CN202034366U - Thyristor converter valve tower for high-voltage direct-current electricity transmission - Google Patents

Abstract

The utility model discloses a valve tower of a thyristor converter valve for high-voltage direct current transmission, which comprises an insulating support frame, and at least two valve modules and at least two reactors are arranged side by side at intervals in the vertical direction on the insulating support frame module, the thyristor converter valve valve tower also includes a water cooling system for cooling the valve module and the reactor module, the water cooling system includes a cooling water main pipeline and a cooling water pipeline, and the cooling water main pipeline is arranged around the corresponding On the outside of the valve module, the main cooling water pipe is provided with a cooling water pipe for guiding the cooling water to the valve module and the reactor module on the inner side of the main cooling water pipe ring, and the main cooling water pipe is connected to the corresponding valve module and the reactor module. There are gaps between the reactor modules. The utility model solves the problem of short circuit damage to the lower components and reduces the service life of the thyristor converter valve tower in the prior art when water leakage occurs in the water cooling system pipeline.

Description

Thyristor converter valve tower for HVDC transmission

technical field

The utility model relates to the field of electric power system converter valves, in particular to a thyristor converter valve tower for high-voltage direct current transmission.

Background technique

The thyristor converter valve tower is composed of several valve modules connected in series. The existing converter valve tower includes multiple valve modules and multiple reactor modules arranged side by side along the longitudinal direction of the insulating support frame. The valve modules are connected in series through a conductive plate. The conductive plate is located in the center of the valve modules. A water cooling system for cooling the valve modules is installed between adjacent valve modules. The water cooling system includes the main cooling water pipeline and the cooling water pipeline. The gap between adjacent valve modules constitutes the maintenance gap. Since the water cooling system is installed between adjacent valve modules, water leakage is the key factor affecting the safe operation of the converter valve. When the water cooling system on the upper part of the converter valve valve tower leaks, It will cause damage to the lower valve module and reactor module, reduce the service life of the valve tower of the thyristor converter valve, and due to the limitation of the maintenance clearance space, the shape of the water cooling system pipeline is not suitable for production, the processing is difficult, and the cost is increased. The conductive plate and the conductive plate are arranged in the gap between the adjacent valve modules, resulting in a very narrow maintenance gap and inconvenient maintenance. At the same time, the conductive plate is located in the center of the valve module, which makes the AC and DC outlets of the converter valve valve tower more troublesome and complicated to connect. .

Contents of the invention

The purpose of this utility model is to provide a thyristor converter valve valve tower for high-voltage direct current transmission, to solve the problem of short circuit damage to the lower components caused by the leakage of the water cooling system pipeline in the existing thyristor converter valve valve tower, reduce the The service life of thyristor converter valve tower.

In order to solve the above problems, the technical solution of the utility model is:

The thyristor converter valve tower for high-voltage direct current transmission includes an insulating support frame, and at least two valve modules and at least two reactor modules are arranged side by side at intervals in the vertical direction on the insulating support frame, and the thyristor converter The flow valve valve tower also includes a water cooling system for cooling the valve module and the reactor module. The water cooling system includes a cooling water main pipeline and a cooling water pipeline. The cooling water main pipeline is arranged around the Corresponding to the outside of the valve module, the cooling water main pipeline is provided with a cooling water pipeline for guiding the cooling water to the valve module and the reactor module in the direction toward the inner side of the cooling water main pipeline ring, and the cooling water There is a gap between the main pipe and the corresponding valve module and reactor module.

The insulating support frame includes insulating screw rods arranged side by side along the vertical direction.

The valve tower of the thyristor converter valve further includes conductive plates for connecting adjacent valve modules in series, and there are at least two conductive plates, which are respectively arranged outside the corresponding valve modules.

A maintenance platform is provided between adjacent valve modules on the insulating support frame, and an insulating ladder for leading to the maintenance platform is provided at one end of the maintenance platform.

The two ends of the valve tower of the thyristor converter valve along the vertical direction are respectively provided with a bottom shield and a top shield.

The beneficial effects of the utility model are: the utility model surrounds the thyristor of the valve module in the thyristor converter valve valve tower and the cooling water main pipe of the auxiliary components from top to bottom on the outside of the corresponding valve module, and the cooling water The main pipeline is provided with a cooling water pipeline for guiding the cooling water to the valve module and the reactor module in the inner direction of the cooling water main pipeline ring, and the cooling water main pipeline is connected to the corresponding valve module and the reactor module. There is a gap, because the main cooling water pipe and the cooling water pipe are arranged on the outside of the valve module and the reactor module, when the water leakage occurs in the main cooling water pipe and the cooling water pipe, the leakage will not affect the corresponding valve module and reactor below The module causes a short-circuit hazard and improves the service life of the valve tower of the thyristor converter valve.

