Design And Implementation Of Songyuan Electrical Network Economic Dispatch System

The electrical network economic dispatch research began in the 1950s, at that time,the research was did to solve electrical network's real-time monitoring and the adjustment. After the mid-1960s's Northeastern United States big power cut, the US and other countries of the world diverted the attention in the guarantee of electrical network security. Come up with SCADA (Supervisory Control and Data Acquisition) system, computer technology and automatic control technology combined perfectly. SCADA system is a milestone in the electrical network economic dispatch technology. The author also uses the SCADA system to carry on the data acquisition.This topic is the first phase of electrical network economic dispatch system of Songyuan, whose essential target is to work out the scientific electricity generation case, to revise the case unceasingly in practice, and to achieve the most ideal electricity generation effect. In the function, the system divides into two big main modules: Data collection and processing module, case formulation module. The system with the object-oriented thought design software and the relations database has manifested the software development new tendency. The author used VS.NET 2005 (the C# language) to develop, which could make development easier. Our team uses VSS2005 to carry on the source code management and the version control. The database is stored in ORACLE 9i, which is suitable for the data quantity of this system.The structure and the principle of work of the system are: read each unit's real-time data from RTU (Remote Terminal Unit) with SCADA (Supervisory Control and Data Acquisition) system. Reads in the data with the data-reading procedure from the SCADA system, filtrates and revise the data, sends it to the next module for making the electricity generation case.The system includes two major parts: Electricity generation case and electricity generation control. The electricity generation case is long-term; the electricity generation control is real-time. The electricity generation case constitutes by the following modules: system load predict, daily electricity generation case, monthly electricity generation case, hydroelectric case, unit combination, the tie line transaction case and so on.This system must maintain two databases, one is a temporary database deposited in the memory, which is the data source of the ORACLE database. It deposits the real-time data from SCADA, this part of data is mainly used to control and the monitor the electrical network unit; another is the case database which is stored in ORACLE. Because the data of temporary database is large in amount and is frequently read and written, it does not suit for ORACLE. In order to maintain consistency of the data, we need to update the data copy to ORACLE in each five minutes, for making the long-term case.In this topic, we focus on case database. The object in the case database includes: Unit, CASE, power plant, flow, and decision information and so on. And the most important object is CASE, is also called electricity generation case. Other objects connected with it. UNIT is the most basic part; the basis of electricity generation case comes from unit's field data. The case finally also operates on the unit. The flow is considered from administration's angle that the case decision maker works out a set of electricity generation case, needs to report the case examination to carry on the examination, the case, if needs to modify, the case decision maker also needs to make the revision, carries on the reexamination again, finally release the case through the release system.This system's major function module is: Case formulation module. This module's function includes: According to the data, using dynamic economy dispatch algorithm, control the unit, make daily electricity generation case and monthly electricity generation case, submit the case, examine the case, and modify the case and so on. This part of module is mainly implementation of dynamic economy dispatch algorithm, is similar to the expert system. The input data collection module decides output strategy (case). Certainly, making the electricity generation case needs software's automatic prompt facility; it also needs the artificial intervention. The system gives choices for the user, the user may choose the suitable strategy, simultaneously carries on completely or the part revision to the strategy. After the electricity generation case worked out, it can be submitted to the system, and chooses censor for the case. After examined, the case can be released through the system.This system involves three kinds of role: System manager, case decision maker and case censor. The system manager may assign for the different person's different rights, corresponding to their work.The system used the guidance tree technology, used the array for the tree node operation localization that sacrificed spatial complexity to receive in exchange for the time complexity. The system used Dundas Chart for .NET, which can make graph or diagram according to dataset to provide the more direct-viewing data demonstration way for the user.This topic has completed the Songyuan electrical network economic dispatch system's first phase, mainly has realized the system overall construction, the database structure design, the data extraction and store, and make chart. The first phase already was at present operational.The second phase's essential target is to revise the erroneous data using revision algorithm. The electric power automated system software does not have the extremely tedious computational logic, but the data came from the SCADA system is extremely disorderly and erroneous, therefore data processes and distinguishes with the computer will be used to revise it. The system must make more consideration in the portability, prepared for future system promotion and the transplant.