CN204992375U - Step -down is incorporated into power networks and is assembled substation room in advance - Google Patents
Step -down is incorporated into power networks and is assembled substation room in advance Download PDFInfo
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- CN204992375U CN204992375U CN201520461851.6U CN201520461851U CN204992375U CN 204992375 U CN204992375 U CN 204992375U CN 201520461851 U CN201520461851 U CN 201520461851U CN 204992375 U CN204992375 U CN 204992375U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
The utility model discloses a step -down is incorporated into power networks and is assembled substation room in advance, including photovoltaic inverter, transformer, dc -to -ac converter room and transformer room. Photovoltaic inverter sets up in the dc -to -ac converter indoorly, and the transformer sets up in the transformer room, connects through the copper bar between dc -to -ac converter room and the transformer room. Photovoltaic inverter includes direct current breaker, steady voltage electric capacity, three -phase inverting bridge, wave filter, alternating current circuit ware and pressure reduction means, and wherein this direct current breaker includes third switch (S1), and this third switch (S1) sets up on privates (L0), and this pressure reduction means includes precharging resistor (R1) and non -linear resistor (R2). Precharging resistor's (R1) one end is connected with the anodal electricity of steady voltage electric capacity, and the other end is through being connected with privates (L0) electricity. Other end ground connection is connected to non -linear resistor's (R2) one end and privates (L0) electricity. The utility model discloses a step -down is incorporated into power networks and is assembled substation room in advance can improve photovoltaic inverter's capacity.
Description
Technical field
The utility model relates to field of solar thermal power generation, is specifically related to a kind of step-down combining pre-assembled point of station.
Background technology
Solar energy has the advantages such as safe, clean and resource generality, can become the regenerative resource that alternative fossil energy is main.Solar energy power generating in its developmental research, market development and industrialized manufacture technology already as the focus of world community keen competition.
Pre-assembled point of traditional station has following defect:
(1) pre-assembled point of traditional station requires that commissioning staff must debug inverter at device interior, threatens the personal safety of personnel;
(2) secondary control system adopts singlechip technology or DSP control technology, and the impact that its master control borad is subject to the factors such as layout structure, mask-making technology and device quality is obvious, poor anti jamming capability, not easily expand, rate of failure is higher, and strong to surrounding environment dependence, the construction cycle is long;
(3) time due to pre-charge process, capacitor maximum withstand voltage be the open circuit voltage of photovoltaic array, that is withstand voltage open circuit voltage that must be greater than photovoltaic array of the power device of photovoltaic DC-to-AC converter.Therefore, when the group string of photovoltaic array, the open circuit voltage of the photovoltaic module of going here and there should not be greater than the withstand voltage of power device of inverter, and pre-assembled point of therefore traditional station exists the low defect of photovoltaic inverter grid-connected capacity.
Utility model content
The purpose of this utility model is to provide a kind of step-down combining pre-assembled point of station, to solve above-mentioned problems of the prior art.
According to an aspect of the present utility model, provide a kind of step-down combining pre-assembled point of station, described step-down combining pre-assembled point of station comprises photovoltaic DC-to-AC converter, transformer, inverter room and transformer room, it is indoor that described photovoltaic DC-to-AC converter is arranged at described inverter, described transformer is arranged in described transformer room, and is connected by copper bar between described inverter room and described transformer room; Described photovoltaic DC-to-AC converter comprises DC circuit breaker, electric capacity of voltage regulation, three phase inverter bridge, filter, AC circuit breaker and dropping equipment; Wherein said DC circuit breaker comprises the 3rd switch (S
1), the 3rd switch (S
1) be arranged at privates (L
0) on, described dropping equipment comprises pre-charge resistance (R
1) and nonlinear resistance (R
2), described pre-charge resistance (R
1) one end be electrically connected with the positive pole of described electric capacity of voltage regulation, described pre-charge resistance (R
1) the other end by the first wire (L
1) and described privates (L
0) electrical connection, described nonlinear resistance (R
2) one end by the second wire (L
2) and described privates (L
0) electrical connection, described nonlinear resistance (R
2) other end ground connection, and at described first wire (L
1) be provided with the first switch (QB
1) and at described second wire (L
2) be provided with second switch (QB
2).
Preferably, described dropping equipment also comprises CPU module, the first relay and the second relay, wherein, described first relay is electrically connected with described first switch, described second relay is electrically connected with described second switch, and described CPU module is electrically connected with described first relay and described second relay respectively.
