CN204012752U - Can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts - Google Patents
Can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts Download PDFInfo
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- CN204012752U CN204012752U CN201420512434.5U CN201420512434U CN204012752U CN 204012752 U CN204012752 U CN 204012752U CN 201420512434 U CN201420512434 U CN 201420512434U CN 204012752 U CN204012752 U CN 204012752U
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Abstract
The utility model discloses can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, relate to parallel network power generation technical field, comprise photovoltaic generating system A, direct current conflux energy-storage system B, synchronous grid-connected inverting system C, multiple branch circuit line concentration boost bucking-out system D and monitoring collection scheduling system E; Described can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts also comprise the grid-connected dilatation transformer substation system F that boosts for multimode combination dilatation; This system is by the grid-connected dilatation transformer substation system F that boosts, realize the composition union net dilatation of multimode power station, upgrade to energy storing and electricity generating station or wind-light complementary energy storage power station, be applicable to the structure in 1MW photovoltaic module power station, utilize especially the networking dilatation of this modularization power station to build more powerful photo-voltaic power generation station.
Description
Technical field
The utility model relates to parallel network power generation technical field, specifically can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts.
Background technology
Existing photovoltaic plant is owing to there being design defect, in the time of combination dilatation, often occur that system layout is mixed and disorderly, cable laying staggered, equipment uses the phenomenons such as overlapping, cause the cost of electricity-generating of photovoltaic power station system to raise, stability, reliability, fail safe, maintainability reduce greatly.We find through multiple photovoltaic plant case studies, have not yet to see so far a specification, optimization, general, design and embodiment that can combination in any different capacity photovoltaic plant.
Utility model content
The purpose of this utility model is to provide can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, to solve the problem proposing in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
Can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, by photovoltaic generating system A, direct current conflux energy-storage system B, synchronous grid-connected inverting system C, multiple branch circuit line concentration boost bucking-out system D, monitoring collection scheduling system E and form for the grid-connected dilatation transformer substation system F that boosts of multimode combination dilatation, direct current energy that described photovoltaic generating system A sends confluxes through the direct current energy-storage system B that confluxes, and flow to synchronous grid-connected inverting system C, realize the inversion conversion of DC-AC, DC converting is boosted grid-connected through the multiple branch circuit line concentration bucking-out system D that boosts after becoming to exchange, and regulated and controled by monitoring collection scheduling system E, by photovoltaic generating system A, the direct current energy-storage system B that confluxes, synchronous grid-connected inverting system C, boost photovoltaic module power station 10 design powers of bucking-out system D and monitoring collection scheduling system E composition of multiple branch circuit line concentration are generally advisable with 1MW, in the time of multiple parallel combination dilatation, also need to carry out multiple branch circuit grid integration 35KV power network by the grid-connected dilatation transformer substation system F that independently boosts,
Described photovoltaic generating system A is made up of solar panel array 01, solar panel array 01 by the standard solar cell assembly of 250W-350W power section through 16 grades of series connection, 16 grades compose in parallel the square formation of confluxing, totally 16 square formations of confluxing compose in parallel 1MW photovoltaic generating module, the tracking mode array 010 that solar panel array 01 comprises fixed square formation and controlled by the automatic trace facility 02 of sunlight, fixed policy and tracking mode array 010 form complementary, tracking mode array 010 is by dynamic tracks sunlight, realize the compensation of solar panel generated output sooner or later, the power ratio of fixed square formation and tracking mode square formation is 1/2～1/5, concrete proportioning decides according to modular power and construction cost,
The described direct current energy-storage system B that confluxes is made up of direct current tandem pipeline facility 03, direct current tandem pipeline facility 03 is made up of the header box 030 being electrically connected, bus bar 031, DC bus tandem device 40, DC bus 032 and pipeline 033, header box 030 direct current output imports DC bus tandem device 40 through bus bar 031, then is exported by withstand voltage YJY23-1kV 3x185 direct current tandem bus 20; The described direct current energy-storage system B two ends of confluxing are also provided with DC bus I/O interface (1,2); Described direct current tandem pipeline facility 03 also comprises DC bus articulating device 30 in the time of multiple module paralleling dilatation, is convenient to external energy storage device 50 by DC bus articulating device 30;
Described synchronous grid-connected inverting system C is made up of the DC distribution switchgear 04 being electrically connected, shunt circuitbreaker 040, synchronous parallel network reverse unit 05, AC distribution switch cubicle 050 and self-powered controller switching equipment 06; Totally 2 of described synchronous parallel network reverse units 05, model is SPWM-500kW, they form two units synchronization parallel connections as DC-AC inversion core, a direct current input is divided into two shunt output distribution cabinets by DC distribution switchgear 04, the electric current after shunting is inputted respectively two synchronous parallel network reverse units 05 by shunt circuitbreaker 040, after two AC power distribution cabinet/AC distribution panel 050 inversions, be incorporated to AC boosting converting equipment 07; Described DC distribution switchgear 04 configures photovoltaic Special lightning protection device 041, possesses lightning Protection alarm function; Described synchronous grid-connected inverting system C has Anti-surging ability; Described synchronous parallel network reverse unit 05 has a pair of direct current input terminal sub-interface at least, and combining inverter exchanges outlet side and has a road three-phase alternating current outlet terminal sub-interface at least; Described AC distribution switch cubicle 050 has three-phase input wires terminal interface and three-phase outlet terminal sub-interface at least, and the alternating current interruption device that controlled by over-current detection protection is set between input and output;
