Power distribution device for improving active power of series electric tracer heating system

Abstract

The invention relates to a power distribution device for improving active power of a series electric tracer heating system, which is used for correcting reduced power of an underground long-distance pipeline due to electromagnetic inductance. The device comprises an electric control cabinet (2), a voltage-regulating transformer (3) and a power-regulating control cabinet (4), the electric control cabinet (2) and a power supply (1) are connected with the voltage-regulating transformer (3) which is connected with the power-regulating control cabinet (4), and the power-regulating control cabinet (4) is accessed into a load (5). The invention can improve the current of the load to a preset value by improving the secondary voltage of the voltage-regulating transformer and adding power regulators under the condition of no change of an actual system Q value, thereby achieving the purpose of improving active power.

Description

(1) Technical field [0001] The invention relates to an electric heat tracing system, in particular to a power distribution device for increasing the active power of a series electric heat tracing system. It is used to correct the power drop caused by electromagnetic induction in buried long-distance pipelines, and it can also be used for voltage compensation caused by undervoltage of existing electric heating devices. (2) Background technology [0002] The conventionally designed series electric heat tracing system is a three-phase star-shaped purely resistive load, so the voltage applied to the load terminal is designed to be used for pure impedance. According to Joule's law, the output electric work is all converted into heat energy. However, in the actual application process of the system, due to the existence of inductive reactance, the effective value of the load current becomes smaller, and only a part of the active power output is converted into heat energy. The modu...

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Problems solved by technology

When the designed series electric heat tracing system is used in long-distance buried pipelines, it is necessary to meet the construction requirements, and sometimes the three-phase series electric heating cables must be laid asymmetrically and passed through the pipes, because the pipes are generally made of carbon steel, and the electric heating cables When using three-phase alternating current, an electromagnetic field will be generated around, and the output active power of the electric heating system will be reduced due to the inductive reactance between the pipe passing through the pipe and the electric heating belt.

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