CN104852403A - User side micro grid system capable of performing island detection - Google Patents
User side micro grid system capable of performing island detection Download PDFInfo
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- CN104852403A CN104852403A CN201510212482.1A CN201510212482A CN104852403A CN 104852403 A CN104852403 A CN 104852403A CN 201510212482 A CN201510212482 A CN 201510212482A CN 104852403 A CN104852403 A CN 104852403A
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Abstract
The invention provides a user side micro grid system capable of performing island detection, comprising a micro grid bus, a primary system and a secondary system. The micro grid bus is connected with a 380V grid through a contactor and a circuit breaker. The primary system comprises a photovoltaic power generation system, an energy storage system, and load devices. The photovoltaic power generation system and the energy storage system are respectively connected with the micro grid bus through a contactor and a circuit breaker. Each load device is connected with the photovoltaic power generation system, the energy storage system or the grid through a contactor and a circuit breaker. The secondary system is a master control hardware programmable micro grid island detection system comprising a central processor module which receives island alarm signals sent by the photovoltaic power generation system and the energy storage system and triggers an instruction according to the received signals, a communication module which transmits the island alarm signals sent by the photovoltaic power generation system and the energy storage system to the central processor module and issues a communication control instruction, a digital input module, a digital output module, an analog input module, and an analog output module.
Description
Technical field
The invention belongs to micro-capacitance sensor islanding detect technical field, be specifically related to a kind of user side micro-grid system that can carry out islanding detect.
Background technology
Micro-capacitance sensor is incorporated into the power networks and islet operation two states.The generation of isolated island not only can cause power system device to damage, and also there will be the series of problems such as the life security threatening electric power system maintenance personal time serious.Therefore, grid-connected photovoltaic system must possess islanding detect function, to ensure the safe operation of electrical network.
Up to the present, the multiple islanding detect method based on distributed power source has been developed.Detect the operating state of each relay of distribution the most directly in the mode of grid side Usage data collection and supervisor control or carrier communication, this method does not have check frequency, but economic cost is too high, poor practicability.Therefore, overwhelming majority research all concentrates on active and the passive detection method of inverter side.
Summary of the invention
For the shortcoming of prior art, the object of this invention is to provide a kind of user side micro-grid system that can carry out islanding detect, this system is significant to the research carrying out micro-grid system monitor and forecast aspect.
To achieve these goals, the invention provides a kind of user side micro-grid system that can carry out islanding detect, this user side micro-grid system comprises: micro-capacitance sensor bus, primary system, electrical secondary system;
Wherein, micro-capacitance sensor bus is connected with 380V electrical network with circuit breaker by contactor;
Primary system comprises photovoltaic generating system, energy-storage system, load equipment; Photovoltaic generating system is connected with described micro-capacitance sensor bus with circuit breaker by contactor with energy-storage system; Load equipment is connected by contactor and circuit breaker and photovoltaic generating system or energy-storage system or electrical network;
Electrical secondary system is the micro-capacitance sensor alone island detection system of master control hardware programmable, and it comprises:
CPU module, it receives the isolated island alarm signal of photovoltaic generating system and energy-storage system transmission, according to the signal triggering command received;
Communication module, its isolated island alarm signal photovoltaic generating system and energy-storage system sent transfers to CPU module and assigns Control on Communication instruction;
Digital quantity input module, it gathers all circuit-breaker status;
Digital output module, its output relay control signal;
Analog input mModule, it gathers intensity of illumination;
Analog output module, it is output for subsequent use.
Operation principle of the present invention is as follows: photovoltaic generating system and energy-storage system have islanding detect ability, can produce alarm signal when islet operation.Micro-capacitance sensor alone island detection system by communication module Real-time Collection photovoltaic system and energy-storage system running status, and is analyzed alarm signal by CPU module.If alarm free signal, then proof system normal operation, occurs without isolated island; If there is isolated island signal, then determines the particular location that isolated island occurs, and take corresponding control strategy.
