Schemes of breaking electromagnetic loop networks for Anhui Power Grid during 2008～2015;

A general decision strategy for opening electromagnetic loop networks is proposed with consideration of power system security,short ciricuit capacity,economy and management requirements as well as planning constraints.

This paper discusses current situations of the 500 kV/ 220 kV electromagnetic loop network operation in Anhui power grid,and countermeasures adopted for improvement of the safety and stability.

The problem of 500/220 kV electromagnetic ring network function becomes more and more serious.

It s feasible that hydropower be transmitted with500kV and220kV voltage,and it s necessary to ensure the power network security and stability with500kV/220kV high/low voltage electromagnetic ring networks.

Fuzzy comprehensive evaluation of opening schemes for 500 kV-220 kV electromagnetic loop;

Dispatching strategies for 500 kV/220 kV electromagnetic loop networks and case analysis for Zhejiang Power Grid;

500 kV～220 kV electromagnetic loop of Jiangxi Power Grid in 2009

Research of opening up the electromagnetic ring to operation;

In the planning of urban power network, the electromagnetic ring problem should be dealt with scientifically to ensure the coordinational development of 500 kV and 220 kV power networks.

The stability problem with the electromagnetically coupled power loop between Chenjiaqiao and Changshou, situated in the transmission path from Sichuan to East China is analyzed.

Taking the Chenjiaqiao Changshou electromagnetically coupled power loop as an example, which is the main channel for sending Sichuan power eastward, the necessity of contingency analysis of the tripping of line without fault and single line permanent ground (SLG) fault on UHV line prescribed in the Guideline on Security and Stability for Power System is analyzed.

The electromagnetically coupled power loop is a particular form of network configuration in the development of Power Grid.