A new distribution system state estimation using PV separation strategy

  • A new distribution system state estimation using PV separation strategy

Overview

Distribution system state estimation (DSSE) has been used extensively and applied in distribution network planning, control and operation. DSSE in active distribution systems is a challenging task due to demand and supply uncertainties. In addition, high integration of solar generation within the area will probably bias the DSSE since it violates the white noise assumption in all state estimation methods. this research intends to develop a new DSSE for distribution networks with limited measurement devices. This study makes use of a real dataset given by Energy Queensland in Australia to illustrate the efficacy of the proposed technique. The proposed PV-ACKF outperformed the conventional ACKF technique in distribution networks with high levels of photovoltaic (PV) generations.

Outcomes

A new PV-ACKF DSSE technique to improve the accuracy of the estimation.

Australian 23-bus distribution network
Voltage estimation using the conventional ACKF in network. (a) with no PV penetration (b) with high PV penetration level

Key features and advantages

Real-time results comparing ACKF (121 and PV-ACKF in the 23-bus test system. (a) bus 6, (b) bus 13, (c) bus 22

 

  • Developing the new PV estimation method based on differencing strategy.
  • Generating real-time pseudo measurements using the proposed scaling factors.
  • Proposing the new PV-ACKF DSSE technique to improve the accuracy of the estimator in areas with high rate of PV penetration.
  • Collaborating with Energy Queensland and using the real dataset for validation purposes.

 

Funding

Amount:

Duration:

Partners:

  • Energy Queensland