WO2016026469A1

WO2016026469A1 - Converter valve assembly cooling system

Info

Publication number: WO2016026469A1
Application number: PCT/CN2015/091025
Authority: WO
Inventors: 丁峰峰; 刘磊; 方太勋; 张翔; 陈赤汉; 黄华; 孙健; 杨帆; 张子敬
Original assignee: 南京南瑞继保电气有限公司
Priority date: 2014-08-22
Filing date: 2015-09-29
Publication date: 2016-02-25
Also published as: CN104201161A; CN104201161B

Abstract

Disclosed is a converter valve assembly cooling system. The assembly consists of cooling elements and heating elements arranged alternatingly in interval. The assembly at least comprises two cooling elements and one heating element. The cooling system comprises at least two coolant transport channels. With all of the cooling elements arranged in order, the first channel flows into the first odd-numbered cooling element, and connects serially to other odd-numbered cooling elements in ascending order, and flows out of the last odd-numbered cooling element, and the second channel flows into the last even-numbered cooling element, and connects serially to other even-numbered cooling elements in descending order, and flows out of the first even-numbered cooling element; alternatively, with all of the cooling elements arranged in order, the first channel flows into the first even-numbered cooling element, and connects serially to other even-numbered cooling elements in ascending order, and flows out of the last even-numbered cooling element, and the second channel flows into the last odd-numbered cooling element, and connects serially to other odd-numbered cooling elements in descending order, and flows out of the first odd-numbered cooling element.

Description

Converter valve assembly cooling system

Technical field

The present invention relates to a power electronics cooling system, and more particularly to a power electronic device based converter valve assembly cooling system.

Background technique

The converter valve is the core component of power electronics. During operation, the power electronics and damping resistors in the converter valve generate a large amount of heat. If the heat dissipation is not obtained, the operating temperature of the converter valve will be too high. Overall performance and even damage to the converter valve. Therefore, the converter valve must be equipped with a corresponding cooling system to exchange the heat generated by the internal components to operate within a reasonable temperature range.

Since there are multiple components in the converter valve that need to be cooled, the internal cooling circuit arrangement has a great influence on the heat dissipation effect and system reliability. The existing cooling system has poor heat dissipation effect on the components in the converter valve, and the system reliability is not high.

Summary of the invention

It is an object of the present invention to provide a converter valve assembly cooling system to improve the heat dissipation of components within the converter valve and the reliability of the cooling system.

In order to achieve the above object, the solution of the present invention is:

A converter valve assembly cooling system, the assembly comprising a cooling element and a heating element arranged in sequence at intervals, the assembly comprising at least two cooling elements and a heating element, the cooling system comprising at least two coolant delivery a branch road, the first branch flows from the odd-numbered portions of the cooling elements arranged in sequence, and sequentially flows up the odd-numbered partial cooling elements in series, from the last one of the odd-numbered portions, and the second branch sequentially arranges the even-numbered portions of the cooling elements. Inflow only, descendingly serially connecting even-numbered partial cooling elements, flowing out from the even-numbered parts first; or, the first branch is first flowing from the even-numbered parts of the cooling elements arranged in sequence, sequentially increasing the number of even-numbered partial cooling elements, and finally from the even-numbered parts One outflow, the first The two paths flow from the last part of the odd-numbered portion of the cooling element, and the odd-numbered partial cooling elements are sequentially descended in series, and only the first part flows out from the odd-numbered portion.

Wherein the assembly further includes a flow divider and a manifold, the coolant first entering the flow divider, and the splitter is divided into two branches, the two branches being respectively associated with the first branch and the second branch The inlet of the road is connected, and the combiner is connected to the outlets of the first branch and the second branch.

Wherein, the assembly further includes a reactor, and the coolant first enters the reactor, and flows into the shunt through the reactor.

A converter valve assembly cooling system, the assembly comprising a cooling element and a heating element arranged in sequence at intervals, the assembly comprising at least two cooling elements and a heating element, the assembly further comprising a reactor 1 and a reactor The cooling system includes at least two coolant delivery branches, and the coolant enters the reactor 1 and the reactor 2 respectively, and after the reactor is first-class, the first branch is connected, and the reactor 2 is passed through After flowing out, the second branch is connected; the first branch flows from the odd-numbered portions of the cooling elements sequentially, and the odd-numbered partial cooling elements are sequentially connected in series, and the last one flows out from the odd-numbered portion, and the second branch sequentially arranges the cooling elements. The last part of the even part flows in, descendingly, the even part of the cooling element is connected in series, and the first part flows out from the even part; or the first branch flows in from the even part of the evenly arranged cooling element, and sequentially flows up the even part of the even part of the cooling element. , the last one flows out from the even part, and the second way flows from the last part of the odd-numbered part of the cooling element in sequence, and then descends sequentially. The odd part of the cooling element in series, the effluent from the first only the odd part.