Preferably, described nonlinear resistance is adjustable resistance.
Preferably, described dropping equipment also comprises power supply, and described power supply is electrically connected with described first relay, described second relay and described CPU module thus provides electric energy for described first relay, described second relay and described CPU module.
Preferably, described pre-charge resistance is linear resistance.
Preferably, described inverter room comprises direct current and converges line cabinet, inverter bridge room, filter chamber and exchange and export room, and wherein said DC circuit breaker and described dropping equipment are arranged at that described direct current converges in line cabinet, described electric capacity of voltage regulation and three phase inverter bridge are arranged at that described inverter bridge is indoor, described filter is arranged in described filter chamber and described AC circuit breaker is arranged at described interchange and exports indoor.
Preferably, described direct current remittance line cabinet, inverter bridge room, filter chamber and interchange export room and are respectively equipped with window, can be debugged by described window to described DC circuit breaker, dropping equipment, electric capacity of voltage regulation, three phase inverter bridge and filter.
Preferably, described direct current remittance line cabinet, inverter bridge room, filter chamber and interchange export indoor and are respectively equipped with heat abstractor.
Preferably, described step-down combining pre-assembled point of station comprises two photovoltaic DC-to-AC converters and two cover inverter rooms, and inverter indoor described in every suit arrange a described photovoltaic DC-to-AC converter.
Preferably, described step-down combining pre-assembled point of station also comprises lightning arrester, lightning-arrest counter, the relay detecting power transformer interior fault and hyperbaric chamber, and the relay of described lightning arrester, lightning-arrest counter and detection power transformer interior fault is arranged in described hyperbaric chamber.
Step-down combining of the present utility model pre-assembled point of station adopts floor plan, and offers window in the outside of step-down combining pre-assembled point of station, and commissioning staff can carry out debugging efforts in outside, and fail safe is protected.Secondly, reduce grid-connected open circuit voltage by dropping equipment, the capacity of photovoltaic DC-to-AC converter can be improved; Solve the too high equipment that causes of photovoltaic module open circuit voltage under extreme cold condition simultaneously and certainly can not open problem; Again, by adding dropping equipment, effectively prevent the problem of operating voltage lower than MPPT minimum voltage of existence when grid-connected header box amount is lacked.
Accompanying drawing explanation
Fig. 1 is the system connection diagram of step-down combining of the present utility model pre-assembled point of station;
Fig. 2 is the side schematic view of step-down combining of the present utility model pre-assembled point of station;
Fig. 3 is the floor map of step-down combining of the present utility model pre-assembled point of station;
Fig. 4 is the connection diagram of the photovoltaic DC-to-AC converter of step-down combining of the present utility model pre-assembled point of station; And
Fig. 5 is the control schematic diagram of the CPU module of the photovoltaic DC-to-AC converter of step-down combining of the present utility model pre-assembled point of station.
Embodiment
Below with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail, understands the purpose of this utility model, feature and advantage so that clearer.It should be understood that embodiment shown in the drawings is not the restriction to the utility model scope, and the connotation just in order to technical solutions of the utility model are described.
Term explanation
Divide station: electric equipment photovoltaic DC-to-AC converter and box-type substation become one, the DC conversion that photovoltaic arrays produces by this system is alternating current, and completes once boosting supply electrical network use.
Photovoltaic DC-to-AC converter: by power electronic device (MOSFET, IGBT etc.) contact resistance electric capacity, with the break-make of the mode control device of pulse width modulation, the direct current that header box transmission comes is transformed into alternating current, complete the MPPT maximum power point tracking (MPPT) of photovoltaic module simultaneously, ensure Based Intelligent Control and anti-islanding effect etc.
Pre-charge resistance: inverter DC bus capacitance before charging both end voltage be zero, be equivalent to short circuit in the moment of equipment charge, very large impulse current can be produced, be easy to cause the power device of inverter to damage.Therefore need to connect a resistance at charge circuit in pre-charge process, to play the effect of Limited Current.This resistance is just called pre-charge resistance.
Electric capacity of voltage regulation: a voltage source positive and negative terminal electric capacity in parallel, during for the circuit such as copped wave, inversion, has good filter action; When change in voltage, due to the effect of capacitance energy storage, the voltage at two ends can not suddenly change, and just ensure that the steady of voltage.
Upstream voltage: DC circuit breaker point of incoming cables port voltage.
