CN201062570Y

CN201062570Y - Novel wind-power generator

Info

Publication number: CN201062570Y
Application number: CNU2007200734176U
Authority: CN
Inventors: 贾大江
Original assignee: WANDE WIND POWER GENERATION CO Ltd SHANGHAI
Current assignee: WANDE WIND POWER GENERATION CO Ltd SHANGHAI
Priority date: 2007-08-08
Filing date: 2007-08-08
Publication date: 2008-05-21
Anticipated expiration: 2017-08-08

Abstract

The utility model relates to a novel wind driven generating system, which comprises at least two wind driven generators, a controlling device, a parallel connected inverter, wherein, at least two wind driven generators are respectively connected with each rectifier, each rectifier is mutually connected with the controlling device, and the controlling device is mutually connected with the parallel connected inverter. Compared with the each single parallel connected electrical network technology of the single wind driven generator, when the power is less than 300 kw, the reliability of the utility model not only is high, the cost is low, the maintenance is convenient, and the utility model is suitable for the status quo of the power transmission and transformer of an agriculture network in China.

Description

A kind of wind power generation system

Technical field

The utility model relates to wind-power electricity generation, particularly relates to a kind of wind power generation system.

Background technique

At present both at home and abroad wind-power generating system roughly is divided into two big classes: a class be based on the family of the independent operating of middle low power blower fan with or the groupuscule wind-power generating system.Be mainly used in non-Electric region resident daily life electricity consumption.This system and electrical network are unconnected, independent operating.This type of type is from net type wind power generating set.

Another kind of then is to be main type with the high-power wind-driven generator group, and the separate unit wind-driven generator produces electric energy alone, by grid-connection device electric energy is connected to the grid then, provides electric power to electrical network, is powered to the user by electrical network again.This type of type is the grid type wind power generating set.

At present both at home and abroad the basic pattern that is connected to the grid of wind power generator incorporated in power network is that the separate unit blower fan independently is connected to the grid by separately grid-connection device respectively.Also do not have at present to control the type that is incorporated into the power networks by same grid-connection device after the parallel connection of many typhoons power generator.

Generally all between 300kW-3000kW, also existing 5000kW blower fan is in trial run for the grid type power of fan.Current grid type wind power generating set is taked to build in the mode that wind energy turbine set is built in the extraordinary area of wind-resources mostly.Some countries have also as states such as Germany that the power wind-driven generator is connected to the grid in the decentralized of some power between 30kW-250kW in Europe, and the generator type is an induction generator.

Current international and domestic what comparatively pay attention to is the high-power grid type system of advanced technology, and power in the middle power grid type system applies of 50-300kW seldom.But be fit to build the region of high-power wind turbine field, only only limit to fewer several area in China.In the area of local annual mean wind speed greater than 4.5m/s, power grid connected wind power unit in just can building.And annual mean wind speed will reach more than 6 meter per seconds, just can build high-power grid connected wind power unit.Be fit to build the region of high-power wind turbine field, with regard to landlocked, approximately only account for 1/100 of national total area.And the region of China more than 60% is suitable build in the power multi-blower fans connection in parallel type wind-power generating system that is incorporated into the power networks.If only build the large-scale wind electricity field, many wind energy available resources can't be utilized, will cause significant wastage to wind energy resources.Be the mistaken ideas of wind energy resources exploitation.

In addition because the precondition of wind power generation set grid-connection is that power transmission and transformation line will be arranged, it is to be adopted as wind energy turbine set to build power transmission and transformation line specially and solve the transmission of electricity problem that big blower fan is incorporated into the power networks, and also will build accommodation road, and cost is higher.

Have for the unit of power more than 300kW, because rotor diameter is big, unit spacing is quite far away again again, so many in parallel networkings do not have tangible economic technology advantage.But for the middle low power blower fan between the 2-50kW, if every all online separately, then every typhoon machine all will possess grid-connection device, since in the grid-connection device except that power device varies in size, remaining circuit and device are essentially identical, so the separate unit power of fan is more little, the cost of then sharing in every kilowatt of cost that is incorporated into the power networks is just high more, thereby causes low in economic efficiency.And device is many more, and then reliability is poor more.If in many, the online of small-power fan parallel-connection, then can use the more high-power grid-connection device that is equipped with, good economy performance not only, and also reliability increases substantially.

Up to the present, China is domestic only the small-sized set grid-connection test of 2kW unit, does not have the middle power unit that is incorporated into the power networks, and does not also have multi-blower fans connection in parallel type grid-connected system.

Summary of the invention

The purpose of this utility model is exactly for when being incorporated into the power networks power when 300KW is following, overcome above-mentioned existing separate unit wind power generating set separately the technology that is connected to the grid of separate unit compare the defective of existence, and provide a kind of little investment, high efficiency, reliability height, wind power generation system easy to maintenance.

The purpose of this utility model can be achieved through the following technical solutions: a kind of wind power generation system, it is characterized in that, comprise at least two typhoon power generators, a control gear, a combining inverter, described at least two typhoon power generators are connected with rectifier separately respectively, each rectifier and control gear interconnect, and described control gear and combining inverter interconnect.

Described control gear comprises programmable controller, drain charge device, and described programmable controller interconnects by switching circuit and drain charge device.

