ABB 3BHE029594R1102 PPD239A1102 Excitation controller

The working principle of the PPD239A1102 excitation controller usually involves the following key steps:

Detection and measurement: First, the excitation controller detects the output voltage and current of the generator through the sensor. These sensors convert voltage and current signals into electrical signals, which are then sent to the controller.

Signal processing: After receiving these signals, the PPD239A1102 excitation controller will process these signals. According to the preset parameters and the set control strategy, the controller calculates the required excitation current.

Control signal output: Next, the controller sends the calculated excitation current signal to the excitation system. This signal is the key to controlling the size and direction of the excitation current.

Excitation system work: excitation system usually consists of an excitation transformer and an excitation power supply. The excitation transformer converts the low voltage signal sent by the controller into a high voltage signal, and then supplies the excitation power. The excitation power supply converts the high voltage signal into direct current and supplies it to the excitation coil of the generator.

Magnetic field generation and regulation: the excitation coil of the generator receives the direct current signal provided by the excitation power supply, and generates a constant magnetic field. This magnetic field changes with the excitation current, which in turn affects the output voltage and current of the generator. The PPD239A1102 excitation controller precisely controls the magnitude and direction of the excitation current to achieve accurate regulation of the output voltage and current of the generator.

Feedback and regulation: In order to maintain the stability of the generator output voltage and current, the PPD239A1102 excitation controller also uses a feedback mechanism. It constantly detects the actual output voltage and current of the generator and compares it with the preset values. If there is a difference, the controller adjusts the excitation current accordingly to achieve a stable output voltage and current.

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