CN205595896U - Net monitored control system is joined in marriage to distributing type photovoltaic - Google Patents

Net monitored control system is joined in marriage to distributing type photovoltaic Download PDF

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Publication number
CN205595896U
CN205595896U CN201620364615.7U CN201620364615U CN205595896U CN 205595896 U CN205595896 U CN 205595896U CN 201620364615 U CN201620364615 U CN 201620364615U CN 205595896 U CN205595896 U CN 205595896U
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China
Prior art keywords
distribution
photovoltaic
processing unit
central processing
distribution lines
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CN201620364615.7U
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Chinese (zh)
Inventor
刘志祥
李运兵
张�诚
曾光
余江山
肖本胜
余述良
杨爱岭
刘春阳
汪洋
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State Grid Corp of China SGCC
Liuan Power Supply Co of State Grid Anhui Electric Power Co Ltd
Jinzhai Power Supply Co of State Grid Anhui Electric Power Co Ltd
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State Grid Corp of China SGCC
Liuan Power Supply Co of State Grid Anhui Electric Power Co Ltd
Jinzhai Power Supply Co of State Grid Anhui Electric Power Co Ltd
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Application filed by State Grid Corp of China SGCC, Liuan Power Supply Co of State Grid Anhui Electric Power Co Ltd, Jinzhai Power Supply Co of State Grid Anhui Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
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Abstract

The utility model relates to a net monitored control system is joined in marriage to distributing type photovoltaic compares with prior art to have solved and to join in marriage the defect that the network system was effectively supervised to the photovoltaic. The utility model discloses a backstage control end, main distribution lines and a plurality of distribution lines, a plurality of distribution lines connects on main distribution lines, and the photovoltaic module connects on distribution lines and through the main distribution lines of distribution lines access, installs low pressure JP cabinet on the main distribution lines, installs current transformer in the low pressure JP cabinet, and current transformer installs on main distribution lines, still includes isolated island distribution lines 1 and a plurality of photovoltaic distribution lines 2, isolated island monitoring devices install on main distribution lines, photovoltaic monitoring device install on distribution lines. The utility model discloses set up photovoltaic area monitoring system, will disperse each the photovoltaic power generation device centralized management on joining in marriage the net twine way, accomplished the unified regulation and control of joining in marriage net twine way distributing type photovoltaic.

