What is the difference between the integrated automation of the substation and the secondary system of
the traditional substation ? The difference from the secondary system of the traditional substation is that each protection, measurement and control unit remains relatively independent (for example, the relay protection device does not rely on communication or other equipment, and can be independent and reliable. Complete protection and control functions quickly, quickly remove and isolate faults); in the form of computer communication, mutual exchange of information' realizes data sharing, coordinates and cooperates, reduces cable and equipment configuration, adds new functions, and improves substation Safety and reliability of overall operation control.
What are the advantages of substations to achieve integrated automation?
Compared with the secondary systems of conventional substations, substations to achieve integrated automation can show unique advantages in the following aspects.
① High reliability of online operation. The integrated automation system of the substation can use software to realize online self-checking and has the function of fault diagnosis.
②High power supply quality. Since the integrated automation system of the substation includes voltage and reactive power automatic control functions, for substations with on-load tapping transformers and reactive power compensation capacitors, the voltage qualification rate can be greatly improved, and the main equipment and various electrical components of the power system can be guaranteed. The safety of the equipment makes the reactive power flow reasonable and reduces the network loss.
③Professional and comprehensive, easy to find hidden dangers, deal with accidents and restore power supply quickly.
④The automation level of substation operation management is high. After adopting integrated automation, these valuable data can be recorded in the historical database, and important data can be obtained from it when necessary, which can provide important basis for power dispatching and system planning. After the substation is automated, monitoring, measurement, recording, meter reading and other tasks are automatically carried out by the computer, which improves the accuracy of measurement and the level of operation management.
⑤Reduce control cables and reduce floor space. After the integrated automation of the substation is achieved, all data and signals can be shared by each part, so that a large amount of control cables can be saved. The integrated automation system of the substation adopts computer and communication technology, and the hardware circuit mostly adopts large-scale integrated circuit, which is compact in structure, small in size and strong in function.
⑥Easy to maintain and debug. Since each subsystem has the ability to self-diagnose faults in the integrated automation system, the maintenance time is shortened.
⑦Provides reliable technical conditions for the realization of unattended substations. The integrated substation automation system has powerful computer computing capabilities and logical judgment functions, which can easily monitor and control various equipment in the substation. For example, the meter reading and recording automation of the monitoring system eliminates the need for regular meter reading and recording to reduce the number of personnel on duty; if the communication function with the superior dispatcher is configured, it can also realize remote measurement, remote signaling, remote control, and remote adjustment.
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