CN107968329A - Grid-connected access case and its access system - Google Patents

Grid-connected access case and its access system Download PDF

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Publication number
CN107968329A
CN107968329A CN201711097926.7A CN201711097926A CN107968329A CN 107968329 A CN107968329 A CN 107968329A CN 201711097926 A CN201711097926 A CN 201711097926A CN 107968329 A CN107968329 A CN 107968329A
Authority
CN
China
Prior art keywords
grid
access case
energy meter
electric energy
breaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711097926.7A
Other languages
Chinese (zh)
Inventor
李光明
李刚
赵伟伟
陈先锋
张振鲁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taoyuan Linyi Industrial Co Ltd
State Grid Corp of China SGCC
Linyi Power Supply Co of State Grid Shandong Electric Power Co Ltd
Original Assignee
Taoyuan Linyi Industrial Co Ltd
State Grid Corp of China SGCC
Linyi Power Supply Co of State Grid Shandong Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Taoyuan Linyi Industrial Co Ltd, State Grid Corp of China SGCC, Linyi Power Supply Co of State Grid Shandong Electric Power Co Ltd filed Critical Taoyuan Linyi Industrial Co Ltd
Priority to CN201711097926.7A priority Critical patent/CN107968329A/en
Publication of CN107968329A publication Critical patent/CN107968329A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02BBOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/26Casings; Parts thereof or accessories therefor
    • H02B1/46Boxes; Parts thereof or accessories therefor
    • H02J3/383
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)

Abstract

The invention discloses a kind of grid-connected access case and its access system, it belongs to technical field of photovoltaic power generation.It solve in the prior art tradition access case existing for measuring difficulties, power grid incoming call cannot automatic power transmission the defects of.Including ammeter box and grid connection box; isolation board is equipped between ammeter box and grid connection box; ammeter box is located at the top of grid connection box; isolation board is equipped with threading hole; electric energy meter is equipped with ammeter box; line bank is mounted with above grid connection box, the first breaker, Surge Protector, protector with automatic reconnection for leakage of electricity, inverter switching device and fuse type disconnector are equipped with grid connection box;One end of first breaker is connected with Surge Protector, and the other end is connected by line bank with electric energy meter;Protector with automatic reconnection for leakage of electricity is connected with electric energy meter and fuse type disconnector respectively by line bank;One end of inverter switching device is connected by line bank with electric energy meter, and the other end is connected with inverter.Present invention is mainly used on photovoltaic generating system.

