Remote Control of Electrical Installation Power Source Synchronization
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Solution Overview
Problem
Current methods for periodic maintenance of electrical substation auxiliary power sources require on-site operator intervention and temporary power interruptions, leading to logistical challenges and disruptions in electrical supply.
Innovation Solution
A remote control method for electrical installations that synchronizes and switches between main and auxiliary power sources without interrupting priority loads, using a remote control station to start and synchronize auxiliary generators, ensuring compatibility of electrical quantities before switching, and allowing for remote verification and correction of parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic maintenance is performed by cutting off the main network and starting the auxiliary generator on-site, then the auxiliary power source can be verified to be operational, but the electrical supply to loads must be interrupted and operators must be present on-site
Solution Approach 1:
The auxiliary generator is configured to start automatically and synchronize with the main network without requiring manual intervention. The system performs self-verification of operational status through automatic monitoring of synchronization parameters (frequency, voltage, phase), eliminating the need for operators to be present on-site during maintenance verification.
Solution Approach 2:
The system performs preliminary synchronization checks and automatic starting sequences before any potential switchover is needed. By pre-verifying the auxiliary generator's operational status through automatic testing and synchronization attempts, the system ensures readiness without interrupting main network supply or requiring on-site personnel.
2Reliability
If the auxiliary generator is started and synchronized with the main network, then the switchover capability can be verified, but the electrical quantities (frequency, voltage, phase) must be made compatible which requires time and coordination
Solution Approach 1:
The system continuously monitors electrical quantities (frequency, voltage, phase angle) of both the main network and auxiliary generator, providing real-time feedback to the control system. This feedback enables automatic adjustment of generator parameters to match the main network, reducing the time required for synchronization and verification of switchover capability.
Solution Approach 2:
The patent replaces manual mechanical synchronization procedures with an automatic electronic control system that uses sensors and actuators to adjust generator parameters. This substitution of mechanical operator actions with automated electronic control significantly reduces the time required for synchronization and verification.
3Reliability
If loads are shed and switched between main network and auxiliary generator during maintenance, then the auxiliary source can be tested, but there are two successive interruptions in power supply to loads
Solution Approach 1:
The system maintains continuous power supply to loads during auxiliary generator testing by keeping the main network connected throughout the verification process. The auxiliary generator is tested and synchronized in parallel with the main network, allowing validation of switchover capability without interrupting the continuous supply to connected loads.
Solution Approach 2:
The control system acts as an intermediary that coordinates the operation of both main network and auxiliary generator. It manages the synchronization process and monitors electrical parameters, enabling the auxiliary source to be tested while the main network continues to supply power to loads, thus avoiding direct interruption.
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a method of controlling an electrical installation from a remote control station, the electrical installation comprising a coupling network 5 supplying one or more loads 7, 8, a main switch 13 for connecting a main power source 10 to the coupling network 5 and an auxiliary switch 23 for connecting an auxiliary power source 20 to the coupling network 5, for the purpose of periodic preventive maintenance.The control process includes a first step of synchronizing the auxiliary source 20 with the main source 10 comprising a phase of measuring electrical quantities relating to the main source and the auxiliary source and a phase of verifying, from the remote control station, that the measured electrical quantities of the main source and the auxiliary source are compatible, a step of sending a command to close the auxiliary switch 23 from the remote control station, a step of sending a command to open the main switch 13 from the remote control station and a step of checking, from the remote control station, that the load(s) 7, 8 are correctly supplied by the auxiliary source.