Operation Adjustment Framework based on Look-ahead Snapshots for Online Voltage Profile Optimization

The increase in integration of renewable energy sources and electricity system reform in Japan will increase generation uncertainty in power system. To handle the uncertainty and increase operation efficiency, the systems that optimize voltage profiles, such as the Optimized Performance Enabling Network for Volt/var(Q) (OPENVQ) proposed by the authors, are used. In this paper, an operation adjustment framework based on the look-ahead grid snapshot is proposed as an mechanism to adjust operations for the promotion of utilization the systems. As a specific application of the framework, we proposed a method to reduce bus line voltage deviations due to forecast errors. The evaluation was performed using data with errors between forecast demand and actual demand, and it was shown that the deviation avoidance rate was improved while maintaining the transmission loss reduction performance compared to the case where a uniform bus voltage margin was set for deviation avoidance. As another example of application of the framework, we proposed a method to reduce the amount of equipment operated for optimization. Compared to the method of periodically thinning out the equipment operation targets, it is shown that the equipment operation reduction rate is improved while maintaining the transmission loss reduction performance.