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Traditional automatic bus transfer methods have difficulty in correctly telling whether it is short-circuit fault or incoming line tripping by security and stability control devices which leads to bus voltage losing. It may cause automatic bus transfer device incorrect operation or refusing action, which effects the stable operation of the power system and reliability of power supply. This paper proposes...
A blackout model for hybrid AC/DC power systems is presented on the basis of self-organized criticality theory in this paper. The model considers the related operating characteristics of DC transmission system and the defending impact of security dispatch department during fault propagation, which takes AC/DC power flow calculation as its main tool to study the overall action characteristics of cascading...
Reactive power planning (RPP) involves numerous factors of uncertainty. In this paper, the cost of investment of reactive equipment is selected as objective function, which is based on the system security. And a method of multi-scenario processing is presented. Based on the balance of reactive power division, the model pursues the best scheme under the comprehensive optimal one which has probabilistically...
When sudden insufficient power supply occurs that will cause frequency drop quickly, and this could lead to a complete network collapse. Automatic generation control (AGC) is one of the important auxiliary services that play an important role in satisfying the large load changes or other disturbances, maintaining system frequency stability, keeping tie-line transaction security and enhancing the safety...
A comprehensive study has been performed to compute the voltage stability margin for Tri-State South Colorado area using EPRI power system voltage stability region (PSVSR) program. We determined the critical cut-sets to separate the weak region from the rest of the transmission network, calculated the voltage stability boundaries in cut-set state space, and investigated remedial action schemes.
With the rapid development of power systems in China, the voltage/reactive power control becomes more and more important. The hierarchical voltage control is proved as an effective method to ensure the security, stability and economy of power systems. A secondary voltage intelligent control method and implement based on the fuzzy expert system is proposed in the paper. In order to augmenting voltage...
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