Step-down combining of the present utility model pre-assembled point of station generally includes photovoltaic DC-to-AC converter, transformer, inverter room and transformer room.Wherein photovoltaic DC-to-AC converter is arranged at inverter indoor, and transformer is arranged in transformer room, and is connected by copper bar between inverter room and transformer room.Photovoltaic DC-to-AC converter comprises DC circuit breaker, electric capacity of voltage regulation, three phase inverter bridge, filter, AC circuit breaker and dropping equipment; Wherein this DC circuit breaker comprises the 3rd switch (S
1), the 3rd switch (S
1) be arranged at privates (L
0) on, this dropping equipment comprises pre-charge resistance (R
1) and nonlinear resistance (R
2), this pre-charge resistance (R
1) one end be electrically connected with the positive pole of this electric capacity of voltage regulation, this pre-charge resistance (R
1) the other end by the first wire (L
1) and this privates (L
0) electrical connection, this nonlinear resistance (R
2) one end by the second wire (L
2) and this privates (L
0) electrical connection, this nonlinear resistance (R
2) other end ground connection, and at this first wire (L
1) be provided with the first switch (QB
1) and at this second wire (L
2) be provided with second switch (QB
2).
Fig. 1 is the system connection diagram of step-down combining of the present utility model pre-assembled point of station; Fig. 2 is the side schematic view of step-down combining of the present utility model pre-assembled point of station; Fig. 3 is the floor map of step-down combining of the present utility model pre-assembled point of station.As shown in Figures 1 to 3, step-down combining pre-assembled point of station comprises two photovoltaic DC-to-AC converters, 100, transformer 200, inverter room 100A, transformer room 9 and hyperbaric chamber 11.Although in the present embodiment, step-down combining pre-assembled point of station comprises hyperbaric chamber 11, but those skilled in the art will appreciate that step-down combining of the present utility model pre-assembled point of station also can not comprise hyperbaric chamber 11.Wherein photovoltaic DC-to-AC converter 100 is arranged in the 100A of inverter room, and transformer 200 is arranged in transformer room 9, is connected between inverter room 100A and transformer room 200A by copper bar.
As shown in Figure 1, photovoltaic DC-to-AC converter 100 comprises DC circuit breaker 10, electric capacity of voltage regulation 20, three phase inverter bridge 30, filter 40, AC circuit breaker 50 and dropping equipment.Wherein, DC circuit breaker 10, electric capacity of voltage regulation 20, three phase inverter bridge 30, filter 40 and AC circuit breaker 50 are electrically connected successively, and DC circuit breaker 10 is for connecting photovoltaic module, and AC circuit breaker 50 is for connection transformer 200.Dropping equipment comprises CPU module 51, first relay 52, power supply 53, pre-charge resistance R
1, nonlinear resistance R
2, the first wire L
1, the second wire L
2, the first switch QB
1and second switch QB
2.Wherein, the first relay 52 and the second relay 54 are two and open two and close independent contact.
As shown in figures 2-3, inverter room 100A comprises direct current and converges line cabinet 1, inverter bridge room 4, filter chamber 5 and exchange and export room 7, and wherein DC circuit breaker 10 and dropping equipment are arranged at that direct current converges in line cabinet 1, electric capacity of voltage regulation 20 is arranged in inverter bridge room 4 with three phase inverter bridge 30, filter 40 is arranged in filter chamber 5 and AC circuit breaker 50 is arranged at and exchanges in output room 7.
Direct current remittance line cabinet 1 offers window 1A, inverter bridge room 4 offers window 4A, filter chamber 5 offers window 5A, exchange output room 7 and offer window 7A, hyperbaric chamber 11 offers window 11A, can be debugged DC circuit breaker 10, dropping equipment, electric capacity of voltage regulation 20, three phase inverter bridge 30 and AC circuit breaker 50 respectively by window 1A, 4A, 5A and 7A.
In direct current converges line cabinet 1, be provided with heat abstractor 1B, in inverter bridge room 4, be provided with heat abstractor 4B, in filter chamber 5, be provided with heat abstractor 5B, and be provided with heat abstractor 7B in interchange output room 7.By the effect of heat abstractor 1B, 4B, 5B and 7B, direct current remittance line cabinet 1, inverter bridge room 4, filter chamber 5 can be prevented and exchange the temperature exporting room 7 too high.
