CN202713137U

CN202713137U - Bypass device based on IEGT H bridge power unit

Info

Publication number: CN202713137U
Application number: CN 201220390195
Authority: CN
Inventors: 钟连宏; 魏远航; 欧阳旭东; 陈剑光; 刘锦兰; 黄献生; 邱育义; 骆树权; 吴汝豪; 谢建容; 孔慧超; 罗伟康; 杜巍; 王春岩
Original assignee: Liaoning Rongxin Power Electronic Co ltd; Guangdong Power Grid Co Ltd; Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Current assignee: Rongxin Huike Electric Co ltd; Guangdong Power Grid Co Ltd; Dongguan Power Supply Bureau of Guangdong Power Grid Co Ltd
Priority date: 2012-08-07
Filing date: 2012-08-07
Publication date: 2013-01-30
Anticipated expiration: 2022-08-07

Abstract

The utility model discloses a bypass device based on IEGT H Bridge power units, and the bypass device is designed for a STATCOM topological circuit comprising a plurality of IEGT H bridge power units. The bypass device comprises a plurality of bypass modules, each bypass module is connected with one of the IEGT H bridge power units of the STATCOM topological circuit, the STATCOM topological circuit comprises two parallelly connected STATCOM, each STATCOM is serially connected with a group of IEGT H bridge power units on each phase, each bypass module comprises an electronically-controlled contactor and two thyristors, the electronically-controlled contactor and the two thyristors are parallelly connected between output ends of two phase modules of corresponding IEGT H bridge power unit, and the two thyristors are in inverse-parallel connection.

Description

Shunting device based on the IEGTH bridge power unit

Technical field

The utility model relates to the electronic circuit technology field, particularly relates to a kind of shunting device based on IEGT H bridge power unit.

Background technology

IEGT H bridge power unit is a kind of for STATCOM(Static Synchronous Compensator, and Static Var Compensator is called for short STATCOM, claims again SVG) power cell.In the conventional art, the bypass module of IEGTH bridge power unit mostly is the bypass module of simple function, such as the single power cell of bypass only, maybe can only realize redundant bypass functionality.In addition, when a power cell broke down, existing bypass module can only with its bypass, can't start standby power units simultaneously.

The utility model content

The utility model proposes a kind of shunting device based on IEGT H bridge power unit, can bypass an any IEGT H bridge power unit, and be not subjected to the constraint of place voltage phase.

The utility model comprises several bypass modules based on the shunting device of IEGT H bridge power unit, and each bypass module connects an IEGT H bridge power unit in the STATCOM topological circuit,

Described STATCOM topological circuit comprises the STATCOM of two parallel connections, each STATCOM every mutually the series connection one group of IEGT H bridge power unit,

Described bypass module comprises electric control contactor and two thyristors, and described electric control contactor and two described thyristors are connected in parallel between the output of two phase modules of corresponding IEGT H bridge power unit, two described thyristor reverse parallel connections.

The utility model is based on the shunting device of IEGT H bridge power unit, design for the STATCOM topological circuit that comprises several IEGT H bridge power units, this STATCOM topological circuit has the STATCOM of two parallel connections, and each of each STATCOM is one group of IEGT H bridge power unit of upper series connection mutually.For can bypass an any any IEGT H bridge power unit mutually, connect a bypass module at each IEGT H bridge power unit.In addition, in order to realize redundant bypass functionality, there is mutually part IEGT H bridge power unit to be used for backup at each, when the IEGT H bridge power unit of normal operation breaks down, utilize its corresponding bypass module that it is stopped using, utilize simultaneously corresponding bypass module to enable the IEGT H bridge power unit of backup.