Compared with prior art, the utility model adopt in, small-power wind power generator incorporated in power network group is for the large fan group, lower to the wind-resources conditional request, in the area of local annual mean wind speed greater than 4.5m/s, power grid connected wind power unit in just can building; And annual mean wind speed will reach more than 6 meter per seconds, just can build high-power grid connected wind power unit; And be based on utilizing the power transmission and transformation terminal facility of existing urban and rural power grids to solve the transmission of electricity problem, can significantly reduce cost; The general minimum power of transformer of China's urban and rural power grids power transmission and transformation terminal is 50kW at present, mostly between 100-300kW, the choosing of power range so the utility model is incorporated into the power networks can be easy because of ground system, do not increase investment, thereby cost is low, construction period is short, reliability height not only, and also price is low, easy to maintenance, be fit to national conditions.

Description of drawings

Fig. 1 is a structured flowchart of the present utility model.

Embodiment

The utility model is described in further detail below in conjunction with accompanying drawing.

Present embodiment selects for use Wande Wind Power Generation Co., Ltd., Shanghai to produce and one of three of FD13-50/12 type 50kW wind-driven generators selling and FK-200 type 200kW control gear, and one of Hefei Sunlight Power Supply Co., Ltd.'s WG200 type 200kW combining inverter of producing and selling.

FD13-50/12 type wind-driven generator begins to build the Hair Fixer electricity during greater than 3.5m/s at wind speed, and the electric energy that blower fan produces is rated power 50Kw, the threephase AC of voltage rating 380V, and maximum output is 60kW.

As shown in Figure 1, present embodiment comprises three typhoon power generators 1,2,3, control gear 4, combining inverter 5, three typhoon power generators 1,2,3 are connected with rectifier 6,7,8 respectively, and each rectifier and control gear 4 interconnect, and described control gear 4 interconnects with combining inverter 5; The threephase AC that three typhoon power generators 1,2,3 produce is a direct current (d.c.) by separately rectifier unsteady flow respectively, each direct current (d.c.) is in parallel in control gear 4, become the mains ripple direct current (d.c.), this mains ripple direct current (d.c.) inputs to combining inverter after by control gear 4 its voltage being controlled, described control gear 4 is according to the size of combining inverter 5 input powers and the running state of electrical network 9, instruction combining inverter generation and mains frequency, the threephase AC that phase place is identical, and flow to electrical network 9.

Described control gear 4 comprises programmable controller 10, drain charge device, and described programmable controller 10 interconnects by switching circuit and drain charge device; The threephase AC that three typhoon power generators produce is the direct current (d.c.) of 420V～620V by separately rectifier unsteady flow respectively; Below DC620V, when above-mentioned mains ripple direct current (d.c.) surpassed DC620V, described programmable controller 10 was connected switching circuits to described control gear 4 with the Control of Voltage of mains ripple direct current (d.c.), and the drain charge device discharges unnecessary electric weight; Described combining inverter 5 generations and mains frequency, the 380V threephase AC that phase place is identical; During wind-driven generator adopts, small-power three-phase rare-earth permanent-magnet synchronous generator.

The electric energy that each wind-driven generator produces be voltage and frequency all at the threephase AC of transient changing, want multi-blower fans connection in parallel, low-cost again, then wind turbine respectively after the rectification DC parallel be the best approach.The threephase AC that wind turbine is produced is the direct current (d.c.) of 420V-620V through rectifier unsteady flow separately, carries out parallel connection then in control cabinet.

Electric current behind the DC parallel has become the direct current (d.c.) of mains ripple.Again by the switching circuit of the drain charge device (resistive load) of Controlled by Programmable Controller, system's rectification and connect after the total voltage superpressure time, circuit turn-on, the drain charge device unnecessary electric weight of releasing, reach the direct current fluctuation voltage of blower fan and solar cells output is controlled automatically, the direct current fluctuation voltage strictness all the time behind blower fan and the solar cells DC parallel is remained on below the DC620V.

Direct current (d.c.) after the three typhoon machine parallel connections is undertaken giving special-purpose combining inverter with obtaining information conveyance after maximal power tracing analyzes by programmable controller.Combining inverter is under the master control of Controlled by Programmable Controller, size according to input power, and by the electrical network instantaneous frequency of gathering on the network transformer, the phase value that each is electric mutually, the magnitude of voltage that each is electric mutually, determine output frequency, voltage, the three-phase electricity phase place separately of inverter, and then by the convertor circuit (SPWM) of combining inverter the Ac that the direct current energy of input changes into mains frequency and the identical three-phase 380V of phase place is linked on the power transformer, flow to electrical network by power transformer again.

Inverter is to be the special electric power electronic product of Ac with the direct current unsteady flow.General its output frequency of universal inverter is constant for fixing 50Hz or 60Hz constant frequency.Output voltage has AC 220V and AC 380V, also has the more inverter of high voltage standard.

Its output frequency of wind power-generating grid-connected inverter then is regulatable at random, this inverter can be according to instruction, by convertor circuit (SPWM) Ac that the direct current energy of input changes into mains frequency and the identical three-phase 380V of phase place is linked on the power transformer, flows to electrical network by power transformer again.

Claims

1. wind power generation system, it is characterized in that, comprise at least two typhoon power generators, a control gear, a combining inverter, described at least two typhoon power generators are connected with rectifier separately respectively, each rectifier and control gear interconnect, and described control gear and combining inverter interconnect.

2. a kind of wind power generation system according to claim 1 is characterized in that, described control gear comprises programmable controller, drain charge device, and described programmable controller interconnects by switching circuit and drain charge device.