CN101719677B - Control unit for zero counter current network integrating control device - Google Patents
Control unit for zero counter current network integrating control device Download PDFInfo
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- CN101719677B CN101719677B CN2009102206309A CN200910220630A CN101719677B CN 101719677 B CN101719677 B CN 101719677B CN 2009102206309 A CN2009102206309 A CN 2009102206309A CN 200910220630 A CN200910220630 A CN 200910220630A CN 101719677 B CN101719677 B CN 101719677B
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Abstract
The invention provides a control unit for a zero counter current network integrating control device, which is used in a zero counter current control device connected to the municipal power grid to realize the zero counter current of the device and prevent the back power from happening. The control unit is a control unit for the zero counter current control device, which can integrate renewable energy power, generated by solar photovoltaic power generation, wind electric power generation and the like, and the municipal power supply in a power grid. The control unit has the advantages of integrating the renewable energy power and the municipal power in a power grid, realizing the use of municipal power as backup power, making the renewable energy power used immediately as the renewable energy power is generated, making the device have the function of zero counter current control protection, realizing the equipment-level intrinsic safety and preventing the happening of the back power.
Description
Technical field
The present invention relates to the renewable energy power generation applied technical field, the control unit of the zero adverse current control system that particularly a kind of and municipal electrical network common network is used.
Background technology
Currently comprise the development of renewable new forms of energy such as solar power generation, wind power generation very rapidly, present application mode is mainly by having from two kinds of net type and grid types, and wherein grid type is used and is divided into reversible flow and can not adverse current two kinds again.
The reversible flow grid-connected system generates electricity and can directly flow to electrical network, gets into the electrical network unified allocation of resources.
Can not the adverse current grid-connected system parallelly connected with electrical network, renewable new energy resources system electric energy and electrical network are kept synchronously, realize supplying power to user load jointly.When renewable new energy resources system electric energy deficiency or disappearance, replenish or all provide electric energy to load by municipal electrical network; When renewable new energy resources system electric energy surpasses one's respective area electrical network load need for electricity; Through certain means renewable new energy resources system dump energy is handled or abandoned; Guarantee that dump energy does not pass through distribution transformer to the electricity network feed, strictness prevents " island effect ".
At present national standard " requirements of photovoltaic system interconnection technology " (GB/T 19939-2005) to the regulation of reverse power protection is: " system works under irreversible and net mode; when the adverse current that detects the secondary place of supply transformer be the specified output of inverter 5% the time, reverse power protection should be with photovoltaic system and electrical network disconnection in 0.5s-2s.”
This is to anti-reverse power requirement that can not the adverse current combining inverter, with the municipal safe operation of electric network that guarantees to be incorporated into the power networks with it and to use.Can find out thus yet, in the protection of combining inverter enforcement reverse power, the adverse current of 0.5s-2s take place in fact, be not to prevent that up hill and dale reverse power from taking place.
Summary of the invention
The control unit that the purpose of this invention is to provide a kind of zero counter current network integrating control device is a kind of control unit that makes the zero counter current network integrating control device that regenerative resource electric power such as solar energy power generating and wind power generation and utility grid common network use.
The technical scheme that adopts is:
A kind of control unit of zero counter current network integrating control device; This control unit is used in the adverse current control device of using with municipal electrical network common network, is the common network application apparatus of a kind of realization the " zero adverse current ", makes renewable energy system electric power in using with the civil power common network; Both realized that renewable energy system electric power " promptly sent out promptly and use "; Strict guarantee zero adverse current prevents that reverse power from taking place again, realizes the device level essential safety, initiatively prevention " island effect "; Guarantee the utility grid safe operation, this will eliminate the major technique obstacle that regenerative resource faces in applying.
The zero counter current network integrating control device connects n road regenerative resource direct current power (photoelectricity, wind-powered electricity generation etc.), converts to slightly highlyer than line voltage through parallel network reverse, and frequency, the 220V that phase place is consistent is single-phase or 380V three-phase alternating current and civil power common network are supplied power to consumer networks.
The zero counter current network integrating control device is made up of combining inverter, detecting unit, control unit, performance element, and its structured flowchart is as shown in Figure 1.
The regenerative resource direct current power can be divided into n road or a tunnel directly or through the input of header box as combining inverter.
Behind combining inverter, regenerative resource electric power changes into than line voltage slightly height, frequency, 220V two phase or 380V three-phase alternating currents that phase place is consistent, supplies power to the user power utilization net through bus and performance element and civil power common network.
The Device Testing unit is responsible for 1. n road regenerative resource electric weight; 2. the total electric weight of regenerative resource of combining inverter output; 3. the electrical parameter of mains-supplied comprises parameters such as voltage, electric current, frequency, phase place; 4. parameters such as power consumption and total electricity consumption are divided in user power utilization net n loop, comprise parameters such as voltage, electric current, frequency, phase place; Carry out the above high Precision Detection of 100 times/s.