In the utility model, a step-down combining pre-assembled point of station comprises two photovoltaic DC-to-AC converters, 100, two inverter room 100A, a transformer 200, transformation room 9 and a hyperbaric chamber 11, wherein each inverter 100 is arranged in the 100A of each inverter room, transformer 200 is arranged in transformer room 9, and the relay (not shown) of lightning arrester, lightning-arrest counter and detection power transformer interior fault is arranged in hyperbaric chamber 11.
Fig. 4 is the connection diagram of the photovoltaic DC-to-AC converter 100 of step-down combining of the present utility model pre-assembled point of station.As shown in Figure 4, DC circuit breaker 10 comprises multiple switch, wherein the 3rd switch S
1be arranged at privates L
0on, pre-charge resistance R
1one end by the first wire L
1be connected to the positive pole of electric capacity of voltage regulation 20, pre-charge resistance R
1the other end by the first wire L
1be connected to privates L
0on, nonlinear resistance R
2one end by the second wire L
2be connected to privates L
0on, nonlinear resistance R
2other end ground connection, at the first wire L
1be provided with the first switch QB
1with at the second wire L
2be provided with second switch QB
2.Wherein, the 3rd switch S of DC circuit breaker 10
1again by privates L after in parallel with other all switches elder generations
0connect with electric capacity of voltage regulation 20.
In the present embodiment, nonlinear resistance R
2for adjustable resistance, by regulating nonlinear resistance R
2the 3rd switch S can be controlled
1the size of upstream voltage, and pre-charge resistance R
1for linear resistance, by pre-charge resistance R
1electric capacity of voltage regulation can be prevented breakdown,
Power supply 53 is electrically connected with the first relay 52, second relay 54 and CPU module 51, thus provides electric energy for the first relay 52, second relay 54 and CPU module 51.CPU module 51 is electrically connected with the first relay 52 and the second relay 54 thus sends instruction respectively to the first relay 52 and the second relay 54, and the first relay 52 and the second relay 54 receive the instruction from CPU module 51 and control the first switch QB
1with second switch QB
2opening and closing.
Fig. 5 is the schematic diagram of CPU module.As shown in Figure 5, CPU module can send signal 101,102,103,104,105 and 107, and wherein signal 101 controls the first switch QB
1close a floodgate; Signal 102 controls the first switch QB
1separating brake; Signal 103 controls second switch QB
2close a floodgate; Signal 104 controls second switch QB
2separating brake; Signal 105 controls the first switch QB
1close a point state; Signal 106 controls second switch QB
2close a point state; Signal 107 controls the 3rd switch S
1state.
When needing to open, undertaken by following process.
(1) press manual precharge button (not shown), CPU module sends signal 103 and makes the second relay 54 action, thus the second relay 54 controls second switch QB
2closed, wherein, by regulating nonlinear resistance R
2can control voltage U
1size;
(2) when the 3rd switch S 1 upstream electrical pressure is reduced to voltage U
1time, CPU module sends 101 signals and makes the first relay 52 action, thus controls the first switch QB
1closed, pre-charge resistance R
1on flow through electric current, electric capacity of voltage regulation 20 precharge.
(3) after electric capacity of voltage regulation 20 precharge completes, the 3rd switch S of closed DC circuit breaker 10
1with other all switches;
(4) after photovoltaic DC-to-AC converter meets entry condition, photovoltaic DC-to-AC converter is started;
(5) after described photovoltaic DC-to-AC converter parallel-adder settle-out time t, CPU module sends 104 signals and makes the second relay 54 action, thus cut-off switch second switch QB
2, thus complete the machine that the opens process of whole photovoltaic DC-to-AC converter.
In the utility model, the power output that time t is photovoltaic DC-to-AC converter is increased to the time needed for peak power output from 0.
Voltage U
1meet following relation: U
n≤ U
1<U
c, wherein U
nfor the maximum working voltage of photovoltaic DC-to-AC converter, U
cfor accessing the open circuit voltage of the photovoltaic module of photovoltaic DC-to-AC converter.