The present invention sets up and is applicable to the alone island detection system of user side micro-capacitance sensor, can the real-time running state of monitor optical photovoltaic generating system, energy-storage system and load equipment in real time; Meanwhile, CPU module, by analyzing alarm signal, can be determined rapidly the position that isolated island occurs, and take corresponding control strategy.Thus important engineer applied value has been run safely and steadly to carrying out micro-grid system.
According to another embodiment of the present invention, photovoltaic generating system comprises photovoltaic battery panel, photovoltaic DC distribution box, photovoltaic DC-to-AC converter, and photovoltaic battery panel is connected with photovoltaic DC distribution box, and photovoltaic DC distribution box is connected with photovoltaic DC-to-AC converter.
According to another embodiment of the present invention, energy-storage system comprises lithium battery group and energy storage two way convertor, and the lithium battery group after series connection is connected with energy storage two way convertor.
According to another embodiment of the present invention, load equipment comprises bulb group, load box, motor and electronic load, bulb group, load box, motor and electronic load, all each via circuit breaker and contactor, are connected with photovoltaic battery panel or lithium battery group or electrical network.
Compared with prior art, the present invention possesses following beneficial effect:
The present invention sets up and is applicable to the alone island detection system of user side micro-capacitance sensor, can the real-time running state of monitor optical photovoltaic generating system, energy-storage system and load equipment in real time; Meanwhile, CPU module, by analyzing alarm signal, can be determined rapidly the position that isolated island occurs, and take corresponding control strategy.Thus important engineer applied value has been run safely and steadly to carrying out micro-grid system.
Below in conjunction with accompanying drawing, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the user side micro-grid system structure chart of embodiment 1;
Fig. 2 is in embodiment 1, the Organization Chart of electrical secondary system.
Embodiment
Embodiment 1
Fig. 1 is the structure chart of the user side micro-grid system that can carry out islanding detect in the present embodiment.With reference to shown in Fig. 1, the user side micro-grid system of the present embodiment comprises micro-capacitance sensor bus, primary system and electrical secondary system.
Wherein, micro-capacitance sensor bus is connected with 380V electrical network with circuit breaker by contactor;
Primary system comprises: photovoltaic generating system, energy-storage system and load equipment.
Photovoltaic generating system is connected with micro-capacitance sensor bus with circuit breaker by contactor with energy-storage system; Micro-capacitance sensor bus is connected with circuit breaker 380V electrical network by contactor; Load equipment is connected with photovoltaic generating system or energy-storage system with circuit breaker by contactor.
In photovoltaic generating system, photovoltaic battery panel is connected with photovoltaic DC distribution box, and photovoltaic DC distribution box is connected with photovoltaic DC-to-AC converter; Lithium battery group in energy-storage system after series connection is connected with energy storage two way convertor; In load equipment, bulb group, load box, motor and electronic load are all connected each via a circuit breaker and a contactor and photovoltaic panel or lithium battery group or electrical network.
Electrical secondary system is the micro-capacitance sensor alone island detection system of master control hardware programmable, comprise there is data-handling capacity CPU module, communication module, digital quantity input/output module, analog input/output.
Fig. 2 is in the present embodiment, the Organization Chart of electrical secondary system.
With reference to shown in Fig. 2, electrical secondary system is the micro-capacitance sensor alone island detection system of master control hardware programmable, comprises central processor CPU module, communication module, digital quantity input DI module, digital output DO module, analog input AI module, analog output AO module.
CPU module receives the isolated island alarm signal of photovoltaic generating system and energy-storage system transmission, according to the signal triggering command received; Communication module is from photovoltaic generating system and energy-storage system image data and assign Control on Communication instruction; The all circuit-breaker status of digital quantity input DI module acquires; Digital output DO module output relay control signal; Analog input AI module acquires intensity of illumination signal; Analog output AO module is output for subsequent use.
In the present embodiment, relevant configuration is as follows:
CPU module: such as PC3486 (PLC type number): containing serial communication RS232 interface, application configuration Modbus RTU (Remote Terminal Unit) slave station, receive the isolated island alarm signal of photovoltaic generating system and energy-storage system transmission, according to the signal triggering command received.