Description of drawings

Fig. 1 is 35kV ± 320Mvar STATCOM double parallel topological circuit schematic diagram;

Fig. 2 is 35kV ± 320Mvar STATCOM double parallel IEGT H bridge power unit container structure layout plan;

Fig. 3 is that the utility model is based on the bypass module of the shunting device of IEGT H bridge power unit and the logic diagram of IEGTH bridge power unit;

Fig. 4 is that the utility model is based on the circuit theory intention of bypass module and the IEGTH bridge power unit of the shunting device of IEGT H bridge power unit;

Fig. 5 is the view of bypass module under IEGT H bridge power unit normal operation;

Fig. 6 is the view of bypass module under IEGT H bridge power unit failure condition;

Fig. 7 is the schematic diagram of simultaneously bypass of three-phase valve terminal;

Fig. 8 is the schematic diagram of simultaneously bypass of single-phase valve terminal;

Fig. 9 is the schematic diagram of single valve terminal bypass.

Embodiment

Explain in detail the utility model below in conjunction with accompanying drawing.

The utility model is designed for the IEGT H bridge power unit in the STATCOM topological circuit based on the shunting device of IEGT H bridge power unit.As shown in Figure 1, this STATCOM topological circuit comprises the STATCOM of two parallel connections, each of each STATCOM one group of IEGT H bridge power unit of connecting on mutually.The concrete number of one group of IEGT H bridge power unit depends on the needs, and preferably is illustrated in figure 1 as 26: A1, A2, A3 ..., A26.Shown in Figure 2 is STATCOM double parallel IEGT H bridge power unit container structure layout plan.

For can bypass an any any IEGT H bridge power unit mutually, connect a bypass module at each IEGT H bridge power unit.Shown in Figure 7 is the schematic diagram of simultaneously bypass of three-phase valve terminal, is the schematic diagram of simultaneously bypass of single-phase valve terminal shown in Fig. 8, and shown in Figure 9 is the schematic diagram of single valve terminal bypass.

Shown in Figure 3 is that the modularization of bypass module and IEGT H bridge power unit concerns schematic diagram, and shown in Figure 4 is the physical circuit schematic diagram of bypass module and IEGT H bridge power unit.As shown in Figure 4, bypass circuit comprises electric control contactor KM and two thyristor SCR1, SCR2, electric control contactor KM and two described thyristor SCR1, SCR2 are connected in parallel between the output of two phase modules of corresponding IEGT H bridge power unit, and two described thyristor SCR1, SCR2 reverse parallel connection.When IEGT H bridge power unit works, as shown in Figure 5, the electric control contactor of corresponding bypass module disconnects, when IEGT H bridge power unit breaks down, as shown in Figure 6, this IEGT H bridge power unit is controlled the electric control contactor closure of corresponding bypass module.

In order to realize redundant bypass functionality, STATCOM is every to have part as 2-3 IEGT H bridge power unit for backing up on mutually.Under normal circumstances, the electric control contactor of the bypass module that the IEGT H bridge power unit that is used for backing up connects is closed, this IEGT H bridge power unit is not worked, when this is gone up mutually certain IEGT H bridge power unit and breaks down, the IEGT H bridge power unit of fault is bypassed, the electric control contactor of the bypass module that the IEGT H bridge power unit that is used for backing up connects transfers disconnection to by closure, and the IEGTH bridge power unit that is used for backup is started working.

The above embodiment has only expressed several execution mode of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art, without departing from the concept of the premise utility, can also make some distortion and improvement, these all belong to protection range of the present utility model.Therefore, the protection range of the utility model patent should be as the criterion with claims.

Claims

1. the shunting device based on IEGT H bridge power unit is characterized in that, comprises several bypass modules, and each bypass module connects an IEGT H bridge power unit in the STATCOM topological circuit,

2. the shunting device based on IEGT H bridge power unit according to claim 1, it is characterized in that, samely go up mutually 2 or 3 IEGT H bridge power units and be used for backup, when the IEGT H bridge power unit in the work breaks down, the electric control contactor of controlling the shunting device of its connection transfers closure to by disconnection, and the electric control contactor of the bypass module that the IEGT H bridge power unit control that is used for backing up connects transfers disconnection to by closure.