Description

Grid-connected access case and its access system
Technical field:
The invention belongs to technical field of photovoltaic power generation, specifically, more particularly to a kind of grid-connected access case and its connect Enter system.
Background technology:
Photovoltaic generation is as one of emerging clean efficient energy, as country is to emerging energy industry and resident's self power generation Vigorously support, parallel network power generation becomes a kind of effective way of application of promoting the use of clean energy, and can gradually substitute one Part old power generator and technology.But during resident's parallel network power generation is promoted, due to used photovoltaic Power generator does not have dedicated control and metering device, and interim metering solution party can only be used during network combination construction is carried out Case, be easy to cause heavy and repeated labor;And it is initially grid-connected without the personnel of clear and definite standard and specialty installation, therefore make How thoroughly to isolate with photovoltaic generation into many technological deficiency and security risk, such as grid power blackout maintenance, work as grid power blackout When automatically power off, when power grid incoming call after how automatic power transmission with reach photovoltaic generation can come into operation at the first time power generation etc. Problem.
The content of the invention:
In order to solve in the prior art, measuring difficulties, power grid incoming call power transmission cannot ask automatically existing for tradition access case Topic, the present invention provides a kind of grid-connected access case and its access system for being different from the prior art, its accurate measurement, system Easy to maintain.
To achieve these goals, the present invention is realized using following technical scheme:
A kind of grid-connected access case, including ammeter box and grid connection box, are equipped with isolation board between ammeter box and grid connection box, electricity Electricity box are located at the top of grid connection box, and the isolation board is equipped with threading hole, electric energy meter, the grid connection box are equipped with the ammeter box Top is mounted with line bank, and the first breaker, Surge Protector, automatic reclosing earth leakage protective are equipped with the grid connection box Device, inverter switching device and fuse type disconnector;One end of first breaker is connected with Surge Protector, and the other end passes through Line bank is connected with electric energy meter;The protector with automatic reconnection for leakage of electricity is isolated with electric energy meter and Fuse Type respectively by line bank Switch connection;One end of the inverter switching device is connected by line bank with electric energy meter, and the other end is connected with inverter.
Further, concentrator is equipped with the ammeter box, the concentrator is connected with electric energy meter.
Further, be equipped with the second breaker in the grid connection box, second breaker respectively with the first breaker, electricity Energy table is connected with inverter switching device.
Further, arrester electric brake and arrester are additionally provided with the grid connection box, one end of the arrester is grounded, separately One end is connected with one end of arrester electric brake, the other end of arrester electric brake by line bank respectively with inverter switching device and electric energy Table connects.
Further, the electric energy meter is three-phase intelligent electric-energy meter.
Further, the length of the grid-connected access case is respectively 120cm, 70cm and 140cm, the photovoltaic The material of grid integration case is stainless steel, and the front of the grid-connected access case is equipped with three fan chamber doors.
Further, the chamber door of the ammeter box is equipped with transparency window.
The access system of grid-connected access case includes grid-connected access case, inverter, distribution transformer, drop type and melts Disconnected device, the 3rd breaker and the 4th breaker, one end of the inverter are connected with photovoltaic plate, and the other end connects with grid-connected Cartonning connects, and one end of grid-connected access case and distribution transformer connects, and the other end and the drop type of distribution transformer fuse Device connects, and fuse switch is connected on user's 10kV busbares, is set between user 10kV busbares and public electric wire net 10kV circuits There is the 3rd breaker, the 4th breaker is equipped between public electric wire net 10kV circuits and public electric wire net 10kV busbares.
Compared with prior art, the beneficial effects of the invention are as follows:
1st, surge of the Surge Protector to direct, indirect thunder and lightning or instantaneous overvoltage is protected;Increase arrester and take shelter from the thunder Device electric brake prevents wherein some part fails, causes serious consequence equivalent to duplicate protection is added;
2nd, electric energy meter is three-phase intelligent electric-energy meter, fully ensures that the accuracy of metering;
3rd, concentrator is equipped with ammeter box, system maintenance can be made convenient;
4th, fuse type disconnector can ensure that the safety of circuit service personnel;
5th, the chamber door of ammeter box is equipped with transparency window, can observe electric energy meter at any time in the case of without opening chamber door.
Brief description of the drawings:
Fig. 1 is the structure diagram of the present invention;
Fig. 2 is the front view of the present invention;
The system schema that Fig. 3 is the present invention accesses schematic diagram.
In figure:1st, ammeter box;2nd, isolation board;3rd, the first breaker;4th, the second breaker;5th, Surge Protector;6th, take shelter from the thunder Device electric brake;7th, arrester;8th, protector with automatic reconnection for leakage of electricity;9th, inverter switching device;10th, grid connection box;11st, Fuse Type is kept apart Close;12nd, line bank;13rd, concentrator;14th, electric energy meter;15th, transparency window;16th, chamber door;17th, photovoltaic plate;18th, inverter;19、 Grid-connected access case;20th, distribution transformer;21st, fuse switch;22nd, user 10kV busbares;23rd, the 3rd breaker; 24th, public electric wire net 10kV circuits;25th, the 4th breaker;26th, public electric wire net 10kV busbares.
Embodiment:
Below by specific embodiment and with reference to attached drawing, the invention will be further described.
Embodiment 1:
