遵义干式变压器：电抗器概述和铁心的型式

电抗器概述和铁心的型式 　　
1.概述
具有一定电感值的电器，通称为电抗器。具有大的电感量的线圈可以储能，作为瞬时放电的能源；有交直流励磁的铁心电抗器可作为功率放大器；在超高压输电系统中广泛应用并联电抗器，补偿翰电线的电容电流，防止线端电压升高，使线路的传输能力和效率提高，并使系统的操作过电压有所降低。
并联电杭器就是并联连接在系统上的电抗器，主要用以补偿电容电流。
限流电抗器就是串联连接在系统上的电抗器。在系统发生故障时，用以限制电流。
中性点接地电抗器就是连接在系统的中性点和大地之间的单相电抗器，当系统发生接地故障时，用以限制接地电流。
阻尼电抗器是指与电容器组串联连接的电抗器，用以限制遵义干式变压器操作时的涌流。
调谐电杭器或滤波电抗器是与电容器组串联或并联连接，用以降低、阻断或过滤谐波或通信频率。
消弧电抗器是指接于系统中性点和大地之间的单相电抗器，用以补偿因系统发生单相接地故障引起的接地电容电流。
平波电抗器是在直流系统中，用以减少谐波电流和暂态过电流的电抗器。
接地遵义干式变压器也可归属在电抗器内，因为接地遵义干式变压器(中性点藕合器)是并联连接在系统上的三相遵义干式变压器或电抗器，以提供一个中性点，当然接地遵义干式变压器可为近区辅助网络供电。

根据铁心的型式，电抗器可分以下三类：
(1)空心电抗器，空心电抗器只有绕组而中间无铁心。是一个空心的电感线圈。如限流电抗器，分裂电杭器，遵义干式变压器、低压遵义干式变压器和接触器等型式试验用的试脸电抗器，以及串联在高压输电线路上的阻波器。
(2)有气隙的铁心电抗器，带气隙的铁心往外面套有绕组，如并联电杭器、消弧电抗器、大型电动机的降压起动电抗器、整流用平波电抗器、用匹配电抗器、三相均衡电流用的均流电抗器。
(3)铁心电抗器，磁路是一个闭合的铁心回路，如双星形联结的整流用的平衡电抗器、调压和调功率用的饱和电抗器、动圈式的谐振电抗器等。
电抗器的型号有：NK—限流电抗器；FK—分裂电抗器；BK—并联和饱和电抗器；LK—平波电扰器；QK—起动电杭器；CK—串联电抗器；X—消弧电杭器。
目前，我国在40多年生产铁心电杭器和线路阻波器（通信用)的基础上，推出了环氧玻纤维包封多层干式空心电抗器。它采用干式空心结构，避免了油浸电抗器漏油、易燃的缺点、具有维护简单、运行较可靠的优点。没有铁心，役有磁饱和问题，电抗值不随电流而变化，线性度好。线圈外部由环氧树脂浸透的玻璃纤维包封，高温固化，整体性强，嗓声低，机械弧度是铜、铝的几倍，提高了对短路电流冲击的耐受性。且采用多层并联绕组结构，层间有通风道，外形小。冷却好.它还采用铝合金星形吊臂结构，机械强度高，涡流小。所有接头全部焊接到上下星形吊臂上，一般不用螺栓连接，以保证高可靠性.
小容量电抗器三相可垂直布置，大容量电抗器可以采用地面上华盈非晶合金变压器有限公司“品”字成“一”字水平布置。电抗器可带抽头或连续可调，电感变化为5%或更多。电扰器外表面涂以三层抗紫外线、抗老化的绝缘漆。

Overview of the reactor and core type

1 Overview
Appliances, has a certain inductance value known as the reactor. Has a large inductance of the coil energy storage, as the energy of the instantaneous discharge; AC and DC excitation core reactor as a power amplifier; widely used in the EHV transmission system shunt reactors, compensation the Han wire capacitance current to prevent line terminal voltage increases, the line transmission capacity and efficiency, and operation of the system over-voltage is decreased.
The parallel electric Hangzhou is the parallel reactor connected on the system, mainly to compensate for the capacitive current.
Limiting reactor in series reactor connected to the system. To limit the current in the event of a system failure.
Single-phase reactor neutral grounding reactor is connected between the neutral point and earth, when the system is a ground fault occurs, to limit the ground current.
Damping reactor is a reactor connected in series with a capacitor bank to the inrush current when the limit switch operation.
The tuning electric Hang or filter reactor in series with the capacitor banks connected in parallel to reduce the blocking or filtering of harmonics or communication frequency.
The arc reactor is connected between the neutral point and earth single-phase reactor to compensate for the phylogenetic single-phase ground fault caused by a grounded capacitor current.
Smoothing reactor is to reduce the harmonic current and transient current reactor in the DC system.
Grounding transformer can also be vested in the reactor, because of the grounding transformer (neutral point of coupling) is connected in parallel on a system of three-phase transformers or reactors, in order to provide a neutral point, of course, the grounding transformer for nearly District Auxiliary Network power supply.

Core type, the reactor can be divided into three categories:
(1) air-core reactor, hollow reactor only winding the middle core. Is a hollow inductor coil. Such as test face reactors, current limiting reactors, of separatist electric Hang, circuit breakers, low voltage switches and contactors and other types of test series in the traps of the high-voltage transmission lines.
(2) gapped core reactor with air gap the core Wangwaimian sets have windings, such as the step-down of the the shunt Hangzhou, the arc reactor, large motor starting reactor, rectifier smoothing power reactor, electric furnace match reactors, three-phase balanced current flow reactor.
(3) core reactor, magnetic core loop is a closed, such as binary star-shaped links rectifier balance reactor, voltage regulator and power modulated saturable reactor, the moving coil of the resonant power reactors and so on.
Reactor Model: of NK-limited flow reactor; the FK-split reactor; BK-parallel and saturated electric anti-device; the LK-level wave electrical interference device; QK-start electric Hang device; of CK-series reactors; the X- The arc suppression electric Hang device.
At present, China in 40 years of production the core Hang device and line traps (communication) on the basis of the introduction of the epoxy glass fiber encapsulated multilayer dry-type air-core reactor. It uses a dry hollow structure to avoid the spill of oil-immersed reactors, flammable shortcomings, easy maintenance, and run more reliable. No core, the existing magnetic saturation reactance value changes with the current, good linearity. Coils external soaked glass fiber by epoxy encapsulation, high temperature curing, strong integrity, my voice is low, the mechanical curvature of copper, aluminum, several times, to improve the tolerance of the impact of short-circuit current. And multi-layer structure of the parallel winding, air duct between the layers, small form factor. Cooling. It also features aluminum alloy star-shaped boom structure, high mechanical strength, and small eddy. All joints are all welded to the boom of the upper and lower star, generally do not bolted connections to ensure high reliability.
The small-capacity reactors three-phase vertical layout, large-capacity reactors can be used on the ground "goods" into "one" level layout. The reactor can be tapped or continuously adjustable inductance change of 5% or more. The electric scrambler exterior topcoat to the three-tier anti-ultraviolet aging of insulating paint.

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