The Solution of Power Dispatch Automatic System

System Introduction

The rapid development of power system needs a consummate, advanced and efficient power net dispatch automatic system. Now power dispatch system including state, network, province three levels, have been equipped with power net dispatch automatic system. Furthermore power net of all country is connected.

Internet/Intranet technology should be a consideration factor for power plants in the new generation power net dispatch automatic system design. The design and development stage should be based on the SCADA function, DA/DMS, AM/FM/GIS and other subsystems as the extension functions, with an integrated networked and multi-functional platform system.

The system hardware adopts the latest and highly reliable hardware technology of micro computer as the system workstation and server hardware platform.

The system software of dispatch automatic system adopts new generation Microsoft Windows NT/2000 system. The database adopts high performance business relation type database like MS SQL Server, Oracle and Sybase and so on to standardize the software configuration. The system uses the excellent tool Microsoft office Excel for output, making the statement system more convenient to use. The software structure adopts client/server mode of network distribution type.

System Principle

System adopts hub to construct network structure with a network speed of 100Mb/s, configures dual-front-end station/data server, dual-controller workstation, information management workstation, smart multi-serial port, double-cut switches, modem rack and satellite clock. Additional workstation can be added upon requirements.

Up-load information: Information from RTU firstly is demodulated by modem and then transmitted into double-cut switches. Then through double-cut switches it is transmitted into two intelligent multi-serial ports simultaneously. Then from the two intelligent multi-serial ports it is sent to two front-end stations/data servers separately. After processed and saved by master front-end station/data server, the information is uploaded to network. At last, all workstations receive the information and deal with it.

Down-load information: Information coming from workstation is firstly transmitted to the master front-end station/data server for processing, and then transmitted to intelligent multi-serial ports, next, transmitted to the double-cut switch, finally, demodulated by modem and transmitted to RTU. Information that is transmitted to MIS network: Front-end station/data server offers hardware interface to MIS network, and transmits all the real-time and historical data to MIS network via that interface.

Transmits information to city power net dispatch system: Front-end station/data server deals with the real-time information from every workstation, assembles the information that City Power Net Dispatch System needs in the required format and frame order, then transmits it to City Power Net Dispatch System through intelligent multi-serial ports and double-cut switches.

Block Diagram

System Configuration

1) Controller Workstation
IPC-810A Chassis / FSC-1713VNA(B) / P4 2.4G / 256M / 80G / CD-ROM / FDD/ Function Cards
2) Front-end Station
IPC-810A Chassis / FSC-1713VNA (B) / P4 3.0G / 512M / 400G / Function Cards
3) Statement Workstation
IPC-810A Chassis / FSC-1713VNA (B) / P4 2.4 / 256M / 80G / CD-ROM / FDD / Function Cards
4) Maintenance Workstation
IPC-810A Chassis / FSC-1713VNA(B) / P4 2.4 / 256M / 80G / CD-ROM / FDD / Function Cards
5) Master Sever
HP + RAID System
6) WEB Server
IPC-8119 / NET-1712VD7N / P4 2.0 / 1G

System Evaluation

The system can be widely used in county or town level dispatch system. The system adopts EVOC Industrial PC especially in the core of front-end system, as a hardware platform, it greatly enhances the stability of the system. The high performance and low cost of EVOC Industrial PC provides system with a strong market competitiveness.