises the following steps:
step 1, adding an electric energy meter needing data acquisition in a plant station electric energy acquisition terminal, wherein the types and the quantity of the electric energy meters managed by the plant station electric energy acquisition terminal are possibly more, so that the parameters of the electric energy meters are not too dispersed, the electric energy meters are not managed by taking the electric energy meters as units, the electric energy meters are managed by taking meter reading channels accessed to the acquisition terminal as units, and each meter reading channel has a unique corresponding meter reading channel number. The parameter data structure of each electric energy meter in one meter reading channel is managed through a meter reading channel structure linked list. In order to find out parameters of an electric energy meter in a meter reading channel, a structure linked list is provided for each meter reading channel, and a parameter structure of an added electric energy meter is added to the back of the structure linked list of the accessed meter reading channel. And establishing a meter reading channel directory while establishing the meter reading channel structure linked list, wherein the meter reading channel directory is used for storing a file directory of subsequently acquired data. And after the structure linked list taking the meter reading channel as a unit is updated, the installation of the electric energy meter accessed in the station electric energy acquisition terminal is completed.
When the electric energy meter is installed, firstly, meter protocols are installed according to meter protocol parameters in the electric energy meter parameter structure body, a meter protocol installation function is called, and a collection processing function pointer in the electric energy meter parameter structure body is assigned in the meter protocol installation function.
And judging whether the meter reading channel is started or not according to the meter reading channel number parameter in the electric energy meter parameter structure body in the installation process of the electric energy meter, and if the meter reading channel is started for the first time, opening the meter reading channel and creating a meter reading channel binary synchronous semaphore. If the meter reading channel is started, updating the last meter parameter in the meter reading channel structure linked list to be the current electric energy meter parameter and the number of the electric energy meters in the meter reading channel plus one; and updating the current electric energy meter in the electric energy meter parameter structure body to be the last electric energy meter in the meter reading channel structure linked list, updating the next electric energy meter in the electric energy meter parameter structure body to be empty, and updating the next electric energy meter in the current electric energy meter structure in the electric energy meter parameter structure body to be the current electric energy meter.
The meter reading channel binary synchronous semaphore is created when the meter reading channel is started for the first time in the installation process of the electric energy meter, the semaphore is successfully acquired in a meter reading channel acquisition task to indicate that the meter reading channel is started successfully, and subsequent electric energy meter data timing acquisition operation processing can be carried out.
And 2, initiating an electric energy meter data acquisition and processing task in the plant station electric energy acquisition terminal by taking the meter reading channel as a unit, wherein the electric energy meter data acquisition and processing task cannot exit after being initiated for the first time, and the task stays in the memory until all electric energy meters in the meter reading channel are deleted and then exits.
In the task of data acquisition and processing of the electric energy meter, whether the data needing to be acquired exist or not is judged every second, and the judgment basis is the preset data automatic acquisition time interval. The second interval is controlled by a binary synchronous semaphore distributed to each meter reading channel, the semaphore is released once every second in the second interruption provided by the real-time clock, and the semaphore is directly acquired by a binary synchronous semaphore acquisition function provided by the system in the data acquisition and processing task. That is to say, the data acquisition and processing task is suspended in normal times, and the acquisition and processing of the data of the electric energy meter can be carried out only when the real-time clock interrupt service program releases the binary synchronous semaphore. The acquisition interval time for the timed acquisition can be set from one second.
And 3, when the timing data acquisition time meets the requirement, acquiring corresponding data of the electric energy meter in the meter reading channel. And calling data elements in the electric energy meter parameter structure, wherein the data type is a structure body, and a function pointer is defined in the structure body. In the protocol implementation module, a collection function is defined and assigned to a collection function data element in the electric energy meter parameter structure. The general data acquisition function is called in the acquisition function, and the acquisition function is a structural body.