The zero counter current network integrating control device makes in the application of regenerative resource electric power and utility grid common network, has " zero adverse current " control defencive function, realizes that the device level essential safety prevents that reverse power from taking place.
The control unit of device adopts the optimized Algorithm that presets to compare computing, calculates the variation tendency (slope) of energy output and power consumption difference, and then draws reverse power with the predicted time that takes place, and sends corresponding control command.
The performance element of device is responsible for pressing control unit instruction following link is implemented to turn-off and making operation: 1. n road regenerative resource; 2. mains-supplied; 3. the n of a consumer networks loop.
Control unit of the present invention, core are microcontroller chips that can satisfy high-speed computation, are made up of it and respective peripheral circuit and device, can carry out 100 times/s above high-accuracy data acquisition and computing.Existing is example to select the C8051F020 chip for use as control unit acp chip of the present invention, and circuit theory diagrams are as shown in Figure 3.
The control unit of zero counter current network integrating control device of the present invention is a kind of control unit that makes the zero adverse current control device of regenerative resource electric power such as solar energy power generating and wind power generation and the application of municipal administration power supply common network.Advantage of the present invention is; Regenerative resource electric power and civil power common network are used; Realize that civil power makes regenerative resource electric power " promptly send out promptly and use " as power backup, make device have " zero adverse current " control defencive function, realize that the device level essential safety prevents that reverse power from taking place.
Description of drawings
Fig. 1 is the structured flowchart of zero counter current network integrating control device;
Fig. 2 is a workflow diagram of the present invention;
Fig. 3 is a control unit circuit principle master drawing.
Embodiment
A kind of control unit of zero counter current network integrating control device; This control unit is used in the zero adverse current control device of using with municipal electrical network common network; The core of control unit is one can carry out the above data acquisition of calculating of 100 times/s and the microcontroller chip of computing; Be preferably (8051F020) and can connect n road regenerative resource direct current power; Through parallel network reverse convert to than line voltage slightly height, frequency, 220V that phase place is consistent is single-phase or 380V three-phase alternating current and civil power common network are supplied power to consumer networks, the optimized Algorithm that this control unit employing is preset compares computing, calculates the variation tendency (slope) of energy output and power consumption difference; Draw reverse power with the predicted time that takes place, and send corresponding control command;
The predicted time that is drawn, when this predicted time during less than the cycle in detecting unit sampling time, the control command of sending part (n-1 road) or all turn-offing regenerative resource electric power to zero counter current network integrating control device performance element.
After control command from part (n-1 road) shutoff regenerative resource electric power to performance element that send; Above-mentioned related data acquisition, regular, computing, control procedure move in circles; Until turn-offing whole regenerative resource electric power, guarantee that the system zero adverse current prevents that reverse power from taking place.
Workflow of the present invention is carried out according to the following steps, and is as shown in Figure 2:
Step 1, receive each detected parameters from detection module (acquisition rate be 100 times/more than the s), comprising: 1. n road regenerative resource electric weight 2. combining inverter export total electric weight 3. consumer networks n divide power consumption etc. in the loop.To the electrical parameter of city power supply, it is regular to comprise that voltage, electric current, frequency and phase place are carried out equivalent, to meet the requirement of unified computing.
The optimized Algorithm that step 2, employing are preset compares computing, calculates the variation tendency (slope) of energy output and power consumption difference, and then draws the predicted time that reverse power takes place.
Step 3, control unit carry out the real-time parameter collection continuously, circularly, equivalent is regular and computing, when the generation reverse power predicted time that draws during the time interval, does not carry out step 4 greater than real-time operation, circulate to carry out step 1 and step 2;
Step 4, the generation reverse power predicted time that draws when control unit are less than real-time operation during the time interval; Send the protection action command to performance element; Part is cut off n-x (x is less than n-1) road or is all cut off regenerative resource electric power, realizes the zero reverse current protection to utility grid.
Step 5, after part is cut off or is all cut off regenerative resource electric power, parameters detects, equivalent is regular, computing is proceeded.When the predicted time value of calculating is (can set) in the time of can not reverse power taking place from 1 minute by 30 minutes in the certain hour; Partial cancellation or cancel all protection action command; Be responsible for part by performance element and connect n-x (x is less than n-1) road or all connect regenerative resource electric power, recover regenerative resource electric power once more and municipal electrical network is supplied power to user power utilization network jointly.
So move in circles.