Description

A kind of distributed photovoltaic monitoring system of distribution network
Technical field
This utility model relates to photovoltaic distribution technical field, specifically a kind of distributed photovoltaic monitoring system of distribution network.
Background technology
Photovoltaic technology is widely used in daily life, and in mountainous rural area, man of peasant household the most generally realizes installation and the use of photovoltaic panel.Substantial amounts of peasant household distribution line is with on the also link of distribution trunk line, and island effect easily occurs in distribution trunk line, the distribution line passive state that the distribution line of peasant household also easily produces because of photovoltaic panel short of electricity.And the actuating quantity of the original switch of user's photovoltaic system and electric parameters cannot monitor in power system the most in real time, this just works to operation of power networks and line maintenance and brings huge potential safety hazard.How to develop a kind of supervising device being directed to photovoltaic distribution network systems to have become as urgent need and solve the technical problem that.
Utility model content
The purpose of this utility model is to solve the defect effectively cannot supervised in prior art for photovoltaic distribution network systems, it is provided that a kind of distributed photovoltaic monitoring system of distribution network solves the problems referred to above.
To achieve these goals, the technical solution of the utility model is as follows:
A kind of distributed photovoltaic monitoring system of distribution network, including background control end, distribution trunk line and several distribution lines, several distribution lines are attempted by distribution trunk line, photovoltaic module is connected on distribution line and accesses distribution trunk line by distribution line, low pressure JP cabinet is installed on distribution trunk line, being provided with current transformer in low pressure JP cabinet, current transformer is arranged on distribution trunk line
Also including isolated island monitoring device and several photovoltaic supervising devices, described isolated island monitoring device is arranged on distribution trunk line, and described photovoltaic supervising device is arranged on distribution line;
Described isolated island monitoring device includes central processing unit A and voltage sensor A, voltage sensor A is arranged on distribution trunk line, the data output end of described current transformer is connected with the data input pin of current sensor A, the data output end of current sensor A is connected with first data input pin of central processing unit A, the data output end of voltage sensor A is connected with second data input pin of central processing unit A, and the signal of communication outfan of central processing unit A is connected with communication module A;
Described photovoltaic supervising device includes central processing unit B, current sensor B and voltage sensor B, current sensor B and voltage sensor B is installed on distribution line, master switch is concatenated on distribution line, the data output end of current sensor B is connected with first data input pin of central processing unit B, the data output end of voltage sensor B is connected with second data input pin of central processing unit B, the control signal input of master switch is connected with the control signal outfan of central processing unit B, and the signal of communication outfan of central processing unit B is connected with communication module B;Communication module A and communication module B all carries out radio communication with background control end and is connected.
Also include that manual switch controller, manual switch controller are connected with the control signal input of central processing unit A.
Also include that electrification display, described electrification display are connected with the display signal output part of central processing unit A.
Beneficial effect
A kind of distributed photovoltaic monitoring system of distribution network of the present utility model, compared with prior art establish photovoltaic region monitoring system, will be dispersed in each photovoltaic power generation apparatus centralized management on distribution line, complete the unified regulation and control of distribution line distributed photovoltaic (3KW-60KW).This utility model can not only realize effective monitoring of island effect, effectively can also supervise for the voltage status of photovoltaic module, voltage status according to photovoltaic module realizes the break-make management of each man of peasant household distribution line, thus realize remote zone deciliter, single-point deciliter and the automatic deciliter function to grid-connected point each in distribution line, and there is grid-connected switch deciliter state multiple check, synchronized update, Real-time Alarm function, substantially increase distributed photovoltaic safety and reliability in distribution line.
Accompanying drawing explanation
Fig. 1 is circuit mounting structure figure of the present utility model;
Fig. 2 is the circuit catenation principle block diagram of isolated island monitoring device in this utility model;
Fig. 3 is the circuit catenation principle block diagram of photovoltaic supervising device in this utility model;
Wherein, 1-isolated island monitoring device, 2-photovoltaic supervising device, 3-background control end, 4-distribution trunk line, 5-distribution line, 6-photovoltaic module, 7-low pressure JP cabinet, 8-current transformer, 11-central processing unit A, 12-voltage sensor A, 13-current sensor A, 14-communication module A, 15-manual switch controller, 16-electrification display, 21-central processing unit B, 22-current sensor B, 23-voltage sensor B, 24-master switch, 25-communication module B, 26-ammeter module, 31-load A, 32-load B.
Detailed description of the invention
By making, architectural feature of the present utility model and effect of being reached are had a better understanding and awareness, coordinate detailed description in order to preferred embodiment and accompanying drawing, be described as follows:
As shown in Figure 1, a kind of distributed photovoltaic monitoring system of distribution network described in the utility model, including background control end 3, distribution trunk line 4 and several distribution lines 5, background control end 3 is the control room of overall power system, can also be the mobile terminal of maintainer for convenience of use.Several distribution lines 5 are attempted by distribution trunk line 4, can be with installation load A31 and load B32 on distribution line 5, photovoltaic module 6 is connected on distribution line 5 and accesses distribution trunk line 4 by distribution line 5, the photovoltaic panel that photovoltaic module 6 is installed for man of peasant household, it gathers after solar energy is converted into electric energy at ordinary times, for subscriber household and can use on unnecessary charge transport to distribution trunk line 4 for unified collection of Utilities Electric Co..By existing code requirement, low pressure JP cabinet 7 is installed on distribution trunk line 4, current transformer 8 is installed in low pressure JP cabinet 7.Current transformer 8 is arranged on distribution trunk line 4 by the mode of prior art, and i.e. distribution line 4 is through the ring-shaped magnetic core of current transformer 8.
Owing to, in photovoltaic distribution, easily there is island effect on distribution trunk line 4, being monitored the generation of island effect by isolated island monitoring device 1 at this, isolated island monitoring device 1 is arranged on distribution trunk line 4.Simultaneously, it is directed to the photovoltaic system of man of distribution line 5(peasant household) for, when photovoltaic module 6 does not produces electricity in long-term overcast and rainy environment, then it is not intended to it and distribution trunk line 4 is also produced load effect, the most in this case, distribution line 5 preferably exits distribution trunk line 4, is supervised distribution line 5 by photovoltaic supervising device 2 at this, and photovoltaic supervising device 2 is arranged on distribution line 5.