The described multiple branch circuit line concentration bucking-out system D that boosts is the inversion step-up circuit that the box step-up transformer of the combining inverter of the synchronous parallel network reverse unit 05 based on photovoltaic module power station 10 and the Split type of AC boosting converting equipment 07 forms, and comprise that high voltage bus tandem device 070, high voltage bus 071, RSVG compensator 072 form boost bucking-out system with when this system as a branch road, the integrated system that the multiple branch circuit line concentration system recombinant being made up of multiple branch combinations forms, the inversion in bucking-out system D of boosting of described multiple branch circuit line concentration exchanges at the box step-up transformer input side of Split type respectively through two loop three-phase triangles inputs, input side has two-way three input wires terminal interface at least, step-up side is a loop phase three-wire three star output, access high voltage bus 071 through high voltage bus tandem device 070, and high voltage bus 071 is provided with two high-voltage bidirectional OUT interfaces (4, 5) be convenient to dilatation, step-up side is phase three-wire three star output interface, while use as 1MW module power station case become stepup transformer by inversion AC boosting to 35KV high pressure, and enter RSVG compensator 072 at High voltage output side joint, access 35KV power line through high voltage bus tandem device 070 again, described multiple branch circuit line concentration boosts in bucking-out system D, multiple branch roads are provided with DC transmission system YJY23-1kV 3x185 DC bus 032 and form direct current line concentration transmitting loop through 40 tandems of DC bus tandem device, the 35KV high voltage bus 071 of high voltage power transmisson system YJY23-26/35kV 3x50 forms high pressure current collection transmitting loop through 070 output of high voltage bus tandem device, in the time of parallel combination dilatation high voltage power transmisson system the YJY23-26/35kV3x50 high voltage bus 071 by photovoltaic module power station 10 through 70 tandems of current collection bus tandem device on YJY23-26/35kV 3x75 high pressure current collection bus 60, access again RSVG compensator 072 and form boosting transformer 100, form high pressure line concentration transmitting loop through 70 tandems of current collection bus tandem device to YJY23-26/35kV 3x150 high-voltage bus 101, finally be incorporated to 35KV power network, current collection bus tandem device 70 comprises high voltage bus tandem device 070 repertoire, identical device and identical laying with DC bus tandem device 40,
Described monitoring collection scheduling system E is made up of the monitoring controlling equipment 09 being electrically connected, controlling bus 090, Bussing connector 091 and controlling bus interface 3; Described monitoring collection scheduling system E, electrical network power frequency component is taken to the front end power line trackside in RSVG compensator 072 loop, enter the monitoring controlling equipment 09 of system side from 35kV power line trackside tieback by outer supplying electricity and power distribution equipment 08, and through controlling bus 090 and Bussing connector 091 respectively with header box 030, sunshine tracking compensated array 02, DC distribution switchgear 04, synchronize parallel network reverse unit 05 and AC boosting converting equipment 07 and form electrical connection, when multiple photovoltaic modules power station 10 is parallel extended, realize in parallel by controlling bus interface 3.
The described grid-connected dilatation transformer substation system F that boosts, is the basis based on AC boosting converting equipment 07 and the autonomous system that builds, AC boosting converting equipment 07 configuration separately that is separated in the time of multiple module paralleling dilatation, the described grid-connected dilatation transformer substation system F that boosts is made up of high voltage bus 071, high pressure current collection bus 60, current collection bus tandem device 70, high-voltage bus 101, RSVG compensator 072, outer supplying electricity and power distribution equipment 08 and controlling bus interface 3, the described grid-connected dilatation transformer substation system F that boosts, while adopting " modularization is integrated, multiple branch circuit is grid-connected ", it is grid-connected that high voltage bus 071 will connect and compose multiple branch circuit as branch line and high pressure current collection bus 60, and save standalone module power station China and foreign countries supplying electricity and power distribution equipment 08, boosted and merge a set of equipment in grid-connected dilatation transformer substation system F and use and move to 35KV, the grid-connected grade of boosting is generally 35KV also scalable 110KV of backward compatible 10KV, and multiple branch circuit is grid-connected is that a tributary unit is set to suitable by 10 megawatts, the described grid-connected dilatation transformer substation system F that boosts, add RSVG compensation way and form voltage boosting transforming system and be incorporated to 35KV power network when adopting when independent photovoltaic module power station 10 by the Split type transformation of boosting, in the time combining for multiple module paralleling, AC boosting converting equipment 07 will upgrade to the grid-connected dilatation transformer substation system F that boosts also by 35KV high voltage bus 071, high pressure current collection bus 60 and 70 tandems of current collection bus tandem device enter boosting transformer 100, realize the grid-connected dilatation of multiple branch circuit line concentration through high-voltage bus 101 is grid-connected again, the RSVG compensator 072 of each branch road and outer supplying electricity and power distribution equipment 08 will be removed, and change into boosting centralized compensation and centrally connected power supply pattern in grid-connected dilatation transformer substation system F, reactive power compensation coefficient is generally set in 1/10 left and right of gross power and is advisable, thereby form the grid-connected dilatation transformer substation system of 35KV.
