CN113113906A - Groove type solar mirror field LOC local control box power supply system and power supply method - Google Patents

Groove type solar mirror field LOC local control box power supply system and power supply method Download PDF

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Publication number
CN113113906A
CN113113906A CN202110454785.XA CN202110454785A CN113113906A CN 113113906 A CN113113906 A CN 113113906A CN 202110454785 A CN202110454785 A CN 202110454785A CN 113113906 A CN113113906 A CN 113113906A
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mirror field
power supply
direct current
current
local control
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吕贝
郭辰
张立英
贾蓉
邵振洲
李芊
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Huaneng Clean Energy Research Institute
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Huaneng Clean Energy Research Institute
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J1/00—Circuit arrangements for dc mains or dc distribution networks
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The invention discloses a power supply system and a power supply method for a LOC local control cabinet of a slot type solar mirror field, wherein the power supply system comprises a plurality of power supply subareas, and the power supply subareas are respectively connected with a high-voltage alternating-current cable; the power supply partition includes: the system comprises a mirror field box type transformer, a mirror field direct current system, a mirror field direct current primary distribution electric disk and a mirror field direct current secondary distribution electric disk; the high-voltage side of the box-type mirror field transformer is connected with a high-voltage alternating-current cable, the low-voltage side of the box-type mirror field transformer is connected with the input end of a mirror field direct-current system, the output end of the mirror field direct-current system is connected with the input ends of a plurality of mirror field direct-current primary distribution electric disks, the output end of the mirror field direct-current primary distribution electric disk is connected with the input ends of a plurality of mirror field direct-current secondary distribution electric disks, and the output end of the mirror field direct-current secondary distribution electric disk is connected with the power supply input ends of a plurality of. A direct current system is adopted to supply power for the LOC local control box, so that the problem that the rated capacity of power supply equipment is selected too much due to starting current of a motor is avoided.

Description

Groove type solar mirror field LOC local control box power supply system and power supply method
Technical Field
The invention belongs to the field of trough type solar thermal power generation, and particularly relates to a power supply system and a power supply method for a LOC local control cabinet of a trough type solar mirror field.
Background
The trough type solar thermal power generation utilizes a trough type parabolic reflector to focus sunlight to a heat collecting pipe, heats a heat transfer medium in a pipe, then transfers heat energy to water through a heat exchanger, and further generates high-temperature and high-pressure steam to drive a turbine set to generate power.
In order to collect enough solar heat energy, a mirror field with a large area needs to be configured for arranging the groove type reflector heat collecting assembly. Each reflector heat collection assembly unit is provided with a set of driving device and an LOC controller for realizing the rotation focusing of the reflector tracking the sun. A reflector heat collection assembly manufacturer sets an LOC local control box on each assembly in a set for supplying power and controlling a driving device motor of the assembly and an LOC controller, wherein the LOC controller is installed in the box.
The trough type solar thermal power generation project mirror field is large, the number of LOC local control boxes in the mirror field is large, the distribution is extremely dispersed, and for example, the number of LOC local control boxes in a trough type thermal power generation mirror field with the capacity of 50MW reaches more than 800. The design of a power supply scheme of a LOC local control cabinet of a mirror field is an important ring in the design of a slot type thermal power generation mirror field and needs intensive research.
The conventional LOC in-place control box power scheme is as follows: the power supply load of the LOC local control box, namely a driving device motor and the LOC controller, adopts alternating current equipment. When the LOC controller runs in windy and severe weather, the motor is required to be controlled by the LOC controller to drive the reflector to rotate and return to a safe position, the power supply is required to be uninterrupted in the period, and the LOC local control box adopts a three-phase alternating current Uninterrupted Power Supply (UPS) for power supply. And dividing the mirror field into a plurality of areas according to the quantity and the distribution condition of the LOC local control boxes. A box-type transformer and a set of UPS are arranged in the center of each area and used for supplying power to all LOC local control boxes in the area, and a plurality of primary distribution boxes and secondary distribution boxes are arranged at proper positions in the area to form a layered radial power supply network of each area.
