CN203398786U

CN203398786U - MMC-UPQC structure

Info

Publication number: CN203398786U
Application number: CN201320453646.6U
Authority: CN
Inventors: 徐柏榆; 刘正富; 陈青恒; 盛超; 曾繁鹏; 马明; 王浩; 李兰芳
Original assignee: Huizhou Power Supply Bureau Of Guangdong Power Grid Corp; Liaoning Rongxin Power Electronic Co ltd; Electric Power Research Institute of Guangdong Power Grid Co Ltd
Current assignee: Liaoning Rongxin Industrial Electric Power Technology Co ltd; Montnets Rongxin Technology Group Co ltd; Huizhou Power Supply Bureau of Guangdong Power Grid Co Ltd; Electric Power Research Institute of Guangdong Power Grid Co Ltd
Priority date: 2013-07-26
Filing date: 2013-07-26
Publication date: 2014-01-15
Anticipated expiration: 2023-07-26

Abstract

Provided is an MMC-UPQC structure, comprising a UPQC serial-connection container, a UPQC low-voltage cabinet container, a UPQC parallel-connection container, a UPQC high-voltage cabinet container, single-phase isolation transformers, UPQC bridge arm reactors and filter reactors. The single-phase isolation transformers are disposed adjacent to a feed-out bus. The UPQC serial-connection container, the UPQC low-voltage cabinet container and the UPQC parallel-connection container are successively arranged on one line and are disposed at one side of a cable duct. The UPQC high-voltage cabinet container and the UPQC are vertically arranged at the other side of the cable duct. Stacked in three layers, the UPQC bridge arm reactors and the filter reactors are combined to form a serial connection part and a parallel connection part, and are disposed at two sides of the UPQC low-voltage cabinet container. With a compact structure, the MMC-UPQC structure of the utility model can directly run in the outdoor environment safely and reliably, and occupies small area. In addition, connection lines between devices are concise, the electric and civil engineering construction periods are short, the cost is saved and the expense is lowered.

Description

MMC-UPQC structure

Technical field

The utility model relates to the structural design of MMC-UPQC, particularly a kind of MMC-UPQC plane layout structure.

Background technology

Modern industry, business and residential electricity consumption equipment, as high-performance office equipment, accurate laboratory apparatus, frequency control equipment, programmable logic controller (PLC), various automatic assembly line and computer system etc., the sensitiveness that power supply characteristic is changed is ascendant trend year by year; Meanwhile, power quality problem becomes increasingly complex, and the loss being caused by electrical energy power quality disturbance increases increasingly.Therefore, in order to improve power supply quality, reduce because of loss that power quality problem causes user, protect user benefit, build good investment environment, adopt advanced quality of power supply control technique to become one of development trend of following supply of electric power.

Single electric energy regulator can only solve part power quality problem.Increasingly sophisticated along with distribution net work structure and electric load composition, the situation that various power quality problems occur in same distribution system or in same power load simultaneously also can get more and more.If existing voltage-sensitive load has again nonlinear-load and impact load in same garden, just voltage compensating device and current compensator need to be installed simultaneously.If all take separately the controlling device of a type for each power quality problem, this mode will greatly improve cost of investment, increase the complexity of cooperation between device operation maintenance workload and each device.Therefore, the quality of power supply Comprehensive Control Technology based on Unified Power Quality Controller (Unified Power Quality Conditioner, UPQC) is arisen at the historic moment.

Unified Power Quality Controller comprises part in parallel and series connection part.Wherein, series connection part is used for solving voltage problem, possesses DVR, DUPS function; Part in parallel is used for solving current problems, possesses D-STATCOM, APF function.Two parts both can decoupling zero after independent operating realize function separately, can realize unified comprehensive function by cooperation again.The function that UPQC has mainly includes: (1) voltage dynamic adjustments, by bucking voltage fall temporarily, voltage swell, voltage harmonic, the voltage that maintains load-side is nominal value; (2) dynamic passive compensation, burning voltage deviation, improves the power factor of load; (3) active power filtering, the quality of assurance system power; (4) equilibrating compensation, comprises filtering negative phase-sequence, zero-sequence component; (5) dynamic uninterrupted power supply; (6) energy storage, meritorious dynamic adjustments; (7) high-quality DC power supply.

And MMC(modular multilevel converter)-UPQC mainly by UPQC series connection part, UPQC part in parallel, UPQC high-voltage switch cabinet body part, UPQC low-voltage cabinet body divide, single-phase isolating transformer, UPQC device dedicated transformer, UPQC brachium pontis reactor, the compositions such as apparatus body such as filter reactor.According to the existing structural design to MMC-UPQC, the layout of MMC-UPQC equipment is generally measure-alike container and is arranged together, and UPQC brachium pontis reactor, filter reactor etc. adopt single-phase individual layer " one " word or " product " word to arrange simultaneously.This kind of arrangement floor space is large, and between equipment, line is complicated, civil engineering and the electrical construction cycle is long, expense is high.