Described can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, when multiple module paralleling combines super photovoltaic plant, by the photovoltaic module power station 10 being electrically connected, direct current tandem bus 20, DC bus segmental apparatus 30, DC bus tandem device 40, energy storage device 50, high pressure current collection bus 60, current collection bus tandem device 70, integrated wire 80, watch-dog 90, boosting transformer 100 and high-voltage bus 101 form, and it is by direct current tandem bus 20, high pressure current collection bus 60 and integrated wire 80 three-lines by multiple photovoltaic modules power station 10 through DC bus I/O interface (1, 2), controlling bus interface 3 and high-voltage bidirectional OUT interface (4, 5) corresponding parallel combination, then with the 35KV electrical connection that the boosting transformer 100 of grid-connected dilatation transformer substation system F forms of boosting, be finally incorporated to 35KV power network, direct current tandem bus 20, high pressure current collection bus 60 and integrated wire 80 3 lines are non-cross, and realize energy storage and grid-connected dilatation generating by 20 in parallel multiple photovoltaic modules power stations 10 of direct current tandem bus and energy storage device 50.
Compared with prior art, the beneficial effects of the utility model are: 1. this system adds fixed solar panel square formation to follow the tracks of compensation square formation realization complementation by certain proportioning, in low-pressure side, DC bus is set simultaneously, direct current tandem bus, DC bus interface, high-pressure side arranges high voltage bus and high voltage bus interface, and be provided with the controlling bus interface of controlling bus and the boosting transformer of grid-connected dilatation transformer substation system F of boosting, thereby can realize the composition union net dilatation of multimode power station, upgrade to energy storing and electricity generating station or wind-light complementary energy storage power station, this structural design is high, low-voltage circuit is clearly demarcated, non-cross, whenever can be because of earthquake or other natural causes yet, human factor causes high-low pressure to disturb and the possibility overlapping, improve electric reliability, 2. the high and low pressure circuit of this system is non-cross, can lay and connect up without building the preset cable trench of cement by PVC pipe laying threading mode, under condition, the pipeline of DC side can also adopt coating steel pipe necessarily, replace on the one hand pvc pipe, the use of the direct direct current negative pole as photovoltaic battery matrix on the other hand, electrode cable and control cables are walked from pipe, can greatly reduce the laying construction cost of cable, can be used for the structure of low cost optical photovoltaic generating system.
Brief description of the drawings
Fig. 1 is can combination in any formula photovoltaic module power station and the system block diagram of the grid-connected dilatation transformer substation system that boosts.
Fig. 2 is can combination in any formula photovoltaic module power station and the electrical schematic diagram of the grid-connected dilatation transformer substation system that boosts.
Fig. 3 be can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts in the block diagram of boosting transformer.
Fig. 4 for can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts in direct current tandem pipeline facility schematic diagram.
Fig. 5 serves as reasons can combination in any formula photovoltaic module power station and the block diagram of the super photovoltaic plant of grid-connected dilatation transformer substation system parallel combination that boosts.
Fig. 6 serve as reasons can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts in DC bus tandem device schematic diagram.
Fig. 7 serve as reasons can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts in DC bus segmental apparatus schematic diagram.
Fig. 8 serve as reasons can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts in current collection bus tandem device schematic diagram.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, by photovoltaic generating system A, direct current conflux energy-storage system B, synchronous grid-connected inverting system C, multiple branch circuit line concentration boost bucking-out system D, monitoring collection scheduling system E and form for the grid-connected dilatation transformer substation system F that boosts of multimode combination dilatation, direct current energy that described photovoltaic generating system A sends confluxes through the direct current energy-storage system B that confluxes, and flow to synchronous grid-connected inverting system C, realize the inversion conversion of DC-AC, DC converting is boosted grid-connected through the multiple branch circuit line concentration bucking-out system D that boosts after becoming to exchange, and regulated and controled by monitoring collection scheduling system E, by photovoltaic generating system A, the direct current energy-storage system B that confluxes, synchronous grid-connected inverting system C, boost photovoltaic module power station 10 design powers of bucking-out system D and monitoring collection scheduling system E composition of multiple branch circuit line concentration are generally advisable with 1MW, in the time of multiple parallel combination dilatation, also need to carry out multiple branch circuit grid integration 35KV power network by the grid-connected dilatation transformer substation system F that independently boosts.