The conventional scheme has disadvantages in that: the direct starting current of the alternating current motor of the driving device is large and reaches 6-7 times of rated current, and the starting time is about 3 seconds; however, the overload capacity of the UPS power supply device is limited, and the 3s overload capacity is generally not more than 1.5 times, so that at least 4 times of the rated power of the motor needs to be considered when the UPS rated power is selected. Under normal operating conditions, most of the capacity of the UPS device is idle. The limited overload capacity of the UPS device is not suitable for power supply of motor loads, so that the rated capacity is multiplied during model selection, the equipment investment is large, and the scheme economy is not high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a power supply system and a power supply method for a LOC local control box of a trough type solar mirror field, which can obviously improve the economical efficiency of a power supply scheme for the LOC local control box of the trough type solar mirror field.
In order to achieve the purpose, the invention adopts the following technical scheme:
a power supply system of a LOC local control cabinet of a slot type solar mirror field comprises a plurality of power supply subareas, wherein the power supply subareas are respectively connected with a high-voltage alternating-current cable; the power supply section includes: the system comprises a mirror field box type transformer, a mirror field direct current system, a mirror field direct current primary distribution electric disk and a mirror field direct current secondary distribution electric disk;
the high-voltage side of the box-type mirror field transformer is connected with the high-voltage alternating-current cable, the low-voltage side of the box-type mirror field transformer is connected with the input end of the mirror field direct-current system, the output end of the mirror field direct-current system is connected with the input ends of the mirror field direct-current primary distribution electric disks, the output end of the mirror field direct-current primary distribution electric disk is connected with the input ends of the mirror field direct-current secondary distribution electric disks, and the output end of the mirror field direct-current secondary distribution electric disk is connected with the power input ends of the LOC local control boxes.
Specifically, the mirror field box type transformer comprises a transformer body, a high-voltage side load switch combined electrical apparatus and a low-voltage incoming line breaker;
the high-voltage alternating current cable is connected to the high-voltage input end of the transformer body through the high-voltage side load switch combined electrical apparatus, the low-voltage output end of the transformer body is connected to a low-voltage alternating current bus through a low-voltage incoming line breaker, and the low-voltage alternating current bus is connected with the alternating current power supply input end of the mirror field direct current system through a low-voltage feeder line breaker.
Specifically, the mirror field direct current system comprises a charging device, a storage battery pack and a direct current breaker; an input power supply of the field mirror direct current system is led from a low-voltage feeder of the field mirror box type transformer, and the output end of the charging device, the output end of the storage battery pack and the input end of the direct current feeder are all connected to the same direct current bus; and the output end of the direct current feeder is connected with the power supply input end of the mirror field primary direct current distribution panel.
Specifically, the mirror field primary direct current distribution electric disk is provided with 1 path of power supply incoming line and 5 paths of power supply feeder lines, the power supply incoming line of the mirror field primary direct current distribution electric disk is led from the direct current feeder line of the mirror field direct current system, and the power supply feeder line of the mirror field primary direct current distribution electric disk is connected with the power supply incoming line of the mirror field secondary direct current distribution electric disk.
Specifically, the mirror field secondary direct current distribution electric disk is provided with 1 path of power supply incoming line and 4 paths of power supply feeder lines, the power supply incoming line of the mirror field secondary direct current distribution electric disk is led from the mirror field primary direct current distribution electric disk power supply feeder line in the area, and the power supply feeder line of the mirror field secondary direct current distribution electric disk is connected with the LOC local control box power supply incoming line end.
Specifically, the load connected with the LOC local control box is a driving device motor and an LOC controller, and the driving device motor and the LOC controller are direct-current power supply type equipment.
Specifically, the low-voltage side of the mirror field box type transformer is a 380V alternating current output end, and the output end of the mirror field direct current system is a 220V direct current output end.
Specifically, the number of the power supply partitions is 8.
Specifically, the number of the mirror field primary direct current distribution electric disks in each power supply partition is 5.