After adopting the above scheme, the present invention has the following beneficial effects:

1) The pipeline structure of the system is simple and easy to implement;

2) Reduce the number of interfaces, reduce the risk of leakage, and improve reliability;

3) The thermal stress of each power electronic component in the assembly is substantially the same, which improves the utilization of the converter valve assembly;

4) Reduce the flow resistance of the branch line and reduce the flow.

DRAWINGS

1 is a schematic structural view of an embodiment of a cooling valve assembly cooling system according to the present invention;

2 is a schematic view showing the temperature rise of the coolant in the cooling system of the converter valve assembly of the present invention;

Figure 3 is an embodiment of a cooling valve assembly cooling system of the present invention;

Figure 4 is a structural embodiment of a cooling system of the assembly including the flow divider and the combiner of the present invention;

Figure 5 is a structural embodiment of a cooling system in which the assembly of the present invention includes a reactor;

Figure 6 is a structural embodiment of a cooling system in which the assembly of the present invention includes two reactors.

Among them, R1-R9 are cooling elements, H1-H8 are heating elements, 1 is a shunt, 2 is a shunt, and L1 and L2 are reactors.

detailed description

The technical solutions of the present invention are further elaborated below in conjunction with the accompanying drawings and specific embodiments.

An embodiment of the present invention provides a converter valve assembly cooling system, the assembly comprising a cooling element and a heating element arranged in sequence at intervals, the assembly comprising at least two cooling elements and a heating element, the cooling system comprising at least Two coolant conveying branches, the first branch flows from the odd-numbered portions of the cooling elements arranged in sequence, and the odd-numbered partial cooling elements are sequentially in series, and the last one flows out from the odd-numbered portions, and the second branch sequentially arranges the cooling elements The last part of the even part flows in, descendingly, the even part of the cooling element is connected in series, and the first part flows out from the even part; or the first branch flows in from the even part of the evenly arranged cooling element, and sequentially flows up the even part of the even part of the cooling element. The last one flows out from the even part, and the second way flows from the last part of the odd-numbered part of the cooling element, and sequentially descends the odd-numbered part of the cooling element, and the first part flows out from the odd part.

In the above solution, the assembly may further include a flow divider and a combiner, the coolant first enters the flow divider, and the splitter is divided into two branches, and the two branches are respectively connected to the first branch and the second branch. The inlet is connected, and the combiner is connected to the outlets of the first branch and the second branch. The function of the diverter is to divide the coolant entering the module into two branches, reduce the flow of the branch under the same temperature difference of the inlet and outlet, and reduce the requirement for the radiator. The combiner is used to collect the two branches. Coolant.

In the above solution, the component may further comprise a reactor, the coolant first enters the reactor, flows out through the reactor and enters the shunt, and is divided into two branches by the splitter, and the two branches are respectively connected to the first branch Connected to the inlet of the second branch, the combiner is connected to the outlets of the first branch and the second branch. Reactance The function of the device is to limit the current rising rate of the heating element in the component, to withstand the punching voltage, and to protect the heating element.

Another embodiment of the present invention provides a converter valve assembly cooling system, the assembly comprising a cooling element and a heating element arranged in sequence at intervals, the assembly comprising at least two cooling elements and a heating element, the assembly further comprising a reactor 1 and a reactor 2; the cooling system includes at least two coolant delivery branches, and the coolant enters the reactor 1 and the reactor 2 respectively, and the first branch is connected after the reactor is first-class, After the reactor 2 flows out, the second branch is connected; the first branch flows from the odd-numbered portions of the cooling elements sequentially, and the odd-numbered partial cooling elements are sequentially connected in series, and the last one flows out from the odd-numbered portion, and the second branch The roads are arranged from the even part of the even-numbered part of the cooling element, and the descending part is connected in series with the even-numbered part of the cooling element, and the first part flows out from the even-numbered part; or the first branch flows in from the even-numbered part of the cooling element sequentially. Ascending serially connected even part of the cooling element, flowing out from the last part of the even part, the second way is from the odd part of the cooling element arranged in sequence An inflow series descending order odd part of the cooling element, only the portion of the first effluent from the odd. Among them, the role of the reactor is to limit the current rise rate of the heating element in the assembly, to withstand the voltage, and to protect the heating element.

The converter valve assembly cooling system of the embodiment of the invention belongs to a series-parallel combination structure, and the structure can reduce the number of interfaces of the internal cooling system of the converter valve assembly, reduce the risk of coolant leakage, and improve system reliability; The solution of the embodiment can also balance the thermal stress of the components in the component, improve the utilization rate of the component, reduce the flow rate of the branch pipeline, and reduce the flow resistance.