Described photovoltaic generating system A is made up of solar panel array 01, as shown in Figure 2, solar panel array 01 by the standard solar cell assembly of 250W-350W power section through 16 grades of series connection, 16 grades compose in parallel the square formation of confluxing, totally 16 square formations of confluxing compose in parallel 1MW photovoltaic generating module, the tracking mode array 010 that solar panel array 01 comprises fixed square formation and controlled by the automatic trace facility 02 of sunlight, fixed policy and tracking mode array 010 form complementary, tracking mode array 010 is by dynamic tracks sunlight, realize the compensation of solar panel generated output sooner or later, the power ratio of fixed square formation and tracking mode square formation is 1/2～1/5, concrete proportioning decides according to modular power and construction cost, compensation proportioning is 1/2 o'clock, compensation effect is best, but construction cost is high, compensation proportioning is lower, cost is lower, but compensation effect is poorer, lower than 1/5 o'clock, compensation effect is not obvious, described solar panel array 01 determines the quantity of solar panel operating voltage and series connection by the maximum input voltage of combining inverter, minimum operating voltage, determine the quantity of solar panel series and parallel by the grid-connected rated power of maximum, described fixed square formation sensitive surface is arranged with landform due south, and and horizontal plane between there is certain angle, make it keep sunlight direct projection, the design load of array pitch meets in the time that the winter solstice, sun altitude was minimum, and the hours of daylight on photovoltaic cell component is the longest, described tracking mode array 010 is built comparatively independent and the superior position of illumination in, to efficiently follow the tracks of sunshine, the solar panel array 01 of traditional photovoltaic plant is all directly to be formed and be electrically connected with DC distribution switchgear 04 or with multiple line bank terminals of combining inverter by header box 030 output, this means that this photovoltaic array can only work alone, therefore, the combining inverter shutdown of breaking down in any one square formation when multiple square formations combination dilatation, the electric energy of this square formation cannot be supplied with other square formations and realize power equalization, in addition when a square formation district is just in time by cloud shading inactivity output or power during lower than threshold value, this combining inverter will be forced to quit work or cause and unstablely restart.
The described direct current energy-storage system B that confluxes is made up of direct current tandem pipeline facility 03, direct current tandem pipeline facility 03 is made up of the header box 030 being electrically connected, bus bar 031, DC bus tandem device 40, DC bus 032 and pipeline 033, as shown in Figure 4, header box 030 direct current output imports DC bus tandem device 40 through bus bar 031, then is exported by withstand voltage YJY23-1kV3x185 direct current tandem bus 20, the described direct current energy-storage system B two ends of confluxing are also provided with DC bus I/O interface (1,2), described direct current tandem pipeline facility 03 also comprises DC bus articulating device 30 in the time of multiple module paralleling dilatation, is convenient to external energy storage device 50 by DC bus articulating device 30, it is 1000V above (containing 1000V) that described header box 030 can bear the total open circuit voltage of maximum series-connected solar cells plate, have 16 align, negative terminals, permission maximum current >=the 10A of every road battery tandem, positive pole over the ground, negative pole over the ground, rated current >=15kA also should be set between both positive and negative polarity, maximum current >=40kA, the lightning protection device of Up value in 5kV, possesses intelligent detection unit, RS485 interface and wireless (for ZIGBEE communication) interface, export independent access grid-connected inverter or be connected in series the access of last You Yi road by each header box 030 output interface by each road header box 030 direct current of traditional design, there is many technical problems in this way, such as serial connection method must accomplish header box of every increase by 030 its serial connection cross-section of cable is long-pending need to increase progressively at double, otherwise current density cannot ensure the power confluxing, set up after DC bus 032 and DC bus tandem device 40 and adopt, header box 030 to the line distance of DC bus 032 can be accomplished the shortest, and keep unified access length to reduce pressure drop, DC bus 032 can also and connect with other unit in access grid-connected inverter, thereby multiple solar panel arrays 01 can be got up in DC side tandem, the benefit of such design band is to be convenient to realize between adjacent multiple solar panel array 01 the direct current power dynamic compensation equilibrium under cloudy photoenvironment, in addition owing to being provided with DC bus 032, direct current tandem bus 20, DC bus articulating device 30 accesses energy storage device 50 can conveniently escalate into energy-accumulating power station, can also escalate into wind-light complementary energy storage power station.
