Double-fed wind power plant sub-synchronous oscillation SVC suppression method and device

A technology of sub-synchronous oscillation and synchronous oscillation, applied in the field of electric power, can solve problems such as difficult to reflect the operating state of wind turbines, different operating states of wind turbines, and difficult selection of speed signals
CN108631332AActive Publication Date: 2018-10-09NORTH CHINA ELECTRICAL POWER RES INST +3
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
NORTH CHINA ELECTRICAL POWER RES INST
Publication Date
2018-10-09

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Abstract

The invention provides a double-fed wind power plant sub-synchronous oscillation SVC suppression method and device. The method comprises the following steps: acquiring a voltage signal, a current signal and wind power plant parameters of the double-fed wind power plant output end, wherein the wind power plant parameters comprise wind speed and power transmission line series compensation; ;determining an active power signal, a voltage oscillation amplitude and a current oscillation amplitude according to the voltage signal and the current signal; determining a work mode of a SVC controller; determining module parameters of the SVC controller according to the determined work mode, the voltage oscillation amplitude, the current oscillation amplitude, the oscillation frequency, the wind powerfield parameter and a pre-established SVC parameter table, wherein the SVC parameter table is the pre-established SVC function module parameter and system operation information corresponding table under different work modes; and performing sub-synchronous oscillation SVC suppression on the wind power field by using the SVC controller with determined parameter. The sub-synchronous band signal is filtered from a sampling signal, and the sub-synchronous oscillation SVC suppression is performed on the double-fed wind power plant by using the voltage and the active power.
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Description

technical field

[0001] The invention relates to electric power technology, in particular to a double-fed wind power field synchronous oscillation SVC suppression method and device. Background technique

[0002] As a clean energy source, wind power has been highly valued by countries all over the world, especially today when fossil energy is increasingly exhausted. The large-scale development and utilization of wind power has also become an important part of my country's energy strategy. my country's wind power technology started relatively late, but it has developed rapidly. The installed capacity of wind power has increased year by year, and the proportion of wind power in power supply has also increased rapidly. However, the areas rich in wind resources in my country are mainly concentrated in the three north regions, far away from the load center, and high-voltage long-distance power transmission has become an inevitable choice. Since the series capacitor compensation ca...

Claims

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