Impact Of New-Type Synchronous Condenser On Voltage Stability Of Jarud Sending-End System
2018 INTERNATIONAL CONFERENCE ON POWER SYSTEM TECHNOLOGY (POWERCON)(2018)
Abstract
With the construction and development of UHVDC transmission system, the problem of insufficient dynamic reactive power reserve of the power grid is becoming increasingly prominent. As a typical UHVDC weak sending side, the short-circuit capacity of Jarud sending-end system is small, which causes high pressure on voltage stability in short-term failures. The introduction of new-type synchronous condensers will effectively improve the power system voltage stability. In this paper, Lugu UHVDC system is investigated. Firstly, the general situation of Jarud sending-end system and the demands for dynamic reactive power compensation are introduced. Then, the technical characteristics of the new-type condenser are analyzed starting from the performance improvement on subtransient, transient and steady state. Finally, simulation models of the condenser and Lugu UHVDC transmission system are built in PSCAD/EMTDC and are used to demonstrate. The effects of the new-type condenser on the system voltage are simulated and verified under the AC-side short circuit, the commutation failure and the bipolar blocking. And the impact of condenser on voltage stability of sending-end system is analyzed.
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Key words
Condenser, UHVDC, Reactive Power Compensation, voltage stability
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