According to another aspect of the present utility model, additionally provide a kind of machine that opens method of photovoltaic DC-to-AC converter, photovoltaic DC-to-AC converter comprises DC circuit breaker, electric capacity of voltage regulation, three phase inverter bridge, filter, AC circuit breaker and dropping equipment, and wherein, described DC circuit breaker comprises the 3rd switch S
1, the 3rd switch S
1be arranged at privates L
0on, described dropping equipment comprises pre-charge resistance R
1with nonlinear resistance R
2, described pre-charge resistance R
1one end be electrically connected with the positive pole of described electric capacity of voltage regulation, described pre-charge resistance R
1the other end by the first wire L
1with described privates L
0electrical connection, one end of described nonlinear resistance is by the second wire L
2with described privates L
0electrical connection, the other end ground connection of described nonlinear resistance, and at described first wire L
1be provided with the first switch QB
1with at described second wire L
2be provided with second switch QB
2, wherein, said method comprising the steps of:
Step one, closed second switch QB
2;
Step 2, when the 3rd switch S
1upstream electrical pressure is reduced to voltage U
1time, closed first switch QB
1;
Step 3, when after electric capacity of voltage regulation 20 charging complete, the 3rd switch S of closed DC circuit breaker 10
1and other all switches;
Step 4, after photovoltaic DC-to-AC converter meets entry condition, start photovoltaic DC-to-AC converter;
Step 5, when after photovoltaic DC-to-AC converter parallel-adder settle-out time t, disconnect second switch QB
2, complete the machine that the opens process of whole photovoltaic DC-to-AC converter.
For the photovoltaic DC-to-AC converter of a certain specified output 750MW, superiority of the present utility model is described below.
The input of photovoltaic DC-to-AC converter, output performance parameter are respectively in table 1 and table 2.Access the parameter of photovoltaic module in table 3.
Table 1 photovoltaic DC-to-AC converter input parameter
| Maximum DC input power (kW) | MPPT voltage range (VDC) | Maximum input direct-current electric current (A) |
| 825 | 450～820 | 1600 |
Table 2 photovoltaic DC-to-AC converter output parameter
| Rated output power (kW) | Peak power output (kW) | Rated operational voltage (V) | Specified output frequency (Hz) |
| 750 | 810 | 315 | 50 |
The performance parameter of table 3 photovoltaic module
| Rated power (kW) | Open circuit voltage (V) | Operating voltage (V) |
| 310 | 45.45 | 37.00 |
If adopt traditional photovoltaic DC-to-AC converter serial connection photovoltaic module, so photovoltaic module be often connected in series into block number N
maxfollowing formula should be met:
45.45N
max≤820(1)
The solution of formula (1) is;
N
max＝18(2)
If adopt photovoltaic DC-to-AC converter of the present utility model be connected in series photovoltaic module, be reduced to operating voltage 37.00V by open circuit voltage 45.45V, so photovoltaic module be often connected in series into block number N
maxformula (3) should be met
37.00N
max≤820(3)
The solution of formula (3) is:
N
max＝22(4)
So the rated power of photovoltaic DC-to-AC converter can rise to
As can be seen from formula (5), photovoltaic inverter grid-connected capacity of the present utility model obviously improves.Compared to traditional photovoltaic DC-to-AC converter, grid connection capacity improves 22.2 ℅.
Therefore, by step-down combining of the present utility model pre-assembled point of station, the grid connection capacity of photovoltaic DC-to-AC converter can be improved.In addition, the utility model can also solve the too high problem causing photovoltaic DC-to-AC converter certainly not open of photovoltaic module open circuit voltage under extreme cold condition.
Step-down combining of the present utility model pre-assembled point of station adopts floor plan, and offers window in the outside of step-down combining pre-assembled point of station, and commissioning staff can carry out debugging efforts in outside, and fail safe is protected.Secondly, reduce grid-connected open circuit voltage by dropping equipment, the capacity of photovoltaic DC-to-AC converter can be improved; Solve the too high equipment that causes of photovoltaic module open circuit voltage under extreme cold condition simultaneously and certainly can not open problem; Again, by adding dropping equipment, effectively prevent the problem of operating voltage lower than MPPT minimum voltage of existence when grid-connected header box amount is lacked.
Below described preferred embodiment of the present utility model in detail, but it will be appreciated that, after having read above-mentioned instruction content of the present utility model, those skilled in the art can make various changes or modifications the utility model.These equivalent form of values fall within the application's appended claims limited range equally.