The invention provides another technical scheme that:
a power supply method of a groove type solar mirror field LOC local control box power supply system comprises the following steps:
constructing a layered direct current radiation power supply system according to the quantity and the distribution condition of LOC local control boxes; selecting direct current power supply type equipment for the load of the LOC local control box; the layered direct-current radiation power supply system comprises a plurality of power supply subareas, wherein the power supply subareas are respectively connected with a high-voltage alternating-current cable; the power supply section includes: the system comprises a mirror field box type transformer, a mirror field direct current system, a mirror field direct current primary distribution electric disk and a mirror field direct current secondary distribution electric disk; the high-voltage side of the box-type transformer of the mirror field is connected with the high-voltage alternating-current cable, and the low-voltage side of the box-type transformer of the mirror field is connected with the input end of the direct-current system of the mirror field; the output end of the mirror field direct current system is connected with the input ends of the plurality of mirror field direct current primary distribution electric disks, and the output end of the mirror field direct current primary distribution electric disk is connected with the input ends of the plurality of mirror field direct current secondary distribution electric disks; the output end of the mirror field direct current secondary distribution electric disk is connected with the power supply input ends of a plurality of LOC local control boxes to form a 220V direct current layered radial power supply network; the mirror field direct-current system comprises a charging device, a storage battery pack and a direct-current breaker; an input power supply of the field mirror direct current system is led from a low-voltage feeder of the field mirror box type transformer, and the output end of the charging device, the output end of the storage battery pack and the input end of the direct current feeder are all connected to the same direct current bus; the output end of the direct current feeder line is led to the power supply input end of the mirror field primary direct current distribution electric disk;
when the system normally works, the mirror field direct current system rectifies the 380V alternating-current service power supply on the low-voltage side of the mirror field box type transformer to flow out of a 220V direct current power supply, and the rectified power supply sequentially passes through a mirror field direct current primary distribution electric disk and a mirror field direct current secondary distribution electric disk and is conveyed to a power supply input end of an LOC local control box;
under the working conditions of starting and power failure, the storage battery pack discharges to provide 220V direct-current power supply, and then the LOC local control box is supplied with power uninterruptedly through the primary direct-current distribution electric disc of the mirror field and the secondary direct-current distribution electric disc of the mirror field.
The invention has the following beneficial effects:
1. according to the power supply system of the LOC local control box in the groove type solar mirror field, the DC220V direct current system is adopted to supply power to the LOC local control box, the situation that the rated capacity of power supply equipment is selected too much due to starting current of a motor is effectively avoided, the engineering cost of the power supply equipment is effectively reduced, and the project investment is saved.
2. According to the power supply system for the LOC local control boxes in the groove type solar mirror field, provided by the embodiment of the invention, through arrangement of structures such as the mirror field direct current primary distribution electric disk and the mirror field direct current secondary distribution electric disk, power can be supplied to at least 800 LOC local control boxes, and the economy is further improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a power supply system of a LOC local control box in a trough-type solar mirror field according to an embodiment of the present invention.
Fig. 2 is a schematic circuit structure diagram of a field dc system in a power supply system of a LOC local control box of a trough-type solar field according to an embodiment of the present invention.
Fig. 3 is a schematic circuit structure diagram of a mirror field box transformer in the power supply system of the LOC local control box of the trough-type solar mirror field according to the embodiment of the present invention.
Fig. 4 is a schematic circuit structure diagram of a mirror field primary dc distribution panel in a power supply system of a LOC local control box of a trough-type solar mirror field according to an embodiment of the present invention.
Fig. 5 is a schematic circuit structure diagram of a mirror field secondary direct current distribution panel in a power supply system of a LOC local control box of a trough-type solar mirror field according to an embodiment of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
The embodiment of the invention provides a power supply system and a power supply method for a LOC local control box of a slot type solar mirror field, wherein a DC220V direct current system is adopted to supply power for the LOC local control box, so that the condition that the rated capacity of power supply equipment is selected too much due to the starting current of a motor is effectively avoided, the engineering cost of the power supply equipment is effectively reduced, and the project investment is saved.
As shown in fig. 1, the project parameters of the embodiment corresponding to fig. 1 are: a mirror field of 50MW slot type solar power generation, evenly distributed has 800 LOC local control casees in the mirror field, and every LOC local control case corresponds 1 driving motor that rated power is 0.55kW and 1 LOC controller that rated power is 0.12 kW.
As shown in fig. 1, a schematic structural diagram of an embodiment of the present invention is shown. The system comprises a plurality of power supply subareas, wherein the power supply subareas are respectively connected with a high-voltage alternating-current cable; the power supply partition is composed of a mirror field box type transformer, a mirror field direct current system, a mirror field direct current primary distribution electric disk, a mirror field direct current secondary distribution electric disk and a connecting cable.