Claims (5)
1. the control unit of a zero counter current network integrating control device is characterized in that this control unit is used in the zero adverse current control device of using with municipal electrical network common network, and the zero adverse current of implement device prevents that reverse power from taking place,
The workflow of control unit is carried out according to the following steps:
Step 1, receive each detected parameters from detection module, acquisition rate be 100 times/more than the s, comprising: 1. n road regenerative resource electric weight, 2. combining inverter is exported total electric weight, 3. consumer networks n divides power consumption in the loop; It is regular that the electrical parameter of city power supply is comprised that voltage, electric current, frequency and phase place are carried out equivalent, to meet the requirement of unified computing;
The optimized Algorithm that step 2, employing are preset compares computing, and the variation tendency that calculates energy output and power consumption difference is a slope, and then draws the predicted time that reverse power takes place;
Step 3, control unit carry out the real-time parameter collection continuously and circularly, equivalent is regular and computing, when the generation reverse power predicted time that draws during the time interval, does not carry out step 4 greater than real-time operation, circulate to carry out step 1 and step 2;
Step 4, the generation reverse power predicted time that draws when control unit are less than real-time operation during the time interval; Send the protection action command to performance element; Part is cut off the n-x road or is all cut off regenerative resource electric power, realizes the zero reverse current protection to utility grid, and wherein x is less than n-1;
Step 5, after part is cut off or is all cut off regenerative resource electric power, parameters detects, equivalent is regular and computing is proceeded; When the predicted time value of calculating is in the certain hour; Set from 1 minute to 30 minutes; In the time of can not reverse power taking place, partial cancellation or cancel all protection action command are responsible for part by performance element and are connected the n-x road or all connect regenerative resource electric power; Recover regenerative resource electric power and municipal electrical network once more jointly to the user power utilization network power supply, wherein x is less than n-1; So move in circles.
2. the control unit of a kind of zero counter current network integrating control device according to claim 1, the chip that it is characterized in that described control unit core is the C8051F020 chip.
3. the control unit of a kind of zero counter current network integrating control device according to claim 1; It is characterized in that receiving regenerative resource electric power, mains-supplied and the user power utilization network power consumption parameter of zero counter current network integrating control device detecting unit, it is regular for the equivalent of unified quantitative computing to carry out purpose.
4. the control unit of a kind of zero counter current network integrating control device according to claim 3 is characterized in that the regular data of the equivalent of being accomplished carry out computing, and the difference that draws renewable energy power generation and user power utilization amount changes slope.
5. the control unit of a kind of zero counter current network integrating control device according to claim 4; The predicted time that it is characterized in that being drawn is during less than the cycle in detecting unit sampling time; Send the control command of n-1 road shutoff regenerative resource electric power to zero counter current network integrating control device performance element after; Above-mentioned related data acquisition, regular, computing and control procedure move in circles, and until turn-offing whole regenerative resource electric power, guarantee that the system zero adverse current prevents that reverse power from taking place.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009102206309A CN101719677B (en) | 2009-12-10 | 2009-12-10 | Control unit for zero counter current network integrating control device |
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| CN2009102206309A CN101719677B (en) | 2009-12-10 | 2009-12-10 | Control unit for zero counter current network integrating control device |
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| CN101719677B true CN101719677B (en) | 2012-04-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2015003443A1 (en) * | 2013-07-09 | 2015-01-15 | 京东方科技集团股份有限公司 | Anti-countercurrent grid-connected photovoltaic power generation system |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101958555A (en) * | 2010-08-31 | 2011-01-26 | 山东力诺太阳能电力工程有限公司 | Intelligent control system and method of photovoltaic grid-connected power station |
| CN102684136A (en) * | 2011-03-15 | 2012-09-19 | 沈阳西东控制技术有限公司 | Zero-adverse-current predicting method for photovoltaic microgrid common-grid application system |
| CN102684554B (en) * | 2011-03-15 | 2015-09-30 | 沈阳西东控制技术有限公司 | A kind of system transient modelling characteristic wave detection method controlled for photovoltaic micro-grid |
| CN105549665B (en) * | 2016-02-17 | 2017-10-10 | 顺德职业技术学院 | A kind of intelligent environment protection monitoring system and its control method |
| CN111008909A (en) * | 2019-11-19 | 2020-04-14 | 远景智能国际私人投资有限公司 | Anti-reflux protection method, device, equipment and storage medium of energy storage system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1893214A (en) * | 2005-07-05 | 2007-01-10 | 沈阳网格电子信息技术有限公司 | Low-voltage photovotaic parallel-in control device |
| CN101034800A (en) * | 2006-03-07 | 2007-09-12 | 卢一民 | Protection control system for isolated island effect prevention of parallel network reverse power generation device and its method |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1893214A (en) * | 2005-07-05 | 2007-01-10 | 沈阳网格电子信息技术有限公司 | Low-voltage photovotaic parallel-in control device |
| CN101034800A (en) * | 2006-03-07 | 2007-09-12 | 卢一民 | Protection control system for isolated island effect prevention of parallel network reverse power generation device and its method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015003443A1 (en) * | 2013-07-09 | 2015-01-15 | 京东方科技集团股份有限公司 | Anti-countercurrent grid-connected photovoltaic power generation system |
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Granted publication date: 20120418 Termination date: 20191210 |