Products Description
In order to achieve the best selection of post insulators for different substation applications, different technical parameters need to be considered.Specifically, the important factors to consider when optimizing the size and dimensions of the rear insulator are mechanical, electrical, environmental, functional and economic.
This is the one we offered to our client in Jordan earlier.
Post insulators are generally made of insulating parts and metal accessories (such as steel legs, iron caps, flanges, etc.) glued together with adhesives or mounted with mechanical clips.According to the structure of the insulator, it can be divided into three types: outer, inner and combined.
Different types of composite post insulators have different functions, structure height and creepage distance are also different.Composite post insulator is mainly used in transformer substation, has the good hydrophobic, aging resistance, resistance to tracking and electrical erosion resistance, high tensile strength and bending strength of its high mechanical strength, shock resistance, shock and the brittle fracture performance good, small volume, light weight (only for porcelain insulator with voltage grade 1/6 ~ 1/9).The structure is light and lightweight, easy to transport and install.The installation dimensions of the upper and lower ends are the same as those of the corresponding porcelain post insulators, and can be used interchangeably.
Wuhan Line Power was established in 2008.
Its main function is to service the electrical industry by supplying polymer insulator and raw materials to various contractors, municipalities, electrical power company or agent and other institutions locally and abroad. Situated in Wuhan city，Hubei province in China makes it easily accessible from all main centres and deliveries are also easily executed.
With an aim to establish our strong presence across global markets, we have been winning the hearts of customers by providing them with high quality electrical overhead transmission line materials suited their requirements and budget. Incorporated in 2008, we, Wuhan Line Power, are known as a renowned manufacturer, trader and supplier of composite insulator. In addition, we also offer , Lighting Arresters and metal fittings.
Products Description
Features and functions of converter station equipment
The converter station is a system for mutual energy conversion between DC and AC in a DC transmission project. In addition to the same equipment as the AC substation, such as the AC field, the DC converter station also has the following unique equipment: converters, converter transformers, AC DC filter and reactive power compensation equipment, smoothing reactor. The main function of the converter is to convert AC to DC. From the initial mercury arc valve to the electric control and light control thyristor valve, the unit capacity of the converter is constantly increasing.
The converter transformer is the key equipment for AC-DC conversion in the DC converter station. Its grid side is connected to the AC field, and its valve side is connected to the converter. Therefore, the valve side windings need to bear the combined stress of AC and DC. Since the operation of the converter transformer is closely related to the nonlinearity caused by the commutation of the converter, it has different characteristics from ordinary power transformers in terms of leakage reactance, insulation, harmonics, DC bias, on-load voltage regulation and testing.
The AC-DC filter provides a path to the ground for the characteristic harmonics generated during the operation of the converter. A large number of harmonics are generated during the operation of the converter, which consumes 40% to 60% of the reactive power of the converter capacity. AC filters also provide reactive power while filtering. When the reactive power provided by the AC filter is not enough, special reactive power compensation equipment is also required.
The smoothing reactor can prevent the DC side lightning and steep waves from entering the valve hall, so that the converter valve is not subject to the stress of these overvoltages; it can smooth the ripple in the DC current. In addition, the smoothing reactor can also reduce the probability of commutation failure by limiting the rapid change of current when the DC is short-circuited.
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