According to the distribution condition of LOC in the mirror field, the mirror field is divided into 8 power supply subareas, and 100 LOC local control boxes are arranged in each power supply subarea, corresponding to 100 driving motors and 100 LOC controllers. Each power supply partition is provided with 1 mirror field box type transformer and 1 set of mirror field direct current system, and the total field is 8 mirror field box type transformers and 8 sets of mirror field direct current systems. The high-voltage input power supply of the box-type transformer in the mirror field is 6KV, and is led from a high-voltage station power system in a conventional island or the high-voltage side of the box-type transformer in the adjacent mirror field, a low-voltage 380V alternating current output feeder of the box-type transformer in the mirror field is led to the alternating current power supply input end of a direct current system in the mirror field, and a 220V direct current output feeder of the direct current system in the mirror field is led to the primary direct current distribution switchboard power supply input end of the mirror. The box-type transformer converts high-voltage auxiliary power from a conventional power generation island into low-voltage auxiliary power on the scene, and is used for supplying power to a direct-current system of the scene under normal working conditions. The mirror field direct current system rectifies low-voltage 380V alternating-current station service power into a 220V direct-current power supply under the normal working condition, provides the 220V direct-current power supply by utilizing a self-matched storage battery pack under the starting working condition and the accident power failure working condition, and then uninterruptedly supplies power to the LOC local control box through a primary direct-current distribution panel and a secondary direct-current distribution panel.
According to the distribution condition of LOC local control boxes in power supply subareas, 5 mirror field direct current primary distribution electric disks and 25 mirror field direct current secondary distribution electric disks are respectively arranged in each power supply subarea to form a 220V direct current layered radial power supply network. The 5 mirror field primary direct current distribution electric disks are all provided with 1 path of power supply inlet wire and 5 paths of power supply feeder wires, the power supply inlet wires of all the mirror field primary direct current distribution electric disks are led from the 220V direct current feeder wires of the direct current system in the area, and the power supply feeder wires of all the mirror field primary direct current distribution electric disks are led to the power supply inlet wires of the nearby mirror field secondary direct current distribution electric disks. The 25 mirror field secondary direct current distribution electric disks are all provided with 1 path of power supply incoming line and 4 paths of power supply feeder lines, the power supply incoming lines of all the mirror field secondary direct current distribution electric disks are all led from the power supply feeder lines of the mirror field primary direct current distribution electric disks nearby, and the power supply feeder lines of all the mirror field secondary direct current distribution electric disks are all led to local control units (LOC) nearby.
As shown in fig. 2, a circuit structure of the mirror field dc system in an embodiment of the invention is schematically illustrated. The mirror field direct current system mainly comprises a charging device, a storage battery pack, a direct current breaker and the like. An alternating current 380V input power supply of the mirror field direct current system is led from a low-voltage feeder of the box-type transformer, and the output end of the charging device, the output end of the storage battery pack and the input end of the direct current feeder are all connected to the same direct current bus. And a 220V direct current output feeder is led to the power input end of the mirror field primary direct current distribution panel.
Under a normal working condition, rectifying the low-voltage 380V alternating-current station service power from a 220V direct-current power supply by using a charging device; under the working conditions of starting and power failure in accident, the storage battery pack discharges to provide 220V direct-current power supply, and then the LOC local control box is supplied with power uninterruptedly through the primary and secondary direct-current distribution panels. The capacity of a set of storage battery set matched with the mirror field direct current system is selected according to the energy requirement of driving a motor to drive a reflector to return to a safety position under the power failure working condition.
The DC load carried by the DC system of each area mirror field is specifically as follows:
-an LOC drive motor: rated power of 100x0.55kW is 55kW
-the LOC controller: rated power of 100x0.12kW is 12kW
The duration is considered to be the time it takes for the mirror to return to the safety position from the position furthest away from the safety position for 30 minutes. The dc load statistics table is shown in table 1.
TABLE 1 DC LOAD STATISTIC TABLE
Figure BDA0003040096930000071
The storage battery pack is a maintenance-free valve-controlled lead-acid storage battery pack, the nominal voltage of a single battery is 2V, the corresponding floating charge voltage is 2.23V, the equalizing charge voltage is 2.33V, and the termination voltage is 1.85V. According to technical regulations for designing power engineering direct-current power supply systems in DL/T5044-2014, 104 storage battery packs are counted.