As shown in Figure 1, a kind of grid-connected access case, including ammeter box 1 and grid connection box 10, ammeter box 1 and grid connection box 10 Between be equipped with isolation board 2, ammeter box 1 is located at the top of grid connection box 10, and isolation board 2 is equipped with threading hole, electricity is equipped with ammeter box 1 Can table 14, the top of grid connection box 10 is mounted with line bank 12, be equipped with grid connection box 10 first breaker 3, Surge Protector 5, Protector with automatic reconnection for leakage of electricity 8, inverter switching device 9 and fuse type disconnector 11;One end of first breaker 3 is protected with surge Shield device 5 connects, and the other end is connected by line bank 12 with electric energy meter 14;Protector with automatic reconnection for leakage of electricity 8 passes through line bank 12 It is connected respectively with electric energy meter 14 and fuse type disconnector 11;One end of inverter switching device 9 passes through line bank 12 and electric energy meter 14 Connection, the other end are connected with inverter 18.
Embodiment 2:
A kind of grid-connected access case, ammeter box 1 is interior to be equipped with concentrator 13, and concentrator 13 is connected with electric energy meter 14;It is grid-connected The second breaker 4 is equipped with case 10, the second breaker 4 is connected with the first breaker 3, electric energy meter 14 and inverter switching device 9 respectively. Other parts are same as Example 1.
Embodiment 3:
As shown in Fig. 2, a kind of grid-connected access case, arrester electric brake 6 and arrester 7 are additionally provided with grid connection box 10, is kept away One end ground connection of thunder device 7, the other end are connected with one end of arrester electric brake 6, and the other end of arrester electric brake 6 passes through line bank 12 It is connected respectively with inverter switching device 9 and electric energy meter 14;Electric energy meter 14 is three-phase intelligent electric-energy meter;Grid-connected access case 19 Length is respectively 120cm, 70cm and 140cm, and the material of grid-connected access case 19 is stainless steel, grid-connected to connect The front of cartonning 19 is equipped with three fan chamber doors 16;The chamber door 16 of ammeter box 1 is equipped with transparency window 15.Other parts and 2 phase of embodiment Together.
Embodiment 4:
As shown in figure 3, a kind of access system using grid-connected access case includes grid-connected access case 19, inverter 18th, distribution transformer 20, fuse switch 21, the 3rd breaker 23 and the 4th breaker 25, one end of inverter 18 and light Volt plate 17 connects, and the other end is connected with grid-connected access case 19, grid-connected access case 19 and the one of distribution transformer 20 End connection, the other end of distribution transformer 20 are connected with fuse switch 21, and fuse switch 21 is connected to user 10kV On busbar 22, the 3rd breaker 23, public electric wire net 10kV are equipped between user 10kV busbares 22 and public electric wire net 10kV circuits 24 The 4th breaker 25 is equipped between circuit 24 and public electric wire net 10kV busbares 26.
Surge of the Surge Protector 5 to direct, indirect thunder and lightning or instantaneous overvoltage is protected;Increase arrester 7 and take shelter from the thunder Device electric brake 6 prevents wherein some part fails, causes serious consequence equivalent to duplicate protection is added.
Electric energy meter 14 is three-phase intelligent electric-energy meter, fully ensures that the accuracy of metering, precision is active 0.5S grades, idle 2.0 grades, possess the functions such as two-way active and four-quadrant reactive measurement, logout, equipped with standard communication interface;Electric quantity acquisition is believed Breath can accurately upload to related administration of power networks department.
Concentrator 13 is equipped with ammeter box 1, the model DJGZ23-SEA3700 of concentrator 13, has rapidity, stabilization Property and reliability;System maintenance can be made convenient, grid entry point relevant information can be checked by backstage, and support backstage is long-range to rise Level and remote control.
Fuse type disconnector 11 when isolated power supply, disjunction load to can substantially observe, it is ensured that circuit service personnel Safety.
First breaker 3 and the second breaker 4 play overload and short-circuit protection function, when over-pressed, under-voltage, mistake occurs in circuit Stream, short circuit, zero curve disconnection, electric leakage etc. can all trigger the first breaker 3 or the second breaker 4 trips, and automatic reclosing leaks electricity Protector 8 can ensure that automatic close a floodgate again is powered and can automatically save tripping information after a certain interval, including tripping is former The information such as cause, voltage, electric current, leakage current;It can alarm when breaking down, failure locking, separating brake instruction light at the same time, liquid crystal Display screen shows corresponding failure cause;Alarm controller and alarming horn need not be further added by, reduces the access of circuit, that is, subtracts The generation of failure is lacked.
In addition also had using protector with automatic reconnection for leakage of electricity 8:1) under-voltage or overvoltage protection, when voltage is low or high When setting value, protector disconnects power supply automatically;After voltage is normal, automatic closing is powered;2) short circuit occurs for circuit or electric current is big When rated current, protector with automatic reconnection for leakage of electricity 8, which disconnects, implements protection;3) it is automatic to disconnect when zero firewire is reversed, avoid Electric appliance burns the generation with accident;4) closing by hand, when be not required automatic closing when, may be selected manually close a floodgate, completely with Normal circuit breaker equally operates, from functions such as Electronic controls.
The chamber door 16 of ammeter box 1 is equipped with transparency window 15, can observe electric energy at any time in the case of without opening chamber door 16 Table 14.
Grid-connected access case 19 takes suspension type to install, and lower edge is not less than 2.0m apart from ground, has flood control demand to fit When increasing;Photovoltaic plate 17 is accessed by grid-connected 19 lower section of access case, and inlet wire uses cable such as copper core, aluminium core or rare earth high-iron Aluminium alloy core, or crosslinked polyetylene insulated soft copper conducting wire, according to put cable underground laying when, by grid-connected access case 19 bottom Inlet wire;Grid-connected access 19 outlet of case selects JKTRYJ-1-1 × 300mm to the low-pressure side of distribution transformer 202It is aerial exhausted Edge conducting wire or ZC-EFR-0.6/1kV-300 flexible cables.
The low-pressure side of distribution transformer 20 is connected with the fuse type disconnector 11 in grid-connected access case 19, photovoltaic panel Part 17 by inverter 18 with it is grid-connected access case 19 in inverter switching device 9 be connected, the high-pressure side of distribution transformer 20 and Fuse switch 21 is installed between user 10kV busbares 22, plays a protective role and facilitates switching operation.