Communication module: such as model IF1030, serial communication RS485 interface, application configuration Modbus RTU main website, isolated island alarm signal photovoltaic generating system and energy-storage system sent transfers to CPU module and assigns Control on Communication instruction.
The input of digital quantity input DI module 2: such as model DI9371,12 railway digital, 24Vdc, gathers all circuit-breaker status.
Digital output DO module 2: such as model DO9322,12 railway digitals export, 24Vdc 0.5A, output relay control signal.
Analog input AI module: such as model AI4622,4 tunnel analog inputs, can customize as ± 10V or 0-20mA, gather intensity of illumination.
Analog output AO module: such as model AO4622,4 road modulating output, can customize as ± 10V or 0-20mA, output for subsequent use.
Although the present invention discloses as above with preferred embodiment, and is not used to limit scope of the invention process.Any those of ordinary skill in the art, not departing from invention scope of the present invention, when doing a little improvement, namely every equal improvement done according to the present invention, should be scope of the present invention and contained.
Claims (4)
1. can carry out a user side micro-grid system for islanding detect, described user side micro-grid system comprises: micro-capacitance sensor bus, primary system, electrical secondary system; It is characterized in that,
Described micro-capacitance sensor bus is connected with 380V electrical network with circuit breaker by contactor;
Described primary system comprises photovoltaic generating system, energy-storage system, load equipment; Described photovoltaic generating system is connected with described micro-capacitance sensor bus with circuit breaker by contactor with described energy-storage system; Described load equipment is connected by contactor and circuit breaker and described photovoltaic generating system or described energy-storage system or electrical network;
Described electrical secondary system is the micro-capacitance sensor alone island detection system of master control hardware programmable, and it comprises:
CPU module, it receives the isolated island alarm signal of photovoltaic generating system and energy-storage system transmission, according to the signal triggering command received;
Communication module, its isolated island alarm signal photovoltaic generating system and energy-storage system sent transfers to CPU module and assigns Control on Communication instruction;
Digital quantity input module, it gathers all circuit-breaker status;
Digital output module, its output relay control signal;
Analog input mModule, it gathers intensity of illumination;
Analog output module, it is output for subsequent use.
2. user side according to claim 1 micro-grid system, it is characterized in that, described photovoltaic generating system comprises photovoltaic battery panel, photovoltaic DC distribution box, photovoltaic DC-to-AC converter, described photovoltaic battery panel is connected with described photovoltaic DC distribution box, and described photovoltaic DC distribution box is connected with described photovoltaic DC-to-AC converter.
3. user side according to claim 1 micro-grid system, is characterized in that, described energy-storage system comprises lithium battery group and energy storage two way convertor, and the described lithium battery group after series connection is connected with described energy storage two way convertor.
4. according to the user side micro-grid system one of claim 1-3 Suo Shu, it is characterized in that, described load equipment comprises bulb group, load box, motor and electronic load, described bulb group, described load box, described motor and described electronic load, all each via circuit breaker and contactor, are connected with described photovoltaic battery panel or described lithium battery group or electrical network.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510212482.1A CN104852403A (en) | 2015-04-29 | 2015-04-29 | User side micro grid system capable of performing island detection |
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| CN201510212482.1A CN104852403A (en) | 2015-04-29 | 2015-04-29 | User side micro grid system capable of performing island detection |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103167588A (en) * | 2011-12-13 | 2013-06-19 | 中兴通讯股份有限公司 | Wireless charging method, wireless base station, terminal and system |
| CN103915836A (en) * | 2014-03-07 | 2014-07-09 | 华南理工大学 | Laboratorial intelligent microgrid system based on various distributed power sources |
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2015
- 2015-04-29 CN CN201510212482.1A patent/CN104852403A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103167588A (en) * | 2011-12-13 | 2013-06-19 | 中兴通讯股份有限公司 | Wireless charging method, wireless base station, terminal and system |
| CN103915836A (en) * | 2014-03-07 | 2014-07-09 | 华南理工大学 | Laboratorial intelligent microgrid system based on various distributed power sources |
Non-Patent Citations (2)
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Application publication date: 20150819 |
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