The first stage storage battery pack calculates capacity:
Cc1＝Kk*I1/Kc1＝1.4*432.73/1.24＝488.56Ah；
the second stage storage battery pack calculates capacity:
Cc2＝Kk*[I1/Kc1+(I2-I1)/Kc2]＝1.4*[432.73/0.78+(232.73-432.73)/0.8]＝426.69Ah；
the calculated capacity of the storage battery pack is 488.56Ah, and the rated capacity is 500 Ah.
The rated voltage of the charging device is selected according to the voltage and the number of the single storage battery pack, and the rated current is selected according to the capacity of the storage battery pack and the constant load current.
Rated current of the charging device: i isr＝(1.0～1.25)*I10+Ijc290A is taken as (1.0-1.25) × 50+232.73 ═ 282.73-295.23A. SelectingA 12 rated current 30A charging module (containing 2 additional modules) was used.
Rated voltage of charging device: u shaper＝n*Ucm＝104*2.4＝249.6V
Fig. 3 is a schematic circuit diagram of a box-type transformer according to an embodiment of the present invention. The box-type transformer mainly comprises a transformer body and a high-low voltage side switch. And a 6kV high-voltage side input power supply of the box type transformer is led to the high-voltage side of the high-voltage station power system of the self-generating conventional island or the adjacent box type transformer. A6 kV high-voltage side input power supply of the box-type transformer is connected to a high-voltage input end of a transformer body through a high-voltage side load switch combined electrical appliance (composed of an isolating switch, a load switch and a grounding switch), and the transformer body converts the 6kV high-voltage alternating current power supply into a 380V low-voltage alternating current power supply and outputs the 380V low-voltage alternating current power supply to a low-voltage alternating current bus through a low-voltage incoming line breaker. The input end of the low-voltage feeder circuit breaker is connected to a low-voltage alternating current bus, and the output end of the low-voltage feeder circuit breaker is led to the input end of an alternating current power supply of the mirror field direct current system in the local area.
The box-type transformer converts high-voltage auxiliary power from a conventional power generation island into low-voltage auxiliary power on the spot of a mirror field, and the low-voltage auxiliary power is used for supplying power to a direct-current system under normal working conditions. The rated capacity of the transformer is selected according to the rated capacity of the charging device in the direct current system.
Rated power of the dc system charging device: sr is Ur*Ir290 × 249.6 × 72.4kVA, taking into account a certain margin: 1.1 Sr 1.1 72.4 79.64kVA, the transformer capacity is selected to be 80kVA, the type is selected: SCB10-80kVA, transformation ratio of 6.3 +/-2 x 2.5%/0.4 kV.
Fig. 4 is a schematic circuit diagram of a primary dc distribution board according to an embodiment of the present invention. The mirror field primary direct current distribution electric disk is provided with 1 path of power supply inlet wire and 5 paths of power supply feeder wires, the power supply inlet wire is led from a 220V direct current feeder wire of a direct current system in the area, and the power supply feeder wire is led to a nearby mirror field secondary direct current distribution electric disk power supply inlet wire.
Fig. 5 is a schematic circuit diagram of a two-stage dc distribution board according to an embodiment of the present invention. The mirror field secondary direct current distribution electric disk is provided with 1 path of power supply incoming line and 4 paths of power supply feeder lines, the power supply incoming line is led from the mirror field primary direct current distribution electric disk power supply feeder line in the region, and the power supply feeder line is led to the power supply incoming line of a nearby LOC local control box.
