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Engineering

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Electrical Engineering

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Steady-State Transmission Lines and Power Flows

Voltage and Reactive Power Control

Description

Voltage and reactive power control help keep a power system stable and efficient. In this topic, generator settings, switched equipment, and transformer taps work together to guide how power moves through the network.

A generator can be modeled with a Thevenin equivalent circuit under balanced st...

Transcript

控制功率流动需要管理诸如发电机原动机和励磁控制、并联电容器组、电抗器、静止无功补偿系统以及调压变压器等组件。

在稳态条件下,发电机可用戴维南等效电路表示,包括端电压、励磁电压、功角和同步电抗。

然后计算发电机的电流、有功功率和无功功率。

增大功角会提高有功功率,但会降低无功功率;而提高励磁电压则会增加无功功率,并略微减小功角。

在母线上加装并联电容器组可提高其电压,而并联电抗器则会降低电压。

有载调压变压器控制母线电压和无功功率流动。相角调节变压器控制母线相角和有功功率流动。

调节分接开关设置或电压调节会改变潮流计算程序所计算的变压器匝数比。

该程序还可评估切换线路、变压器、负荷和发电机的...