Described synchronous grid-connected inverting system C is made up of the DC distribution switchgear 04 being electrically connected, shunt circuitbreaker 040, synchronous parallel network reverse unit 05, AC distribution switch cubicle 050 and self-powered controller switching equipment 06, as shown in Figure 2, totally 2 of described synchronous parallel network reverse units 05, model is SPWM-500kW, they form two units synchronization parallel connections as DC-AC inversion core, a direct current input is divided into two shunt output distribution cabinets by DC distribution switchgear 04, the electric current after shunting is inputted respectively two synchronous parallel network reverse units 05 by shunt circuitbreaker 040, after two AC power distribution cabinet/AC distribution panel 050 inversions, be incorporated to AC boosting converting equipment 07, such solution, safety and stability is reliable more to make system, especially any fault of converter of ac output end, can not affect another work working properly, described DC distribution switchgear 04 has three pairs of direct current input wires terminal interface at least, two pairs of direct current outlet terminal sub-interfaces, terminal board rated voltage should be not less than DC1000V, two shunt DC circuit breakers 040 are respectively joined in two pairs of direct current outputs, rated current capacity 1250A, power capacity is greater than 1MW, wherein a pair ofly in the middle of the three pairs of direct current input wires terminals be always the access of confluxing of this unit direct current, two pairs of left and right are respectively the outer unit direct current interface that confluxes, so just form DC bus 032, adopt this set to avoid I/O cable to intersect completely, DC distribution switchgear 04 configures photovoltaic Special lightning protection device 041, possesses lightning Protection alarm function, nominal discharge current is greater than 40kA, residual voltage is less than 5kV, described synchronous grid-connected inverting system C has Anti-surging ability, can bear simulation thunderbolt voltage waveform 10/700us, the impact that amplitude is 5kV 5 times, simulation thunder-strike current waveform 8/20 μ s, amplitude is the impact 5 times of 20kA, and every sudden strain of a muscle is impacted and is spaced apart 1min, and equipment still can normally be worked, described synchronous parallel network reverse unit 05 has a pair of direct current input terminal sub-interface at least, terminal board rated voltage should be not less than DC1000V, combining inverter exchanges outlet side and has a road three-phase alternating current outlet terminal sub-interface at least, inversion output AC voltage is generally 50Hz (60Hz) phase voltage AC315V, do not get rid of and adopt other standards alternating voltage, terminal board rated voltage should be not less than AC1000V, described AC distribution switch cubicle 050 has three-phase input wires terminal interface and three-phase outlet terminal sub-interface at least, and the alternating current interruption device that controlled by over-current detection protection is set between input and output, the general employing of traditional mode two DC power distribution cabinets add two inverters and add two AC distribution cabinets, be called for short " 222 " combination, or two DC power distribution cabinet add two inverters and add an AC distribution cabinet, combine referred to as " 221 ", or one DC power distribution cabinet add two inverters and add an AC distribution cabinet, combine referred to as " 121 ", all there is technological deficiency separately in these several structures, the overlapping cost of " 222 " structural device is high, " 221 " structural device is moderate but technology is unreasonable, " 121 " structural device is simplified but is deposited technological deficiency, in addition except " 222 " combination, once certain fault of converter of other structures will all be shut down, add two AC power distribution cabinet/AC distribution panel patterns and adopted direct current two shunt power distribution cabinets to add two inverters in the utility model, be called for short " 122 " combination, known according to inverter three-phase bridge drive principle, the any road DC distribution equipment of this structure, combining inverter or AC distribution equipment break down can not affect the normal work of another road combining inverter.
The described multiple branch circuit line concentration bucking-out system D that boosts is the inversion step-up circuit that the box step-up transformer of the combining inverter of the synchronous parallel network reverse unit 05 based on photovoltaic module power station 10 and the Split type of AC boosting converting equipment 07 forms, and comprise that high voltage bus tandem device 070, high voltage bus 071, RSVG compensator 072 form boost bucking-out system with when this system as a branch road, the integrated system that the multiple branch circuit line concentration system recombinant being made up of multiple branch combinations forms, the inversion in bucking-out system D of boosting of described multiple branch circuit line concentration exchanges at the box step-up transformer input side of Split type respectively through two loop three-phase triangles inputs, input side has two-way three input wires terminal interface at least, step-up side is a loop phase three-wire three star output, access high voltage bus 071 through high voltage bus tandem device 070, and high voltage bus 071 is provided with two high-voltage bidirectional OUT interfaces (4, 5) be convenient to dilatation, step-up side is phase three-wire three star output interface, while use as 1MW module power station case become stepup transformer by inversion AC boosting to 35KV high pressure, and enter RSVG compensator 072 at High voltage output side joint, access 35KV power line through high voltage bus tandem device 070 again, described multiple branch circuit line concentration boosts in bucking-out system D, multiple branch roads are provided with DC transmission system YJY23-1kV 3x185 DC bus 032 and form direct current line concentration transmitting loop through 40 tandems of DC bus tandem device, the 35KV high voltage bus 071 of high voltage power transmisson system YJY23-26/35kV 3x50 forms high pressure current collection transmitting loop through 070 output of high voltage bus tandem device, in the time of parallel combination dilatation high voltage power transmisson system the YJY23-26/35kV3x50 high voltage bus 071 by photovoltaic module power station 10 through 70 tandems of current collection bus tandem device on YJY23-26/35kV 3x75 high pressure current collection bus 60, access again RSVG compensator 072 and form boosting transformer 100, form high pressure line concentration transmitting loop through 70 tandems of current collection bus tandem device to YJY23-26/35kV 3x150 high-voltage bus 101, finally be incorporated to 35KV power network, current collection bus tandem device 70 comprises high voltage bus tandem device 070 repertoire, identical device and identical laying with DC bus tandem device 40, be mainly used in the laying of 35KV and above high-voltage line, its insulation is strong, the requirement of dielectric strength will improve thereupon.