The embodiment of the invention also provides a power supply method of the power supply system of the LOC local control box in the groove type solar mirror field, which comprises the following steps:
the load (a driving device motor and an LOC controller) of the LOC local control box selects a direct current power supply type device;
constructing a layered direct current radiation power supply system according to the quantity and the distribution condition of LOC local control boxes; the layered direct-current radiation power supply system comprises 8 power supply subareas, wherein the 8 power supply subareas are respectively connected with a high-voltage alternating-current cable; the power supply partition includes: the system comprises a mirror field box type transformer, a set of mirror field direct current system, a mirror field direct current primary distribution electric disk and a mirror field direct current secondary distribution electric disk;
the high-voltage side of the mirror field box type transformer is connected with a high-voltage alternating-current cable, and the low-voltage side of the mirror field box type transformer is connected with the input end of a mirror field direct-current system; the output end of the mirror field direct current system is connected with the input ends of a plurality of mirror field direct current primary distribution electric disks, and the output end of the mirror field direct current primary distribution electric disk is connected with the input ends of a plurality of mirror field direct current secondary distribution electric disks; the output end of the mirror field direct current secondary distribution electric disk is connected with the power supply input ends of a plurality of LOC local control boxes to form a 220V direct current layered radial power supply network;
the mirror field direct current system comprises a charging device, a storage battery pack and a direct current breaker; an input power supply of the mirror field direct current system is led from a low-voltage feeder of a mirror field box type transformer, and the output end of the charging device, the output end of the storage battery pack and the input end of the direct current feeder are all connected to the same direct current bus; the output end of the direct current feeder line is led to the power supply input end of the mirror field primary direct current distribution electric disk;
when the system normally works, a mirror field direct current system rectifies 380V alternating-current service power supply on the low-voltage side of a mirror field box type transformer to output 220V direct current power supply, and the rectified power supply sequentially passes through a mirror field direct current primary distribution power disc and a mirror field direct current secondary distribution power disc and is transmitted to a power supply input end of an LOC local control box;
under the working conditions of starting and power failure, the storage battery pack discharges to provide 220V direct-current power supply, and then the LOC local control box is supplied with power uninterruptedly through the primary direct-current distribution electric disc of the mirror field and the secondary direct-current distribution electric disc of the mirror field.
The power supply system and the power supply method for the LOC local control box of the groove type solar mirror field provided by the embodiment of the invention can effectively avoid the situation that the rated capacity of power supply equipment is selected too much due to the starting current of a motor, thereby effectively reducing the engineering cost of the power supply equipment and saving the project investment.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims (10)

1. A power supply system of a LOC local control cabinet of a slot type solar mirror field is characterized by comprising a plurality of power supply subareas, wherein the power supply subareas are respectively connected with a high-voltage alternating-current cable; the power supply section includes: the system comprises a mirror field box type transformer, a mirror field direct current system, a mirror field direct current primary distribution electric disk and a mirror field direct current secondary distribution electric disk;
the high-voltage side of the box-type mirror field transformer is connected with the high-voltage alternating-current cable, the low-voltage side of the box-type mirror field transformer is connected with the input end of the mirror field direct-current system, the output end of the mirror field direct-current system is connected with the input ends of the mirror field direct-current primary distribution electric disks, the output end of the mirror field direct-current primary distribution electric disk is connected with the input ends of the mirror field direct-current secondary distribution electric disks, and the output end of the mirror field direct-current secondary distribution electric disk is connected with the power input ends of the LOC local control boxes.
2. The LOC local control box power supply system of a trough solar mirror field of claim 1, wherein the mirror field box transformer comprises a transformer body, a high side load switch combination and a low voltage incoming line breaker;
the high-voltage alternating current cable is connected to the high-voltage input end of the transformer body through the high-voltage side load switch combined electrical apparatus, the low-voltage output end of the transformer body is connected to a low-voltage alternating current bus through a low-voltage incoming line breaker, and the low-voltage alternating current bus is connected with the alternating current power supply input end of the mirror field direct current system through a low-voltage feeder line breaker.
3. The LOC local control box power supply system of a trough solar mirror field of claim 1, wherein said mirror field DC system comprises a charging device, a battery pack and a DC breaker; an input power supply of the field mirror direct current system is led from a low-voltage feeder of the field mirror box type transformer, and the output end of the charging device, the output end of the storage battery pack and the input end of the direct current feeder are all connected to the same direct current bus; and the output end of the direct current feeder is connected with the power supply input end of the mirror field primary direct current distribution panel.
4. The LOC local control box power supply system of a trough-type solar mirror field according to claim 1, wherein said mirror field primary DC distribution panel is provided with 1 power inlet and 5 power feeders, the power inlet of the mirror field primary DC distribution panel is led from the DC feeder of the mirror field DC system, and the power feeder of the mirror field primary DC distribution panel is connected with the power inlet of the mirror field secondary DC distribution panel.