The method comprises the following steps of (1) inputting a defined acquisition function structure body in a general data acquisition function in a parameter mode, wherein the acquisition content is divided into six parts: the method comprises the following steps of electric energy acquisition, demand/occurrence time acquisition, instantaneous quantity acquisition, voltage qualification rate acquisition, event record acquisition and state alarm acquisition, wherein the six steps are respectively provided with an acquisition function by an electric energy meter protocol. Therefore, the device with different protocols can be called from the protocol library more conveniently, and the initialization operation of the meter reading channel is carried out on the acquisition meter reading channel according to the device parameters. And converting the data collected from the electric energy meter into a uniformly specified format, and putting the data into a buffer area so as to store the data in a storage task.
As shown in fig. 1, the logic flow diagram of the meter reading channel data acquisition task of the present invention includes the following steps:
2.1, judging whether the number of the electric energy meters in the meter reading channel is larger than 0, if so, turning to the next step, and if not, turning to 2.10;
2.2, judging whether the binary synchronous semaphore of the meter reading channel is successfully acquired, if so, turning to the next step, and if not, turning to 2.10;
2.3, judging whether a first electric energy meter pointer parameter in the meter reading channel is effective, if so, turning to the next step, and if not, turning to 2.8;
2.4, judging whether the current time reaches the automatic data acquisition time, if so, turning to the next step, and if not, turning to 2.7;
2.5, acquiring equipment parameters of the electric energy meter, initializing a meter reading channel and acquiring reading data information;
2.6, data acquisition and processing, wherein after data acquisition, data processing is carried out according to decimal digits and unit setting of data in the parameter structure of the electric energy meter, and the data are placed into a designated buffer area;
2.7, reading a next electric energy meter parameter pointer in the linked list, judging whether the pointer is effective, if not, switching to the next step, and if so, switching to 2.5;
2.8, judging whether to initiate a storage task, if so, turning to the next step, and if not, turning to 2.1;
2.9, judging whether the initiation of the data storage task is successful, if not, turning to the next step, and if so, turning to 2.1;
and 2.10, ending the data acquisition task of the meter reading channel and exiting.
The meter reading channel parameters, the electric energy meter parameters and the acquisition functions are defined as follows based on the above implementation method:
a meter reading channel parameter structure:
structural body
{
Reading a channel number;
a meter reading channel file descriptor;
the number of intelligent meters in a meter reading channel is 000 by default;
a pointer of a parameter of a first ammeter in the meter reading channel;
a pointer of the parameter of the last ammeter in the meter reading channel;
}；
the electric energy meter parameter structure is as follows:
structural body
{
A smart meter number;
reading a channel number;
the number of the ammeter is reduced;
table address, compressed BCD code;
a meter reading scheme;
a function provided by an ammeter specification;
a pointer of a parameter of a previous ammeter in the meter reading channel;
a pointer of a parameter of a next ammeter in the meter reading channel;
}；
collecting a function:
structural body
{
Collecting a processing function pointer;
the ammeter sets a function pointer;
}；
general acquisition processing function architecture:
structural body
{
Acquiring and processing a function pointer by electric energy;
acquiring a processing function pointer by the demand/occurrence time;
an instantaneous quantity acquisition processing function pointer;
acquiring a processing function pointer according to the voltage qualification rate;
acquiring and processing a function pointer by an event record;
a state alarm acquisition processing function pointer;
}；
the meter protocol implementation module defines an acquisition function structure body:
the structure body:
{
an electrical energy acquisition function;
a demand/time of occurrence collection function;
an instantaneous quantity acquisition function;
voltage qualification rate collection function
Event record collection function
State alarm collection function
}；
The related functions in the above definitions can be realized by C/C + + language and the like.