As in figure 2 it is shown, isolated island monitoring device 1 includes that central processing unit A11 and voltage sensor A12, voltage sensor A12 are arranged on distribution trunk line 4, voltage sensor A12 obtains the magnitude of voltage on distribution trunk line 4.Owing to the magnitude of current on distribution trunk line 4 is relatively big, therefore obtaining current value at this by current transformer 8, the data output end of current transformer 8 is connected with the data input pin of current sensor A13.The data output end of current sensor A13 is connected with first data input pin of central processing unit A11, the data output end of voltage sensor A12 is connected with second data input pin of central processing unit A11, and electric quantity data is all sent to central processing unit A11 by current sensor A13 and voltage sensor A12.Being connected with communication module A14, communication module A14 on the signal of communication outfan of central processing unit A11 to carry out radio communication with background control end 3 and be connected, background control end 3 is transmitted information by communication module A14 by central processing unit A11.
As it is shown on figure 3, photovoltaic supervising device 2 includes central processing unit B21, current sensor B22 and voltage sensor B23.Due to distribution line 5(user side) on charge value less, therefore can directly use current sensor B22 and voltage sensor B23 to obtain charge value, current sensor B22 and voltage sensor B23 is installed on distribution line 5.Concatenate master switch 24 on distribution line 5, closed path and the open circuit that can control distribution line 5 by master switch 24 disconnected.Ammeter module 26 can also be installed, to obtain the charge value of user side on distribution line 5.In like manner, the data output end of current sensor B22 is connected with first data input pin of central processing unit B21, the data output end of voltage sensor B23 is connected with second data input pin of central processing unit B21, and electric quantity data is sent to central processing unit B21 by current sensor B22 and voltage sensor B23.The control signal input of master switch 24 is connected with the control signal outfan of central processing unit B21, and master switch 24 is closed, disconnects control by central processing unit B21.It is connected with communication module B25, central processing unit B21 on the signal of communication outfan of central processing unit B21 to carry out radio communication with background control end 3 be connected by communication module B25.
In order to isolated island monitoring device 1 is carried out Artificial Control process, can install manual switch controller 15 in isolated island monitoring device 1 additional, manual switch controller 15 is connected with the control signal input of central processing unit A11.The external display of isolated island monitoring device 1 for convenience, it is also possible to installing electrification display 16 in isolated island monitoring device 1 additional, electrification display 16 is connected with the display signal output part of central processing unit A11.In like manner, photovoltaic supervising device 2 can also be carried out manual switch controller and electrification display installs design additional.
Also provide for a kind of control method for distributed photovoltaic monitoring system of distribution network at this, it is mainly used in island effect monitoring and photovoltaic panel is monitored, and comprises the following steps:
The first step, island effect monitoring, isolated island monitoring device 1 monitors on distribution trunk line 4 whether island effect occurs in real time.It specifically comprises the following steps that
(1) current value on current sensor A13 detection current transformer 8, the magnitude of voltage on voltage sensor A12 detection distribution trunk line 4.
(2) current sensor A13 and voltage sensor A12 all sends the current value collected and magnitude of voltage to central processing unit A11.
(3) central processing unit A11 carries out the judgement of current value and magnitude of voltage, when the current value that current sensor A13 collects be zero and the magnitude of voltage that collects of voltage sensor A12 more than 44V time, specify according to power system industry, be only 0 when current value and magnitude of voltage more than 44V time, just can think and island effect now occurs, central processing unit A11 sends island effect warning message by communication module A14 to background control end 3.
Second step, the nothing pressure of grid-connected point detects, and photovoltaic supervising device 2 monitors whether distribution line 5 exists without pressure phenomenon in real time, and it specifically comprises the following steps that
(1) voltage sensor B23 detects the magnitude of voltage on distribution line 5 in real time, and will acquire magnitude of voltage and be sent to central processing unit B21.
(2) interior with it for the magnitude of voltage got is contrasted by central processing unit B21 without pressure voltage threshold, is 44V at this nothing pressure voltage threshold, is probably electrostatic potential less than 44V.If magnitude of voltage is more than without pressure voltage threshold, then the photovoltaic module 6 on explanation current power distribution circuit 5 is for there being pressure condition, and current photovoltaic module 6 is working properly.If magnitude of voltage is less than without pressure voltage threshold, then the photovoltaic module 6 on explanation current power distribution circuit 5 is passive state, now needs distribution line 5 is exited distribution trunk line 4.Central processing unit B21 postpones 10 seconds, and master switch 24 is sent break signal.
(3) off state monitoring, after central processing unit B21 sends break signal, the most not can determine that whether distribution line 5 has dropped out distribution trunk line 4, then needs at this to be monitored off state.After central processing unit B21 sends break signal 30 seconds to master switch 24, the current value on current sensor B22 detection distribution line 5, and current value will be acquired be sent to central processing unit B21.The current value got is judged by central processing unit B21;If current value is zero, then current master switch 24 open circuit success is described;If current value is not zero, then current master switch 24 open circuit failure being described, central processing unit B21 sends combined floodgate abnormality alarming signal by communication module B25 to background control end 3.
After having determined that distribution line 5 exits distribution trunk line 4 operation, when photovoltaic module 6 recovers Power Reserve and collects, then distribution line 5 has been also performed to pressure condition input.Whether the photovoltaic module 6 that photovoltaic supervising device 2 is monitored on distribution line 5 in real time recovers there is pressure condition, and it specifically includes following steps:
(1) voltage sensor B23 detects the magnitude of voltage on distribution line 5 in real time, and will acquire magnitude of voltage and be sent to central processing unit B21.
(2) the pressure voltage threshold that has interior with it for the magnitude of voltage got is contrasted by central processing unit B21, and having pressure voltage threshold at this is 190V.If magnitude of voltage is less than there being pressure voltage threshold, then the photovoltaic module 6 on explanation current power distribution circuit 5 is still passive state, continues to keep distribution line 5 to exit distribution trunk line 4 state.If magnitude of voltage is more than there being pressure voltage threshold persistently more than 10 seconds, then the photovoltaic module 6 on explanation current power distribution circuit 5 has reverted to pressure condition, and photovoltaic module 6 has recovered normally to use, and central processing unit B21 sends path control information to master switch 24.
Of the present utility model ultimate principle, principal character and of the present utility model advantage have more than been shown and described.Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; simply principle of the present utility model described in above-described embodiment and description; on the premise of without departing from this utility model spirit and scope, this utility model also has various changes and modifications, and these changes and improvements both fall within the range of claimed this utility model.The protection domain that this utility model requires is defined by appending claims and equivalent thereof.