Claims (10)
1. a step-down combining pre-assembled point of station, it is characterized in that: described step-down combining pre-assembled point of station comprises photovoltaic DC-to-AC converter, transformer, inverter room and transformer room, it is indoor that described photovoltaic DC-to-AC converter is arranged at described inverter, described transformer is arranged in described transformer room, and is connected by copper bar between described inverter room and described transformer room; Described photovoltaic DC-to-AC converter comprises DC circuit breaker, electric capacity of voltage regulation, three phase inverter bridge, filter, AC circuit breaker and dropping equipment; Wherein said DC circuit breaker comprises the 3rd switch (S
1), the 3rd switch (S
1) be arranged at privates (L
0) on, described dropping equipment comprises pre-charge resistance (R
1) and nonlinear resistance (R
2), described pre-charge resistance (R
1) one end be electrically connected with the positive pole of described electric capacity of voltage regulation, described pre-charge resistance (R
1) the other end by the first wire (L
1) and described privates (L
0) electrical connection, described nonlinear resistance (R
2) one end by the second wire (L
2) and described privates (L
0) electrical connection, described nonlinear resistance (R
2) other end ground connection, and at described first wire (L
1) be provided with the first switch (QB
1) and at described second wire (L
2) be provided with second switch (QB
2).
2. step-down combining according to claim 1 pre-assembled point of station, it is characterized in that, described dropping equipment also comprises CPU module, the first relay and the second relay, wherein, described first relay is electrically connected with described first switch, described second relay is electrically connected with described second switch, and described CPU module is electrically connected with described first relay and described second relay respectively.
3. step-down combining according to claim 1 pre-assembled point of station, is characterized in that, described nonlinear resistance is adjustable resistance.
4. step-down combining according to claim 2 pre-assembled point of station, it is characterized in that, described dropping equipment also comprises power supply, and described power supply is electrically connected with described first relay, described second relay and described CPU module thus provides electric energy for described first relay, described second relay and described CPU module.
5. step-down combining according to claim 1 pre-assembled point of station, is characterized in that, described pre-charge resistance is linear resistance.
6. step-down combining according to claim 1 pre-assembled point of station, it is characterized in that, described inverter room comprises direct current and converges line cabinet, inverter bridge room, filter chamber and exchange and export room, and wherein said DC circuit breaker and described dropping equipment are arranged at that described direct current converges in line cabinet, described electric capacity of voltage regulation and three phase inverter bridge are arranged at that described inverter bridge is indoor, described filter is arranged in described filter chamber and described AC circuit breaker is arranged at described interchange and exports indoor.
7. step-down combining according to claim 6 pre-assembled point of station, it is characterized in that, described direct current remittance line cabinet, inverter bridge room, filter chamber and interchange export room and are respectively equipped with window, can be debugged by described window to described DC circuit breaker, dropping equipment, electric capacity of voltage regulation, three phase inverter bridge and filter.
8. step-down combining according to claim 6 pre-assembled point of station, is characterized in that, described direct current remittance line cabinet, inverter bridge room, filter chamber and interchange export indoor and be respectively equipped with heat abstractor.
9. step-down combining according to claim 1 pre-assembled point of station, is characterized in that, described step-down combining pre-assembled point of station comprises two photovoltaic DC-to-AC converters and two cover inverter rooms, and inverter indoor described in every suit arrange a described photovoltaic DC-to-AC converter.
10. step-down combining according to claim 1 pre-assembled point of station, it is characterized in that, described step-down combining pre-assembled point of station also comprises lightning arrester, lightning-arrest counter, the relay detecting power transformer interior fault and hyperbaric chamber, and the relay of described lightning arrester, lightning-arrest counter and detection power transformer interior fault is arranged in described hyperbaric chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520461851.6U CN204992375U (en) | 2015-06-30 | 2015-06-30 | Step -down is incorporated into power networks and is assembled substation room in advance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520461851.6U CN204992375U (en) | 2015-06-30 | 2015-06-30 | Step -down is incorporated into power networks and is assembled substation room in advance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204992375U true CN204992375U (en) | 2016-01-20 |
Family
ID=55126704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520461851.6U Active CN204992375U (en) | 2015-06-30 | 2015-06-30 | Step -down is incorporated into power networks and is assembled substation room in advance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204992375U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901212A (en) * | 2015-06-30 | 2015-09-09 | 中国电力工程顾问集团华东电力设计院有限公司 | Voltage-reduction synchronization pre-assembly substation room |
-
2015
- 2015-06-30 CN CN201520461851.6U patent/CN204992375U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104901212A (en) * | 2015-06-30 | 2015-09-09 | 中国电力工程顾问集团华东电力设计院有限公司 | Voltage-reduction synchronization pre-assembly substation room |
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