Description of drawings

Fig. 1 is a schematic structural view of an embodiment of the utility model.

Detailed ways

An embodiment example is shown in Figure 1: a thyristor converter valve tower for high-voltage direct current transmission, the thyristor converter valve valve tower includes an insulating support frame 3, and the insulating support frame 3 includes parallel arrangement along the length direction of the thyristor converter valve valve tower Insulating screw 10, at least two valve modules 11 and reactor modules 7 are arranged side by side at intervals along the vertical direction on the insulating support frame 3, and the valve tower of the thyristor converter valve also includes a water cooling system for cooling the thyristor and auxiliary components , the water-cooling system includes a cooling water main pipeline 12 and a cooling water pipeline 13, the cooling water main pipeline 12 is arranged around the outside of the corresponding valve module 3 from top to bottom, and the cooling water main pipeline 12 faces the cooling water main pipeline 12 On the inner side of the ring, there is a cooling water pipeline 13 for guiding the cooling water to the valve module 11 and the reactor module 3 and is connected with the cooling water pipeline 13. The reactor module 7 is arranged on the outside of the corresponding valve module 11, and the cooling water is mainly There is a gap between the pipeline 12 and the corresponding valve module 11 and the reactor module 7. In this embodiment, the cooling water main pipeline 12 in the width direction of the valve module 11 is a stainless steel pipe, and the cooling water in the length direction of the valve module 11 The main water pipe 12 is a PVDF water pipe, and the valve tower of the thyristor converter valve also includes a conductive plate 4 for connecting adjacent valve modules 11 in series. There are at least two conductive plates 4 and they are respectively arranged on the corresponding valve modules 11 On the outside of the valve module 11, the conductive plate is arranged on the outside of the valve module 11, which can easily realize the AC and DC outlets of the valve tower of the thyristor converter valve. In this embodiment, the conductive plate 4 is a conductive aluminum plate. In other embodiments of the utility model, The conductive plate 4 can also be a conductive copper plate, and the insulating support frame 3 is provided with a maintenance platform 6 between adjacent valve modules 11 and one end of the maintenance platform 6 is provided with an insulating ladder 9 leading to the maintenance platform 6, and the thyristor commutation The two ends of the vertical direction of the valve tower are respectively provided with a bottom shield 5 and a top shield 1, and the pipes of the water cooling system are arranged outside the valve module 11, and only large arc bending is required, which simplifies the processing difficulty of the pipes , reduces the cost, and more importantly, it can avoid the short-circuit hazard caused by the leakage of the upper pipe of the thyristor converter valve valve tower to the lower valve module 11 and the reactor module 7, which improves the service life of the thyristor converter valve valve tower. At the same time, the conductive plate 4 is arranged on the outside of the corresponding valve module 11, which also increases the gap between adjacent valve modules 11, so that the components of the valve tower of the thyristor converter valve can be easily repaired and replaced.

Claims (5)

1. A thyristor converter valve valve tower for high-voltage direct current transmission, including an insulating support frame, on which at least two valve modules and at least two reactor modules are arranged side by side at intervals in the vertical direction, and the The valve tower of the thyristor converter valve also includes a water cooling system for cooling the valve module and the reactor module, and the water cooling system includes a cooling water main pipeline and a cooling water pipeline, and it is characterized in that: the cooling water main pipeline is composed of It is arranged on the outside of the corresponding valve module from top to bottom, and the cooling water pipe for guiding the cooling water to the valve module and the reactor module is arranged on the inner side of the main cooling water pipe ring. , there is a gap between the main cooling water pipe and the corresponding valve module and reactor module. 2 . The thyristor converter valve tower for HVDC power transmission according to claim 1 , wherein the insulating support frame includes insulating screws arranged side by side along the vertical direction. 3 . 3. The thyristor converter valve tower for HVDC power transmission according to claim 1, characterized in that: said thyristor converter valve tower also includes a conductive plate for connecting adjacent valve modules in series , there are at least two conductive plates and they are respectively arranged on the outside of the corresponding valve modules. 4. The thyristor converter valve tower for HVDC power transmission according to claim 1, characterized in that: a maintenance platform is provided between adjacent valve modules on the insulating support frame, and the maintenance platform One end is provided with an insulated ladder for leading to the maintenance platform. 5. The thyristor converter valve tower for high-voltage direct current transmission according to any one of claims 1 to 4, characterized in that: the two ends of the thyristor converter valve tower along the vertical direction are respectively A bottom shield and a top shield are provided.

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