The Design And Implementation Of Data Statistics And Analysis Subsystem In New Energy Remote Control System

In recent years,the number of new energy power stations is increasing rapidly.New energy power stations are located in remote areas with scattered layouts.There are many on-site equipment.It is difficult to supervise and inspect.In order to achieve remote automatic monitoring of the power station,the PCS-9700(Process Control System)new energy remote control system is designed and implemented by NR Electric Co.,Ltd.The system integrates data acquisition,real-time calculation,statistical analysis,remote control and other functions.As the core function of the system,the data statistical calculation and analysis needs to achieve the periodic calculation of the power generation,availability,failure rate and other 207 kinds of business statistics indicators for various models such as fans and photovoltaic inverters.The model objects involved are complex,there are many kinds of indicators,and the amount of data is huge.How to calculate and process business indicators in real time has become a problem in system development.In order to solve the above problems,this paper designs and implements a data statistics and analysis subsystem.As the statistics of business indicators are in the period of day,month,year and so on,and the relation between the calculation of the indicator is included,such as the amount of electricity loss is calculated by the calculation of the theoretical generation and the actual power generation,the subsystem adopts a plug-in architecture to extract the basic indicator and design the calculation process as a separate plug-in for calculation of other indicators,thereby avoiding the repetitive calculation of the indicators.The subsystem uses the cross-platform Qt C++ application development framework as its basic framework to improve the generality and portability of the system.It uses the dynamic link library(DLL)technology to achieve the plug-in design.In view of the complex features of the business model and the real-time requirements of the data storage,the object-oriented real-time database technology is adopted.The subsystem is divided into computation service scheduling module,data management module,plug-in management module,indicators periodic calculation module and plug-in configuration module.The computation service scheduling module is responsible for controlling the calculation process.The data management module is responsible for accessing the database.The plug-in management module is responsible for maintaining the plug-in information.The indicators periodic calculation module is responsible for performing calculation tasks.The plug-in configuration module is responsible for providing a graphical interface plug-in configuration tool.At present,this subsystem has been integrated and put into use in the PCS-9700 centralized control system.This subsystem has realized efficient statistical calculation of business indicators.By analyzing the business indicators,the managers can grasp the operation status of the power station and adjust the production plan in time.