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Online analysis and early warning system for relay protection

Based on the real-time data of power system obtained by EMS/SCADA/DMS system, including the system topology structure, system operation mode, protection configuration, protection fixed value, etc., the system can distinguish the unreasonable protection configuration, protection misoperation and abnormality in the system and give alarm information, so as to realize the real-time online monitoring and early warning of the fixed value of relay protection.

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Online analysis and early warning system for relay protection

Introduction

System advantage

System functions

System introduction

※ Scope of application: Applicable to dispatching departments of industrial and mining enterprises at all levels, distributed power grid, regional oil field power grid system, large industrial and mining enterprises, metallurgy, petroleum and petrochemical enterprises, used for power system fault analysis and relay protection setting calculation.

System advantage

B/S architecture model is adopted for visualization modeling and calculation.
Provide an integrated data platform for intelligent interaction; Based on the fixed-value generation technology of the protection device, the calculation book and the fixed-value sheet can be generated automatically.
Advanced artificial intelligence algorithm is used to calculate the protection setting.
Setting calculation for running system, unified management of the whole process;

System function

System maintenance function

System maintenance function is an important part of the whole system, it through the main interface for data interaction, so as to maintain the operation of the whole system, the system according to the user's Settings, to reasonably arrange the grid position of each node and bus stations drawing system will automatically generate power plant and power grid system topology, can automatically generate the main wiring diagram, protection configuration diagram and so on.
Graphical modeling

The user can draw the system diagram and input the original parameters through the graphical interface, and the computer can automatically identify the system network structure, and establish the corresponding mathematical model of the power system network according to the needs. Through the man-machine interface, you can select protection configuration, set fault type and fault point, and select protection information.
Fault analysis function

In order to realize the function of calculating short-circuit current when various types of faults occur in the electrical system.
Provides a human-machine dialogue interface for setting faults. The fault location is marked with eye-catching graphics, and the fault type and fault phase are set through man-machine dialogue interface. The fault type includes three-phase short circuit, one-way short circuit, two-phase short circuit and two-phase ground short circuit. Multiple fault points are allowed to be set at one time, for example, there are multiple fault points in a system, so as to meet the requirements of user selection and comparison of calculation results; Automatically generate sequence network diagram. For asymmetrical fault, generate positive - negative - zero - three - sequence network diagram automatically.
Set the computing module

The setting calculation module is the core of the setting system, which can configure the corresponding protection for generators, transformers, lines, busbars and so on. The protection device is the representative protection in China at present, and the setting calculation of the configured protection is carried out.
Constant value simulation verification module

Fixed value simulation mainly mainly through comparative fault calculation of information protection failure of installation and configuration, system in setting up different grid point of failure, failure types and protection after refusing action conditions, can according to need, under different operation modes, the complete simulation validation, the coordinate detection system of protection and the matching degree between each other.
Fault simulation function

To built the main wiring diagram, the fault simulation module can be set up according to the need on the bus any type of fault, protection setting for mismatch, and the problem of insufficient sensitivity calculation can be used according to the fault simulation results compared with the relay protection setting value to judge the actions of relay protection device, after completion of the simulation, simulation to automatically generate a complete report, including the system operation mode and fault Point, fault type, fault quantity, protection value, action time, etc.
Database management module

The protection information selected by the user based on the information provided by the database also needs to be saved as the basis for setting calculation. In addition, in order to have a good interaction with users, it is necessary to provide the query of the calculation results of the original protection setting, so that the setting value of the expanded equipment can be compared with the original setting value.