Utility model content

Based on this, for above-mentioned problems of the prior art, the purpose of this utility model is to provide the duration of a kind of compact conformation, outdoor installation and construction short and take up an area little MMC-UPQC structure.

For achieving the above object, the utility model embodiment by the following technical solutions:

A kind of MMC-UPQC structure, comprise: the UPQC container of connecting, UPQC low pressure cabinet container, UPQC container in parallel, UPQC high-voltage switch cabinet body container, single-phase isolating transformer, UPQC brachium pontis reactor, filter reactor, described single-phase isolating transformer is arranged on the position approaching with feeding out bus, described UPQC series connection container, UPQC low pressure cabinet container, UPQC container in parallel is yi word pattern spread configuration successively, and be arranged on a side of cable trough, the described UPQC high-voltage switch cabinet body container opposite side that arrange and be arranged on described cable trough vertical with described UPQC, described UPQC brachium pontis reactor, stacked the putting of filter reactor three is combined into connection in series-parallel two parts, be separately positioned on the both sides of described UPQC low pressure cabinet container.

According to the scheme of above-mentioned the utility model embodiment, this structure arranges middle UPQC series connection part, UPQC part in parallel, UPQC high-voltage switch cabinet body part, UPQC low-voltage cabinet body and is divided into container-type structural configuration, and UPQC brachium pontis reactor, filter reactor etc. are three-phase arranged stacked.Package unit compact conformation, can be directly safety, operation reliably under environment out of doors, take up an area littlely, between equipment, line is succinct, electric and the civil engineering cycle is short, cost-saving, reduction expense.

Accompanying drawing explanation

Fig. 1 is the structural representation of MMC-UPQC structure embodiment of the present utility model;

Fig. 2 is the planar structure schematic diagram of a MMC-UPQC in concrete application;

Fig. 3 is the reactor planar structure schematic diagram in MMC-UPQC structure in a concrete example;

Fig. 4 is the main wiring diagram of a MMC-UPQC framework place system in concrete example.

Embodiment

Below in conjunction with better embodiment wherein, the utility model scheme is described in detail.

The structural representation of MMC-UPQC structure embodiment of the present utility model has been shown in Fig. 1.As shown in Figure 1, in the present embodiment, this MMC-UPQC structure includes: the UPQC container of connecting, UPQC low pressure cabinet container, UPQC container in parallel, UPQC high-voltage switch cabinet body container, single-phase isolating transformer, UPQC brachium pontis reactor, filter reactor, wherein, single-phase isolating transformer is arranged on the position approaching with feeding out bus, the UPQC container of connecting, UPQC low pressure cabinet container, UPQC container in parallel is yi word pattern spread configuration successively, and be arranged on a side of cable trough, the UPQC high-voltage switch cabinet body container opposite side that arrange and be arranged on described cable trough vertical with UPQC, UPQC brachium pontis reactor, stacked the putting of filter reactor three is combined into connection in series-parallel two parts, be separately positioned on the both sides of UPQC low pressure cabinet container.In shown in Fig. 1, because the position that feeds out bus of reality is also uncertain, in shown in Fig. 1, be to take right side that single-phase isolating transformer is arranged on UPQC brachium pontis reactor, filter reactor part in parallel to describe as example, this explanation is not in order to form the restriction to the utility model scheme.

According to the scheme of above-mentioned the utility model embodiment, this structure arranges middle UPQC series connection part, UPQC part in parallel, UPQC high-voltage switch cabinet body part, UPQC low-voltage cabinet body and is divided into container-type structural configuration, and UPQC brachium pontis reactor, filter reactor etc. are three-phase arranged stacked.Package unit compact conformation, can be directly safety, operation reliably under environment out of doors, take up an area littlely, between equipment, line is succinct, electric and the civil engineering cycle is short, cost-saving, reduction expense.According to the MMC-UPQC structure in the present embodiment as above, the planar structure schematic diagram of the MMC-UPQC in a concrete application has been shown in Fig. 2.In application scenarios shown in Fig. 2, because transformer station is former, feed out bus (cable) and deliver to user through the cable trough of southwestern side.No longer newly-increased for making full use of original cable, therefore, shown in Fig. 2 in, be arranged on southwest corner with feeding out 3 single-phase isolating transformers that bus connects, near existing cable trough, thereby can utilize original bus that feeds out to carry out structure setting.

In addition, as shown in Figure 2, UPQC series connection container, UPQC low pressure cabinet container, UPQC container in parallel are from being the setting of " one " font to east, thereby neat appearance not only, the distance of connecting with UPQC between container and UPQC parallel connection container due to UPQC control system (be arranged on UPQC low pressure cabinet container in) is again shorter, therefore the optical fiber laying therebetween also shorten, thereby make its signal attenuation minimum, met the requirement of package unit response time.

