JPS62158307A - Shunt reactor - Google Patents

Abstract

PURPOSE:To contrive simplifying a power source installation by using the voltage induced in the secondary winding, which is wound around an iron core leg and positioned between the iron core leg and a winding, as the power source for an installation station. CONSTITUTION:A secondary winding 6 is wound around an iron core leg 3 and positioned between the iron core leg 3 and a winding 4, and the voltage induced in the secondary winding 6 is used as the power source of an installation station. A hunt reactor 1 to be preferably used is one which is always used by being connected to a system route such as one for compensating the capacity of charging a cable. On the other hand, the secondary winding 6 can also be used for the electrostatic shielding material of the iron core leg 3 against the high voltage winding 4. In this case, it is desirable to make the surface of the secondary winding 6 as smooth and cylindrical as possible.

Description

[Detailed description of the invention] (Industrial application field) This invention relates to shunt reactors.

(Prior Art) As is well known, shunt reactors are widely used, for example, as a means of supplying delayed phase reactive power to power systems.
It usually consists of individual windings wound around core legs with magnetic air gaps. By the way, these shunt reactors are normally installed and used in substations, etc., but substations are equipped with various types of electrical equipment in addition to the shunt reactors, so it is necessary to Power is required.

Conventionally, these power sources were either provided with in-house transformers or connected to a separate power source. However, all of these configurations increase equipment costs and construction costs, and are not very desirable.

(Problems to be Solved by the Invention) The object of the present invention is to simplify power supply equipment in substations and other facilities equipped with shunt reactors.

(Means for Solving the Problems) The present invention provides a shunt reactor in which a reactor winding is wound around an iron core leg having a magnetic air gap, in which a coil for a reactor is wound between the core leg and the winding. A secondary winding is wound around the core leg, and the voltage induced in the secondary winding is used as a power source for the equipment.

(Example) An example of the present invention will be described with reference to the drawings. 1 shows a shunt reactor according to the present invention, which is constructed by winding a winding 4 around a core leg 3 having a magnetic gap 2. 5 is a yoke core surrounding the winding 4. These structures are not particularly different from conventional shunt reactors of this type.

According to this invention, the secondary winding 6 is wound around the core leg 3 so as to be interposed between the core leg 3 and the winding 4. The voltage induced in the secondary winding 6 is used as a power source for the facility.

It is preferable that the shunt reactor used here be one that is always connected to the system line, such as one for cable charging capacity compensation. The figure shows a single-phase structure, but it may also be a three-phase structure (
In that case, it can be used as a three-phase power supply.

In the example shown, the cooling device for the shunt reactor, such as fan 7
The figure shows the case where it is used as a power source when a power supply is provided. It is also used as a power source for the control device 8 of the fan 7. In these cases, the secondary winding 6 may be of low voltage and small capacity. The usage of the power supply is not limited to this example; for example, if the capacity of the secondary winding 6 is several hundred kVA or more, it can also be used as a power supply for other general electrical equipment.

On the other hand, since the secondary winding 6 is interposed between the core leg 3 and the winding 4, the core leg 3 can also be used as an electrostatic shield for the high voltage winding 4. In this case, in order to make this electrostatic shielding function effective, it is desirable that the surface of the secondary winding 6 be as smooth and cylindrical as possible. According to this, the structure of the shunt reactor itself can be simplified, which is convenient.

(Effects of the Invention) As detailed above, according to the present invention, by simply winding the secondary winding in addition to the reactor winding around the iron core leg, it is possible to install the It is now possible to provide power for each electrical device, simplifying the conventional work required to install transformers or bring in other power sources, saving equipment costs, etc.
This has the advantage that the secondary winding can also be used for electrostatic shielding of the iron core leg with respect to the reactor winding.

[Brief explanation of drawings]

The figure shows an embodiment of the invention and is a sectional view also showing a circuit. 1... Shunt reactor, 3... Iron core leg, 4... Winding wire, 6... Secondary winding, 7... Fan.

Claims (1)

[Claims] In a shunt reactor in which a reactor winding is wound around a core leg provided with a magnetic air gap, an induced voltage is applied to the core leg in the shunt so as to be interposed between the core leg and the winding. A shunt reactor wrapped with a secondary winding to provide a power source for the facility where the reactor is installed.