5. The LOC local control box power supply system of a trough-type solar mirror field according to claim 4, wherein the mirror field secondary DC distribution electric disk is provided with 1-way power supply incoming line and 4-way power supply feeder line, the power supply incoming line of the mirror field secondary DC distribution electric disk is led from the mirror field primary DC distribution electric disk power supply feeder line of the zone, and the power supply feeder line of the mirror field secondary DC distribution electric disk is connected with the LOC local control box power supply incoming line end.
6. The LOC local control box power supply system of a trough-type solar mirror field of claim 1, wherein loads connected with the LOC local control box are a driving device motor and a LOC controller, and the driving device motor and the LOC controller are direct current power supply type devices.
7. The LOC local control box power supply system of a trough solar mirror field of claim 1, wherein the low voltage side of the mirror field box transformer is 380V AC output and the output of the mirror field DC system is 220V DC output.
8. The LOC local control box power supply system of a trough solar mirror field of claim 1, wherein the number of power supply sections is 8.
9. The LOC local control box power supply system of a trough-type solar mirror field according to claim 1, wherein the number of primary DC distribution panels of the mirror field in each power supply partition is 5.
10. The power supply method of the LOC local control box power supply system of the trough type solar mirror field of claim 1, which is characterized by comprising the following steps:
constructing a layered direct current radiation power supply system according to the quantity and the distribution condition of LOC local control boxes; selecting direct current power supply type equipment for the load of the LOC local control box; the layered direct-current radiation power supply system comprises a plurality of power supply subareas, wherein the power supply subareas are respectively connected with a high-voltage alternating-current cable; the power supply section includes: the system comprises a mirror field box type transformer, a mirror field direct current system, a mirror field direct current primary distribution electric disk and a mirror field direct current secondary distribution electric disk; the high-voltage side of the box-type transformer of the mirror field is connected with the high-voltage alternating-current cable, and the low-voltage side of the box-type transformer of the mirror field is connected with the input end of the direct-current system of the mirror field; the output end of the mirror field direct current system is connected with the input ends of the plurality of mirror field direct current primary distribution electric disks, and the output end of the mirror field direct current primary distribution electric disk is connected with the input ends of the plurality of mirror field direct current secondary distribution electric disks; the output end of the mirror field direct current secondary distribution electric disk is connected with the power supply input ends of a plurality of LOC local control boxes to form a 220V direct current layered radial power supply network; the mirror field direct-current system comprises a charging device, a storage battery pack and a direct-current breaker; an input power supply of the field mirror direct current system is led from a low-voltage feeder of the field mirror box type transformer, and the output end of the charging device, the output end of the storage battery pack and the input end of the direct current feeder are all connected to the same direct current bus; the output end of the direct current feeder line is led to the power supply input end of the mirror field primary direct current distribution electric disk;
when the system normally works, the mirror field direct current system rectifies the 380V alternating-current service power supply on the low-voltage side of the mirror field box type transformer to flow out of a 220V direct current power supply, and the rectified power supply sequentially passes through a mirror field direct current primary distribution electric disk and a mirror field direct current secondary distribution electric disk and is conveyed to a power supply input end of an LOC local control box;
under the working conditions of starting and power failure, the storage battery pack discharges to provide 220V direct-current power supply, and then the LOC local control box is supplied with power uninterruptedly through the primary direct-current distribution electric disc of the mirror field and the secondary direct-current distribution electric disc of the mirror field.
CN202110454785.XA 2021-04-26 2021-04-26 Groove type solar mirror field LOC local control box power supply system and power supply method Pending CN113113906A (en)

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CN202110454785.XA CN113113906A (en) 2021-04-26 2021-04-26 Groove type solar mirror field LOC local control box power supply system and power supply method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110454785.XA CN113113906A (en) 2021-04-26 2021-04-26 Groove type solar mirror field LOC local control box power supply system and power supply method

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CN113113906A true CN113113906A (en) 2021-07-13

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CN202110454785.XA Pending CN113113906A (en) 2021-04-26 2021-04-26 Groove type solar mirror field LOC local control box power supply system and power supply method

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