Claims (3)

1. a distributed photovoltaic monitoring system of distribution network, including background control end (3), distribution trunk line (4) and several distribution lines (5), several distribution lines (5) are attempted by distribution trunk line (4), photovoltaic module (6) is connected on distribution line (5) and above and accesses distribution trunk line (4) by distribution line (5), low pressure JP cabinet (7) is installed on distribution trunk line (4), current transformer (8) is installed in low pressure JP cabinet (7), current transformer (8) is arranged on distribution trunk line (4), it is characterised in that:
Also including isolated island monitoring device (1) and several photovoltaic supervising devices (2), described isolated island monitoring device (1) is arranged on distribution trunk line (4), and described photovoltaic supervising device (2) is arranged on distribution line (5);
Described isolated island monitoring device (1) includes central processing unit A(11) and voltage sensor A(12), voltage sensor A(12) it is arranged on distribution trunk line (4), the data output end of described current transformer (8) and current sensor A(13) data input pin be connected, current sensor A(13) data output end and central processing unit A(11) the first data input pin be connected, voltage sensor A(12) data output end and central processing unit A(11) the second data input pin be connected, central processing unit A(11) signal of communication outfan on be connected with communication module A(14);
Described photovoltaic supervising device (2) includes central processing unit B(21), current sensor B(22) and voltage sensor B(23), current sensor B(22) and voltage sensor B(23) be installed on distribution line (5), master switch (24) is concatenated on distribution line (5), current sensor B(22) data output end and central processing unit B(21) the first data input pin be connected, voltage sensor B(23) data output end and central processing unit B(21) the second data input pin be connected, the control signal input of master switch (24) and central processing unit B(21) control signal outfan be connected, central processing unit B(21) signal of communication outfan on be connected with communication module B(25);Communication module A(14) and communication module B(25) all carry out radio communication with background control end (3) and be connected.
A kind of distributed photovoltaic monitoring system of distribution network the most according to claim 1, it is characterised in that: also include manual switch controller (15), manual switch controller (15) and central processing unit A(11) control signal input be connected.
A kind of distributed photovoltaic monitoring system of distribution network the most according to claim 2, it is characterised in that: also include electrification display (16), described electrification display (16) and central processing unit A(11) display signal output part be connected.
CN201620364615.7U 2016-04-27 2016-04-27 Net monitored control system is joined in marriage to distributing type photovoltaic Active CN205595896U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105762938A (en) * 2016-04-27 2016-07-13 国网安徽省电力公司金寨县供电公司 Distributed photovoltaic distribution network monitoring system and control method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105762938A (en) * 2016-04-27 2016-07-13 国网安徽省电力公司金寨县供电公司 Distributed photovoltaic distribution network monitoring system and control method thereof
CN105762938B (en) * 2016-04-27 2018-06-29 国网安徽省电力公司金寨县供电公司 A kind of distributed photovoltaic monitoring system of distribution network and its control method

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