Hereinafter, the technical solution and the beneficial effects of the present invention will be described in detail based on the DC transmission system converter valve and the accompanying drawings. Although the invention is directed to a DC transmission system converter valve, it is not specifically only for the DC transmission system converter valve, nor is it specifically for the cooling of the converter valve assembly, but also for the similarity to the converter valve assembly. Cooling of other components of the structure.

Figure 1 shows an embodiment of the component cooling system of the present invention, the assembly comprising seven heat sinks (R1, R2, R3, R4, R5, R6, R7) and six thyristors (H1, H2, H3, H4, H5, H6), heat sink and thyristor according to R1, H1, R2, H2, R3, H3, R4, H4, R5, H5, R6, The order of H6 and R7 is sequentially arranged at intervals. The cooling system of the assembly includes two coolant delivery branches, and the first branch W1 coolant flows from the odd-numbered portion of the first radiator R1 which sequentially arranges the radiators, and the odd-numbered portions are sequentially connected in the order of R1, R3, R5, and R7. The radiator flows out from the last radiator R7 of the odd-numbered portion; the second branch W2 coolant flows from the even-numbered portion of the radiator and the last radiator R6, and the even-numbered radiators are connected in series according to R6, R4, and R2. The first radiator R2 flows out from the even portion.

As shown in Fig. 2, the temperature of the coolant in each branch in Fig. 1 is constantly rising in the direction of flow. Fig. 2 only shows the tendency of temperature rise, and the actual temperature rise curve is not necessarily a straight line. For a single thyristor, although the coolant temperatures of the heat sinks on both sides may be different, in general, the heat dissipation conditions of each heat sink are substantially the same. Through the above embodiments of the present invention, the heat dissipation conditions of each thyristor in the assembly are equalized, and the utilization ratio of the thyristor assembly is improved.

Figure 3 shows another embodiment of the component cooling system of the present invention, the assembly comprising eight heat sinks (R1, R2, R3, R4, R5, R6, R7, R8) and seven thyristors (H1, H2, H3) , H4, H5, H6, H7), the heat sink and the thyristor are arranged in the order of R1, H1, R2, H2, R3, H3, R4, H4, R5, H5, R6, H6, R7, H7, R8. The cooling system of the assembly comprises two coolant conveying branches, and the first branch W1 coolant flows from the even part of the first radiator R2 which sequentially arranges the radiators, and the even parts are connected in series according to R2, R4, R6 and R8. The radiator flows out from the last radiator R8 of the even-numbered part; the second branch W2 coolant flows from the odd-numbered part of the radiator and the last radiator R7, and the odd-numbered parts are arranged in series according to R7, R5, R3, and R1. The device flows out from the odd-numbered portion of the first heat sink R1.

Figure 4 shows a modified example of the component cooling system of the present invention comprising six heat sinks (R1, R2, R3, R4, R5, R6) and five thyristors (H1, H2, H3, H4, H5) Also included are the splitter 1 and the combiner 2. The heat sink and the thyristor are sequentially arranged in the order of R1, H1, R2, H2, R3, H3, R4, H4, R5, H5, and R6. In the cooling system of the assembly, after the coolant enters the flow divider 1, it is divided into two branches, and the first branch W1 flows from the odd-numbered portion of the first radiator R1 in the order of the radiators, in the order of R1, R3, and R5. The odd-numbered partial heat sink is connected in series, and flows out from the last radiator R5 of the odd-numbered portion to enter the combiner 2; the second branch W2 is arranged from the heat sink in sequence The last part of the radiator R6 flows in, and the even part of the radiator is connected in series in the order of R6, R4, and R2, and flows out from the even part of the first radiator R2, and also enters the combiner 2. Wherein, the function of the diverter 1 is to divide the coolant entering the component into two branches, reduce the flow of the branch under the condition of the same temperature difference of the inlet and outlet, and reduce the requirement for the radiator, and the combiner 2 is used for collecting Coolant for both branches.

Figure 5 shows a further modified embodiment of the module cooling system of the present invention comprising seven heat sinks (R1, R2, R3, R4, R5, R6, R7, R8, R9) and eight thyristors (H1) H2, H3, H4, H5, H6, H7, H8) further include a reactor L1, a shunt 1 and a shunt 2. The heat sink and the thyristor are sequentially arranged in the order of R1, H1, R2, H2, R3, H3, R4, H4, R5, H5, R6, H6, R7, H7, R8, H8, and R9. In the cooling system of the assembly, the coolant first flows into the reactor L1, and flows out of the reactor L1 into the splitter 1 and is divided into two branches. The first branch W1 is cooled by the first portion of the heat sink. R1 flows in, and an odd-numbered partial heat sink is connected in series according to R1, R3, R5, R7, and R9, and flows out from the last radiator R9 of the odd-numbered portion to enter the combiner 2; the second branch W2 sequentially arranges the even-numbered portions of the heat sink The last radiator R8 flows in, and the even-numbered partial heat sinks are connected in series in the order of R8, R6, R4, and R2, and flow out from the even-numbered first radiator R2, and also enters the combiner 2. Among them, the function of the reactor L1 is to limit the current rising rate of the thyristor in the assembly, to withstand the rush voltage, and to protect the thyristor.