Claims (8)

1. a kind of grid-connected access case, including ammeter box (1) and grid connection box (10), between ammeter box (1) and grid connection box (10) Equipped with isolation board (2), ammeter box (1) is located at the top of grid connection box (10), and the isolation board (2) is equipped with threading hole, the electricity Electric energy meter (14) is equipped with electricity box (1), line bank (12) is mounted with above the grid connection box (10), it is characterised in that:Institute State and the first breaker (3), Surge Protector (5), protector with automatic reconnection for leakage of electricity (8), inverter are equipped with grid connection box (10) Switch (9) and fuse type disconnector (11);One end of first breaker (3) is connected with Surge Protector (5), the other end It is connected by line bank (12) with electric energy meter (14);The protector with automatic reconnection for leakage of electricity (8) passes through line bank (12) difference It is connected with electric energy meter (14) and fuse type disconnector (11);One end of the inverter switching device (9) by line bank (12) with Electric energy meter (14) connects, and the other end is connected with inverter (18).
2. grid-connected access case according to claim 1, it is characterised in that:Concentrator is equipped with the ammeter box (1) (13), the concentrator (13) is connected with electric energy meter (14).
3. grid-connected access case according to claim 2, it is characterised in that:It is disconnected that second is equipped with the grid connection box (10) Road device (4), second breaker (4) are connected with the first breaker (3), electric energy meter (14) and inverter switching device (9) respectively.
4. grid-connected access case according to claim 3, it is characterised in that:It is additionally provided with the grid connection box (10) lightning-arrest Device electric brake (6) and arrester (7), one end ground connection of the arrester (7), the other end are connected with the one end of arrester electric brake (6), The other end of arrester electric brake (6) is connected with inverter switching device (9) and electric energy meter (14) respectively by line bank (12).
5. grid-connected access case according to claim 4, it is characterised in that:The electric energy meter (14) is three-phase intelligent electricity Can table.
6. grid-connected access case according to claim 5, it is characterised in that:The grid-connected access case (19) Length is respectively 120cm, 70cm and 140cm, and the material of the grid-connected access case (19) is stainless steel, described The front of grid-connected access case (19) is equipped with three fan chamber doors (16).
7. grid-connected access case according to claim 6, it is characterised in that:On the chamber door (16) of the ammeter box (1) Equipped with transparency window (15).
8. using the access system of the grid-connected access case as described in claim 1-7:It is characterized in that:Including grid-connected It is disconnected to access case (19), inverter (18), distribution transformer (20), fuse switch (21), the 3rd breaker (23) and the 4th Road device (25), one end of the inverter (18) are connected with photovoltaic plate (17), and the other end connects with grid-connected access case (19) Connect, grid-connected access case (19) is connected with one end of distribution transformer (20), and the other end of distribution transformer (20) is with falling Formula fuse (21) connects, and fuse switch (21) is connected on user 10kV busbares (22), user 10kV busbares (22) with The 3rd breaker (23), public electric wire net 10kV circuits (24) and public electric wire net 10kV are equipped between public electric wire net 10kV circuits (24) The 4th breaker (25) is equipped between busbar (26).
CN201711097926.7A 2017-11-09 2017-11-09 Grid-connected access case and its access system Pending CN107968329A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711097926.7A CN107968329A (en) 2017-11-09 2017-11-09 Grid-connected access case and its access system