Described monitoring collection scheduling system E is made up of the monitoring controlling equipment 09 being electrically connected, controlling bus 090, Bussing connector 091 and controlling bus interface 3, described monitoring collection scheduling system E, electrical network power frequency component is taken to the front end power line trackside in RSVG compensator 072 loop, enter the monitoring controlling equipment 09 of system side from 35kV power line trackside tieback by outer supplying electricity and power distribution equipment 08, and through controlling bus 090 and Bussing connector 091 respectively with header box 030, sunshine tracking compensated array 02, DC distribution switchgear 04, synchronous parallel network reverse unit 05 and AC boosting converting equipment 07 form electrical connection, realize power supply, the functions such as sampling, monitoring and controlling system adopts bus communication, microcomputer management system is realized power frequency, electric current, voltage, power, temperature, humidity, the collection of the multi-parameters such as environment and monitoring, realize the remote scheduling of grid-connected electric power simultaneously, when multiple photovoltaic modules power station 10 is parallel extended, realize in parallel by controlling bus interface 3.
The described grid-connected dilatation transformer substation system F that boosts, is the basis based on AC boosting converting equipment 07 and the autonomous system that builds, AC boosting converting equipment 07 configuration separately that is separated in the time of multiple module paralleling dilatation, as shown in Figure 3, the described grid-connected dilatation transformer substation system F that boosts is made up of high voltage bus 071, high pressure current collection bus 60, current collection bus tandem device 70, high-voltage bus 101, RSVG compensator 072, outer supplying electricity and power distribution equipment 08 and controlling bus interface 3, the described grid-connected dilatation transformer substation system F that boosts, while adopting " modularization is integrated, multiple branch circuit is grid-connected ", it is grid-connected that high voltage bus 071 will connect and compose multiple branch circuit as branch line and high pressure current collection bus 60, and save standalone module power station China and foreign countries supplying electricity and power distribution equipment 08, boosted and merge a set of equipment in grid-connected dilatation transformer substation system F and use and move to 35KV, the grid-connected grade of boosting is generally 35KV also scalable 110KV of backward compatible 10KV, and multiple branch circuit is grid-connected is that a tributary unit is set to suitable by 10 megawatts, the described grid-connected dilatation transformer substation system F that boosts, add RSVG compensation way and form voltage boosting transforming system and be incorporated to 35KV power network when adopting when independent photovoltaic module power station 10 by the Split type transformation of boosting, in the time combining for multiple module paralleling, AC boosting converting equipment 07 will upgrade to the grid-connected dilatation transformer substation system F that boosts also by 35KV high voltage bus 071, high pressure current collection bus 60 and 70 tandems of current collection bus tandem device enter boosting transformer 100, realize the grid-connected dilatation of multiple branch circuit line concentration through high-voltage bus 101 is grid-connected again, the RSVG compensator 072 of each branch road and outer supplying electricity and power distribution equipment 08 will be removed, and change into boosting centralized compensation and centrally connected power supply pattern in grid-connected dilatation transformer substation system F, reactive power compensation coefficient is generally set in 1/10 left and right of gross power and is advisable, thereby form the grid-connected dilatation transformer substation system of 35KV.
Described can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, when multiple module paralleling combines super photovoltaic plant, as shown in Fig. 5～8, by the photovoltaic module power station 10 being electrically connected, direct current tandem bus 20, DC bus segmental apparatus 30, DC bus tandem device 40, energy storage device 50, high pressure current collection bus 60, current collection bus tandem device 70, integrated wire 80, watch-dog 90, boosting transformer 100 and high-voltage bus 101 form, and it is by direct current tandem bus 20, high pressure current collection bus 60 and integrated wire 80 three-lines by multiple photovoltaic modules power station 10 through DC bus I/O interface (1, 2), controlling bus interface 3 and high-voltage bidirectional OUT interface (4, 5) corresponding parallel combination, then with the 35KV electrical connection that the boosting transformer 100 of grid-connected dilatation transformer substation system F forms of boosting, be finally incorporated to 35KV power network, direct current tandem bus 20, high pressure current collection bus 60 and integrated wire 80 3 lines are non-cross, and realize energy storage and grid-connected dilatation generating by 20 in parallel multiple photovoltaic modules power stations 10 of direct current tandem bus and energy storage device 50.