Figure 6 shows a further modified embodiment of the component cooling system of the present invention, the assembly comprising seven heat sinks (R1, R2, R3, R4, R5, R6, R7) and six thyristors (H1, H2, H3, H4, H5, H6) also include reactors L1, L2. The heat sink and the thyristor are sequentially arranged in the order of R1, H1, R2, H2, R3, H3, R4, H4, R5, H5, R6, H6, and R7. The cooling system of the assembly includes two coolant delivery branches. The first branch W1 coolant first flows into the reactor L1, and flows out from the reactor L1 and then flows from the odd-numbered portion of the first radiator R1 which sequentially arranges the radiators. According to R1, R3, R5, R7, the odd-numbered part of the heat sink is connected in series, and the last radiator R7 flows out from the odd-numbered part; the second branch W2 coolant first flows into the reactor L2, and the radiator is discharged from the reactor L2. The even part of the last radiator R6 flows in, and the even part of the heat sink is connected in series in the order of R6, R4, and R2, and flows out from the even part of the first radiator R2. Among them, the role of reactors L1, L2 is to limit The current rise rate of the thyristor during the turn-on process, the withstand voltage, and the protection of the thyristor.

In summary, after adopting the above embodiment of the present invention, it has at least the following beneficial effects:

1) The pipeline structure of the system is simple and easy to implement;

4) Reduce the flow resistance of the branch line and reduce the flow.

The above embodiments are only for explaining the technical idea of the present invention, and the scope of protection of the present invention is not limited thereto. Any modification made based on the technical idea according to the technical idea of the present invention falls within the protection scope of the present invention. Inside.

Claims

A converter valve assembly cooling system, characterized in that the assembly comprises a cooling element and a heating element arranged in sequence at intervals, the assembly comprising at least two cooling elements and a heating element, the cooling system comprising at least two a coolant conveying branch, the first branch flows from the odd-numbered portions of the cooling elements arranged in sequence, and the odd-numbered partial cooling elements are sequentially connected in series, and the last one flows out from the odd-numbered portion, and the second branch sequentially arranges the cooling elements The last part of the even part flows in, descendingly, the even part of the cooling element is connected in series, and the first part flows out from the even part; or, the first branch flows in from the even part of the evenly arranged cooling element, and sequentially increases the number of even parts in the series. The last one flows out from the even part, and the second way flows from the last part of the odd-numbered part of the cooling element, and sequentially descends the odd-numbered part of the cooling element, and the first part flows out from the odd part.
A converter valve assembly cooling system according to claim 1 wherein said assembly further includes a flow splitter and a manifold, the coolant first entering said splitter, said splitter being split into two branches, Two branches are respectively connected to the inlets of the first branch and the second branch, and the combiner is connected to the outlets of the first branch and the second branch.
A converter valve assembly cooling system according to claim 2, wherein said assembly further comprises a reactor, the coolant first entering said reactor, flowing out of said reactor and entering said splitter.
A converter valve assembly cooling system, characterized in that the assembly comprises a cooling element and a heating element arranged in sequence at intervals, the assembly comprising at least two cooling elements and a heating element, the assembly further comprising a reactor And a reactor 2; the cooling system includes at least two coolant delivery branches, and the coolant enters the reactor 1 and the reactor 2 respectively, and the first branch is connected after the reactor is first-class, and the reactor is connected. After the reactor 2 flows out, the second branch is connected; the first branch flows from the odd-numbered portions of the cooling elements sequentially, and the odd-numbered partial cooling elements are sequentially ascended, and the last one flows out from the odd-numbered portion, and the second branch flows from the second branch. The even-numbered portions of the cooling elements are sequentially arranged to flow in the last one, and the even-numbered partial cooling elements are sequentially connected in descending order, and only the first portion flows out from the even-numbered portions; or, the first branch flows from the even-numbered portions of the sequentially arranged cooling elements first, and sequentially rises in series Even part of the cooling element, the last one from the even part, the second way from the odd part of the cooling element arranged last Into, according to The descending sequence connects the odd-numbered partial cooling elements, and only flows out from the odd-numbered parts first.