Claims (4)
1. The method for realizing the automatic data acquisition of the station electric energy acquisition terminal is characterized by comprising the following steps of:
step 1, adding an electric energy meter needing data acquisition in a station electric energy acquisition terminal, and managing by taking a meter reading channel of the electric energy meter accessing the acquisition terminal as a unit, wherein each meter reading channel has a unique corresponding meter reading channel number;
the parameter data structure of each electric energy meter in one meter reading channel is managed through a meter reading channel structure linked list, a structure linked list is provided for each meter reading channel, and the added parameter structure of the electric energy meter is added to the back of the structure linked list of the meter reading channel to which the added parameter structure of the electric energy meter is connected;
step 2, initiating an electric energy meter data acquisition processing task in the plant station electric energy acquisition terminal by taking a meter reading channel as a unit, judging whether data needing to be acquired exist or not every second, and judging according to a preset data automatic acquisition time interval;
the interval of one second is controlled by a binary synchronous semaphore distributed to each meter reading channel, the binary synchronous semaphore is released once every second in the interruption provided by the real-time clock, and the binary synchronous semaphore is acquired in the data acquisition and processing task;
the data acquisition and processing task is suspended in normal times, and the data acquisition and processing of the electric energy meter can be carried out only when the real-time clock interrupt service program releases binary synchronous semaphore;
step 3, when the time for acquiring the timing data meets the requirement, acquiring corresponding data of the electric energy meter in the meter reading channel;
the method for acquiring the corresponding data of the electric energy meter in the meter reading channel in the step 3 comprises the following steps: calling data elements in a parameter structure of the electric energy meter, wherein the data type is a structure, and a function pointer is defined in the structure; in the protocol implementation module, defining a collection function and assigning the collection function to a collection function data element in the electric energy meter parameter structure body; calling a general data acquisition function in the acquisition function, wherein the acquisition function is a structural body;
the method comprises the following steps of (1) inputting a defined acquisition function structure body in a general data acquisition function in a parameter mode, wherein the acquisition content is divided into six parts: the method comprises the following steps of electric energy acquisition, demand/occurrence time acquisition, instantaneous quantity acquisition, voltage qualification rate acquisition, event record acquisition and state alarm acquisition, wherein the six steps are respectively provided with an acquisition function by an electric energy meter rule; converting data collected from the electric energy meter into a unified specified format, and putting the format into a buffer area;
the operation of acquiring the corresponding data of the electric energy meter in the meter reading channel in the step 3 comprises the following steps:
2.1, judging whether the number of the electric energy meters in the meter reading channel is larger than 0, if so, turning to the next step, and if not, turning to 2.10;
2.2, judging whether the binary synchronous semaphore of the meter reading channel is successfully acquired, if so, turning to the next step, and if not, turning to 2.10;
2.3, judging whether a first electric energy meter pointer parameter in the meter reading channel is effective, if so, turning to the next step, and if not, turning to 2.8;
2.4, judging whether the current time reaches the automatic data acquisition time, if so, turning to the next step, and if not, turning to 2.7;
2.5, acquiring equipment parameters of the electric energy meter, initializing a meter reading channel and acquiring reading data information;
2.6, data acquisition and processing, wherein after data acquisition, data processing is carried out according to decimal digits and unit setting of data in the parameter structure of the electric energy meter, and the data are placed into a designated buffer area;
2.7, reading a next electric energy meter parameter pointer in the linked list, judging whether the pointer is effective, if not, switching to the next step, and if so, switching to 2.5;
2.8, judging whether to initiate a storage task, if so, turning to the next step, and if not, turning to 2.1;
2.9, judging whether the initiation of the data storage task is successful, if not, turning to the next step, and if so, turning to 2.1;
and 2.10, ending the data acquisition task of the meter reading channel and exiting.
2. The method for realizing the automatic data acquisition of the plant electric energy acquisition terminal according to the claim 1, characterized in that a meter reading channel directory is established at the same time of establishing the meter reading channel structure linked list, and the meter reading channel directory is used for storing a file directory of the subsequently acquired data.
3. The method for realizing the automatic data acquisition of the plant electric energy acquisition terminal according to the claim 2, is characterized in that meter protocols are installed according to meter protocol parameters in the electric energy meter parameter structure, a meter protocol installation function is called, and an acquisition processing function pointer in the electric energy meter parameter structure is assigned in the meter protocol installation function.
4. The method for realizing the automatic data acquisition of the plant electric energy acquisition terminal according to the claim 3, characterized in that the electric energy meter data acquisition processing task cannot exit after being initiated for the first time, and the task stays in the memory until all the electric energy meters in the meter reading channel are deleted.
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