As can be seen here, the utility model is that Unit Design becomes photovoltaic module power station by common photovoltaic generating system by 1MW power, and fixed solar panel square formation is added and follows the tracks of compensation square formation realization complementation by certain proportioning, while arranges DC bus 032, direct current tandem bus 20 and DC bus interface (1,2) in low-pressure side, high-pressure side arranges high voltage bus 071 and high voltage bus interface (4,5), and is provided with the controlling bus interface 3 of controlling bus 090 and the boosting transformer 100 of the grid-connected dilatation transformer substation system F that boosts; The benefit of bringing is thus to realize the composition union net dilatation of multimode power station, upgrades to energy storing and electricity generating station or wind-light complementary energy storage power station, this structural design high and low pressure circuit is clearly demarcated, non-cross, whenever also not can because of earthquake or other natural causes, human factor cause high-low pressure disturb with overlap joint may, improved electric reliability; Can lay and without building the preset cable trench wiring of cement by PVC pipe laying threading mode because the high and low pressure circuit of the utility model design is non-cross in addition, under condition, the pipeline of DC side can also adopt coating steel pipe necessarily, replace on the one hand pvc pipe, the use of the direct direct current negative pole as photovoltaic battery matrix on the other hand, electrode cable and control cables are walked from pipe, the laying construction cost that can greatly reduce cable, this mode can be used for the structure of low cost optical photovoltaic generating system.
To those skilled in the art, obviously the utility model is not limited to the details of above-mentioned example embodiment, and in the situation that not deviating from spirit of the present utility model or essential characteristic, can realize the utility model with other concrete form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, is therefore intended to all changes that drop in the implication and the scope that are equal to important document of claim to include in the utility model.Any Reference numeral in claim should be considered as limiting related claim.
In addition, be to be understood that, although this specification is described according to execution mode, but be not that each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should make specification as a whole, and the technical scheme in each embodiment also can, through appropriately combined, form other execution modes that it will be appreciated by those skilled in the art that.
Claims (8)
1. can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, comprise photovoltaic generating system A, direct current conflux energy-storage system B, synchronous grid-connected inverting system C, multiple branch circuit line concentration boost bucking-out system D and monitoring collection scheduling system E; It is characterized in that: described can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts also comprise the grid-connected dilatation transformer substation system F that boosts for multimode combination dilatation; Direct current energy that described photovoltaic generating system A sends confluxes through the direct current energy-storage system B that confluxes, flow to synchronous grid-connected inverting system C, boost grid-connected through the multiple branch circuit line concentration bucking-out system D that boosts, and regulated and controled by monitoring collection scheduling system E, form photovoltaic module power station 10 by photovoltaic generating system A, direct current boost bucking-out system D and the monitoring collection scheduling system E of energy-storage system B, synchronous grid-connected inverting system C, multiple branch circuit line concentration that conflux, by independently boosting, grid-connected dilatation transformer substation system F carries out multiple branch circuit grid integration 35KV power network.
2. according to claim 1 can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, it is characterized in that: described photovoltaic generating system A is made up of solar panel array (01), the tracking mode array (010) that solar panel array (01) comprises fixed square formation and controlled by the automatic trace facility of sunlight (02), the power ratio of fixed square formation and tracking mode square formation (010) is 1/2～1/5.
3. according to claim 1 can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, it is characterized in that: described direct current confluxes energy-storage system B by direct current tandem pipeline facility (03) formation, and direct current tandem pipeline facility (03) is made up of the header box being electrically connected (030), bus bar (031), DC bus tandem device (40), DC bus (032) and pipeline (033); The output of described header box (030) direct current imports DC bus tandem device (40) through bus bar (031), then is exported by direct current tandem bus (20); The described direct current energy-storage system B two ends of confluxing are also provided with DC bus I/O interface (1) and DC bus I/O interface (2); Described direct current tandem pipeline facility (03) also comprises DC bus articulating device (30).
4. according to claim 1 can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, it is characterized in that: described synchronous grid-connected inverting system C is by the DC distribution switchgear (04) being electrically connected, shunt circuitbreaker (040), synchronous parallel network reverse unit (05), AC distribution switch cubicle (050) and self-powered controller switching equipment (06) formation; Totally 2 of described synchronous parallel network reverse units (05), a direct current input is divided into two shunt output distribution cabinets by DC distribution switchgear (04), the electric current after shunting is inputted respectively two synchronous parallel network reverse units (05) by shunt circuitbreaker (040), by two AC power distribution cabinet/AC distribution panels (050) inversion, be incorporated to AC boosting converting equipment (07); Described DC distribution switchgear (04) configuration photovoltaic Special lightning protection device (041); Described synchronous parallel network reverse unit (05) has a pair of direct current input terminal sub-interface at least, and combining inverter exchanges outlet side and has a road three-phase alternating current outlet terminal sub-interface at least; Described AC distribution switch cubicle (050) has three-phase input wires terminal interface and three-phase outlet terminal sub-interface at least, and the alternating current interruption device that controlled by over-current detection protection is set between input and output.