Because high-voltage switch cabinet body container contains multiaspect high-tension switch cabinet, between high-tension switch cabinet and UPQC connection in series-parallel container, there are many group high-tension cables to be connected, if distant, cable buying and construction cost will significantly increase, therefore, in shown in Fig. 2, UPQC high-voltage switch cabinet body container is arranged in the southern side of UPQC low pressure cabinet container, with vertical setting of UPQC low pressure cabinet container.

As shown in Figure 2, in this embodiment, this single-phase isolating transformer 1 has three, and each single-phase isolating transformer is yi word pattern setting, each single-phase isolating transformer 1 is connected with cable bearer 10 by high-tension cable, between adjacent single-phase isolating transformer 1, be provided with fire compartment wall 15, to realize the isolation between each single-phase isolating transformer 1, improve fail safe.

In shown in Fig. 2, also show the special-purpose change 12 of device, the special-purpose change 12 of this device is arranged on the adjacent east side of container in parallel with UPQC as shown in Figure 2, the special-purpose change 12 of device can be connected with external cable by cable bearer 9, special-purpose 12 arranged outside that become of device have metallic mesh 11, to realize fail safe isolation.

According to conventional set-up mode, UPQC brachium pontis reactor, filter reactor are single-phase individual layer " one " word or the setting of " product " word, simultaneously, the electrical connection of brachium pontis reactor and UPQC connection in series-parallel part all realizes by high-tension cable, protection four is set according to this configuration, certainly will greatly increases floor space, cable buying and civil engineering cost.In the application's scheme, through optimizing, UPQC brachium pontis reactor, filter reactor three be stacked to be put and is combined into connection in series-parallel two parts region and arranges, is placed in respectively UPQC low pressure cabinet container thing both sides, thus fine solution solved that above-mentioned floor space is large, the high problem of cost.

As mentioned above, UPQC brachium pontis reactor, filter reactor are three stacked putting.For the ease of connecting, can change binding post mode and the quantity of UPQC brachium pontis reactor, filter reactor, concrete changing mode does not repeat them here.During concrete connection, high-tension cable first connects 4,5, two groups of filter reactors of filter reactor and is electrically connected with aluminium bus array, and then is connected with UPQC brachium pontis reactor 6 by aluminium bus array.That is, equal three stacked putting " " words of UPQC brachium pontis reactor, filter reactor arrange, the electrical connection between homophase realizes with aluminium bus array, have solved well the connection on electric.

Accordingly, the reactor planar structure schematic diagram in MMC-UPQC structure in a concrete example has been shown in Fig. 3.Shown in Fig. 2, Fig. 3, each brachium pontis reactor 6 is connected with cable bearer 8 by high-tension cable, the filter reactor 5 adjacent with brachium pontis reactor 6 by aluminium bus array is connected with power capacitor 7 by high-tension cable, and another filtering capacitor 4 is connected with cable bearer 8 by high-tension cable.

According to above-mentioned the utility model scheme, a concrete main wiring diagram example of the MMC-UPQC framework place system in a concrete example has been shown in Fig. 4.It should be noted that, this main wiring diagram example is only the wiring example for a concrete MMC-UPQC system, not in order to the system configuration of the applied MMC-UPQC of MMC-UPQC framework of the present utility model is limited.

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 the scope of the claims.It 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. a MMC-UPQC structure, it is characterized in that, comprise: the UPQC container of connecting, UPQC low pressure cabinet container, UPQC container in parallel, UPQC high-voltage switch cabinet body container, single-phase isolating transformer, UPQC brachium pontis reactor, filter reactor, described single-phase isolating transformer is arranged on the position approaching with feeding out bus, described UPQC series connection container, UPQC low pressure cabinet container, UPQC container in parallel is yi word pattern spread configuration successively, and be arranged on a side of cable trough, the described UPQC high-voltage switch cabinet body container opposite side that arrange and be arranged on described cable trough vertical with described UPQC, described UPQC brachium pontis reactor, stacked the putting of filter reactor three is combined into connection in series-parallel two parts, be separately positioned on the both sides of described UPQC low pressure cabinet container.

2. MMC-UPQC structure according to claim 1, is characterized in that, described filter reactor is connected with high-tension cable, and two groups of filter reactors are electrically connected with aluminium bus array, and is connected with UPQC brachium pontis reactor by aluminium bus array.

3. MMC-UPQC structure according to claim 2, it is characterized in that, each brachium pontis reactor is connected with cable bearer by high-tension cable, the filter reactor adjacent with brachium pontis reactor by aluminium bus array is connected with power capacitor by high-tension cable, and another filtering capacitor is connected with cable bearer by high-tension cable.

4. according to the MMC-UPQC structure described in claims 1 to 3 any one, it is characterized in that, described single-phase isolating transformer has three, and each single-phase isolating transformer is yi word pattern setting, between adjacent single-phase isolating transformer, is provided with fire compartment wall.

5. MMC-UPQC structure according to claim 4, is characterized in that, each single-phase isolating transformer is connected with cable bearer by high-tension cable.