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Application Number Priority Date Filing Date Title
CN201711097926.7A CN107968329A (en) 2017-11-09 2017-11-09 Grid-connected access case and its access system

Publications (1)

Publication Number Publication Date
CN107968329A true CN107968329A (en) 2018-04-27

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108683150A (en) * 2018-06-23 2018-10-19 安徽富煌电控设备有限公司 A kind of grid-connected cabinet of automatic reclosing exchange
CN108718098A (en) * 2018-07-17 2018-10-30 陈二东 A kind of large-scale photovoltaic wind power information access device
CN108879761A (en) * 2018-06-23 2018-11-23 安徽富煌电控设备有限公司 A kind of grid-connected cabinet of sensitivity self-resetting type

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103364631A (en) * 2013-07-26 2013-10-23 国家电网公司 High-voltage user photovoltaic power generation electric energy metering system and method thereof
CN205429554U (en) * 2016-03-21 2016-08-03 大连电力勘察设计院有限公司 Small -size low pressure distributing type photovoltaic power plant inserts public power grid's complete set combination equipment
CN205863941U (en) * 2016-07-14 2017-01-04 嘉兴恒创电力设计研究院有限公司 A kind of point of family low pressure grid-connected access case
CN107026473A (en) * 2017-05-06 2017-08-08 杨子琦 A kind of grid-connected control cabinet of novel intelligent economize on electricity

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103364631A (en) * 2013-07-26 2013-10-23 国家电网公司 High-voltage user photovoltaic power generation electric energy metering system and method thereof
CN205429554U (en) * 2016-03-21 2016-08-03 大连电力勘察设计院有限公司 Small -size low pressure distributing type photovoltaic power plant inserts public power grid's complete set combination equipment
CN205863941U (en) * 2016-07-14 2017-01-04 嘉兴恒创电力设计研究院有限公司 A kind of point of family low pressure grid-connected access case
CN107026473A (en) * 2017-05-06 2017-08-08 杨子琦 A kind of grid-connected control cabinet of novel intelligent economize on electricity

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108683150A (en) * 2018-06-23 2018-10-19 安徽富煌电控设备有限公司 A kind of grid-connected cabinet of automatic reclosing exchange
CN108879761A (en) * 2018-06-23 2018-11-23 安徽富煌电控设备有限公司 A kind of grid-connected cabinet of sensitivity self-resetting type
CN108718098A (en) * 2018-07-17 2018-10-30 陈二东 A kind of large-scale photovoltaic wind power information access device
CN108718098B (en) * 2018-07-17 2022-12-20 国网浙江省电力有限公司杭州市富阳区供电公司 Large-scale photovoltaic wind power information access device

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Application publication date: 20180427