5. according to claim 1 can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, it is characterized in that: the described multiple branch circuit line concentration bucking-out system D that boosts is the integrated system being made up of inversion step-up circuit and multiple branch circuit line concentration system, described inversion step-up circuit is to be made up of the combining inverter of the synchronous parallel network reverse unit (05) based on photovoltaic module power station (10) and the box step-up transformer of the Split type of AC boosting converting equipment (07); Described multiple branch circuit line concentration system comprises multiple branch roads, and each branch road all comprises the bucking-out system of boosting being made up of high voltage bus tandem device (070), high voltage bus (071) and RSVG compensator (072); The inversion in bucking-out system D of boosting of described multiple branch circuit line concentration exchanges at the box step-up transformer input side of Split type respectively through two loop three-phase triangles inputs, input side has two-way three input wires terminal interface at least, step-up side is a loop phase three-wire three star output, through high voltage bus tandem device (070) access high voltage bus (071), high voltage bus (071) is provided with high-voltage bidirectional OUT interface (4) and high-voltage bidirectional OUT interface (4), and step-up side is phase three-wire three star output interface; Described multiple branch circuit line concentration boosts in bucking-out system D, multiple branch roads are provided with DC transmission system DC bus (032) and form direct current line concentration transmitting loop through DC bus tandem device (40) tandem, and the high voltage bus (071) of high voltage power transmisson system forms high pressure current collection transmitting loop through high voltage bus tandem device (070) output.
6. according to claim 1 can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, it is characterized in that: the described multiple branch circuit line concentration bucking-out system D that boosts, when parallel combination dilatation, high voltage power transmisson system is by the high voltage bus (071) in photovoltaic module power station (10), through current collection bus tandem device (70) tandem on high pressure current collection bus (60), access again RSVG compensator (072) and form boosting transformer (100), form high pressure line concentration transmitting loop through current collection bus tandem device (70) tandem to high-voltage bus (101), finally be incorporated to 35KV power network, current collection bus tandem device (70) comprises high voltage bus tandem device (070) repertoire, identical device and identical laying with DC bus tandem device (40).
7. according to claim 1 can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, it is characterized in that: described monitoring collection scheduling system E is made up of the monitoring controlling equipment (09) being electrically connected, controlling bus (090), Bussing connector (091) and controlling bus interface (3), described monitoring collection scheduling system E, electrical network power frequency component is taken to the front end power line trackside in RSVG compensator (072) loop, enter the monitoring controlling equipment (09) of system side from 35kV power line trackside tieback by outer supplying electricity and power distribution equipment (08), and through controlling bus (090) and Bussing connector (091) respectively with header box (030), sunshine tracking compensated array (02), DC distribution switchgear (04), synchronous parallel network reverse unit (05) and AC boosting converting equipment (07) form electrical connection, multiple photovoltaic modules power station (10) is realized in parallel by controlling bus interface (3).
8. according to claim 1 can combination in any formula photovoltaic module power station and the grid-connected dilatation transformer substation system that boosts, it is characterized in that: described in the grid-connected dilatation transformer substation system F that boosts, the basis based on AC boosting converting equipment (07) and the autonomous system that builds, for the configuration separately that is separated of the AC boosting converting equipment (07) of multiple module paralleling dilatation, the described grid-connected dilatation transformer substation system F that boosts is made up of high voltage bus (071), high pressure current collection bus (60), current collection bus tandem device (70), high-voltage bus (101), RSVG compensator (072), outer supplying electricity and power distribution equipment (08) and controlling bus interface (3), the described grid-connected dilatation transformer substation system F that boosts, it is grid-connected that high voltage bus (071) connects and composes multiple branch circuit as branch line and high pressure current collection bus (60), and save standalone module power station China and foreign countries supplying electricity and power distribution equipment (08), boosted and merge a set of equipment in grid-connected dilatation transformer substation system F and use and move to 35KV, the described grid-connected dilatation transformer substation system F that boosts, while adopting independent photovoltaic module power station (10), add RSVG compensation way and form voltage boosting transforming system and be incorporated to 35KV power network by the Split type transformation of boosting, during for multiple module paralleling combination, AC boosting converting equipment (07) upgrades to the grid-connected dilatation transformer substation system F that boosts also by high voltage bus (071), high pressure current collection bus (60) and current collection bus tandem device (70) tandem enter boosting transformer (100), realize the grid-connected dilatation of multiple branch circuit line concentration through high-voltage bus (101) is grid-connected again, RSVG compensator (072) and the outer supplying electricity and power distribution equipment (08) of each branch road are removed, change in centralized compensation and the centrally connected power supply pattern in grid-connected dilatation transformer substation system F of boosting, reactive power compensation coefficient settings is 1/10 of gross power.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111697626A (en) * | 2020-07-02 | 2020-09-22 | 阳光电源股份有限公司 | Photovoltaic power station, power generation control method and string inverter |
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