Abstract
Information between interconnected power systems is difficult to share in real time, due to trade secrets and technical limitations. The regional power grid cannot timely detect the impact of changes in the operation mode of the external power grid on the regional reliability, due to faults, load fluctuations, power generation plan adjustments, and other reasons. How to evaluate the reliability of a regional power system under the conditions of information isolation is a difficult problem for the security of interconnected power systems. Aiming at this problem, an operational reliability evaluation method for an interconnected power system is proposed herein, which does not depend on external network information directly, but only uses boundary phasor measurement unit (PMU) measurement data and internal network information. A static equivalent model with sensitivity consistency was used to simplify the external network to ensure the accuracy of the reliability calculation of interconnected power systems. The boundary PMU measurement data were used to update the external network equivalent model online. The algorithm flow of the operation reliability assessment for the interconnected power grid is given. The results of an example based on the IEEE-RTS-96 test system show that the proposed method can track the equivalent parameters of the external network without depending on the actual topological information, and calculate the reliability index of the internal network accurately.
Highlights
With the increase of global power consumption and the innovation of high-voltage transmission technology [1], there are no technical barriers for long-distance and wide-range power transmission [2,3]
Due to technical barriers and trade secrets, the actual topology and operational data of the network are difficult to share in real time among the power grids in different regions [27]
This paper proposes to replace the external network with the sensitivity consistent static equivalent (SCSE) model, and to update the SCSE model online with boundary phasor measurement unit (PMU), so as to evaluate the operational reliability of the internal network
Summary
With the increase of global power consumption and the innovation of high-voltage transmission technology [1], there are no technical barriers for long-distance and wide-range power transmission [2,3]. The interconnection of power systems in different regions has many advantages, such as promoting the consumption of renewable energy, reducing the dependence on fossil energy, reducing environmental pollution, adjusting the peak–valley difference of load, improving the reliability of power grids, and so on. While interconnected power systems bring significant benefits, they raise many problems. The synchronous condenser located at the boundary bus was out of operation, and the lines wasboundary validated bus using. The other data were identical with the original literature. The topology of condenser locatedThe at the boundary bus 14identical was out with of operation, and the lines 16–19 disconnected. The topology of condenser locatedThe at the boundary bus 14identical was out with of operation, and the lines 16–19 disconnected. disconnected.
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call