#相间变压器

Interphase Transformers, a specialized type of transformer, serve the purpose of transferring electrical energy from one phase to another within a power system. They play a crucial role in facilitating the conversion and transmission of energy between different phases. These transformers are commonly employed in high-voltage transmission systems and industrial power applications, each serving unique functions and classifications.

1. What are Interphase Transformers?
   Interphase Transformers represent a distinct category of transformers designed specifically for phase conversion and energy transmission. Comprising two or more independent windings, each winding is connected to a different phase of the power supply system. This configuration allows for the conversion of energy between different phases, thereby fulfilling the phase requirements within the power system. Typically utilized in three-phase power supply systems, each phase is associated with an individual winding. Adjusting the parameters of these windings, such as turns ratio and current ratio, facilitates the required phase conversion function.

2. Functions and Classifications of Interphase Transformers
   2.1 Functions of Interphase Transformers:
   Interphase Transformers fulfill critical functions within power systems, including:

• Phase Conversion: Enabling the transfer of energy from one phase to another, facilitating phase conversion within power systems, particularly in transmission and distribution systems.
• Power Balancing: Interphase Transformers assist in balancing power between different phases. In instances of excessive load or faults in one phase, adjusting the parameters of the Interphase Transformer helps balance power loads, ensuring system stability.
• Phase Sequence Correction: These transformers can also correct phase sequences. In cases where phase sequence errors or inconsistencies occur within the power system, adjustments made using Interphase Transformers restore the normal phase relationships between system phases.

2.2 Classifications of Interphase Transformers:
Interphase Transformers can be categorized based on their structure and applications:

• Directly Connected Type: The most common type, Directly Connected Interphase Transformers consist of multiple independent windings, each connected to different phases and coupled magnetically through a common core. They are typically used for phase conversion and energy transmission in power systems.
• Isolation Type: Also known as Interphase Isolation Transformers, they feature multiple independent windings, each connected to different phases, but without direct magnetic coupling between windings. Isolation Type Interphase Transformers are primarily used to isolate different phases within power systems and provide additional safety protection.
• Autotransformer: A special type of Interphase Transformer where two or more windings share a portion of turns. Autotransformers facilitate energy conversion between different phases and are also used for voltage regulation and power control applications.

3. Measuring Interphase Voltage in Transformers
   To measure the interphase voltage in transformers, appropriate measuring devices such as voltmeters or voltage sensors are typically used. The following are general steps for measuring interphase voltage in transformers:

• Ensure Safety: Before conducting any voltage measurements, take appropriate safety precautions, such as wearing insulated gloves and personal protective equipment, and ensure that instruments and circuits are in a safe condition.
• Select Suitable Measuring Device: Based on requirements, select the appropriate voltmeter or voltage sensor capable of withstanding the voltage range being measured, with sufficient accuracy and sensitivity.
• Connect Measuring Device: Properly connect the selected measuring device to the two phases of the transformer. Ensure correct and secure connections with other parts of the circuit.
• Measure Voltage: Turn on the measuring device and record the interphase voltage value of the transformer. During the measurement process, observe the instrument readings to ensure stability.
• Turn off Measuring Device: After completing the measurement, turn off the measuring device and disconnect it from the circuit. Exercise caution throughout the operation to prevent accidents.
  It is important to note that before conducting any voltage measurements, carefully read and adhere to relevant safety operating procedures and standards. Additionally, if unfamiliar with the power system or measurement process, seek assistance from professional technical personnel.

In summary, Interphase Transformers are specialized transformers designed to facilitate the conversion and transmission of electrical energy between different phases within a power system. Their functions include phase conversion, power balancing, and phase sequence correction. Based on their structure and application, they are classified into Directly Connected, Isolation, and Autotransformer types. To measure interphase voltage in transformers, select suitable measuring devices and follow proper procedures while prioritizing safety and accuracy.