Abstract
The distribution grid is undergoing profound changes nowadays, and state estimator has become an essential part in the control room to enable future smart grid. The newly deployed micro phase measurement units ( $\mu $ PMU) and advanced metering infrastructure (AMI) devices make the real-time state estimation possible for distribution system. Therefore, this paper studies the incorporation and process of the multi-source measurements and proposes a fast three-phase state estimation based on the hybrid measurements scheme. By the process of $\mu $ PMU measurements, pseudo voltage measurements are added, which significantly increases the estimation redundancy. For AMI measurements, the harmonic components model is used to overcome the asynchronicity problem. An improved sequential state estimation based on the changed measurements is proposed to enable a fast estimation. IEEE 13-node and 390-node systems are simulated to verify the efficacy and efficiency of the proposed method.
Highlights
Power system operating states can be classified into three possible scenarios, namely normal, emergency and restorative, as the operating conditions change
The test version of the proposed method is implementing in one district of Guangzhou, a southern city of China
There are some shortcomings of the proposed method which need to be improved in the future
Summary
Power system operating states can be classified into three possible scenarios, namely normal, emergency and restorative, as the operating conditions change. State estimation has been an essential part of the energy management system (EMS) in high-voltage level power transmission system for decades. This is not the case for distribution power system. He et al.: Hybrid Measurements-Based Fast State Estimation for Power Distribution System. 2) An improved sequential DSSE based on changed measurements is proposed, which enables fast state estimation. The method enables decoupled Jacobian Matrix on a phase basis and is computationally efficient for radial and weakly meshed networks After this novel method, successive efforts either dedicate to refine the original methodology or use it for other applications, e.g., topology processing [12], [13]. In this paper, the bus voltage at the other end of the line (the line is connected to the bus where μPMU is installed) is calculated as pseudo-measurement
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